external/CMakeLists.txt

@@ -16,5 +16,4 @@ add_subdirectory(./sdl)
 add_subdirectory(./imgui)
 
 add_subdirectory(./stb)
-add_subdirectory(./libwebp)
 

external/libwebp/CMakeLists.txt

@@ -1,6 +0,0 @@
-cmake_minimum_required(VERSION 3.9 FATAL_ERROR)
-
-set(WEBP_LINK_STATIC ON CACHE INTERNAL "")
-
-add_subdirectory(./libwebp EXCLUDE_FROM_ALL)
-

external/libwebp/libwebp/.cmake-format.py

@@ -1,240 +0,0 @@
-# ----------------------------------
-# Options affecting listfile parsing
-# ----------------------------------
-with section("parse"):
-
-  # Specify structure for custom cmake functions
-  additional_commands = { 'foo': { 'flags': ['BAR', 'BAZ'],
-             'kwargs': {'DEPENDS': '*', 'HEADERS': '*', 'SOURCES': '*'}}}
-
-  # Override configurations per-command where available
-  override_spec = {}
-
-  # Specify variable tags.
-  vartags = []
-
-  # Specify property tags.
-  proptags = []
-
-# -----------------------------
-# Options affecting formatting.
-# -----------------------------
-with section("format"):
-
-  # Disable formatting entirely, making cmake-format a no-op
-  disable = False
-
-  # How wide to allow formatted cmake files
-  line_width = 80
-
-  # How many spaces to tab for indent
-  tab_size = 2
-
-  # If true, lines are indented using tab characters (utf-8 0x09) instead of
-  # <tab_size> space characters (utf-8 0x20). In cases where the layout would
-  # require a fractional tab character, the behavior of the  fractional
-  # indentation is governed by <fractional_tab_policy>
-  use_tabchars = False
-
-  # If <use_tabchars> is True, then the value of this variable indicates how
-  # fractional indentions are handled during whitespace replacement. If set to
-  # 'use-space', fractional indentation is left as spaces (utf-8 0x20). If set
-  # to `round-up` fractional indentation is replaced with a single tab character
-  # (utf-8 0x09) effectively shifting the column to the next tabstop
-  fractional_tab_policy = 'use-space'
-
-  # If an argument group contains more than this many sub-groups (parg or kwarg
-  # groups) then force it to a vertical layout.
-  max_subgroups_hwrap = 3
-
-  # If a positional argument group contains more than this many arguments, then
-  # force it to a vertical layout.
-  max_pargs_hwrap = 6
-
-  # If a cmdline positional group consumes more than this many lines without
-  # nesting, then invalidate the layout (and nest)
-  max_rows_cmdline = 2
-
-  # If true, separate flow control names from their parentheses with a space
-  separate_ctrl_name_with_space = False
-
-  # If true, separate function names from parentheses with a space
-  separate_fn_name_with_space = False
-
-  # If a statement is wrapped to more than one line, than dangle the closing
-  # parenthesis on its own line.
-  dangle_parens = False
-
-  # If the trailing parenthesis must be 'dangled' on its on line, then align it
-  # to this reference: `prefix`: the start of the statement,  `prefix-indent`:
-  # the start of the statement, plus one indentation  level, `child`: align to
-  # the column of the arguments
-  dangle_align = 'prefix'
-
-  # If the statement spelling length (including space and parenthesis) is
-  # smaller than this amount, then force reject nested layouts.
-  min_prefix_chars = 4
-
-  # If the statement spelling length (including space and parenthesis) is larger
-  # than the tab width by more than this amount, then force reject un-nested
-  # layouts.
-  max_prefix_chars = 10
-
-  # If a candidate layout is wrapped horizontally but it exceeds this many
-  # lines, then reject the layout.
-  max_lines_hwrap = 2
-
-  # What style line endings to use in the output.
-  line_ending = 'unix'
-
-  # Format command names consistently as 'lower' or 'upper' case
-  command_case = 'canonical'
-
-  # Format keywords consistently as 'lower' or 'upper' case
-  keyword_case = 'unchanged'
-
-  # A list of command names which should always be wrapped
-  always_wrap = []
-
-  # If true, the argument lists which are known to be sortable will be sorted
-  # lexicographicall
-  enable_sort = True
-
-  # If true, the parsers may infer whether or not an argument list is sortable
-  # (without annotation).
-  autosort = False
-
-  # By default, if cmake-format cannot successfully fit everything into the
-  # desired linewidth it will apply the last, most agressive attempt that it
-  # made. If this flag is True, however, cmake-format will print error, exit
-  # with non-zero status code, and write-out nothing
-  require_valid_layout = False
-
-  # A dictionary mapping layout nodes to a list of wrap decisions. See the
-  # documentation for more information.
-  layout_passes = {}
-
-# ------------------------------------------------
-# Options affecting comment reflow and formatting.
-# ------------------------------------------------
-with section("markup"):
-
-  # What character to use for bulleted lists
-  bullet_char = '*'
-
-  # What character to use as punctuation after numerals in an enumerated list
-  enum_char = '.'
-
-  # If comment markup is enabled, don't reflow the first comment block in each
-  # listfile. Use this to preserve formatting of your copyright/license
-  # statements.
-  first_comment_is_literal = True
-
-  # If comment markup is enabled, don't reflow any comment block which matches
-  # this (regex) pattern. Default is `None` (disabled).
-  literal_comment_pattern = None
-
-  # Regular expression to match preformat fences in comments default=
-  # ``r'^\s*([`~]{3}[`~]*)(.*)$'``
-  fence_pattern = '^\\s*([`~]{3}[`~]*)(.*)$'
-
-  # Regular expression to match rulers in comments default=
-  # ``r'^\s*[^\w\s]{3}.*[^\w\s]{3}$'``
-  ruler_pattern = '^\\s*[^\\w\\s]{3}.*[^\\w\\s]{3}$'
-
-  # If a comment line matches starts with this pattern then it is explicitly a
-  # trailing comment for the preceeding argument. Default is '#<'
-  explicit_trailing_pattern = '#<'
-
-  # If a comment line starts with at least this many consecutive hash
-  # characters, then don't lstrip() them off. This allows for lazy hash rulers
-  # where the first hash char is not separated by space
-  hashruler_min_length = 10
-
-  # If true, then insert a space between the first hash char and remaining hash
-  # chars in a hash ruler, and normalize its length to fill the column
-  canonicalize_hashrulers = True
-
-  # enable comment markup parsing and reflow
-  enable_markup = True
-
-# ----------------------------
-# Options affecting the linter
-# ----------------------------
-with section("lint"):
-
-  # a list of lint codes to disable
-  disabled_codes = []
-
-  # regular expression pattern describing valid function names
-  function_pattern = '[0-9a-z_]+'
-
-  # regular expression pattern describing valid macro names
-  macro_pattern = '[0-9A-Z_]+'
-
-  # regular expression pattern describing valid names for variables with global
-  # (cache) scope
-  global_var_pattern = '[A-Z][0-9A-Z_]+'
-
-  # regular expression pattern describing valid names for variables with global
-  # scope (but internal semantic)
-  internal_var_pattern = '_[A-Z][0-9A-Z_]+'
-
-  # regular expression pattern describing valid names for variables with local
-  # scope
-  local_var_pattern = '[a-z][a-z0-9_]+'
-
-  # regular expression pattern describing valid names for privatedirectory
-  # variables
-  private_var_pattern = '_[0-9a-z_]+'
-
-  # regular expression pattern describing valid names for public directory
-  # variables
-  public_var_pattern = '[A-Z][0-9A-Z_]+'
-
-  # regular expression pattern describing valid names for function/macro
-  # arguments and loop variables.
-  argument_var_pattern = '[a-z][a-z0-9_]+'
-
-  # regular expression pattern describing valid names for keywords used in
-  # functions or macros
-  keyword_pattern = '[A-Z][0-9A-Z_]+'
-
-  # In the heuristic for C0201, how many conditionals to match within a loop in
-  # before considering the loop a parser.
-  max_conditionals_custom_parser = 2
-
-  # Require at least this many newlines between statements
-  min_statement_spacing = 1
-
-  # Require no more than this many newlines between statements
-  max_statement_spacing = 2
-  max_returns = 6
-  max_branches = 12
-  max_arguments = 5
-  max_localvars = 15
-  max_statements = 50
-
-# -------------------------------
-# Options affecting file encoding
-# -------------------------------
-with section("encode"):
-
-  # If true, emit the unicode byte-order mark (BOM) at the start of the file
-  emit_byteorder_mark = False
-
-  # Specify the encoding of the input file. Defaults to utf-8
-  input_encoding = 'utf-8'
-
-  # Specify the encoding of the output file. Defaults to utf-8. Note that cmake
-  # only claims to support utf-8 so be careful when using anything else
-  output_encoding = 'utf-8'
-
-# -------------------------------------
-# Miscellaneous configurations options.
-# -------------------------------------
-with section("misc"):
-
-  # A dictionary containing any per-command configuration overrides. Currently
-  # only `command_case` is supported.
-  per_command = {}

external/libwebp/libwebp/.gitattributes

@@ -1,6 +0,0 @@
-.gitattributes export-ignore
-.gitignore export-ignore
-.mailmap export-ignore
-*.bat text eol=crlf
-*.pdf -text -diff
-*.ppm -text -diff

external/libwebp/libwebp/.gitignore

@@ -1,56 +0,0 @@
-*.l[ao]
-*.[ao]
-*.pc
-.DS_Store
-.deps
-.idea
-.libs
-.vscode
-/aclocal.m4
-/ar-lib
-/autom4te.cache
-/compile
-/config.*
-/configure
-/depcomp
-/dist
-/install-sh
-/libtool
-/ltmain.sh
-/missing
-/mkinstalldirs
-/stamp-h1
-Makefile
-Makefile.in
-examples/anim_diff
-examples/anim_dump
-examples/[cdv]webp
-examples/gif2webp
-examples/img2webp
-examples/webpinfo
-examples/webpmux
-src/webp/config.h*
-src/webp/stamp-h1
-/output
-/doc/output
-*.idb
-*.pdb
-/iosbuild
-/xcframeworkbuild
-/WebP*.*framework
-CMakeCache.txt
-CMakeFiles/
-cmake_install.cmake
-.gradle
-/build
-extras/get_disto
-extras/vwebp_sdl
-extras/webp_quality
-tests/fuzzer/advanced_api_fuzzer
-tests/fuzzer/animation_api_fuzzer
-tests/fuzzer/animdecoder_fuzzer
-tests/fuzzer/animencoder_fuzzer
-tests/fuzzer/demux_api_fuzzer
-tests/fuzzer/enc_dec_fuzzer
-tests/fuzzer/mux_demux_api_fuzzer
-tests/fuzzer/simple_api_fuzzer

external/libwebp/libwebp/.mailmap

@@ -1,19 +0,0 @@
-Johann Koenig <johann.koenig@duck.com>
-Johann Koenig <johann.koenig@duck.com> <johannkoenig@google.com>
-Mikołaj Zalewski <mikolajz@google.com>
-Pascal Massimino <pascal.massimino@gmail.com>
-Pascal Massimino <pascal.massimino@gmail.com> <skal@google.com>
-Vikas Arora <vikasa@google.com>
-<vikasa@google.com> <vikasa@gmail.com>
-<vikasa@google.com> <vikaas.arora@gmail.com>
-<slobodan.prijic@imgtec.com> <Slobodan.Prijic@imgtec.com>
-<vrabaud@google.com> <vincent.rabaud@gmail.com>
-Vincent Rabaud <vrabaud@google.com>
-Tamar Levy <tamar.levy@intel.com>
-<qrczak@google.com> <qrczak>
-Hui Su <huisu@google.com>
-James Zern <jzern@google.com>
-Roberto Alanis <alanisbaez@google.com>
-Brian Ledger <brianpl@google.com>
-Maryla Ustarroz-Calonge <maryla@google.com>
-Yannis Guyon <yguyon@google.com>

external/libwebp/libwebp/.pylintrc

@@ -1,441 +0,0 @@
-# This Pylint rcfile contains a best-effort configuration to uphold the
-# best-practices and style described in the Google Python style guide:
-#   https://google.github.io/styleguide/pyguide.html
-#
-# Its canonical open-source location is:
-#   https://google.github.io/styleguide/pylintrc
-
-[MASTER]
-
-# Files or directories to be skipped. They should be base names, not paths.
-ignore=third_party
-
-# Files or directories matching the regex patterns are skipped. The regex
-# matches against base names, not paths.
-ignore-patterns=
-
-# Pickle collected data for later comparisons.
-persistent=no
-
-# List of plugins (as comma separated values of python modules names) to load,
-# usually to register additional checkers.
-load-plugins=
-
-# Use multiple processes to speed up Pylint.
-jobs=4
-
-# Allow loading of arbitrary C extensions. Extensions are imported into the
-# active Python interpreter and may run arbitrary code.
-unsafe-load-any-extension=no
-
-
-[MESSAGES CONTROL]
-
-# Only show warnings with the listed confidence levels. Leave empty to show
-# all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED
-confidence=
-
-# Enable the message, report, category or checker with the given id(s). You can
-# either give multiple identifier separated by comma (,) or put this option
-# multiple time (only on the command line, not in the configuration file where
-# it should appear only once). See also the "--disable" option for examples.
-#enable=
-
-# Disable the message, report, category or checker with the given id(s). You
-# can either give multiple identifiers separated by comma (,) or put this
-# option multiple times (only on the command line, not in the configuration
-# file where it should appear only once).You can also use "--disable=all" to
-# disable everything first and then reenable specific checks. For example, if
-# you want to run only the similarities checker, you can use "--disable=all
-# --enable=similarities". If you want to run only the classes checker, but have
-# no Warning level messages displayed, use"--disable=all --enable=classes
-# --disable=W"
-disable=abstract-method,
-        apply-builtin,
-        arguments-differ,
-        attribute-defined-outside-init,
-        backtick,
-        bad-option-value,
-        basestring-builtin,
-        buffer-builtin,
-        c-extension-no-member,
-        consider-using-enumerate,
-        cmp-builtin,
-        cmp-method,
-        coerce-builtin,
-        coerce-method,
-        delslice-method,
-        div-method,
-        duplicate-code,
-        eq-without-hash,
-        execfile-builtin,
-        file-builtin,
-        filter-builtin-not-iterating,
-        fixme,
-        getslice-method,
-        global-statement,
-        hex-method,
-        idiv-method,
-        implicit-str-concat-in-sequence,
-        import-error,
-        import-self,
-        import-star-module-level,
-        inconsistent-return-statements,
-        input-builtin,
-        intern-builtin,
-        invalid-str-codec,
-        locally-disabled,
-        long-builtin,
-        long-suffix,
-        map-builtin-not-iterating,
-        misplaced-comparison-constant,
-        missing-function-docstring,
-        metaclass-assignment,
-        next-method-called,
-        next-method-defined,
-        no-absolute-import,
-        no-else-break,
-        no-else-continue,
-        no-else-raise,
-        no-else-return,
-        no-init,  # added
-        no-member,
-        no-name-in-module,
-        no-self-use,
-        nonzero-method,
-        oct-method,
-        old-division,
-        old-ne-operator,
-        old-octal-literal,
-        old-raise-syntax,
-        parameter-unpacking,
-        print-statement,
-        raising-string,
-        range-builtin-not-iterating,
-        raw_input-builtin,
-        rdiv-method,
-        reduce-builtin,
-        relative-import,
-        reload-builtin,
-        round-builtin,
-        setslice-method,
-        signature-differs,
-        standarderror-builtin,
-        suppressed-message,
-        sys-max-int,
-        too-few-public-methods,
-        too-many-ancestors,
-        too-many-arguments,
-        too-many-boolean-expressions,
-        too-many-branches,
-        too-many-instance-attributes,
-        too-many-locals,
-        too-many-nested-blocks,
-        too-many-public-methods,
-        too-many-return-statements,
-        too-many-statements,
-        trailing-newlines,
-        unichr-builtin,
-        unicode-builtin,
-        unnecessary-pass,
-        unpacking-in-except,
-        useless-else-on-loop,
-        useless-object-inheritance,
-        useless-suppression,
-        using-cmp-argument,
-        wrong-import-order,
-        xrange-builtin,
-        zip-builtin-not-iterating,
-
-
-[REPORTS]
-
-# Set the output format. Available formats are text, parseable, colorized, msvs
-# (visual studio) and html. You can also give a reporter class, eg
-# mypackage.mymodule.MyReporterClass.
-output-format=text
-
-# Put messages in a separate file for each module / package specified on the
-# command line instead of printing them on stdout. Reports (if any) will be
-# written in a file name "pylint_global.[txt|html]". This option is deprecated
-# and it will be removed in Pylint 2.0.
-files-output=no
-
-# Tells whether to display a full report or only the messages
-reports=no
-
-# Python expression which should return a note less than 10 (10 is the highest
-# note). You have access to the variables errors warning, statement which
-# respectively contain the number of errors / warnings messages and the total
-# number of statements analyzed. This is used by the global evaluation report
-# (RP0004).
-evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
-
-# Template used to display messages. This is a python new-style format string
-# used to format the message information. See doc for all details
-#msg-template=
-
-
-[BASIC]
-
-# Good variable names which should always be accepted, separated by a comma
-good-names=main,_,PRESUBMIT
-
-# Bad variable names which should always be refused, separated by a comma
-bad-names=
-
-# Colon-delimited sets of names that determine each other's naming style when
-# the name regexes allow several styles.
-name-group=
-
-# Include a hint for the correct naming format with invalid-name
-include-naming-hint=no
-
-# List of decorators that produce properties, such as abc.abstractproperty. Add
-# to this list to register other decorators that produce valid properties.
-property-classes=abc.abstractproperty,cached_property.cached_property,cached_property.threaded_cached_property,cached_property.cached_property_with_ttl,cached_property.threaded_cached_property_with_ttl
-
-# Regular expression matching correct function names
-function-rgx=^(?:(?P<exempt>setUp|tearDown|setUpModule|tearDownModule)|(?P<camel_case>_?[A-Z][a-zA-Z0-9]*)|(?P<snake_case>_?[a-z][a-z0-9_]*))$
-
-# Regular expression matching correct variable names
-variable-rgx=^[a-z][a-z0-9_]*$
-
-# Regular expression matching correct constant names
-const-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
-
-# Regular expression matching correct attribute names
-attr-rgx=^_{0,2}[a-z][a-z0-9_]*$
-
-# Regular expression matching correct argument names
-argument-rgx=^[a-z][a-z0-9_]*$
-
-# Regular expression matching correct class attribute names
-class-attribute-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
-
-# Regular expression matching correct inline iteration names
-inlinevar-rgx=^[a-z][a-z0-9_]*$
-
-# Regular expression matching correct class names
-class-rgx=^_?[A-Z][a-zA-Z0-9]*$
-
-# Regular expression matching correct module names
-module-rgx=^(_?[a-z][a-z0-9_]*|__init__)$
-
-# Regular expression matching correct method names
-method-rgx=(?x)^(?:(?P<exempt>_[a-z0-9_]+__|runTest|setUp|tearDown|setUpTestCase|tearDownTestCase|setupSelf|tearDownClass|setUpClass|(test|assert)_*[A-Z0-9][a-zA-Z0-9_]*|next)|(?P<camel_case>_{0,2}[A-Z][a-zA-Z0-9_]*)|(?P<snake_case>_{0,2}[a-z][a-z0-9_]*))$
-
-# Regular expression which should only match function or class names that do
-# not require a docstring.
-no-docstring-rgx=(__.*__|main|test.*|.*test|.*Test)$
-
-# Minimum line length for functions/classes that require docstrings, shorter
-# ones are exempt.
-docstring-min-length=10
-
-
-[TYPECHECK]
-
-# List of decorators that produce context managers, such as
-# contextlib.contextmanager. Add to this list to register other decorators that
-# produce valid context managers.
-contextmanager-decorators=contextlib.contextmanager,contextlib2.contextmanager
-
-# Tells whether missing members accessed in mixin class should be ignored. A
-# mixin class is detected if its name ends with "mixin" (case insensitive).
-ignore-mixin-members=yes
-
-# List of module names for which member attributes should not be checked
-# (useful for modules/projects where namespaces are manipulated during runtime
-# and thus existing member attributes cannot be deduced by static analysis. It
-# supports qualified module names, as well as Unix pattern matching.
-ignored-modules=
-
-# List of class names for which member attributes should not be checked (useful
-# for classes with dynamically set attributes). This supports the use of
-# qualified names.
-ignored-classes=optparse.Values,thread._local,_thread._local
-
-# List of members which are set dynamically and missed by pylint inference
-# system, and so shouldn't trigger E1101 when accessed. Python regular
-# expressions are accepted.
-generated-members=
-
-
-[FORMAT]
-
-# Maximum number of characters on a single line.
-max-line-length=80
-
-# TODO(https://github.com/PyCQA/pylint/issues/3352): Direct pylint to exempt
-# lines made too long by directives to pytype.
-
-# Regexp for a line that is allowed to be longer than the limit.
-ignore-long-lines=(?x)(
-  ^\s*(\#\ )?<?https?://\S+>?$|
-  ^\s*(from\s+\S+\s+)?import\s+.+$)
-
-# Allow the body of an if to be on the same line as the test if there is no
-# else.
-single-line-if-stmt=yes
-
-# List of optional constructs for which whitespace checking is disabled. `dict-
-# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
-# `trailing-comma` allows a space between comma and closing bracket: (a, ).
-# `empty-line` allows space-only lines.
-no-space-check=
-
-# Maximum number of lines in a module
-max-module-lines=99999
-
-# String used as indentation unit.  The internal Google style guide mandates 2
-# spaces.  Google's externaly-published style guide says 4, consistent with
-# PEP 8.  Here, we use 2 spaces, for conformity with many open-sourced Google
-# projects (like TensorFlow).
-indent-string='  '
-
-# Number of spaces of indent required inside a hanging  or continued line.
-indent-after-paren=4
-
-# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
-expected-line-ending-format=
-
-
-[MISCELLANEOUS]
-
-# List of note tags to take in consideration, separated by a comma.
-notes=TODO
-
-
-[STRING]
-
-# This flag controls whether inconsistent-quotes generates a warning when the
-# character used as a quote delimiter is used inconsistently within a module.
-check-quote-consistency=yes
-
-
-[VARIABLES]
-
-# Tells whether we should check for unused import in __init__ files.
-init-import=no
-
-# A regular expression matching the name of dummy variables (i.e. expectedly
-# not used).
-dummy-variables-rgx=^\*{0,2}(_$|unused_|dummy_)
-
-# List of additional names supposed to be defined in builtins. Remember that
-# you should avoid to define new builtins when possible.
-additional-builtins=
-
-# List of strings which can identify a callback function by name. A callback
-# name must start or end with one of those strings.
-callbacks=cb_,_cb
-
-# List of qualified module names which can have objects that can redefine
-# builtins.
-redefining-builtins-modules=six,six.moves,past.builtins,future.builtins,functools
-
-
-[LOGGING]
-
-# Logging modules to check that the string format arguments are in logging
-# function parameter format
-logging-modules=logging,absl.logging,tensorflow.io.logging
-
-
-[SIMILARITIES]
-
-# Minimum lines number of a similarity.
-min-similarity-lines=4
-
-# Ignore comments when computing similarities.
-ignore-comments=yes
-
-# Ignore docstrings when computing similarities.
-ignore-docstrings=yes
-
-# Ignore imports when computing similarities.
-ignore-imports=no
-
-
-[SPELLING]
-
-# Spelling dictionary name. Available dictionaries: none. To make it working
-# install python-enchant package.
-spelling-dict=
-
-# List of comma separated words that should not be checked.
-spelling-ignore-words=
-
-# A path to a file that contains private dictionary; one word per line.
-spelling-private-dict-file=
-
-# Tells whether to store unknown words to indicated private dictionary in
-# --spelling-private-dict-file option instead of raising a message.
-spelling-store-unknown-words=no
-
-
-[IMPORTS]
-
-# Deprecated modules which should not be used, separated by a comma
-deprecated-modules=regsub,
-                   TERMIOS,
-                   Bastion,
-                   rexec,
-                   sets
-
-# Create a graph of every (i.e. internal and external) dependencies in the
-# given file (report RP0402 must not be disabled)
-import-graph=
-
-# Create a graph of external dependencies in the given file (report RP0402 must
-# not be disabled)
-ext-import-graph=
-
-# Create a graph of internal dependencies in the given file (report RP0402 must
-# not be disabled)
-int-import-graph=
-
-# Force import order to recognize a module as part of the standard
-# compatibility libraries.
-known-standard-library=
-
-# Force import order to recognize a module as part of a third party library.
-known-third-party=enchant, absl
-
-# Analyse import fallback blocks. This can be used to support both Python 2 and
-# 3 compatible code, which means that the block might have code that exists
-# only in one or another interpreter, leading to false positives when analysed.
-analyse-fallback-blocks=no
-
-
-[CLASSES]
-
-# List of method names used to declare (i.e. assign) instance attributes.
-defining-attr-methods=__init__,
-                      __new__,
-                      setUp
-
-# List of member names, which should be excluded from the protected access
-# warning.
-exclude-protected=_asdict,
-                  _fields,
-                  _replace,
-                  _source,
-                  _make
-
-# List of valid names for the first argument in a class method.
-valid-classmethod-first-arg=cls,
-                            class_
-
-# List of valid names for the first argument in a metaclass class method.
-valid-metaclass-classmethod-first-arg=mcs
-
-
-[EXCEPTIONS]
-
-# Exceptions that will emit a warning when being caught. Defaults to
-# "Exception"
-overgeneral-exceptions=StandardError,
-                       Exception,
-                       BaseException

external/libwebp/libwebp/.style.yapf

@@ -1,2 +0,0 @@
-[style]
-based_on_style = yapf

external/libwebp/libwebp/AUTHORS

@@ -1,60 +0,0 @@
-Contributors:
-- Aidan O'Loan (aidanol at gmail dot com)
-- Alan Browning (browning at google dot com)
-- Alexandru Ardelean (ardeleanalex at gmail dot com)
-- Brian Ledger (brianpl at google dot com)
-- Charles Munger (clm at google dot com)
-- Cheng Yi (cyi at google dot com)
-- Christian Duvivier (cduvivier at google dot com)
-- Christopher Degawa (ccom at randomderp dot com)
-- Clement Courbet (courbet at google dot com)
-- Djordje Pesut (djordje dot pesut at imgtec dot com)
-- Frank Barchard (fbarchard at google dot com)
-- Hui Su (huisu at google dot com)
-- H. Vetinari (h dot vetinari at gmx dot com)
-- Ilya Kurdyukov (jpegqs at gmail dot com)
-- Ingvar Stepanyan (rreverser at google dot com)
-- James Zern (jzern at google dot com)
-- Jan Engelhardt (jengelh at medozas dot de)
-- Jehan (jehan at girinstud dot io)
-- Jeremy Maitin-Shepard (jbms at google dot com)
-- Johann Koenig (johann dot koenig at duck dot com)
-- Jovan Zelincevic (jovan dot zelincevic at imgtec dot com)
-- Jyrki Alakuijala (jyrki at google dot com)
-- Konstantin Ivlev (tomskside at gmail dot com)
-- Lode Vandevenne (lode at google dot com)
-- Lou Quillio (louquillio at google dot com)
-- Mans Rullgard (mans at mansr dot com)
-- Marcin Kowalczyk (qrczak at google dot com)
-- Martin Olsson (mnemo at minimum dot se)
-- Maryla Ustarroz-Calonge (maryla at google dot com)
-- Mikołaj Zalewski (mikolajz at google dot com)
-- Mislav Bradac (mislavm at google dot com)
-- Nico Weber (thakis at chromium dot org)
-- Noel Chromium (noel at chromium dot org)
-- Nozomi Isozaki (nontan at pixiv dot co dot jp)
-- Oliver Wolff (oliver dot wolff at qt dot io)
-- Owen Rodley (orodley at google dot com)
-- Parag Salasakar (img dot mips1 at gmail dot com)
-- Pascal Massimino (pascal dot massimino at gmail dot com)
-- Paweł Hajdan, Jr (phajdan dot jr at chromium dot org)
-- Pierre Joye (pierre dot php at gmail dot com)
-- Roberto Alanis (alanisbaez at google dot com)
-- Sam Clegg (sbc at chromium dot org)
-- Scott Hancher (seh at google dot com)
-- Scott LaVarnway (slavarnway at google dot com)
-- Scott Talbot (s at chikachow dot org)
-- Slobodan Prijic (slobodan dot prijic at imgtec dot com)
-- Somnath Banerjee (somnath dot banerjee at gmail dot com)
-- Sriraman Tallam (tmsriram at google dot com)
-- Tamar Levy (tamar dot levy at intel dot com)
-- Thiago Perrotta (tperrotta at google dot com)
-- Timothy Gu (timothygu99 at gmail dot com)
-- Urvang Joshi (urvang at google dot com)
-- Vikas Arora (vikasa at google dot com)
-- Vincent Rabaud (vrabaud at google dot com)
-- Vlad Tsyrklevich (vtsyrklevich at chromium dot org)
-- Wan-Teh Chang (wtc at google dot com)
-- Yang Zhang (yang dot zhang at arm dot com)
-- Yannis Guyon (yguyon at google dot com)
-- Zhi An Ng (zhin at chromium dot org)

external/libwebp/libwebp/Android.mk

@@ -1,295 +0,0 @@
-# Ignore this file during non-NDK builds.
-ifdef NDK_ROOT
-LOCAL_PATH := $(call my-dir)
-
-WEBP_CFLAGS := -Wall -DANDROID -DHAVE_MALLOC_H -DHAVE_PTHREAD -DWEBP_USE_THREAD
-WEBP_CFLAGS += -fvisibility=hidden
-
-ifeq ($(APP_OPTIM),release)
-  WEBP_CFLAGS += -finline-functions -ffast-math \
-                 -ffunction-sections -fdata-sections
-  ifeq ($(findstring clang,$(NDK_TOOLCHAIN_VERSION)),)
-    WEBP_CFLAGS += -frename-registers -s
-  endif
-endif
-
-# mips32 fails to build with clang from r14b
-# https://bugs.chromium.org/p/webp/issues/detail?id=343
-ifeq ($(findstring clang,$(NDK_TOOLCHAIN_VERSION)),clang)
-  ifeq ($(TARGET_ARCH),mips)
-    clang_version := $(shell $(TARGET_CC) --version)
-    ifneq ($(findstring clang version 3,$(clang_version)),)
-      WEBP_CFLAGS += -no-integrated-as
-    endif
-  endif
-endif
-
-ifneq ($(findstring armeabi-v7a, $(TARGET_ARCH_ABI)),)
-  # Setting LOCAL_ARM_NEON will enable -mfpu=neon which may cause illegal
-  # instructions to be generated for armv7a code. Instead target the neon code
-  # specifically.
-  NEON := c.neon
-  USE_CPUFEATURES := yes
-  WEBP_CFLAGS += -DHAVE_CPU_FEATURES_H
-else
-  NEON := c
-endif
-
-sharpyuv_srcs := \
-    sharpyuv/sharpyuv.c \
-    sharpyuv/sharpyuv_cpu.c \
-    sharpyuv/sharpyuv_csp.c \
-    sharpyuv/sharpyuv_dsp.c \
-    sharpyuv/sharpyuv_gamma.c \
-    sharpyuv/sharpyuv_neon.$(NEON) \
-    sharpyuv/sharpyuv_sse2.c \
-
-dec_srcs := \
-    src/dec/alpha_dec.c \
-    src/dec/buffer_dec.c \
-    src/dec/frame_dec.c \
-    src/dec/idec_dec.c \
-    src/dec/io_dec.c \
-    src/dec/quant_dec.c \
-    src/dec/tree_dec.c \
-    src/dec/vp8_dec.c \
-    src/dec/vp8l_dec.c \
-    src/dec/webp_dec.c \
-
-demux_srcs := \
-    src/demux/anim_decode.c \
-    src/demux/demux.c \
-
-dsp_dec_srcs := \
-    src/dsp/alpha_processing.c \
-    src/dsp/alpha_processing_mips_dsp_r2.c \
-    src/dsp/alpha_processing_neon.$(NEON) \
-    src/dsp/alpha_processing_sse2.c \
-    src/dsp/alpha_processing_sse41.c \
-    src/dsp/cpu.c \
-    src/dsp/dec.c \
-    src/dsp/dec_clip_tables.c \
-    src/dsp/dec_mips32.c \
-    src/dsp/dec_mips_dsp_r2.c \
-    src/dsp/dec_msa.c \
-    src/dsp/dec_neon.$(NEON) \
-    src/dsp/dec_sse2.c \
-    src/dsp/dec_sse41.c \
-    src/dsp/filters.c \
-    src/dsp/filters_mips_dsp_r2.c \
-    src/dsp/filters_msa.c \
-    src/dsp/filters_neon.$(NEON) \
-    src/dsp/filters_sse2.c \
-    src/dsp/lossless.c \
-    src/dsp/lossless_mips_dsp_r2.c \
-    src/dsp/lossless_msa.c \
-    src/dsp/lossless_neon.$(NEON) \
-    src/dsp/lossless_sse2.c \
-    src/dsp/lossless_sse41.c \
-    src/dsp/rescaler.c \
-    src/dsp/rescaler_mips32.c \
-    src/dsp/rescaler_mips_dsp_r2.c \
-    src/dsp/rescaler_msa.c \
-    src/dsp/rescaler_neon.$(NEON) \
-    src/dsp/rescaler_sse2.c \
-    src/dsp/upsampling.c \
-    src/dsp/upsampling_mips_dsp_r2.c \
-    src/dsp/upsampling_msa.c \
-    src/dsp/upsampling_neon.$(NEON) \
-    src/dsp/upsampling_sse2.c \
-    src/dsp/upsampling_sse41.c \
-    src/dsp/yuv.c \
-    src/dsp/yuv_mips32.c \
-    src/dsp/yuv_mips_dsp_r2.c \
-    src/dsp/yuv_neon.$(NEON) \
-    src/dsp/yuv_sse2.c \
-    src/dsp/yuv_sse41.c \
-
-dsp_enc_srcs := \
-    src/dsp/cost.c \
-    src/dsp/cost_mips32.c \
-    src/dsp/cost_mips_dsp_r2.c \
-    src/dsp/cost_neon.$(NEON) \
-    src/dsp/cost_sse2.c \
-    src/dsp/enc.c \
-    src/dsp/enc_mips32.c \
-    src/dsp/enc_mips_dsp_r2.c \
-    src/dsp/enc_msa.c \
-    src/dsp/enc_neon.$(NEON) \
-    src/dsp/enc_sse2.c \
-    src/dsp/enc_sse41.c \
-    src/dsp/lossless_enc.c \
-    src/dsp/lossless_enc_mips32.c \
-    src/dsp/lossless_enc_mips_dsp_r2.c \
-    src/dsp/lossless_enc_msa.c \
-    src/dsp/lossless_enc_neon.$(NEON) \
-    src/dsp/lossless_enc_sse2.c \
-    src/dsp/lossless_enc_sse41.c \
-    src/dsp/ssim.c \
-    src/dsp/ssim_sse2.c \
-
-enc_srcs := \
-    src/enc/alpha_enc.c \
-    src/enc/analysis_enc.c \
-    src/enc/backward_references_cost_enc.c \
-    src/enc/backward_references_enc.c \
-    src/enc/config_enc.c \
-    src/enc/cost_enc.c \
-    src/enc/filter_enc.c \
-    src/enc/frame_enc.c \
-    src/enc/histogram_enc.c \
-    src/enc/iterator_enc.c \
-    src/enc/near_lossless_enc.c \
-    src/enc/picture_enc.c \
-    src/enc/picture_csp_enc.c \
-    src/enc/picture_psnr_enc.c \
-    src/enc/picture_rescale_enc.c \
-    src/enc/picture_tools_enc.c \
-    src/enc/predictor_enc.c \
-    src/enc/quant_enc.c \
-    src/enc/syntax_enc.c \
-    src/enc/token_enc.c \
-    src/enc/tree_enc.c \
-    src/enc/vp8l_enc.c \
-    src/enc/webp_enc.c \
-
-mux_srcs := \
-    src/mux/anim_encode.c \
-    src/mux/muxedit.c \
-    src/mux/muxinternal.c \
-    src/mux/muxread.c \
-
-utils_dec_srcs := \
-    src/utils/bit_reader_utils.c \
-    src/utils/color_cache_utils.c \
-    src/utils/filters_utils.c \
-    src/utils/huffman_utils.c \
-    src/utils/palette.c \
-    src/utils/quant_levels_dec_utils.c \
-    src/utils/random_utils.c \
-    src/utils/rescaler_utils.c \
-    src/utils/thread_utils.c \
-    src/utils/utils.c \
-
-utils_enc_srcs := \
-    src/utils/bit_writer_utils.c \
-    src/utils/huffman_encode_utils.c \
-    src/utils/quant_levels_utils.c \
-
-################################################################################
-# libwebpdecoder
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    $(dec_srcs) \
-    $(dsp_dec_srcs) \
-    $(utils_dec_srcs) \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_EXPORT_C_INCLUDES += $(LOCAL_PATH)/src
-
-# prefer arm over thumb mode for performance gains
-LOCAL_ARM_MODE := arm
-
-ifeq ($(USE_CPUFEATURES),yes)
-  LOCAL_STATIC_LIBRARIES := cpufeatures
-endif
-
-LOCAL_MODULE := webpdecoder_static
-
-include $(BUILD_STATIC_LIBRARY)
-
-ifeq ($(ENABLE_SHARED),1)
-include $(CLEAR_VARS)
-
-LOCAL_WHOLE_STATIC_LIBRARIES := webpdecoder_static
-
-LOCAL_MODULE := webpdecoder
-
-include $(BUILD_SHARED_LIBRARY)
-endif  # ENABLE_SHARED=1
-
-################################################################################
-# libwebp
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    $(sharpyuv_srcs) \
-    $(dsp_enc_srcs) \
-    $(enc_srcs) \
-    $(utils_enc_srcs) \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_EXPORT_C_INCLUDES += $(LOCAL_PATH)/src $(LOCAL_PATH)
-
-# prefer arm over thumb mode for performance gains
-LOCAL_ARM_MODE := arm
-
-LOCAL_WHOLE_STATIC_LIBRARIES := webpdecoder_static
-
-LOCAL_MODULE := webp
-
-ifeq ($(ENABLE_SHARED),1)
-  include $(BUILD_SHARED_LIBRARY)
-else
-  include $(BUILD_STATIC_LIBRARY)
-endif
-
-################################################################################
-# libwebpdemux
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := $(demux_srcs)
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_EXPORT_C_INCLUDES += $(LOCAL_PATH)/src
-
-# prefer arm over thumb mode for performance gains
-LOCAL_ARM_MODE := arm
-
-LOCAL_MODULE := webpdemux
-
-ifeq ($(ENABLE_SHARED),1)
-  LOCAL_SHARED_LIBRARIES := webp
-  include $(BUILD_SHARED_LIBRARY)
-else
-  LOCAL_STATIC_LIBRARIES := webp
-  include $(BUILD_STATIC_LIBRARY)
-endif
-
-################################################################################
-# libwebpmux
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := $(mux_srcs)
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_EXPORT_C_INCLUDES += $(LOCAL_PATH)/src
-
-# prefer arm over thumb mode for performance gains
-LOCAL_ARM_MODE := arm
-
-LOCAL_MODULE := webpmux
-
-ifeq ($(ENABLE_SHARED),1)
-  LOCAL_SHARED_LIBRARIES := webp
-  include $(BUILD_SHARED_LIBRARY)
-else
-  LOCAL_STATIC_LIBRARIES := webp
-  include $(BUILD_STATIC_LIBRARY)
-endif
-
-################################################################################
-
-WEBP_SRC_PATH := $(LOCAL_PATH)
-include $(WEBP_SRC_PATH)/imageio/Android.mk
-include $(WEBP_SRC_PATH)/examples/Android.mk
-
-ifeq ($(USE_CPUFEATURES),yes)
-  $(call import-module,android/cpufeatures)
-endif
-endif  # NDK_ROOT

external/libwebp/libwebp/CMakeLists.txt

@@ -1,802 +0,0 @@
-#  Copyright (c) 2020 Google LLC.
-#
-#  Use of this source code is governed by a BSD-style license
-#  that can be found in the LICENSE file in the root of the source
-#  tree. An additional intellectual property rights grant can be found
-#  in the file PATENTS.  All contributing project authors may
-#  be found in the AUTHORS file in the root of the source tree.
-
-if(APPLE)
-  cmake_minimum_required(VERSION 3.17)
-else()
-  cmake_minimum_required(VERSION 3.7)
-endif()
-
-if(POLICY CMP0072)
-  cmake_policy(SET CMP0072 NEW)
-endif()
-
-project(WebP C)
-
-# Options for coder / decoder executables.
-if(BUILD_SHARED_LIBS)
-  set(WEBP_LINK_STATIC_DEFAULT OFF)
-else()
-  set(WEBP_LINK_STATIC_DEFAULT ON)
-endif()
-option(WEBP_LINK_STATIC
-       "Link using static libraries. If OFF, use dynamic libraries."
-       ${WEBP_LINK_STATIC_DEFAULT})
-if(NOT EMSCRIPTEN)
-  # Disable SIMD on Emscripten by default, as it's a new unstable Wasm feature.
-  # Users can still explicitly opt-in to make a SIMD-enabled build.
-  set(WEBP_ENABLE_SIMD_DEFAULT ON)
-endif()
-option(WEBP_ENABLE_SIMD "Enable any SIMD optimization."
-       ${WEBP_ENABLE_SIMD_DEFAULT})
-option(WEBP_BUILD_ANIM_UTILS "Build animation utilities." ON)
-option(WEBP_BUILD_CWEBP "Build the cwebp command line tool." ON)
-option(WEBP_BUILD_DWEBP "Build the dwebp command line tool." ON)
-option(WEBP_BUILD_GIF2WEBP "Build the gif2webp conversion tool." ON)
-option(WEBP_BUILD_IMG2WEBP "Build the img2webp animation tool." ON)
-option(WEBP_BUILD_VWEBP "Build the vwebp viewer tool." ON)
-option(WEBP_BUILD_WEBPINFO "Build the webpinfo command line tool." ON)
-option(WEBP_BUILD_LIBWEBPMUX "Build the libwebpmux library." ON)
-option(WEBP_BUILD_WEBPMUX "Build the webpmux command line tool." ON)
-option(WEBP_BUILD_EXTRAS "Build extras." ON)
-option(WEBP_BUILD_WEBP_JS "Emscripten build of webp.js." OFF)
-option(WEBP_USE_THREAD "Enable threading support" ON)
-option(WEBP_NEAR_LOSSLESS "Enable near-lossless encoding" ON)
-option(WEBP_ENABLE_SWAP_16BIT_CSP "Enable byte swap for 16 bit colorspaces."
-       OFF)
-set(WEBP_BITTRACE "0" CACHE STRING "Bit trace mode (0=none, 1=bit, 2=bytes)")
-set_property(CACHE WEBP_BITTRACE PROPERTY STRINGS 0 1 2)
-
-if(WEBP_LINK_STATIC)
-  if(WIN32)
-    set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
-  else()
-    set(CMAKE_FIND_LIBRARY_SUFFIXES .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
-  endif()
-  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-  # vwebp does not compile on Ubuntu with static libraries so disabling it for
-  # now.
-  set(WEBP_BUILD_VWEBP OFF)
-endif()
-
-# Option needed for handling Unicode file names on Windows.
-if(WIN32)
-  option(WEBP_UNICODE "Build Unicode executables." ON)
-endif()
-
-if(WEBP_BUILD_WEBP_JS)
-  set(WEBP_BUILD_ANIM_UTILS OFF)
-  set(WEBP_BUILD_CWEBP OFF)
-  set(WEBP_BUILD_DWEBP OFF)
-  set(WEBP_BUILD_GIF2WEBP OFF)
-  set(WEBP_BUILD_IMG2WEBP OFF)
-  set(WEBP_BUILD_VWEBP OFF)
-  set(WEBP_BUILD_WEBPINFO OFF)
-  set(WEBP_BUILD_WEBPMUX OFF)
-  set(WEBP_BUILD_EXTRAS OFF)
-  set(WEBP_USE_THREAD OFF)
-
-  if(WEBP_ENABLE_SIMD)
-    message(NOTICE
-            "wasm2js does not support SIMD, disabling webp.js generation.")
-  endif()
-endif()
-
-set(SHARPYUV_DEP_LIBRARIES)
-set(SHARPYUV_DEP_INCLUDE_DIRS)
-set(WEBP_DEP_LIBRARIES)
-set(WEBP_DEP_INCLUDE_DIRS)
-
-if(NOT CMAKE_BUILD_TYPE)
-  set(CMAKE_BUILD_TYPE "Release"
-      CACHE STRING "Build type: Release, Debug, MinSizeRel or RelWithDebInfo"
-            FORCE)
-endif()
-
-# Include dependencies.
-if(WEBP_BUILD_ANIM_UTILS
-   OR WEBP_BUILD_CWEBP
-   OR WEBP_BUILD_DWEBP
-   OR WEBP_BUILD_EXTRAS
-   OR WEBP_BUILD_GIF2WEBP
-   OR WEBP_BUILD_IMG2WEBP)
-  set(WEBP_FIND_IMG_LIBS TRUE)
-else()
-  set(WEBP_FIND_IMG_LIBS FALSE)
-endif()
-include(cmake/deps.cmake)
-include(GNUInstallDirs)
-
-if(BUILD_SHARED_LIBS AND NOT DEFINED CMAKE_INSTALL_RPATH)
-  # Set the rpath to match autoconf/libtool behavior. Note this must be set
-  # before target creation.
-  set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
-endif()
-
-# ##############################################################################
-# Options.
-if(WEBP_ENABLE_SWAP_16BIT_CSP)
-  add_definitions(-DWEBP_SWAP_16BIT_CSP=1)
-endif()
-
-if(NOT WEBP_BITTRACE STREQUAL "0")
-  add_definitions(-DBITTRACE=${WEBP_BITTRACE})
-endif()
-
-if(WEBP_UNICODE)
-  # Windows recommends setting both UNICODE and _UNICODE.
-  add_definitions(-DUNICODE -D_UNICODE)
-endif()
-
-if(MSVC AND BUILD_SHARED_LIBS)
-  add_definitions(-DWEBP_DLL)
-endif()
-
-# pkg-config variables used by *.pc.in.
-set(prefix ${CMAKE_INSTALL_PREFIX})
-set(exec_prefix "\${prefix}")
-if(IS_ABSOLUTE "${CMAKE_INSTALL_LIBDIR}")
-  set(libdir "${CMAKE_INSTALL_LIBDIR}")
-else()
-  set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
-endif()
-if(IS_ABSOLUTE "${CMAKE_INSTALL_INCLUDEDIR}")
-  set(includedir "${CMAKE_INSTALL_INCLUDEDIR}")
-else()
-  set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
-endif()
-set(PTHREAD_LIBS ${CMAKE_THREAD_LIBS_INIT})
-set(INSTALLED_LIBRARIES)
-
-if(MSVC)
-  # match the naming convention used by nmake
-  set(webp_libname_prefix "lib")
-  set(CMAKE_SHARED_LIBRARY_PREFIX "${webp_libname_prefix}")
-  set(CMAKE_IMPORT_LIBRARY_PREFIX "${webp_libname_prefix}")
-  set(CMAKE_STATIC_LIBRARY_PREFIX "${webp_libname_prefix}")
-endif()
-
-set(CMAKE_C_VISIBILITY_PRESET hidden)
-
-# ##############################################################################
-# Android only.
-if(ANDROID)
-  include_directories(${ANDROID_NDK}/sources/android/cpufeatures)
-  add_library(cpufeatures-webp STATIC
-              ${ANDROID_NDK}/sources/android/cpufeatures/cpu-features.c)
-  list(APPEND INSTALLED_LIBRARIES cpufeatures-webp)
-  target_link_libraries(cpufeatures-webp dl)
-  set(SHARPYUV_DEP_LIBRARIES ${SHARPYUV_DEP_LIBRARIES} cpufeatures-webp)
-  set(WEBP_DEP_LIBRARIES ${WEBP_DEP_LIBRARIES} cpufeatures-webp)
-  set(cpufeatures_include_dir ${ANDROID_NDK}/sources/android/cpufeatures)
-  set(SHARPYUV_DEP_INCLUDE_DIRS ${SHARPYUV_DEP_INCLUDE_DIRS}
-                                ${cpufeatures_include_dir})
-  set(WEBP_DEP_INCLUDE_DIRS ${WEBP_DEP_INCLUDE_DIRS} ${cpufeatures_include_dir})
-  add_definitions(-DHAVE_CPU_FEATURES_H=1)
-  set(HAVE_CPU_FEATURES_H 1)
-else()
-  set(HAVE_CPU_FEATURES_H 0)
-endif()
-
-function(configure_pkg_config FILE)
-  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/${FILE}.in"
-                 "${CMAKE_CURRENT_BINARY_DIR}/${FILE}" @ONLY)
-
-  if(HAVE_MATH_LIBRARY)
-    # MSVC doesn't have libm
-    file(READ ${CMAKE_CURRENT_BINARY_DIR}/${FILE} data)
-    string(REPLACE "-lm" "" data ${data})
-    file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/${FILE} ${data})
-  endif()
-
-  install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${FILE}"
-          DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
-endfunction()
-
-# ##############################################################################
-# WebP source files. Read the Makefile.am to get the source files.
-
-# We expect the Makefiles to define the sources as defined in the first regex.
-# E.g.: libimagedec_la_SOURCES  = image_dec.c image_dec.h
-function(parse_Makefile_am FOLDER VAR SRC_REGEX)
-  file(READ ${FOLDER}/Makefile.am MAKEFILE_AM)
-  string(REGEX MATCHALL "${SRC_REGEX}_SOURCES[ ]*\\+?=[ ]+[0-9a-z\\._ ]*"
-               FILES_PER_LINE ${MAKEFILE_AM})
-  set(SRCS ${${VAR}})
-  foreach(FILES ${FILES_PER_LINE})
-    string(FIND ${FILES} "=" OFFSET)
-    math(EXPR OFFSET "${OFFSET} + 2")
-    string(SUBSTRING ${FILES} ${OFFSET} -1 FILES)
-    if(FILES)
-      string(REGEX MATCHALL "[0-9a-z\\._]+" FILES ${FILES})
-      foreach(FILE ${FILES})
-        list(APPEND SRCS ${FOLDER}/${FILE})
-      endforeach()
-    endif()
-  endforeach()
-  set(${VAR} ${SRCS} PARENT_SCOPE)
-endfunction()
-
-set(WEBP_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)
-parse_makefile_am(${WEBP_SRC_DIR}/dec "WEBP_DEC_SRCS" "")
-parse_makefile_am(${WEBP_SRC_DIR}/demux "WEBP_DEMUX_SRCS" "")
-parse_makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_COMMON_SRCS" "COMMON")
-parse_makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_ENC_SRCS" "ENC")
-parse_makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_ENC_SRCS" "dsp_[^ ]*")
-parse_makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_DEC_SRCS" "decode_[^ ]*")
-parse_makefile_am(${WEBP_SRC_DIR}/enc "WEBP_ENC_SRCS" "")
-parse_makefile_am(${WEBP_SRC_DIR}/utils "WEBP_UTILS_COMMON_SRCS" "COMMON")
-parse_makefile_am(${WEBP_SRC_DIR}/utils "WEBP_UTILS_ENC_SRCS" "ENC")
-parse_makefile_am(${WEBP_SRC_DIR}/utils "WEBP_UTILS_DEC_SRCS" "decode_[^ ]*")
-
-# Remove the files specific to SIMD we don't use.
-foreach(FILE ${WEBP_SIMD_FILES_NOT_TO_INCLUDE})
-  list(REMOVE_ITEM WEBP_DSP_ENC_SRCS ${FILE})
-  list(REMOVE_ITEM WEBP_DSP_DEC_SRCS ${FILE})
-endforeach()
-
-# Generate the config.h file.
-configure_file(${CMAKE_CURRENT_LIST_DIR}/cmake/config.h.in
-               ${CMAKE_CURRENT_BINARY_DIR}/src/webp/config.h @ONLY)
-add_definitions(-DHAVE_CONFIG_H)
-
-# Set the version numbers.
-macro(set_version FILE TARGET_NAME NAME_IN_MAKEFILE)
-  file(READ ${CMAKE_CURRENT_SOURCE_DIR}/${FILE} SOURCE_FILE)
-  string(REGEX MATCH
-               "${NAME_IN_MAKEFILE}_la_LDFLAGS[^\n]* -version-info [0-9:]+" TMP
-               ${SOURCE_FILE})
-  string(REGEX MATCH "[0-9:]+" TMP ${TMP})
-  string(REGEX REPLACE ":" " " LT_VERSION ${TMP})
-
-  # See the libtool docs for more information:
-  # https://www.gnu.org/software/libtool/manual/libtool.html#Updating-version-info
-  #
-  # c=<current>, a=<age>, r=<revision>
-  #
-  # libtool generates a .so file as .so.[c-a].a.r, while -version-info c:r:a is
-  # passed to libtool.
-  #
-  # We set FULL = [c-a].a.r and MAJOR = [c-a].
-  separate_arguments(LT_VERSION)
-  list(GET LT_VERSION 0 LT_CURRENT)
-  list(GET LT_VERSION 1 LT_REVISION)
-  list(GET LT_VERSION 2 LT_AGE)
-  math(EXPR LT_CURRENT_MINUS_AGE "${LT_CURRENT} - ${LT_AGE}")
-
-  set_target_properties(
-    ${TARGET_NAME}
-    PROPERTIES VERSION ${LT_CURRENT_MINUS_AGE}.${LT_AGE}.${LT_REVISION}
-               SOVERSION ${LT_CURRENT_MINUS_AGE})
-  if(APPLE)
-    # For compatibility, set MACHO_COMPATIBILITY_VERSION and
-    # MACHO_CURRENT_VERSION to match libtool. These properties were introduced
-    # in 3.17:
-    # https://cmake.org/cmake/help/latest/prop_tgt/MACHO_COMPATIBILITY_VERSION.html
-    math(EXPR LIBWEBP_MACHO_COMPATIBILITY_VERSION "${LT_CURRENT} + 1")
-    set_target_properties(
-      ${TARGET_NAME}
-      PROPERTIES MACHO_COMPATIBILITY_VERSION
-                 ${LIBWEBP_MACHO_COMPATIBILITY_VERSION}
-                 MACHO_CURRENT_VERSION
-                 ${LIBWEBP_MACHO_COMPATIBILITY_VERSION}.${LT_REVISION})
-  endif()
-endmacro()
-
-# ##############################################################################
-# Build the webpdecoder library.
-
-# Creates a source file with an unused stub function in $CMAKE_BINARY_DIR and
-# adds it to the specified target. Currently used only with Xcode.
-#
-# See also:
-# https://cmake.org/cmake/help/v3.18/command/add_library.html#object-libraries
-# "Some native build systems (such as Xcode) may not like targets that have only
-# object files, so consider adding at least one real source file to any target
-# that references $<TARGET_OBJECTS:objlib>."
-function(libwebp_add_stub_file TARGET)
-  set(stub_source_dir "${CMAKE_BINARY_DIR}")
-  set(stub_source_file "${stub_source_dir}/libwebp_${TARGET}_stub.c")
-  set(stub_source_code
-      "// Generated file. DO NOT EDIT!\n"
-      "// C source file created for target ${TARGET}.\n"
-      "void libwebp_${TARGET}_stub_function(void)\;\n"
-      "void libwebp_${TARGET}_stub_function(void) {}\n")
-  file(WRITE "${stub_source_file}" ${stub_source_code})
-
-  target_sources(${TARGET} PRIVATE ${stub_source_file})
-endfunction()
-
-parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/sharpyuv "WEBP_SHARPYUV_SRCS" "")
-add_library(sharpyuv ${WEBP_SHARPYUV_SRCS})
-target_link_libraries(sharpyuv ${SHARPYUV_DEP_LIBRARIES})
-set_version(sharpyuv/Makefile.am sharpyuv sharpyuv)
-target_include_directories(
-  sharpyuv PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}
-                   ${CMAKE_CURRENT_SOURCE_DIR}/src)
-set_target_properties(
-  sharpyuv
-  PROPERTIES PUBLIC_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/sharpyuv/sharpyuv.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/sharpyuv/sharpyuv_csp.h")
-configure_pkg_config("sharpyuv/libsharpyuv.pc")
-install(
-  TARGETS sharpyuv
-  EXPORT ${PROJECT_NAME}Targets
-  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/webp/sharpyuv
-  INCLUDES
-  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-  ${CMAKE_INSTALL_INCLUDEDIR}/webp
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-
-if(MSVC)
-  # avoid security warnings for e.g., fopen() used in the examples.
-  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-else()
-  add_compile_options(-Wall)
-endif()
-include_directories(${WEBP_DEP_INCLUDE_DIRS})
-add_library(webpdecode OBJECT ${WEBP_DEC_SRCS})
-target_include_directories(webpdecode PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
-                                              ${CMAKE_CURRENT_SOURCE_DIR})
-add_library(webpdspdecode OBJECT ${WEBP_DSP_COMMON_SRCS} ${WEBP_DSP_DEC_SRCS})
-target_include_directories(webpdspdecode PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
-                                                 ${CMAKE_CURRENT_SOURCE_DIR})
-add_library(webputilsdecode OBJECT ${WEBP_UTILS_COMMON_SRCS}
-                                   ${WEBP_UTILS_DEC_SRCS})
-target_include_directories(webputilsdecode PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
-                                                   ${CMAKE_CURRENT_SOURCE_DIR})
-add_library(
-  webpdecoder $<TARGET_OBJECTS:webpdecode> $<TARGET_OBJECTS:webpdspdecode>
-              $<TARGET_OBJECTS:webputilsdecode>)
-if(XCODE)
-  libwebp_add_stub_file(webpdecoder)
-endif()
-target_link_libraries(webpdecoder ${WEBP_DEP_LIBRARIES})
-target_include_directories(
-  webpdecoder PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}
-  INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
-set_target_properties(
-  webpdecoder
-  PROPERTIES PUBLIC_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h")
-
-configure_pkg_config("src/libwebpdecoder.pc")
-
-# Build the webp library.
-add_library(webpencode OBJECT ${WEBP_ENC_SRCS})
-target_include_directories(
-  webpencode PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}
-                     ${CMAKE_CURRENT_SOURCE_DIR}/src)
-add_library(webpdsp OBJECT ${WEBP_DSP_COMMON_SRCS} ${WEBP_DSP_DEC_SRCS}
-                           ${WEBP_DSP_ENC_SRCS})
-target_include_directories(webpdsp PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
-                                           ${CMAKE_CURRENT_SOURCE_DIR})
-add_library(webputils OBJECT ${WEBP_UTILS_COMMON_SRCS} ${WEBP_UTILS_DEC_SRCS}
-                             ${WEBP_UTILS_ENC_SRCS})
-target_include_directories(webputils PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
-                                             ${CMAKE_CURRENT_SOURCE_DIR})
-add_library(webp $<TARGET_OBJECTS:webpdecode> $<TARGET_OBJECTS:webpdsp>
-                 $<TARGET_OBJECTS:webpencode> $<TARGET_OBJECTS:webputils>)
-target_link_libraries(webp sharpyuv)
-if(XCODE)
-  libwebp_add_stub_file(webp)
-endif()
-target_link_libraries(webp ${WEBP_DEP_LIBRARIES})
-target_include_directories(
-  webp PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}
-  PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
-         $<INSTALL_INTERFACE:include>)
-set_target_properties(
-  webp
-  PROPERTIES PUBLIC_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/encode.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h")
-
-# Make sure the OBJECT libraries are built with position independent code (it is
-# not ON by default).
-set_target_properties(webpdecode webpdspdecode webputilsdecode webpencode
-                      webpdsp webputils PROPERTIES POSITION_INDEPENDENT_CODE ON)
-configure_pkg_config("src/libwebp.pc")
-
-# Build the webp demux library.
-add_library(webpdemux ${WEBP_DEMUX_SRCS})
-target_link_libraries(webpdemux webp)
-target_include_directories(
-  webpdemux PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}
-  PUBLIC $<INSTALL_INTERFACE:include>)
-set_target_properties(
-  webpdemux
-  PROPERTIES
-    PUBLIC_HEADER
-    "${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/demux.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux_types.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h")
-
-configure_pkg_config("src/demux/libwebpdemux.pc")
-
-set_version(src/Makefile.am webp webp)
-set_version(src/Makefile.am webpdecoder webpdecoder)
-set_version(src/demux/Makefile.am webpdemux webpdemux)
-file(READ ${CMAKE_CURRENT_SOURCE_DIR}/configure.ac CONFIGURE_FILE)
-string(REGEX MATCH "AC_INIT\\([^\n]*\\[[0-9\\.]+\\]" TMP ${CONFIGURE_FILE})
-string(REGEX MATCH "[0-9\\.]+" PROJECT_VERSION ${TMP})
-
-# Define the libraries to install.
-list(APPEND INSTALLED_LIBRARIES webpdecoder webp webpdemux)
-
-# Deal with SIMD. Change the compile flags for SIMD files we use.
-list(LENGTH WEBP_SIMD_FILES_TO_INCLUDE WEBP_SIMD_FILES_TO_INCLUDE_LENGTH)
-math(EXPR WEBP_SIMD_FILES_TO_INCLUDE_RANGE
-     "${WEBP_SIMD_FILES_TO_INCLUDE_LENGTH}-1")
-
-foreach(I_FILE RANGE ${WEBP_SIMD_FILES_TO_INCLUDE_RANGE})
-  list(GET WEBP_SIMD_FILES_TO_INCLUDE ${I_FILE} FILE)
-  list(GET WEBP_SIMD_FLAGS_TO_INCLUDE ${I_FILE} SIMD_COMPILE_FLAG)
-  set_source_files_properties(${FILE} PROPERTIES COMPILE_FLAGS
-                                                 ${SIMD_COMPILE_FLAG})
-endforeach()
-
-if(NOT WEBP_BUILD_LIBWEBPMUX)
-  set(WEBP_BUILD_GIF2WEBP OFF)
-  set(WEBP_BUILD_IMG2WEBP OFF)
-  set(WEBP_BUILD_WEBPMUX OFF)
-endif()
-
-if(WEBP_BUILD_GIF2WEBP AND NOT GIF_FOUND)
-  set(WEBP_BUILD_GIF2WEBP OFF)
-endif()
-
-if(WEBP_BUILD_ANIM_UTILS AND NOT GIF_FOUND)
-  set(WEBP_BUILD_ANIM_UTILS OFF)
-endif()
-
-# Build the executables if asked for.
-if(WEBP_BUILD_ANIM_UTILS
-   OR WEBP_BUILD_CWEBP
-   OR WEBP_BUILD_DWEBP
-   OR WEBP_BUILD_GIF2WEBP
-   OR WEBP_BUILD_IMG2WEBP
-   OR WEBP_BUILD_VWEBP
-   OR WEBP_BUILD_WEBPMUX
-   OR WEBP_BUILD_WEBPINFO)
-  # Example utility library.
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "EXAMPLEUTIL_SRCS"
-                    "example_util_[^ ]*")
-  list(APPEND EXAMPLEUTIL_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/examples/stopwatch.h)
-  add_library(exampleutil STATIC ${EXAMPLEUTIL_SRCS})
-  target_include_directories(
-    exampleutil PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>)
-
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/imageio "IMAGEIOUTILS_SRCS"
-                    "imageio_util_[^ ]*")
-  add_library(imageioutil STATIC ${IMAGEIOUTILS_SRCS})
-  target_link_libraries(imageioutil webp)
-  target_link_libraries(exampleutil imageioutil)
-
-  # Image-decoding utility library.
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/imageio "IMAGEDEC_SRCS"
-                    "imagedec_[^ ]*")
-  add_library(imagedec STATIC ${IMAGEDEC_SRCS})
-  target_link_libraries(imagedec imageioutil webpdemux webp
-                        ${WEBP_DEP_IMG_LIBRARIES})
-
-  # Image-encoding utility library.
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/imageio "IMAGEENC_SRCS"
-                    "imageenc_[^ ]*")
-  add_library(imageenc STATIC ${IMAGEENC_SRCS})
-  target_link_libraries(imageenc imageioutil webp)
-
-  set_property(
-    TARGET exampleutil imageioutil imagedec imageenc
-    PROPERTY INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/src
-             ${CMAKE_CURRENT_BINARY_DIR}/src)
-endif()
-
-if(WEBP_BUILD_DWEBP)
-  # dwebp
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "DWEBP_SRCS" "dwebp")
-  add_executable(dwebp ${DWEBP_SRCS})
-  target_link_libraries(dwebp exampleutil imagedec imageenc)
-  target_include_directories(dwebp PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src)
-  install(TARGETS dwebp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-endif()
-
-if(WEBP_BUILD_CWEBP)
-  # cwebp
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "CWEBP_SRCS" "cwebp")
-  add_executable(cwebp ${CWEBP_SRCS})
-  target_link_libraries(cwebp exampleutil imagedec webp)
-  target_include_directories(cwebp PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src
-                                           ${CMAKE_CURRENT_SOURCE_DIR})
-  install(TARGETS cwebp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-endif()
-
-if(WEBP_BUILD_LIBWEBPMUX)
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/src/mux "WEBP_MUX_SRCS" "")
-  add_library(libwebpmux ${WEBP_MUX_SRCS})
-  target_link_libraries(libwebpmux webp)
-  target_include_directories(libwebpmux PRIVATE ${CMAKE_CURRENT_BINARY_DIR}
-                                                ${CMAKE_CURRENT_SOURCE_DIR})
-  set_version(src/mux/Makefile.am libwebpmux webpmux)
-  set_target_properties(
-    libwebpmux
-    PROPERTIES PUBLIC_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux_types.h;\
-${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h;")
-  set_target_properties(libwebpmux PROPERTIES OUTPUT_NAME webpmux)
-  list(APPEND INSTALLED_LIBRARIES libwebpmux)
-  configure_pkg_config("src/mux/libwebpmux.pc")
-endif()
-
-if(WEBP_BUILD_GIF2WEBP)
-  # gif2webp
-  include_directories(${WEBP_DEP_GIF_INCLUDE_DIRS})
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "GIF2WEBP_SRCS"
-                    "gif2webp")
-  add_executable(gif2webp ${GIF2WEBP_SRCS})
-  target_link_libraries(gif2webp exampleutil imageioutil webp libwebpmux
-                        ${WEBP_DEP_GIF_LIBRARIES})
-  target_include_directories(gif2webp PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src)
-  install(TARGETS gif2webp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-endif()
-
-if(WEBP_BUILD_IMG2WEBP)
-  # img2webp
-  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "IMG2WEBP_SRCS"
-                    "img2webp")
-  add_executable(img2webp ${IMG2WEBP_SRCS})
-  target_link_libraries(img2webp exampleutil imagedec imageioutil webp
-                        libwebpmux)
-  target_include_directories(img2webp PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src
-                                              ${CMAKE_CURRENT_SOURCE_DIR})
-  install(TARGETS img2webp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-endif()
-
-if(WEBP_BUILD_VWEBP)
-  # vwebp
-  find_package(GLUT)
-  if(GLUT_FOUND)
-    include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})
-    parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "VWEBP_SRCS" "vwebp")
-    add_executable(vwebp ${VWEBP_SRCS})
-    target_link_libraries(
-      vwebp
-      ${OPENGL_LIBRARIES}
-      exampleutil
-      GLUT::GLUT
-      imageioutil
-      webp
-      webpdemux)
-    target_include_directories(
-      vwebp PRIVATE ${GLUT_INCLUDE_DIR} ${CMAKE_CURRENT_BINARY_DIR}/src
-                    ${OPENGL_INCLUDE_DIR})
-    install(TARGETS vwebp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-    if(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
-      check_c_compiler_flag("-Wno-deprecated-declarations" HAS_NO_DEPRECATED)
-      if(HAS_NO_DEPRECATED)
-        target_compile_options(vwebp PRIVATE "-Wno-deprecated-declarations")
-      endif()
-    endif()
-  endif()
-endif()
-
-if(WEBP_BUILD_WEBPINFO)
-  # webpinfo
-  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "WEBPINFO_SRCS"
-                    "webpinfo")
-  add_executable(webpinfo ${WEBPINFO_SRCS})
-  target_link_libraries(webpinfo exampleutil imageioutil)
-  target_include_directories(webpinfo PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src
-                                              ${CMAKE_CURRENT_SOURCE_DIR}/src)
-  install(TARGETS webpinfo RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-endif()
-
-if(WEBP_BUILD_WEBPMUX)
-  # webpmux
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "WEBPMUX_SRCS"
-                    "webpmux")
-  add_executable(webpmux ${WEBPMUX_SRCS})
-  target_link_libraries(webpmux exampleutil imageioutil libwebpmux webp)
-  target_include_directories(webpmux PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src)
-  install(TARGETS webpmux RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-endif()
-
-if(WEBP_BUILD_EXTRAS)
-  set(EXTRAS_MAKEFILE "${CMAKE_CURRENT_SOURCE_DIR}/extras")
-  parse_makefile_am(${EXTRAS_MAKEFILE} "WEBP_EXTRAS_SRCS" "libwebpextras_la")
-  parse_makefile_am(${EXTRAS_MAKEFILE} "GET_DISTO_SRCS" "get_disto")
-  parse_makefile_am(${EXTRAS_MAKEFILE} "WEBP_QUALITY_SRCS" "webp_quality")
-  parse_makefile_am(${EXTRAS_MAKEFILE} "VWEBP_SDL_SRCS" "vwebp_sdl")
-
-  # libextras
-  add_library(extras STATIC ${WEBP_EXTRAS_SRCS})
-  target_include_directories(
-    extras PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}
-                   ${CMAKE_CURRENT_SOURCE_DIR}/src)
-
-  # get_disto
-  add_executable(get_disto ${GET_DISTO_SRCS})
-  target_link_libraries(get_disto imagedec)
-  target_include_directories(get_disto PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
-                                               ${CMAKE_CURRENT_BINARY_DIR}/src)
-
-  # webp_quality
-  add_executable(webp_quality ${WEBP_QUALITY_SRCS})
-  target_link_libraries(webp_quality exampleutil imagedec extras)
-  target_include_directories(webp_quality PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
-                                                  ${CMAKE_CURRENT_BINARY_DIR})
-
-  # vwebp_sdl
-  find_package(SDL)
-  if(WEBP_BUILD_VWEBP AND SDL_FOUND)
-    add_executable(vwebp_sdl ${VWEBP_SDL_SRCS})
-    target_link_libraries(vwebp_sdl ${SDL_LIBRARY} imageioutil webp)
-    target_include_directories(
-      vwebp_sdl PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}
-                        ${CMAKE_CURRENT_BINARY_DIR}/src ${SDL_INCLUDE_DIR})
-    set(WEBP_HAVE_SDL 1)
-    target_compile_definitions(vwebp_sdl PUBLIC WEBP_HAVE_SDL)
-  endif()
-endif()
-
-if(WEBP_BUILD_WEBP_JS)
-  # The default stack size changed from 5MB to 64KB in 3.1.27. See
-  # https://crbug.com/webp/614.
-  if(EMSCRIPTEN_VERSION VERSION_GREATER_EQUAL "3.1.27")
-    # TOTAL_STACK size was renamed to STACK_SIZE in 3.1.27. The old name was
-    # kept for compatibility, but prefer the new one in case it is removed in
-    # the future.
-    set(emscripten_stack_size "-sSTACK_SIZE=5MB")
-  else()
-    set(emscripten_stack_size "-sTOTAL_STACK=5MB")
-  endif()
-  # wasm2js does not support SIMD.
-  if(NOT WEBP_ENABLE_SIMD)
-    # JavaScript version
-    add_executable(webp_js ${CMAKE_CURRENT_SOURCE_DIR}/extras/webp_to_sdl.c)
-    target_link_libraries(webp_js webpdecoder SDL)
-    target_include_directories(webp_js PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
-    set(WEBP_HAVE_SDL 1)
-    set_target_properties(
-      webp_js
-      PROPERTIES LINK_FLAGS "-sWASM=0 ${emscripten_stack_size} \
-         -sEXPORTED_FUNCTIONS=_WebPToSDL -sINVOKE_RUN=0 \
-         -sEXPORTED_RUNTIME_METHODS=cwrap")
-    set_target_properties(webp_js PROPERTIES OUTPUT_NAME webp)
-    target_compile_definitions(webp_js PUBLIC EMSCRIPTEN WEBP_HAVE_SDL)
-  endif()
-
-  # WASM version
-  add_executable(webp_wasm ${CMAKE_CURRENT_SOURCE_DIR}/extras/webp_to_sdl.c)
-  target_link_libraries(webp_wasm webpdecoder SDL)
-  target_include_directories(webp_wasm PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
-  set_target_properties(
-    webp_wasm
-    PROPERTIES LINK_FLAGS "-sWASM=1 ${emscripten_stack_size} \
-       -sEXPORTED_FUNCTIONS=_WebPToSDL -sINVOKE_RUN=0 \
-       -sEXPORTED_RUNTIME_METHODS=cwrap")
-  target_compile_definitions(webp_wasm PUBLIC EMSCRIPTEN WEBP_HAVE_SDL)
-
-  target_compile_definitions(webpdspdecode PUBLIC EMSCRIPTEN)
-endif()
-
-if(WEBP_BUILD_ANIM_UTILS)
-  # anim_diff
-  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS} ${WEBP_DEP_GIF_INCLUDE_DIRS})
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "ANIM_DIFF_SRCS"
-                    "anim_diff")
-  add_executable(anim_diff ${ANIM_DIFF_SRCS})
-  target_link_libraries(
-    anim_diff
-    exampleutil
-    imagedec
-    imageenc
-    imageioutil
-    webp
-    webpdemux
-    ${WEBP_DEP_GIF_LIBRARIES})
-  target_include_directories(anim_diff PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src)
-
-  # anim_dump
-  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS} ${WEBP_DEP_GIF_INCLUDE_DIRS})
-  parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "ANIM_DUMP_SRCS"
-                    "anim_dump")
-  add_executable(anim_dump ${ANIM_DUMP_SRCS})
-  target_link_libraries(
-    anim_dump
-    exampleutil
-    imagedec
-    imageenc
-    imageioutil
-    webp
-    webpdemux
-    ${WEBP_DEP_GIF_LIBRARIES})
-  target_include_directories(anim_dump PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src)
-endif()
-
-# Install the different headers and libraries.
-install(
-  TARGETS ${INSTALLED_LIBRARIES}
-  EXPORT ${PROJECT_NAME}Targets
-  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/webp
-  INCLUDES
-  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-set(ConfigPackageLocation ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}/cmake/)
-install(EXPORT ${PROJECT_NAME}Targets NAMESPACE ${PROJECT_NAME}::
-        DESTINATION ${ConfigPackageLocation})
-
-# Create the CMake version file.
-include(CMakePackageConfigHelpers)
-write_basic_package_version_file(
-  "${CMAKE_CURRENT_BINARY_DIR}/WebPConfigVersion.cmake"
-  VERSION ${PACKAGE_VERSION} COMPATIBILITY AnyNewerVersion)
-
-# Create the Config file.
-include(CMakePackageConfigHelpers)
-# Fix libwebpmux reference. The target name libwebpmux is used for compatibility
-# purposes, but the library mentioned in WebPConfig.cmake should be the
-# unprefixed version. Note string(...) can be replaced with list(TRANSFORM ...)
-# if cmake_minimum_required is >= 3.12.
-string(REGEX REPLACE "libwebpmux" "webpmux" INSTALLED_LIBRARIES
-                     "${INSTALLED_LIBRARIES}")
-
-if(MSVC)
-  # For compatibility with nmake, MSVC builds use a custom prefix (lib) that
-  # needs to be included in the library name.
-  string(REGEX REPLACE "[A-Za-z0-9_]+" "${CMAKE_STATIC_LIBRARY_PREFIX}\\0"
-                       INSTALLED_LIBRARIES "${INSTALLED_LIBRARIES}")
-endif()
-
-configure_package_config_file(
-  ${CMAKE_CURRENT_SOURCE_DIR}/cmake/WebPConfig.cmake.in
-  ${CMAKE_CURRENT_BINARY_DIR}/WebPConfig.cmake
-  INSTALL_DESTINATION ${ConfigPackageLocation}
-  PATH_VARS CMAKE_INSTALL_INCLUDEDIR)
-
-# Install the generated CMake files.
-install(FILES "${CMAKE_CURRENT_BINARY_DIR}/WebPConfigVersion.cmake"
-              "${CMAKE_CURRENT_BINARY_DIR}/WebPConfig.cmake"
-        DESTINATION ${ConfigPackageLocation})
-
-# Install the man pages.
-set(MAN_PAGES
-    cwebp.1
-    dwebp.1
-    gif2webp.1
-    img2webp.1
-    vwebp.1
-    webpmux.1
-    webpinfo.1)
-set(EXEC_BUILDS
-    "CWEBP"
-    "DWEBP"
-    "GIF2WEBP"
-    "IMG2WEBP"
-    "VWEBP"
-    "WEBPMUX"
-    "WEBPINFO")
-list(LENGTH MAN_PAGES MAN_PAGES_LENGTH)
-math(EXPR MAN_PAGES_RANGE "${MAN_PAGES_LENGTH} - 1")
-
-foreach(I_MAN RANGE ${MAN_PAGES_RANGE})
-  list(GET EXEC_BUILDS ${I_MAN} EXEC_BUILD)
-  if(WEBP_BUILD_${EXEC_BUILD})
-    list(GET MAN_PAGES ${I_MAN} MAN_PAGE)
-    install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/man/${MAN_PAGE}
-            DESTINATION ${CMAKE_INSTALL_MANDIR}/man1 COMPONENT doc)
-  endif()
-endforeach()

external/libwebp/libwebp/CONTRIBUTING.md

@@ -1,78 +0,0 @@
-# How to Contribute
-
-We'd love to accept your patches and contributions to this project. There are
-just a few small guidelines you need to follow.
-
-## Contributor License Agreement
-
-Contributions to this project must be accompanied by a Contributor License
-Agreement. You (or your employer) retain the copyright to your contribution;
-this simply gives us permission to use and redistribute your contributions as
-part of the project. Head over to <https://cla.developers.google.com/> to see
-your current agreements on file or to sign a new one.
-
-You generally only need to submit a CLA once, so if you've already submitted one
-(even if it was for a different project), you probably don't need to do it
-again.
-
-## Code reviews
-
-All submissions, including submissions by project members, require review. We
-use a [Gerrit](https://www.gerritcodereview.com) instance hosted at
-https://chromium-review.googlesource.com for this purpose.
-
-## Sending patches
-
-The basic git workflow for modifying libwebp code and sending for review is:
-
-1.  Get the latest version of the repository locally:
-
-    ```sh
-    git clone https://chromium.googlesource.com/webm/libwebp && cd libwebp
-    ```
-
-2.  Copy the commit-msg script into ./git/hooks (this will add an ID to all of
-    your commits):
-
-    ```sh
-    curl -Lo .git/hooks/commit-msg https://chromium-review.googlesource.com/tools/hooks/commit-msg && chmod u+x .git/hooks/commit-msg
-    ```
-
-3.  Modify the local copy of libwebp. Make sure the code
-    [builds successfully](https://chromium.googlesource.com/webm/libwebp/+/HEAD/doc/building.md#cmake).
-
-4.  Choose a short and representative commit message:
-
-    ```sh
-    git commit -a -m "Set commit message here"
-    ```
-
-5.  Send the patch for review:
-
-    ```sh
-    git push https://chromium-review.googlesource.com/webm/libwebp HEAD:refs/for/main
-    ```
-
-    Go to https://chromium-review.googlesource.com to view your patch and
-    request a review from the maintainers.
-
-See the
-[WebM Project page](https://www.webmproject.org/code/contribute/submitting-patches/)
-for additional details.
-
-## Code Style
-
-The C code style is based on the
-[Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html) and
-`clang-format --style=Google`, though this project doesn't use the tool to
-enforce the formatting.
-
-CMake files are formatted with
-[cmake-format](https://cmake-format.readthedocs.io/en/latest/). `cmake-format
--i` can be used to format individual files, it will use the settings from
-`.cmake-format.py`.
-
-## Community Guidelines
-
-This project follows
-[Google's Open Source Community Guidelines](https://opensource.google.com/conduct/).

external/libwebp/libwebp/COPYING

@@ -1,30 +0,0 @@
-Copyright (c) 2010, Google Inc. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-  * Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-  * Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-  * Neither the name of Google nor the names of its contributors may
-    be used to endorse or promote products derived from this software
-    without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-

external/libwebp/libwebp/Makefile.am

@@ -1,9 +0,0 @@
-ACLOCAL_AMFLAGS = -I m4
-SUBDIRS = sharpyuv src imageio man
-EXTRA_DIST = COPYING autogen.sh
-
-if BUILD_EXTRAS
-  SUBDIRS += extras
-endif
-
-SUBDIRS += examples

external/libwebp/libwebp/Makefile.vc

@@ -1,528 +0,0 @@
-#
-# Stem for static libs and DLLs
-#
-LIBWEBPDECODER_BASENAME = libwebpdecoder
-LIBWEBP_BASENAME = libwebp
-LIBWEBPMUX_BASENAME = libwebpmux
-LIBWEBPDEMUX_BASENAME = libwebpdemux
-LIBSHARPYUV_BASENAME = libsharpyuv
-
-!IFNDEF ARCH
-!IF ! [ cl 2>&1 | find "x86" > NUL ]
-ARCH = x86
-!ELSE IF ! [ cl 2>&1 | find "x64" > NUL ]
-ARCH = x64
-!ELSE IF ! [ cl 2>&1 | find "ARM" > NUL ]
-ARCH = ARM
-!ELSE
-!ERROR Unable to auto-detect toolchain architecture! \
-If cl.exe is in your PATH rerun nmake with ARCH=<arch>.
-!ENDIF
-!ENDIF
-
-!IF "$(ARCH)" == "x86"
-PLATFORM_LDFLAGS = /SAFESEH
-!ENDIF
-
-#############################################################
-## Nothing more to do below this line!
-
-NOLOGO     = /nologo
-CCNODBG    = cl.exe $(NOLOGO) /O2 /DNDEBUG
-CCDEBUG    = cl.exe $(NOLOGO) /Od /Zi /D_DEBUG /RTC1
-CFLAGS     = /I. /Isrc $(NOLOGO) /W3 /EHsc /c
-CFLAGS     = $(CFLAGS) /DWIN32 /D_CRT_SECURE_NO_WARNINGS /DWIN32_LEAN_AND_MEAN
-LDFLAGS    = /LARGEADDRESSAWARE /MANIFEST:EMBED /NXCOMPAT /DYNAMICBASE
-LDFLAGS    = $(LDFLAGS) $(PLATFORM_LDFLAGS)
-LNKDLL     = link.exe /DLL $(NOLOGO)
-LNKEXE     = link.exe $(NOLOGO)
-LNKLIB     = lib.exe $(NOLOGO)
-RCNODBG    = rc.exe $(NOLOGO) /l"0x0409"  # 0x409 = U.S. English
-RCDEBUG    = $(RCNODBG) /D_DEBUG
-
-!IF "$(ARCH)" == "ARM"
-CFLAGS = $(CFLAGS) /DWINAPI_FAMILY=WINAPI_FAMILY_PHONE_APP /DWEBP_USE_THREAD
-!ELSE
-CFLAGS = $(CFLAGS) /DHAVE_WINCODEC_H /DWEBP_USE_THREAD
-!ENDIF
-
-CFGSET     = FALSE
-!IF "$(OBJDIR)" == ""
-OUTDIR = ..\obj\
-!ELSE
-OUTDIR = $(OBJDIR)
-!ENDIF
-
-##############################################################
-# Runtime library configuration
-!IF "$(RTLIBCFG)" == "static"
-RTLIB  = /MT
-RTLIBD = /MTd
-!ELSE IF "$(RTLIBCFG)" == "legacy"
-RTLIBCFG = static
-RTLIB  = /MT
-RTLIBD = /MTd
-CFLAGS = $(CFLAGS) /GS- /arch:IA32
-!ELSE
-RTLIB   = /MD
-RTLIBD  = /MDd
-!ENDIF
-DIRBASE = $(OUTDIR)\$(CFG)\$(ARCH)
-DIROBJ = $(DIRBASE)\obj
-DIRLIB = $(DIRBASE)\lib
-DIRINC = $(DIRBASE)\include
-DIRBIN = $(DIRBASE)\bin
-LIBWEBP_PDBNAME = $(DIROBJ)\$(LIBWEBP_BASENAME).pdb
-OUTPUT_DIRS = $(DIRBIN) $(DIRINC) $(DIRLIB) \
-              $(DIROBJ)\dec \
-              $(DIROBJ)\demux \
-              $(DIROBJ)\dsp \
-              $(DIROBJ)\enc \
-              $(DIROBJ)\examples \
-              $(DIROBJ)\extras \
-              $(DIROBJ)\imageio \
-              $(DIROBJ)\mux \
-              $(DIROBJ)\sharpyuv \
-              $(DIROBJ)\utils \
-
-# Target configuration
-!IF "$(CFG)" == "release-static"
-CC             = $(CCNODBG)
-STATICLIBBUILD = TRUE
-!ELSE IF "$(CFG)" == "debug-static"
-CC             = $(CCDEBUG)
-RTLIB          = $(RTLIBD)
-STATICLIBBUILD = TRUE
-LIBWEBPDECODER_BASENAME = $(LIBWEBPDECODER_BASENAME)_debug
-LIBWEBP_BASENAME = $(LIBWEBP_BASENAME)_debug
-LIBWEBPMUX_BASENAME = $(LIBWEBPMUX_BASENAME)_debug
-LIBWEBPDEMUX_BASENAME = $(LIBWEBPDEMUX_BASENAME)_debug
-LIBSHARPYUV_BASENAME = $(LIBSHARPYUV_BASENAME)_debug
-!ELSE IF "$(CFG)" == "release-dynamic"
-CC        = $(CCNODBG)
-RC        = $(RCNODBG)
-DLLBUILD  = TRUE
-!ELSE IF "$(CFG)" == "debug-dynamic"
-CC        = $(CCDEBUG)
-RC        = $(RCDEBUG)
-RTLIB     = $(RTLIBD)
-DLLBUILD  = TRUE
-LIBWEBPDECODER_BASENAME = $(LIBWEBPDECODER_BASENAME)_debug
-LIBWEBP_BASENAME = $(LIBWEBP_BASENAME)_debug
-LIBWEBPMUX_BASENAME = $(LIBWEBPMUX_BASENAME)_debug
-LIBWEBPDEMUX_BASENAME = $(LIBWEBPDEMUX_BASENAME)_debug
-LIBSHARPYUV_BASENAME = $(LIBSHARPYUV_BASENAME)_debug
-!ENDIF
-
-!IF "$(STATICLIBBUILD)" == "TRUE"
-CC     = $(CC) $(RTLIB)
-CFGSET = TRUE
-LIBWEBPDECODER = $(DIRLIB)\$(LIBWEBPDECODER_BASENAME).lib
-LIBWEBP = $(DIRLIB)\$(LIBWEBP_BASENAME).lib
-LIBWEBPMUX = $(DIRLIB)\$(LIBWEBPMUX_BASENAME).lib
-LIBWEBPDEMUX = $(DIRLIB)\$(LIBWEBPDEMUX_BASENAME).lib
-LIBSHARPYUV = $(DIRLIB)\$(LIBSHARPYUV_BASENAME).lib
-!ELSE IF "$(DLLBUILD)" == "TRUE"
-CC     = $(CC) /I$(DIROBJ) $(RTLIB) /DWEBP_DLL
-LIBWEBPDECODER = $(DIRLIB)\$(LIBWEBPDECODER_BASENAME)_dll.lib
-LIBWEBP = $(DIRLIB)\$(LIBWEBP_BASENAME)_dll.lib
-LIBWEBPMUX = $(DIRLIB)\$(LIBWEBPMUX_BASENAME)_dll.lib
-LIBWEBPDEMUX = $(DIRLIB)\$(LIBWEBPDEMUX_BASENAME)_dll.lib
-LIBSHARPYUV = $(DIRLIB)\$(LIBSHARPYUV_BASENAME)_dll.lib
-LIBWEBP_PDBNAME = $(DIROBJ)\$(LIBWEBP_BASENAME)_dll.pdb
-CFGSET = TRUE
-!ENDIF
-
-!IF "$(UNICODE)" == "1"
-CFLAGS = $(CFLAGS) /D_UNICODE /DUNICODE
-!ENDIF
-
-#######################
-# Usage
-#
-!IF "$(CFGSET)" == "FALSE"
-!MESSAGE Usage: nmake /f Makefile.vc [CFG=<config>]
-!MESSAGE .          [OBJDIR=<path>] [RTLIBCFG=<rtlib>] [UNICODE=1] [<target>]
-!MESSAGE
-!MESSAGE where <config> is one of:
-!MESSAGE -  release-static                - release static library
-!MESSAGE -  debug-static                  - debug static library
-!MESSAGE -  release-dynamic               - release dynamic link library (DLL)
-!MESSAGE -  debug-dynamic                 - debug dynamic link library (DLL)
-!MESSAGE
-!MESSAGE <target> may be:
-!MESSAGE -  clean                         - perform a clean for CFG
-!MESSAGE -  experimental                  - build CFG with experimental
-!MESSAGE .                                  features enabled.
-!MESSAGE - (empty)                        - build libwebp-based targets for CFG
-!MESSAGE - all                            - build (de)mux-based targets for CFG
-!MESSAGE - gif2webp                       - requires libgif & >= VS2013
-!MESSAGE - anim_diff                      - requires libgif & >= VS2013
-!MESSAGE - anim_dump
-!MESSAGE
-!MESSAGE RTLIBCFG controls the runtime library linkage - 'static' or 'dynamic'.
-!MESSAGE   'legacy' will produce a Windows 2000 compatible library.
-!MESSAGE OBJDIR is the path where you like to build (obj, bins, etc.),
-!MESSAGE   defaults to ..\obj
-
-!IF "$(CFG)" != ""
-!MESSAGE
-!ERROR please choose a valid configuration instead of "$(CFG)"
-!ENDIF
-!ENDIF
-
-#######################
-# Rules
-#
-!IF "$(CFGSET)" == "TRUE"
-# A config was provided, so the library can be built.
-#
-
-SHARPYUV_OBJS = \
-    $(DIROBJ)\sharpyuv\sharpyuv.obj \
-    $(DIROBJ)\sharpyuv\sharpyuv_cpu.obj \
-    $(DIROBJ)\sharpyuv\sharpyuv_csp.obj \
-    $(DIROBJ)\sharpyuv\sharpyuv_dsp.obj \
-    $(DIROBJ)\sharpyuv\sharpyuv_gamma.obj \
-    $(DIROBJ)\sharpyuv\sharpyuv_neon.obj \
-    $(DIROBJ)\sharpyuv\sharpyuv_sse2.obj \
-
-DEC_OBJS = \
-    $(DIROBJ)\dec\alpha_dec.obj \
-    $(DIROBJ)\dec\buffer_dec.obj \
-    $(DIROBJ)\dec\frame_dec.obj \
-    $(DIROBJ)\dec\idec_dec.obj \
-    $(DIROBJ)\dec\io_dec.obj \
-    $(DIROBJ)\dec\quant_dec.obj \
-    $(DIROBJ)\dec\tree_dec.obj \
-    $(DIROBJ)\dec\vp8_dec.obj \
-    $(DIROBJ)\dec\vp8l_dec.obj \
-    $(DIROBJ)\dec\webp_dec.obj \
-
-DEMUX_OBJS = \
-    $(DIROBJ)\demux\anim_decode.obj \
-    $(DIROBJ)\demux\demux.obj \
-
-DSP_DEC_OBJS = \
-    $(DIROBJ)\dsp\alpha_processing.obj \
-    $(DIROBJ)\dsp\alpha_processing_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\alpha_processing_neon.obj \
-    $(DIROBJ)\dsp\alpha_processing_sse2.obj \
-    $(DIROBJ)\dsp\alpha_processing_sse41.obj \
-    $(DIROBJ)\dsp\cpu.obj \
-    $(DIROBJ)\dsp\dec.obj \
-    $(DIROBJ)\dsp\dec_clip_tables.obj \
-    $(DIROBJ)\dsp\dec_mips32.obj \
-    $(DIROBJ)\dsp\dec_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\dec_msa.obj \
-    $(DIROBJ)\dsp\dec_neon.obj \
-    $(DIROBJ)\dsp\dec_sse2.obj \
-    $(DIROBJ)\dsp\dec_sse41.obj \
-    $(DIROBJ)\dsp\filters.obj \
-    $(DIROBJ)\dsp\filters_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\filters_msa.obj \
-    $(DIROBJ)\dsp\filters_neon.obj \
-    $(DIROBJ)\dsp\filters_sse2.obj \
-    $(DIROBJ)\dsp\lossless.obj \
-    $(DIROBJ)\dsp\lossless_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\lossless_msa.obj \
-    $(DIROBJ)\dsp\lossless_neon.obj \
-    $(DIROBJ)\dsp\lossless_sse2.obj \
-    $(DIROBJ)\dsp\lossless_sse41.obj \
-    $(DIROBJ)\dsp\rescaler.obj \
-    $(DIROBJ)\dsp\rescaler_mips32.obj \
-    $(DIROBJ)\dsp\rescaler_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\rescaler_msa.obj \
-    $(DIROBJ)\dsp\rescaler_neon.obj \
-    $(DIROBJ)\dsp\rescaler_sse2.obj \
-    $(DIROBJ)\dsp\upsampling.obj \
-    $(DIROBJ)\dsp\upsampling_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\upsampling_msa.obj \
-    $(DIROBJ)\dsp\upsampling_neon.obj \
-    $(DIROBJ)\dsp\upsampling_sse2.obj \
-    $(DIROBJ)\dsp\upsampling_sse41.obj \
-    $(DIROBJ)\dsp\yuv.obj \
-    $(DIROBJ)\dsp\yuv_mips32.obj \
-    $(DIROBJ)\dsp\yuv_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\yuv_neon.obj \
-    $(DIROBJ)\dsp\yuv_sse2.obj \
-    $(DIROBJ)\dsp\yuv_sse41.obj \
-
-DSP_ENC_OBJS = \
-    $(DIROBJ)\dsp\cost.obj \
-    $(DIROBJ)\dsp\cost_mips32.obj \
-    $(DIROBJ)\dsp\cost_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\cost_neon.obj \
-    $(DIROBJ)\dsp\cost_sse2.obj \
-    $(DIROBJ)\dsp\enc.obj \
-    $(DIROBJ)\dsp\enc_mips32.obj \
-    $(DIROBJ)\dsp\enc_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\enc_msa.obj \
-    $(DIROBJ)\dsp\enc_neon.obj \
-    $(DIROBJ)\dsp\enc_sse2.obj \
-    $(DIROBJ)\dsp\enc_sse41.obj \
-    $(DIROBJ)\dsp\lossless_enc.obj \
-    $(DIROBJ)\dsp\lossless_enc_mips32.obj \
-    $(DIROBJ)\dsp\lossless_enc_mips_dsp_r2.obj \
-    $(DIROBJ)\dsp\lossless_enc_msa.obj \
-    $(DIROBJ)\dsp\lossless_enc_neon.obj \
-    $(DIROBJ)\dsp\lossless_enc_sse2.obj \
-    $(DIROBJ)\dsp\lossless_enc_sse41.obj \
-    $(DIROBJ)\dsp\ssim.obj \
-    $(DIROBJ)\dsp\ssim_sse2.obj \
-
-EX_ANIM_UTIL_OBJS = \
-    $(DIROBJ)\examples\anim_util.obj \
-
-IMAGEIO_DEC_OBJS = \
-    $(DIROBJ)\imageio\image_dec.obj \
-    $(DIROBJ)\imageio\jpegdec.obj \
-    $(DIROBJ)\imageio\metadata.obj \
-    $(DIROBJ)\imageio\pngdec.obj \
-    $(DIROBJ)\imageio\pnmdec.obj \
-    $(DIROBJ)\imageio\tiffdec.obj \
-    $(DIROBJ)\imageio\webpdec.obj \
-    $(DIROBJ)\imageio\wicdec.obj \
-
-IMAGEIO_ENC_OBJS = \
-    $(DIROBJ)\imageio\image_enc.obj \
-
-EX_GIF_DEC_OBJS = \
-    $(DIROBJ)\examples\gifdec.obj \
-
-EX_UTIL_OBJS = \
-    $(DIROBJ)\examples\example_util.obj \
-
-ENC_OBJS = \
-    $(DIROBJ)\enc\alpha_enc.obj \
-    $(DIROBJ)\enc\analysis_enc.obj \
-    $(DIROBJ)\enc\backward_references_cost_enc.obj \
-    $(DIROBJ)\enc\backward_references_enc.obj \
-    $(DIROBJ)\enc\config_enc.obj \
-    $(DIROBJ)\enc\cost_enc.obj \
-    $(DIROBJ)\enc\filter_enc.obj \
-    $(DIROBJ)\enc\frame_enc.obj \
-    $(DIROBJ)\enc\histogram_enc.obj \
-    $(DIROBJ)\enc\iterator_enc.obj \
-    $(DIROBJ)\enc\near_lossless_enc.obj \
-    $(DIROBJ)\enc\picture_enc.obj \
-    $(DIROBJ)\enc\picture_csp_enc.obj \
-    $(DIROBJ)\enc\picture_psnr_enc.obj \
-    $(DIROBJ)\enc\picture_rescale_enc.obj \
-    $(DIROBJ)\enc\picture_tools_enc.obj \
-    $(DIROBJ)\enc\predictor_enc.obj \
-    $(DIROBJ)\enc\quant_enc.obj \
-    $(DIROBJ)\enc\syntax_enc.obj \
-    $(DIROBJ)\enc\token_enc.obj \
-    $(DIROBJ)\enc\tree_enc.obj \
-    $(DIROBJ)\enc\vp8l_enc.obj \
-    $(DIROBJ)\enc\webp_enc.obj \
-
-EXTRAS_OBJS = \
-    $(DIROBJ)\extras\extras.obj \
-    $(DIROBJ)\extras\quality_estimate.obj \
-
-IMAGEIO_UTIL_OBJS = \
-    $(DIROBJ)\imageio\imageio_util.obj \
-
-MUX_OBJS = \
-    $(DIROBJ)\mux\anim_encode.obj \
-    $(DIROBJ)\mux\muxedit.obj \
-    $(DIROBJ)\mux\muxinternal.obj \
-    $(DIROBJ)\mux\muxread.obj \
-
-UTILS_DEC_OBJS = \
-    $(DIROBJ)\utils\bit_reader_utils.obj \
-    $(DIROBJ)\utils\color_cache_utils.obj \
-    $(DIROBJ)\utils\filters_utils.obj \
-    $(DIROBJ)\utils\huffman_utils.obj \
-    $(DIROBJ)\utils\palette.obj \
-    $(DIROBJ)\utils\quant_levels_dec_utils.obj \
-    $(DIROBJ)\utils\rescaler_utils.obj \
-    $(DIROBJ)\utils\random_utils.obj \
-    $(DIROBJ)\utils\thread_utils.obj \
-    $(DIROBJ)\utils\utils.obj \
-
-UTILS_ENC_OBJS = \
-    $(DIROBJ)\utils\bit_writer_utils.obj \
-    $(DIROBJ)\utils\huffman_encode_utils.obj \
-    $(DIROBJ)\utils\quant_levels_utils.obj \
-
-LIBWEBPDECODER_OBJS = $(DEC_OBJS) $(DSP_DEC_OBJS) $(UTILS_DEC_OBJS)
-LIBWEBP_OBJS = $(LIBWEBPDECODER_OBJS) $(ENC_OBJS) \
-               $(DSP_ENC_OBJS) $(UTILS_ENC_OBJS) $(DLL_OBJS)
-LIBWEBPMUX_OBJS = $(MUX_OBJS) $(LIBWEBPMUX_OBJS)
-LIBWEBPDEMUX_OBJS = $(DEMUX_OBJS) $(LIBWEBPDEMUX_OBJS)
-LIBSHARPYUV_OBJS = $(SHARPYUV_OBJS)
-
-OUT_LIBS = $(LIBWEBPDECODER) $(LIBWEBP) $(LIBSHARPYUV)
-!IF "$(ARCH)" == "ARM"
-ex: $(OUT_LIBS)
-all: ex
-!ELSE
-OUT_EXAMPLES = $(DIRBIN)\cwebp.exe $(DIRBIN)\dwebp.exe
-EXTRA_EXAMPLES = $(DIRBIN)\vwebp.exe $(DIRBIN)\webpmux.exe \
-                 $(DIRBIN)\img2webp.exe $(DIRBIN)\get_disto.exe \
-                 $(DIRBIN)\webp_quality.exe $(DIRBIN)\vwebp_sdl.exe \
-                 $(DIRBIN)\webpinfo.exe
-
-ex: $(OUT_LIBS) $(OUT_EXAMPLES)
-all: ex $(EXTRA_EXAMPLES)
-# NB: gif2webp.exe and anim_diff.exe are excluded from 'all' as libgif requires
-# C99 support which is only available from VS2013 onward.
-gif2webp: $(DIRBIN)\gif2webp.exe
-anim_diff: $(DIRBIN)\anim_diff.exe
-anim_dump: $(DIRBIN)\anim_dump.exe
-
-$(DIRBIN)\anim_diff.exe: $(DIROBJ)\examples\anim_diff.obj $(EX_ANIM_UTIL_OBJS)
-$(DIRBIN)\anim_diff.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\anim_diff.exe: $(EX_GIF_DEC_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
-$(DIRBIN)\anim_dump.exe: $(DIROBJ)\examples\anim_dump.obj $(EX_ANIM_UTIL_OBJS)
-$(DIRBIN)\anim_dump.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\anim_dump.exe: $(EX_GIF_DEC_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
-$(DIRBIN)\anim_dump.exe: $(IMAGEIO_ENC_OBJS)
-$(DIRBIN)\cwebp.exe: $(DIROBJ)\examples\cwebp.obj $(IMAGEIO_DEC_OBJS)
-$(DIRBIN)\cwebp.exe: $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\cwebp.exe: $(LIBWEBPDEMUX) $(LIBSHARPYUV)
-$(DIRBIN)\dwebp.exe: $(DIROBJ)\examples\dwebp.obj $(IMAGEIO_DEC_OBJS)
-$(DIRBIN)\dwebp.exe: $(IMAGEIO_ENC_OBJS)
-$(DIRBIN)\dwebp.exe: $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\dwebp.exe: $(LIBWEBPDEMUX)
-$(DIRBIN)\gif2webp.exe: $(DIROBJ)\examples\gif2webp.obj $(EX_GIF_DEC_OBJS)
-$(DIRBIN)\gif2webp.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS) $(LIBWEBPMUX)
-$(DIRBIN)\gif2webp.exe: $(LIBWEBP)
-$(DIRBIN)\vwebp.exe: $(DIROBJ)\examples\vwebp.obj $(EX_UTIL_OBJS)
-$(DIRBIN)\vwebp.exe: $(IMAGEIO_UTIL_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
-$(DIRBIN)\vwebp_sdl.exe: $(DIROBJ)\extras\vwebp_sdl.obj
-$(DIRBIN)\vwebp_sdl.exe: $(DIROBJ)\extras\webp_to_sdl.obj
-$(DIRBIN)\vwebp_sdl.exe: $(IMAGEIO_UTIL_OBJS) $(LIBWEBP)
-$(DIRBIN)\webpmux.exe: $(DIROBJ)\examples\webpmux.obj $(LIBWEBPMUX)
-$(DIRBIN)\webpmux.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS) $(LIBWEBP)
-$(DIRBIN)\img2webp.exe: $(DIROBJ)\examples\img2webp.obj $(LIBWEBPMUX)
-$(DIRBIN)\img2webp.exe: $(IMAGEIO_DEC_OBJS)
-$(DIRBIN)\img2webp.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\img2webp.exe: $(LIBWEBPDEMUX) $(LIBWEBP) $(LIBSHARPYUV)
-$(DIRBIN)\get_disto.exe: $(DIROBJ)\extras\get_disto.obj
-$(DIRBIN)\get_disto.exe: $(IMAGEIO_DEC_OBJS) $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\get_disto.exe: $(LIBWEBPDEMUX) $(LIBWEBP)
-$(DIRBIN)\webp_quality.exe: $(DIROBJ)\extras\webp_quality.obj
-$(DIRBIN)\webp_quality.exe: $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\webp_quality.exe: $(EXTRAS_OBJS)
-# EXTRA_OBJS requires private symbols from dsp. Explicitly add those when
-# building libwebp as a dll.
-!IF "$(DLLBUILD)" == "TRUE"
-$(DIRBIN)\webp_quality.exe: $(DSP_DEC_OBJS)
-!ENDIF
-$(DIRBIN)\webp_quality.exe: $(LIBWEBP)
-$(DIRBIN)\webpinfo.exe: $(DIROBJ)\examples\webpinfo.obj
-$(DIRBIN)\webpinfo.exe: $(IMAGEIO_DEC_OBJS)
-$(DIRBIN)\webpinfo.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS)
-$(DIRBIN)\webpinfo.exe: $(LIBWEBPDEMUX) $(LIBWEBP)
-
-$(OUT_EXAMPLES): $(EX_UTIL_OBJS) $(LIBWEBP)
-$(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS): $(OUTPUT_DIRS)
-$(IMAGEIO_DEC_OBJS) $(IMAGEIO_ENC_OBJS) $(EXTRAS_OBJS): $(OUTPUT_DIRS)
-!ENDIF  # ARCH == ARM
-
-$(LIBSHARPYUV): $(LIBSHARPYUV_OBJS)
-$(LIBWEBPDECODER): $(LIBWEBPDECODER_OBJS)
-$(LIBWEBP): $(LIBWEBP_OBJS) $(LIBSHARPYUV)
-$(LIBWEBPMUX): $(LIBWEBPMUX_OBJS)
-$(LIBWEBPDEMUX): $(LIBWEBPDEMUX_OBJS)
-
-$(LIBWEBP_OBJS) $(LIBWEBPMUX_OBJS) $(LIBWEBPDEMUX_OBJS) $(LIBSHARPYUV_OBJS): \
-    $(OUTPUT_DIRS)
-
-!IF "$(DLLBUILD)" == "TRUE"
-{$(DIROBJ)}.c{$(DIROBJ)}.obj:
-	$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$@  $<
-
-{src}.rc{$(DIROBJ)}.res:
-	$(RC) /fo$@ $<
-{src\demux}.rc{$(DIROBJ)\demux}.res:
-	$(RC) /fo$@ $<
-{src\mux}.rc{$(DIROBJ)\mux}.res:
-	$(RC) /fo$@ $<
-{sharpyuv}.rc{$(DIROBJ)\sharpyuv}.res:
-	$(RC) /fo$@ $<
-
-$(LIBSHARPYUV): $(DIROBJ)\sharpyuv\$(LIBSHARPYUV_BASENAME:_debug=).res
-$(LIBWEBP): $(LIBSHARPYUV) $(DIROBJ)\$(LIBWEBP_BASENAME:_debug=).res
-$(LIBWEBPDECODER): $(DIROBJ)\$(LIBWEBPDECODER_BASENAME:_debug=).res
-$(LIBWEBPMUX): $(LIBWEBP) $(DIROBJ)\mux\$(LIBWEBPMUX_BASENAME:_debug=).res
-$(LIBWEBPDEMUX): $(LIBWEBP) $(DIROBJ)\demux\$(LIBWEBPDEMUX_BASENAME:_debug=).res
-
-$(LIBWEBPDECODER) $(LIBWEBP) $(LIBWEBPMUX) $(LIBWEBPDEMUX) $(LIBSHARPYUV):
-	$(LNKDLL) /out:$(DIRBIN)\$(@B:_dll=.dll) /implib:$@ $(LFLAGS) $**
-	-xcopy $(DIROBJ)\*.pdb $(DIRLIB) /y
-!ELSE
-$(LIBWEBPDECODER) $(LIBWEBP) $(LIBWEBPMUX) $(LIBWEBPDEMUX) $(LIBSHARPYUV):
-	$(LNKLIB) /out:$@ $**
-	-xcopy $(DIROBJ)\*.pdb $(DIRLIB) /y
-!ENDIF
-
-$(OUTPUT_DIRS):
-	@if not exist "$(@)" mkdir "$(@)"
-
-.SUFFIXES: .c .obj .res .exe
-# File-specific flag builds. Note batch rules take precedence over wildcards,
-# so for now name each file individually.
-$(DIROBJ)\examples\anim_diff.obj: examples\anim_diff.c
-	$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
-	  /Fo$(DIROBJ)\examples\ examples\$(@B).c
-$(DIROBJ)\examples\anim_dump.obj: examples\anim_dump.c
-	$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
-	  /Fo$(DIROBJ)\examples\ examples\$(@B).c
-$(DIROBJ)\examples\anim_util.obj: examples\anim_util.c
-	$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
-	  /Fo$(DIROBJ)\examples\ examples\$(@B).c
-$(DIROBJ)\examples\gif2webp.obj: examples\gif2webp.c
-	$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
-	  /Fo$(DIROBJ)\examples\ examples\$(@B).c
-$(DIROBJ)\examples\gifdec.obj: examples\gifdec.c
-	$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
-	  /Fo$(DIROBJ)\examples\ examples\$(@B).c
-# Batch rules
-{examples}.c{$(DIROBJ)\examples}.obj::
-	$(CC) $(CFLAGS) /Fd$(DIROBJ)\examples\ /Fo$(DIROBJ)\examples\ $<
-{extras}.c{$(DIROBJ)\extras}.obj::
-	$(CC) $(CFLAGS) /Fd$(DIROBJ)\extras\ /Fo$(DIROBJ)\extras\ $<
-{imageio}.c{$(DIROBJ)\imageio}.obj::
-	$(CC) $(CFLAGS) /Fd$(DIROBJ)\imageio\ /Fo$(DIROBJ)\imageio\ $<
-{sharpyuv}.c{$(DIROBJ)\sharpyuv}.obj::
-	$(CC) $(CFLAGS) /Fd$(DIROBJ)\sharpyuv\ /Fo$(DIROBJ)\sharpyuv\ $<
-{src\dec}.c{$(DIROBJ)\dec}.obj::
-	$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$(DIROBJ)\dec\ $<
-{src\demux}.c{$(DIROBJ)\demux}.obj::
-	$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$(DIROBJ)\demux\ $<
-{src\dsp}.c{$(DIROBJ)\dsp}.obj::
-	$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$(DIROBJ)\dsp\ $<
-{src\enc}.c{$(DIROBJ)\enc}.obj::
-	$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$(DIROBJ)\enc\ $<
-{src\mux}.c{$(DIROBJ)\mux}.obj::
-	$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$(DIROBJ)\mux\ $<
-{src\utils}.c{$(DIROBJ)\utils}.obj::
-	$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$(DIROBJ)\utils\ $<
-
-LNKLIBS     = ole32.lib windowscodecs.lib shlwapi.lib
-!IF "$(UNICODE)" == "1"
-LNKLIBS     = $(LNKLIBS) Shell32.lib
-!ENDIF
-
-{$(DIROBJ)\examples}.obj{$(DIRBIN)}.exe:
-	$(LNKEXE) $(LDFLAGS) /OUT:$@ $** $(LNKLIBS)
-
-{$(DIROBJ)\extras}.obj{$(DIRBIN)}.exe:
-	$(LNKEXE) $(LDFLAGS) /OUT:$@ $** $(LNKLIBS)
-
-clean::
-	@-erase /s $(DIROBJ)\*.dll 2> NUL
-	@-erase /s $(DIROBJ)\*.exp 2> NUL
-	@-erase /s $(DIROBJ)\*.idb 2> NUL
-	@-erase /s $(DIROBJ)\*.lib 2> NUL
-	@-erase /s $(DIROBJ)\*.obj 2> NUL
-	@-erase /s $(DIROBJ)\*.pch 2> NUL
-	@-erase /s $(DIROBJ)\*.pdb 2> NUL
-	@-erase /s $(DIROBJ)\*.res 2> NUL
-
-!ENDIF  # End of case where a config was provided.

external/libwebp/libwebp/NEWS

@@ -1,311 +0,0 @@
-- 6/23/2023: version 1.3.1
-  This is a binary compatible release.
-  * security fixes for lossless encoder (#603, chromium: #1420107, #1455619,
-    CVE-2023-1999)
-  * improve error reporting through WebPPicture error codes
-  * fix upsampling for RGB565 and RGBA4444 in NEON builds
-  * img2webp: add -sharp_yuv & -near_lossless
-  * Windows builds:
-    - fix compatibility with clang-cl (#607)
-    - improve Arm64 performance with cl.exe
-    - add Arm64EC support
-  * fix webp_js with emcc >= 3.1.27 (stack size change, #614)
-  * CMake fixes (#592, #610, #612)
-  * further updates to the container and lossless bitstream docs (#581, #611)
-
-- 12/16/2022: version 1.3.0
-  This is a binary compatible release.
-  * add libsharpyuv, which exposes -sharp_yuv/config.use_sharp_yuv
-    functionality to other libraries; libwebp now depends on this library
-  * major updates to the container and lossless bitstream docs (#448, #546,
-    #551)
-  * miscellaneous warning, bug & build fixes (#576, #583, #584)
-
-- 8/4/2022: version 1.2.4
-  This is a binary compatible release.
-  * restore CMake libwebpmux target name for compatibility with 1.2.2 (#575)
-  * fix lossless crunch mode encoding with WEBP_REDUCE_SIZE
-    (chromium: #1345547, #1345595, #1345772, #1345804)
-
-- 6/30/2022: version 1.2.3
-  This is a binary compatible release.
-  * security fix for lossless encoder (#565, chromium:1313709)
-  * improved progress granularity in WebPReportProgress() when using lossless
-  * improved precision in Sharp YUV (-sharp_yuv) conversion
-  * many corrections to webp-lossless-bitstream-spec.txt (#551)
-  * crash/leak fixes on error/OOM and other bug fixes (#558, #563, #569, #573)
-
-- 1/11/2022: version 1.2.2
-  This is a binary compatible release.
-  * webpmux: add "-set bgcolor A,R,G,B"
-  * add ARM64 NEON support for MSVC builds (#539)
-  * fix duplicate include error in Xcode when using multiple XCFrameworks in a
-    project (#542)
-  * doc updates and bug fixes (#538, #544, #548, #550)
-
-- 7/20/2021: version 1.2.1
-  This is a binary compatible release.
-  * minor lossless encoder improvements and x86 color conversion speed up
-  * add ARM64 simulator support to xcframeworkbuild.sh (#510)
-  * further security related hardening in libwebp & examples
-    (issues: #497, #508, #518)
-    (chromium: #1196480, #1196773, #1196775, #1196777, #1196778, #1196850)
-    (oss-fuzz: #28658, #28978)
-  * toolchain updates and bug fixes (#498, #501, #502, #504, #505, #506, #509,
-                                     #533)
-  * use more inclusive language within the source (#507)
-
-- 12/23/2020: version 1.2.0
-  * API changes:
-    - libwebp:
-      encode.h: add a qmin / qmax range for quality factor (cwebp adds -qrange)
-  * lossless encoder improvements
-  * SIMD support for Wasm builds
-  * add xcframeworkbuild.sh, supports Mac Catalyst builds
-  * import fuzzers from oss-fuzz & chromium (#409)
-  * webpmux: add an '-set loop <value>' option (#494)
-  * toolchain updates and bug fixes (#449, #463, #470, #475, #477, #478, #479,
-    #488, #491)
-
-- 12/18/2019: version 1.1.0
-  * API changes:
-    - libwebp:
-      WebPMalloc (issue #442)
-    - extras:
-      WebPUnmultiplyARGB
-  * alpha decode fix (issue #439)
-  * toolchain updates and bug fixes
-    (chromium: #1026858, #1027136, #1027409, #1028620, #1028716, #995200)
-    (oss-fuzz: #19430, #19447)
-
-- 7/4/2019: version 1.0.3
-  This is a binary compatible release.
-  * resize fixes for Nx1 sizes and the addition of non-opaque alpha values for
-    odd sizes (issues #418, #434)
-  * lossless encode/decode performance improvements
-  * lossy compression performance improvement at low quality levels with flat
-    content (issue #432)
-  * python swig files updated to support python 3
-  Tool updates:
-    vwebp will now preserve the aspect ratio of images that exceed monitor
-    resolution by scaling the image to fit (issue #433)
-
-- 1/14/2019: version 1.0.2
-  This is a binary compatible release.
-  * (Windows) unicode file support in the tools (linux and mac already had
-    support, issue #398)
-  * lossless encoder speedups
-  * lossy encoder speedup on ARM
-  * lossless multi-threaded security fix (chromium:917029)
-
-- 11/2/2018: version 1.0.1
-  This is a binary compatible release.
-  * lossless encoder speedups
-  * big-endian fix for alpha decoding (issue #393)
-  * gif2webp fix for loop count=65535 transcode (issue #382)
-  * further security related hardening in libwebp & libwebpmux
-    (issues #383, #385, #386, #387, #388, #391)
-    (oss-fuzz #9099, #9100, #9105, #9106, #9111, #9112, #9119, #9123, #9170,
-              #9178, #9179, #9183, #9186, #9191, #9364, #9417, #9496, #10349,
-              #10423, #10634, #10700, #10838, #10922, #11021, #11088, #11152)
-  * miscellaneous bug & build fixes (issues #381, #394, #396, #397, #400)
-
-- 4/2/2018: version 1.0.0
-  This is a binary compatible release.
-  * lossy encoder improvements to avoid chroma shifts in various circumstances
-    (issues #308, #340)
-  * big-endian fixes for decode, RGBA import and WebPPictureDistortion
-  Tool updates:
-    gifwebp, anim_diff - default duration behavior (<= 10ms) changed to match
-                         web browsers, transcoding tools (issue #379)
-    img2webp, webpmux - allow options to be passed in via a file (issue #355)
-
-- 11/24/2017: version 0.6.1
-  This is a binary compatible release.
-  * lossless performance and compression improvements + a new 'cruncher' mode
-    (-m 6 -q 100)
-  * ARM performance improvements with clang (15-20% w/ndk r15c, issue #339)
-  * webp-js: emscripten/webassembly based javascript decoder
-  * miscellaneous bug & build fixes (issue #329, #332, #343, #353, #360, #361,
-    #363)
-  Tool updates / additions:
-    added webpinfo - prints file format information (issue #330)
-    gif2webp - loop behavior modified to match Chrome M63+ (crbug.com/649264);
-               '-loop_compatibility' can be used for the old behavior
-
-- 1/26/2017: version 0.6.0
-  * lossless performance and compression improvements
-  * miscellaneous performance improvements (SSE2, NEON, MSA)
-  * webpmux gained a -duration option allowing for frame timing modification
-  * new img2webp utility allowing a sequence of images to be converted to
-    animated webp
-  * API changes:
-    - libwebp:
-      WebPPictureSharpARGBToYUVA
-      WebPPlaneDistortion
-    - libwebpmux / gif2webp:
-      WebPAnimEncoderOptions: kmax <= 0 now disables keyframes, kmax == 1
-                              forces all keyframes. See mux.h and the gif2webp
-                              manpage for details.
-
-- 12/13/2016: version 0.5.2
-  This is a binary compatible release.
-  This release covers CVE-2016-8888 and CVE-2016-9085.
-  * further security related hardening in the tools; fixes to
-    gif2webp/AnimEncoder (issues #310, #314, #316, #322), cwebp/libwebp (issue
-    #312)
-  * full libwebp (encoder & decoder) iOS framework; libwebpdecoder
-    WebP.framework renamed to WebPDecoder.framework (issue #307)
-  * CMake support for Android Studio (2.2)
-  * miscellaneous build related fixes (issue #306, #313)
-  * miscellaneous documentation improvements (issue #225)
-  * minor lossy encoder fixes and improvements
-
-- 6/14/2016: version 0.5.1
-  This is a binary compatible release.
-  * miscellaneous bug fixes (issues #280, #289)
-  * reverted alpha plane encoding with color cache for compatibility with
-    libwebp 0.4.0->0.4.3 (issues #291, #298)
-  * lossless encoding performance improvements
-  * memory reduction in both lossless encoding and decoding
-  * force mux output to be in the extended format (VP8X) when undefined chunks
-    are present (issue #294)
-  * gradle, cmake build support
-  * workaround for compiler bug causing 64-bit decode failures on android
-    devices using clang-3.8 in the r11c NDK
-  * various WebPAnimEncoder improvements
-
-- 12/17/2015: version 0.5.0
-  * miscellaneous bug & build fixes (issues #234, #258, #274, #275, #278)
-  * encoder & decoder speed-ups on x86/ARM/MIPS for lossy & lossless
-    - note! YUV->RGB conversion was sped-up, but the results will be slightly
-      different from previous releases
-  * various lossless encoder improvements
-  * gif2webp improvements, -min_size option added
-  * tools fully support input from stdin and output to stdout (issue #168)
-  * New WebPAnimEncoder API for creating animations
-  * New WebPAnimDecoder API for decoding animations
-  * other API changes:
-    - libwebp:
-      WebPPictureSmartARGBToYUVA() (-pre 4 in cwebp)
-      WebPConfig::exact (-exact in cwebp; -alpha_cleanup is now the default)
-      WebPConfig::near_lossless (-near_lossless in cwebp)
-      WebPFree() (free'ing webp allocated memory in other languages)
-      WebPConfigLosslessPreset()
-      WebPMemoryWriterClear()
-    - libwebpdemux: removed experimental fragment related fields and functions
-    - libwebpmux: WebPMuxSetCanvasSize()
-  * new libwebpextras library with some uncommon import functions:
-    WebPImportGray/WebPImportRGB565/WebPImportRGB4444
-
-- 10/15/15: version 0.4.4
-  This is a binary compatible release.
-  * rescaling out-of-bounds read fix (issue #254)
-  * various build fixes and improvements (issues #253, #259, #262, #267, #268)
-  * container documentation update
-  * gif2webp transparency fix (issue #245)
-
-- 3/3/15: version 0.4.3
-  This is a binary compatible release.
-  * Android / gcc / iOS / MSVS build fixes and improvements
-  * lossless decode fix (issue #239 -- since 0.4.0)
-  * documentation / vwebp updates for animation
-  * multi-threading fix (issue #234)
-
-- 10/13/14: version 0.4.2
-  This is a binary compatible release.
-  * Android / gcc build fixes
-  * (Windows) fix reading from stdin and writing to stdout
-  * gif2webp: miscellaneous fixes
-  * fix 'alpha-leak' with lossy compression (issue #220)
-  * the lossless bitstream spec has been amended to reflect the current code
-
-- 7/24/14: version 0.4.1
-  This is a binary compatible release.
-  * AArch64 (arm64) & MIPS support/optimizations
-  * NEON assembly additions:
-    - ~25% faster lossy decode / encode (-m 4)
-    - ~10% faster lossless decode
-    - ~5-10% faster lossless encode (-m 3/4)
-  * dwebp/vwebp can read from stdin
-  * cwebp/gif2webp can write to stdout
-  * cwebp can read webp files; useful if storing sources as webp lossless
-
-- 12/19/13: version 0.4.0
-  * improved gif2webp tool
-  * numerous fixes, compression improvement and speed-up
-  * dither option added to decoder (dwebp -dither 50 ...)
-  * improved multi-threaded modes (-mt option)
-  * improved filtering strength determination
-  * New function: WebPMuxGetCanvasSize
-  * BMP and TIFF format output added to 'dwebp'
-  * Significant memory reduction for decoding lossy images with alpha.
-  * Intertwined decoding of RGB and alpha for a shorter
-    time-to-first-decoded-pixel.
-  * WebPIterator has a new member 'has_alpha' denoting whether the frame
-    contains transparency.
-  * Container spec amended with new 'blending method' for animation.
-
-- 6/13/13: version 0.3.1
-  This is a binary compatible release.
-  * Add incremental decoding support for images containing ALPH and ICCP chunks.
-  * Python bindings via swig for the simple encode/decode interfaces similar to
-    Java.
-
-- 3/20/13: version 0.3.0
-  This is a binary compatible release.
-  * WebPINewRGB/WebPINewYUVA accept being passed a NULL output buffer
-    and will perform auto-allocation.
-  * default filter option is now '-strong -f 60'
-  * encoding speed-up for lossy methods 3 to 6
-  * alpha encoding can be done in parallel to lossy using 'cwebp -mt ...'
-  * color profile, metadata (XMP/EXIF) and animation support finalized in the
-    container.
-  * various NEON assembly additions
-  Tool updates / additions:
-    * gif2webp added
-    * vwebp given color profile & animation support
-    * cwebp can preserve color profile / metadata with '-metadata'
-
-- 10/30/12: version 0.2.1
-  * Various security related fixes
-  * cwebp.exe: fix import errors on Windows XP
-  * enable DLL builds for mingw targets
-
-- 8/3/12: version 0.2.0
-  * Add support for ARGB -> YUVA conversion for lossless decoder
-    New functions: WebPINewYUVA, WebPIDecGetYUVA
-  * Add stats for lossless and alpha encoding
-  * Security related hardening: allocation and size checks
-  * Add PAM output support to dwebp
-
-- 7/19/12: version 0.1.99
-  * This is a pre-release of 0.2.0, not an rc to allow for further
-    incompatible changes based on user feedback.
-  * Alpha channel encode/decode support.
-  * Lossless encoder/decoder.
-  * Add TIFF input support to cwebp.
-  Incompatible changes:
-    * The encode ABI has been modified to support alpha encoding.
-    * Deprecated function WebPINew() has been removed.
-    * Decode function signatures have changed to consistently use size_t over
-      int/uint32_t.
-    * decode_vp8.h is no longer installed system-wide.
-    * cwebp will encode the alpha channel if present.
-
-- 9/19/11: version 0.1.3
-  * Advanced decoding APIs.
-  * On-the-fly cropping and rescaling of images.
-  * SSE2 instructions for decoding performance optimizations on x86 based
-    platforms.
-  * Support Multi-threaded decoding.
-  * 40% improvement in Decoding performance.
-  * Add support for RGB565, RGBA4444 & ARGB image colorspace.
-  * Better handling of large picture encoding.
-
-- 3/25/11: version 0.1.2
-  * Incremental decoding: picture can be decoded byte-by-byte if needs be.
-  * lot of bug-fixes, consolidation and stabilization
-
-- 2/23/11: initial release of version 0.1, with the new encoder
-- 9/30/10: initial release version with only the lightweight decoder

external/libwebp/libwebp/PATENTS

@@ -1,23 +0,0 @@
-Additional IP Rights Grant (Patents)
-------------------------------------
-
-"These implementations" means the copyrightable works that implement the WebM
-codecs distributed by Google as part of the WebM Project.
-
-Google hereby grants to you a perpetual, worldwide, non-exclusive, no-charge,
-royalty-free, irrevocable (except as stated in this section) patent license to
-make, have made, use, offer to sell, sell, import, transfer, and otherwise
-run, modify and propagate the contents of these implementations of WebM, where
-such license applies only to those patent claims, both currently owned by
-Google and acquired in the future, licensable by Google that are necessarily
-infringed by these implementations of WebM. This grant does not include claims
-that would be infringed only as a consequence of further modification of these
-implementations. If you or your agent or exclusive licensee institute or order
-or agree to the institution of patent litigation or any other patent
-enforcement activity against any entity (including a cross-claim or
-counterclaim in a lawsuit) alleging that any of these implementations of WebM
-or any code incorporated within any of these implementations of WebM
-constitute direct or contributory patent infringement, or inducement of
-patent infringement, then any patent rights granted to you under this License
-for these implementations of WebM shall terminate as of the date such
-litigation is filed.

external/libwebp/libwebp/PRESUBMIT.py

@@ -1,245 +0,0 @@
-# Copyright (c) 2021, Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#   * Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#
-#   * Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.
-#
-#   * Neither the name of Google nor the names of its contributors may
-#     be used to endorse or promote products derived from this software
-#     without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Top-level presubmit script for libwebp.
-
-See https://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
-details on the presubmit API built into depot_tools.
-"""
-
-import re
-import subprocess2
-
-USE_PYTHON3 = True
-_BASH_INDENTATION = "2"
-_GIT_COMMIT_SUBJECT_LENGTH = 65
-_INCLUDE_BASH_FILES_ONLY = [r".*\.sh$"]
-_INCLUDE_MAN_FILES_ONLY = [r"man/.+\.1$"]
-_INCLUDE_SOURCE_FILES_ONLY = [r".*\.[ch]$"]
-_LIBWEBP_MAX_LINE_LENGTH = 80
-
-
-def _CheckCommitSubjectLength(input_api, output_api):
-  """Ensures commit's subject length is no longer than 65 chars."""
-  name = "git-commit subject"
-  cmd = ["git", "log", "-1", "--pretty=%s"]
-  start = input_api.time.time()
-  proc = subprocess2.Popen(
-      cmd,
-      stderr=subprocess2.PIPE,
-      stdout=subprocess2.PIPE,
-      universal_newlines=True)
-
-  stdout, _ = proc.communicate()
-  duration = input_api.time.time() - start
-
-  if not re.match(r"^Revert",
-                  stdout) and (len(stdout) - 1) > _GIT_COMMIT_SUBJECT_LENGTH:
-    failure_msg = (
-        "The commit subject: %s is too long (%d chars)\n"
-        "Try to keep this to 50 or less (up to 65 is permitted for "
-        "non-reverts).\n"
-        "https://www.git-scm.com/book/en/v2/Distributed-Git-Contributing-to-a-"
-        "Project#_commit_guidelines") % (stdout, len(stdout) - 1)
-    return output_api.PresubmitError("%s\n (%4.2fs) failed\n%s" %
-                                     (name, duration, failure_msg))
-
-  return output_api.PresubmitResult("%s\n (%4.2fs) success" % (name, duration))
-
-
-def _CheckDuplicateFiles(input_api, output_api):
-  """Ensures there are not repeated filenames."""
-  all_files = []
-  for f in input_api.change.AllFiles():
-    for include_file in _INCLUDE_SOURCE_FILES_ONLY:
-      if re.match(include_file, f):
-        all_files.append(f)
-        break
-
-  basename_to_path = {}
-  for f in all_files:
-    basename_file = input_api.basename(f)
-    if basename_file in basename_to_path:
-      basename_to_path[basename_file].append(f)
-    else:
-      basename_to_path[basename_file] = [f]
-
-  dupes = []
-  for files in basename_to_path.values():
-    if len(files) > 1:
-      dupes.extend(files)
-
-  if dupes:
-    return output_api.PresubmitError(
-        "Duplicate source files, rebase or rename some to make them unique:\n%s"
-        % dupes)
-  return output_api.PresubmitResult("No duplicates, success\n")
-
-
-def _GetFilesToSkip(input_api):
-  return list(input_api.DEFAULT_FILES_TO_SKIP) + [
-      r"swig/.*\.py$",
-      r"\.pylintrc$",
-  ]
-
-
-def _RunManCmd(input_api, output_api, man_file):
-  """man command wrapper."""
-  cmd = ["man", "--warnings", "-EUTF-8", "-l", "-Tutf8", "-Z", man_file]
-  name = "Check %s file." % man_file
-  start = input_api.time.time()
-  output, _ = subprocess2.communicate(
-      cmd, stdout=None, stderr=subprocess2.PIPE, universal_newlines=True)
-  duration = input_api.time.time() - start
-  if output[1]:
-    return output_api.PresubmitError("%s\n%s (%4.2fs) failed\n%s" %
-                                     (name, " ".join(cmd), duration, output[1]))
-  return output_api.PresubmitResult("%s\n%s (%4.2fs)\n" %
-                                    (name, " ".join(cmd), duration))
-
-
-def _RunShellCheckCmd(input_api, output_api, bash_file):
-  """shellcheck command wrapper."""
-  cmd = ["shellcheck", "-x", "-oall", "-sbash", bash_file]
-  name = "Check %s file." % bash_file
-  start = input_api.time.time()
-  output, rc = subprocess2.communicate(
-      cmd, stdout=None, stderr=subprocess2.PIPE, universal_newlines=True)
-  duration = input_api.time.time() - start
-  if rc == 0:
-    return output_api.PresubmitResult("%s\n%s (%4.2fs)\n" %
-                                      (name, " ".join(cmd), duration))
-  return output_api.PresubmitError("%s\n%s (%4.2fs) failed\n%s" %
-                                   (name, " ".join(cmd), duration, output[1]))
-
-
-def _RunShfmtCheckCmd(input_api, output_api, bash_file):
-  """shfmt command wrapper."""
-  cmd = [
-      "shfmt", "-i", _BASH_INDENTATION, "-bn", "-ci", "-sr", "-kp", "-d",
-      bash_file
-  ]
-  name = "Check %s file." % bash_file
-  start = input_api.time.time()
-  output, rc = subprocess2.communicate(
-      cmd, stdout=None, stderr=subprocess2.PIPE, universal_newlines=True)
-  duration = input_api.time.time() - start
-  if rc == 0:
-    return output_api.PresubmitResult("%s\n%s (%4.2fs)\n" %
-                                      (name, " ".join(cmd), duration))
-  return output_api.PresubmitError("%s\n%s (%4.2fs) failed\n%s" %
-                                   (name, " ".join(cmd), duration, output[1]))
-
-
-def _RunCmdOnCheckedFiles(input_api, output_api, run_cmd, files_to_check):
-  """Ensure that libwebp/ files are clean."""
-  file_filter = lambda x: input_api.FilterSourceFile(
-      x, files_to_check=files_to_check, files_to_skip=None)
-
-  affected_files = input_api.change.AffectedFiles(file_filter=file_filter)
-  results = [
-      run_cmd(input_api, output_api, f.AbsoluteLocalPath())
-      for f in affected_files
-  ]
-  return results
-
-
-def _CommonChecks(input_api, output_api):
-  """Ensures this patch does not have trailing spaces, extra EOLs,
-     or long lines.
-  """
-  results = []
-  results.extend(
-      input_api.canned_checks.CheckChangeHasNoCrAndHasOnlyOneEol(
-          input_api, output_api))
-  results.extend(
-      input_api.canned_checks.CheckChangeHasNoTabs(input_api, output_api))
-  results.extend(
-      input_api.canned_checks.CheckChangeHasNoStrayWhitespace(
-          input_api, output_api))
-  results.append(_CheckCommitSubjectLength(input_api, output_api))
-  results.append(_CheckDuplicateFiles(input_api, output_api))
-
-  source_file_filter = lambda x: input_api.FilterSourceFile(
-      x, files_to_skip=_GetFilesToSkip(input_api))
-  results.extend(
-      input_api.canned_checks.CheckLongLines(
-          input_api,
-          output_api,
-          maxlen=_LIBWEBP_MAX_LINE_LENGTH,
-          source_file_filter=source_file_filter))
-
-  results.extend(
-      input_api.canned_checks.CheckPatchFormatted(
-          input_api,
-          output_api,
-          check_clang_format=False,
-          check_python=True,
-          result_factory=output_api.PresubmitError))
-  results.extend(
-      _RunCmdOnCheckedFiles(input_api, output_api, _RunManCmd,
-                            _INCLUDE_MAN_FILES_ONLY))
-  # Run pylint.
-  results.extend(
-      input_api.canned_checks.RunPylint(
-          input_api,
-          output_api,
-          files_to_skip=_GetFilesToSkip(input_api),
-          pylintrc=".pylintrc",
-          version="2.7"))
-
-  # Binaries shellcheck and shfmt are not installed in depot_tools.
-  # Installation is needed
-  try:
-    subprocess2.communicate(["shellcheck", "--version"])
-    results.extend(
-        _RunCmdOnCheckedFiles(input_api, output_api, _RunShellCheckCmd,
-                              _INCLUDE_BASH_FILES_ONLY))
-    print("shfmt")
-    subprocess2.communicate(["shfmt", "-version"])
-    results.extend(
-        _RunCmdOnCheckedFiles(input_api, output_api, _RunShfmtCheckCmd,
-                              _INCLUDE_BASH_FILES_ONLY))
-  except OSError as os_error:
-    results.append(
-        output_api.PresubmitPromptWarning(
-            "%s\nPlease install missing binaries locally." % os_error.args[0]))
-  return results
-
-
-def CheckChangeOnUpload(input_api, output_api):
-  results = []
-  results.extend(_CommonChecks(input_api, output_api))
-  return results
-
-
-def CheckChangeOnCommit(input_api, output_api):
-  results = []
-  results.extend(_CommonChecks(input_api, output_api))
-  return results

external/libwebp/libwebp/README.md

@@ -1,53 +0,0 @@
-# WebP Codec
-
-```
-      __   __  ____  ____  ____
-     /  \\/  \/  _ \/  _ )/  _ \
-     \       /   __/  _  \   __/
-      \__\__/\____/\_____/__/ ____  ___
-            / _/ /    \    \ /  _ \/ _/
-           /  \_/   / /   \ \   __/  \__
-           \____/____/\_____/_____/____/v1.3.1
-```
-
-WebP codec is a library to encode and decode images in WebP format. This package
-contains the library that can be used in other programs to add WebP support, as
-well as the command line tools 'cwebp' and 'dwebp' to compress and decompress
-images respectively.
-
-See https://developers.google.com/speed/webp for details on the image format.
-
-The latest source tree is available at
-https://chromium.googlesource.com/webm/libwebp
-
-It is released under the same license as the WebM project. See
-https://www.webmproject.org/license/software/ or the "COPYING" file for details.
-An additional intellectual property rights grant can be found in the file
-PATENTS.
-
-## Building
-
-See the [building documentation](doc/building.md).
-
-## Encoding and Decoding Tools
-
-The examples/ directory contains tools to encode and decode images and
-animations, view information about WebP images, and more. See the
-[tools documentation](doc/tools.md).
-
-## APIs
-
-See the [APIs documentation](doc/api.md), and API usage examples in the
-`examples/` directory.
-
-## Bugs
-
-Please report all bugs to the issue tracker: https://bugs.chromium.org/p/webp
-
-Patches welcome! See [how to contribute](CONTRIBUTING.md).
-
-## Discuss
-
-Email: webp-discuss@webmproject.org
-
-Web: https://groups.google.com/a/webmproject.org/group/webp-discuss

external/libwebp/libwebp/autogen.sh

@@ -1,2 +0,0 @@
-#! /bin/sh -e
-exec autoreconf -fi

external/libwebp/libwebp/build.gradle

@@ -1,444 +0,0 @@
-// Define dependencies.
-buildscript {
-  repositories {
-    maven {
-      url "https://jcenter.bintray.com"
-    }
-  }
-  dependencies {
-    classpath "com.android.tools.build:gradle:${ANDROID_GRADLE_PLUGIN_VERSION}"
-  }
-}
-
-// Define versions in the project.
-project.ext {
-  buildToolsVersion = "${BUILD_TOOLS_VERSION}"
-  compileSdkVersion = COMPILE_SDK_VERSION.toInteger()
-}
-
-// Core libraries and executables.
-apply plugin: "c"
-def NEON
-model {
-  buildTypes {
-    debug
-    release
-  }
-  platforms {
-    arm {
-      architecture "arm"
-    }
-    arm64 {
-      architecture "arm64"
-    }
-    x86 {
-      architecture "x86"
-    }
-    x64 {
-      architecture "x86_64"
-    }
-    mips32r2
-    mips32r5
-    mips64r6
-  }
-  toolChains {
-    gcc(Gcc) {
-      target("mips32r2") {
-        cCompiler.args "-mips32r2"
-      }
-      target("mips32r5") {
-        cCompiler.args "-mips32r5"
-      }
-      target("mips64r6") {
-        cCompiler.args "-mips64r6"
-      }
-    }
-  }
-  binaries {
-    all {
-      if (toolChain in Gcc) {
-        cCompiler.args "-fPIC"
-        cCompiler.args "-Wall"
-        cCompiler.define "ANDROID"
-        cCompiler.define "HAVE_MALLOC_H"
-      }
-      // Optimizations.
-      if (buildType == buildTypes.release) {
-        if (toolChain in Gcc) {
-          cCompiler.args "-finline-functions"
-          cCompiler.args "-ffast-math"
-          cCompiler.args "-ffunction-sections"
-          cCompiler.args "-fdata-sections"
-        }
-        if (toolChain in Clang) {
-          cCompiler.args "-frename-registers -s"
-        }
-      }
-      // mips32 fails to build with clang from r14b
-      // https://bugs.chromium.org/p/webp/issues/detail?id=343
-      if (toolChain in Clang) {
-        if (getTargetPlatform() == "mips") {
-          cCompiler.args "-no-integrated-as"
-        }
-      }
-      // Check for NEON usage.
-      if (getTargetPlatform() == "arm") {
-        NEON = "c.neon"
-        cCompiler.define "HAVE_CPU_FEATURES_H"
-      } else {
-        NEON = "c"
-      }
-
-      cCompiler.args "-I" + file(".").absolutePath
-    }
-    // Link to pthread for shared libraries.
-    withType(SharedLibraryBinarySpec) {
-      if (toolChain in Gcc) {
-        cCompiler.define "HAVE_PTHREAD"
-        cCompiler.define "WEBP_USE_THREAD"
-        linker.args "-pthread"
-      }
-    }
-  }
-  components {
-    webp(NativeLibrarySpec) {
-      sources {
-        c {
-          source {
-            srcDir "sharpyuv"
-            include "sharpyuv.c"
-            include "sharpyuv_cpu.c"
-            include "sharpyuv_csp.c"
-            include "sharpyuv_dsp.c"
-            include "sharpyuv_gamma.c"
-            include "sharpyuv_neon.c"
-            include "sharpyuv_sse2.c"
-            srcDir "src/dec"
-            include "alpha_dec.c"
-            include "buffer_dec.c"
-            include "frame_dec.c"
-            include "idec_dec.c"
-            include "io_dec.c"
-            include "quant_dec.c"
-            include "tree_dec.c"
-            include "vp8_dec.c"
-            include "vp8l_dec.c"
-            include "webp_dec.c"
-            srcDir "src/dsp"
-            include "alpha_processing.c"
-            include "alpha_processing_mips_dsp_r2.c"
-            include "alpha_processing_neon.$NEON"
-            include "alpha_processing_sse2.c"
-            include "alpha_processing_sse41.c"
-            include "cpu.c"
-            include "dec.c"
-            include "dec_clip_tables.c"
-            include "dec_mips32.c"
-            include "dec_mips_dsp_r2.c"
-            include "dec_msa.c"
-            include "dec_neon.$NEON"
-            include "dec_sse2.c"
-            include "dec_sse41.c"
-            include "filters.c"
-            include "filters_mips_dsp_r2.c"
-            include "filters_msa.c"
-            include "filters_neon.$NEON"
-            include "filters_sse2.c"
-            include "lossless.c"
-            include "lossless_mips_dsp_r2.c"
-            include "lossless_msa.c"
-            include "lossless_neon.$NEON"
-            include "lossless_sse2.c"
-            include "lossless_sse41.c"
-            include "rescaler.c"
-            include "rescaler_mips32.c"
-            include "rescaler_mips_dsp_r2.c"
-            include "rescaler_msa.c"
-            include "rescaler_neon.$NEON"
-            include "rescaler_sse2.c"
-            include "upsampling.c"
-            include "upsampling_mips_dsp_r2.c"
-            include "upsampling_msa.c"
-            include "upsampling_neon.$NEON"
-            include "upsampling_sse2.c"
-            include "upsampling_sse41.c"
-            include "yuv.c"
-            include "yuv_mips32.c"
-            include "yuv_mips_dsp_r2.c"
-            include "yuv_neon.$NEON"
-            include "yuv_sse2.c"
-            include "yuv_sse41.c"
-            srcDir "src/utils"
-            include "bit_reader_utils.c"
-            include "color_cache_utils.c"
-            include "filters_utils.c"
-            include "huffman_utils.c"
-            include "palette.c"
-            include "quant_levels_dec_utils.c"
-            include "random_utils.c"
-            include "rescaler_utils.c"
-            include "thread_utils.c"
-            include "utils.c"
-            srcDir "src/dsp"
-            include "cost.c"
-            include "cost_mips32.c"
-            include "cost_mips_dsp_r2.c"
-            include "cost_neon.$NEON"
-            include "cost_sse2.c"
-            include "enc.c"
-            include "enc_mips32.c"
-            include "enc_mips_dsp_r2.c"
-            include "enc_msa.c"
-            include "enc_neon.$NEON"
-            include "enc_sse2.c"
-            include "enc_sse41.c"
-            include "lossless_enc.c"
-            include "lossless_enc_mips32.c"
-            include "lossless_enc_mips_dsp_r2.c"
-            include "lossless_enc_msa.c"
-            include "lossless_enc_neon.$NEON"
-            include "lossless_enc_sse2.c"
-            include "lossless_enc_sse41.c"
-            include "ssim.c"
-            include "ssim_sse2.c"
-            srcDir "src/enc"
-            include "alpha_enc.c"
-            include "analysis_enc.c"
-            include "backward_references_cost_enc.c"
-            include "backward_references_enc.c"
-            include "config_enc.c"
-            include "cost_enc.c"
-            include "filter_enc.c"
-            include "frame_enc.c"
-            include "histogram_enc.c"
-            include "iterator_enc.c"
-            include "near_lossless_enc.c"
-            include "picture_enc.c"
-            include "picture_csp_enc.c"
-            include "picture_psnr_enc.c"
-            include "picture_rescale_enc.c"
-            include "picture_tools_enc.c"
-            include "predictor_enc.c"
-            include "quant_enc.c"
-            include "syntax_enc.c"
-            include "token_enc.c"
-            include "tree_enc.c"
-            include "vp8l_enc.c"
-            include "webp_enc.c"
-            srcDir "src/utils"
-            include "bit_writer_utils.c"
-            include "huffman_encode_utils.c"
-            include "quant_levels_utils.c"
-          }
-          exportedHeaders {
-            srcDir "src"
-          }
-        }
-      }
-    }
-
-    webpdemux(NativeLibrarySpec) {
-      sources {
-        c {
-          source {
-            srcDir "src/demux"
-            include "anim_decode.c"
-            include "demux.c"
-          }
-        }
-      }
-    }
-
-    webpmux(NativeLibrarySpec) {
-      sources {
-        c {
-          source {
-            srcDir "src/mux/"
-            include "anim_encode.c"
-            include "muxedit.c"
-            include "muxinternal.c"
-            include "muxread.c"
-          }
-        }
-      }
-    }
-
-    // Executables from examples.
-    example_util(NativeLibrarySpec) {
-      binaries {
-        all {
-          lib library: "webp", linkage: "static"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./examples"
-            include "example_util.c"
-          }
-        }
-      }
-    }
-
-    imageio_util(NativeLibrarySpec) {
-      binaries {
-        all {
-          lib library: "webp", linkage: "static"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./imageio"
-            include "imageio_util.c"
-          }
-        }
-      }
-    }
-
-    imagedec(NativeLibrarySpec) {
-      binaries {
-        all {
-          lib library: "webpdemux", linkage: "static"
-          lib library: "webp", linkage: "static"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./imageio"
-            include "image_dec.c"
-            include "jpegdec.c"
-            include "metadata.c"
-            include "pngdec.c"
-            include "pnmdec.c"
-            include "tiffdec.c"
-            include "webpdec.c"
-          }
-        }
-      }
-    }
-
-    imageenc(NativeLibrarySpec) {
-      binaries {
-        all {
-          lib library: "webp", linkage: "static"
-          lib library: "imageio_util", linkage: "static"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./imageio"
-            include "image_enc.c"
-          }
-        }
-      }
-    }
-
-    cwebp(NativeExecutableSpec) {
-      binaries {
-        all {
-          lib library: "example_util", linkage: "static"
-          lib library: "imagedec", linkage: "static"
-          lib library: "imageio_util", linkage: "static"
-          lib library: "webpdemux", linkage: "static"
-          lib library: "webp", linkage: "static"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./examples"
-            include "cwebp.c"
-          }
-        }
-      }
-    }
-
-    dwebp(NativeExecutableSpec) {
-      binaries {
-        all {
-          lib library: "example_util", linkage: "static"
-          lib library: "imagedec", linkage: "static"
-          lib library: "imageenc", linkage: "static"
-          lib library: "imageio_util", linkage: "static"
-          lib library: "webpdemux", linkage: "static"
-          lib library: "webp"
-        }
-      }
-      sources {
-        c {
-          source {
-              srcDir "./examples"
-              include "dwebp.c"
-          }
-        }
-      }
-    }
-
-    webpmux_example(NativeExecutableSpec) {
-      binaries {
-        all {
-          lib library: "example_util", linkage: "static"
-          lib library: "imageio_util", linkage: "static"
-          lib library: "webpmux", linkage: "static"
-          lib library: "webp"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./examples"
-            include "webpmux.c"
-          }
-        }
-      }
-    }
-
-    img2webp_example(NativeExecutableSpec) {
-      binaries {
-        all {
-          lib library: "example_util", linkage: "static"
-          lib library: "imagedec", linkage: "static"
-          lib library: "imageio_util", linkage: "static"
-          lib library: "webpmux", linkage: "static"
-          lib library: "webpdemux", linkage: "static"
-          lib library: "webp"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./examples"
-            include "img2webp.c"
-          }
-        }
-      }
-    }
-
-    webpinfo_example(NativeExecutableSpec) {
-      binaries {
-        all {
-          lib library: "example_util", linkage: "static"
-          lib library: "imageio_util", linkage: "static"
-          lib library: "webp"
-        }
-      }
-      sources {
-        c {
-          source {
-            srcDir "./examples"
-            include "webpinfo.c"
-          }
-        }
-      }
-    }
-  }
-  tasks {
-    // Task to test all possible configurations.
-    buildAllExecutables(Task) {
-      dependsOn $.binaries.findAll { it.buildable }
-    }
-  }
-}

external/libwebp/libwebp/cmake/WebPConfig.cmake.in

@@ -1,18 +0,0 @@
-set(WebP_VERSION @PROJECT_VERSION@)
-set(WEBP_VERSION ${WebP_VERSION})
-
-@PACKAGE_INIT@
-
-if(@WEBP_USE_THREAD@)
-  include(CMakeFindDependencyMacro)
-  find_dependency(Threads REQUIRED)
-endif()
-
-include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
-
-set_and_check(WebP_INCLUDE_DIR "@PACKAGE_CMAKE_INSTALL_INCLUDEDIR@")
-set(WEBP_INCLUDE_DIRS ${WebP_INCLUDE_DIRS})
-set(WebP_LIBRARIES "@INSTALLED_LIBRARIES@")
-set(WEBP_LIBRARIES "${WebP_LIBRARIES}")
-
-check_required_components(WebP)

external/libwebp/libwebp/cmake/config.h.in

@@ -1,116 +0,0 @@
-/* Adapted from the autotools src/webp/config.h.in.  */
-
-/* Define if building universal (internal helper macro) */
-/* TODO: handle properly in CMake */
-#cmakedefine AC_APPLE_UNIVERSAL_BUILD 1
-
-/* Set to 1 if __builtin_bswap16 is available */
-#cmakedefine HAVE_BUILTIN_BSWAP16 1
-
-/* Set to 1 if __builtin_bswap32 is available */
-#cmakedefine HAVE_BUILTIN_BSWAP32 1
-
-/* Set to 1 if __builtin_bswap64 is available */
-#cmakedefine HAVE_BUILTIN_BSWAP64 1
-
-/* Define to 1 if you have the <cpu-features.h> header file. */
-#cmakedefine HAVE_CPU_FEATURES_H 1
-
-/* Define to 1 if you have the <GLUT/glut.h> header file. */
-#cmakedefine HAVE_GLUT_GLUT_H 1
-
-/* Define to 1 if you have the <GL/glut.h> header file. */
-#cmakedefine HAVE_GL_GLUT_H 1
-
-/* Define to 1 if you have the <OpenGL/glut.h> header file. */
-#cmakedefine HAVE_OPENGL_GLUT_H 1
-
-/* Define to 1 if you have the <shlwapi.h> header file. */
-#cmakedefine HAVE_SHLWAPI_H 1
-
-/* Define to 1 if you have the <unistd.h> header file. */
-#cmakedefine HAVE_UNISTD_H 1
-
-/* Define to 1 if you have the <wincodec.h> header file. */
-#cmakedefine HAVE_WINCODEC_H 1
-
-/* Define to 1 if you have the <windows.h> header file. */
-#cmakedefine HAVE_WINDOWS_H 1
-
-/* Define to the sub-directory in which libtool stores uninstalled libraries.
-   */
-/* TODO: handle properly in CMake */
-#cmakedefine LT_OBJDIR "@LT_OBJDIR@"
-
-/* Name of package */
-#cmakedefine PACKAGE "@PROJECT_NAME@"
-
-/* Define to the address where bug reports for this package should be sent. */
-#cmakedefine PACKAGE_BUGREPORT "@PACKAGE_BUGREPORT@"
-
-/* Define to the full name of this package. */
-#cmakedefine PACKAGE_NAME "@PACKAGE_NAME@"
-
-/* Define to the full name and version of this package. */
-#cmakedefine PACKAGE_STRING "@PACKAGE_STRING@"
-
-/* Define to the one symbol short name of this package. */
-#cmakedefine PACKAGE_TARNAME "@PACKAGE_TARNAME@"
-
-/* Define to the home page for this package. */
-#cmakedefine PACKAGE_URL "@PACKAGE_URL@"
-
-/* Define to the version of this package. */
-#cmakedefine PACKAGE_VERSION "@PACKAGE_VERSION@"
-
-/* Version number of package */
-#cmakedefine VERSION "@VERSION@"
-
-/* Set to 1 if GIF library is installed */
-#cmakedefine WEBP_HAVE_GIF 1
-
-/* Set to 1 if OpenGL is supported */
-#cmakedefine WEBP_HAVE_GL 1
-
-/* Set to 1 if JPEG library is installed */
-#cmakedefine WEBP_HAVE_JPEG 1
-
-/* Set to 1 if NEON is supported */
-#cmakedefine WEBP_HAVE_NEON
-
-/* Set to 1 if runtime detection of NEON is enabled */
-/* TODO: handle properly in CMake */
-#cmakedefine WEBP_HAVE_NEON_RTCD
-
-/* Set to 1 if PNG library is installed */
-#cmakedefine WEBP_HAVE_PNG 1
-
-/* Set to 1 if SDL library is installed */
-#cmakedefine WEBP_HAVE_SDL 1
-
-/* Set to 1 if SSE2 is supported */
-#cmakedefine WEBP_HAVE_SSE2 1
-
-/* Set to 1 if SSE4.1 is supported */
-#cmakedefine WEBP_HAVE_SSE41 1
-
-/* Set to 1 if TIFF library is installed */
-#cmakedefine WEBP_HAVE_TIFF 1
-
-/* Enable near lossless encoding */
-#cmakedefine WEBP_NEAR_LOSSLESS 1
-
-/* Undefine this to disable thread support. */
-#cmakedefine WEBP_USE_THREAD 1
-
-/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
-   significant byte first (like Motorola and SPARC, unlike Intel). */
-#if defined AC_APPLE_UNIVERSAL_BUILD
-# if defined __BIG_ENDIAN__
-#  define WORDS_BIGENDIAN 1
-# endif
-#else
-# ifndef WORDS_BIGENDIAN
-#  undef WORDS_BIGENDIAN
-# endif
-#endif

external/libwebp/libwebp/cmake/cpu.cmake

@@ -1,159 +0,0 @@
-#  Copyright (c) 2021 Google LLC.
-#
-#  Use of this source code is governed by a BSD-style license
-#  that can be found in the LICENSE file in the root of the source
-#  tree. An additional intellectual property rights grant can be found
-#  in the file PATENTS.  All contributing project authors may
-#  be found in the AUTHORS file in the root of the source tree.
-
-# Check for SIMD extensions.
-include(CMakePushCheckState)
-
-function(webp_check_compiler_flag WEBP_SIMD_FLAG ENABLE_SIMD)
-  if(NOT ENABLE_SIMD)
-    message(STATUS "Disabling ${WEBP_SIMD_FLAG} optimization.")
-    set(WEBP_HAVE_${WEBP_SIMD_FLAG} 0 PARENT_SCOPE)
-    return()
-  endif()
-  unset(WEBP_HAVE_FLAG_${WEBP_SIMD_FLAG} CACHE)
-  cmake_push_check_state()
-  set(CMAKE_REQUIRED_INCLUDES ${CMAKE_CURRENT_SOURCE_DIR})
-  check_c_source_compiles(
-    "
-      #include \"${CMAKE_CURRENT_LIST_DIR}/../src/dsp/dsp.h\"
-      int main(void) {
-        #if !defined(WEBP_USE_${WEBP_SIMD_FLAG})
-        this is not valid code
-        #endif
-        return 0;
-      }
-    "
-    WEBP_HAVE_FLAG_${WEBP_SIMD_FLAG})
-  cmake_pop_check_state()
-  if(WEBP_HAVE_FLAG_${WEBP_SIMD_FLAG})
-    set(WEBP_HAVE_${WEBP_SIMD_FLAG} 1 PARENT_SCOPE)
-  else()
-    set(WEBP_HAVE_${WEBP_SIMD_FLAG} 0 PARENT_SCOPE)
-  endif()
-endfunction()
-
-# those are included in the names of WEBP_USE_* in c++ code.
-set(WEBP_SIMD_FLAGS "SSE41;SSE2;MIPS32;MIPS_DSP_R2;NEON;MSA")
-set(WEBP_SIMD_FILE_EXTENSIONS
-    "_sse41.c;_sse2.c;_mips32.c;_mips_dsp_r2.c;_neon.c;_msa.c")
-if(MSVC AND CMAKE_C_COMPILER_ID STREQUAL "MSVC")
-  # With at least Visual Studio 12 (2013)+ /arch is not necessary to build SSE2
-  # or SSE4 code unless a lesser /arch is forced. MSVC does not have a SSE4
-  # flag, but an AVX one. Using that with SSE4 code risks generating illegal
-  # instructions when used on machines with SSE4 only. The flags are left for
-  # older (untested) versions to avoid any potential compatibility issues.
-  if(MSVC_VERSION GREATER_EQUAL 1800 AND NOT CMAKE_C_FLAGS MATCHES "/arch:")
-    set(SIMD_ENABLE_FLAGS)
-  else()
-    set(SIMD_ENABLE_FLAGS "/arch:AVX;/arch:SSE2;;;;")
-  endif()
-  set(SIMD_DISABLE_FLAGS)
-else()
-  set(SIMD_ENABLE_FLAGS "-msse4.1;-msse2;-mips32;-mdspr2;-mfpu=neon;-mmsa")
-  set(SIMD_DISABLE_FLAGS "-mno-sse4.1;-mno-sse2;;-mno-dspr2;;-mno-msa")
-endif()
-
-set(WEBP_SIMD_FILES_TO_INCLUDE)
-set(WEBP_SIMD_FLAGS_TO_INCLUDE)
-
-if(${ANDROID})
-  if(${ANDROID_ABI} STREQUAL "armeabi-v7a")
-    # This is because Android studio uses the configuration "-march=armv7-a
-    # -mfloat-abi=softfp -mfpu=vfpv3-d16" that does not trigger neon
-    # optimizations but should (as this configuration does not exist anymore).
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon ")
-  endif()
-endif()
-
-list(LENGTH WEBP_SIMD_FLAGS WEBP_SIMD_FLAGS_LENGTH)
-math(EXPR WEBP_SIMD_FLAGS_RANGE "${WEBP_SIMD_FLAGS_LENGTH} - 1")
-
-foreach(I_SIMD RANGE ${WEBP_SIMD_FLAGS_RANGE})
-  # With Emscripten 2.0.9 -msimd128 -mfpu=neon will enable NEON, but the source
-  # will fail to compile.
-  if(EMSCRIPTEN AND ${I_SIMD} GREATER_EQUAL 2)
-    break()
-  endif()
-
-  list(GET WEBP_SIMD_FLAGS ${I_SIMD} WEBP_SIMD_FLAG)
-
-  # First try with no extra flag added as the compiler might have default flags
-  # (especially on Android).
-  unset(WEBP_HAVE_${WEBP_SIMD_FLAG} CACHE)
-  cmake_push_check_state()
-  set(CMAKE_REQUIRED_FLAGS)
-  webp_check_compiler_flag(${WEBP_SIMD_FLAG} ${WEBP_ENABLE_SIMD})
-  if(NOT WEBP_HAVE_${WEBP_SIMD_FLAG})
-    list(GET SIMD_ENABLE_FLAGS ${I_SIMD} SIMD_COMPILE_FLAG)
-    if(EMSCRIPTEN)
-      set(SIMD_COMPILE_FLAG "-msimd128 ${SIMD_COMPILE_FLAG}")
-    endif()
-    set(CMAKE_REQUIRED_FLAGS ${SIMD_COMPILE_FLAG})
-    webp_check_compiler_flag(${WEBP_SIMD_FLAG} ${WEBP_ENABLE_SIMD})
-  else()
-    if(MSVC AND SIMD_ENABLE_FLAGS)
-      # The detection for SSE2/SSE4 support under MSVC is based on the compiler
-      # version so e.g., clang-cl will require flags to enable the assembly.
-      list(GET SIMD_ENABLE_FLAGS ${I_SIMD} SIMD_COMPILE_FLAG)
-    else()
-      set(SIMD_COMPILE_FLAG " ")
-    endif()
-  endif()
-  # Check which files we should include or not.
-  list(GET WEBP_SIMD_FILE_EXTENSIONS ${I_SIMD} WEBP_SIMD_FILE_EXTENSION)
-  file(GLOB SIMD_FILES "${CMAKE_CURRENT_LIST_DIR}/../"
-       "src/dsp/*${WEBP_SIMD_FILE_EXTENSION}")
-  if(WEBP_HAVE_${WEBP_SIMD_FLAG})
-    # Memorize the file and flags.
-    foreach(FILE ${SIMD_FILES})
-      list(APPEND WEBP_SIMD_FILES_TO_INCLUDE ${FILE})
-      list(APPEND WEBP_SIMD_FLAGS_TO_INCLUDE ${SIMD_COMPILE_FLAG})
-    endforeach()
-  else()
-    # Remove the file from the list.
-    foreach(FILE ${SIMD_FILES})
-      list(APPEND WEBP_SIMD_FILES_NOT_TO_INCLUDE ${FILE})
-    endforeach()
-    # Explicitly disable SIMD.
-    if(SIMD_DISABLE_FLAGS)
-      list(GET SIMD_DISABLE_FLAGS ${I_SIMD} SIMD_COMPILE_FLAG)
-      include(CheckCCompilerFlag)
-      if(SIMD_COMPILE_FLAG)
-        # Between 3.17.0 and 3.18.2 check_cxx_compiler_flag() sets a normal
-        # variable at parent scope while check_cxx_source_compiles() continues
-        # to set an internal cache variable, so we unset both to avoid the
-        # failure / success state persisting between checks. See
-        # https://gitlab.kitware.com/cmake/cmake/-/issues/21207.
-        unset(HAS_COMPILE_FLAG)
-        unset(HAS_COMPILE_FLAG CACHE)
-        check_c_compiler_flag(${SIMD_COMPILE_FLAG} HAS_COMPILE_FLAG)
-        if(HAS_COMPILE_FLAG)
-          # Do one more check for Clang to circumvent CMake issue 13194.
-          if(COMMAND check_compiler_flag_common_patterns)
-            # Only in CMake 3.0 and above.
-            check_compiler_flag_common_patterns(COMMON_PATTERNS)
-          else()
-            set(COMMON_PATTERNS)
-          endif()
-          set(CMAKE_REQUIRED_DEFINITIONS ${SIMD_COMPILE_FLAG})
-          check_c_source_compiles(
-            "int main(void) {return 0;}" FLAG_${SIMD_COMPILE_FLAG} FAIL_REGEX
-            "warning: argument unused during compilation:" ${COMMON_PATTERNS})
-          if(NOT FLAG_${SIMD_COMPILE_FLAG})
-            unset(HAS_COMPILE_FLAG)
-            unset(HAS_COMPILE_FLAG CACHE)
-          endif()
-        endif()
-        if(HAS_COMPILE_FLAG)
-          set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SIMD_COMPILE_FLAG}")
-        endif()
-      endif()
-    endif()
-  endif()
-  cmake_pop_check_state()
-endforeach()

external/libwebp/libwebp/cmake/deps.cmake

@@ -1,172 +0,0 @@
-#  Copyright (c) 2021 Google LLC.
-#
-#  Use of this source code is governed by a BSD-style license
-#  that can be found in the LICENSE file in the root of the source
-#  tree. An additional intellectual property rights grant can be found
-#  in the file PATENTS.  All contributing project authors may
-#  be found in the AUTHORS file in the root of the source tree.
-
-# Generate the config.h to compile with specific intrinsics / libs.
-
-# Check for compiler options.
-include(CheckCSourceCompiles)
-check_c_source_compiles(
-  "
-    int main(void) {
-      (void)__builtin_bswap16(0);
-      return 0;
-    }
-  "
-  HAVE_BUILTIN_BSWAP16)
-check_c_source_compiles(
-  "
-    int main(void) {
-      (void)__builtin_bswap32(0);
-      return 0;
-    }
-  "
-  HAVE_BUILTIN_BSWAP32)
-check_c_source_compiles(
-  "
-    int main(void) {
-      (void)__builtin_bswap64(0);
-      return 0;
-    }
-  "
-  HAVE_BUILTIN_BSWAP64)
-
-# Check for libraries.
-if(WEBP_USE_THREAD)
-  find_package(Threads)
-  if(Threads_FOUND)
-    # work around cmake bug on QNX (https://cmake.org/Bug/view.php?id=11333)
-    if(CMAKE_USE_PTHREADS_INIT AND NOT CMAKE_SYSTEM_NAME STREQUAL "QNX")
-      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pthread")
-    endif()
-    list(APPEND WEBP_DEP_LIBRARIES Threads::Threads)
-  endif()
-  set(WEBP_USE_THREAD ${Threads_FOUND})
-endif()
-
-# TODO: this seems unused, check with autotools.
-set(LT_OBJDIR ".libs/")
-
-# Only useful for vwebp, so useless for now.
-find_package(OpenGL)
-set(WEBP_HAVE_GL ${OPENGL_FOUND})
-
-# Check if we need to link to the C math library. We do not look for it as it is
-# not found when cross-compiling, while it is here.
-check_c_source_compiles(
-  "
-    #include <math.h>
-    int main(int argc, char** argv) {
-      return (int)pow(argc, 2.5);
-    }
-  "
-  HAVE_MATH_LIBRARY)
-if(NOT HAVE_MATH_LIBRARY)
-  message(STATUS "Adding -lm flag.")
-  list(APPEND SHARPYUV_DEP_LIBRARIES m)
-  list(APPEND WEBP_DEP_LIBRARIES m)
-endif()
-
-# Find the standard image libraries.
-set(WEBP_DEP_IMG_LIBRARIES)
-set(WEBP_DEP_IMG_INCLUDE_DIRS)
-if(WEBP_FIND_IMG_LIBS)
-  foreach(I_LIB PNG JPEG TIFF)
-    # Disable tiff when compiling in static mode as it is failing on Ubuntu.
-    if(WEBP_LINK_STATIC AND ${I_LIB} STREQUAL "TIFF")
-      message(STATUS "TIFF is disabled when statically linking.")
-      continue()
-    endif()
-    find_package(${I_LIB})
-    set(WEBP_HAVE_${I_LIB} ${${I_LIB}_FOUND})
-    if(${I_LIB}_FOUND)
-      list(APPEND WEBP_DEP_IMG_LIBRARIES ${${I_LIB}_LIBRARIES})
-      list(APPEND WEBP_DEP_IMG_INCLUDE_DIRS ${${I_LIB}_INCLUDE_DIR}
-           ${${I_LIB}_INCLUDE_DIRS})
-    endif()
-  endforeach()
-  if(WEBP_DEP_IMG_INCLUDE_DIRS)
-    list(REMOVE_DUPLICATES WEBP_DEP_IMG_INCLUDE_DIRS)
-  endif()
-
-  # GIF detection, gifdec isn't part of the imageio lib.
-  include(CMakePushCheckState)
-  set(WEBP_DEP_GIF_LIBRARIES)
-  set(WEBP_DEP_GIF_INCLUDE_DIRS)
-  find_package(GIF)
-  set(WEBP_HAVE_GIF ${GIF_FOUND})
-  if(GIF_FOUND)
-    # GIF find_package only locates the header and library, it doesn't fail
-    # compile tests when detecting the version, but falls back to 3 (as of at
-    # least cmake 3.7.2). Make sure the library links to avoid incorrect
-    # detection when cross compiling.
-    cmake_push_check_state()
-    set(CMAKE_REQUIRED_LIBRARIES ${GIF_LIBRARIES})
-    set(CMAKE_REQUIRED_INCLUDES ${GIF_INCLUDE_DIR})
-    check_c_source_compiles(
-      "
-      #include <gif_lib.h>
-      int main(void) {
-        (void)DGifOpenFileHandle;
-        return 0;
-      }
-      "
-      GIF_COMPILES)
-    cmake_pop_check_state()
-    if(GIF_COMPILES)
-      list(APPEND WEBP_DEP_GIF_LIBRARIES ${GIF_LIBRARIES})
-      list(APPEND WEBP_DEP_GIF_INCLUDE_DIRS ${GIF_INCLUDE_DIR})
-    else()
-      unset(GIF_FOUND)
-    endif()
-  endif()
-endif()
-
-# Check for specific headers.
-include(CheckIncludeFiles)
-check_include_files(GLUT/glut.h HAVE_GLUT_GLUT_H)
-check_include_files(GL/glut.h HAVE_GL_GLUT_H)
-check_include_files(OpenGL/glut.h HAVE_OPENGL_GLUT_H)
-check_include_files(shlwapi.h HAVE_SHLWAPI_H)
-check_include_files(unistd.h HAVE_UNISTD_H)
-check_include_files(wincodec.h HAVE_WINCODEC_H)
-check_include_files(windows.h HAVE_WINDOWS_H)
-
-# Windows specifics
-if(HAVE_WINCODEC_H)
-  list(APPEND WEBP_DEP_LIBRARIES shlwapi ole32 windowscodecs)
-endif()
-
-# Check for SIMD extensions.
-include(${CMAKE_CURRENT_LIST_DIR}/cpu.cmake)
-
-# Define extra info.
-set(PACKAGE ${PROJECT_NAME})
-set(PACKAGE_NAME ${PROJECT_NAME})
-
-# Read from configure.ac.
-file(READ ${CMAKE_CURRENT_SOURCE_DIR}/configure.ac CONFIGURE_AC)
-string(REGEX MATCHALL "\\[([0-9a-z\\.:/]*)\\]" CONFIGURE_AC_PACKAGE_INFO
-             ${CONFIGURE_AC})
-function(strip_bracket VAR)
-  string(LENGTH ${${VAR}} TMP_LEN)
-  math(EXPR TMP_LEN ${TMP_LEN}-2)
-  string(SUBSTRING ${${VAR}} 1 ${TMP_LEN} TMP_SUB)
-  set(${VAR} ${TMP_SUB} PARENT_SCOPE)
-endfunction()
-
-list(GET CONFIGURE_AC_PACKAGE_INFO 1 PACKAGE_VERSION)
-strip_bracket(PACKAGE_VERSION)
-list(GET CONFIGURE_AC_PACKAGE_INFO 2 PACKAGE_BUGREPORT)
-strip_bracket(PACKAGE_BUGREPORT)
-list(GET CONFIGURE_AC_PACKAGE_INFO 3 PACKAGE_URL)
-strip_bracket(PACKAGE_URL)
-
-# Build more info.
-set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
-set(PACKAGE_TARNAME ${PACKAGE_NAME})
-set(VERSION ${PACKAGE_VERSION})

external/libwebp/libwebp/codereview.settings

@@ -1,4 +0,0 @@
-# This file is used by git cl to get repository specific information.
-GERRIT_HOST: True
-CODE_REVIEW_SERVER: chromium-review.googlesource.com
-GERRIT_SQUASH_UPLOADS: False

external/libwebp/libwebp/configure.ac

@@ -1,803 +0,0 @@
-AC_INIT([libwebp], [1.3.1],
-        [https://bugs.chromium.org/p/webp],,
-        [https://developers.google.com/speed/webp])
-AC_CANONICAL_HOST
-AC_PREREQ([2.60])
-AM_INIT_AUTOMAKE([-Wall foreign subdir-objects])
-
-dnl === automake >= 1.12 requires this for 'unusual archivers' support.
-dnl === it must occur before LT_INIT (AC_PROG_LIBTOOL).
-m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
-
-dnl === AC_PROG_LIBTOOL is deprecated.
-m4_ifdef([LT_INIT], [LT_INIT], [AC_PROG_LIBTOOL])
-AC_PROG_SED
-AM_PROG_CC_C_O
-
-dnl === Enable less verbose output when building.
-m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
-
-dnl == test endianness
-AC_C_BIGENDIAN
-
-dnl === SET_IF_UNSET(shell_var, value)
-dnl ===   Set the shell variable 'shell_var' to 'value' if it is unset.
-AC_DEFUN([SET_IF_UNSET], [test "${$1+set}" = "set" || $1=$2])
-
-AC_ARG_ENABLE([everything],
-              AS_HELP_STRING([--enable-everything],
-                             [Enable all optional targets. These can still be
-                              disabled with --disable-target]),
-              [SET_IF_UNSET([enable_libsharpyuv], [$enableval])
-               SET_IF_UNSET([enable_libwebpdecoder], [$enableval])
-               SET_IF_UNSET([enable_libwebpdemux], [$enableval])
-               SET_IF_UNSET([enable_libwebpextras], [$enableval])
-               SET_IF_UNSET([enable_libwebpmux], [$enableval])])
-
-dnl === Check whether libwebpmux should be built
-AC_MSG_CHECKING(whether libwebpmux is to be built)
-AC_ARG_ENABLE([libwebpmux],
-              AS_HELP_STRING([--disable-libwebpmux],
-                             [Disable libwebpmux @<:@default=no@:>@]),
-              [], [enable_libwebpmux=yes])
-AC_MSG_RESULT(${enable_libwebpmux-no})
-AM_CONDITIONAL([BUILD_MUX], [test "$enable_libwebpmux" = "yes"])
-
-dnl === Check whether libwebpdemux should be built
-AC_MSG_CHECKING(whether libwebpdemux is to be built)
-AC_ARG_ENABLE([libwebpdemux],
-              AS_HELP_STRING([--disable-libwebpdemux],
-                             [Disable libwebpdemux @<:@default=no@:>@]),
-              [], [enable_libwebpdemux=yes])
-AC_MSG_RESULT(${enable_libwebpdemux-no})
-AM_CONDITIONAL([BUILD_DEMUX], [test "$enable_libwebpdemux" = "yes"])
-
-dnl === Check whether decoder library should be built.
-AC_MSG_CHECKING(whether decoder library is to be built)
-AC_ARG_ENABLE([libwebpdecoder],
-              AS_HELP_STRING([--enable-libwebpdecoder],
-                             [Build libwebpdecoder @<:@default=no@:>@]))
-AC_MSG_RESULT(${enable_libwebpdecoder-no})
-AM_CONDITIONAL([BUILD_LIBWEBPDECODER], [test "$enable_libwebpdecoder" = "yes"])
-
-dnl === Check whether libwebpextras should be built
-AC_MSG_CHECKING(whether libwebpextras is to be built)
-AC_ARG_ENABLE([libwebpextras],
-              AS_HELP_STRING([--enable-libwebpextras],
-                             [Build libwebpextras @<:@default=no@:>@]))
-AC_MSG_RESULT(${enable_libwebpextras-no})
-AM_CONDITIONAL([BUILD_EXTRAS], [test "$enable_libwebpextras" = "yes"])
-
-dnl === If --enable-asserts is not defined, define NDEBUG
-
-AC_MSG_CHECKING(whether asserts are enabled)
-AC_ARG_ENABLE([asserts],
-              AS_HELP_STRING([--enable-asserts],
-                             [Enable assert checks]))
-if test "x${enable_asserts-no}" = "xno"; then
-  AM_CPPFLAGS="${AM_CPPFLAGS} -DNDEBUG"
-fi
-AC_MSG_RESULT(${enable_asserts-no})
-AC_SUBST([AM_CPPFLAGS])
-
-AC_ARG_WITH([pkgconfigdir], AS_HELP_STRING([--with-pkgconfigdir=DIR],
-            [Path to the pkgconfig directory @<:@LIBDIR/pkgconfig@:>@]),
-            [pkgconfigdir="$withval"], [pkgconfigdir='${libdir}/pkgconfig'])
-AC_SUBST([pkgconfigdir])
-
-dnl === TEST_AND_ADD_CFLAGS(var, flag)
-dnl ===   Checks whether $CC supports 'flag' and adds it to 'var'
-dnl ===   on success.
-AC_DEFUN([TEST_AND_ADD_CFLAGS],
-         [SAVED_CFLAGS="$CFLAGS"
-          CFLAGS="-Werror $2"
-          AC_MSG_CHECKING([whether $CC supports $2])
-          dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition.
-          AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) { return 0; }])],
-                            [AC_MSG_RESULT([yes])]
-                            dnl Simply append the variable avoiding a
-                            dnl compatibility ifdef for AS_VAR_APPEND as this
-                            dnl variable shouldn't grow all that large.
-                            [$1="${$1} $2"],
-                            [AC_MSG_RESULT([no])])
-          CFLAGS="$SAVED_CFLAGS"])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-fvisibility=hidden])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wall])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wconstant-conversion])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wdeclaration-after-statement])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wextra])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wfloat-conversion])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat -Wformat-nonliteral])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat -Wformat-security])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-declarations])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-prototypes])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wold-style-definition])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wparentheses-equality])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshadow])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshorten-64-to-32])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wundef])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunreachable-code-aggressive])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunreachable-code])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused-but-set-variable])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused])
-TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wvla])
-# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62040
-# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61622
-AS_IF([test "$GCC" = "yes" ], [
-       gcc_version=`$CC -dumpversion`
-       gcc_wht_bug=""
-       case "$host_cpu" in
-         aarch64|arm64)
-          case "$gcc_version" in
-            4.9|4.9.0|4.9.1) gcc_wht_bug=yes ;;
-          esac
-       esac
-       AS_IF([test "$gcc_wht_bug" = "yes"], [
-              TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-frename-registers])])])
-# Use -flax-vector-conversions, if available, when building intrinsics with
-# older versions of gcc. The flag appeared in 4.3.x, but if backported, and
-# -fno-lax-vector-conversions is set, errors may occur with the intrinsics
-# files along with the older system includes, e.g., emmintrin.h.
-# Originally observed with cc (GCC) 4.2.1 20070831 patched [FreeBSD] (9.3).
-# https://bugs.chromium.org/p/webp/issues/detail?id=274
-AS_IF([test "$GCC" = "yes" ], [
-       case "$host_cpu" in
-         amd64|i?86|x86_64)
-           AC_COMPILE_IFELSE(
-             dnl only check for -flax-vector-conversions with older gcc, skip
-             dnl clang as it reports itself as 4.2.1, but the flag isn't needed.
-             [AC_LANG_SOURCE([#if !defined(__clang__) && defined(__GNUC__) && \
-                                  ((__GNUC__ << 8) | __GNUC_MINOR__) < 0x403
-                              #error old gcc
-                              #endif
-                              int main(void) { return 0; }
-                             ])],,
-              [TEST_AND_ADD_CFLAGS([INTRINSICS_CFLAGS],
-                                   [-flax-vector-conversions])])
-           ;;
-       esac])
-AC_SUBST([AM_CFLAGS])
-
-dnl === Check for machine specific flags
-AC_ARG_ENABLE([sse4.1],
-              AS_HELP_STRING([--disable-sse4.1],
-                             [Disable detection of SSE4.1 support
-                              @<:@default=auto@:>@]))
-
-AS_IF([test "x$enable_sse4_1" != "xno" -a "x$enable_sse2" != "xno"], [
-  SSE41_FLAGS="$INTRINSICS_CFLAGS $SSE41_FLAGS"
-  TEST_AND_ADD_CFLAGS([SSE41_FLAGS], [-msse4.1])
-  AS_IF([test -n "$SSE41_FLAGS"], [
-    SAVED_CFLAGS=$CFLAGS
-    CFLAGS="$CFLAGS $SSE41_FLAGS"
-    AC_CHECK_HEADER([smmintrin.h],
-                    [AC_DEFINE(WEBP_HAVE_SSE41, [1],
-                     [Set to 1 if SSE4.1 is supported])],
-                    [SSE41_FLAGS=""])
-    CFLAGS=$SAVED_CFLAGS])
-  AC_SUBST([SSE41_FLAGS])])
-
-AC_ARG_ENABLE([sse2],
-              AS_HELP_STRING([--disable-sse2],
-                             [Disable detection of SSE2 support
-                              @<:@default=auto@:>@]))
-
-AS_IF([test "x$enable_sse2" != "xno"], [
-  SSE2_FLAGS="$INTRINSICS_CFLAGS $SSE2_FLAGS"
-  TEST_AND_ADD_CFLAGS([SSE2_FLAGS], [-msse2])
-  AS_IF([test -n "$SSE2_FLAGS"], [
-    SAVED_CFLAGS=$CFLAGS
-    CFLAGS="$CFLAGS $SSE2_FLAGS"
-    AC_CHECK_HEADER([emmintrin.h],
-                    [AC_DEFINE(WEBP_HAVE_SSE2, [1],
-                     [Set to 1 if SSE2 is supported])],
-                    [SSE2_FLAGS=""])
-    CFLAGS=$SAVED_CFLAGS])
-  AC_SUBST([SSE2_FLAGS])])
-
-AC_ARG_ENABLE([neon],
-              AS_HELP_STRING([--disable-neon],
-                             [Disable detection of NEON support
-                              @<:@default=auto@:>@]))
-
-AC_ARG_ENABLE([neon_rtcd],
-              AS_HELP_STRING([--disable-neon-rtcd],
-                             [Disable runtime detection of NEON support via
-                              /proc/cpuinfo on Linux hosts
-                              @<:@default=auto@:>@]))
-# For ARM(7) hosts:
-# Both NEON flags unset and NEON support detected = build all modules with NEON
-# NEON detected with the use of -mfpu=neon = build only NEON modules with NEON
-AS_IF([test "x$enable_neon" != "xno"], [
-  case "$host_cpu" in
-    arm|armv7*)
-      # Test for NEON support without flags before falling back to -mfpu=neon
-      for flag in '' '-mfpu=neon'; do
-        LOCAL_NEON_FLAGS="$INTRINSICS_CFLAGS $NEON_FLAGS"
-        TEST_AND_ADD_CFLAGS([LOCAL_NEON_FLAGS], [$flag])
-        SAVED_CFLAGS=$CFLAGS
-        CFLAGS="$CFLAGS $LOCAL_NEON_FLAGS"
-
-        dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition.
-        AC_COMPILE_IFELSE([AC_LANG_SOURCE([
-          #include <arm_neon.h>
-          int main(void) {
-            int8x8_t v = vdup_n_s8(0);
-            (void)v;
-            return 0;
-          }])],
-          [NEON_FLAGS="$(echo $LOCAL_NEON_FLAGS | $SED 's/^ *//')"
-           AS_IF([test -n "$NEON_FLAGS"], [
-             AS_IF([test "${host_os%%-*}" = "linux" -o \
-                         "x$enable_neon_rtcd" = "xno"], [
-               CFLAGS=$SAVED_CFLAGS
-               AC_DEFINE(WEBP_HAVE_NEON, [1], [Set to 1 if NEON is supported])
-               break
-             ],[
-               AC_MSG_WARN(m4_normalize([NEON runtime cpu-detection is
-                                         unavailable for ${host_os%%-*}. Force
-                                         with CFLAGS=-mfpu=neon or
-                                         --disable-neon-rtcd.]))
-               enable_neon_rtcd=no
-               NEON_FLAGS=""
-             ])
-           ],[
-             CFLAGS=$SAVED_CFLAGS
-             AC_DEFINE(WEBP_HAVE_NEON, [1], [Set to 1 if NEON is supported])
-             break
-           ])])
-        CFLAGS=$SAVED_CFLAGS
-      done
-
-      AS_IF([test -n "$NEON_FLAGS"], [
-        # If NEON is available and rtcd is disabled apply NEON_FLAGS globally.
-        AS_IF([test "x$enable_neon_rtcd" = "xno"], [
-          AM_CFLAGS="$AM_CFLAGS $NEON_FLAGS"
-          NEON_FLAGS=""],
-          [AC_DEFINE(WEBP_HAVE_NEON_RTCD, [1],
-                     [Set to 1 if runtime detection of NEON is enabled])])])
-
-      case "$host_os" in
-        *android*) AC_CHECK_HEADERS([cpu-features.h]) ;;
-      esac
-      ;;
-    aarch64*|arm64*)
-      AC_DEFINE(WEBP_HAVE_NEON, [1], [Set to 1 if NEON is supported])
-      ;;
-  esac
-  AC_SUBST([NEON_FLAGS])])
-
-dnl === CLEAR_LIBVARS([var_pfx])
-dnl ===   Clears <var_pfx>_{INCLUDES,LIBS}.
-AC_DEFUN([CLEAR_LIBVARS], [$1_INCLUDES=""; $1_LIBS=""])
-
-dnl === WITHLIB_OPTION([opt_pfx], [outvar_pfx])
-dnl ===   Defines --with-<opt_pfx>{include,lib}dir options which set
-dnl ===   the variables <outvar_pfx>_{INCLUDES,LIBS}.
-AC_DEFUN([WITHLIB_OPTION],
-  [AC_ARG_WITH([$1includedir],
-               AS_HELP_STRING([--with-$1includedir=DIR],
-                              [use $2 includes from DIR]),
-               $2_INCLUDES="-I$withval")
-   AC_ARG_WITH([$1libdir],
-               AS_HELP_STRING([--with-$1libdir=DIR],
-                              [use $2 libraries from DIR]),
-               [$2_LIBS="-L$withval"])])
-
-dnl === LIBCHECK_PROLOGUE([var_pfx])
-dnl ===   Caches the current values of CPPFLAGS/LIBS in SAVED_* then
-dnl ===   prepends the current values with <var_pfx>_{INCLUDES,LIBS}.
-AC_DEFUN([LIBCHECK_PROLOGUE],
-         [SAVED_CPPFLAGS=$CPPFLAGS
-          SAVED_LIBS=$LIBS
-          CPPFLAGS="$$1_INCLUDES $CPPFLAGS"
-          LIBS="$$1_LIBS $LIBS"])
-
-dnl === LIBCHECK_EPILOGUE([var_pfx])
-dnl ===   Restores the values of CPPFLAGS/LIBS from SAVED_* and exports
-dnl ===   <var_pfx>_{INCLUDES,LIBS} with AC_SUBST.
-AC_DEFUN([LIBCHECK_EPILOGUE],
-         [AC_SUBST($1_LIBS)
-          AC_SUBST($1_INCLUDES)
-          CPPFLAGS=$SAVED_CPPFLAGS
-          LIBS=$SAVED_LIBS])
-
-dnl === Check for gcc builtins
-
-dnl === CHECK_FOR_BUILTIN([builtin], [param], [define])
-dnl ===   links a C AC_LANG_PROGRAM, with <builtin>(<param>)
-dnl ===   AC_DEFINE'ing <define> if successful.
-AC_DEFUN([CHECK_FOR_BUILTIN],
-         [AC_LANG_PUSH([C])
-          AC_MSG_CHECKING([for $1])
-          AC_LINK_IFELSE([AC_LANG_PROGRAM([], [(void)$1($2)])],
-                         [AC_MSG_RESULT([yes])
-                          AC_DEFINE([$3], [1],
-                                    [Set to 1 if $1 is available])],
-                         [AC_MSG_RESULT([no])]),
-          AC_LANG_POP])
-
-dnl AC_CHECK_FUNC doesn't work with builtin's.
-CHECK_FOR_BUILTIN([__builtin_bswap16], [1u << 15], [HAVE_BUILTIN_BSWAP16])
-CHECK_FOR_BUILTIN([__builtin_bswap32], [1u << 31], [HAVE_BUILTIN_BSWAP32])
-CHECK_FOR_BUILTIN([__builtin_bswap64], [1ull << 63], [HAVE_BUILTIN_BSWAP64])
-
-dnl === Check for pthread support
-AC_ARG_ENABLE([threading],
-              AS_HELP_STRING([--disable-threading],
-                             [Disable detection of thread support]),,
-              [enable_threading=yes])
-if test "$enable_threading" = "yes"; then
-  AC_MSG_NOTICE([checking for threading support...])
-  AX_PTHREAD([AC_DEFINE([WEBP_USE_THREAD], [1],
-                        [Undefine this to disable thread support.])
-              LIBS="$PTHREAD_LIBS $LIBS"
-              CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-              CC="$PTHREAD_CC"
-             ],
-             [AC_CHECK_FUNC([_beginthreadex],
-                            [AC_DEFINE([WEBP_USE_THREAD], [1],
-                                       [Undefine this to disable thread
-                                        support.])],
-                            [enable_threading=no])])
-fi
-AC_MSG_NOTICE([checking if threading is enabled... ${enable_threading-no}])
-
-dnl === check for OpenGL/GLUT support ===
-
-AC_ARG_ENABLE([gl], AS_HELP_STRING([--disable-gl],
-                                   [Disable detection of OpenGL support
-                                    @<:@default=auto@:>@]))
-AS_IF([test "x$enable_gl" != "xno"], [
-  CLEAR_LIBVARS([GL])
-  WITHLIB_OPTION([gl], [GL])
-
-  LIBCHECK_PROLOGUE([GL])
-
-  glut_cflags="none"
-  glut_ldflags="none"
-  case $host_os in
-    darwin*)
-      # Special case for OSX builds. Append these to give the user a chance to
-      # override with --with-gl*
-      glut_cflags="$glut_cflags|-framework GLUT -framework OpenGL"
-      glut_ldflags="$glut_ldflags|-framework GLUT -framework OpenGL"
-      # quiet deprecation warnings for glut
-      TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wno-deprecated-declarations])
-      ;;
-  esac
-
-  GLUT_SAVED_CPPFLAGS="$CPPFLAGS"
-  SAVED_IFS="$IFS"
-  IFS="|"
-  for flag in $glut_cflags; do
-    # restore IFS immediately as the autoconf macros may need the default.
-    IFS="$SAVED_IFS"
-    unset ac_cv_header_GL_glut_h
-    unset ac_cv_header_OpenGL_glut_h
-
-    case $flag in
-      none) ;;
-      *) CPPFLAGS="$flag $CPPFLAGS";;
-    esac
-    AC_CHECK_HEADERS([GL/glut.h GLUT/glut.h OpenGL/glut.h],
-                     [glut_headers=yes;
-                      test "$flag" = "none" || GL_INCLUDES="$CPPFLAGS";
-                      break])
-    CPPFLAGS="$GLUT_SAVED_CPPFLAGS"
-    test "$glut_headers" = "yes" && break
-  done
-  IFS="$SAVED_IFS"
-
-  if test "$glut_headers" = "yes"; then
-    AC_LANG_PUSH([C])
-    GLUT_SAVED_LDFLAGS="$LDFLAGS"
-    SAVED_IFS="$IFS"
-    IFS="|"
-    for flag in $glut_ldflags; do
-      # restore IFS immediately as the autoconf macros may need the default.
-      IFS="$SAVED_IFS"
-      unset ac_cv_search_glBegin
-
-      case $flag in
-        none) ;;
-        *) LDFLAGS="$flag $LDFLAGS";;
-      esac
-
-      # find libGL
-      GL_SAVED_LIBS="$LIBS"
-      AC_SEARCH_LIBS([glBegin], [GL OpenGL opengl32])
-      LIBS="$GL_SAVED_LIBS"
-
-      # A direct link to libGL may not be necessary on e.g., linux.
-      GLUT_SAVED_LIBS="$LIBS"
-      for lib in "" "-lglut" "-lglut $ac_cv_search_glBegin"; do
-        LIBS="$lib"
-        AC_LINK_IFELSE(
-          [AC_LANG_PROGRAM([
-             #ifdef __cplusplus
-             # define EXTERN_C extern "C"
-             #else
-             # define EXTERN_C
-             #endif
-             EXTERN_C char glOrtho();
-             EXTERN_C char glutMainLoop();
-            ],[
-             glOrtho();
-             glutMainLoop();
-            ])
-          ],
-          AC_DEFINE(WEBP_HAVE_GL, [1],
-                    [Set to 1 if OpenGL is supported])
-          [glut_support=yes], []
-        )
-        if test "$glut_support" = "yes"; then
-          GL_LIBS="$LDFLAGS $lib"
-          break
-        fi
-      done
-      LIBS="$GLUT_SAVED_LIBS"
-      LDFLAGS="$GLUT_SAVED_LDFLAGS"
-      test "$glut_support" = "yes" && break
-    done
-    IFS="$SAVED_IFS"
-    AC_LANG_POP
-  fi
-
-  LIBCHECK_EPILOGUE([GL])
-
-  if test "$glut_support" = "yes" -a "$enable_libwebpdemux" = "yes"; then
-    build_vwebp=yes
-  else
-    AC_MSG_NOTICE(
-      m4_normalize([Not building vwebp.
-                    OpenGL libraries and --enable-libwebpdemux are required.]))
-  fi
-])
-AM_CONDITIONAL([BUILD_VWEBP], [test "$build_vwebp" = "yes"])
-
-dnl === check for SDL support ===
-
-AC_ARG_ENABLE([sdl],
-              AS_HELP_STRING([--disable-sdl],
-                             [Disable detection of SDL support
-                              @<:@default=auto@:>@]))
-AS_IF([test "x$enable_sdl" != "xno"], [
-  CLEAR_LIBVARS([SDL])
-  AC_PATH_PROGS([LIBSDL_CONFIG], [sdl-config])
-  if test -n "$LIBSDL_CONFIG"; then
-    SDL_INCLUDES=`$LIBSDL_CONFIG --cflags`
-    SDL_LIBS="`$LIBSDL_CONFIG --libs`"
-  fi
-
-  WITHLIB_OPTION([sdl], [SDL])
-
-  sdl_header="no"
-  LIBCHECK_PROLOGUE([SDL])
-  AC_CHECK_HEADER([SDL/SDL.h], [sdl_header="SDL/SDL.h"],
-                  [AC_CHECK_HEADER([SDL.h], [sdl_header="SDL.h"],
-                  [AC_MSG_WARN(SDL library not available - no sdl.h)])])
-  if test x"$sdl_header" != "xno"; then
-    AC_LANG_PUSH(C)
-    SDL_SAVED_LIBS="$LIBS"
-    for lib in "" "-lSDL" "-lSDLmain -lSDL"; do
-      LIBS="$SDL_SAVED_LIBS $lib"
-      # Perform a full link to ensure SDL_main is resolved if needed.
-      AC_LINK_IFELSE(
-        [AC_LANG_SOURCE([
-           #include <$sdl_header>
-           int main(int argc, char** argv) {
-             SDL_Init(0);
-             return 0;
-           }])],
-        [SDL_LIBS="$LDFLAGS $LIBS"
-         SDL_INCLUDES="$SDL_INCLUDES -DWEBP_HAVE_SDL"
-         AC_DEFINE(WEBP_HAVE_SDL, [1],
-                   [Set to 1 if SDL library is installed])
-         sdl_support=yes]
-      )
-      if test x"$sdl_support" = "xyes"; then
-        break
-      fi
-    done
-    # LIBS is restored by LIBCHECK_EPILOGUE
-    AC_LANG_POP
-    if test x"$sdl_header" = "xSDL.h"; then
-      SDL_INCLUDES="$SDL_INCLUDES -DWEBP_HAVE_JUST_SDL_H"
-    fi
-  fi
-  LIBCHECK_EPILOGUE([SDL])
-
-  if test x"$sdl_support" = "xyes"; then
-    build_vwebp_sdl=yes
-  else
-    AC_MSG_NOTICE([Not building vwebp-sdl. SDL library is required.])
-  fi
-])
-
-AM_CONDITIONAL([BUILD_VWEBP_SDL], [test "$build_vwebp_sdl" = "yes"])
-
-dnl === check for PNG support ===
-
-AC_ARG_ENABLE([png], AS_HELP_STRING([--disable-png],
-                                    [Disable detection of PNG format support
-                                     @<:@default=auto@:>@]))
-AS_IF([test "x$enable_png" != "xno"], [
-  CLEAR_LIBVARS([PNG])
-  AC_PATH_PROGS([LIBPNG_CONFIG],
-                [libpng-config libpng16-config libpng15-config libpng14-config \
-                 libpng12-config])
-  if test -n "$LIBPNG_CONFIG"; then
-    PNG_INCLUDES=`$LIBPNG_CONFIG --cflags`
-    PNG_LIBS="`$LIBPNG_CONFIG --ldflags`"
-  fi
-
-  WITHLIB_OPTION([png], [PNG])
-
-  LIBCHECK_PROLOGUE([PNG])
-  AC_CHECK_HEADER(png.h,
-    AC_SEARCH_LIBS(png_get_libpng_ver, [png],
-                   [test "$ac_cv_search_png_get_libpng_ver" = "none required" \
-                      || PNG_LIBS="$PNG_LIBS $ac_cv_search_png_get_libpng_ver"
-                    PNG_INCLUDES="$PNG_INCLUDES -DWEBP_HAVE_PNG"
-                    AC_DEFINE(WEBP_HAVE_PNG, [1],
-                              [Set to 1 if PNG library is installed])
-                    png_support=yes
-                   ],
-                   [AC_MSG_WARN(Optional png library not found)
-                    PNG_LIBS=""
-                    PNG_INCLUDES=""
-                   ],
-                   [$MATH_LIBS]),
-    [AC_MSG_WARN(png library not available - no png.h)
-     PNG_LIBS=""
-     PNG_INCLUDES=""
-    ],
-  )
-  LIBCHECK_EPILOGUE([PNG])
-])
-
-dnl === check for JPEG support ===
-
-AC_ARG_ENABLE([jpeg],
-              AS_HELP_STRING([--disable-jpeg],
-                             [Disable detection of JPEG format support
-                              @<:@default=auto@:>@]))
-AS_IF([test "x$enable_jpeg" != "xno"], [
-  CLEAR_LIBVARS([JPEG])
-  WITHLIB_OPTION([jpeg], [JPEG])
-
-  LIBCHECK_PROLOGUE([JPEG])
-  AC_CHECK_HEADER(jpeglib.h,
-    AC_CHECK_LIB(jpeg, jpeg_set_defaults,
-                 [JPEG_LIBS="$JPEG_LIBS -ljpeg"
-                  JPEG_INCLUDES="$JPEG_INCLUDES -DWEBP_HAVE_JPEG"
-                  AC_DEFINE(WEBP_HAVE_JPEG, [1],
-                            [Set to 1 if JPEG library is installed])
-                  jpeg_support=yes
-                 ],
-                 AC_MSG_WARN(Optional jpeg library not found),
-                 [$MATH_LIBS]),
-    AC_MSG_WARN(jpeg library not available - no jpeglib.h)
-  )
-  LIBCHECK_EPILOGUE([JPEG])
-])
-
-dnl === check for TIFF support ===
-
-AC_ARG_ENABLE([tiff],
-              AS_HELP_STRING([--disable-tiff],
-                             [Disable detection of TIFF format support
-                              @<:@default=auto@:>@]))
-AS_IF([test "x$enable_tiff" != "xno"], [
-  CLEAR_LIBVARS([TIFF])
-  WITHLIB_OPTION([tiff], [TIFF])
-
-  LIBCHECK_PROLOGUE([TIFF])
-  AC_CHECK_HEADER(tiffio.h,
-    AC_CHECK_LIB(tiff, TIFFGetVersion,
-                 [TIFF_LIBS="$TIFF_LIBS -ltiff"
-                  TIFF_INCLUDES="$TIFF_INCLUDES -DWEBP_HAVE_TIFF"
-                  AC_DEFINE(WEBP_HAVE_TIFF, [1],
-                            [Set to 1 if TIFF library is installed])
-                  tiff_support=yes
-                 ],
-                 AC_MSG_WARN(Optional tiff library not found),
-                 [$MATH_LIBS]),
-    AC_MSG_WARN(tiff library not available - no tiffio.h)
-  )
-  LIBCHECK_EPILOGUE([TIFF])
-])
-
-dnl === check for GIF support ===
-
-AC_ARG_ENABLE([gif], AS_HELP_STRING([--disable-gif],
-                                    [Disable detection of GIF format support
-                                     @<:@default=auto@:>@]))
-AS_IF([test "x$enable_gif" != "xno"], [
-  CLEAR_LIBVARS([GIF])
-  WITHLIB_OPTION([gif], [GIF])
-
-  LIBCHECK_PROLOGUE([GIF])
-  AC_CHECK_HEADER(gif_lib.h,
-    AC_CHECK_LIB([gif], [DGifOpenFileHandle],
-                 [GIF_LIBS="$GIF_LIBS -lgif"
-                  AC_DEFINE(WEBP_HAVE_GIF, [1],
-                            [Set to 1 if GIF library is installed])
-                  gif_support=yes
-                 ],
-                 AC_MSG_WARN(Optional gif library not found),
-                 [$MATH_LIBS]),
-    AC_MSG_WARN(gif library not available - no gif_lib.h)
-  )
-  LIBCHECK_EPILOGUE([GIF])
-
-  if test "$gif_support" = "yes" -a \
-          "$enable_libwebpdemux" = "yes"; then
-    build_anim_diff=yes
-  else
-    AC_MSG_NOTICE(
-      [Not building anim_diff. libgif and --enable-libwebpdemux are required.])
-  fi
-
-  if test "$gif_support" = "yes" -a \
-          "$enable_libwebpmux" = "yes"; then
-    build_gif2webp=yes
-  else
-    AC_MSG_NOTICE(
-      [Not building gif2webp. libgif and --enable-libwebpmux are required.])
-  fi
-])
-AM_CONDITIONAL([BUILD_ANIMDIFF], [test "${build_anim_diff}" = "yes"])
-AM_CONDITIONAL([BUILD_GIF2WEBP], [test "${build_gif2webp}" = "yes"])
-
-if test "$enable_libwebpdemux" = "yes" -a "$enable_libwebpmux" = "yes"; then
-  build_img2webp=yes
-else
-  AC_MSG_NOTICE(
-    m4_normalize([Not building img2webp.
-                  --enable-libwebpdemux & --enable-libwebpmux are required.]))
-fi
-AM_CONDITIONAL([BUILD_IMG2WEBP], [test "${build_img2webp}" = "yes"])
-
-if test "$enable_libwebpmux" = "yes"; then
-  build_webpinfo=yes
-else
-  AC_MSG_NOTICE([Not building webpinfo. --enable-libwebpdemux is required.])
-fi
-AM_CONDITIONAL([BUILD_WEBPINFO], [test "${build_webpinfo}" = "yes"])
-
-dnl === check for WIC support ===
-
-AC_ARG_ENABLE([wic],
-              AS_HELP_STRING([--disable-wic],
-                             [Disable Windows Imaging Component (WIC) detection.
-                              @<:@default=auto@:>@]),,
-              [enable_wic=yes])
-
-case $host_os in
-mingw*)
-if test "$enable_wic" = "yes"; then
-  AC_CHECK_HEADERS([wincodec.h shlwapi.h windows.h])
-  if test "$ac_cv_header_wincodec_h" = "yes"; then
-    AC_MSG_CHECKING(for Windows Imaging Component support)
-    SAVED_LIBS=$LIBS
-    LIBS="-lshlwapi -lole32 $LIBS"
-    # match include structure from [cd]webp.c
-    wic_headers="
-      #define INITGUID
-      #define CINTERFACE
-      #define COBJMACROS
-      #define _WIN32_IE 0x500
-
-      #include <shlwapi.h>
-      #include <windows.h>
-      #include <wincodec.h>
-      "
-    # test for functions from each lib and the GUID is created properly
-    wic_main="
-      int main(void) {
-        CLSID_WICImagingFactory;
-        CoInitialize(NULL);
-        SHCreateStreamOnFile(NULL, 0, NULL);
-        return 0;
-      }
-      "
-    AC_LANG_PUSH(C)
-    AC_LINK_IFELSE(
-      [AC_LANG_SOURCE([
-         $wic_headers
-         $wic_main])],
-      [wic_support=yes],
-      [wic_support=no]
-    )
-    AC_LANG_POP
-
-    test "$wic_support" = "yes" || LIBS=$SAVED_LIBS
-    AC_MSG_RESULT(${wic_support-no})
-  fi
-fi
-esac
-
-dnl === If --enable-swap-16bit-csp is defined, add -DWEBP_SWAP_16BIT_CSP=1
-
-USE_SWAP_16BIT_CSP=""
-AC_MSG_CHECKING(if --enable-swap-16bit-csp option is specified)
-AC_ARG_ENABLE([swap-16bit-csp],
-              AS_HELP_STRING([--enable-swap-16bit-csp],
-                             [Enable byte swap for 16 bit colorspaces]))
-if test "$enable_swap_16bit_csp" = "yes"; then
-  USE_SWAP_16BIT_CSP="-DWEBP_SWAP_16BIT_CSP=1"
-fi
-AC_MSG_RESULT(${enable_swap_16bit_csp-no})
-AC_SUBST(USE_SWAP_16BIT_CSP)
-
-dnl === If --disable-near-lossless is defined, add -DWEBP_NEAR_LOSSLESS=0
-
-AC_DEFINE(WEBP_NEAR_LOSSLESS, [1], [Enable near lossless encoding])
-AC_MSG_CHECKING(if --disable-near-lossless option is specified)
-AC_ARG_ENABLE([near_lossless],
-              AS_HELP_STRING([--disable-near-lossless],
-                             [Disable near lossless encoding]),
-              [], [enable_near_lossless=yes])
-if test "$enable_near_lossless" = "no"; then
-  AC_DEFINE(WEBP_NEAR_LOSSLESS, [0], [Enable near lossless encoding])
-  AC_MSG_RESULT([yes])
-else
-  AC_MSG_RESULT([no])
-fi
-
-dnl =========================
-
-dnl Add an empty webp_libname_prefix variable for use in *.pc.in.
-AC_SUBST([webp_libname_prefix])
-AC_CONFIG_MACRO_DIR([m4])
-AC_CONFIG_HEADERS([src/webp/config.h])
-AC_CONFIG_FILES([Makefile src/Makefile man/Makefile \
-                 examples/Makefile extras/Makefile imageio/Makefile \
-                 sharpyuv/Makefile sharpyuv/libsharpyuv.pc \
-                 src/dec/Makefile src/enc/Makefile src/dsp/Makefile \
-                 src/demux/Makefile src/mux/Makefile \
-                 src/utils/Makefile \
-                 src/libwebp.pc src/libwebpdecoder.pc \
-                 src/demux/libwebpdemux.pc src/mux/libwebpmux.pc])
-
-
-AC_OUTPUT
-
-AC_MSG_NOTICE([
-WebP Configuration Summary
---------------------------
-
-Shared libraries: ${enable_shared}
-Static libraries: ${enable_static}
-Threading support: ${enable_threading-no}
-libwebp: yes
-libwebpdecoder: ${enable_libwebpdecoder-no}
-libwebpdemux: ${enable_libwebpdemux-no}
-libwebpmux: ${enable_libwebpmux-no}
-libwebpextras: ${enable_libwebpextras-no}
-
-Tools:
-cwebp : ${enable_libwebpdemux-no}
-  Input format support
-  ====================
-  JPEG : ${jpeg_support-no}
-  PNG  : ${png_support-no}
-  TIFF : ${tiff_support-no}
-  WIC  : ${wic_support-no}
-dwebp : ${enable_libwebpdemux-no}
-  Output format support
-  =====================
-  PNG  : ${png_support-no}
-  WIC  : ${wic_support-no}
-GIF support : ${gif_support-no}
-anim_diff   : ${build_anim_diff-no}
-gif2webp    : ${build_gif2webp-no}
-img2webp    : ${build_img2webp-no}
-webpmux     : ${enable_libwebpmux-no}
-vwebp       : ${build_vwebp-no}
-webpinfo    : ${build_webpinfo-no}
-SDL support : ${sdl_support-no}
-vwebp_sdl   : ${build_vwebp_sdl-no}
-])

external/libwebp/libwebp/doc/TODO

@@ -1,13 +0,0 @@
-<louquillio@google.com>, 20111004
-
-* Determine that normative RFC 2119 terms (MUST, SHOULD, MAY, etc.) are
-  truly intended in all cases where capitalized.
-
-* Several passages could be made clearer.
-
-  * Overall edit for scope.  Portions are phrased as an introduction to
-    the 0.1.3 RIFF container additions, rather than a holistic guide to
-    WebP.
-
-  * To wit, suggest s/[spec|specification]/guide/g .  "Spec" can imply a
-    standards track; in any case it's too formal for a work in progress.

external/libwebp/libwebp/doc/api.md

@@ -1,385 +0,0 @@
-# WebP APIs
-
-## Encoding API
-
-The main encoding functions are available in the header src/webp/encode.h
-
-The ready-to-use ones are:
-
-```c
-size_t WebPEncodeRGB(const uint8_t* rgb, int width, int height, int stride,
-                     float quality_factor, uint8_t** output);
-size_t WebPEncodeBGR(const uint8_t* bgr, int width, int height, int stride,
-                     float quality_factor, uint8_t** output);
-size_t WebPEncodeRGBA(const uint8_t* rgba, int width, int height, int stride,
-                      float quality_factor, uint8_t** output);
-size_t WebPEncodeBGRA(const uint8_t* bgra, int width, int height, int stride,
-                      float quality_factor, uint8_t** output);
-```
-
-They will convert raw RGB samples to a WebP data. The only control supplied is
-the quality factor.
-
-There are some variants for using the lossless format:
-
-```c
-size_t WebPEncodeLosslessRGB(const uint8_t* rgb, int width, int height,
-                             int stride, uint8_t** output);
-size_t WebPEncodeLosslessBGR(const uint8_t* bgr, int width, int height,
-                             int stride, uint8_t** output);
-size_t WebPEncodeLosslessRGBA(const uint8_t* rgba, int width, int height,
-                              int stride, uint8_t** output);
-size_t WebPEncodeLosslessBGRA(const uint8_t* bgra, int width, int height,
-                              int stride, uint8_t** output);
-```
-
-Of course in this case, no quality factor is needed since the compression occurs
-without loss of the input values, at the expense of larger output sizes.
-
-### Advanced encoding API
-
-A more advanced API is based on the WebPConfig and WebPPicture structures.
-
-WebPConfig contains the encoding settings and is not tied to a particular
-picture. WebPPicture contains input data, on which some WebPConfig will be used
-for compression. The encoding flow looks like:
-
-```c
-#include <webp/encode.h>
-
-// Setup a config, starting form a preset and tuning some additional
-// parameters
-WebPConfig config;
-if (!WebPConfigPreset(&config, WEBP_PRESET_PHOTO, quality_factor)) {
-  return 0;   // version error
-}
-// ... additional tuning
-config.sns_strength = 90;
-config.filter_sharpness = 6;
-config_error = WebPValidateConfig(&config);  // not mandatory, but useful
-
-// Setup the input data
-WebPPicture pic;
-if (!WebPPictureInit(&pic)) {
-  return 0;  // version error
-}
-pic.width = width;
-pic.height = height;
-// allocated picture of dimension width x height
-if (!WebPPictureAlloc(&pic)) {
-  return 0;   // memory error
-}
-// at this point, 'pic' has been initialized as a container,
-// and can receive the Y/U/V samples.
-// Alternatively, one could use ready-made import functions like
-// WebPPictureImportRGB(), which will take care of memory allocation.
-// In any case, past this point, one will have to call
-// WebPPictureFree(&pic) to reclaim memory.
-
-// Set up a byte-output write method. WebPMemoryWriter, for instance.
-WebPMemoryWriter wrt;
-WebPMemoryWriterInit(&wrt);     // initialize 'wrt'
-
-pic.writer = MyFileWriter;
-pic.custom_ptr = my_opaque_structure_to_make_MyFileWriter_work;
-
-// Compress!
-int ok = WebPEncode(&config, &pic);   // ok = 0 => error occurred!
-WebPPictureFree(&pic);  // must be called independently of the 'ok' result.
-
-// output data should have been handled by the writer at that point.
-// -> compressed data is the memory buffer described by wrt.mem / wrt.size
-
-// deallocate the memory used by compressed data
-WebPMemoryWriterClear(&wrt);
-```
-
-## Decoding API
-
-This is mainly just one function to call:
-
-```c
-#include "webp/decode.h"
-uint8_t* WebPDecodeRGB(const uint8_t* data, size_t data_size,
-                       int* width, int* height);
-```
-
-Please have a look at the file src/webp/decode.h for the details. There are
-variants for decoding in BGR/RGBA/ARGB/BGRA order, along with decoding to raw
-Y'CbCr samples. One can also decode the image directly into a pre-allocated
-buffer.
-
-To detect a WebP file and gather the picture's dimensions, the function:
-
-```c
-int WebPGetInfo(const uint8_t* data, size_t data_size,
-                int* width, int* height);
-```
-
-is supplied. No decoding is involved when using it.
-
-### Incremental decoding API
-
-In the case when data is being progressively transmitted, pictures can still be
-incrementally decoded using a slightly more complicated API. Decoder state is
-stored into an instance of the WebPIDecoder object. This object can be created
-with the purpose of decoding either RGB or Y'CbCr samples. For instance:
-
-```c
-WebPDecBuffer buffer;
-WebPInitDecBuffer(&buffer);
-buffer.colorspace = MODE_BGR;
-...
-WebPIDecoder* idec = WebPINewDecoder(&buffer);
-```
-
-As data is made progressively available, this incremental-decoder object can be
-used to decode the picture further. There are two (mutually exclusive) ways to
-pass freshly arrived data:
-
-either by appending the fresh bytes:
-
-```c
-WebPIAppend(idec, fresh_data, size_of_fresh_data);
-```
-
-or by just mentioning the new size of the transmitted data:
-
-```c
-WebPIUpdate(idec, buffer, size_of_transmitted_buffer);
-```
-
-Note that 'buffer' can be modified between each call to WebPIUpdate, in
-particular when the buffer is resized to accommodate larger data.
-
-These functions will return the decoding status: either VP8_STATUS_SUSPENDED if
-decoding is not finished yet or VP8_STATUS_OK when decoding is done. Any other
-status is an error condition.
-
-The 'idec' object must always be released (even upon an error condition) by
-calling: WebPDelete(idec).
-
-To retrieve partially decoded picture samples, one must use the corresponding
-method: WebPIDecGetRGB or WebPIDecGetYUVA. It will return the last displayable
-pixel row.
-
-Lastly, note that decoding can also be performed into a pre-allocated pixel
-buffer. This buffer must be passed when creating a WebPIDecoder, calling
-WebPINewRGB() or WebPINewYUVA().
-
-Please have a look at the src/webp/decode.h header for further details.
-
-### Advanced Decoding API
-
-WebP decoding supports an advanced API which provides on-the-fly cropping and
-rescaling, something of great usefulness on memory-constrained environments like
-mobile phones. Basically, the memory usage will scale with the output's size,
-not the input's, when one only needs a quick preview or a zoomed in portion of
-an otherwise too-large picture. Some CPU can be saved too, incidentally.
-
-```c
-// A) Init a configuration object
-WebPDecoderConfig config;
-CHECK(WebPInitDecoderConfig(&config));
-
-// B) optional: retrieve the bitstream's features.
-CHECK(WebPGetFeatures(data, data_size, &config.input) == VP8_STATUS_OK);
-
-// C) Adjust 'config' options, if needed
-config.options.no_fancy_upsampling = 1;
-config.options.use_scaling = 1;
-config.options.scaled_width = scaledWidth();
-config.options.scaled_height = scaledHeight();
-// etc.
-
-// D) Specify 'config' output options for specifying output colorspace.
-// Optionally the external image decode buffer can also be specified.
-config.output.colorspace = MODE_BGRA;
-// Optionally, the config.output can be pointed to an external buffer as
-// well for decoding the image. This externally supplied memory buffer
-// should be big enough to store the decoded picture.
-config.output.u.RGBA.rgba = (uint8_t*) memory_buffer;
-config.output.u.RGBA.stride = scanline_stride;
-config.output.u.RGBA.size = total_size_of_the_memory_buffer;
-config.output.is_external_memory = 1;
-
-// E) Decode the WebP image. There are two variants w.r.t decoding image.
-// The first one (E.1) decodes the full image and the second one (E.2) is
-// used to incrementally decode the image using small input buffers.
-// Any one of these steps can be used to decode the WebP image.
-
-// E.1) Decode full image.
-CHECK(WebPDecode(data, data_size, &config) == VP8_STATUS_OK);
-
-// E.2) Decode image incrementally.
-WebPIDecoder* const idec = WebPIDecode(NULL, NULL, &config);
-CHECK(idec != NULL);
-while (bytes_remaining > 0) {
-  VP8StatusCode status = WebPIAppend(idec, input, bytes_read);
-  if (status == VP8_STATUS_OK || status == VP8_STATUS_SUSPENDED) {
-    bytes_remaining -= bytes_read;
-  } else {
-    break;
-  }
-}
-WebPIDelete(idec);
-
-// F) Decoded image is now in config.output (and config.output.u.RGBA).
-// It can be saved, displayed or otherwise processed.
-
-// G) Reclaim memory allocated in config's object. It's safe to call
-// this function even if the memory is external and wasn't allocated
-// by WebPDecode().
-WebPFreeDecBuffer(&config.output);
-```
-
-## WebP Mux
-
-WebPMux is a set of two libraries 'Mux' and 'Demux' for creation, extraction and
-manipulation of an extended format WebP file, which can have features like color
-profile, metadata and animation. Reference command-line tools `webpmux` and
-`vwebp` as well as the WebP container specification
-'doc/webp-container-spec.txt' are also provided in this package, see the
-[tools documentation](tools.md).
-
-### Mux API
-
-The Mux API contains methods for adding data to and reading data from WebP
-files. This API currently supports XMP/EXIF metadata, ICC profile and animation.
-Other features may be added in subsequent releases.
-
-Example#1 (pseudo code): Creating a WebPMux object with image data, color
-profile and XMP metadata.
-
-```c
-int copy_data = 0;
-WebPMux* mux = WebPMuxNew();
-// ... (Prepare image data).
-WebPMuxSetImage(mux, &image, copy_data);
-// ... (Prepare ICC profile data).
-WebPMuxSetChunk(mux, "ICCP", &icc_profile, copy_data);
-// ... (Prepare XMP metadata).
-WebPMuxSetChunk(mux, "XMP ", &xmp, copy_data);
-// Get data from mux in WebP RIFF format.
-WebPMuxAssemble(mux, &output_data);
-WebPMuxDelete(mux);
-// ... (Consume output_data; e.g. write output_data.bytes to file).
-WebPDataClear(&output_data);
-```
-
-Example#2 (pseudo code): Get image and color profile data from a WebP file.
-
-```c
-int copy_data = 0;
-// ... (Read data from file).
-WebPMux* mux = WebPMuxCreate(&data, copy_data);
-WebPMuxGetFrame(mux, 1, &image);
-// ... (Consume image; e.g. call WebPDecode() to decode the data).
-WebPMuxGetChunk(mux, "ICCP", &icc_profile);
-// ... (Consume icc_profile).
-WebPMuxDelete(mux);
-free(data);
-```
-
-For a detailed Mux API reference, please refer to the header file
-(src/webp/mux.h).
-
-### Demux API
-
-The Demux API enables extraction of images and extended format data from WebP
-files. This API currently supports reading of XMP/EXIF metadata, ICC profile and
-animated images. Other features may be added in subsequent releases.
-
-Code example: Demuxing WebP data to extract all the frames, ICC profile and
-EXIF/XMP metadata.
-
-```c
-WebPDemuxer* demux = WebPDemux(&webp_data);
-uint32_t width = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH);
-uint32_t height = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT);
-// ... (Get information about the features present in the WebP file).
-uint32_t flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS);
-
-// ... (Iterate over all frames).
-WebPIterator iter;
-if (WebPDemuxGetFrame(demux, 1, &iter)) {
-  do {
-    // ... (Consume 'iter'; e.g. Decode 'iter.fragment' with WebPDecode(),
-    // ... and get other frame properties like width, height, offsets etc.
-    // ... see 'struct WebPIterator' below for more info).
-  } while (WebPDemuxNextFrame(&iter));
-  WebPDemuxReleaseIterator(&iter);
-}
-
-// ... (Extract metadata).
-WebPChunkIterator chunk_iter;
-if (flags & ICCP_FLAG) WebPDemuxGetChunk(demux, "ICCP", 1, &chunk_iter);
-// ... (Consume the ICC profile in 'chunk_iter.chunk').
-WebPDemuxReleaseChunkIterator(&chunk_iter);
-if (flags & EXIF_FLAG) WebPDemuxGetChunk(demux, "EXIF", 1, &chunk_iter);
-// ... (Consume the EXIF metadata in 'chunk_iter.chunk').
-WebPDemuxReleaseChunkIterator(&chunk_iter);
-if (flags & XMP_FLAG) WebPDemuxGetChunk(demux, "XMP ", 1, &chunk_iter);
-// ... (Consume the XMP metadata in 'chunk_iter.chunk').
-WebPDemuxReleaseChunkIterator(&chunk_iter);
-WebPDemuxDelete(demux);
-```
-
-For a detailed Demux API reference, please refer to the header file
-(src/webp/demux.h).
-
-## AnimEncoder API
-
-The AnimEncoder API can be used to create animated WebP images.
-
-Code example:
-
-```c
-WebPAnimEncoderOptions enc_options;
-WebPAnimEncoderOptionsInit(&enc_options);
-// ... (Tune 'enc_options' as needed).
-WebPAnimEncoder* enc = WebPAnimEncoderNew(width, height, &enc_options);
-while(<there are more frames>) {
-  WebPConfig config;
-  WebPConfigInit(&config);
-  // ... (Tune 'config' as needed).
-  WebPAnimEncoderAdd(enc, frame, duration, &config);
-}
-WebPAnimEncoderAssemble(enc, webp_data);
-WebPAnimEncoderDelete(enc);
-// ... (Write the 'webp_data' to a file, or re-mux it further).
-```
-
-For a detailed AnimEncoder API reference, please refer to the header file
-(src/webp/mux.h).
-
-## AnimDecoder API
-
-This AnimDecoder API allows decoding (possibly) animated WebP images.
-
-Code Example:
-
-```c
-WebPAnimDecoderOptions dec_options;
-WebPAnimDecoderOptionsInit(&dec_options);
-// Tune 'dec_options' as needed.
-WebPAnimDecoder* dec = WebPAnimDecoderNew(webp_data, &dec_options);
-WebPAnimInfo anim_info;
-WebPAnimDecoderGetInfo(dec, &anim_info);
-for (uint32_t i = 0; i < anim_info.loop_count; ++i) {
-  while (WebPAnimDecoderHasMoreFrames(dec)) {
-    uint8_t* buf;
-    int timestamp;
-    WebPAnimDecoderGetNext(dec, &buf, &timestamp);
-    // ... (Render 'buf' based on 'timestamp').
-    // ... (Do NOT free 'buf', as it is owned by 'dec').
-  }
-  WebPAnimDecoderReset(dec);
-}
-const WebPDemuxer* demuxer = WebPAnimDecoderGetDemuxer(dec);
-// ... (Do something using 'demuxer'; e.g. get EXIF/XMP/ICC data).
-WebPAnimDecoderDelete(dec);
-```
-
-For a detailed AnimDecoder API reference, please refer to the header file
-(src/webp/demux.h).

external/libwebp/libwebp/doc/building.md

@@ -1,213 +0,0 @@
-# Building
-
-## Windows build
-
-By running:
-
-```batch
-nmake /f Makefile.vc CFG=release-static RTLIBCFG=static OBJDIR=output
-```
-
-the directory `output\release-static\(x64|x86)\bin` will contain the tools
-cwebp.exe and dwebp.exe. The directory `output\release-static\(x64|x86)\lib`
-will contain the libwebp static library. The target architecture (x86/x64) is
-detected by Makefile.vc from the Visual Studio compiler (cl.exe) available in
-the system path.
-
-## Unix build using makefile.unix
-
-On platforms with GNU tools installed (gcc and make), running
-
-```shell
-make -f makefile.unix
-```
-
-will build the binaries examples/cwebp and examples/dwebp, along with the static
-library src/libwebp.a. No system-wide installation is supplied, as this is a
-simple alternative to the full installation system based on the autoconf tools
-(see below). Please refer to makefile.unix for additional details and
-customizations.
-
-## Using autoconf tools
-
-Prerequisites: a compiler (e.g., gcc), make, autoconf, automake, libtool.
-
-On a Debian-like system the following should install everything you need for a
-minimal build:
-
-```shell
-$ sudo apt-get install gcc make autoconf automake libtool
-```
-
-When building from git sources, you will need to run autogen.sh to generate the
-configure script.
-
-```shell
-./configure
-make
-make install
-```
-
-should be all you need to have the following files
-
-```
-/usr/local/include/webp/decode.h
-/usr/local/include/webp/encode.h
-/usr/local/include/webp/types.h
-/usr/local/lib/libwebp.*
-/usr/local/bin/cwebp
-/usr/local/bin/dwebp
-```
-
-installed.
-
-Note: A decode-only library, libwebpdecoder, is available using the
-`--enable-libwebpdecoder` flag. The encode library is built separately and can
-be installed independently using a minor modification in the corresponding
-Makefile.am configure files (see comments there). See `./configure --help` for
-more options.
-
-## Building for MIPS Linux
-
-MIPS Linux toolchain stable available releases can be found at:
-https://community.imgtec.com/developers/mips/tools/codescape-mips-sdk/available-releases/
-
-```shell
-# Add toolchain to PATH
-export PATH=$PATH:/path/to/toolchain/bin
-
-# 32-bit build for mips32r5 (p5600)
-HOST=mips-mti-linux-gnu
-MIPS_CFLAGS="-O3 -mips32r5 -mabi=32 -mtune=p5600 -mmsa -mfp64 \
-  -msched-weight -mload-store-pairs -fPIE"
-MIPS_LDFLAGS="-mips32r5 -mabi=32 -mmsa -mfp64 -pie"
-
-# 64-bit build for mips64r6 (i6400)
-HOST=mips-img-linux-gnu
-MIPS_CFLAGS="-O3 -mips64r6 -mabi=64 -mtune=i6400 -mmsa -mfp64 \
-  -msched-weight -mload-store-pairs -fPIE"
-MIPS_LDFLAGS="-mips64r6 -mabi=64 -mmsa -mfp64 -pie"
-
-./configure --host=${HOST} --build=`config.guess` \
-  CC="${HOST}-gcc -EL" \
-  CFLAGS="$MIPS_CFLAGS" \
-  LDFLAGS="$MIPS_LDFLAGS"
-make
-make install
-```
-
-## CMake
-
-With CMake, you can compile libwebp, cwebp, dwebp, gif2webp, img2webp, webpinfo
-and the JS bindings.
-
-Prerequisites: a compiler (e.g., gcc with autotools) and CMake.
-
-On a Debian-like system the following should install everything you need for a
-minimal build:
-
-```shell
-$ sudo apt-get install build-essential cmake
-```
-
-When building from git sources, you will need to run cmake to generate the
-makefiles.
-
-```shell
-mkdir build && cd build && cmake ../
-make
-make install
-```
-
-If you also want any of the executables, you will need to enable them through
-CMake, e.g.:
-
-```shell
-cmake -DWEBP_BUILD_CWEBP=ON -DWEBP_BUILD_DWEBP=ON ../
-```
-
-or through your favorite interface (like ccmake or cmake-qt-gui).
-
-Use option `-DWEBP_UNICODE=ON` for Unicode support on Windows (with chcp 65001).
-
-Finally, once installed, you can also use WebP in your CMake project by doing:
-
-```cmake
-find_package(WebP)
-```
-
-which will define the CMake variables WebP_INCLUDE_DIRS and WebP_LIBRARIES.
-
-## Gradle
-
-The support for Gradle is minimal: it only helps you compile libwebp, cwebp and
-dwebp and webpmux_example.
-
-Prerequisites: a compiler (e.g., gcc with autotools) and gradle.
-
-On a Debian-like system the following should install everything you need for a
-minimal build:
-
-```shell
-$ sudo apt-get install build-essential gradle
-```
-
-When building from git sources, you will need to run the Gradle wrapper with the
-appropriate target, e.g. :
-
-```shell
-./gradlew buildAllExecutables
-```
-
-## SWIG bindings
-
-To generate language bindings from swig/libwebp.swig at least swig-1.3
-(http://www.swig.org) is required.
-
-Currently the following functions are mapped:
-
-Decode:
-
-```
-WebPGetDecoderVersion
-WebPGetInfo
-WebPDecodeRGBA
-WebPDecodeARGB
-WebPDecodeBGRA
-WebPDecodeBGR
-WebPDecodeRGB
-```
-
-Encode:
-
-```
-WebPGetEncoderVersion
-WebPEncodeRGBA
-WebPEncodeBGRA
-WebPEncodeRGB
-WebPEncodeBGR
-WebPEncodeLosslessRGBA
-WebPEncodeLosslessBGRA
-WebPEncodeLosslessRGB
-WebPEncodeLosslessBGR
-```
-
-See also the [swig documentation](../swig/README.md) for more detailed build
-instructions and usage examples.
-
-### Java bindings
-
-To build the swig-generated JNI wrapper code at least JDK-1.5 (or equivalent) is
-necessary for enum support. The output is intended to be a shared object / DLL
-that can be loaded via `System.loadLibrary("webp_jni")`.
-
-### Python bindings
-
-To build the swig-generated Python extension code at least Python 2.6 is
-required. Python < 2.6 may build with some minor changes to libwebp.swig or the
-generated code, but is untested.
-
-## Javascript decoder
-
-Libwebp can be compiled into a JavaScript decoder using Emscripten and CMake.
-See the [corresponding documentation](../README.md)

external/libwebp/libwebp/doc/specs_generation.md

@@ -1,26 +0,0 @@
-# Generate libwebp Container Spec Docs from Text Source
-
-HTML generation requires [kramdown](https://kramdown.gettalong.org/), easily
-installed as a [rubygem](https://rubygems.org/). Rubygems installation should
-satisfy dependencies automatically.
-
-HTML generation can then be done from the project root:
-
-```shell
-$ kramdown doc/webp-container-spec.txt --template doc/template.html > \
-  doc/output/webp-container-spec.html
-```
-
-kramdown can optionally syntax highlight code blocks, using
-[CodeRay](https://github.com/rubychan/coderay), a dependency of kramdown that
-rubygems will install automatically. The following will apply inline CSS
-styling; an external stylesheet is not needed.
-
-```shell
-$ kramdown doc/webp-lossless-bitstream-spec.txt --template \
-  doc/template.html --coderay-css style --coderay-line-numbers ' ' \
-  --coderay-default-lang c > \
-  doc/output/webp-lossless-bitstream-spec.html
-```
-
-Optimally, use kramdown 0.13.7 or newer if syntax highlighting desired.

external/libwebp/libwebp/doc/template.html

@@ -1,94 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="utf-8">
-  <title>WebP Container Specification</title>
-  <meta name="generator" content="kramdown <%= ::Kramdown::VERSION %>" />
-  <style type="text/css">
-  body {
-    color: #000;
-    background-color: #fff;
-    margin: 10%;
-    font-family: "Liberation Sans", "DejaVu Sans", "Bitstream Vera Sans", Arial, sans-serif;
-    line-height: 1.4;
-  }
-  h2 {
-    border-bottom: 1px solid #ccc;
-    padding-bottom: 0;
-  }
-  table {
-    border-collapse: collapse;
-  }
-  th, td {
-    border: 1px solid #999;
-    padding: .5em .7em;;
-  }
-  th {
-    color: #fff;
-    background-color: #000;
-  }
-  td {
-  }
-  hr {
-  }
-  code {
-    color: #000;
-    background-color: #f7f7f7;
-    padding: 0 3px;
-    font-family: "Liberation Mono", "DejaVu Sans Mono", "Bitstream Vera Sans Mono", Consolata, monospace;
-  }
-  pre {
-    background-color: #f7f7f7;
-    padding: 1em;
-    border: 1px solid #ccc;
-    width: 42em;
-    overflow: auto;
-    font-family: "Liberation Mono", "DejaVu Sans Mono", "Bitstream Vera Sans Mono", Consolata, monospace;
-  }
-  pre code {
-    background-color: #f7f7f7;
-    padding: 0; /* Only want padding on inline code, not blocks */
-  }
-  pre.terminal {
-    color: #fff;
-    background-color: #000;
-    border: 1px solid #ccc;
-    max-height: 30em;
-  }
-  pre.terminal code {
-    color: #fff;
-    background-color: #000;
-    font-size: smaller;
-  }
-  #markdown-toc ul {
-    list-style-type: disc;
-  }
-  ul#markdown-toc {
-    margin-top: -1em;
-    visibility: hidden;
-    -webkit-padding-start: 0;
-  }
-  ul#markdown-toc ul {
-    visibility: visible;
-  }
-  ul#markdown-toc ul ul{
-    visibility: visible;
-  }
-  ul#markdown-toc + hr {
-    margin-bottom: 4em;
-  }
-  ol ol { /* Format nested ordered lists */
-    list-style-type: lower-alpha;
-  }
-  dt {
-    font-style: italic;
-    font-weight: bold;
-  }
-  .caption {
-  }
-  </style>
-</head>
-<body>
-<%= @body %>
-</body>
-</html>

external/libwebp/libwebp/doc/tools.md

@@ -1,516 +0,0 @@
-# WebP tools
-
-## Encoding tool
-
-The examples/ directory contains tools for encoding (cwebp) and decoding (dwebp)
-images.
-
-The easiest use should look like:
-
-```shell
-cwebp input.png -q 80 -o output.webp
-```
-
-which will convert the input file to a WebP file using a quality factor of 80 on
-a 0->100 scale (0 being the lowest quality, 100 being the best. Default value is
-75).
-
-You might want to try the `-lossless` flag too, which will compress the source
-(in RGBA format) without any loss. The `-q` quality parameter will in this case
-control the amount of processing time spent trying to make the output file as
-small as possible.
-
-A longer list of options is available using the `-longhelp` command line flag:
-
-```shell
-> cwebp -longhelp
-Usage:
- cwebp [-preset <...>] [options] in_file [-o out_file]
-```
-
-If input size (-s) for an image is not specified, it is assumed to be a PNG,
-JPEG, TIFF or WebP file. Note: Animated PNG and WebP files are not supported.
-
-Options:
-
-```
--h / -help ............. short help
--H / -longhelp ......... long help
--q <float> ............. quality factor (0:small..100:big), default=75
--alpha_q <int> ......... transparency-compression quality (0..100),
-                         default=100
--preset <string> ....... preset setting, one of:
-                          default, photo, picture,
-                          drawing, icon, text
-   -preset must come first, as it overwrites other parameters
--z <int> ............... activates lossless preset with given
-                         level in [0:fast, ..., 9:slowest]
-
--m <int> ............... compression method (0=fast, 6=slowest), default=4
--segments <int> ........ number of segments to use (1..4), default=4
--size <int> ............ target size (in bytes)
--psnr <float> .......... target PSNR (in dB. typically: 42)
-
--s <int> <int> ......... input size (width x height) for YUV
--sns <int> ............. spatial noise shaping (0:off, 100:max), default=50
--f <int> ............... filter strength (0=off..100), default=60
--sharpness <int> ....... filter sharpness (0:most .. 7:least sharp), default=0
--strong ................ use strong filter instead of simple (default)
--nostrong .............. use simple filter instead of strong
--sharp_yuv ............. use sharper (and slower) RGB->YUV conversion
--partition_limit <int> . limit quality to fit the 512k limit on
-                         the first partition (0=no degradation ... 100=full)
--pass <int> ............ analysis pass number (1..10)
--qrange <min> <max> .... specifies the permissible quality range
-                         (default: 0 100)
--crop <x> <y> <w> <h> .. crop picture with the given rectangle
--resize <w> <h> ........ resize picture (*after* any cropping)
--mt .................... use multi-threading if available
--low_memory ............ reduce memory usage (slower encoding)
--map <int> ............. print map of extra info
--print_psnr ............ prints averaged PSNR distortion
--print_ssim ............ prints averaged SSIM distortion
--print_lsim ............ prints local-similarity distortion
--d <file.pgm> .......... dump the compressed output (PGM file)
--alpha_method <int> .... transparency-compression method (0..1), default=1
--alpha_filter <string> . predictive filtering for alpha plane,
-                         one of: none, fast (default) or best
--exact ................. preserve RGB values in transparent area, default=off
--blend_alpha <hex> ..... blend colors against background color
-                         expressed as RGB values written in
-                         hexadecimal, e.g. 0xc0e0d0 for red=0xc0
-                         green=0xe0 and blue=0xd0
--noalpha ............... discard any transparency information
--lossless .............. encode image losslessly, default=off
--near_lossless <int> ... use near-lossless image preprocessing
-                         (0..100=off), default=100
--hint <string> ......... specify image characteristics hint,
-                         one of: photo, picture or graph
-
--metadata <string> ..... comma separated list of metadata to
-                         copy from the input to the output if present.
-                         Valid values: all, none (default), exif, icc, xmp
-
--short ................. condense printed message
--quiet ................. don't print anything
--version ............... print version number and exit
--noasm ................. disable all assembly optimizations
--v ..................... verbose, e.g. print encoding/decoding times
--progress .............. report encoding progress
-```
-
-Experimental Options:
-
-```
--jpeg_like ............. roughly match expected JPEG size
--af .................... auto-adjust filter strength
--pre <int> ............. pre-processing filter
-```
-
-The main options you might want to try in order to further tune the visual
-quality are:
-
--preset -sns -f -m
-
-Namely:
-
-*   `preset` will set up a default encoding configuration targeting a particular
-    type of input. It should appear first in the list of options, so that
-    subsequent options can take effect on top of this preset. Default value is
-    'default'.
-*   `sns` will progressively turn on (when going from 0 to 100) some additional
-    visual optimizations (like: segmentation map re-enforcement). This option
-    will balance the bit allocation differently. It tries to take bits from the
-    "easy" parts of the picture and use them in the "difficult" ones instead.
-    Usually, raising the sns value (at fixed -q value) leads to larger files,
-    but with better quality. Typical value is around '75'.
-*   `f` option directly links to the filtering strength used by the codec's
-    in-loop processing. The higher the value, the smoother the highly-compressed
-    area will look. This is particularly useful when aiming at very small files.
-    Typical values are around 20-30. Note that using the option
-    -strong/-nostrong will change the type of filtering. Use "-f 0" to turn
-    filtering off.
-*   `m` controls the trade-off between encoding speed and quality. Default is 4.
-    You can try -m 5 or -m 6 to explore more (time-consuming) encoding
-    possibilities. A lower value will result in faster encoding at the expense
-    of quality.
-
-## Decoding tool
-
-There is a decoding sample in examples/dwebp.c which will take a .webp file and
-decode it to a PNG image file (amongst other formats). This is simply to
-demonstrate the use of the API. You can verify the file test.webp decodes to
-exactly the same as test_ref.ppm by using:
-
-```shell
-cd examples
-./dwebp test.webp -ppm -o test.ppm
-diff test.ppm test_ref.ppm
-```
-
-The full list of options is available using -h:
-
-```shell
-> dwebp -h
-Usage: dwebp in_file [options] [-o out_file]
-```
-
-Decodes the WebP image file to PNG format [Default]. Note: Animated WebP files
-are not supported.
-
-Use following options to convert into alternate image formats:
-
-```
--pam ......... save the raw RGBA samples as a color PAM
--ppm ......... save the raw RGB samples as a color PPM
--bmp ......... save as uncompressed BMP format
--tiff ........ save as uncompressed TIFF format
--pgm ......... save the raw YUV samples as a grayscale PGM
-               file with IMC4 layout
--yuv ......... save the raw YUV samples in flat layout
-```
-
-Other options are:
-
-```
--version ..... print version number and exit
--nofancy ..... don't use the fancy YUV420 upscaler
--nofilter .... disable in-loop filtering
--nodither .... disable dithering
--dither <d> .. dithering strength (in 0..100)
--alpha_dither  use alpha-plane dithering if needed
--mt .......... use multi-threading
--crop <x> <y> <w> <h> ... crop output with the given rectangle
--resize <w> <h> ......... resize output (*after* any cropping)
--flip ........ flip the output vertically
--alpha ....... only save the alpha plane
--incremental . use incremental decoding (useful for tests)
--h ........... this help message
--v ........... verbose (e.g. print encoding/decoding times)
--quiet ....... quiet mode, don't print anything
--noasm ....... disable all assembly optimizations
-```
-
-## WebP file analysis tool
-
-`webpinfo` can be used to print out the chunk level structure and bitstream
-header information of WebP files. It can also check if the files are of valid
-WebP format.
-
-Usage:
-
-```shell
-webpinfo [options] in_files
-```
-
-Note: there could be multiple input files; options must come before input files.
-
-Options:
-
-```
--version ........... Print version number and exit.
--quiet ............. Do not show chunk parsing information.
--diag .............. Show parsing error diagnosis.
--summary ........... Show chunk stats summary.
--bitstream_info .... Parse bitstream header.
-```
-
-## Visualization tool
-
-There's a little self-serve visualization tool called 'vwebp' under the
-examples/ directory. It uses OpenGL to open a simple drawing window and show a
-decoded WebP file. It's not yet integrated in the automake build system, but you
-can try to manually compile it using the recommendations below.
-
-Usage:
-
-```shell
-vwebp in_file [options]
-```
-
-Decodes the WebP image file and visualize it using OpenGL
-
-Options are:
-
-```
--version ..... print version number and exit
--noicc ....... don't use the icc profile if present
--nofancy ..... don't use the fancy YUV420 upscaler
--nofilter .... disable in-loop filtering
--dither <int>  dithering strength (0..100), default=50
--noalphadither disable alpha plane dithering
--usebgcolor .. display background color
--mt .......... use multi-threading
--info ........ print info
--h ........... this help message
-```
-
-Keyboard shortcuts:
-
-```
-'c' ................ toggle use of color profile
-'b' ................ toggle background color display
-'i' ................ overlay file information
-'d' ................ disable blending & disposal (debug)
-'q' / 'Q' / ESC .... quit
-```
-
-### Building
-
-Prerequisites:
-
-1.  OpenGL & OpenGL Utility Toolkit (GLUT)
-
-    Linux: `sudo apt-get install freeglut3-dev mesa-common-dev`
-
-    Mac + Xcode: These libraries should be available in the OpenGL / GLUT
-    frameworks.
-
-    Windows: http://freeglut.sourceforge.net/index.php#download
-
-2.  (Optional) qcms (Quick Color Management System)
-
-    1.  Download qcms from Mozilla / Chromium:
-        https://hg.mozilla.org/mozilla-central/file/0e7639e3bdfb/gfx/qcms
-        https://source.chromium.org/chromium/chromium/src/+/main:third_party/qcms/;drc=d4a2f8e1ed461d8fc05ed88d1ae2dc94c9773825
-    2.  Build and archive the source files as libqcms.a / qcms.lib
-    3.  Update makefile.unix / Makefile.vc
-        1.  Define WEBP_HAVE_QCMS
-        2.  Update include / library paths to reference the qcms directory.
-
-Build using makefile.unix / Makefile.vc:
-
-```shell
-$ make -f makefile.unix examples/vwebp
-> nmake /f Makefile.vc CFG=release-static \
-    ../obj/x64/release-static/bin/vwebp.exe
-```
-
-## Animation creation tool
-
-The utility `img2webp` can turn a sequence of input images (PNG, JPEG, ...) into
-an animated WebP file. It offers fine control over duration, encoding modes,
-etc.
-
-Usage:
-
-```shell
-img2webp [file_options] [[frame_options] frame_file]... [-o webp_file]
-```
-
-File-level options (only used at the start of compression):
-
-```
--min_size ............ minimize size
--kmax <int> .......... maximum number of frame between key-frames
-                        (0=only keyframes)
--kmin <int> .......... minimum number of frame between key-frames
-                        (0=disable key-frames altogether)
--mixed ............... use mixed lossy/lossless automatic mode
--near_lossless <int> . use near-lossless image preprocessing
-                       (0..100=off), default=100
--sharp_yuv ........... use sharper (and slower) RGB->YUV conversion
-                       (lossy only)
--loop <int> .......... loop count (default: 0, = infinite loop)
--v ................... verbose mode
--h ................... this help
--version ............. print version number and exit
-```
-
-Per-frame options (only used for subsequent images input):
-
-```
--d <int> ............. frame duration in ms (default: 100)
--lossless  ........... use lossless mode (default)
--lossy ... ........... use lossy mode
--q <float> ........... quality
--m <int> ............. method to use
-```
-
-example: `img2webp -loop 2 in0.png -lossy in1.jpg -d 80 in2.tiff -o out.webp`
-
-Note: if a single file name is passed as the argument, the arguments will be
-tokenized from this file. The file name must not start with the character '-'.
-
-## Animated GIF conversion
-
-Animated GIF files can be converted to WebP files with animation using the
-gif2webp utility available under examples/. The files can then be viewed using
-vwebp.
-
-Usage:
-
-```shell
-gif2webp [options] gif_file -o webp_file
-```
-
-Options:
-
-```
--h / -help ............. this help
--lossy ................. encode image using lossy compression
--mixed ................. for each frame in the image, pick lossy
-                         or lossless compression heuristically
--q <float> ............. quality factor (0:small..100:big)
--m <int> ............... compression method (0=fast, 6=slowest)
--min_size .............. minimize output size (default:off)
-                         lossless compression by default; can be
-                         combined with -q, -m, -lossy or -mixed
-                         options
--kmin <int> ............ min distance between key frames
--kmax <int> ............ max distance between key frames
--f <int> ............... filter strength (0=off..100)
--metadata <string> ..... comma separated list of metadata to
-                         copy from the input to the output if present
-                         Valid values: all, none, icc, xmp (default)
--loop_compatibility .... use compatibility mode for Chrome
-                         version prior to M62 (inclusive)
--mt .................... use multi-threading if available
-
--version ............... print version number and exit
--v ..................... verbose
--quiet ................. don't print anything
-```
-
-### Building
-
-With the libgif development files installed, gif2webp can be built using
-makefile.unix:
-
-```shell
-$ make -f makefile.unix examples/gif2webp
-```
-
-or using autoconf:
-
-```shell
-$ ./configure --enable-everything
-$ make
-```
-
-## Comparison of animated images
-
-Test utility anim_diff under examples/ can be used to compare two animated
-images (each can be GIF or WebP).
-
-Usage:
-
-```shell
-anim_diff <image1> <image2> [options]
-```
-
-Options:
-
-```
--dump_frames <folder> dump decoded frames in PAM format
--min_psnr <float> ... minimum per-frame PSNR
--raw_comparison ..... if this flag is not used, RGB is
-                      premultiplied before comparison
--max_diff <int> ..... maximum allowed difference per channel
-                      between corresponding pixels in subsequent
-                      frames
--h .................. this help
--version ............ print version number and exit
-```
-
-### Building
-
-With the libgif development files installed, anim_diff can be built using
-makefile.unix:
-
-```shell
-$ make -f makefile.unix examples/anim_diff
-```
-
-or using autoconf:
-
-```shell
-$ ./configure --enable-everything
-$ make
-```
-
-## WebP Mux tool
-
-The examples/ directory contains a tool (webpmux) for manipulating WebP files.
-The webpmux tool can be used to create an extended format WebP file and also to
-extract or strip relevant data from such a file.
-
-A list of options is available using the -help command line flag:
-
-```shell
-> webpmux -help
-Usage: webpmux -get GET_OPTIONS INPUT -o OUTPUT
-       webpmux -set SET_OPTIONS INPUT -o OUTPUT
-       webpmux -duration DURATION_OPTIONS [-duration ...]
-               INPUT -o OUTPUT
-       webpmux -strip STRIP_OPTIONS INPUT -o OUTPUT
-       webpmux -frame FRAME_OPTIONS [-frame...] [-loop LOOP_COUNT]
-               [-bgcolor BACKGROUND_COLOR] -o OUTPUT
-       webpmux -info INPUT
-       webpmux [-h|-help]
-       webpmux -version
-       webpmux argument_file_name
-
-GET_OPTIONS:
- Extract relevant data:
-   icc       get ICC profile
-   exif      get EXIF metadata
-   xmp       get XMP metadata
-   frame n   get nth frame
-
-SET_OPTIONS:
- Set color profile/metadata/parameters:
-   loop LOOP_COUNT            set the loop count
-   bgcolor BACKGROUND_COLOR   set the animation background color
-   icc  file.icc              set ICC profile
-   exif file.exif             set EXIF metadata
-   xmp  file.xmp              set XMP metadata
-   where:    'file.icc' contains the ICC profile to be set,
-             'file.exif' contains the EXIF metadata to be set
-             'file.xmp' contains the XMP metadata to be set
-
-DURATION_OPTIONS:
- Set duration of selected frames:
-   duration            set duration for all frames
-   duration,frame      set duration of a particular frame
-   duration,start,end  set duration of frames in the
-                        interval [start,end])
-   where: 'duration' is the duration in milliseconds
-          'start' is the start frame index
-          'end' is the inclusive end frame index
-           The special 'end' value '0' means: last frame.
-
-STRIP_OPTIONS:
- Strip color profile/metadata:
-   icc       strip ICC profile
-   exif      strip EXIF metadata
-   xmp       strip XMP metadata
-
-FRAME_OPTIONS(i):
- Create animation:
-   file_i +di[+xi+yi[+mi[bi]]]
-   where:    'file_i' is the i'th animation frame (WebP format),
-             'di' is the pause duration before next frame,
-             'xi','yi' specify the image offset for this frame,
-             'mi' is the dispose method for this frame (0 or 1),
-             'bi' is the blending method for this frame (+b or -b)
-
-LOOP_COUNT:
- Number of times to repeat the animation.
- Valid range is 0 to 65535 [Default: 0 (infinite)].
-
-BACKGROUND_COLOR:
- Background color of the canvas.
-  A,R,G,B
-  where:    'A', 'R', 'G' and 'B' are integers in the range 0 to 255 specifying
-            the Alpha, Red, Green and Blue component values respectively
-            [Default: 255,255,255,255]
-
-INPUT & OUTPUT are in WebP format.
-
-Note: The nature of EXIF, XMP and ICC data is not checked and is assumed to be
-valid.
-
-Note: if a single file name is passed as the argument, the arguments will be
-tokenized from this file. The file name must not start with the character '-'.
-```

external/libwebp/libwebp/doc/webp-container-spec.txt

@@ -1,870 +0,0 @@
-<!--
-
-Although you may be viewing an alternate representation, this document
-is sourced in Markdown, a light-duty markup scheme, and is optimized for
-the [kramdown](https://kramdown.gettalong.org/) transformer.
-
-See the accompanying specs_generation.md. External link targets are referenced
-at the end of this file.
-
--->
-
-
-WebP Container Specification
-============================
-
-* TOC placeholder
-{:toc}
-
-
-Introduction
-------------
-
-WebP is an image format that uses either (i) the VP8 key frame encoding to
-compress image data in a lossy way or (ii) the WebP lossless encoding. These
-encoding schemes should make it more efficient than older formats, such as JPEG,
-GIF, and PNG. It is optimized for fast image transfer over the network (for
-example, for websites). The WebP format has feature parity (color profile,
-metadata, animation, etc.) with other formats as well. This document describes
-the structure of a WebP file.
-
-The WebP container (that is, the RIFF container for WebP) allows feature support
-over and above the basic use case of WebP (that is, a file containing a single
-image encoded as a VP8 key frame). The WebP container provides additional
-support for the following:
-
-  * Lossless Compression: An image can be losslessly compressed, using the
-    WebP Lossless Format.
-
-  * Metadata: An image may have metadata stored in Exchangeable Image File
-    Format (Exif) or Extensible Metadata Platform (XMP) format.
-
-  * Transparency: An image may have transparency, that is, an alpha channel.
-
-  * Color Profile: An image may have an embedded ICC profile as described
-    by the [International Color Consortium][iccspec].
-
-  * Animation: An image may have multiple frames with pauses between them,
-    making it an animation.
-
-Terminology & Basics
---------------------
-
-The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD",
-"SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this
-document are to be interpreted as described in BCP 14 [RFC 2119][] [RFC 8174][]
-when, and only when, they appear in all capitals, as shown here.
-
-A WebP file contains either a still image (that is, an encoded matrix of pixels)
-or an [animation](#animation). Optionally, it can also contain transparency
-information, a color profile and metadata. We refer to the matrix of pixels as
-the _canvas_ of the image.
-
-Bit numbering in chunk diagrams starts at `0` for the most significant bit
-('MSB 0'), as described in [RFC 1166][].
-
-Below are additional terms used throughout this document:
-
-_Reader/Writer_
-
-: Code that reads WebP files is referred to as a _reader_, while code that
-  writes them is referred to as a _writer_.
-
-_uint16_
-
-: A 16-bit, little-endian, unsigned integer.
-
-_uint24_
-
-: A 24-bit, little-endian, unsigned integer.
-
-_uint32_
-
-: A 32-bit, little-endian, unsigned integer.
-
-_FourCC_
-
-: A four-character code (FourCC) is a _uint32_ created by concatenating four
-  ASCII characters in little-endian order. This means 'aaaa' (0x61616161) and
- 'AAAA' (0x41414141) are treated as different _FourCCs_.
-
-_1-based_
-
-: An unsigned integer field storing values offset by `-1`, for example, such a
-  field would store value _25_ as _24_.
-
-_ChunkHeader('ABCD')_
-
-: Used to describe the _FourCC_ and _Chunk Size_ header of individual chunks,
-  where 'ABCD' is the FourCC for the chunk. This element's size is 8 bytes.
-
-
-RIFF File Format
-----------------
-
-The WebP file format is based on the RIFF (Resource Interchange File Format)
-document format.
-
-The basic element of a RIFF file is a _chunk_. It consists of:
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                         Chunk FourCC                          |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                          Chunk Size                           |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                         Chunk Payload                         :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Chunk FourCC: 32 bits
-
-: ASCII four-character code used for chunk identification.
-
-Chunk Size: 32 bits (_uint32_)
-
-: The size of the chunk in bytes, not including this field, the chunk
-  identifier, or padding.
-
-Chunk Payload: _Chunk Size_ bytes
-
-: The data payload. If _Chunk Size_ is odd, a single padding byte -- which MUST
-  be `0` to conform with RIFF -- is added.
-
-**Note:** RIFF has a convention that all-uppercase chunk FourCCs are standard
-chunks that apply to any RIFF file format, while FourCCs specific to a file
-format are all lowercase. WebP does not follow this convention.
-
-
-WebP File Header
-----------------
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |      'R'      |      'I'      |      'F'      |      'F'      |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                           File Size                           |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |      'W'      |      'E'      |      'B'      |      'P'      |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-'RIFF': 32 bits
-
-: The ASCII characters 'R', 'I', 'F', 'F'.
-
-File Size: 32 bits (_uint32_)
-
-: The size of the file in bytes, starting at offset 8. The maximum value of
-  this field is 2^32 minus 10 bytes and thus the size of the whole file is at
-  most 4 GiB minus 2 bytes.
-
-'WEBP': 32 bits
-
-: The ASCII characters 'W', 'E', 'B', 'P'.
-
-A WebP file MUST begin with a RIFF header with the FourCC 'WEBP'. The file size
-in the header is the total size of the chunks that follow plus `4` bytes for
-the 'WEBP' FourCC. The file SHOULD NOT contain any data after the data
-specified by _File Size_. Readers MAY parse such files, ignoring the trailing
-data. As the size of any chunk is even, the size given by the RIFF header is
-also even. The contents of individual chunks are described in the following
-sections.
-
-
-Simple File Format (Lossy)
---------------------------
-
-This layout SHOULD be used if the image requires _lossy_ encoding and does not
-require transparency or other advanced features provided by the extended format.
-Files with this layout are smaller and supported by older software.
-
-Simple WebP (lossy) file format:
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                                                               |
-    |                    WebP file header (12 bytes)                |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                        'VP8 ' Chunk                           :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-'VP8 ' Chunk:
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('VP8 ')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                           VP8 data                            :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-VP8 data: _Chunk Size_ bytes
-
-: VP8 bitstream data.
-
-Note that the fourth character in the 'VP8 ' FourCC is an ASCII space (0x20).
-
-The VP8 bitstream format specification is described in [VP8 Data Format and
-Decoding Guide][rfc 6386]. Note that the VP8 frame header contains the VP8 frame
-width and height. That is assumed to be the width and height of the canvas.
-
-The VP8 specification describes how to decode the image into Y'CbCr format. To
-convert to RGB, [Recommendation BT.601][rec601] SHOULD be used. Applications MAY
-use another conversion method, but visual results may differ among decoders.
-
-
-Simple File Format (Lossless)
------------------------------
-
-**Note:** Older readers may not support files using the lossless format.
-
-This layout SHOULD be used if the image requires _lossless_ encoding (with an
-optional transparency channel) and does not require advanced features provided
-by the extended format.
-
-Simple WebP (lossless) file format:
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                                                               |
-    |                    WebP file header (12 bytes)                |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                         'VP8L' Chunk                          :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-'VP8L' Chunk:
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('VP8L')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                           VP8L data                           :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-VP8L data: _Chunk Size_ bytes
-
-: VP8L bitstream data.
-
-The current specification of the VP8L bitstream can be found at
-[WebP Lossless Bitstream Format][webpllspec]. Note that the VP8L header
-contains the VP8L image width and height. That is assumed to be the width
-and height of the canvas.
-
-
-Extended File Format
---------------------
-
-**Note:** Older readers may not support files using the extended format.
-
-An extended format file consists of:
-
-  * A 'VP8X' Chunk with information about features used in the file.
-
-  * An optional 'ICCP' Chunk with a color profile.
-
-  * An optional 'ANIM' Chunk with animation control data.
-
-  * Image data.
-
-  * An optional 'EXIF' Chunk with Exif metadata.
-
-  * An optional 'XMP ' Chunk with XMP metadata.
-
-  * An optional list of [unknown chunks](#unknown-chunks).
-
-For a _still image_, the _image data_ consists of a single frame, which is made
-up of:
-
-  * An optional [alpha subchunk](#alpha).
-
-  * A [bitstream subchunk](#bitstream-vp8vp8l).
-
-For an _animated image_, the _image data_ consists of multiple frames. More
-details about frames can be found in the [Animation](#animation) section.
-
-All chunks SHOULD be placed in the same order as listed above. If a chunk
-appears in the wrong place, the file is invalid, but readers MAY parse the
-file, ignoring the chunks that are out of order.
-
-**Rationale:** Setting the order of chunks should allow quicker file
-parsing. For example, if an 'ALPH' Chunk does not appear in its required
-position, a decoder can choose to stop searching for it. The rule of
-ignoring late chunks should make programs that need to do a full search
-give the same results as the ones stopping early.
-
-Extended WebP file header:
-{:#extended_header}
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                                                               |
-    |                   WebP file header (12 bytes)                 |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('VP8X')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |Rsv|I|L|E|X|A|R|                   Reserved                    |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |          Canvas Width Minus One               |             ...
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    ...  Canvas Height Minus One    |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Reserved (Rsv): 2 bits
-
-: MUST be `0`. Readers MUST ignore this field.
-
-ICC profile (I): 1 bit
-
-: Set if the file contains an 'ICCP' Chunk.
-
-Alpha (L): 1 bit
-
-: Set if any of the frames of the image contain transparency information
-  ("alpha").
-
-Exif metadata (E): 1 bit
-
-: Set if the file contains Exif metadata.
-
-XMP metadata (X): 1 bit
-
-: Set if the file contains XMP metadata.
-
-Animation (A): 1 bit
-
-: Set if this is an animated image. Data in 'ANIM' and 'ANMF' Chunks should be
-  used to control the animation.
-
-Reserved (R): 1 bit
-
-: MUST be `0`. Readers MUST ignore this field.
-
-Reserved: 24 bits
-
-: MUST be `0`. Readers MUST ignore this field.
-
-Canvas Width Minus One: 24 bits
-
-: _1-based_ width of the canvas in pixels.
-  The actual canvas width is `1 + Canvas Width Minus One`.
-
-Canvas Height Minus One: 24 bits
-
-: _1-based_ height of the canvas in pixels.
-  The actual canvas height is `1 + Canvas Height Minus One`.
-
-The product of _Canvas Width_ and _Canvas Height_ MUST be at most `2^32 - 1`.
-
-Future specifications may add more fields. Unknown fields MUST be ignored.
-
-### Chunks
-
-#### Animation
-
-An animation is controlled by 'ANIM' and 'ANMF' Chunks.
-
-'ANIM' Chunk:
-{:#anim_chunk}
-
-For an animated image, this chunk contains the _global parameters_ of the
-animation.
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('ANIM')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                       Background Color                        |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |          Loop Count           |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Background Color: 32 bits (_uint32_)
-
-: The default background color of the canvas in \[Blue, Green, Red, Alpha\]
-  byte order. This color MAY be used to fill the unused space on the canvas
-  around the frames, as well as the transparent pixels of the first frame.
-  The background color is also used when the Disposal method is `1`.
-
-**Note**:
-
-  * The background color MAY contain a non-opaque alpha value, even if the
-    _Alpha_ flag in the ['VP8X' Chunk](#extended_header) is unset.
-
-  * Viewer applications SHOULD treat the background color value as a hint and
-    are not required to use it.
-
-  * The canvas is cleared at the start of each loop. The background color MAY be
-    used to achieve this.
-
-Loop Count: 16 bits (_uint16_)
-
-: The number of times to loop the animation. If it is `0`, this means
-  infinitely.
-
-This chunk MUST appear if the _Animation_ flag in the 'VP8X' Chunk is set.
-If the _Animation_ flag is not set and this chunk is present, it MUST be
-ignored.
-
-'ANMF' Chunk:
-
-For animated images, this chunk contains information about a _single_ frame.
-If the _Animation flag_ is not set, then this chunk SHOULD NOT be present.
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('ANMF')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                        Frame X                |             ...
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    ...          Frame Y            |   Frame Width Minus One     ...
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    ...             |           Frame Height Minus One              |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                 Frame Duration                |  Reserved |B|D|
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                         Frame Data                            :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Frame X: 24 bits (_uint24_)
-
-: The X coordinate of the upper left corner of the frame is `Frame X * 2`.
-
-Frame Y: 24 bits (_uint24_)
-
-: The Y coordinate of the upper left corner of the frame is `Frame Y * 2`.
-
-Frame Width Minus One: 24 bits (_uint24_)
-
-: The _1-based_ width of the frame.
-  The frame width is `1 + Frame Width Minus One`.
-
-Frame Height Minus One: 24 bits (_uint24_)
-
-: The _1-based_ height of the frame.
-  The frame height is `1 + Frame Height Minus One`.
-
-Frame Duration: 24 bits (_uint24_)
-
-: The time to wait before displaying the next frame, in 1-millisecond units.
-  Note that the interpretation of the Frame Duration of 0 (and often <= 10) is
-  defined by the implementation. Many tools and browsers assign a minimum
-  duration similar to GIF.
-
-Reserved: 6 bits
-
-: MUST be `0`. Readers MUST ignore this field.
-
-Blending method (B): 1 bit
-
-: Indicates how transparent pixels of _the current frame_ are to be blended
-  with corresponding pixels of the previous canvas:
-
-    * `0`: Use alpha-blending. After disposing of the previous frame, render the
-      current frame on the canvas using [alpha-blending](#alpha-blending). If
-      the current frame does not have an alpha channel, assume the alpha value
-      is 255, effectively replacing the rectangle.
-
-    * `1`: Do not blend. After disposing of the previous frame, render the
-      current frame on the canvas by overwriting the rectangle covered by the
-      current frame.
-
-Disposal method (D): 1 bit
-
-: Indicates how _the current frame_ is to be treated after it has been
-  displayed (before rendering the next frame) on the canvas:
-
-    * `0`: Do not dispose. Leave the canvas as is.
-
-    * `1`: Dispose to the background color. Fill the _rectangle_ on the canvas
-      covered by the _current frame_ with the background color specified in the
-      ['ANIM' Chunk](#anim_chunk).
-
-**Notes**:
-
-  * The frame disposal only applies to the _frame rectangle_, that is, the
-    rectangle defined by _Frame X_, _Frame Y_, _frame width_, and _frame
-    height_. It may or may not cover the whole canvas.
-
-{:#alpha-blending}
-  * Alpha-blending:
-
-    Given that each of the R, G, B, and A channels is 8 bits, and the RGB
-    channels are _not premultiplied_ by alpha, the formula for blending
-    'dst' onto 'src' is:
-
-~~~~~
-    blend.A = src.A + dst.A * (1 - src.A / 255)
-    if blend.A = 0 then
-      blend.RGB = 0
-    else
-      blend.RGB =
-          (src.RGB * src.A +
-           dst.RGB * dst.A * (1 - src.A / 255)) / blend.A
-~~~~~
-
-  * Alpha-blending SHOULD be done in linear color space, by taking into account
-    the [color profile](#color-profile) of the image. If the color profile is
-    not present, standard RGB (sRGB) is to be assumed. (Note that sRGB also
-    needs to be linearized due to a gamma of ~2.2.)
-
-Frame Data: _Chunk Size_ - `16` bytes
-
-: Consists of:
-
-  * An optional [alpha subchunk](#alpha) for the frame.
-
-  * A [bitstream subchunk](#bitstream-vp8vp8l) for the frame.
-
-  * An optional list of [unknown chunks](#unknown-chunks).
-
-**Note**: The 'ANMF' payload, _Frame Data_ above, consists of individual
-_padded_ chunks, as described by the [RIFF file format](#riff-file-format).
-
-#### Alpha
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('ALPH')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |Rsv| P | F | C |     Alpha Bitstream...                        |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Reserved (Rsv): 2 bits
-
-: MUST be `0`. Readers MUST ignore this field.
-
-Preprocessing (P): 2 bits
-
-: These _informative_ bits are used to signal the preprocessing that has
-  been performed during compression. The decoder can use this information to
-  for example, dither the values or smooth the gradients prior to display.
-
-    * `0`: No preprocessing.
-    * `1`: Level reduction.
-
-Decoders are not required to use this information in any specified way.
-
-Filtering method (F): 2 bits
-
-: The filtering methods used are described as follows:
-
-    * `0`: None.
-    * `1`: Horizontal filter.
-    * `2`: Vertical filter.
-    * `3`: Gradient filter.
-
-For each pixel, filtering is performed using the following calculations.
-Assume the alpha values surrounding the current `X` position are labeled as:
-
-     C | B |
-    ---+---+
-     A | X |
-
-We seek to compute the alpha value at position `X`. First, a prediction is
-made depending on the filtering method:
-
-  * Method `0`: predictor = 0
-  * Method `1`: predictor = A
-  * Method `2`: predictor = B
-  * Method `3`: predictor = clip(A + B - C)
-
-where `clip(v)` is equal to:
-
-  * 0    if v < 0,
-  * 255  if v > 255, or
-  * v    otherwise
-
-The final value is derived by adding the decompressed value `X` to the
-predictor and using modulo-256 arithmetic to wrap the \[256..511\] range
-into the \[0..255\] one:
-
-`alpha = (predictor + X) % 256`
-
-There are special cases for the left-most and top-most pixel positions. For
-example, the top-left value at location (0, 0) uses 0 as the predictor value.
-Otherwise:
-
-  * For horizontal or gradient filtering methods, the left-most pixels at
-    location (0, y) are predicted using the location (0, y-1) just above.
-  * For vertical or gradient filtering methods, the top-most pixels at
-    location (x, 0) are predicted using the location (x-1, 0) on the left.
-
-Compression method (C): 2 bits
-
-: The compression method used:
-
-    * `0`: No compression.
-    * `1`: Compressed using the WebP lossless format.
-
-Alpha bitstream: _Chunk Size_ - `1` bytes
-
-: Encoded alpha bitstream.
-
-This optional chunk contains encoded alpha data for this frame. A frame
-containing a 'VP8L' Chunk SHOULD NOT contain this chunk.
-
-**Rationale**: The transparency information is already part of the 'VP8L'
-Chunk.
-
-The alpha channel data is stored as uncompressed raw data (when the
-compression method is '0') or compressed using the lossless format
-(when the compression method is '1').
-
-  * Raw data: This consists of a byte sequence of length = width * height,
-    containing all the 8-bit transparency values in scan order.
-
-  * Lossless format compression: The byte sequence is a compressed
-    image-stream (as described in ["WebP Lossless Bitstream Format"]
-    [webpllspec]) of implicit dimensions width x height. That is, this
-    image-stream does NOT contain any headers describing the image dimensions.
-
-    **Rationale**: The dimensions are already known from other sources,
-    so storing them again would be redundant and prone to error.
-
-    Once the image-stream is decoded into Alpha, Red, Green, Blue (ARGB) color
-    values, following the process described in the lossless format
-    specification, the transparency information must be extracted from the
-    *green* channel of the ARGB quadruplet.
-
-    **Rationale**: The green channel is allowed extra transformation
-    steps in the specification -- unlike the other channels -- that can
-    improve compression.
-
-#### Bitstream (VP8/VP8L)
-
-This chunk contains compressed bitstream data for a single frame.
-
-A bitstream chunk may be either (i) a 'VP8 ' Chunk, using 'VP8 ' (note the
-significant fourth-character space) as its FourCC, _or_ (ii) a 'VP8L' Chunk,
-using 'VP8L' as its FourCC.
-
-The formats of 'VP8 ' and 'VP8L' Chunks are as described in sections
-[Simple File Format (Lossy)](#simple-file-format-lossy)
-and [Simple File Format (Lossless)](#simple-file-format-lossless), respectively.
-
-#### Color Profile
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('ICCP')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                       Color Profile                           :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Color Profile: _Chunk Size_ bytes
-
-: ICC profile.
-
-This chunk MUST appear before the image data.
-
-There SHOULD be at most one such chunk. If there are more such chunks, readers
-MAY ignore all except the first one.
-See the [ICC Specification][iccspec] for details.
-
-If this chunk is not present, sRGB SHOULD be assumed.
-
-#### Metadata
-
-Metadata can be stored in 'EXIF' or 'XMP ' Chunks.
-
-There SHOULD be at most one chunk of each type ('EXIF' and 'XMP '). If there
-are more such chunks, readers MAY ignore all except the first one.
-
-The chunks are defined as follows:
-
-'EXIF' Chunk:
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('EXIF')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                        Exif Metadata                          :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Exif Metadata: _Chunk Size_ bytes
-
-: Image metadata in Exif format.
-
-'XMP ' Chunk:
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('XMP ')                      |
-    |                                                               |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    :                        XMP Metadata                           :
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-XMP Metadata: _Chunk Size_ bytes
-
-: Image metadata in XMP format.
-
-Note that the fourth character in the 'XMP ' FourCC is an ASCII space (0x20).
-
-Additional guidance about handling metadata can be found in the
-Metadata Working Group's ["Guidelines for Handling Metadata"][metadata].
-
-#### Unknown Chunks
-
-A RIFF chunk (described in the [RIFF File Format](#riff-file-format) section)
-whose FourCC is different from any of the chunks described in this document, is
-considered an _unknown chunk_.
-
-**Rationale**: Allowing unknown chunks gives a provision for future extension
-of the format and also allows storage of any application-specific data.
-
-A file MAY contain unknown chunks:
-
-  * at the end of the file, as described in [Extended WebP file
-    header](#extended_header) section, or
-  * at the end of 'ANMF' Chunks, as described in the
-    [Animation](#animation) section.
-
-Readers SHOULD ignore these chunks. Writers SHOULD preserve them in their
-original order (unless they specifically intend to modify these chunks).
-
-### Canvas Assembly from Frames
-
-Here we provide an overview of how a reader MUST assemble a canvas in the case
-of an animated image.
-
-The process begins with creating a canvas using the dimensions given in the
-'VP8X' Chunk, `Canvas Width Minus One + 1` pixels wide by `Canvas Height Minus
-One + 1` pixels high. The `Loop Count` field from the 'ANIM' Chunk controls how
-many times the animation process is repeated. This is `Loop Count - 1` for
-nonzero `Loop Count` values or infinite if the `Loop Count` is zero.
-
-At the beginning of each loop iteration, the canvas is filled using the
-background color from the 'ANIM' Chunk or an application-defined color.
-
-'ANMF' Chunks contain individual frames given in display order. Before rendering
-each frame, the previous frame's `Disposal method` is applied.
-
-The rendering of the decoded frame begins at the Cartesian coordinates (`2 *
-Frame X`, `2 * Frame Y`), using the top-left corner of the canvas as the origin.
-`Frame Width Minus One + 1` pixels wide by `Frame Height Minus One + 1` pixels
-high are rendered onto the canvas using the `Blending method`.
-
-The canvas is displayed for `Frame Duration` milliseconds. This continues until
-all frames given by 'ANMF' Chunks have been displayed. A new loop iteration is
-then begun, or the canvas is left in its final state if all iterations have been
-completed.
-
-The following pseudocode illustrates the rendering process. The notation
-_VP8X.field_ means the field in the 'VP8X' Chunk with the same description.
-
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-assert VP8X.flags.hasAnimation
-canvas ← new image of size VP8X.canvasWidth x VP8X.canvasHeight with
-         background color ANIM.background_color.
-loop_count ← ANIM.loopCount
-dispose_method ← Dispose to background color
-if loop_count == 0:
-  loop_count = ∞
-frame_params ← nil
-assert next chunk in image_data is ANMF
-for loop = 0..loop_count - 1
-  clear canvas to ANIM.background_color or application-defined color
-  until eof or non-ANMF chunk
-    frame_params.frameX = Frame X
-    frame_params.frameY = Frame Y
-    frame_params.frameWidth = Frame Width Minus One + 1
-    frame_params.frameHeight = Frame Height Minus One + 1
-    frame_params.frameDuration = Frame Duration
-    frame_right = frame_params.frameX + frame_params.frameWidth
-    frame_bottom = frame_params.frameY + frame_params.frameHeight
-    assert VP8X.canvasWidth >= frame_right
-    assert VP8X.canvasHeight >= frame_bottom
-    for subchunk in 'Frame Data':
-      if subchunk.tag == "ALPH":
-        assert alpha subchunks not found in 'Frame Data' earlier
-        frame_params.alpha = alpha_data
-      else if subchunk.tag == "VP8 " OR subchunk.tag == "VP8L":
-        assert bitstream subchunks not found in 'Frame Data' earlier
-        frame_params.bitstream = bitstream_data
-    render frame with frame_params.alpha and frame_params.bitstream
-      on canvas with top-left corner at (frame_params.frameX,
-      frame_params.frameY), using Blending method
-      frame_params.blendingMethod.
-    canvas contains the decoded image.
-    Show the contents of the canvas for
-    frame_params.frameDuration * 1 ms.
-    dispose_method = frame_params.disposeMethod
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-
-Example File Layouts
---------------------
-
-A lossy-encoded image with alpha may look as follows:
-
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-RIFF/WEBP
-+- VP8X (descriptions of features used)
-+- ALPH (alpha bitstream)
-+- VP8 (bitstream)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-A lossless-encoded image may look as follows:
-
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-RIFF/WEBP
-+- VP8X (descriptions of features used)
-+- XYZW (unknown chunk)
-+- VP8L (lossless bitstream)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-A lossless image with an ICC profile and XMP metadata may
-look as follows:
-
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-RIFF/WEBP
-+- VP8X (descriptions of features used)
-+- ICCP (color profile)
-+- VP8L (lossless bitstream)
-+- XMP  (metadata)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-An animated image with Exif metadata may look as follows:
-
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-RIFF/WEBP
-+- VP8X (descriptions of features used)
-+- ANIM (global animation parameters)
-+- ANMF (frame1 parameters + data)
-+- ANMF (frame2 parameters + data)
-+- ANMF (frame3 parameters + data)
-+- ANMF (frame4 parameters + data)
-+- EXIF (metadata)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-[webpllspec]: https://chromium.googlesource.com/webm/libwebp/+/HEAD/doc/webp-lossless-bitstream-spec.txt
-[iccspec]: https://www.color.org/icc_specs2.xalter
-[metadata]: https://web.archive.org/web/20180919181934/http://www.metadataworkinggroup.org/pdf/mwg_guidance.pdf
-[rec601]: https://www.itu.int/rec/R-REC-BT.601
-[rfc 1166]: https://datatracker.ietf.org/doc/html/rfc1166
-[rfc 2119]: https://datatracker.ietf.org/doc/html/rfc2119
-[rfc 6386]: https://datatracker.ietf.org/doc/html/rfc6386
-[rfc 8174]: https://datatracker.ietf.org/doc/html/rfc8174

external/libwebp/libwebp/examples/Android.mk

@@ -1,96 +0,0 @@
-# Ignore this file during non-NDK builds.
-ifdef NDK_ROOT
-LOCAL_PATH := $(call my-dir)
-
-################################################################################
-# libexample_util
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    example_util.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
-
-LOCAL_MODULE := example_util
-
-include $(BUILD_STATIC_LIBRARY)
-
-################################################################################
-# cwebp
-
-include $(CLEAR_VARS)
-
-# Note: to enable jpeg/png encoding the sources from AOSP can be used with
-# minor modification to their Android.mk files.
-LOCAL_SRC_FILES := \
-    cwebp.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_STATIC_LIBRARIES := example_util imageio_util imagedec webpdemux webp
-
-LOCAL_MODULE := cwebp
-
-include $(BUILD_EXECUTABLE)
-
-################################################################################
-# dwebp
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    dwebp.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_STATIC_LIBRARIES := example_util imagedec imageenc webpdemux webp
-LOCAL_MODULE := dwebp
-
-include $(BUILD_EXECUTABLE)
-
-################################################################################
-# webpmux
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    webpmux.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_STATIC_LIBRARIES := example_util imageio_util webpmux webp
-
-LOCAL_MODULE := webpmux_example
-
-include $(BUILD_EXECUTABLE)
-
-################################################################################
-# img2webp
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    img2webp.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_STATIC_LIBRARIES := example_util imageio_util imagedec webpmux webpdemux \
-                          webp
-
-LOCAL_MODULE := img2webp_example
-
-include $(BUILD_EXECUTABLE)
-
-################################################################################
-# webpinfo
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    webpinfo.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_STATIC_LIBRARIES := example_util imageio_util webp
-
-LOCAL_MODULE := webpinfo_example
-
-include $(BUILD_EXECUTABLE)
-endif  # NDK_ROOT

external/libwebp/libwebp/examples/Makefile.am

@@ -1,119 +0,0 @@
-AM_CPPFLAGS += -I$(top_builddir)/src -I$(top_srcdir)/src
-
-bin_PROGRAMS =
-if BUILD_DEMUX
-  bin_PROGRAMS += dwebp cwebp
-endif
-if BUILD_ANIMDIFF
-  noinst_PROGRAMS = anim_diff anim_dump
-endif
-if BUILD_GIF2WEBP
-  bin_PROGRAMS += gif2webp
-endif
-if BUILD_IMG2WEBP
-  bin_PROGRAMS += img2webp
-endif
-if BUILD_MUX
-  bin_PROGRAMS += webpmux
-endif
-if BUILD_VWEBP
-  bin_PROGRAMS += vwebp
-endif
-if BUILD_WEBPINFO
-  bin_PROGRAMS += webpinfo
-endif
-
-noinst_LTLIBRARIES = libexample_util.la
-
-libexample_util_la_SOURCES = example_util.c example_util.h
-libexample_util_la_LIBADD = ../src/libwebp.la
-
-anim_diff_SOURCES = anim_diff.c anim_util.c anim_util.h gifdec.c gifdec.h
-anim_diff_CPPFLAGS = $(AM_CPPFLAGS) $(GIF_INCLUDES)
-anim_diff_LDADD  =
-anim_diff_LDADD += ../src/demux/libwebpdemux.la
-anim_diff_LDADD += libexample_util.la
-anim_diff_LDADD += ../imageio/libimageio_util.la
-anim_diff_LDADD += $(GIF_LIBS) -lm
-
-anim_dump_SOURCES = anim_dump.c anim_util.c anim_util.h gifdec.c gifdec.h
-anim_dump_CPPFLAGS = $(AM_CPPFLAGS) $(PNG_INCLUDES)
-anim_dump_CPPFLAGS += $(GIF_INCLUDES)
-anim_dump_LDADD  =
-anim_dump_LDADD += ../src/demux/libwebpdemux.la
-anim_dump_LDADD += libexample_util.la
-anim_dump_LDADD += ../imageio/libimageio_util.la
-anim_dump_LDADD += ../imageio/libimageenc.la
-anim_dump_LDADD += $(PNG_LIBS) $(GIF_LIBS) $(TIFF_LIBS) -lm
-
-cwebp_SOURCES  = cwebp.c stopwatch.h
-cwebp_CPPFLAGS  = $(AM_CPPFLAGS) -I$(top_srcdir)
-cwebp_LDADD  =
-cwebp_LDADD += libexample_util.la
-cwebp_LDADD += ../imageio/libimageio_util.la
-cwebp_LDADD += ../imageio/libimagedec.la
-cwebp_LDADD += ../src/libwebp.la
-cwebp_LDADD += $(JPEG_LIBS) $(PNG_LIBS) $(TIFF_LIBS)
-
-dwebp_SOURCES = dwebp.c stopwatch.h
-dwebp_CPPFLAGS  = $(AM_CPPFLAGS)
-dwebp_CPPFLAGS += $(JPEG_INCLUDES) $(PNG_INCLUDES)
-dwebp_LDADD  =
-dwebp_LDADD += libexample_util.la
-dwebp_LDADD += ../imageio/libimagedec.la
-dwebp_LDADD += ../imageio/libimageenc.la
-dwebp_LDADD += ../imageio/libimageio_util.la
-dwebp_LDADD += ../src/libwebp.la
-dwebp_LDADD +=$(PNG_LIBS) $(JPEG_LIBS)
-
-gif2webp_SOURCES = gif2webp.c gifdec.c gifdec.h
-gif2webp_CPPFLAGS = $(AM_CPPFLAGS) $(GIF_INCLUDES)
-gif2webp_LDADD  =
-gif2webp_LDADD += libexample_util.la
-gif2webp_LDADD += ../imageio/libimageio_util.la
-gif2webp_LDADD += ../src/mux/libwebpmux.la
-gif2webp_LDADD += ../src/libwebp.la
-gif2webp_LDADD += $(GIF_LIBS)
-
-vwebp_SOURCES = vwebp.c
-vwebp_CPPFLAGS = $(AM_CPPFLAGS) $(GL_INCLUDES)
-vwebp_LDADD  =
-vwebp_LDADD += libexample_util.la
-vwebp_LDADD += ../imageio/libimageio_util.la
-vwebp_LDADD += ../src/demux/libwebpdemux.la
-vwebp_LDADD += $(GL_LIBS)
-
-webpmux_SOURCES = webpmux.c
-webpmux_CPPFLAGS = $(AM_CPPFLAGS)
-webpmux_LDADD  =
-webpmux_LDADD += libexample_util.la
-webpmux_LDADD += ../imageio/libimageio_util.la
-webpmux_LDADD += ../src/mux/libwebpmux.la
-webpmux_LDADD += ../src/libwebp.la
-
-img2webp_SOURCES = img2webp.c
-img2webp_CPPFLAGS = $(AM_CPPFLAGS) -I$(top_srcdir)
-img2webp_LDADD  =
-img2webp_LDADD += libexample_util.la
-img2webp_LDADD += ../imageio/libimageio_util.la
-img2webp_LDADD += ../imageio/libimagedec.la
-img2webp_LDADD += ../src/mux/libwebpmux.la
-img2webp_LDADD += ../src/libwebp.la
-img2webp_LDADD += $(PNG_LIBS) $(JPEG_LIBS) $(TIFF_LIBS)
-
-webpinfo_SOURCES = webpinfo.c
-webpinfo_CPPFLAGS = $(AM_CPPFLAGS)
-webpinfo_LDADD  =
-webpinfo_LDADD += libexample_util.la
-webpinfo_LDADD += ../imageio/libimageio_util.la
-webpinfo_LDADD += ../src/libwebp.la
-
-if BUILD_LIBWEBPDECODER
-  anim_diff_LDADD += ../src/libwebpdecoder.la
-  anim_dump_LDADD += ../src/libwebpdecoder.la
-  vwebp_LDADD += ../src/libwebpdecoder.la
-else
-  anim_diff_LDADD += ../src/libwebp.la
-  anim_dump_LDADD += ../src/libwebp.la
-  vwebp_LDADD += ../src/libwebp.la
-endif

external/libwebp/libwebp/examples/anim_diff.c

@@ -1,317 +0,0 @@
-// Copyright 2015 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Checks if given pair of animated GIF/WebP images are identical:
-// That is: their reconstructed canvases match pixel-by-pixel and their other
-// animation properties (loop count etc) also match.
-//
-// example: anim_diff foo.gif bar.webp
-
-#include <assert.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>  // for 'strtod'.
-#include <string.h>  // for 'strcmp'.
-
-#include "./anim_util.h"
-#include "./example_util.h"
-#include "./unicode.h"
-
-#if defined(_MSC_VER) && _MSC_VER < 1900
-#define snprintf _snprintf
-#endif
-
-// Returns true if 'a + b' will overflow.
-static int AdditionWillOverflow(int a, int b) {
-  return (b > 0) && (a > INT_MAX - b);
-}
-
-static int FramesAreEqual(const uint8_t* const rgba1,
-                          const uint8_t* const rgba2, int width, int height) {
-  const int stride = width * 4;  // Always true for 'DecodedFrame.rgba'.
-  return !memcmp(rgba1, rgba2, stride * height);
-}
-
-static WEBP_INLINE int PixelsAreSimilar(uint32_t src, uint32_t dst,
-                                        int max_allowed_diff) {
-  const int src_a = (src >> 24) & 0xff;
-  const int src_r = (src >> 16) & 0xff;
-  const int src_g = (src >> 8) & 0xff;
-  const int src_b = (src >> 0) & 0xff;
-  const int dst_a = (dst >> 24) & 0xff;
-  const int dst_r = (dst >> 16) & 0xff;
-  const int dst_g = (dst >> 8) & 0xff;
-  const int dst_b = (dst >> 0) & 0xff;
-
-  return (abs(src_r * src_a - dst_r * dst_a) <= (max_allowed_diff * 255)) &&
-         (abs(src_g * src_a - dst_g * dst_a) <= (max_allowed_diff * 255)) &&
-         (abs(src_b * src_a - dst_b * dst_a) <= (max_allowed_diff * 255)) &&
-         (abs(src_a - dst_a) <= max_allowed_diff);
-}
-
-static int FramesAreSimilar(const uint8_t* const rgba1,
-                            const uint8_t* const rgba2,
-                            int width, int height, int max_allowed_diff) {
-  int i, j;
-  assert(max_allowed_diff > 0);
-  for (j = 0; j < height; ++j) {
-    for (i = 0; i < width; ++i) {
-      const int stride = width * 4;
-      const size_t offset = j * stride + i;
-      if (!PixelsAreSimilar(rgba1[offset], rgba2[offset], max_allowed_diff)) {
-        return 0;
-      }
-    }
-  }
-  return 1;
-}
-
-// Minimize number of frames by combining successive frames that have at max
-// 'max_diff' difference per channel between corresponding pixels.
-static void MinimizeAnimationFrames(AnimatedImage* const img, int max_diff) {
-  uint32_t i;
-  for (i = 1; i < img->num_frames; ++i) {
-    DecodedFrame* const frame1 = &img->frames[i - 1];
-    DecodedFrame* const frame2 = &img->frames[i];
-    const uint8_t* const rgba1 = frame1->rgba;
-    const uint8_t* const rgba2 = frame2->rgba;
-    int should_merge_frames = 0;
-    // If merging frames will result in integer overflow for 'duration',
-    // skip merging.
-    if (AdditionWillOverflow(frame1->duration, frame2->duration)) continue;
-    if (max_diff > 0) {
-      should_merge_frames = FramesAreSimilar(rgba1, rgba2, img->canvas_width,
-                                             img->canvas_height, max_diff);
-    } else {
-      should_merge_frames =
-          FramesAreEqual(rgba1, rgba2, img->canvas_width, img->canvas_height);
-    }
-    if (should_merge_frames) {  // Merge 'i+1'th frame into 'i'th frame.
-      frame1->duration += frame2->duration;
-      if (i + 1 < img->num_frames) {
-        memmove(&img->frames[i], &img->frames[i + 1],
-                (img->num_frames - i - 1) * sizeof(*img->frames));
-      }
-      --img->num_frames;
-      --i;
-    }
-  }
-}
-
-static int CompareValues(uint32_t a, uint32_t b, const char* output_str) {
-  if (a != b) {
-    fprintf(stderr, "%s: %d vs %d\n", output_str, a, b);
-    return 0;
-  }
-  return 1;
-}
-
-static int CompareBackgroundColor(uint32_t bg1, uint32_t bg2, int premultiply) {
-  if (premultiply) {
-    const int alpha1 = (bg1 >> 24) & 0xff;
-    const int alpha2 = (bg2 >> 24) & 0xff;
-    if (alpha1 == 0 && alpha2 == 0) return 1;
-  }
-  if (bg1 != bg2) {
-    fprintf(stderr, "Background color mismatch: 0x%08x vs 0x%08x\n",
-            bg1, bg2);
-    return 0;
-  }
-  return 1;
-}
-
-// Note: As long as frame durations and reconstructed frames are identical, it
-// is OK for other aspects like offsets, dispose/blend method to vary.
-static int CompareAnimatedImagePair(const AnimatedImage* const img1,
-                                    const AnimatedImage* const img2,
-                                    int premultiply,
-                                    double min_psnr) {
-  int ok = 1;
-  const int is_multi_frame_image = (img1->num_frames > 1);
-  uint32_t i;
-
-  ok = CompareValues(img1->canvas_width, img2->canvas_width,
-                     "Canvas width mismatch") && ok;
-  ok = CompareValues(img1->canvas_height, img2->canvas_height,
-                     "Canvas height mismatch") && ok;
-  ok = CompareValues(img1->num_frames, img2->num_frames,
-                     "Frame count mismatch") && ok;
-  if (!ok) return 0;  // These are fatal failures, can't proceed.
-
-  if (is_multi_frame_image) {  // Checks relevant for multi-frame images only.
-    int max_loop_count_workaround = 0;
-    // Transcodes to webp increase the gif loop count by 1 for compatibility.
-    // When the gif has the maximum value the webp value will be off by one.
-    if ((img1->format == ANIM_GIF && img1->loop_count == 65536 &&
-         img2->format == ANIM_WEBP && img2->loop_count == 65535) ||
-        (img1->format == ANIM_WEBP && img1->loop_count == 65535 &&
-         img2->format == ANIM_GIF && img2->loop_count == 65536)) {
-      max_loop_count_workaround = 1;
-    }
-    ok = (max_loop_count_workaround ||
-          CompareValues(img1->loop_count, img2->loop_count,
-                        "Loop count mismatch")) && ok;
-    ok = CompareBackgroundColor(img1->bgcolor, img2->bgcolor,
-                                premultiply) && ok;
-  }
-
-  for (i = 0; i < img1->num_frames; ++i) {
-    // Pixel-by-pixel comparison.
-    const uint8_t* const rgba1 = img1->frames[i].rgba;
-    const uint8_t* const rgba2 = img2->frames[i].rgba;
-    int max_diff;
-    double psnr;
-    if (is_multi_frame_image) {  // Check relevant for multi-frame images only.
-      const char format[] = "Frame #%d, duration mismatch";
-      char tmp[sizeof(format) + 8];
-      ok = ok && (snprintf(tmp, sizeof(tmp), format, i) >= 0);
-      ok = ok && CompareValues(img1->frames[i].duration,
-                               img2->frames[i].duration, tmp);
-    }
-    GetDiffAndPSNR(rgba1, rgba2, img1->canvas_width, img1->canvas_height,
-                   premultiply, &max_diff, &psnr);
-    if (min_psnr > 0.) {
-      if (psnr < min_psnr) {
-        fprintf(stderr, "Frame #%d, psnr = %.2lf (min_psnr = %f)\n", i,
-                psnr, min_psnr);
-        ok = 0;
-      }
-    } else {
-      if (max_diff != 0) {
-        fprintf(stderr, "Frame #%d, max pixel diff: %d\n", i, max_diff);
-        ok = 0;
-      }
-    }
-  }
-  return ok;
-}
-
-static void Help(void) {
-  printf("Usage: anim_diff <image1> <image2> [options]\n");
-  printf("\nOptions:\n");
-  printf("  -dump_frames <folder> dump decoded frames in PAM format\n");
-  printf("  -min_psnr <float> ... minimum per-frame PSNR\n");
-  printf("  -raw_comparison ..... if this flag is not used, RGB is\n");
-  printf("                        premultiplied before comparison\n");
-  printf("  -max_diff <int> ..... maximum allowed difference per channel\n"
-         "                        between corresponding pixels in subsequent\n"
-         "                        frames\n");
-  printf("  -h .................. this help\n");
-  printf("  -version ............ print version number and exit\n");
-}
-
-int main(int argc, const char* argv[]) {
-  int return_code = -1;
-  int dump_frames = 0;
-  const char* dump_folder = NULL;
-  double min_psnr = 0.;
-  int got_input1 = 0;
-  int got_input2 = 0;
-  int premultiply = 1;
-  int max_diff = 0;
-  int i, c;
-  const char* files[2] = { NULL, NULL };
-  AnimatedImage images[2];
-
-  INIT_WARGV(argc, argv);
-
-  for (c = 1; c < argc; ++c) {
-    int parse_error = 0;
-    if (!strcmp(argv[c], "-dump_frames")) {
-      if (c < argc - 1) {
-        dump_frames = 1;
-        dump_folder = (const char*)GET_WARGV(argv, ++c);
-      } else {
-        parse_error = 1;
-      }
-    } else if (!strcmp(argv[c], "-min_psnr")) {
-      if (c < argc - 1) {
-        min_psnr = ExUtilGetFloat(argv[++c], &parse_error);
-      } else {
-        parse_error = 1;
-      }
-    } else if (!strcmp(argv[c], "-raw_comparison")) {
-      premultiply = 0;
-    } else if (!strcmp(argv[c], "-max_diff")) {
-      if (c < argc - 1) {
-        max_diff = ExUtilGetInt(argv[++c], 0, &parse_error);
-      } else {
-        parse_error = 1;
-      }
-    } else if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
-      Help();
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-version")) {
-      int dec_version, demux_version;
-      GetAnimatedImageVersions(&dec_version, &demux_version);
-      printf("WebP Decoder version: %d.%d.%d\nWebP Demux version: %d.%d.%d\n",
-             (dec_version >> 16) & 0xff, (dec_version >> 8) & 0xff,
-             (dec_version >> 0) & 0xff,
-             (demux_version >> 16) & 0xff, (demux_version >> 8) & 0xff,
-             (demux_version >> 0) & 0xff);
-      FREE_WARGV_AND_RETURN(0);
-    } else {
-      if (!got_input1) {
-        files[0] = (const char*)GET_WARGV(argv, c);
-        got_input1 = 1;
-      } else if (!got_input2) {
-        files[1] = (const char*)GET_WARGV(argv, c);
-        got_input2 = 1;
-      } else {
-        parse_error = 1;
-      }
-    }
-    if (parse_error) {
-      Help();
-      FREE_WARGV_AND_RETURN(-1);
-    }
-  }
-  if (argc < 3) {
-    Help();
-    FREE_WARGV_AND_RETURN(-1);
-  }
-
-
-  if (!got_input2) {
-    Help();
-    FREE_WARGV_AND_RETURN(-1);
-  }
-
-  if (dump_frames) {
-    WPRINTF("Dumping decoded frames in: %s\n", (const W_CHAR*)dump_folder);
-  }
-
-  memset(images, 0, sizeof(images));
-  for (i = 0; i < 2; ++i) {
-    WPRINTF("Decoding file: %s\n", (const W_CHAR*)files[i]);
-    if (!ReadAnimatedImage(files[i], &images[i], dump_frames, dump_folder)) {
-      WFPRINTF(stderr, "Error decoding file: %s\n Aborting.\n",
-               (const W_CHAR*)files[i]);
-      return_code = -2;
-      goto End;
-    } else {
-      MinimizeAnimationFrames(&images[i], max_diff);
-    }
-  }
-
-  if (!CompareAnimatedImagePair(&images[0], &images[1],
-                                premultiply, min_psnr)) {
-    WFPRINTF(stderr, "\nFiles %s and %s differ.\n", (const W_CHAR*)files[0],
-             (const W_CHAR*)files[1]);
-    return_code = -3;
-  } else {
-    WPRINTF("\nFiles %s and %s are identical.\n", (const W_CHAR*)files[0],
-            (const W_CHAR*)files[1]);
-    return_code = 0;
-  }
- End:
-  ClearAnimatedImage(&images[0]);
-  ClearAnimatedImage(&images[1]);
-  FREE_WARGV_AND_RETURN(return_code);
-}

external/libwebp/libwebp/examples/anim_dump.c

@@ -1,121 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Decodes an animated WebP file and dumps the decoded frames as PNG or TIFF.
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include <stdio.h>
-#include <string.h>  // for 'strcmp'.
-
-#include "./anim_util.h"
-#include "webp/decode.h"
-#include "../imageio/image_enc.h"
-#include "./unicode.h"
-
-#if defined(_MSC_VER) && _MSC_VER < 1900
-#define snprintf _snprintf
-#endif
-
-static void Help(void) {
-  printf("Usage: anim_dump [options] files...\n");
-  printf("\nOptions:\n");
-  printf("  -folder <string> .... dump folder (default: '.')\n");
-  printf("  -prefix <string> .... prefix for dumped frames "
-                                  "(default: 'dump_')\n");
-  printf("  -tiff ............... save frames as TIFF\n");
-  printf("  -pam ................ save frames as PAM\n");
-  printf("  -h .................. this help\n");
-  printf("  -version ............ print version number and exit\n");
-}
-
-int main(int argc, const char* argv[]) {
-  int error = 0;
-  const W_CHAR* dump_folder = TO_W_CHAR(".");
-  const W_CHAR* prefix = TO_W_CHAR("dump_");
-  const W_CHAR* suffix = TO_W_CHAR("png");
-  WebPOutputFileFormat format = PNG;
-  int c;
-
-  INIT_WARGV(argc, argv);
-
-  if (argc < 2) {
-    Help();
-    FREE_WARGV_AND_RETURN(-1);
-  }
-
-  for (c = 1; !error && c < argc; ++c) {
-    if (!strcmp(argv[c], "-folder")) {
-      if (c + 1 == argc) {
-        fprintf(stderr, "missing argument after option '%s'\n", argv[c]);
-        error = 1;
-        break;
-      }
-      dump_folder = GET_WARGV(argv, ++c);
-    } else if (!strcmp(argv[c], "-prefix")) {
-      if (c + 1 == argc) {
-        fprintf(stderr, "missing argument after option '%s'\n", argv[c]);
-        error = 1;
-        break;
-      }
-      prefix = GET_WARGV(argv, ++c);
-    } else if (!strcmp(argv[c], "-tiff")) {
-      format = TIFF;
-      suffix = TO_W_CHAR("tiff");
-    } else if (!strcmp(argv[c], "-pam")) {
-      format = PAM;
-      suffix = TO_W_CHAR("pam");
-    } else if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
-      Help();
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-version")) {
-      int dec_version, demux_version;
-      GetAnimatedImageVersions(&dec_version, &demux_version);
-      printf("WebP Decoder version: %d.%d.%d\nWebP Demux version: %d.%d.%d\n",
-             (dec_version >> 16) & 0xff, (dec_version >> 8) & 0xff,
-             (dec_version >> 0) & 0xff,
-             (demux_version >> 16) & 0xff, (demux_version >> 8) & 0xff,
-             (demux_version >> 0) & 0xff);
-      FREE_WARGV_AND_RETURN(0);
-    } else {
-      uint32_t i;
-      AnimatedImage image;
-      const W_CHAR* const file = GET_WARGV(argv, c);
-      memset(&image, 0, sizeof(image));
-      WPRINTF("Decoding file: %s as %s/%sxxxx.%s\n",
-              file, dump_folder, prefix, suffix);
-      if (!ReadAnimatedImage((const char*)file, &image, 0, NULL)) {
-        WFPRINTF(stderr, "Error decoding file: %s\n Aborting.\n", file);
-        error = 1;
-        break;
-      }
-      for (i = 0; !error && i < image.num_frames; ++i) {
-        W_CHAR out_file[1024];
-        WebPDecBuffer buffer;
-        WebPInitDecBuffer(&buffer);
-        buffer.colorspace = MODE_RGBA;
-        buffer.is_external_memory = 1;
-        buffer.width = image.canvas_width;
-        buffer.height = image.canvas_height;
-        buffer.u.RGBA.rgba = image.frames[i].rgba;
-        buffer.u.RGBA.stride = buffer.width * sizeof(uint32_t);
-        buffer.u.RGBA.size = buffer.u.RGBA.stride * buffer.height;
-        WSNPRINTF(out_file, sizeof(out_file), "%s/%s%.4d.%s",
-                  dump_folder, prefix, i, suffix);
-        if (!WebPSaveImage(&buffer, format, (const char*)out_file)) {
-          WFPRINTF(stderr, "Error while saving image '%s'\n", out_file);
-          error = 1;
-        }
-        WebPFreeDecBuffer(&buffer);
-      }
-      ClearAnimatedImage(&image);
-    }
-  }
-  FREE_WARGV_AND_RETURN(error ? 1 : 0);
-}

external/libwebp/libwebp/examples/anim_util.c

@@ -1,782 +0,0 @@
-// Copyright 2015 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Utilities for animated images
-
-#include "./anim_util.h"
-
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-#if defined(WEBP_HAVE_GIF)
-#include <gif_lib.h>
-#endif
-#include "webp/format_constants.h"
-#include "webp/decode.h"
-#include "webp/demux.h"
-#include "../imageio/imageio_util.h"
-#include "./gifdec.h"
-#include "./unicode.h"
-#include "./unicode_gif.h"
-
-#if defined(_MSC_VER) && _MSC_VER < 1900
-#define snprintf _snprintf
-#endif
-
-static const int kNumChannels = 4;
-
-// -----------------------------------------------------------------------------
-// Common utilities.
-
-#if defined(WEBP_HAVE_GIF)
-// Returns true if the frame covers the full canvas.
-static int IsFullFrame(int width, int height,
-                       int canvas_width, int canvas_height) {
-  return (width == canvas_width && height == canvas_height);
-}
-#endif // WEBP_HAVE_GIF
-
-static int CheckSizeForOverflow(uint64_t size) {
-  return (size == (size_t)size);
-}
-
-static int AllocateFrames(AnimatedImage* const image, uint32_t num_frames) {
-  uint32_t i;
-  uint8_t* mem = NULL;
-  DecodedFrame* frames = NULL;
-  const uint64_t rgba_size =
-      (uint64_t)image->canvas_width * kNumChannels * image->canvas_height;
-  const uint64_t total_size = (uint64_t)num_frames * rgba_size * sizeof(*mem);
-  const uint64_t total_frame_size = (uint64_t)num_frames * sizeof(*frames);
-  if (!CheckSizeForOverflow(total_size) ||
-      !CheckSizeForOverflow(total_frame_size)) {
-    return 0;
-  }
-  mem = (uint8_t*)WebPMalloc((size_t)total_size);
-  frames = (DecodedFrame*)WebPMalloc((size_t)total_frame_size);
-
-  if (mem == NULL || frames == NULL) {
-    WebPFree(mem);
-    WebPFree(frames);
-    return 0;
-  }
-  WebPFree(image->raw_mem);
-  image->num_frames = num_frames;
-  image->frames = frames;
-  for (i = 0; i < num_frames; ++i) {
-    frames[i].rgba = mem + i * rgba_size;
-    frames[i].duration = 0;
-    frames[i].is_key_frame = 0;
-  }
-  image->raw_mem = mem;
-  return 1;
-}
-
-void ClearAnimatedImage(AnimatedImage* const image) {
-  if (image != NULL) {
-    WebPFree(image->raw_mem);
-    WebPFree(image->frames);
-    image->num_frames = 0;
-    image->frames = NULL;
-    image->raw_mem = NULL;
-  }
-}
-
-#if defined(WEBP_HAVE_GIF)
-// Clear the canvas to transparent.
-static void ZeroFillCanvas(uint8_t* rgba,
-                           uint32_t canvas_width, uint32_t canvas_height) {
-  memset(rgba, 0, canvas_width * kNumChannels * canvas_height);
-}
-
-// Clear given frame rectangle to transparent.
-static void ZeroFillFrameRect(uint8_t* rgba, int rgba_stride, int x_offset,
-                              int y_offset, int width, int height) {
-  int j;
-  assert(width * kNumChannels <= rgba_stride);
-  rgba += y_offset * rgba_stride + x_offset * kNumChannels;
-  for (j = 0; j < height; ++j) {
-    memset(rgba, 0, width * kNumChannels);
-    rgba += rgba_stride;
-  }
-}
-
-// Copy width * height pixels from 'src' to 'dst'.
-static void CopyCanvas(const uint8_t* src, uint8_t* dst,
-                       uint32_t width, uint32_t height) {
-  assert(src != NULL && dst != NULL);
-  memcpy(dst, src, width * kNumChannels * height);
-}
-
-// Copy pixels in the given rectangle from 'src' to 'dst' honoring the 'stride'.
-static void CopyFrameRectangle(const uint8_t* src, uint8_t* dst, int stride,
-                               int x_offset, int y_offset,
-                               int width, int height) {
-  int j;
-  const int width_in_bytes = width * kNumChannels;
-  const size_t offset = y_offset * stride + x_offset * kNumChannels;
-  assert(width_in_bytes <= stride);
-  src += offset;
-  dst += offset;
-  for (j = 0; j < height; ++j) {
-    memcpy(dst, src, width_in_bytes);
-    src += stride;
-    dst += stride;
-  }
-}
-#endif // WEBP_HAVE_GIF
-
-// Canonicalize all transparent pixels to transparent black to aid comparison.
-static void CleanupTransparentPixels(uint32_t* rgba,
-                                     uint32_t width, uint32_t height) {
-  const uint32_t* const rgba_end = rgba + width * height;
-  while (rgba < rgba_end) {
-    const uint8_t alpha = (*rgba >> 24) & 0xff;
-    if (alpha == 0) {
-      *rgba = 0;
-    }
-    ++rgba;
-  }
-}
-
-// Dump frame to a PAM file. Returns true on success.
-static int DumpFrame(const char filename[], const char dump_folder[],
-                     uint32_t frame_num, const uint8_t rgba[],
-                     int canvas_width, int canvas_height) {
-  int ok = 0;
-  size_t max_len;
-  int y;
-  const W_CHAR* base_name = NULL;
-  W_CHAR* file_name = NULL;
-  FILE* f = NULL;
-  const char* row;
-
-  if (dump_folder == NULL) dump_folder = (const char*)TO_W_CHAR(".");
-
-  base_name = WSTRRCHR(filename, '/');
-  base_name = (base_name == NULL) ? (const W_CHAR*)filename : base_name + 1;
-  max_len = WSTRLEN(dump_folder) + 1 + WSTRLEN(base_name)
-          + strlen("_frame_") + strlen(".pam") + 8;
-  file_name = (W_CHAR*)WebPMalloc(max_len * sizeof(*file_name));
-  if (file_name == NULL) goto End;
-
-  if (WSNPRINTF(file_name, max_len, "%s/%s_frame_%d.pam",
-                (const W_CHAR*)dump_folder, base_name, frame_num) < 0) {
-    fprintf(stderr, "Error while generating file name\n");
-    goto End;
-  }
-
-  f = WFOPEN(file_name, "wb");
-  if (f == NULL) {
-    WFPRINTF(stderr, "Error opening file for writing: %s\n", file_name);
-    ok = 0;
-    goto End;
-  }
-  if (fprintf(f, "P7\nWIDTH %d\nHEIGHT %d\n"
-              "DEPTH 4\nMAXVAL 255\nTUPLTYPE RGB_ALPHA\nENDHDR\n",
-              canvas_width, canvas_height) < 0) {
-    WFPRINTF(stderr, "Write error for file %s\n", file_name);
-    goto End;
-  }
-  row = (const char*)rgba;
-  for (y = 0; y < canvas_height; ++y) {
-    if (fwrite(row, canvas_width * kNumChannels, 1, f) != 1) {
-      WFPRINTF(stderr, "Error writing to file: %s\n", file_name);
-      goto End;
-    }
-    row += canvas_width * kNumChannels;
-  }
-  ok = 1;
- End:
-  if (f != NULL) fclose(f);
-  WebPFree(file_name);
-  return ok;
-}
-
-// -----------------------------------------------------------------------------
-// WebP Decoding.
-
-// Returns true if this is a valid WebP bitstream.
-static int IsWebP(const WebPData* const webp_data) {
-  return (WebPGetInfo(webp_data->bytes, webp_data->size, NULL, NULL) != 0);
-}
-
-// Read animated WebP bitstream 'webp_data' into 'AnimatedImage' struct.
-static int ReadAnimatedWebP(const char filename[],
-                            const WebPData* const webp_data,
-                            AnimatedImage* const image, int dump_frames,
-                            const char dump_folder[]) {
-  int ok = 0;
-  int dump_ok = 1;
-  uint32_t frame_index = 0;
-  int prev_frame_timestamp = 0;
-  WebPAnimDecoder* dec;
-  WebPAnimInfo anim_info;
-
-  memset(image, 0, sizeof(*image));
-
-  dec = WebPAnimDecoderNew(webp_data, NULL);
-  if (dec == NULL) {
-    WFPRINTF(stderr, "Error parsing image: %s\n", (const W_CHAR*)filename);
-    goto End;
-  }
-
-  if (!WebPAnimDecoderGetInfo(dec, &anim_info)) {
-    fprintf(stderr, "Error getting global info about the animation\n");
-    goto End;
-  }
-
-  // Animation properties.
-  image->canvas_width = anim_info.canvas_width;
-  image->canvas_height = anim_info.canvas_height;
-  image->loop_count = anim_info.loop_count;
-  image->bgcolor = anim_info.bgcolor;
-
-  // Allocate frames.
-  if (!AllocateFrames(image, anim_info.frame_count)) goto End;
-
-  // Decode frames.
-  while (WebPAnimDecoderHasMoreFrames(dec)) {
-    DecodedFrame* curr_frame;
-    uint8_t* curr_rgba;
-    uint8_t* frame_rgba;
-    int timestamp;
-
-    if (!WebPAnimDecoderGetNext(dec, &frame_rgba, &timestamp)) {
-      fprintf(stderr, "Error decoding frame #%u\n", frame_index);
-      goto End;
-    }
-    assert(frame_index < anim_info.frame_count);
-    curr_frame = &image->frames[frame_index];
-    curr_rgba = curr_frame->rgba;
-    curr_frame->duration = timestamp - prev_frame_timestamp;
-    curr_frame->is_key_frame = 0;  // Unused.
-    memcpy(curr_rgba, frame_rgba,
-           image->canvas_width * kNumChannels * image->canvas_height);
-
-    // Needed only because we may want to compare with GIF later.
-    CleanupTransparentPixels((uint32_t*)curr_rgba,
-                             image->canvas_width, image->canvas_height);
-
-    if (dump_frames && dump_ok) {
-      dump_ok = DumpFrame(filename, dump_folder, frame_index, curr_rgba,
-                          image->canvas_width, image->canvas_height);
-      if (!dump_ok) {  // Print error once, but continue decode loop.
-        fprintf(stderr, "Error dumping frames to %s\n", dump_folder);
-      }
-    }
-
-    ++frame_index;
-    prev_frame_timestamp = timestamp;
-  }
-  ok = dump_ok;
-  if (ok) image->format = ANIM_WEBP;
-
- End:
-  WebPAnimDecoderDelete(dec);
-  return ok;
-}
-
-// -----------------------------------------------------------------------------
-// GIF Decoding.
-
-#if defined(WEBP_HAVE_GIF)
-
-// Returns true if this is a valid GIF bitstream.
-static int IsGIF(const WebPData* const data) {
-  return data->size > GIF_STAMP_LEN &&
-         (!memcmp(GIF_STAMP, data->bytes, GIF_STAMP_LEN) ||
-          !memcmp(GIF87_STAMP, data->bytes, GIF_STAMP_LEN) ||
-          !memcmp(GIF89_STAMP, data->bytes, GIF_STAMP_LEN));
-}
-
-// GIFLIB_MAJOR is only defined in libgif >= 4.2.0.
-#if defined(GIFLIB_MAJOR) && defined(GIFLIB_MINOR)
-# define LOCAL_GIF_VERSION ((GIFLIB_MAJOR << 8) | GIFLIB_MINOR)
-# define LOCAL_GIF_PREREQ(maj, min) \
-    (LOCAL_GIF_VERSION >= (((maj) << 8) | (min)))
-#else
-# define LOCAL_GIF_VERSION 0
-# define LOCAL_GIF_PREREQ(maj, min) 0
-#endif
-
-#if !LOCAL_GIF_PREREQ(5, 0)
-
-// Added in v5.0
-typedef struct {
-  int DisposalMode;
-#define DISPOSAL_UNSPECIFIED      0       // No disposal specified
-#define DISPOSE_DO_NOT            1       // Leave image in place
-#define DISPOSE_BACKGROUND        2       // Set area to background color
-#define DISPOSE_PREVIOUS          3       // Restore to previous content
-  int UserInputFlag;       // User confirmation required before disposal
-  int DelayTime;           // Pre-display delay in 0.01sec units
-  int TransparentColor;    // Palette index for transparency, -1 if none
-#define NO_TRANSPARENT_COLOR     -1
-} GraphicsControlBlock;
-
-static int DGifExtensionToGCB(const size_t GifExtensionLength,
-                              const GifByteType* GifExtension,
-                              GraphicsControlBlock* gcb) {
-  if (GifExtensionLength != 4) {
-    return GIF_ERROR;
-  }
-  gcb->DisposalMode = (GifExtension[0] >> 2) & 0x07;
-  gcb->UserInputFlag = (GifExtension[0] & 0x02) != 0;
-  gcb->DelayTime = GifExtension[1] | (GifExtension[2] << 8);
-  if (GifExtension[0] & 0x01) {
-    gcb->TransparentColor = (int)GifExtension[3];
-  } else {
-    gcb->TransparentColor = NO_TRANSPARENT_COLOR;
-  }
-  return GIF_OK;
-}
-
-static int DGifSavedExtensionToGCB(GifFileType* GifFile, int ImageIndex,
-                                   GraphicsControlBlock* gcb) {
-  int i;
-  if (ImageIndex < 0 || ImageIndex > GifFile->ImageCount - 1) {
-    return GIF_ERROR;
-  }
-  gcb->DisposalMode = DISPOSAL_UNSPECIFIED;
-  gcb->UserInputFlag = 0;
-  gcb->DelayTime = 0;
-  gcb->TransparentColor = NO_TRANSPARENT_COLOR;
-
-  for (i = 0; i < GifFile->SavedImages[ImageIndex].ExtensionBlockCount; i++) {
-    ExtensionBlock* ep = &GifFile->SavedImages[ImageIndex].ExtensionBlocks[i];
-    if (ep->Function == GRAPHICS_EXT_FUNC_CODE) {
-      return DGifExtensionToGCB(
-          ep->ByteCount, (const GifByteType*)ep->Bytes, gcb);
-    }
-  }
-  return GIF_ERROR;
-}
-
-#define CONTINUE_EXT_FUNC_CODE 0x00
-
-// Signature was changed in v5.0
-#define DGifOpenFileName(a, b) DGifOpenFileName(a)
-
-#endif  // !LOCAL_GIF_PREREQ(5, 0)
-
-// Signature changed in v5.1
-#if !LOCAL_GIF_PREREQ(5, 1)
-#define DGifCloseFile(a, b) DGifCloseFile(a)
-#endif
-
-static int IsKeyFrameGIF(const GifImageDesc* prev_desc, int prev_dispose,
-                         const DecodedFrame* const prev_frame,
-                         int canvas_width, int canvas_height) {
-  if (prev_frame == NULL) return 1;
-  if (prev_dispose == DISPOSE_BACKGROUND) {
-    if (IsFullFrame(prev_desc->Width, prev_desc->Height,
-                    canvas_width, canvas_height)) {
-      return 1;
-    }
-    if (prev_frame->is_key_frame) return 1;
-  }
-  return 0;
-}
-
-static int GetTransparentIndexGIF(GifFileType* gif) {
-  GraphicsControlBlock first_gcb;
-  memset(&first_gcb, 0, sizeof(first_gcb));
-  DGifSavedExtensionToGCB(gif, 0, &first_gcb);
-  return first_gcb.TransparentColor;
-}
-
-static uint32_t GetBackgroundColorGIF(GifFileType* gif) {
-  const int transparent_index = GetTransparentIndexGIF(gif);
-  const ColorMapObject* const color_map = gif->SColorMap;
-  if (transparent_index != NO_TRANSPARENT_COLOR &&
-      gif->SBackGroundColor == transparent_index) {
-    return 0x00000000;  // Special case: transparent black.
-  } else if (color_map == NULL || color_map->Colors == NULL
-             || gif->SBackGroundColor >= color_map->ColorCount) {
-    return 0xffffffff;  // Invalid: assume white.
-  } else {
-    const GifColorType color = color_map->Colors[gif->SBackGroundColor];
-    return (0xffu << 24) |
-           (color.Red << 16) |
-           (color.Green << 8) |
-           (color.Blue << 0);
-  }
-}
-
-// Find appropriate app extension and get loop count from the next extension.
-// We use Chrome's interpretation of the 'loop_count' semantics:
-//   if not present -> loop once
-//   if present and loop_count == 0, return 0 ('infinite').
-//   if present and loop_count != 0, it's the number of *extra* loops
-//     so we need to return loop_count + 1 as total loop number.
-static uint32_t GetLoopCountGIF(const GifFileType* const gif) {
-  int i;
-  for (i = 0; i < gif->ImageCount; ++i) {
-    const SavedImage* const image = &gif->SavedImages[i];
-    int j;
-    for (j = 0; (j + 1) < image->ExtensionBlockCount; ++j) {
-      const ExtensionBlock* const eb1 = image->ExtensionBlocks + j;
-      const ExtensionBlock* const eb2 = image->ExtensionBlocks + j + 1;
-      const char* const signature = (const char*)eb1->Bytes;
-      const int signature_is_ok =
-          (eb1->Function == APPLICATION_EXT_FUNC_CODE) &&
-          (eb1->ByteCount == 11) &&
-          (!memcmp(signature, "NETSCAPE2.0", 11) ||
-           !memcmp(signature, "ANIMEXTS1.0", 11));
-      if (signature_is_ok &&
-          eb2->Function == CONTINUE_EXT_FUNC_CODE && eb2->ByteCount >= 3 &&
-          eb2->Bytes[0] == 1) {
-        const uint32_t extra_loop = ((uint32_t)(eb2->Bytes[2]) << 8) +
-                                    ((uint32_t)(eb2->Bytes[1]) << 0);
-        return (extra_loop > 0) ? extra_loop + 1 : 0;
-      }
-    }
-  }
-  return 1;  // Default.
-}
-
-// Get duration of 'n'th frame in milliseconds.
-static int GetFrameDurationGIF(GifFileType* gif, int n) {
-  GraphicsControlBlock gcb;
-  memset(&gcb, 0, sizeof(gcb));
-  DGifSavedExtensionToGCB(gif, n, &gcb);
-  return gcb.DelayTime * 10;
-}
-
-// Returns true if frame 'target' completely covers 'covered'.
-static int CoversFrameGIF(const GifImageDesc* const target,
-                          const GifImageDesc* const covered) {
-  return target->Left <= covered->Left &&
-         covered->Left + covered->Width <= target->Left + target->Width &&
-         target->Top <= covered->Top &&
-         covered->Top + covered->Height <= target->Top + target->Height;
-}
-
-static void RemapPixelsGIF(const uint8_t* const src,
-                           const ColorMapObject* const cmap,
-                           int transparent_color, int len, uint8_t* dst) {
-  int i;
-  for (i = 0; i < len; ++i) {
-    if (src[i] != transparent_color) {
-      // If a pixel in the current frame is transparent, we don't modify it, so
-      // that we can see-through the corresponding pixel from an earlier frame.
-      const GifColorType c = cmap->Colors[src[i]];
-      dst[4 * i + 0] = c.Red;
-      dst[4 * i + 1] = c.Green;
-      dst[4 * i + 2] = c.Blue;
-      dst[4 * i + 3] = 0xff;
-    }
-  }
-}
-
-static int ReadFrameGIF(const SavedImage* const gif_image,
-                        const ColorMapObject* cmap, int transparent_color,
-                        int out_stride, uint8_t* const dst) {
-  const GifImageDesc* image_desc = &gif_image->ImageDesc;
-  const uint8_t* in;
-  uint8_t* out;
-  int j;
-
-  if (image_desc->ColorMap) cmap = image_desc->ColorMap;
-
-  if (cmap == NULL || cmap->ColorCount != (1 << cmap->BitsPerPixel)) {
-    fprintf(stderr, "Potentially corrupt color map.\n");
-    return 0;
-  }
-
-  in = (const uint8_t*)gif_image->RasterBits;
-  out = dst + image_desc->Top * out_stride + image_desc->Left * kNumChannels;
-
-  for (j = 0; j < image_desc->Height; ++j) {
-    RemapPixelsGIF(in, cmap, transparent_color, image_desc->Width, out);
-    in += image_desc->Width;
-    out += out_stride;
-  }
-  return 1;
-}
-
-// Read animated GIF bitstream from 'filename' into 'AnimatedImage' struct.
-static int ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
-                           int dump_frames, const char dump_folder[]) {
-  uint32_t frame_count;
-  uint32_t canvas_width, canvas_height;
-  uint32_t i;
-  int gif_error;
-  GifFileType* gif;
-
-  gif = DGifOpenFileUnicode((const W_CHAR*)filename, NULL);
-  if (gif == NULL) {
-    WFPRINTF(stderr, "Could not read file: %s.\n", (const W_CHAR*)filename);
-    return 0;
-  }
-
-  gif_error = DGifSlurp(gif);
-  if (gif_error != GIF_OK) {
-    WFPRINTF(stderr, "Could not parse image: %s.\n", (const W_CHAR*)filename);
-    GIFDisplayError(gif, gif_error);
-    DGifCloseFile(gif, NULL);
-    return 0;
-  }
-
-  // Animation properties.
-  image->canvas_width = (uint32_t)gif->SWidth;
-  image->canvas_height = (uint32_t)gif->SHeight;
-  if (image->canvas_width > MAX_CANVAS_SIZE ||
-      image->canvas_height > MAX_CANVAS_SIZE) {
-    fprintf(stderr, "Invalid canvas dimension: %d x %d\n",
-            image->canvas_width, image->canvas_height);
-    DGifCloseFile(gif, NULL);
-    return 0;
-  }
-  image->loop_count = GetLoopCountGIF(gif);
-  image->bgcolor = GetBackgroundColorGIF(gif);
-
-  frame_count = (uint32_t)gif->ImageCount;
-  if (frame_count == 0) {
-    DGifCloseFile(gif, NULL);
-    return 0;
-  }
-
-  if (image->canvas_width == 0 || image->canvas_height == 0) {
-    image->canvas_width = gif->SavedImages[0].ImageDesc.Width;
-    image->canvas_height = gif->SavedImages[0].ImageDesc.Height;
-    gif->SavedImages[0].ImageDesc.Left = 0;
-    gif->SavedImages[0].ImageDesc.Top = 0;
-    if (image->canvas_width == 0 || image->canvas_height == 0) {
-      fprintf(stderr, "Invalid canvas size in GIF.\n");
-      DGifCloseFile(gif, NULL);
-      return 0;
-    }
-  }
-  // Allocate frames.
-  if (!AllocateFrames(image, frame_count)) {
-    DGifCloseFile(gif, NULL);
-    return 0;
-  }
-
-  canvas_width = image->canvas_width;
-  canvas_height = image->canvas_height;
-
-  // Decode and reconstruct frames.
-  for (i = 0; i < frame_count; ++i) {
-    const int canvas_width_in_bytes = canvas_width * kNumChannels;
-    const SavedImage* const curr_gif_image = &gif->SavedImages[i];
-    GraphicsControlBlock curr_gcb;
-    DecodedFrame* curr_frame;
-    uint8_t* curr_rgba;
-
-    memset(&curr_gcb, 0, sizeof(curr_gcb));
-    DGifSavedExtensionToGCB(gif, i, &curr_gcb);
-
-    curr_frame = &image->frames[i];
-    curr_rgba = curr_frame->rgba;
-    curr_frame->duration = GetFrameDurationGIF(gif, i);
-    // Force frames with a small or no duration to 100ms to be consistent
-    // with web browsers and other transcoding tools (like gif2webp itself).
-    if (curr_frame->duration <= 10) curr_frame->duration = 100;
-
-    if (i == 0) {  // Initialize as transparent.
-      curr_frame->is_key_frame = 1;
-      ZeroFillCanvas(curr_rgba, canvas_width, canvas_height);
-    } else {
-      DecodedFrame* const prev_frame = &image->frames[i - 1];
-      const GifImageDesc* const prev_desc = &gif->SavedImages[i - 1].ImageDesc;
-      GraphicsControlBlock prev_gcb;
-      memset(&prev_gcb, 0, sizeof(prev_gcb));
-      DGifSavedExtensionToGCB(gif, i - 1, &prev_gcb);
-
-      curr_frame->is_key_frame =
-          IsKeyFrameGIF(prev_desc, prev_gcb.DisposalMode, prev_frame,
-                        canvas_width, canvas_height);
-
-      if (curr_frame->is_key_frame) {  // Initialize as transparent.
-        ZeroFillCanvas(curr_rgba, canvas_width, canvas_height);
-      } else {
-        int prev_frame_disposed, curr_frame_opaque;
-        int prev_frame_completely_covered;
-        // Initialize with previous canvas.
-        uint8_t* const prev_rgba = image->frames[i - 1].rgba;
-        CopyCanvas(prev_rgba, curr_rgba, canvas_width, canvas_height);
-
-        // Dispose previous frame rectangle.
-        prev_frame_disposed =
-            (prev_gcb.DisposalMode == DISPOSE_BACKGROUND ||
-             prev_gcb.DisposalMode == DISPOSE_PREVIOUS);
-        curr_frame_opaque =
-            (curr_gcb.TransparentColor == NO_TRANSPARENT_COLOR);
-        prev_frame_completely_covered =
-            curr_frame_opaque &&
-            CoversFrameGIF(&curr_gif_image->ImageDesc, prev_desc);
-
-        if (prev_frame_disposed && !prev_frame_completely_covered) {
-          switch (prev_gcb.DisposalMode) {
-            case DISPOSE_BACKGROUND: {
-              ZeroFillFrameRect(curr_rgba, canvas_width_in_bytes,
-                                prev_desc->Left, prev_desc->Top,
-                                prev_desc->Width, prev_desc->Height);
-              break;
-            }
-            case DISPOSE_PREVIOUS: {
-              int src_frame_num = i - 2;
-              while (src_frame_num >= 0) {
-                GraphicsControlBlock src_frame_gcb;
-                memset(&src_frame_gcb, 0, sizeof(src_frame_gcb));
-                DGifSavedExtensionToGCB(gif, src_frame_num, &src_frame_gcb);
-                if (src_frame_gcb.DisposalMode != DISPOSE_PREVIOUS) break;
-                --src_frame_num;
-              }
-              if (src_frame_num >= 0) {
-                // Restore pixels inside previous frame rectangle to
-                // corresponding pixels in source canvas.
-                uint8_t* const src_frame_rgba =
-                    image->frames[src_frame_num].rgba;
-                CopyFrameRectangle(src_frame_rgba, curr_rgba,
-                                   canvas_width_in_bytes,
-                                   prev_desc->Left, prev_desc->Top,
-                                   prev_desc->Width, prev_desc->Height);
-              } else {
-                // Source canvas doesn't exist. So clear previous frame
-                // rectangle to background.
-                ZeroFillFrameRect(curr_rgba, canvas_width_in_bytes,
-                                  prev_desc->Left, prev_desc->Top,
-                                  prev_desc->Width, prev_desc->Height);
-              }
-              break;
-            }
-            default:
-              break;  // Nothing to do.
-          }
-        }
-      }
-    }
-
-    // Decode current frame.
-    if (!ReadFrameGIF(curr_gif_image, gif->SColorMap, curr_gcb.TransparentColor,
-                      canvas_width_in_bytes, curr_rgba)) {
-      DGifCloseFile(gif, NULL);
-      return 0;
-    }
-
-    if (dump_frames) {
-      if (!DumpFrame(filename, dump_folder, i, curr_rgba,
-                     canvas_width, canvas_height)) {
-        DGifCloseFile(gif, NULL);
-        return 0;
-      }
-    }
-  }
-  image->format = ANIM_GIF;
-  DGifCloseFile(gif, NULL);
-  return 1;
-}
-
-#else
-
-static int IsGIF(const WebPData* const data) {
-  (void)data;
-  return 0;
-}
-
-static int ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
-                           int dump_frames, const char dump_folder[]) {
-  (void)filename;
-  (void)image;
-  (void)dump_frames;
-  (void)dump_folder;
-  fprintf(stderr, "GIF support not compiled. Please install the libgif-dev "
-          "package before building.\n");
-  return 0;
-}
-
-#endif  // WEBP_HAVE_GIF
-
-// -----------------------------------------------------------------------------
-
-int ReadAnimatedImage(const char filename[], AnimatedImage* const image,
-                      int dump_frames, const char dump_folder[]) {
-  int ok = 0;
-  WebPData webp_data;
-
-  WebPDataInit(&webp_data);
-  memset(image, 0, sizeof(*image));
-
-  if (!ImgIoUtilReadFile(filename, &webp_data.bytes, &webp_data.size)) {
-    WFPRINTF(stderr, "Error reading file: %s\n", (const W_CHAR*)filename);
-    return 0;
-  }
-
-  if (IsWebP(&webp_data)) {
-    ok = ReadAnimatedWebP(filename, &webp_data, image, dump_frames,
-                          dump_folder);
-  } else if (IsGIF(&webp_data)) {
-    ok = ReadAnimatedGIF(filename, image, dump_frames, dump_folder);
-  } else {
-    WFPRINTF(stderr,
-             "Unknown file type: %s. Supported file types are WebP and GIF\n",
-             (const W_CHAR*)filename);
-    ok = 0;
-  }
-  if (!ok) ClearAnimatedImage(image);
-  WebPDataClear(&webp_data);
-  return ok;
-}
-
-static void Accumulate(double v1, double v2, double* const max_diff,
-                       double* const sse) {
-  const double diff = fabs(v1 - v2);
-  if (diff > *max_diff) *max_diff = diff;
-  *sse += diff * diff;
-}
-
-void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],
-                    uint32_t width, uint32_t height, int premultiply,
-                    int* const max_diff, double* const psnr) {
-  const uint32_t stride = width * kNumChannels;
-  const int kAlphaChannel = kNumChannels - 1;
-  double f_max_diff = 0.;
-  double sse = 0.;
-  uint32_t x, y;
-  for (y = 0; y < height; ++y) {
-    for (x = 0; x < stride; x += kNumChannels) {
-      int k;
-      const size_t offset = (size_t)y * stride + x;
-      const int alpha1 = rgba1[offset + kAlphaChannel];
-      const int alpha2 = rgba2[offset + kAlphaChannel];
-      Accumulate(alpha1, alpha2, &f_max_diff, &sse);
-      if (!premultiply) {
-        for (k = 0; k < kAlphaChannel; ++k) {
-          Accumulate(rgba1[offset + k], rgba2[offset + k], &f_max_diff, &sse);
-        }
-      } else {
-        // premultiply R/G/B channels with alpha value
-        for (k = 0; k < kAlphaChannel; ++k) {
-          Accumulate(rgba1[offset + k] * alpha1 / 255.,
-                     rgba2[offset + k] * alpha2 / 255.,
-                     &f_max_diff, &sse);
-        }
-      }
-    }
-  }
-  *max_diff = (int)f_max_diff;
-  if (*max_diff == 0) {
-    *psnr = 99.;  // PSNR when images are identical.
-  } else {
-    sse /= stride * height;
-    *psnr = 4.3429448 * log(255. * 255. / sse);
-  }
-}
-
-void GetAnimatedImageVersions(int* const decoder_version,
-                              int* const demux_version) {
-  *decoder_version = WebPGetDecoderVersion();
-  *demux_version = WebPGetDemuxVersion();
-}

external/libwebp/libwebp/examples/anim_util.h

@@ -1,73 +0,0 @@
-// Copyright 2015 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Utilities for animated images
-
-#ifndef WEBP_EXAMPLES_ANIM_UTIL_H_
-#define WEBP_EXAMPLES_ANIM_UTIL_H_
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
-  ANIM_GIF,
-  ANIM_WEBP
-} AnimatedFileFormat;
-
-typedef struct {
-  uint8_t* rgba;         // Decoded and reconstructed full frame.
-  int duration;          // Frame duration in milliseconds.
-  int is_key_frame;      // True if this frame is a key-frame.
-} DecodedFrame;
-
-typedef struct {
-  AnimatedFileFormat format;
-  uint32_t canvas_width;
-  uint32_t canvas_height;
-  uint32_t bgcolor;
-  uint32_t loop_count;
-  DecodedFrame* frames;
-  uint32_t num_frames;
-  void* raw_mem;
-} AnimatedImage;
-
-// Deallocate everything in 'image' (but not the object itself).
-void ClearAnimatedImage(AnimatedImage* const image);
-
-// Read animated image file into 'AnimatedImage' struct.
-// If 'dump_frames' is true, dump frames to 'dump_folder'.
-// Previous content of 'image' is obliterated.
-// Upon successful return, content of 'image' must be deleted by
-// calling 'ClearAnimatedImage'.
-int ReadAnimatedImage(const char filename[], AnimatedImage* const image,
-                      int dump_frames, const char dump_folder[]);
-
-// Given two RGBA buffers, calculate max pixel difference and PSNR.
-// If 'premultiply' is true, R/G/B values will be pre-multiplied by the
-// transparency before comparison.
-void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],
-                    uint32_t width, uint32_t height, int premultiply,
-                    int* const max_diff, double* const psnr);
-
-// Return library versions used by anim_util.
-void GetAnimatedImageVersions(int* const decoder_version,
-                              int* const demux_version);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_EXAMPLES_ANIM_UTIL_H_

external/libwebp/libwebp/examples/dwebp.c

@@ -1,421 +0,0 @@
-// Copyright 2010 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Command-line tool for decoding a WebP image.
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include "../examples/example_util.h"
-#include "../imageio/image_enc.h"
-#include "../imageio/webpdec.h"
-#include "./stopwatch.h"
-#include "./unicode.h"
-
-static int verbose = 0;
-static int quiet = 0;
-#ifndef WEBP_DLL
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-extern void* VP8GetCPUInfo;   // opaque forward declaration.
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-#endif  // WEBP_DLL
-
-
-static int SaveOutput(const WebPDecBuffer* const buffer,
-                      WebPOutputFileFormat format, const char* const out_file) {
-  const int use_stdout = (out_file != NULL) && !WSTRCMP(out_file, "-");
-  int ok = 1;
-  Stopwatch stop_watch;
-
-  if (verbose) {
-    StopwatchReset(&stop_watch);
-  }
-  ok = WebPSaveImage(buffer, format, out_file);
-
-  if (ok) {
-    if (!quiet) {
-      if (use_stdout) {
-        fprintf(stderr, "Saved to stdout\n");
-      } else {
-        WFPRINTF(stderr, "Saved file %s\n", (const W_CHAR*)out_file);
-      }
-    }
-    if (verbose) {
-      const double write_time = StopwatchReadAndReset(&stop_watch);
-      fprintf(stderr, "Time to write output: %.3fs\n", write_time);
-    }
-  } else {
-    if (use_stdout) {
-      fprintf(stderr, "Error writing to stdout !!\n");
-    } else {
-      WFPRINTF(stderr, "Error writing file %s !!\n", (const W_CHAR*)out_file);
-    }
-  }
-  return ok;
-}
-
-static void Help(void) {
-  printf("Usage: dwebp in_file [options] [-o out_file]\n\n"
-         "Decodes the WebP image file to PNG format [Default].\n"
-         "Note: Animated WebP files are not supported.\n\n"
-         "Use following options to convert into alternate image formats:\n"
-         "  -pam ......... save the raw RGBA samples as a color PAM\n"
-         "  -ppm ......... save the raw RGB samples as a color PPM\n"
-         "  -bmp ......... save as uncompressed BMP format\n"
-         "  -tiff ........ save as uncompressed TIFF format\n"
-         "  -pgm ......... save the raw YUV samples as a grayscale PGM\n"
-         "                 file with IMC4 layout\n"
-         "  -yuv ......... save the raw YUV samples in flat layout\n"
-         "\n"
-         " Other options are:\n"
-         "  -version ..... print version number and exit\n"
-         "  -nofancy ..... don't use the fancy YUV420 upscaler\n"
-         "  -nofilter .... disable in-loop filtering\n"
-         "  -nodither .... disable dithering\n"
-         "  -dither <d> .. dithering strength (in 0..100)\n"
-         "  -alpha_dither  use alpha-plane dithering if needed\n"
-         "  -mt .......... use multi-threading\n"
-         "  -crop <x> <y> <w> <h> ... crop output with the given rectangle\n"
-         "  -resize <w> <h> ......... resize output (*after* any cropping)\n"
-         "  -flip ........ flip the output vertically\n"
-         "  -alpha ....... only save the alpha plane\n"
-         "  -incremental . use incremental decoding (useful for tests)\n"
-         "  -h ........... this help message\n"
-         "  -v ........... verbose (e.g. print encoding/decoding times)\n"
-         "  -quiet ....... quiet mode, don't print anything\n"
-#ifndef WEBP_DLL
-         "  -noasm ....... disable all assembly optimizations\n"
-#endif
-        );
-}
-
-static const char* const kFormatType[] = {
-  "unspecified", "lossy", "lossless"
-};
-
-static uint8_t* AllocateExternalBuffer(WebPDecoderConfig* config,
-                                       WebPOutputFileFormat format,
-                                       int use_external_memory) {
-  uint8_t* external_buffer = NULL;
-  WebPDecBuffer* const output_buffer = &config->output;
-  int w = config->input.width;
-  int h = config->input.height;
-  if (config->options.use_scaling) {
-    w = config->options.scaled_width;
-    h = config->options.scaled_height;
-  } else if (config->options.use_cropping) {
-    w = config->options.crop_width;
-    h = config->options.crop_height;
-  }
-  if (format >= RGB && format <= rgbA_4444) {
-    const int bpp = (format == RGB || format == BGR) ? 3
-                  : (format == RGBA_4444 || format == rgbA_4444 ||
-                     format == RGB_565) ? 2
-                  : 4;
-    uint32_t stride = bpp * w + 7;   // <- just for exercising
-    external_buffer = (uint8_t*)WebPMalloc(stride * h);
-    if (external_buffer == NULL) return NULL;
-    output_buffer->u.RGBA.stride = stride;
-    output_buffer->u.RGBA.size = stride * h;
-    output_buffer->u.RGBA.rgba = external_buffer;
-  } else {    // YUV and YUVA
-    const int has_alpha = WebPIsAlphaMode(output_buffer->colorspace);
-    uint8_t* tmp;
-    uint32_t stride = w + 3;
-    uint32_t uv_stride = (w + 1) / 2 + 13;
-    uint32_t total_size = stride * h * (has_alpha ? 2 : 1)
-                        + 2 * uv_stride * (h + 1) / 2;
-    assert(format >= YUV && format <= YUVA);
-    external_buffer = (uint8_t*)WebPMalloc(total_size);
-    if (external_buffer == NULL) return NULL;
-    tmp = external_buffer;
-    output_buffer->u.YUVA.y = tmp;
-    output_buffer->u.YUVA.y_stride = stride;
-    output_buffer->u.YUVA.y_size = stride * h;
-    tmp += output_buffer->u.YUVA.y_size;
-    if (has_alpha) {
-      output_buffer->u.YUVA.a = tmp;
-      output_buffer->u.YUVA.a_stride = stride;
-      output_buffer->u.YUVA.a_size = stride * h;
-      tmp += output_buffer->u.YUVA.a_size;
-    } else {
-      output_buffer->u.YUVA.a = NULL;
-      output_buffer->u.YUVA.a_stride = 0;
-    }
-    output_buffer->u.YUVA.u = tmp;
-    output_buffer->u.YUVA.u_stride = uv_stride;
-    output_buffer->u.YUVA.u_size = uv_stride * (h + 1) / 2;
-    tmp += output_buffer->u.YUVA.u_size;
-
-    output_buffer->u.YUVA.v = tmp;
-    output_buffer->u.YUVA.v_stride = uv_stride;
-    output_buffer->u.YUVA.v_size = uv_stride * (h + 1) / 2;
-    tmp += output_buffer->u.YUVA.v_size;
-    assert(tmp <= external_buffer + total_size);
-  }
-  output_buffer->is_external_memory = use_external_memory;
-  return external_buffer;
-}
-
-int main(int argc, const char* argv[]) {
-  int ok = 0;
-  const char* in_file = NULL;
-  const char* out_file = NULL;
-
-  WebPDecoderConfig config;
-  WebPDecBuffer* const output_buffer = &config.output;
-  WebPBitstreamFeatures* const bitstream = &config.input;
-  WebPOutputFileFormat format = PNG;
-  uint8_t* external_buffer = NULL;
-  int use_external_memory = 0;
-  const uint8_t* data = NULL;
-
-  int incremental = 0;
-  int c;
-
-  INIT_WARGV(argc, argv);
-
-  if (!WebPInitDecoderConfig(&config)) {
-    fprintf(stderr, "Library version mismatch!\n");
-    FREE_WARGV_AND_RETURN(-1);
-  }
-
-  for (c = 1; c < argc; ++c) {
-    int parse_error = 0;
-    if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
-      Help();
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-o") && c < argc - 1) {
-      out_file = (const char*)GET_WARGV(argv, ++c);
-    } else if (!strcmp(argv[c], "-alpha")) {
-      format = ALPHA_PLANE_ONLY;
-    } else if (!strcmp(argv[c], "-nofancy")) {
-      config.options.no_fancy_upsampling = 1;
-    } else if (!strcmp(argv[c], "-nofilter")) {
-      config.options.bypass_filtering = 1;
-    } else if (!strcmp(argv[c], "-pam")) {
-      format = PAM;
-    } else if (!strcmp(argv[c], "-ppm")) {
-      format = PPM;
-    } else if (!strcmp(argv[c], "-bmp")) {
-      format = BMP;
-    } else if (!strcmp(argv[c], "-tiff")) {
-      format = TIFF;
-    } else if (!strcmp(argv[c], "-quiet")) {
-      quiet = 1;
-    } else if (!strcmp(argv[c], "-version")) {
-      const int version = WebPGetDecoderVersion();
-      printf("%d.%d.%d\n",
-             (version >> 16) & 0xff, (version >> 8) & 0xff, version & 0xff);
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-pgm")) {
-      format = PGM;
-    } else if (!strcmp(argv[c], "-yuv")) {
-      format = RAW_YUV;
-    } else if (!strcmp(argv[c], "-pixel_format") && c < argc - 1) {
-      const char* const fmt = argv[++c];
-      if      (!strcmp(fmt, "RGB"))  format = RGB;
-      else if (!strcmp(fmt, "RGBA")) format = RGBA;
-      else if (!strcmp(fmt, "BGR"))  format = BGR;
-      else if (!strcmp(fmt, "BGRA")) format = BGRA;
-      else if (!strcmp(fmt, "ARGB")) format = ARGB;
-      else if (!strcmp(fmt, "RGBA_4444")) format = RGBA_4444;
-      else if (!strcmp(fmt, "RGB_565")) format = RGB_565;
-      else if (!strcmp(fmt, "rgbA")) format = rgbA;
-      else if (!strcmp(fmt, "bgrA")) format = bgrA;
-      else if (!strcmp(fmt, "Argb")) format = Argb;
-      else if (!strcmp(fmt, "rgbA_4444")) format = rgbA_4444;
-      else if (!strcmp(fmt, "YUV"))  format = YUV;
-      else if (!strcmp(fmt, "YUVA")) format = YUVA;
-      else {
-        fprintf(stderr, "Can't parse pixel_format %s\n", fmt);
-        parse_error = 1;
-      }
-    } else if (!strcmp(argv[c], "-external_memory") && c < argc - 1) {
-      use_external_memory = ExUtilGetInt(argv[++c], 0, &parse_error);
-      parse_error |= (use_external_memory > 2 || use_external_memory < 0);
-      if (parse_error) {
-        fprintf(stderr, "Can't parse 'external_memory' value %s\n", argv[c]);
-      }
-    } else if (!strcmp(argv[c], "-mt")) {
-      config.options.use_threads = 1;
-    } else if (!strcmp(argv[c], "-alpha_dither")) {
-      config.options.alpha_dithering_strength = 100;
-    } else if (!strcmp(argv[c], "-nodither")) {
-      config.options.dithering_strength = 0;
-    } else if (!strcmp(argv[c], "-dither") && c < argc - 1) {
-      config.options.dithering_strength =
-          ExUtilGetInt(argv[++c], 0, &parse_error);
-    } else if (!strcmp(argv[c], "-crop") && c < argc - 4) {
-      config.options.use_cropping = 1;
-      config.options.crop_left   = ExUtilGetInt(argv[++c], 0, &parse_error);
-      config.options.crop_top    = ExUtilGetInt(argv[++c], 0, &parse_error);
-      config.options.crop_width  = ExUtilGetInt(argv[++c], 0, &parse_error);
-      config.options.crop_height = ExUtilGetInt(argv[++c], 0, &parse_error);
-    } else if ((!strcmp(argv[c], "-scale") || !strcmp(argv[c], "-resize")) &&
-               c < argc - 2) {  // '-scale' is left for compatibility
-      config.options.use_scaling = 1;
-      config.options.scaled_width  = ExUtilGetInt(argv[++c], 0, &parse_error);
-      config.options.scaled_height = ExUtilGetInt(argv[++c], 0, &parse_error);
-    } else if (!strcmp(argv[c], "-flip")) {
-      config.options.flip = 1;
-    } else if (!strcmp(argv[c], "-v")) {
-      verbose = 1;
-#ifndef WEBP_DLL
-    } else if (!strcmp(argv[c], "-noasm")) {
-      VP8GetCPUInfo = NULL;
-#endif
-    } else if (!strcmp(argv[c], "-incremental")) {
-      incremental = 1;
-    } else if (!strcmp(argv[c], "--")) {
-      if (c < argc - 1) in_file = (const char*)GET_WARGV(argv, ++c);
-      break;
-    } else if (argv[c][0] == '-') {
-      fprintf(stderr, "Unknown option '%s'\n", argv[c]);
-      Help();
-      FREE_WARGV_AND_RETURN(-1);
-    } else {
-      in_file = (const char*)GET_WARGV(argv, c);
-    }
-
-    if (parse_error) {
-      Help();
-      FREE_WARGV_AND_RETURN(-1);
-    }
-  }
-
-  if (in_file == NULL) {
-    fprintf(stderr, "missing input file!!\n");
-    Help();
-    FREE_WARGV_AND_RETURN(-1);
-  }
-
-  if (quiet) verbose = 0;
-
-  {
-    VP8StatusCode status = VP8_STATUS_OK;
-    size_t data_size = 0;
-    if (!LoadWebP(in_file, &data, &data_size, bitstream)) {
-      FREE_WARGV_AND_RETURN(-1);
-    }
-
-    switch (format) {
-      case PNG:
-#ifdef HAVE_WINCODEC_H
-        output_buffer->colorspace = bitstream->has_alpha ? MODE_BGRA : MODE_BGR;
-#else
-        output_buffer->colorspace = bitstream->has_alpha ? MODE_RGBA : MODE_RGB;
-#endif
-        break;
-      case PAM:
-        output_buffer->colorspace = MODE_RGBA;
-        break;
-      case PPM:
-        output_buffer->colorspace = MODE_RGB;  // drops alpha for PPM
-        break;
-      case BMP:
-        output_buffer->colorspace = bitstream->has_alpha ? MODE_BGRA : MODE_BGR;
-        break;
-      case TIFF:
-        output_buffer->colorspace = bitstream->has_alpha ? MODE_RGBA : MODE_RGB;
-        break;
-      case PGM:
-      case RAW_YUV:
-        output_buffer->colorspace = bitstream->has_alpha ? MODE_YUVA : MODE_YUV;
-        break;
-      case ALPHA_PLANE_ONLY:
-        output_buffer->colorspace = MODE_YUVA;
-        break;
-      // forced modes:
-      case RGB: output_buffer->colorspace = MODE_RGB; break;
-      case RGBA: output_buffer->colorspace = MODE_RGBA; break;
-      case BGR: output_buffer->colorspace = MODE_BGR; break;
-      case BGRA: output_buffer->colorspace = MODE_BGRA; break;
-      case ARGB: output_buffer->colorspace = MODE_ARGB; break;
-      case RGBA_4444: output_buffer->colorspace = MODE_RGBA_4444; break;
-      case RGB_565: output_buffer->colorspace = MODE_RGB_565; break;
-      case rgbA: output_buffer->colorspace = MODE_rgbA; break;
-      case bgrA: output_buffer->colorspace = MODE_bgrA; break;
-      case Argb: output_buffer->colorspace = MODE_Argb; break;
-      case rgbA_4444: output_buffer->colorspace = MODE_rgbA_4444; break;
-      case YUV: output_buffer->colorspace = MODE_YUV; break;
-      case YUVA: output_buffer->colorspace = MODE_YUVA; break;
-      default: goto Exit;
-    }
-
-    if (use_external_memory > 0 && format >= RGB) {
-      external_buffer = AllocateExternalBuffer(&config, format,
-                                               use_external_memory);
-      if (external_buffer == NULL) goto Exit;
-    }
-
-    {
-      Stopwatch stop_watch;
-      if (verbose) StopwatchReset(&stop_watch);
-
-      if (incremental) {
-        status = DecodeWebPIncremental(data, data_size, &config);
-      } else {
-        status = DecodeWebP(data, data_size, &config);
-      }
-      if (verbose) {
-        const double decode_time = StopwatchReadAndReset(&stop_watch);
-        fprintf(stderr, "Time to decode picture: %.3fs\n", decode_time);
-      }
-    }
-
-    ok = (status == VP8_STATUS_OK);
-    if (!ok) {
-      PrintWebPError(in_file, status);
-      goto Exit;
-    }
-  }
-
-  if (out_file != NULL) {
-    if (!quiet) {
-      WFPRINTF(stderr, "Decoded %s.", (const W_CHAR*)in_file);
-      fprintf(stderr, " Dimensions: %d x %d %s. Format: %s. Now saving...\n",
-              output_buffer->width, output_buffer->height,
-              bitstream->has_alpha ? " (with alpha)" : "",
-              kFormatType[bitstream->format]);
-    }
-    ok = SaveOutput(output_buffer, format, out_file);
-  } else {
-    if (!quiet) {
-      WFPRINTF(stderr, "File %s can be decoded ", (const W_CHAR*)in_file);
-      fprintf(stderr, "(dimensions: %d x %d %s. Format: %s).\n",
-              output_buffer->width, output_buffer->height,
-              bitstream->has_alpha ? " (with alpha)" : "",
-              kFormatType[bitstream->format]);
-      fprintf(stderr, "Nothing written; "
-                      "use -o flag to save the result as e.g. PNG.\n");
-    }
-  }
- Exit:
-  WebPFreeDecBuffer(output_buffer);
-  WebPFree((void*)external_buffer);
-  WebPFree((void*)data);
-  FREE_WARGV_AND_RETURN(ok ? 0 : -1);
-}
-
-//------------------------------------------------------------------------------

external/libwebp/libwebp/examples/example_util.c

@@ -1,139 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Utility functions used by the example programs.
-//
-
-#include "./example_util.h"
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "webp/mux_types.h"
-#include "../imageio/imageio_util.h"
-
-//------------------------------------------------------------------------------
-// String parsing
-
-uint32_t ExUtilGetUInt(const char* const v, int base, int* const error) {
-  char* end = NULL;
-  const uint32_t n = (v != NULL) ? (uint32_t)strtoul(v, &end, base) : 0u;
-  if (end == v && error != NULL && !*error) {
-    *error = 1;
-    fprintf(stderr, "Error! '%s' is not an integer.\n",
-            (v != NULL) ? v : "(null)");
-  }
-  return n;
-}
-
-int ExUtilGetInt(const char* const v, int base, int* const error) {
-  return (int)ExUtilGetUInt(v, base, error);
-}
-
-int ExUtilGetInts(const char* v, int base, int max_output, int output[]) {
-  int n, error = 0;
-  for (n = 0; v != NULL && n < max_output; ++n) {
-    const int value = ExUtilGetInt(v, base, &error);
-    if (error) return -1;
-    output[n] = value;
-    v = strchr(v, ',');
-    if (v != NULL) ++v;   // skip over the trailing ','
-  }
-  return n;
-}
-
-float ExUtilGetFloat(const char* const v, int* const error) {
-  char* end = NULL;
-  const float f = (v != NULL) ? (float)strtod(v, &end) : 0.f;
-  if (end == v && error != NULL && !*error) {
-    *error = 1;
-    fprintf(stderr, "Error! '%s' is not a floating point number.\n",
-            (v != NULL) ? v : "(null)");
-  }
-  return f;
-}
-
-//------------------------------------------------------------------------------
-
-static void ResetCommandLineArguments(int argc, const char* argv[],
-                                      CommandLineArguments* const args) {
-  assert(args != NULL);
-  args->argc_ = argc;
-  args->argv_ = argv;
-  args->own_argv_ = 0;
-  WebPDataInit(&args->argv_data_);
-}
-
-void ExUtilDeleteCommandLineArguments(CommandLineArguments* const args) {
-  if (args != NULL) {
-    if (args->own_argv_) {
-      WebPFree((void*)args->argv_);
-      WebPDataClear(&args->argv_data_);
-    }
-    ResetCommandLineArguments(0, NULL, args);
-  }
-}
-
-#define MAX_ARGC 16384
-int ExUtilInitCommandLineArguments(int argc, const char* argv[],
-                                   CommandLineArguments* const args) {
-  if (args == NULL || argv == NULL) return 0;
-  ResetCommandLineArguments(argc, argv, args);
-  if (argc == 1 && argv[0][0] != '-') {
-    char* cur;
-    const char sep[] = " \t\r\n\f\v";
-
-#if defined(_WIN32) && defined(_UNICODE)
-    fprintf(stderr,
-            "Error: Reading arguments from a file is a feature unavailable "
-            "with Unicode binaries.\n");
-    return 0;
-#endif
-
-    if (!ExUtilReadFileToWebPData(argv[0], &args->argv_data_)) {
-      return 0;
-    }
-    args->own_argv_ = 1;
-    args->argv_ = (const char**)WebPMalloc(MAX_ARGC * sizeof(*args->argv_));
-    if (args->argv_ == NULL) {
-      ExUtilDeleteCommandLineArguments(args);
-      return 0;
-    }
-
-    argc = 0;
-    for (cur = strtok((char*)args->argv_data_.bytes, sep);
-         cur != NULL;
-         cur = strtok(NULL, sep)) {
-      if (argc == MAX_ARGC) {
-        fprintf(stderr, "ERROR: Arguments limit %d reached\n", MAX_ARGC);
-        ExUtilDeleteCommandLineArguments(args);
-        return 0;
-      }
-      assert(strlen(cur) != 0);
-      args->argv_[argc++] = cur;
-    }
-    args->argc_ = argc;
-  }
-  return 1;
-}
-
-//------------------------------------------------------------------------------
-
-int ExUtilReadFileToWebPData(const char* const filename,
-                             WebPData* const webp_data) {
-  const uint8_t* data;
-  size_t size;
-  if (webp_data == NULL) return 0;
-  if (!ImgIoUtilReadFile(filename, &data, &size)) return 0;
-  webp_data->bytes = data;
-  webp_data->size = size;
-  return 1;
-}

external/libwebp/libwebp/examples/example_util.h

@@ -1,70 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Utility functions used by the example programs.
-//
-
-#ifndef WEBP_EXAMPLES_EXAMPLE_UTIL_H_
-#define WEBP_EXAMPLES_EXAMPLE_UTIL_H_
-
-#include "webp/types.h"
-#include "webp/mux_types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-//------------------------------------------------------------------------------
-// String parsing
-
-// Parses 'v' using strto(ul|l|d)(). If error is non-NULL, '*error' is set to
-// true on failure while on success it is left unmodified to allow chaining of
-// calls. An error is only printed on the first occurrence.
-uint32_t ExUtilGetUInt(const char* const v, int base, int* const error);
-int ExUtilGetInt(const char* const v, int base, int* const error);
-float ExUtilGetFloat(const char* const v, int* const error);
-
-// This variant of ExUtilGetInt() will parse multiple integers from a
-// comma-separated list. Up to 'max_output' integers are parsed.
-// The result is placed in the output[] array, and the number of integers
-// actually parsed is returned, or -1 if an error occurred.
-int ExUtilGetInts(const char* v, int base, int max_output, int output[]);
-
-// Reads a file named 'filename' into a WebPData structure. The content of
-// webp_data is overwritten. Returns false in case of error.
-int ExUtilReadFileToWebPData(const char* const filename,
-                             WebPData* const webp_data);
-
-//------------------------------------------------------------------------------
-// Command-line arguments
-
-typedef struct {
-  int argc_;
-  const char** argv_;
-  WebPData argv_data_;
-  int own_argv_;
-} CommandLineArguments;
-
-// Initializes the structure from the command-line parameters. If there is
-// only one parameter and it does not start with a '-', then it is assumed to
-// be a file name. This file will be read and tokenized into command-line
-// arguments. The content of 'args' is overwritten.
-// Returns false in case of error (memory allocation failure, non
-// existing file, too many arguments, ...).
-int ExUtilInitCommandLineArguments(int argc, const char* argv[],
-                                   CommandLineArguments* const args);
-
-// Deallocate all memory and reset 'args'.
-void ExUtilDeleteCommandLineArguments(CommandLineArguments* const args);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_EXAMPLES_EXAMPLE_UTIL_H_

external/libwebp/libwebp/examples/gif2webp.c

@@ -1,609 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  simple tool to convert animated GIFs to WebP
-//
-// Authors: Skal (pascal.massimino@gmail.com)
-//          Urvang (urvang@google.com)
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#ifdef WEBP_HAVE_GIF
-
-#if defined(HAVE_UNISTD_H) && HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#include <gif_lib.h>
-#include "webp/encode.h"
-#include "webp/mux.h"
-#include "../examples/example_util.h"
-#include "../imageio/imageio_util.h"
-#include "./gifdec.h"
-#include "./unicode.h"
-#include "./unicode_gif.h"
-
-#if !defined(STDIN_FILENO)
-#define STDIN_FILENO 0
-#endif
-
-//------------------------------------------------------------------------------
-
-static int transparent_index = GIF_INDEX_INVALID;  // Opaque by default.
-
-static const char* const kErrorMessages[-WEBP_MUX_NOT_ENOUGH_DATA + 1] = {
-  "WEBP_MUX_NOT_FOUND", "WEBP_MUX_INVALID_ARGUMENT", "WEBP_MUX_BAD_DATA",
-  "WEBP_MUX_MEMORY_ERROR", "WEBP_MUX_NOT_ENOUGH_DATA"
-};
-
-static const char* ErrorString(WebPMuxError err) {
-  assert(err <= WEBP_MUX_NOT_FOUND && err >= WEBP_MUX_NOT_ENOUGH_DATA);
-  return kErrorMessages[-err];
-}
-
-enum {
-  METADATA_ICC  = (1 << 0),
-  METADATA_XMP  = (1 << 1),
-  METADATA_ALL  = METADATA_ICC | METADATA_XMP
-};
-
-//------------------------------------------------------------------------------
-
-static void Help(void) {
-  printf("Usage:\n");
-  printf(" gif2webp [options] gif_file -o webp_file\n");
-  printf("Options:\n");
-  printf("  -h / -help ............. this help\n");
-  printf("  -lossy ................. encode image using lossy compression\n");
-  printf("  -mixed ................. for each frame in the image, pick lossy\n"
-         "                           or lossless compression heuristically\n");
-  printf("  -q <float> ............. quality factor (0:small..100:big)\n");
-  printf("  -m <int> ............... compression method (0=fast, 6=slowest)\n");
-  printf("  -min_size .............. minimize output size (default:off)\n"
-         "                           lossless compression by default; can be\n"
-         "                           combined with -q, -m, -lossy or -mixed\n"
-         "                           options\n");
-  printf("  -kmin <int> ............ min distance between key frames\n");
-  printf("  -kmax <int> ............ max distance between key frames\n");
-  printf("  -f <int> ............... filter strength (0=off..100)\n");
-  printf("  -metadata <string> ..... comma separated list of metadata to\n");
-  printf("                           ");
-  printf("copy from the input to the output if present\n");
-  printf("                           ");
-  printf("Valid values: all, none, icc, xmp (default)\n");
-  printf("  -loop_compatibility .... use compatibility mode for Chrome\n");
-  printf("                           version prior to M62 (inclusive)\n");
-  printf("  -mt .................... use multi-threading if available\n");
-  printf("\n");
-  printf("  -version ............... print version number and exit\n");
-  printf("  -v ..................... verbose\n");
-  printf("  -quiet ................. don't print anything\n");
-  printf("\n");
-}
-
-//------------------------------------------------------------------------------
-
-int main(int argc, const char* argv[]) {
-  int verbose = 0;
-  int gif_error = GIF_ERROR;
-  WebPMuxError err = WEBP_MUX_OK;
-  int ok = 0;
-  const W_CHAR* in_file = NULL, *out_file = NULL;
-  GifFileType* gif = NULL;
-  int frame_duration = 0;
-  int frame_timestamp = 0;
-  GIFDisposeMethod orig_dispose = GIF_DISPOSE_NONE;
-
-  WebPPicture frame;                // Frame rectangle only (not disposed).
-  WebPPicture curr_canvas;          // Not disposed.
-  WebPPicture prev_canvas;          // Disposed.
-
-  WebPAnimEncoder* enc = NULL;
-  WebPAnimEncoderOptions enc_options;
-  WebPConfig config;
-
-  int frame_number = 0;     // Whether we are processing the first frame.
-  int done;
-  int c;
-  int quiet = 0;
-  WebPData webp_data;
-
-  int keep_metadata = METADATA_XMP;  // ICC not output by default.
-  WebPData icc_data;
-  int stored_icc = 0;         // Whether we have already stored an ICC profile.
-  WebPData xmp_data;
-  int stored_xmp = 0;         // Whether we have already stored an XMP profile.
-  int loop_count = 0;         // default: infinite
-  int stored_loop_count = 0;  // Whether we have found an explicit loop count.
-  int loop_compatibility = 0;
-  WebPMux* mux = NULL;
-
-  int default_kmin = 1;  // Whether to use default kmin value.
-  int default_kmax = 1;
-
-  INIT_WARGV(argc, argv);
-
-  if (!WebPConfigInit(&config) || !WebPAnimEncoderOptionsInit(&enc_options) ||
-      !WebPPictureInit(&frame) || !WebPPictureInit(&curr_canvas) ||
-      !WebPPictureInit(&prev_canvas)) {
-    fprintf(stderr, "Error! Version mismatch!\n");
-    FREE_WARGV_AND_RETURN(-1);
-  }
-  config.lossless = 1;  // Use lossless compression by default.
-
-  WebPDataInit(&webp_data);
-  WebPDataInit(&icc_data);
-  WebPDataInit(&xmp_data);
-
-  if (argc == 1) {
-    Help();
-    FREE_WARGV_AND_RETURN(0);
-  }
-
-  for (c = 1; c < argc; ++c) {
-    int parse_error = 0;
-    if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
-      Help();
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-o") && c < argc - 1) {
-      out_file = GET_WARGV(argv, ++c);
-    } else if (!strcmp(argv[c], "-lossy")) {
-      config.lossless = 0;
-    } else if (!strcmp(argv[c], "-mixed")) {
-      enc_options.allow_mixed = 1;
-      config.lossless = 0;
-    } else if (!strcmp(argv[c], "-loop_compatibility")) {
-      loop_compatibility = 1;
-    } else if (!strcmp(argv[c], "-q") && c < argc - 1) {
-      config.quality = ExUtilGetFloat(argv[++c], &parse_error);
-    } else if (!strcmp(argv[c], "-m") && c < argc - 1) {
-      config.method = ExUtilGetInt(argv[++c], 0, &parse_error);
-    } else if (!strcmp(argv[c], "-min_size")) {
-      enc_options.minimize_size = 1;
-    } else if (!strcmp(argv[c], "-kmax") && c < argc - 1) {
-      enc_options.kmax = ExUtilGetInt(argv[++c], 0, &parse_error);
-      default_kmax = 0;
-    } else if (!strcmp(argv[c], "-kmin") && c < argc - 1) {
-      enc_options.kmin = ExUtilGetInt(argv[++c], 0, &parse_error);
-      default_kmin = 0;
-    } else if (!strcmp(argv[c], "-f") && c < argc - 1) {
-      config.filter_strength = ExUtilGetInt(argv[++c], 0, &parse_error);
-    } else if (!strcmp(argv[c], "-metadata") && c < argc - 1) {
-      static const struct {
-        const char* option;
-        int flag;
-      } kTokens[] = {
-        { "all",  METADATA_ALL },
-        { "none", 0 },
-        { "icc",  METADATA_ICC },
-        { "xmp",  METADATA_XMP },
-      };
-      const size_t kNumTokens = sizeof(kTokens) / sizeof(*kTokens);
-      const char* start = argv[++c];
-      const char* const end = start + strlen(start);
-
-      keep_metadata = 0;
-      while (start < end) {
-        size_t i;
-        const char* token = strchr(start, ',');
-        if (token == NULL) token = end;
-
-        for (i = 0; i < kNumTokens; ++i) {
-          if ((size_t)(token - start) == strlen(kTokens[i].option) &&
-              !strncmp(start, kTokens[i].option, strlen(kTokens[i].option))) {
-            if (kTokens[i].flag != 0) {
-              keep_metadata |= kTokens[i].flag;
-            } else {
-              keep_metadata = 0;
-            }
-            break;
-          }
-        }
-        if (i == kNumTokens) {
-          fprintf(stderr, "Error! Unknown metadata type '%.*s'\n",
-                  (int)(token - start), start);
-          Help();
-          FREE_WARGV_AND_RETURN(-1);
-        }
-        start = token + 1;
-      }
-    } else if (!strcmp(argv[c], "-mt")) {
-      ++config.thread_level;
-    } else if (!strcmp(argv[c], "-version")) {
-      const int enc_version = WebPGetEncoderVersion();
-      const int mux_version = WebPGetMuxVersion();
-      printf("WebP Encoder version: %d.%d.%d\nWebP Mux version: %d.%d.%d\n",
-             (enc_version >> 16) & 0xff, (enc_version >> 8) & 0xff,
-             enc_version & 0xff, (mux_version >> 16) & 0xff,
-             (mux_version >> 8) & 0xff, mux_version & 0xff);
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-quiet")) {
-      quiet = 1;
-      enc_options.verbose = 0;
-    } else if (!strcmp(argv[c], "-v")) {
-      verbose = 1;
-      enc_options.verbose = 1;
-    } else if (!strcmp(argv[c], "--")) {
-      if (c < argc - 1) in_file = GET_WARGV(argv, ++c);
-      break;
-    } else if (argv[c][0] == '-') {
-      fprintf(stderr, "Error! Unknown option '%s'\n", argv[c]);
-      Help();
-      FREE_WARGV_AND_RETURN(-1);
-    } else {
-      in_file = GET_WARGV(argv, c);
-    }
-
-    if (parse_error) {
-      Help();
-      FREE_WARGV_AND_RETURN(-1);
-    }
-  }
-
-  // Appropriate default kmin, kmax values for lossy and lossless.
-  if (default_kmin) {
-    enc_options.kmin = config.lossless ? 9 : 3;
-  }
-  if (default_kmax) {
-    enc_options.kmax = config.lossless ? 17 : 5;
-  }
-
-  if (!WebPValidateConfig(&config)) {
-    fprintf(stderr, "Error! Invalid configuration.\n");
-    goto End;
-  }
-
-  if (in_file == NULL) {
-    fprintf(stderr, "No input file specified!\n");
-    Help();
-    goto End;
-  }
-
-  // Start the decoder object
-  gif = DGifOpenFileUnicode(in_file, &gif_error);
-  if (gif == NULL) goto End;
-
-  // Loop over GIF images
-  done = 0;
-  do {
-    GifRecordType type;
-    if (DGifGetRecordType(gif, &type) == GIF_ERROR) goto End;
-
-    switch (type) {
-      case IMAGE_DESC_RECORD_TYPE: {
-        GIFFrameRect gif_rect;
-        GifImageDesc* const image_desc = &gif->Image;
-
-        if (!DGifGetImageDesc(gif)) goto End;
-
-        if (frame_number == 0) {
-          if (verbose) {
-            printf("Canvas screen: %d x %d\n", gif->SWidth, gif->SHeight);
-          }
-          // Fix some broken GIF global headers that report
-          // 0 x 0 screen dimension.
-          if (gif->SWidth == 0 || gif->SHeight == 0) {
-            image_desc->Left = 0;
-            image_desc->Top = 0;
-            gif->SWidth = image_desc->Width;
-            gif->SHeight = image_desc->Height;
-            if (gif->SWidth <= 0 || gif->SHeight <= 0) {
-              goto End;
-            }
-            if (verbose) {
-              printf("Fixed canvas screen dimension to: %d x %d\n",
-                     gif->SWidth, gif->SHeight);
-            }
-          }
-          // Allocate current buffer.
-          frame.width = gif->SWidth;
-          frame.height = gif->SHeight;
-          frame.use_argb = 1;
-          if (!WebPPictureAlloc(&frame)) goto End;
-          GIFClearPic(&frame, NULL);
-          if (!(WebPPictureCopy(&frame, &curr_canvas) &&
-                WebPPictureCopy(&frame, &prev_canvas))) {
-            fprintf(stderr, "Error allocating canvas.\n");
-            goto End;
-          }
-
-          // Background color.
-          GIFGetBackgroundColor(gif->SColorMap, gif->SBackGroundColor,
-                                transparent_index,
-                                &enc_options.anim_params.bgcolor);
-
-          // Initialize encoder.
-          enc = WebPAnimEncoderNew(curr_canvas.width, curr_canvas.height,
-                                   &enc_options);
-          if (enc == NULL) {
-            fprintf(stderr,
-                    "Error! Could not create encoder object. Possibly due to "
-                    "a memory error.\n");
-            goto End;
-          }
-        }
-
-        // Some even more broken GIF can have sub-rect with zero width/height.
-        if (image_desc->Width == 0 || image_desc->Height == 0) {
-          image_desc->Width = gif->SWidth;
-          image_desc->Height = gif->SHeight;
-        }
-
-        if (!GIFReadFrame(gif, transparent_index, &gif_rect, &frame)) {
-          goto End;
-        }
-        // Blend frame rectangle with previous canvas to compose full canvas.
-        // Note that 'curr_canvas' is same as 'prev_canvas' at this point.
-        GIFBlendFrames(&frame, &gif_rect, &curr_canvas);
-
-        if (!WebPAnimEncoderAdd(enc, &curr_canvas, frame_timestamp, &config)) {
-          fprintf(stderr, "Error while adding frame #%d: %s\n", frame_number,
-                  WebPAnimEncoderGetError(enc));
-          goto End;
-        } else {
-          ++frame_number;
-        }
-
-        // Update canvases.
-        GIFDisposeFrame(orig_dispose, &gif_rect, &prev_canvas, &curr_canvas);
-        GIFCopyPixels(&curr_canvas, &prev_canvas);
-
-        // Force frames with a small or no duration to 100ms to be consistent
-        // with web browsers and other transcoding tools. This also avoids
-        // incorrect durations between frames when padding frames are
-        // discarded.
-        if (frame_duration <= 10) {
-          frame_duration = 100;
-        }
-
-        // Update timestamp (for next frame).
-        frame_timestamp += frame_duration;
-
-        // In GIF, graphic control extensions are optional for a frame, so we
-        // may not get one before reading the next frame. To handle this case,
-        // we reset frame properties to reasonable defaults for the next frame.
-        orig_dispose = GIF_DISPOSE_NONE;
-        frame_duration = 0;
-        transparent_index = GIF_INDEX_INVALID;
-        break;
-      }
-      case EXTENSION_RECORD_TYPE: {
-        int extension;
-        GifByteType* data = NULL;
-        if (DGifGetExtension(gif, &extension, &data) == GIF_ERROR) {
-          goto End;
-        }
-        if (data == NULL) continue;
-
-        switch (extension) {
-          case COMMENT_EXT_FUNC_CODE: {
-            break;  // Do nothing for now.
-          }
-          case GRAPHICS_EXT_FUNC_CODE: {
-            if (!GIFReadGraphicsExtension(data, &frame_duration, &orig_dispose,
-                                          &transparent_index)) {
-              goto End;
-            }
-            break;
-          }
-          case PLAINTEXT_EXT_FUNC_CODE: {
-            break;
-          }
-          case APPLICATION_EXT_FUNC_CODE: {
-            if (data[0] != 11) break;    // Chunk is too short
-            if (!memcmp(data + 1, "NETSCAPE2.0", 11) ||
-                !memcmp(data + 1, "ANIMEXTS1.0", 11)) {
-              if (!GIFReadLoopCount(gif, &data, &loop_count)) {
-                goto End;
-              }
-              if (verbose) {
-                fprintf(stderr, "Loop count: %d\n", loop_count);
-              }
-              stored_loop_count = loop_compatibility ? (loop_count != 0) : 1;
-            } else {  // An extension containing metadata.
-              // We only store the first encountered chunk of each type, and
-              // only if requested by the user.
-              const int is_xmp = (keep_metadata & METADATA_XMP) &&
-                                 !stored_xmp &&
-                                 !memcmp(data + 1, "XMP DataXMP", 11);
-              const int is_icc = (keep_metadata & METADATA_ICC) &&
-                                 !stored_icc &&
-                                 !memcmp(data + 1, "ICCRGBG1012", 11);
-              if (is_xmp || is_icc) {
-                if (!GIFReadMetadata(gif, &data,
-                                     is_xmp ? &xmp_data : &icc_data)) {
-                  goto End;
-                }
-                if (is_icc) {
-                  stored_icc = 1;
-                } else if (is_xmp) {
-                  stored_xmp = 1;
-                }
-              }
-            }
-            break;
-          }
-          default: {
-            break;  // skip
-          }
-        }
-        while (data != NULL) {
-          if (DGifGetExtensionNext(gif, &data) == GIF_ERROR) goto End;
-        }
-        break;
-      }
-      case TERMINATE_RECORD_TYPE: {
-        done = 1;
-        break;
-      }
-      default: {
-        if (verbose) {
-          fprintf(stderr, "Skipping over unknown record type %d\n", type);
-        }
-        break;
-      }
-    }
-  } while (!done);
-
-  // Last NULL frame.
-  if (!WebPAnimEncoderAdd(enc, NULL, frame_timestamp, NULL)) {
-    fprintf(stderr, "Error flushing WebP muxer.\n");
-    fprintf(stderr, "%s\n", WebPAnimEncoderGetError(enc));
-  }
-
-  if (!WebPAnimEncoderAssemble(enc, &webp_data)) {
-    fprintf(stderr, "%s\n", WebPAnimEncoderGetError(enc));
-    goto End;
-  }
-  // If there's only one frame, we don't need to handle loop count.
-  if (frame_number == 1) {
-    loop_count = 0;
-  } else if (!loop_compatibility) {
-    if (!stored_loop_count) {
-      // if no loop-count element is seen, the default is '1' (loop-once)
-      // and we need to signal it explicitly in WebP. Note however that
-      // in case there's a single frame, we still don't need to store it.
-      if (frame_number > 1) {
-        stored_loop_count = 1;
-        loop_count = 1;
-      }
-    } else if (loop_count > 0 && loop_count < 65535) {
-      // adapt GIF's semantic to WebP's (except in the infinite-loop case)
-      loop_count += 1;
-    }
-  }
-  // loop_count of 0 is the default (infinite), so no need to signal it
-  if (loop_count == 0) stored_loop_count = 0;
-
-  if (stored_loop_count || stored_icc || stored_xmp) {
-    // Re-mux to add loop count and/or metadata as needed.
-    mux = WebPMuxCreate(&webp_data, 1);
-    if (mux == NULL) {
-      fprintf(stderr, "ERROR: Could not re-mux to add loop count/metadata.\n");
-      goto End;
-    }
-    WebPDataClear(&webp_data);
-
-    if (stored_loop_count) {  // Update loop count.
-      WebPMuxAnimParams new_params;
-      err = WebPMuxGetAnimationParams(mux, &new_params);
-      if (err != WEBP_MUX_OK) {
-        fprintf(stderr, "ERROR (%s): Could not fetch loop count.\n",
-                ErrorString(err));
-        goto End;
-      }
-      new_params.loop_count = loop_count;
-      err = WebPMuxSetAnimationParams(mux, &new_params);
-      if (err != WEBP_MUX_OK) {
-        fprintf(stderr, "ERROR (%s): Could not update loop count.\n",
-                ErrorString(err));
-        goto End;
-      }
-    }
-
-    if (stored_icc) {   // Add ICCP chunk.
-      err = WebPMuxSetChunk(mux, "ICCP", &icc_data, 1);
-      if (verbose) {
-        fprintf(stderr, "ICC size: %d\n", (int)icc_data.size);
-      }
-      if (err != WEBP_MUX_OK) {
-        fprintf(stderr, "ERROR (%s): Could not set ICC chunk.\n",
-                ErrorString(err));
-        goto End;
-      }
-    }
-
-    if (stored_xmp) {   // Add XMP chunk.
-      err = WebPMuxSetChunk(mux, "XMP ", &xmp_data, 1);
-      if (verbose) {
-        fprintf(stderr, "XMP size: %d\n", (int)xmp_data.size);
-      }
-      if (err != WEBP_MUX_OK) {
-        fprintf(stderr, "ERROR (%s): Could not set XMP chunk.\n",
-                ErrorString(err));
-        goto End;
-      }
-    }
-
-    err = WebPMuxAssemble(mux, &webp_data);
-    if (err != WEBP_MUX_OK) {
-      fprintf(stderr, "ERROR (%s): Could not assemble when re-muxing to add "
-              "loop count/metadata.\n", ErrorString(err));
-      goto End;
-    }
-  }
-
-  if (out_file != NULL) {
-    if (!ImgIoUtilWriteFile((const char*)out_file, webp_data.bytes,
-                            webp_data.size)) {
-      WFPRINTF(stderr, "Error writing output file: %s\n", out_file);
-      goto End;
-    }
-    if (!quiet) {
-      if (!WSTRCMP(out_file, "-")) {
-        fprintf(stderr, "Saved %d bytes to STDIO\n",
-                (int)webp_data.size);
-      } else {
-        WFPRINTF(stderr, "Saved output file (%d bytes): %s\n",
-                 (int)webp_data.size, out_file);
-      }
-    }
-  } else {
-    if (!quiet) {
-      fprintf(stderr, "Nothing written; use -o flag to save the result "
-                      "(%d bytes).\n", (int)webp_data.size);
-    }
-  }
-
-  // All OK.
-  ok = 1;
-  gif_error = GIF_OK;
-
- End:
-  WebPDataClear(&icc_data);
-  WebPDataClear(&xmp_data);
-  WebPMuxDelete(mux);
-  WebPDataClear(&webp_data);
-  WebPPictureFree(&frame);
-  WebPPictureFree(&curr_canvas);
-  WebPPictureFree(&prev_canvas);
-  WebPAnimEncoderDelete(enc);
-
-  if (gif_error != GIF_OK) {
-    GIFDisplayError(gif, gif_error);
-  }
-  if (gif != NULL) {
-#if LOCAL_GIF_PREREQ(5,1)
-    DGifCloseFile(gif, &gif_error);
-#else
-    DGifCloseFile(gif);
-#endif
-  }
-
-  FREE_WARGV_AND_RETURN(!ok);
-}
-
-#else  // !WEBP_HAVE_GIF
-
-int main(int argc, const char* argv[]) {
-  fprintf(stderr, "GIF support not enabled in %s.\n", argv[0]);
-  (void)argc;
-  return 0;
-}
-
-#endif
-
-//------------------------------------------------------------------------------

external/libwebp/libwebp/examples/gifdec.c

@@ -1,416 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// GIF decode.
-
-#include "./gifdec.h"
-
-#include <stdio.h>
-
-#ifdef WEBP_HAVE_GIF
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "webp/encode.h"
-#include "webp/mux_types.h"
-
-#define GIF_TRANSPARENT_COLOR 0x00000000u
-#define GIF_WHITE_COLOR       0xffffffffu
-#define GIF_TRANSPARENT_MASK  0x01
-#define GIF_DISPOSE_MASK      0x07
-#define GIF_DISPOSE_SHIFT     2
-
-// from utils/utils.h
-#ifdef __cplusplus
-extern "C" {
-#endif
-extern void WebPCopyPlane(const uint8_t* src, int src_stride,
-                          uint8_t* dst, int dst_stride,
-                          int width, int height);
-extern void WebPCopyPixels(const WebPPicture* const src,
-                           WebPPicture* const dst);
-#ifdef __cplusplus
-}
-#endif
-
-void GIFGetBackgroundColor(const ColorMapObject* const color_map,
-                           int bgcolor_index, int transparent_index,
-                           uint32_t* const bgcolor) {
-  if (transparent_index != GIF_INDEX_INVALID &&
-      bgcolor_index == transparent_index) {
-    *bgcolor = GIF_TRANSPARENT_COLOR;  // Special case.
-  } else if (color_map == NULL || color_map->Colors == NULL
-             || bgcolor_index >= color_map->ColorCount) {
-    *bgcolor = GIF_WHITE_COLOR;
-    fprintf(stderr,
-            "GIF decode warning: invalid background color index. Assuming "
-            "white background.\n");
-  } else {
-    const GifColorType color = color_map->Colors[bgcolor_index];
-    *bgcolor = (0xffu       << 24)
-             | (color.Red   << 16)
-             | (color.Green <<  8)
-             | (color.Blue  <<  0);
-  }
-}
-
-int GIFReadGraphicsExtension(const GifByteType* const buf, int* const duration,
-                             GIFDisposeMethod* const dispose,
-                             int* const transparent_index) {
-  const int flags = buf[1];
-  const int dispose_raw = (flags >> GIF_DISPOSE_SHIFT) & GIF_DISPOSE_MASK;
-  const int duration_raw = buf[2] | (buf[3] << 8);  // In 10 ms units.
-  if (buf[0] != 4) return 0;
-  *duration = duration_raw * 10;  // Duration is in 1 ms units.
-  switch (dispose_raw) {
-    case 3:
-      *dispose = GIF_DISPOSE_RESTORE_PREVIOUS;
-      break;
-    case 2:
-      *dispose = GIF_DISPOSE_BACKGROUND;
-      break;
-    case 1:
-    case 0:
-    default:
-      *dispose = GIF_DISPOSE_NONE;
-      break;
-  }
-  *transparent_index =
-      (flags & GIF_TRANSPARENT_MASK) ? buf[4] : GIF_INDEX_INVALID;
-  return 1;
-}
-
-static int Remap(const GifFileType* const gif, const uint8_t* const src,
-                 int len, int transparent_index, uint32_t* dst) {
-  int i;
-  const GifColorType* colors;
-  const ColorMapObject* const cmap =
-      gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap;
-  if (cmap == NULL) return 1;
-  if (cmap->Colors == NULL || cmap->ColorCount <= 0) return 0;
-  colors = cmap->Colors;
-
-  for (i = 0; i < len; ++i) {
-    if (src[i] == transparent_index) {
-      dst[i] = GIF_TRANSPARENT_COLOR;
-    } else if (src[i] < cmap->ColorCount) {
-      const GifColorType c = colors[src[i]];
-      dst[i] = c.Blue | (c.Green << 8) | (c.Red << 16) | (0xffu << 24);
-    } else {
-      return 0;
-    }
-  }
-  return 1;
-}
-
-int GIFReadFrame(GifFileType* const gif, int transparent_index,
-                 GIFFrameRect* const gif_rect, WebPPicture* const picture) {
-  WebPPicture sub_image;
-  const GifImageDesc* const image_desc = &gif->Image;
-  uint32_t* dst = NULL;
-  uint8_t* tmp = NULL;
-  const GIFFrameRect rect = {
-      image_desc->Left, image_desc->Top, image_desc->Width, image_desc->Height
-  };
-  const uint64_t memory_needed = 4 * rect.width * (uint64_t)rect.height;
-  int ok = 0;
-  *gif_rect = rect;
-
-  if (memory_needed != (size_t)memory_needed || memory_needed > (4ULL << 32)) {
-    fprintf(stderr, "Image is too large (%d x %d).", rect.width, rect.height);
-    return 0;
-  }
-
-  // Use a view for the sub-picture:
-  if (!WebPPictureView(picture, rect.x_offset, rect.y_offset,
-                       rect.width, rect.height, &sub_image)) {
-    fprintf(stderr, "Sub-image %dx%d at position %d,%d is invalid!\n",
-            rect.width, rect.height, rect.x_offset, rect.y_offset);
-    return 0;
-  }
-  dst = sub_image.argb;
-
-  tmp = (uint8_t*)WebPMalloc(rect.width * sizeof(*tmp));
-  if (tmp == NULL) goto End;
-
-  if (image_desc->Interlace) {  // Interlaced image.
-    // We need 4 passes, with the following offsets and jumps.
-    const int interlace_offsets[] = { 0, 4, 2, 1 };
-    const int interlace_jumps[]   = { 8, 8, 4, 2 };
-    int pass;
-    for (pass = 0; pass < 4; ++pass) {
-      const size_t stride = (size_t)sub_image.argb_stride;
-      int y = interlace_offsets[pass];
-      uint32_t* row = dst + y * stride;
-      const size_t jump = interlace_jumps[pass] * stride;
-      for (; y < rect.height; y += interlace_jumps[pass], row += jump) {
-        if (DGifGetLine(gif, tmp, rect.width) == GIF_ERROR) goto End;
-        if (!Remap(gif, tmp, rect.width, transparent_index, row)) goto End;
-      }
-    }
-  } else {  // Non-interlaced image.
-    int y;
-    uint32_t* ptr = dst;
-    for (y = 0; y < rect.height; ++y, ptr += sub_image.argb_stride) {
-      if (DGifGetLine(gif, tmp, rect.width) == GIF_ERROR) goto End;
-      if (!Remap(gif, tmp, rect.width, transparent_index, ptr)) goto End;
-    }
-  }
-  ok = 1;
-
- End:
-  if (!ok) picture->error_code = sub_image.error_code;
-  WebPPictureFree(&sub_image);
-  WebPFree(tmp);
-  return ok;
-}
-
-int GIFReadLoopCount(GifFileType* const gif, GifByteType** const buf,
-                     int* const loop_count) {
-  assert(!memcmp(*buf + 1, "NETSCAPE2.0", 11) ||
-         !memcmp(*buf + 1, "ANIMEXTS1.0", 11));
-  if (DGifGetExtensionNext(gif, buf) == GIF_ERROR) {
-    return 0;
-  }
-  if (*buf == NULL) {
-    return 0;  // Loop count sub-block missing.
-  }
-  if ((*buf)[0] < 3 || (*buf)[1] != 1) {
-    return 0;   // wrong size/marker
-  }
-  *loop_count = (*buf)[2] | ((*buf)[3] << 8);
-  return 1;
-}
-
-int GIFReadMetadata(GifFileType* const gif, GifByteType** const buf,
-                    WebPData* const metadata) {
-  const int is_xmp = !memcmp(*buf + 1, "XMP DataXMP", 11);
-  const int is_icc = !memcmp(*buf + 1, "ICCRGBG1012", 11);
-  assert(is_xmp || is_icc);
-  (void)is_icc;  // silence unused warning.
-  // Construct metadata from sub-blocks.
-  // Usual case (including ICC profile): In each sub-block, the
-  // first byte specifies its size in bytes (0 to 255) and the
-  // rest of the bytes contain the data.
-  // Special case for XMP data: In each sub-block, the first byte
-  // is also part of the XMP payload. XMP in GIF also has a 257
-  // byte padding data. See the XMP specification for details.
-  while (1) {
-    WebPData subblock;
-    const uint8_t* tmp;
-    if (DGifGetExtensionNext(gif, buf) == GIF_ERROR) {
-      return 0;
-    }
-    if (*buf == NULL) break;  // Finished.
-    subblock.size = is_xmp ? (*buf)[0] + 1 : (*buf)[0];
-    assert(subblock.size > 0);
-    subblock.bytes = is_xmp ? *buf : *buf + 1;
-    // Note: We store returned value in 'tmp' first, to avoid
-    // leaking old memory in metadata->bytes on error.
-    tmp = (uint8_t*)realloc((void*)metadata->bytes,
-                            metadata->size + subblock.size);
-    if (tmp == NULL) {
-      return 0;
-    }
-    memcpy((void*)(tmp + metadata->size),
-           subblock.bytes, subblock.size);
-    metadata->bytes = tmp;
-    metadata->size += subblock.size;
-  }
-  if (is_xmp) {
-    // XMP padding data is 0x01, 0xff, 0xfe ... 0x01, 0x00.
-    const size_t xmp_pading_size = 257;
-    if (metadata->size > xmp_pading_size) {
-      metadata->size -= xmp_pading_size;
-    }
-  }
-  return 1;
-}
-
-static void ClearRectangle(WebPPicture* const picture,
-                           int left, int top, int width, int height) {
-  int i, j;
-  const size_t stride = picture->argb_stride;
-  uint32_t* dst = picture->argb + top * stride + left;
-  for (j = 0; j < height; ++j, dst += stride) {
-    for (i = 0; i < width; ++i) dst[i] = GIF_TRANSPARENT_COLOR;
-  }
-}
-
-void GIFClearPic(WebPPicture* const pic, const GIFFrameRect* const rect) {
-  if (rect != NULL) {
-    ClearRectangle(pic, rect->x_offset, rect->y_offset,
-                   rect->width, rect->height);
-  } else {
-    ClearRectangle(pic, 0, 0, pic->width, pic->height);
-  }
-}
-
-void GIFCopyPixels(const WebPPicture* const src, WebPPicture* const dst) {
-  WebPCopyPixels(src, dst);
-}
-
-void GIFDisposeFrame(GIFDisposeMethod dispose, const GIFFrameRect* const rect,
-                     const WebPPicture* const prev_canvas,
-                     WebPPicture* const curr_canvas) {
-  assert(rect != NULL);
-  if (dispose == GIF_DISPOSE_BACKGROUND) {
-    GIFClearPic(curr_canvas, rect);
-  } else if (dispose == GIF_DISPOSE_RESTORE_PREVIOUS) {
-    const size_t src_stride = prev_canvas->argb_stride;
-    const uint32_t* const src = prev_canvas->argb + rect->x_offset
-                              + rect->y_offset * src_stride;
-    const size_t dst_stride = curr_canvas->argb_stride;
-    uint32_t* const dst = curr_canvas->argb + rect->x_offset
-                        + rect->y_offset * dst_stride;
-    assert(prev_canvas != NULL);
-    WebPCopyPlane((uint8_t*)src, (int)(4 * src_stride),
-                  (uint8_t*)dst, (int)(4 * dst_stride),
-                  4 * rect->width, rect->height);
-  }
-}
-
-void GIFBlendFrames(const WebPPicture* const src,
-                    const GIFFrameRect* const rect, WebPPicture* const dst) {
-  int i, j;
-  const size_t src_stride = src->argb_stride;
-  const size_t dst_stride = dst->argb_stride;
-  assert(src->width == dst->width && src->height == dst->height);
-  for (j = rect->y_offset; j < rect->y_offset + rect->height; ++j) {
-    for (i = rect->x_offset; i < rect->x_offset + rect->width; ++i) {
-      const uint32_t src_pixel = src->argb[j * src_stride + i];
-      const int src_alpha = src_pixel >> 24;
-      if (src_alpha != 0) {
-        dst->argb[j * dst_stride + i] = src_pixel;
-      }
-    }
-  }
-}
-
-void GIFDisplayError(const GifFileType* const gif, int gif_error) {
-  // libgif 4.2.0 has retired PrintGifError() and added GifErrorString().
-#if LOCAL_GIF_PREREQ(4,2)
-#if LOCAL_GIF_PREREQ(5,0)
-  // Static string actually, hence the const char* cast.
-  const char* error_str = (const char*)GifErrorString(
-      (gif == NULL) ? gif_error : gif->Error);
-#else
-  const char* error_str = (const char*)GifErrorString();
-  (void)gif;
-#endif
-  if (error_str == NULL) error_str = "Unknown error";
-  fprintf(stderr, "GIFLib Error %d: %s\n", gif_error, error_str);
-#else
-  (void)gif;
-  fprintf(stderr, "GIFLib Error %d: ", gif_error);
-  PrintGifError();
-  fprintf(stderr, "\n");
-#endif
-}
-
-#else  // !WEBP_HAVE_GIF
-
-static void ErrorGIFNotAvailable() {
-  fprintf(stderr, "GIF support not compiled. Please install the libgif-dev "
-          "package before building.\n");
-}
-
-void GIFGetBackgroundColor(const struct ColorMapObject* const color_map,
-                           int bgcolor_index, int transparent_index,
-                           uint32_t* const bgcolor) {
-  (void)color_map;
-  (void)bgcolor_index;
-  (void)transparent_index;
-  (void)bgcolor;
-  ErrorGIFNotAvailable();
-}
-
-int GIFReadGraphicsExtension(const GifByteType* const data, int* const duration,
-                             GIFDisposeMethod* const dispose,
-                             int* const transparent_index) {
-  (void)data;
-  (void)duration;
-  (void)dispose;
-  (void)transparent_index;
-  ErrorGIFNotAvailable();
-  return 0;
-}
-
-int GIFReadFrame(struct GifFileType* const gif, int transparent_index,
-                 GIFFrameRect* const gif_rect,
-                 struct WebPPicture* const picture) {
-  (void)gif;
-  (void)transparent_index;
-  (void)gif_rect;
-  (void)picture;
-  ErrorGIFNotAvailable();
-  return 0;
-}
-
-int GIFReadLoopCount(struct GifFileType* const gif, GifByteType** const buf,
-                     int* const loop_count) {
-  (void)gif;
-  (void)buf;
-  (void)loop_count;
-  ErrorGIFNotAvailable();
-  return 0;
-}
-
-int GIFReadMetadata(struct GifFileType* const gif, GifByteType** const buf,
-                    struct WebPData* const metadata) {
-  (void)gif;
-  (void)buf;
-  (void)metadata;
-  ErrorGIFNotAvailable();
-  return 0;
-}
-
-void GIFDisposeFrame(GIFDisposeMethod dispose, const GIFFrameRect* const rect,
-                     const struct WebPPicture* const prev_canvas,
-                     struct WebPPicture* const curr_canvas) {
-  (void)dispose;
-  (void)rect;
-  (void)prev_canvas;
-  (void)curr_canvas;
-  ErrorGIFNotAvailable();
-}
-
-void GIFBlendFrames(const struct WebPPicture* const src,
-                    const GIFFrameRect* const rect,
-                    struct WebPPicture* const dst) {
-  (void)src;
-  (void)rect;
-  (void)dst;
-  ErrorGIFNotAvailable();
-}
-
-void GIFDisplayError(const struct GifFileType* const gif, int gif_error) {
-  (void)gif;
-  (void)gif_error;
-  ErrorGIFNotAvailable();
-}
-
-void GIFClearPic(struct WebPPicture* const pic,
-                 const GIFFrameRect* const rect) {
-  (void)pic;
-  (void)rect;
-  ErrorGIFNotAvailable();
-}
-
-void GIFCopyPixels(const struct WebPPicture* const src,
-                   struct WebPPicture* const dst) {
-  (void)src;
-  (void)dst;
-  ErrorGIFNotAvailable();
-}
-
-#endif  // WEBP_HAVE_GIF
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/examples/gifdec.h

@@ -1,116 +0,0 @@
-// Copyright 2014 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// GIF decode.
-
-#ifndef WEBP_EXAMPLES_GIFDEC_H_
-#define WEBP_EXAMPLES_GIFDEC_H_
-
-#include <stdio.h>
-#include "webp/types.h"
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#ifdef WEBP_HAVE_GIF
-#include <gif_lib.h>
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// GIFLIB_MAJOR is only defined in libgif >= 4.2.0.
-#if defined(GIFLIB_MAJOR) && defined(GIFLIB_MINOR)
-# define LOCAL_GIF_VERSION ((GIFLIB_MAJOR << 8) | GIFLIB_MINOR)
-# define LOCAL_GIF_PREREQ(maj, min) \
-    (LOCAL_GIF_VERSION >= (((maj) << 8) | (min)))
-#else
-# define LOCAL_GIF_VERSION 0
-# define LOCAL_GIF_PREREQ(maj, min) 0
-#endif
-
-#define GIF_INDEX_INVALID (-1)
-
-typedef enum GIFDisposeMethod {
-  GIF_DISPOSE_NONE,
-  GIF_DISPOSE_BACKGROUND,
-  GIF_DISPOSE_RESTORE_PREVIOUS
-} GIFDisposeMethod;
-
-typedef struct {
-  int x_offset, y_offset, width, height;
-} GIFFrameRect;
-
-struct WebPData;
-struct WebPPicture;
-
-#ifndef WEBP_HAVE_GIF
-struct ColorMapObject;
-struct GifFileType;
-typedef unsigned char GifByteType;
-#endif
-
-// Given the index of background color and transparent color, returns the
-// corresponding background color (in BGRA format) in 'bgcolor'.
-void GIFGetBackgroundColor(const struct ColorMapObject* const color_map,
-                           int bgcolor_index, int transparent_index,
-                           uint32_t* const bgcolor);
-
-// Parses the given graphics extension data to get frame duration (in 1ms
-// units), dispose method and transparent color index.
-// Returns true on success.
-int GIFReadGraphicsExtension(const GifByteType* const buf, int* const duration,
-                             GIFDisposeMethod* const dispose,
-                             int* const transparent_index);
-
-// Reads the next GIF frame from 'gif' into 'picture'. Also, returns the GIF
-// frame dimensions and offsets in 'rect'.
-// Returns true on success.
-int GIFReadFrame(struct GifFileType* const gif, int transparent_index,
-                 GIFFrameRect* const gif_rect,
-                 struct WebPPicture* const picture);
-
-// Parses loop count from the given Netscape extension data.
-int GIFReadLoopCount(struct GifFileType* const gif, GifByteType** const buf,
-                     int* const loop_count);
-
-// Parses the given ICC or XMP extension data and stores it into 'metadata'.
-// Returns true on success.
-int GIFReadMetadata(struct GifFileType* const gif, GifByteType** const buf,
-                    struct WebPData* const metadata);
-
-// Dispose the pixels within 'rect' of 'curr_canvas' based on 'dispose' method
-// and 'prev_canvas'.
-void GIFDisposeFrame(GIFDisposeMethod dispose, const GIFFrameRect* const rect,
-                     const struct WebPPicture* const prev_canvas,
-                     struct WebPPicture* const curr_canvas);
-
-// Given 'src' picture and its frame rectangle 'rect', blend it into 'dst'.
-void GIFBlendFrames(const struct WebPPicture* const src,
-                    const GIFFrameRect* const rect,
-                    struct WebPPicture* const dst);
-
-// Prints an error string based on 'gif_error'.
-void GIFDisplayError(const struct GifFileType* const gif, int gif_error);
-
-// In the given 'pic', clear the pixels in 'rect' to transparent color.
-void GIFClearPic(struct WebPPicture* const pic, const GIFFrameRect* const rect);
-
-// Copy pixels from 'src' to 'dst' honoring strides. 'src' and 'dst' are assumed
-// to be already allocated.
-void GIFCopyPixels(const struct WebPPicture* const src,
-                   struct WebPPicture* const dst);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_EXAMPLES_GIFDEC_H_

external/libwebp/libwebp/examples/img2webp.c

@@ -1,339 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  generate an animated WebP out of a sequence of images
-//  (PNG, JPEG, ...)
-//
-//  Example usage:
-//     img2webp -o out.webp -q 40 -mixed -duration 40 input??.png
-//
-// Author: skal@google.com (Pascal Massimino)
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include "../examples/example_util.h"
-#include "../imageio/image_dec.h"
-#include "../imageio/imageio_util.h"
-#include "./stopwatch.h"
-#include "./unicode.h"
-#include "sharpyuv/sharpyuv.h"
-#include "webp/encode.h"
-#include "webp/mux.h"
-
-//------------------------------------------------------------------------------
-
-static void Help(void) {
-  printf("Usage:\n\n");
-  printf("  img2webp [file_options] [[frame_options] frame_file]...");
-  printf(" [-o webp_file]\n\n");
-
-  printf("File-level options (only used at the start of compression):\n");
-  printf(" -min_size ............ minimize size\n");
-  printf(" -kmax <int> .......... maximum number of frame between key-frames\n"
-         "                        (0=only keyframes)\n");
-  printf(" -kmin <int> .......... minimum number of frame between key-frames\n"
-         "                        (0=disable key-frames altogether)\n");
-  printf(" -mixed ............... use mixed lossy/lossless automatic mode\n");
-  printf(" -near_lossless <int> . use near-lossless image preprocessing\n"
-         "                        (0..100=off), default=100\n");
-  printf(" -sharp_yuv ........... use sharper (and slower) RGB->YUV "
-                                  "conversion\n                        "
-                                  "(lossy only)\n");
-  printf(" -loop <int> .......... loop count (default: 0, = infinite loop)\n");
-  printf(" -v ................... verbose mode\n");
-  printf(" -h ................... this help\n");
-  printf(" -version ............. print version number and exit\n");
-  printf("\n");
-
-  printf("Per-frame options (only used for subsequent images input):\n");
-  printf(" -d <int> ............. frame duration in ms (default: 100)\n");
-  printf(" -lossless  ........... use lossless mode (default)\n");
-  printf(" -lossy ... ........... use lossy mode\n");
-  printf(" -q <float> ........... quality\n");
-  printf(" -m <int> ............. method to use\n");
-
-  printf("\n");
-  printf("example: img2webp -loop 2 in0.png -lossy in1.jpg\n"
-         "                  -d 80 in2.tiff -o out.webp\n");
-  printf("\nNote: if a single file name is passed as the argument, the "
-         "arguments will be\n");
-  printf("tokenized from this file. The file name must not start with "
-         "the character '-'.\n");
-  printf("\nSupported input formats:\n  %s\n",
-         WebPGetEnabledInputFileFormats());
-}
-
-//------------------------------------------------------------------------------
-
-static int ReadImage(const char filename[], WebPPicture* const pic) {
-  const uint8_t* data = NULL;
-  size_t data_size = 0;
-  WebPImageReader reader;
-  int ok;
-#ifdef HAVE_WINCODEC_H
-  // Try to decode the file using WIC falling back to the other readers for
-  // e.g., WebP.
-  ok = ReadPictureWithWIC(filename, pic, 1, NULL);
-  if (ok) return 1;
-#endif
-  if (!ImgIoUtilReadFile(filename, &data, &data_size)) return 0;
-  reader = WebPGuessImageReader(data, data_size);
-  ok = reader(data, data_size, pic, 1, NULL);
-  WebPFree((void*)data);
-  return ok;
-}
-
-static int SetLoopCount(int loop_count, WebPData* const webp_data) {
-  int ok = 1;
-  WebPMuxError err;
-  uint32_t features;
-  WebPMuxAnimParams new_params;
-  WebPMux* const mux = WebPMuxCreate(webp_data, 1);
-  if (mux == NULL) return 0;
-
-  err = WebPMuxGetFeatures(mux, &features);
-  ok = (err == WEBP_MUX_OK);
-  if (!ok || !(features & ANIMATION_FLAG)) goto End;
-
-  err = WebPMuxGetAnimationParams(mux, &new_params);
-  ok = (err == WEBP_MUX_OK);
-  if (ok) {
-    new_params.loop_count = loop_count;
-    err = WebPMuxSetAnimationParams(mux, &new_params);
-    ok = (err == WEBP_MUX_OK);
-  }
-  if (ok) {
-    WebPDataClear(webp_data);
-    err = WebPMuxAssemble(mux, webp_data);
-    ok = (err == WEBP_MUX_OK);
-  }
-
- End:
-  WebPMuxDelete(mux);
-  if (!ok) {
-    fprintf(stderr, "Error during loop-count setting\n");
-  }
-  return ok;
-}
-
-//------------------------------------------------------------------------------
-
-int main(int argc, const char* argv[]) {
-  const char* output = NULL;
-  WebPAnimEncoder* enc = NULL;
-  int verbose = 0;
-  int pic_num = 0;
-  int duration = 100;
-  int timestamp_ms = 0;
-  int loop_count = 0;
-  int width = 0, height = 0;
-  WebPAnimEncoderOptions anim_config;
-  WebPConfig config;
-  WebPPicture pic;
-  WebPData webp_data;
-  int c;
-  int have_input = 0;
-  CommandLineArguments cmd_args;
-  int ok;
-
-  INIT_WARGV(argc, argv);
-
-  ok = ExUtilInitCommandLineArguments(argc - 1, argv + 1, &cmd_args);
-  if (!ok) FREE_WARGV_AND_RETURN(1);
-
-  argc = cmd_args.argc_;
-  argv = cmd_args.argv_;
-
-  WebPDataInit(&webp_data);
-  if (!WebPAnimEncoderOptionsInit(&anim_config) ||
-      !WebPConfigInit(&config) ||
-      !WebPPictureInit(&pic)) {
-    fprintf(stderr, "Library version mismatch!\n");
-    ok = 0;
-    goto End;
-  }
-
-  // 1st pass of option parsing
-  for (c = 0; ok && c < argc; ++c) {
-    if (argv[c][0] == '-') {
-      int parse_error = 0;
-      if (!strcmp(argv[c], "-o") && c + 1 < argc) {
-        argv[c] = NULL;
-        output = (const char*)GET_WARGV_SHIFTED(argv, ++c);
-      } else if (!strcmp(argv[c], "-kmin") && c + 1 < argc) {
-        argv[c] = NULL;
-        anim_config.kmin = ExUtilGetInt(argv[++c], 0, &parse_error);
-      } else if (!strcmp(argv[c], "-kmax") && c + 1 < argc) {
-        argv[c] = NULL;
-        anim_config.kmax = ExUtilGetInt(argv[++c], 0, &parse_error);
-      } else if (!strcmp(argv[c], "-loop") && c + 1 < argc) {
-        argv[c] = NULL;
-        loop_count = ExUtilGetInt(argv[++c], 0, &parse_error);
-        if (loop_count < 0) {
-          fprintf(stderr, "Invalid non-positive loop-count (%d)\n", loop_count);
-          parse_error = 1;
-        }
-      } else if (!strcmp(argv[c], "-min_size")) {
-        anim_config.minimize_size = 1;
-      } else if (!strcmp(argv[c], "-mixed")) {
-        anim_config.allow_mixed = 1;
-        config.lossless = 0;
-      } else if (!strcmp(argv[c], "-near_lossless") && c + 1 < argc) {
-        argv[c] = NULL;
-        config.near_lossless = ExUtilGetInt(argv[++c], 0, &parse_error);
-      } else if (!strcmp(argv[c], "-sharp_yuv")) {
-        config.use_sharp_yuv = 1;
-      } else if (!strcmp(argv[c], "-v")) {
-        verbose = 1;
-      } else if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
-        Help();
-        FREE_WARGV_AND_RETURN(0);
-      } else if (!strcmp(argv[c], "-version")) {
-        const int enc_version = WebPGetEncoderVersion();
-        const int mux_version = WebPGetMuxVersion();
-        const int sharpyuv_version = SharpYuvGetVersion();
-        printf("WebP Encoder version: %d.%d.%d\nWebP Mux version: %d.%d.%d\n",
-               (enc_version >> 16) & 0xff, (enc_version >> 8) & 0xff,
-               enc_version & 0xff, (mux_version >> 16) & 0xff,
-               (mux_version >> 8) & 0xff, mux_version & 0xff);
-        printf("libsharpyuv: %d.%d.%d\n", (sharpyuv_version >> 24) & 0xff,
-               (sharpyuv_version >> 16) & 0xffff, sharpyuv_version & 0xff);
-        goto End;
-      } else {
-        continue;
-      }
-      ok = !parse_error;
-      if (!ok) goto End;
-      argv[c] = NULL;   // mark option as 'parsed' during 1st pass
-    } else {
-      have_input |= 1;
-    }
-  }
-  if (!have_input) {
-    fprintf(stderr, "No input file(s) for generating animation!\n");
-    goto End;
-  }
-
-  // image-reading pass
-  pic_num = 0;
-  config.lossless = 1;
-  for (c = 0; ok && c < argc; ++c) {
-    if (argv[c] == NULL) continue;
-    if (argv[c][0] == '-') {    // parse local options
-      int parse_error = 0;
-      if (!strcmp(argv[c], "-lossy")) {
-        if (!anim_config.allow_mixed) config.lossless = 0;
-      } else if (!strcmp(argv[c], "-lossless")) {
-        if (!anim_config.allow_mixed) config.lossless = 1;
-      } else if (!strcmp(argv[c], "-q") && c + 1 < argc) {
-        config.quality = ExUtilGetFloat(argv[++c], &parse_error);
-      } else if (!strcmp(argv[c], "-m") && c + 1 < argc) {
-        config.method = ExUtilGetInt(argv[++c], 0, &parse_error);
-      } else if (!strcmp(argv[c], "-d") && c + 1 < argc) {
-        duration = ExUtilGetInt(argv[++c], 0, &parse_error);
-        if (duration <= 0) {
-          fprintf(stderr, "Invalid negative duration (%d)\n", duration);
-          parse_error = 1;
-        }
-      } else {
-        parse_error = 1;   // shouldn't be here.
-        fprintf(stderr, "Unknown option [%s]\n", argv[c]);
-      }
-      ok = !parse_error;
-      if (!ok) goto End;
-      continue;
-    }
-
-    if (ok) {
-      ok = WebPValidateConfig(&config);
-      if (!ok) {
-        fprintf(stderr, "Invalid configuration.\n");
-        goto End;
-      }
-    }
-
-    // read next input image
-    pic.use_argb = 1;
-    ok = ReadImage((const char*)GET_WARGV_SHIFTED(argv, c), &pic);
-    if (!ok) goto End;
-
-    if (enc == NULL) {
-      width  = pic.width;
-      height = pic.height;
-      enc = WebPAnimEncoderNew(width, height, &anim_config);
-      ok = (enc != NULL);
-      if (!ok) {
-        fprintf(stderr, "Could not create WebPAnimEncoder object.\n");
-      }
-    }
-
-    if (ok) {
-      ok = (width == pic.width && height == pic.height);
-      if (!ok) {
-        fprintf(stderr, "Frame #%d dimension mismatched! "
-                        "Got %d x %d. Was expecting %d x %d.\n",
-                pic_num, pic.width, pic.height, width, height);
-      }
-    }
-
-    if (ok) {
-      ok = WebPAnimEncoderAdd(enc, &pic, timestamp_ms, &config);
-      if (!ok) {
-        fprintf(stderr, "Error while adding frame #%d\n", pic_num);
-      }
-    }
-    WebPPictureFree(&pic);
-    if (!ok) goto End;
-
-    if (verbose) {
-      WFPRINTF(stderr, "Added frame #%3d at time %4d (file: %s)\n",
-               pic_num, timestamp_ms, GET_WARGV_SHIFTED(argv, c));
-    }
-    timestamp_ms += duration;
-    ++pic_num;
-  }
-
-  // add a last fake frame to signal the last duration
-  ok = ok && WebPAnimEncoderAdd(enc, NULL, timestamp_ms, NULL);
-  ok = ok && WebPAnimEncoderAssemble(enc, &webp_data);
-  if (!ok) {
-    fprintf(stderr, "Error during final animation assembly.\n");
-  }
-
- End:
-  // free resources
-  WebPAnimEncoderDelete(enc);
-
-  if (ok && loop_count > 0) {  // Re-mux to add loop count.
-    ok = SetLoopCount(loop_count, &webp_data);
-  }
-
-  if (ok) {
-    if (output != NULL) {
-      ok = ImgIoUtilWriteFile(output, webp_data.bytes, webp_data.size);
-      if (ok) WFPRINTF(stderr, "output file: %s     ", (const W_CHAR*)output);
-    } else {
-      fprintf(stderr, "[no output file specified]   ");
-    }
-  }
-
-  if (ok) {
-    fprintf(stderr, "[%d frames, %u bytes].\n",
-            pic_num, (unsigned int)webp_data.size);
-  }
-  WebPDataClear(&webp_data);
-  ExUtilDeleteCommandLineArguments(&cmd_args);
-  FREE_WARGV_AND_RETURN(ok ? 0 : 1);
-}

external/libwebp/libwebp/examples/stopwatch.h

@@ -1,63 +0,0 @@
-// Copyright 2011 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Helper functions to measure elapsed time.
-//
-// Author: Mikolaj Zalewski (mikolajz@google.com)
-
-#ifndef WEBP_EXAMPLES_STOPWATCH_H_
-#define WEBP_EXAMPLES_STOPWATCH_H_
-
-#include "webp/types.h"
-
-#if defined _WIN32 && !defined __GNUC__
-#include <windows.h>
-
-typedef LARGE_INTEGER Stopwatch;
-
-static WEBP_INLINE void StopwatchReset(Stopwatch* watch) {
-  QueryPerformanceCounter(watch);
-}
-
-static WEBP_INLINE double StopwatchReadAndReset(Stopwatch* watch) {
-  const LARGE_INTEGER old_value = *watch;
-  LARGE_INTEGER freq;
-  if (!QueryPerformanceCounter(watch))
-    return 0.0;
-  if (!QueryPerformanceFrequency(&freq))
-    return 0.0;
-  if (freq.QuadPart == 0)
-    return 0.0;
-  return (watch->QuadPart - old_value.QuadPart) / (double)freq.QuadPart;
-}
-
-
-#else    /* !_WIN32 */
-#include <string.h>  // memcpy
-#include <sys/time.h>
-
-typedef struct timeval Stopwatch;
-
-static WEBP_INLINE void StopwatchReset(Stopwatch* watch) {
-  gettimeofday(watch, NULL);
-}
-
-static WEBP_INLINE double StopwatchReadAndReset(Stopwatch* watch) {
-  struct timeval old_value;
-  double delta_sec, delta_usec;
-  memcpy(&old_value, watch, sizeof(old_value));
-  gettimeofday(watch, NULL);
-  delta_sec = (double)watch->tv_sec - old_value.tv_sec;
-  delta_usec = (double)watch->tv_usec - old_value.tv_usec;
-  return delta_sec + delta_usec / 1000000.0;
-}
-
-#endif   /* _WIN32 */
-
-#endif  // WEBP_EXAMPLES_STOPWATCH_H_

external/libwebp/libwebp/examples/unicode.h

@@ -1,116 +0,0 @@
-// Copyright 2018 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Unicode support for Windows. The main idea is to maintain an array of Unicode
-// arguments (wargv) and use it only for file paths. The regular argv is used
-// for everything else.
-//
-// Author: Yannis Guyon (yguyon@google.com)
-
-#ifndef WEBP_EXAMPLES_UNICODE_H_
-#define WEBP_EXAMPLES_UNICODE_H_
-
-#include <stdio.h>
-
-#if defined(_WIN32) && defined(_UNICODE)
-
-// wchar_t is used instead of TCHAR because we only perform additional work when
-// Unicode is enabled and because the output of CommandLineToArgvW() is wchar_t.
-
-#include <fcntl.h>
-#include <io.h>
-#include <wchar.h>
-#include <windows.h>
-#include <shellapi.h>
-
-// Create a wchar_t array containing Unicode parameters.
-#define INIT_WARGV(ARGC, ARGV)                                                \
-  int wargc;                                                                  \
-  const W_CHAR** const wargv =                                                \
-      (const W_CHAR**)CommandLineToArgvW(GetCommandLineW(), &wargc);          \
-  do {                                                                        \
-    if (wargv == NULL || wargc != (ARGC)) {                                   \
-      fprintf(stderr, "Error: Unable to get Unicode arguments.\n");           \
-      FREE_WARGV_AND_RETURN(-1);                                              \
-    }                                                                         \
-  } while (0)
-
-// Use this to get a Unicode argument (e.g. file path).
-#define GET_WARGV(UNUSED, C) wargv[C]
-// For cases where argv is shifted by one compared to wargv.
-#define GET_WARGV_SHIFTED(UNUSED, C) wargv[(C) + 1]
-#define GET_WARGV_OR_NULL() wargv
-
-// Release resources. LocalFree() is needed after CommandLineToArgvW().
-#define FREE_WARGV() LOCAL_FREE((W_CHAR** const)wargv)
-#define LOCAL_FREE(WARGV)                  \
-  do {                                     \
-    if ((WARGV) != NULL) LocalFree(WARGV); \
-  } while (0)
-
-#define W_CHAR wchar_t  // WCHAR without underscore might already be defined.
-#define TO_W_CHAR(STR) (L##STR)
-
-#define WFOPEN(ARG, OPT) _wfopen((const W_CHAR*)ARG, TO_W_CHAR(OPT))
-
-#define WFPRINTF(STREAM, STR, ...)                    \
-  do {                                                \
-    int prev_mode;                                    \
-    fflush(STREAM);                                   \
-    prev_mode = _setmode(_fileno(STREAM), _O_U8TEXT); \
-    fwprintf(STREAM, TO_W_CHAR(STR), __VA_ARGS__);    \
-    fflush(STREAM);                                   \
-    (void)_setmode(_fileno(STREAM), prev_mode);       \
-  } while (0)
-#define WPRINTF(STR, ...) WFPRINTF(stdout, STR, __VA_ARGS__)
-
-#define WSTRLEN(FILENAME) wcslen((const W_CHAR*)FILENAME)
-#define WSTRCMP(FILENAME, STR) wcscmp((const W_CHAR*)FILENAME, TO_W_CHAR(STR))
-#define WSTRRCHR(FILENAME, STR) wcsrchr((const W_CHAR*)FILENAME, TO_W_CHAR(STR))
-#define WSNPRINTF(A, B, STR, ...) _snwprintf(A, B, TO_W_CHAR(STR), __VA_ARGS__)
-
-#else
-
-#include <string.h>
-
-// Unicode file paths work as is on Unix platforms, and no extra work is done on
-// Windows either if Unicode is disabled.
-
-#define INIT_WARGV(ARGC, ARGV)
-
-#define GET_WARGV(ARGV, C) (ARGV)[C]
-#define GET_WARGV_SHIFTED(ARGV, C) (ARGV)[C]
-#define GET_WARGV_OR_NULL() NULL
-
-#define FREE_WARGV()
-#define LOCAL_FREE(WARGV)
-
-#define W_CHAR char
-#define TO_W_CHAR(STR) (STR)
-
-#define WFOPEN(ARG, OPT) fopen(ARG, OPT)
-
-#define WPRINTF(STR, ...) printf(STR, __VA_ARGS__)
-#define WFPRINTF(STREAM, STR, ...) fprintf(STREAM, STR, __VA_ARGS__)
-
-#define WSTRLEN(FILENAME) strlen(FILENAME)
-#define WSTRCMP(FILENAME, STR) strcmp(FILENAME, STR)
-#define WSTRRCHR(FILENAME, STR) strrchr(FILENAME, STR)
-#define WSNPRINTF(A, B, STR, ...) snprintf(A, B, STR, __VA_ARGS__)
-
-#endif  // defined(_WIN32) && defined(_UNICODE)
-
-// Don't forget to free wargv before returning (e.g. from main).
-#define FREE_WARGV_AND_RETURN(VALUE) \
-  do {                               \
-    FREE_WARGV();                    \
-    return (VALUE);                  \
-  } while (0)
-
-#endif  // WEBP_EXAMPLES_UNICODE_H_

external/libwebp/libwebp/examples/unicode_gif.h

@@ -1,76 +0,0 @@
-// Copyright 2018 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// giflib doesn't have a Unicode DGifOpenFileName(). Let's make one.
-//
-// Author: Yannis Guyon (yguyon@google.com)
-
-#ifndef WEBP_EXAMPLES_UNICODE_GIF_H_
-#define WEBP_EXAMPLES_UNICODE_GIF_H_
-
-#include "./unicode.h"
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"  // For WEBP_HAVE_GIF
-#endif
-
-#if defined(WEBP_HAVE_GIF)
-
-#ifdef _WIN32
-#include <fcntl.h>  // Not standard, needed for _topen and flags.
-#include <io.h>
-#endif
-
-#include <gif_lib.h>
-#include <string.h>
-#include "./gifdec.h"
-
-#if !defined(STDIN_FILENO)
-#define STDIN_FILENO 0
-#endif
-
-static GifFileType* DGifOpenFileUnicode(const W_CHAR* file_name, int* error) {
-  if (!WSTRCMP(file_name, "-")) {
-#if LOCAL_GIF_PREREQ(5, 0)
-    return DGifOpenFileHandle(STDIN_FILENO, error);
-#else
-    (void)error;
-    return DGifOpenFileHandle(STDIN_FILENO);
-#endif
-  }
-
-#if defined(_WIN32) && defined(_UNICODE)
-  {
-    int file_handle = _wopen(file_name, _O_RDONLY | _O_BINARY);
-    if (file_handle == -1) {
-      if (error != NULL) *error = D_GIF_ERR_OPEN_FAILED;
-      return NULL;
-    }
-
-#if LOCAL_GIF_PREREQ(5, 0)
-    return DGifOpenFileHandle(file_handle, error);
-#else
-    return DGifOpenFileHandle(file_handle);
-#endif
-  }
-
-#else
-
-#if LOCAL_GIF_PREREQ(5, 0)
-  return DGifOpenFileName(file_name, error);
-#else
-  return DGifOpenFileName(file_name);
-#endif
-
-#endif  // defined(_WIN32) && defined(_UNICODE)
-  // DGifCloseFile() is called later.
-}
-
-#endif  // defined(WEBP_HAVE_GIF)
-
-#endif  // WEBP_EXAMPLES_UNICODE_GIF_H_

external/libwebp/libwebp/examples/vwebp.c

@@ -1,654 +0,0 @@
-// Copyright 2011 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Simple OpenGL-based WebP file viewer.
-//
-// Author: Skal (pascal.massimino@gmail.com)
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#if defined(__unix__) || defined(__CYGWIN__)
-#define _POSIX_C_SOURCE 200112L  // for setenv
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#if defined(WEBP_HAVE_GL)
-
-#if defined(HAVE_GLUT_GLUT_H)
-#include <GLUT/glut.h>
-#else
-#include <GL/glut.h>
-#ifdef FREEGLUT
-#include <GL/freeglut.h>
-#endif
-#endif
-
-#ifdef WEBP_HAVE_QCMS
-#include <qcms.h>
-#endif
-
-#include "webp/decode.h"
-#include "webp/demux.h"
-
-#include "../examples/example_util.h"
-#include "../imageio/imageio_util.h"
-#include "./unicode.h"
-
-#if defined(_MSC_VER) && _MSC_VER < 1900
-#define snprintf _snprintf
-#endif
-
-// Unfortunate global variables. Gathered into a struct for comfort.
-static struct {
-  int has_animation;
-  int has_color_profile;
-  int done;
-  int decoding_error;
-  int print_info;
-  int only_deltas;
-  int use_color_profile;
-  int draw_anim_background_color;
-
-  int canvas_width, canvas_height;
-  int loop_count;
-  uint32_t bg_color;
-
-  const char* file_name;
-  WebPData data;
-  WebPDecoderConfig config;
-  const WebPDecBuffer* pic;
-  WebPDemuxer* dmux;
-  WebPIterator curr_frame;
-  WebPIterator prev_frame;
-  WebPChunkIterator iccp;
-  int viewport_width, viewport_height;
-} kParams;
-
-static void ClearPreviousPic(void) {
-  WebPFreeDecBuffer((WebPDecBuffer*)kParams.pic);
-  kParams.pic = NULL;
-}
-
-static void ClearParams(void) {
-  ClearPreviousPic();
-  WebPDataClear(&kParams.data);
-  WebPDemuxReleaseIterator(&kParams.curr_frame);
-  WebPDemuxReleaseIterator(&kParams.prev_frame);
-  WebPDemuxReleaseChunkIterator(&kParams.iccp);
-  WebPDemuxDelete(kParams.dmux);
-  kParams.dmux = NULL;
-}
-
-// Sets the previous frame to the dimensions of the canvas and has it dispose
-// to background to cause the canvas to be cleared.
-static void ClearPreviousFrame(void) {
-  WebPIterator* const prev = &kParams.prev_frame;
-  prev->width = kParams.canvas_width;
-  prev->height = kParams.canvas_height;
-  prev->x_offset = prev->y_offset = 0;
-  prev->dispose_method = WEBP_MUX_DISPOSE_BACKGROUND;
-}
-
-// -----------------------------------------------------------------------------
-// Color profile handling
-static int ApplyColorProfile(const WebPData* const profile,
-                             WebPDecBuffer* const rgba) {
-#ifdef WEBP_HAVE_QCMS
-  int i, ok = 0;
-  uint8_t* line;
-  uint8_t major_revision;
-  qcms_profile* input_profile = NULL;
-  qcms_profile* output_profile = NULL;
-  qcms_transform* transform = NULL;
-  const qcms_data_type input_type = QCMS_DATA_RGBA_8;
-  const qcms_data_type output_type = QCMS_DATA_RGBA_8;
-  const qcms_intent intent = QCMS_INTENT_DEFAULT;
-
-  if (profile == NULL || rgba == NULL) return 0;
-  if (profile->bytes == NULL || profile->size < 10) return 1;
-  major_revision = profile->bytes[8];
-
-  qcms_enable_iccv4();
-  input_profile = qcms_profile_from_memory(profile->bytes, profile->size);
-  // qcms_profile_is_bogus() is broken with ICCv4.
-  if (input_profile == NULL ||
-      (major_revision < 4 && qcms_profile_is_bogus(input_profile))) {
-    fprintf(stderr, "Color profile is bogus!\n");
-    goto Error;
-  }
-
-  output_profile = qcms_profile_sRGB();
-  if (output_profile == NULL) {
-    fprintf(stderr, "Error creating output color profile!\n");
-    goto Error;
-  }
-
-  qcms_profile_precache_output_transform(output_profile);
-  transform = qcms_transform_create(input_profile, input_type,
-                                    output_profile, output_type,
-                                    intent);
-  if (transform == NULL) {
-    fprintf(stderr, "Error creating color transform!\n");
-    goto Error;
-  }
-
-  line = rgba->u.RGBA.rgba;
-  for (i = 0; i < rgba->height; ++i, line += rgba->u.RGBA.stride) {
-    qcms_transform_data(transform, line, line, rgba->width);
-  }
-  ok = 1;
-
- Error:
-  if (input_profile != NULL) qcms_profile_release(input_profile);
-  if (output_profile != NULL) qcms_profile_release(output_profile);
-  if (transform != NULL) qcms_transform_release(transform);
-  return ok;
-#else
-  (void)profile;
-  (void)rgba;
-  return 1;
-#endif  // WEBP_HAVE_QCMS
-}
-
-//------------------------------------------------------------------------------
-// File decoding
-
-static int Decode(void) {   // Fills kParams.curr_frame
-  const WebPIterator* const curr = &kParams.curr_frame;
-  WebPDecoderConfig* const config = &kParams.config;
-  WebPDecBuffer* const output_buffer = &config->output;
-  int ok = 0;
-
-  ClearPreviousPic();
-  output_buffer->colorspace = MODE_RGBA;
-  ok = (WebPDecode(curr->fragment.bytes, curr->fragment.size,
-                   config) == VP8_STATUS_OK);
-  if (!ok) {
-    fprintf(stderr, "Decoding of frame #%d failed!\n", curr->frame_num);
-  } else {
-    kParams.pic = output_buffer;
-    if (kParams.use_color_profile) {
-      ok = ApplyColorProfile(&kParams.iccp.chunk, output_buffer);
-      if (!ok) {
-        fprintf(stderr, "Applying color profile to frame #%d failed!\n",
-                curr->frame_num);
-      }
-    }
-  }
-  return ok;
-}
-
-static void decode_callback(int what) {
-  if (what == 0 && !kParams.done) {
-    int duration = 0;
-    if (kParams.dmux != NULL) {
-      WebPIterator* const curr = &kParams.curr_frame;
-      if (!WebPDemuxNextFrame(curr)) {
-        WebPDemuxReleaseIterator(curr);
-        if (WebPDemuxGetFrame(kParams.dmux, 1, curr)) {
-          --kParams.loop_count;
-          kParams.done = (kParams.loop_count == 0);
-          if (kParams.done) return;
-          ClearPreviousFrame();
-        } else {
-          kParams.decoding_error = 1;
-          kParams.done = 1;
-          return;
-        }
-      }
-      duration = curr->duration;
-      // Behavior copied from Chrome, cf:
-      // https://cs.chromium.org/chromium/src/third_party/WebKit/Source/
-      // platform/graphics/DeferredImageDecoder.cpp?
-      // rcl=b4c33049f096cd283f32be9a58b9a9e768227c26&l=246
-      if (duration <= 10) duration = 100;
-    }
-    if (!Decode()) {
-      kParams.decoding_error = 1;
-      kParams.done = 1;
-    } else {
-      glutPostRedisplay();
-      glutTimerFunc(duration, decode_callback, what);
-    }
-  }
-}
-
-//------------------------------------------------------------------------------
-// Callbacks
-
-static void HandleKey(unsigned char key, int pos_x, int pos_y) {
-  // Note: rescaling the window or toggling some features during an animation
-  // generates visual artifacts. This is not fixed because refreshing the frame
-  // may require rendering the whole animation from start till current frame.
-  (void)pos_x;
-  (void)pos_y;
-  if (key == 'q' || key == 'Q' || key == 27 /* Esc */) {
-#ifdef FREEGLUT
-    glutLeaveMainLoop();
-#else
-    ClearParams();
-    exit(0);
-#endif
-  } else if (key == 'c') {
-    if (kParams.has_color_profile && !kParams.decoding_error) {
-      kParams.use_color_profile = 1 - kParams.use_color_profile;
-
-      if (kParams.has_animation) {
-        // Restart the completed animation to pickup the color profile change.
-        if (kParams.done && kParams.loop_count == 0) {
-          kParams.loop_count =
-              (int)WebPDemuxGetI(kParams.dmux, WEBP_FF_LOOP_COUNT) + 1;
-          kParams.done = 0;
-          // Start the decode loop immediately.
-          glutTimerFunc(0, decode_callback, 0);
-        }
-      } else {
-        Decode();
-        glutPostRedisplay();
-      }
-    }
-  } else if (key == 'b') {
-    kParams.draw_anim_background_color = 1 - kParams.draw_anim_background_color;
-    if (!kParams.has_animation) ClearPreviousFrame();
-    glutPostRedisplay();
-  } else if (key == 'i') {
-    kParams.print_info = 1 - kParams.print_info;
-    if (!kParams.has_animation) ClearPreviousFrame();
-    glutPostRedisplay();
-  } else if (key == 'd') {
-    kParams.only_deltas = 1 - kParams.only_deltas;
-    glutPostRedisplay();
-  }
-}
-
-static void HandleReshape(int width, int height) {
-  // Note: reshape doesn't preserve aspect ratio, and might
-  // be handling larger-than-screen pictures incorrectly.
-  glViewport(0, 0, width, height);
-  glMatrixMode(GL_PROJECTION);
-  glLoadIdentity();
-  glMatrixMode(GL_MODELVIEW);
-  glLoadIdentity();
-  kParams.viewport_width = width;
-  kParams.viewport_height = height;
-  if (!kParams.has_animation) ClearPreviousFrame();
-}
-
-static void PrintString(const char* const text) {
-  void* const font = GLUT_BITMAP_9_BY_15;
-  int i;
-  for (i = 0; text[i]; ++i) {
-    glutBitmapCharacter(font, text[i]);
-  }
-}
-
-static void PrintStringW(const char* const text) {
-#if defined(_WIN32) && defined(_UNICODE)
-  void* const font = GLUT_BITMAP_9_BY_15;
-  const W_CHAR* const wtext = (const W_CHAR*)text;
-  int i;
-  for (i = 0; wtext[i]; ++i) {
-    glutBitmapCharacter(font, wtext[i]);
-  }
-#else
-  PrintString(text);
-#endif
-}
-
-static float GetColorf(uint32_t color, int shift) {
-  return ((color >> shift) & 0xff) / 255.f;
-}
-
-static void DrawCheckerBoard(void) {
-  const int square_size = 8;  // must be a power of 2
-  int x, y;
-  GLint viewport[4];  // x, y, width, height
-
-  glPushMatrix();
-
-  glGetIntegerv(GL_VIEWPORT, viewport);
-  // shift to integer coordinates with (0,0) being top-left.
-  glOrtho(0, viewport[2], viewport[3], 0, -1, 1);
-  for (y = 0; y < viewport[3]; y += square_size) {
-    for (x = 0; x < viewport[2]; x += square_size) {
-      const GLubyte color = 128 + 64 * (!((x + y) & square_size));
-      glColor3ub(color, color, color);
-      glRecti(x, y, x + square_size, y + square_size);
-    }
-  }
-  glPopMatrix();
-}
-
-static void DrawBackground(void) {
-  // Whole window cleared with clear color, checkerboard rendered on top of it.
-  glClear(GL_COLOR_BUFFER_BIT);
-  DrawCheckerBoard();
-
-  // ANIM background color rendered (blend) on top. Default is white for still
-  // images (without ANIM chunk). glClear() can't be used for that (no blend).
-  if (kParams.draw_anim_background_color) {
-    glPushMatrix();
-    glLoadIdentity();
-    glColor4f(GetColorf(kParams.bg_color, 16),  // BGRA from spec
-              GetColorf(kParams.bg_color, 8),
-              GetColorf(kParams.bg_color, 0),
-              GetColorf(kParams.bg_color, 24));
-    glRecti(-1, -1, +1, +1);
-    glPopMatrix();
-  }
-}
-
-// Draw background in a scissored rectangle.
-static void DrawBackgroundScissored(int window_x, int window_y, int frame_w,
-                                    int frame_h) {
-  // Only update the requested area, not the whole canvas.
-  window_x = window_x * kParams.viewport_width / kParams.canvas_width;
-  window_y = window_y * kParams.viewport_height / kParams.canvas_height;
-  frame_w = frame_w * kParams.viewport_width / kParams.canvas_width;
-  frame_h = frame_h * kParams.viewport_height / kParams.canvas_height;
-
-  // glScissor() takes window coordinates (0,0 at bottom left).
-  window_y = kParams.viewport_height - window_y - frame_h;
-
-  glEnable(GL_SCISSOR_TEST);
-  glScissor(window_x, window_y, frame_w, frame_h);
-  DrawBackground();
-  glDisable(GL_SCISSOR_TEST);
-}
-
-static void HandleDisplay(void) {
-  const WebPDecBuffer* const pic = kParams.pic;
-  const WebPIterator* const curr = &kParams.curr_frame;
-  WebPIterator* const prev = &kParams.prev_frame;
-  GLfloat xoff, yoff;
-  if (pic == NULL) return;
-  glPushMatrix();
-  glPixelZoom((GLfloat)(+1. / kParams.canvas_width * kParams.viewport_width),
-              (GLfloat)(-1. / kParams.canvas_height * kParams.viewport_height));
-  xoff = (GLfloat)(2. * curr->x_offset / kParams.canvas_width);
-  yoff = (GLfloat)(2. * curr->y_offset / kParams.canvas_height);
-  glRasterPos2f(-1.f + xoff, 1.f - yoff);
-  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-  glPixelStorei(GL_UNPACK_ROW_LENGTH, pic->u.RGBA.stride / 4);
-
-  if (kParams.only_deltas) {
-    DrawBackground();
-  } else {
-    // The rectangle of the previous frame might be different than the current
-    // frame, so we may need to DrawBackgroundScissored for both.
-    if (prev->dispose_method == WEBP_MUX_DISPOSE_BACKGROUND) {
-      // Clear the previous frame rectangle.
-      DrawBackgroundScissored(prev->x_offset, prev->y_offset, prev->width,
-                              prev->height);
-    }
-    if (curr->blend_method == WEBP_MUX_NO_BLEND) {
-      // We simulate no-blending behavior by first clearing the current frame
-      // rectangle and then alpha-blending against it.
-      DrawBackgroundScissored(curr->x_offset, curr->y_offset, curr->width,
-                              curr->height);
-    }
-  }
-
-  *prev = *curr;
-
-  glDrawPixels(pic->width, pic->height,
-               GL_RGBA, GL_UNSIGNED_BYTE,
-               (GLvoid*)pic->u.RGBA.rgba);
-  if (kParams.print_info) {
-    char tmp[32];
-
-    glColor4f(0.90f, 0.0f, 0.90f, 1.0f);
-    glRasterPos2f(-0.95f, 0.90f);
-    PrintStringW(kParams.file_name);
-
-    snprintf(tmp, sizeof(tmp), "Dimension:%d x %d", pic->width, pic->height);
-    glColor4f(0.90f, 0.0f, 0.90f, 1.0f);
-    glRasterPos2f(-0.95f, 0.80f);
-    PrintString(tmp);
-    if (curr->x_offset != 0 || curr->y_offset != 0) {
-      snprintf(tmp, sizeof(tmp), " (offset:%d,%d)",
-               curr->x_offset, curr->y_offset);
-      glRasterPos2f(-0.95f, 0.70f);
-      PrintString(tmp);
-    }
-  }
-  glPopMatrix();
-#if defined(__APPLE__) || defined(_WIN32)
-  glFlush();
-#else
-  glutSwapBuffers();
-#endif
-}
-
-static void StartDisplay(void) {
-  int width = kParams.canvas_width;
-  int height = kParams.canvas_height;
-  int screen_width, screen_height;
-  // TODO(webp:365) GLUT_DOUBLE results in flickering / old frames to be
-  // partially displayed with animated webp + alpha.
-#if defined(__APPLE__) || defined(_WIN32)
-  glutInitDisplayMode(GLUT_RGBA);
-#else
-  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
-#endif
-  screen_width = glutGet(GLUT_SCREEN_WIDTH);
-  screen_height = glutGet(GLUT_SCREEN_HEIGHT);
-  if (width > screen_width || height > screen_height) {
-    if (width > screen_width) {
-      height = (height * screen_width + width - 1) / width;
-      width = screen_width;
-    }
-    if (height > screen_height) {
-      width = (width * screen_height + height - 1) / height;
-      height = screen_height;
-    }
-  }
-  glutInitWindowSize(width, height);
-  glutCreateWindow("WebP viewer");
-  glutDisplayFunc(HandleDisplay);
-  glutReshapeFunc(HandleReshape);
-  glutIdleFunc(NULL);
-  glutKeyboardFunc(HandleKey);
-  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-  glEnable(GL_BLEND);
-  glClearColor(0, 0, 0, 0);  // window will be cleared to black (no blend)
-  DrawBackground();
-}
-
-//------------------------------------------------------------------------------
-// Main
-
-static void Help(void) {
-  printf(
-      "Usage: vwebp in_file [options]\n\n"
-      "Decodes the WebP image file and visualize it using OpenGL\n"
-      "Options are:\n"
-      "  -version ..... print version number and exit\n"
-      "  -noicc ....... don't use the icc profile if present\n"
-      "  -nofancy ..... don't use the fancy YUV420 upscaler\n"
-      "  -nofilter .... disable in-loop filtering\n"
-      "  -dither <int>  dithering strength (0..100), default=50\n"
-      "  -noalphadither disable alpha plane dithering\n"
-      "  -usebgcolor .. display background color\n"
-      "  -mt .......... use multi-threading\n"
-      "  -info ........ print info\n"
-      "  -h ........... this help message\n"
-      "\n"
-      "Keyboard shortcuts:\n"
-      "  'c' ................ toggle use of color profile\n"
-      "  'b' ................ toggle background color display\n"
-      "  'i' ................ overlay file information\n"
-      "  'd' ................ disable blending & disposal (debug)\n"
-      "  'q' / 'Q' / ESC .... quit\n");
-}
-
-int main(int argc, char* argv[]) {
-  int c;
-  WebPDecoderConfig* const config = &kParams.config;
-  WebPIterator* const curr = &kParams.curr_frame;
-
-  INIT_WARGV(argc, argv);
-
-  if (!WebPInitDecoderConfig(config)) {
-    fprintf(stderr, "Library version mismatch!\n");
-    FREE_WARGV_AND_RETURN(-1);
-  }
-  config->options.dithering_strength = 50;
-  config->options.alpha_dithering_strength = 100;
-  kParams.use_color_profile = 1;
-  // Background color hidden by default to see transparent areas.
-  kParams.draw_anim_background_color = 0;
-
-  for (c = 1; c < argc; ++c) {
-    int parse_error = 0;
-    if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
-      Help();
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-noicc")) {
-      kParams.use_color_profile = 0;
-    } else if (!strcmp(argv[c], "-nofancy")) {
-      config->options.no_fancy_upsampling = 1;
-    } else if (!strcmp(argv[c], "-nofilter")) {
-      config->options.bypass_filtering = 1;
-    } else if (!strcmp(argv[c], "-noalphadither")) {
-      config->options.alpha_dithering_strength = 0;
-    } else if (!strcmp(argv[c], "-usebgcolor")) {
-      kParams.draw_anim_background_color = 1;
-    } else if (!strcmp(argv[c], "-dither") && c + 1 < argc) {
-      config->options.dithering_strength =
-          ExUtilGetInt(argv[++c], 0, &parse_error);
-    } else if (!strcmp(argv[c], "-info")) {
-      kParams.print_info = 1;
-    } else if (!strcmp(argv[c], "-version")) {
-      const int dec_version = WebPGetDecoderVersion();
-      const int dmux_version = WebPGetDemuxVersion();
-      printf("WebP Decoder version: %d.%d.%d\nWebP Demux version: %d.%d.%d\n",
-             (dec_version >> 16) & 0xff, (dec_version >> 8) & 0xff,
-             dec_version & 0xff, (dmux_version >> 16) & 0xff,
-             (dmux_version >> 8) & 0xff, dmux_version & 0xff);
-      FREE_WARGV_AND_RETURN(0);
-    } else if (!strcmp(argv[c], "-mt")) {
-      config->options.use_threads = 1;
-    } else if (!strcmp(argv[c], "--")) {
-      if (c < argc - 1) kParams.file_name = (const char*)GET_WARGV(argv, ++c);
-      break;
-    } else if (argv[c][0] == '-') {
-      printf("Unknown option '%s'\n", argv[c]);
-      Help();
-      FREE_WARGV_AND_RETURN(-1);
-    } else {
-      kParams.file_name = (const char*)GET_WARGV(argv, c);
-    }
-
-    if (parse_error) {
-      Help();
-      FREE_WARGV_AND_RETURN(-1);
-    }
-  }
-
-  if (kParams.file_name == NULL) {
-    printf("missing input file!!\n");
-    Help();
-    FREE_WARGV_AND_RETURN(0);
-  }
-
-  if (!ImgIoUtilReadFile(kParams.file_name,
-                         &kParams.data.bytes, &kParams.data.size)) {
-    goto Error;
-  }
-
-  if (!WebPGetInfo(kParams.data.bytes, kParams.data.size, NULL, NULL)) {
-    fprintf(stderr, "Input file doesn't appear to be WebP format.\n");
-    goto Error;
-  }
-
-  kParams.dmux = WebPDemux(&kParams.data);
-  if (kParams.dmux == NULL) {
-    fprintf(stderr, "Could not create demuxing object!\n");
-    goto Error;
-  }
-
-  kParams.canvas_width = WebPDemuxGetI(kParams.dmux, WEBP_FF_CANVAS_WIDTH);
-  kParams.canvas_height = WebPDemuxGetI(kParams.dmux, WEBP_FF_CANVAS_HEIGHT);
-  if (kParams.print_info) {
-    printf("Canvas: %d x %d\n", kParams.canvas_width, kParams.canvas_height);
-  }
-
-  ClearPreviousFrame();
-
-  memset(&kParams.iccp, 0, sizeof(kParams.iccp));
-  kParams.has_color_profile =
-      !!(WebPDemuxGetI(kParams.dmux, WEBP_FF_FORMAT_FLAGS) & ICCP_FLAG);
-  if (kParams.has_color_profile) {
-#ifdef WEBP_HAVE_QCMS
-    if (!WebPDemuxGetChunk(kParams.dmux, "ICCP", 1, &kParams.iccp)) goto Error;
-    printf("VP8X: Found color profile\n");
-#else
-    fprintf(stderr, "Warning: color profile present, but qcms is unavailable!\n"
-            "Build libqcms from Mozilla or Chromium and define WEBP_HAVE_QCMS "
-            "before building.\n");
-#endif
-  }
-
-  if (!WebPDemuxGetFrame(kParams.dmux, 1, curr)) goto Error;
-
-  kParams.has_animation = (curr->num_frames > 1);
-  kParams.loop_count = (int)WebPDemuxGetI(kParams.dmux, WEBP_FF_LOOP_COUNT);
-  kParams.bg_color = WebPDemuxGetI(kParams.dmux, WEBP_FF_BACKGROUND_COLOR);
-  printf("VP8X: Found %d images in file (loop count = %d)\n",
-         curr->num_frames, kParams.loop_count);
-
-  // Decode first frame
-  if (!Decode()) goto Error;
-
-  // Position iterator to last frame. Next call to HandleDisplay will wrap over.
-  // We take this into account by bumping up loop_count.
-  WebPDemuxGetFrame(kParams.dmux, 0, curr);
-  if (kParams.loop_count) ++kParams.loop_count;
-
-#if defined(__unix__) || defined(__CYGWIN__)
-  // Work around GLUT compositor bug.
-  // https://bugs.launchpad.net/ubuntu/+source/freeglut/+bug/369891
-  setenv("XLIB_SKIP_ARGB_VISUALS", "1", 1);
-#endif
-
-  // Start display (and timer)
-  glutInit(&argc, argv);
-#ifdef FREEGLUT
-  glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION);
-#endif
-  StartDisplay();
-
-  if (kParams.has_animation) glutTimerFunc(0, decode_callback, 0);
-  glutMainLoop();
-
-  // Should only be reached when using FREEGLUT:
-  ClearParams();
-  FREE_WARGV_AND_RETURN(0);
-
- Error:
-  ClearParams();
-  FREE_WARGV_AND_RETURN(-1);
-}
-
-#else   // !WEBP_HAVE_GL
-
-int main(int argc, const char* argv[]) {
-  fprintf(stderr, "OpenGL support not enabled in %s.\n", argv[0]);
-  (void)argc;
-  return 0;
-}
-
-#endif
-
-//------------------------------------------------------------------------------

external/libwebp/libwebp/extras/Makefile.am

@@ -1,44 +0,0 @@
-AM_CPPFLAGS += -I$(top_builddir) -I$(top_srcdir)
-AM_CPPFLAGS += -I$(top_builddir)/src -I$(top_srcdir)/src
-noinst_LTLIBRARIES = libwebpextras.la
-
-noinst_HEADERS =
-noinst_HEADERS += ../src/webp/types.h
-
-libwebpextras_la_SOURCES =
-libwebpextras_la_SOURCES += extras.c extras.h quality_estimate.c
-
-libwebpextras_la_CPPFLAGS = $(AM_CPPFLAGS)
-libwebpextras_la_LDFLAGS = -lm
-libwebpextras_la_LIBADD = ../src/libwebp.la
-
-noinst_PROGRAMS =
-noinst_PROGRAMS += webp_quality
-if BUILD_DEMUX
-  noinst_PROGRAMS += get_disto
-endif
-if BUILD_VWEBP_SDL
-  noinst_PROGRAMS += vwebp_sdl
-endif
-
-get_disto_SOURCES  = get_disto.c
-get_disto_CPPFLAGS = $(AM_CPPFLAGS)
-get_disto_LDADD =
-get_disto_LDADD += ../imageio/libimageio_util.la
-get_disto_LDADD += ../imageio/libimagedec.la
-get_disto_LDADD += ../src/libwebp.la
-get_disto_LDADD += $(PNG_LIBS) $(JPEG_LIBS) $(TIFF_LIBS)
-
-webp_quality_SOURCES  = webp_quality.c
-webp_quality_CPPFLAGS = $(AM_CPPFLAGS)
-webp_quality_LDADD =
-webp_quality_LDADD += ../imageio/libimageio_util.la
-webp_quality_LDADD += libwebpextras.la
-webp_quality_LDADD += ../src/libwebp.la
-
-vwebp_sdl_SOURCES  = vwebp_sdl.c webp_to_sdl.c webp_to_sdl.h
-vwebp_sdl_CPPFLAGS = $(AM_CPPFLAGS) $(SDL_INCLUDES)
-vwebp_sdl_LDADD =
-vwebp_sdl_LDADD += ../imageio/libimageio_util.la
-vwebp_sdl_LDADD += ../src/libwebp.la
-vwebp_sdl_LDADD += $(SDL_LIBS)

external/libwebp/libwebp/extras/extras.c

@@ -1,162 +0,0 @@
-// Copyright 2015 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Additional WebP utilities.
-//
-
-#include "extras/extras.h"
-#include "webp/format_constants.h"
-#include "src/dsp/dsp.h"
-
-#include <assert.h>
-#include <string.h>
-
-#define XTRA_MAJ_VERSION 1
-#define XTRA_MIN_VERSION 3
-#define XTRA_REV_VERSION 1
-
-//------------------------------------------------------------------------------
-
-int WebPGetExtrasVersion(void) {
-  return (XTRA_MAJ_VERSION << 16) | (XTRA_MIN_VERSION << 8) | XTRA_REV_VERSION;
-}
-
-//------------------------------------------------------------------------------
-
-int WebPImportGray(const uint8_t* gray_data, WebPPicture* pic) {
-  int y, width, uv_width;
-  if (pic == NULL || gray_data == NULL) return 0;
-  pic->colorspace = WEBP_YUV420;
-  if (!WebPPictureAlloc(pic)) return 0;
-  width = pic->width;
-  uv_width = (width + 1) >> 1;
-  for (y = 0; y < pic->height; ++y) {
-    memcpy(pic->y + y * pic->y_stride, gray_data, width);
-    gray_data += width;    // <- we could use some 'data_stride' here if needed
-    if ((y & 1) == 0) {
-      memset(pic->u + (y >> 1) * pic->uv_stride, 128, uv_width);
-      memset(pic->v + (y >> 1) * pic->uv_stride, 128, uv_width);
-    }
-  }
-  return 1;
-}
-
-int WebPImportRGB565(const uint8_t* rgb565, WebPPicture* pic) {
-  int x, y;
-  uint32_t* dst;
-  if (pic == NULL || rgb565 == NULL) return 0;
-  pic->colorspace = WEBP_YUV420;
-  pic->use_argb = 1;
-  if (!WebPPictureAlloc(pic)) return 0;
-  dst = pic->argb;
-  for (y = 0; y < pic->height; ++y) {
-    const int width = pic->width;
-    for (x = 0; x < width; ++x) {
-#if defined(WEBP_SWAP_16BIT_CSP) && (WEBP_SWAP_16BIT_CSP == 1)
-      const uint32_t rg = rgb565[2 * x + 1];
-      const uint32_t gb = rgb565[2 * x + 0];
-#else
-      const uint32_t rg = rgb565[2 * x + 0];
-      const uint32_t gb = rgb565[2 * x + 1];
-#endif
-      uint32_t r = rg & 0xf8;
-      uint32_t g = ((rg << 5) | (gb >> 3)) & 0xfc;
-      uint32_t b = (gb << 5);
-      // dithering
-      r = r | (r >> 5);
-      g = g | (g >> 6);
-      b = b | (b >> 5);
-      dst[x] = (0xffu << 24) | (r << 16) | (g << 8) | b;
-    }
-    rgb565 += 2 * width;
-    dst += pic->argb_stride;
-  }
-  return 1;
-}
-
-int WebPImportRGB4444(const uint8_t* rgb4444, WebPPicture* pic) {
-  int x, y;
-  uint32_t* dst;
-  if (pic == NULL || rgb4444 == NULL) return 0;
-  pic->colorspace = WEBP_YUV420;
-  pic->use_argb = 1;
-  if (!WebPPictureAlloc(pic)) return 0;
-  dst = pic->argb;
-  for (y = 0; y < pic->height; ++y) {
-    const int width = pic->width;
-    for (x = 0; x < width; ++x) {
-#if defined(WEBP_SWAP_16BIT_CSP) && (WEBP_SWAP_16BIT_CSP == 1)
-      const uint32_t rg = rgb4444[2 * x + 1];
-      const uint32_t ba = rgb4444[2 * x + 0];
-#else
-      const uint32_t rg = rgb4444[2 * x + 0];
-      const uint32_t ba = rgb4444[2 * x + 1];
-#endif
-      uint32_t r = rg & 0xf0;
-      uint32_t g = (rg << 4);
-      uint32_t b = (ba & 0xf0);
-      uint32_t a = (ba << 4);
-      // dithering
-      r = r | (r >> 4);
-      g = g | (g >> 4);
-      b = b | (b >> 4);
-      a = a | (a >> 4);
-      dst[x] = (a << 24) | (r << 16) | (g << 8) | b;
-    }
-    rgb4444 += 2 * width;
-    dst += pic->argb_stride;
-  }
-  return 1;
-}
-
-int WebPImportColorMappedARGB(const uint8_t* indexed, int indexed_stride,
-                              const uint32_t palette[], int palette_size,
-                              WebPPicture* pic) {
-  int x, y;
-  uint32_t* dst;
-  // 256 as the input buffer is uint8_t.
-  assert(MAX_PALETTE_SIZE <= 256);
-  if (pic == NULL || indexed == NULL || indexed_stride < pic->width ||
-      palette == NULL || palette_size > MAX_PALETTE_SIZE || palette_size <= 0) {
-    return 0;
-  }
-  pic->use_argb = 1;
-  if (!WebPPictureAlloc(pic)) return 0;
-  dst = pic->argb;
-  for (y = 0; y < pic->height; ++y) {
-    for (x = 0; x < pic->width; ++x) {
-      // Make sure we are within the palette.
-      if (indexed[x] >= palette_size) {
-        WebPPictureFree(pic);
-        return 0;
-      }
-      dst[x] = palette[indexed[x]];
-    }
-    indexed += indexed_stride;
-    dst += pic->argb_stride;
-  }
-  return 1;
-}
-
-//------------------------------------------------------------------------------
-
-int WebPUnmultiplyARGB(WebPPicture* pic) {
-  int y;
-  uint32_t* dst;
-  if (pic == NULL || pic->use_argb != 1 || pic->argb == NULL) return 0;
-  WebPInitAlphaProcessing();
-  dst = pic->argb;
-  for (y = 0; y < pic->height; ++y) {
-    WebPMultARGBRow(dst, pic->width, /*inverse=*/1);
-    dst += pic->argb_stride;
-  }
-  return 1;
-}
-
-//------------------------------------------------------------------------------

external/libwebp/libwebp/extras/extras.h

@@ -1,77 +0,0 @@
-// Copyright 2015 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-
-#ifndef WEBP_EXTRAS_EXTRAS_H_
-#define WEBP_EXTRAS_EXTRAS_H_
-
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include "webp/encode.h"
-
-#define WEBP_EXTRAS_ABI_VERSION 0x0002    // MAJOR(8b) + MINOR(8b)
-
-//------------------------------------------------------------------------------
-
-// Returns the version number of the extras library, packed in hexadecimal using
-// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507.
-WEBP_EXTERN int WebPGetExtrasVersion(void);
-
-//------------------------------------------------------------------------------
-// Ad-hoc colorspace importers.
-
-// Import luma sample (gray scale image) into 'picture'. The 'picture'
-// width and height must be set prior to calling this function.
-WEBP_EXTERN int WebPImportGray(const uint8_t* gray, WebPPicture* picture);
-
-// Import rgb sample in RGB565 packed format into 'picture'. The 'picture'
-// width and height must be set prior to calling this function.
-WEBP_EXTERN int WebPImportRGB565(const uint8_t* rgb565, WebPPicture* pic);
-
-// Import rgb sample in RGB4444 packed format into 'picture'. The 'picture'
-// width and height must be set prior to calling this function.
-WEBP_EXTERN int WebPImportRGB4444(const uint8_t* rgb4444, WebPPicture* pic);
-
-// Import a color mapped image. The number of colors is less or equal to
-// MAX_PALETTE_SIZE. 'pic' must have been initialized. Its content, if any,
-// will be discarded. Returns 'false' in case of error, or if indexed[] contains
-// invalid indices.
-WEBP_EXTERN int
-WebPImportColorMappedARGB(const uint8_t* indexed, int indexed_stride,
-                          const uint32_t palette[], int palette_size,
-                          WebPPicture* pic);
-
-// Convert the ARGB content of 'pic' from associated to unassociated.
-// 'pic' can be for instance the result of calling of some WebPPictureImportXXX
-// functions, with pic->use_argb set to 'true'. It is assumed (and not checked)
-// that the pre-multiplied r/g/b values as less or equal than the alpha value.
-// Return false in case of error (invalid parameter, ...).
-WEBP_EXTERN int WebPUnmultiplyARGB(WebPPicture* pic);
-
-//------------------------------------------------------------------------------
-
-// Parse a bitstream, search for VP8 (lossy) header and report a
-// rough estimation of the quality factor used for compressing the bitstream.
-// If the bitstream is in lossless format, the special value '101' is returned.
-// Otherwise (lossy bitstream), the returned value is in the range [0..100].
-// Any error (invalid bitstream, animated WebP, incomplete header, etc.)
-// will return a value of -1.
-WEBP_EXTERN int VP8EstimateQuality(const uint8_t* const data, size_t size);
-
-//------------------------------------------------------------------------------
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_EXTRAS_EXTRAS_H_

external/libwebp/libwebp/extras/get_disto.c

@@ -1,356 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Simple tool to load two webp/png/jpg/tiff files and compute PSNR/SSIM.
-// This is mostly a wrapper around WebPPictureDistortion().
-//
-/*
- gcc -o get_disto get_disto.c -O3 -I../ -L../examples -L../imageio \
-    -lexample_util -limageio_util -limagedec -lwebp -L/opt/local/lib \
-    -lpng -lz -ljpeg -ltiff -lm -lpthread
-*/
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "webp/encode.h"
-#include "imageio/image_dec.h"
-#include "imageio/imageio_util.h"
-#include "../examples/unicode.h"
-
-static size_t ReadPicture(const char* const filename, WebPPicture* const pic,
-                          int keep_alpha) {
-  const uint8_t* data = NULL;
-  size_t data_size = 0;
-  WebPImageReader reader = NULL;
-  int ok = ImgIoUtilReadFile(filename, &data, &data_size);
-  if (!ok) goto End;
-
-  pic->use_argb = 1;  // force ARGB
-
-#ifdef HAVE_WINCODEC_H
-  // Try to decode the file using WIC falling back to the other readers for
-  // e.g., WebP.
-  ok = ReadPictureWithWIC(filename, pic, keep_alpha, NULL);
-  if (ok) goto End;
-#endif
-  reader = WebPGuessImageReader(data, data_size);
-  ok = reader(data, data_size, pic, keep_alpha, NULL);
-
- End:
-  if (!ok) {
-    WFPRINTF(stderr, "Error! Could not process file %s\n",
-             (const W_CHAR*)filename);
-  }
-  free((void*)data);
-  return ok ? data_size : 0;
-}
-
-static void RescalePlane(uint8_t* plane, int width, int height,
-                         int x_stride, int y_stride, int max) {
-  const uint32_t factor = (max > 0) ? (255u << 16) / max : 0;
-  int x, y;
-  for (y = 0; y < height; ++y) {
-    uint8_t* const ptr = plane + y * y_stride;
-    for (x = 0; x < width * x_stride; x += x_stride) {
-      const uint32_t diff = (ptr[x] * factor + (1 << 15)) >> 16;
-      ptr[x] = diff;
-    }
-  }
-}
-
-// Return the max absolute difference.
-static int DiffScaleChannel(uint8_t* src1, int stride1,
-                            const uint8_t* src2, int stride2,
-                            int x_stride, int w, int h, int do_scaling) {
-  int x, y;
-  int max = 0;
-  for (y = 0; y < h; ++y) {
-    uint8_t* const ptr1 = src1 + y * stride1;
-    const uint8_t* const ptr2 = src2 + y * stride2;
-    for (x = 0; x < w * x_stride; x += x_stride) {
-      const int diff = abs(ptr1[x] - ptr2[x]);
-      if (diff > max) max = diff;
-      ptr1[x] = diff;
-    }
-  }
-
-  if (do_scaling) RescalePlane(src1, w, h, x_stride, stride1, max);
-  return max;
-}
-
-//------------------------------------------------------------------------------
-// SSIM calculation. We re-implement these functions here, out of dsp/, to avoid
-// breaking the library's hidden visibility. This code duplication avoids the
-// bigger annoyance of having to open up internal details of libdsp...
-
-#define SSIM_KERNEL 3   // total size of the kernel: 2 * SSIM_KERNEL + 1
-
-// struct for accumulating statistical moments
-typedef struct {
-  uint32_t w;              // sum(w_i) : sum of weights
-  uint32_t xm, ym;         // sum(w_i * x_i), sum(w_i * y_i)
-  uint32_t xxm, xym, yym;  // sum(w_i * x_i * x_i), etc.
-} DistoStats;
-
-// hat-shaped filter. Sum of coefficients is equal to 16.
-static const uint32_t kWeight[2 * SSIM_KERNEL + 1] = { 1, 2, 3, 4, 3, 2, 1 };
-
-static WEBP_INLINE double SSIMCalculation(const DistoStats* const stats) {
-  const uint32_t N = stats->w;
-  const uint32_t w2 =  N * N;
-  const uint32_t C1 = 20 * w2;
-  const uint32_t C2 = 60 * w2;
-  const uint32_t C3 = 8 * 8 * w2;   // 'dark' limit ~= 6
-  const uint64_t xmxm = (uint64_t)stats->xm * stats->xm;
-  const uint64_t ymym = (uint64_t)stats->ym * stats->ym;
-  if (xmxm + ymym >= C3) {
-    const int64_t xmym = (int64_t)stats->xm * stats->ym;
-    const int64_t sxy = (int64_t)stats->xym * N - xmym;    // can be negative
-    const uint64_t sxx = (uint64_t)stats->xxm * N - xmxm;
-    const uint64_t syy = (uint64_t)stats->yym * N - ymym;
-    // we descale by 8 to prevent overflow during the fnum/fden multiply.
-    const uint64_t num_S = (2 * (uint64_t)(sxy < 0 ? 0 : sxy) + C2) >> 8;
-    const uint64_t den_S = (sxx + syy + C2) >> 8;
-    const uint64_t fnum = (2 * xmym + C1) * num_S;
-    const uint64_t fden = (xmxm + ymym + C1) * den_S;
-    const double r = (double)fnum / fden;
-    assert(r >= 0. && r <= 1.0);
-    return r;
-  }
-  return 1.;   // area is too dark to contribute meaningfully
-}
-
-static double SSIMGetClipped(const uint8_t* src1, int stride1,
-                             const uint8_t* src2, int stride2,
-                             int xo, int yo, int W, int H) {
-  DistoStats stats = { 0, 0, 0, 0, 0, 0 };
-  const int ymin = (yo - SSIM_KERNEL < 0) ? 0 : yo - SSIM_KERNEL;
-  const int ymax = (yo + SSIM_KERNEL > H - 1) ? H - 1 : yo + SSIM_KERNEL;
-  const int xmin = (xo - SSIM_KERNEL < 0) ? 0 : xo - SSIM_KERNEL;
-  const int xmax = (xo + SSIM_KERNEL > W - 1) ? W - 1 : xo + SSIM_KERNEL;
-  int x, y;
-  src1 += ymin * stride1;
-  src2 += ymin * stride2;
-  for (y = ymin; y <= ymax; ++y, src1 += stride1, src2 += stride2) {
-    for (x = xmin; x <= xmax; ++x) {
-      const uint32_t w = kWeight[SSIM_KERNEL + x - xo]
-                       * kWeight[SSIM_KERNEL + y - yo];
-      const uint32_t s1 = src1[x];
-      const uint32_t s2 = src2[x];
-      stats.w   += w;
-      stats.xm  += w * s1;
-      stats.ym  += w * s2;
-      stats.xxm += w * s1 * s1;
-      stats.xym += w * s1 * s2;
-      stats.yym += w * s2 * s2;
-    }
-  }
-  return SSIMCalculation(&stats);
-}
-
-// Compute SSIM-score map. Return -1 in case of error, max diff otherwise.
-static int SSIMScaleChannel(uint8_t* src1, int stride1,
-                            const uint8_t* src2, int stride2,
-                            int x_stride, int w, int h, int do_scaling) {
-  int x, y;
-  int max = 0;
-  uint8_t* const plane1 = (uint8_t*)malloc(2 * w * h * sizeof(*plane1));
-  uint8_t* const plane2 = plane1 + w * h;
-  if (plane1 == NULL) return -1;
-
-  // extract plane
-  for (y = 0; y < h; ++y) {
-    for (x = 0; x < w; ++x) {
-      plane1[x + y * w] = src1[x * x_stride + y * stride1];
-      plane2[x + y * w] = src2[x * x_stride + y * stride2];
-    }
-  }
-  for (y = 0; y < h; ++y) {
-    for (x = 0; x < w; ++x) {
-      const double ssim = SSIMGetClipped(plane1, w, plane2, w, x, y, w, h);
-      int diff = (int)(255 * (1. - ssim));
-      if (diff < 0) {
-        diff = 0;
-      } else if (diff > max) {
-        max = diff;
-      }
-      src1[x * x_stride + y * stride1] = (diff > 255) ? 255u : (uint8_t)diff;
-    }
-  }
-  free(plane1);
-
-  if (do_scaling) RescalePlane(src1, w, h, x_stride, stride1, max);
-  return max;
-}
-
-// Convert an argb picture to luminance.
-static void ConvertToGray(WebPPicture* const pic) {
-  int x, y;
-  assert(pic != NULL);
-  assert(pic->use_argb);
-  for (y = 0; y < pic->height; ++y) {
-    uint32_t* const row = &pic->argb[y * pic->argb_stride];
-    for (x = 0; x < pic->width; ++x) {
-      const uint32_t argb = row[x];
-      const uint32_t r = (argb >> 16) & 0xff;
-      const uint32_t g = (argb >>  8) & 0xff;
-      const uint32_t b = (argb >>  0) & 0xff;
-      // We use BT.709 for converting to luminance.
-      const uint32_t Y = (uint32_t)(0.2126 * r + 0.7152 * g + 0.0722 * b + .5);
-      row[x] = (argb & 0xff000000u) | (Y * 0x010101u);
-    }
-  }
-}
-
-static void Help(void) {
-  fprintf(stderr,
-          "Usage: get_disto [-ssim][-psnr][-alpha] compressed.webp orig.webp\n"
-          "  -ssim ..... print SSIM distortion\n"
-          "  -psnr ..... print PSNR distortion (default)\n"
-          "  -alpha .... preserve alpha plane\n"
-          "  -h ........ this message\n"
-          "  -o <file> . save the diff map as a WebP lossless file\n"
-          "  -scale .... scale the difference map to fit [0..255] range\n"
-          "  -gray ..... use grayscale for difference map (-scale)\n"
-          "\nSupported input formats:\n  %s\n",
-          WebPGetEnabledInputFileFormats());
-}
-
-int main(int argc, const char* argv[]) {
-  WebPPicture pic1, pic2;
-  size_t size1 = 0, size2 = 0;
-  int ret = 1;
-  float disto[5];
-  int type = 0;
-  int c;
-  int help = 0;
-  int keep_alpha = 0;
-  int scale = 0;
-  int use_gray = 0;
-  const char* name1 = NULL;
-  const char* name2 = NULL;
-  const char* output = NULL;
-
-  INIT_WARGV(argc, argv);
-
-  if (!WebPPictureInit(&pic1) || !WebPPictureInit(&pic2)) {
-    fprintf(stderr, "Can't init pictures\n");
-    FREE_WARGV_AND_RETURN(1);
-  }
-
-  for (c = 1; c < argc; ++c) {
-    if (!strcmp(argv[c], "-ssim")) {
-      type = 1;
-    } else if (!strcmp(argv[c], "-psnr")) {
-      type = 0;
-    } else if (!strcmp(argv[c], "-alpha")) {
-      keep_alpha = 1;
-    } else if (!strcmp(argv[c], "-scale")) {
-      scale = 1;
-    } else if (!strcmp(argv[c], "-gray")) {
-      use_gray = 1;
-    } else if (!strcmp(argv[c], "-h")) {
-      help = 1;
-      ret = 0;
-    } else if (!strcmp(argv[c], "-o")) {
-      if (++c == argc) {
-        fprintf(stderr, "missing file name after %s option.\n", argv[c - 1]);
-        goto End;
-      }
-      output = (const char*)GET_WARGV(argv, c);
-    } else if (name1 == NULL) {
-      name1 = (const char*)GET_WARGV(argv, c);
-    } else {
-      name2 = (const char*)GET_WARGV(argv, c);
-    }
-  }
-  if (help || name1 == NULL || name2 == NULL) {
-    if (!help) {
-      fprintf(stderr, "Error: missing arguments.\n");
-    }
-    Help();
-    goto End;
-  }
-  size1 = ReadPicture(name1, &pic1, 1);
-  size2 = ReadPicture(name2, &pic2, 1);
-  if (size1 == 0 || size2 == 0) goto End;
-
-  if (!keep_alpha) {
-    WebPBlendAlpha(&pic1, 0x00000000);
-    WebPBlendAlpha(&pic2, 0x00000000);
-  }
-
-  if (!WebPPictureDistortion(&pic1, &pic2, type, disto)) {
-    fprintf(stderr, "Error while computing the distortion.\n");
-    goto End;
-  }
-  printf("%u %.2f    %.2f %.2f %.2f %.2f [ %.2f bpp ]\n",
-         (unsigned int)size1,
-         disto[4], disto[0], disto[1], disto[2], disto[3],
-         8.f * size1 / pic1.width / pic1.height);
-
-  if (output != NULL) {
-    uint8_t* data = NULL;
-    size_t data_size = 0;
-    if (pic1.use_argb != pic2.use_argb) {
-      fprintf(stderr, "Pictures are not in the same argb format. "
-                      "Can't save the difference map.\n");
-      goto End;
-    }
-    if (pic1.use_argb) {
-      int n;
-      fprintf(stderr, "max differences per channel: ");
-      for (n = 0; n < 3; ++n) {    // skip the alpha channel
-        const int range = (type == 1) ?
-          SSIMScaleChannel((uint8_t*)pic1.argb + n, pic1.argb_stride * 4,
-                           (const uint8_t*)pic2.argb + n, pic2.argb_stride * 4,
-                           4, pic1.width, pic1.height, scale) :
-          DiffScaleChannel((uint8_t*)pic1.argb + n, pic1.argb_stride * 4,
-                           (const uint8_t*)pic2.argb + n, pic2.argb_stride * 4,
-                           4, pic1.width, pic1.height, scale);
-        if (range < 0) fprintf(stderr, "\nError computing diff map\n");
-        fprintf(stderr, "[%d]", range);
-      }
-      fprintf(stderr, "\n");
-      if (use_gray) ConvertToGray(&pic1);
-    } else {
-      fprintf(stderr, "Can only compute the difference map in ARGB format.\n");
-      goto End;
-    }
-#if !defined(WEBP_REDUCE_CSP)
-    data_size = WebPEncodeLosslessBGRA((const uint8_t*)pic1.argb,
-                                       pic1.width, pic1.height,
-                                       pic1.argb_stride * 4,
-                                       &data);
-    if (data_size == 0) {
-      fprintf(stderr, "Error during lossless encoding.\n");
-      goto End;
-    }
-    ret = ImgIoUtilWriteFile(output, data, data_size) ? 0 : 1;
-    WebPFree(data);
-    if (ret) goto End;
-#else
-    (void)data;
-    (void)data_size;
-    fprintf(stderr, "Cannot save the difference map. Please recompile "
-                    "without the WEBP_REDUCE_CSP flag.\n");
-#endif  // WEBP_REDUCE_CSP
-  }
-  ret = 0;
-
- End:
-  WebPPictureFree(&pic1);
-  WebPPictureFree(&pic2);
-  FREE_WARGV_AND_RETURN(ret);
-}

external/libwebp/libwebp/extras/quality_estimate.c

@@ -1,129 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  VP8EstimateQuality(): rough encoding quality estimate
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include "extras/extras.h"
-#include "webp/decode.h"
-
-#include <math.h>
-
-//------------------------------------------------------------------------------
-
-#define INVALID_BIT_POS (1ull << 63)
-
-// In most cases, we don't need to use a full arithmetic decoder, since
-// all the header's bits are written using a uniform probability of 128.
-// We can just parse the header as if it was bits (works in 99.999% cases).
-static WEBP_INLINE uint32_t GetBit(const uint8_t* const data, size_t nb,
-                                   uint64_t max_size, uint64_t* const bit_pos) {
-  uint32_t val = 0;
-  if (*bit_pos + nb <= 8 * max_size) {
-    while (nb-- > 0) {
-      const uint64_t p = (*bit_pos)++;
-      const int bit = !!(data[p >> 3] & (128 >> ((p & 7))));
-      val = (val << 1) | bit;
-    }
-  } else {
-    *bit_pos = INVALID_BIT_POS;
-  }
-  return val;
-}
-
-#define GET_BIT(n) GetBit(data, (n), size, &bit_pos)
-#define CONDITIONAL_SKIP(n) (GET_BIT(1) ? GET_BIT((n)) : 0)
-
-int VP8EstimateQuality(const uint8_t* const data, size_t size) {
-  size_t pos = 0;
-  uint64_t bit_pos;
-  uint64_t sig = 0x00;
-  int ok = 0;
-  int Q = -1;
-  WebPBitstreamFeatures features;
-
-  if (data == NULL) return -1;
-
-  if (WebPGetFeatures(data, size, &features) != VP8_STATUS_OK) {
-    return -1;   // invalid file
-  }
-  if (features.format == 2) return 101;  // lossless
-  if (features.format == 0 || features.has_animation) return -1;   // mixed
-
-  while (pos < size) {
-    sig = (sig >> 8) | ((uint64_t)data[pos++] << 40);
-    if ((sig >> 24) == 0x2a019dull) {
-      ok = 1;
-      break;
-    }
-  }
-  if (!ok) return -1;
-  if (pos + 4 > size) return -1;
-
-  // Skip main Header
-  // width  = (data[pos + 0] | (data[pos + 1] << 8)) & 0x3fff;
-  // height = (data[pos + 2] | (data[pos + 3] << 8)) & 0x3fff;
-  pos += 4;
-  bit_pos = pos * 8;
-
-  GET_BIT(2);  // colorspace + clamp type
-
-  // Segment header
-  if (GET_BIT(1)) {       // use_segment_
-    int s;
-    const int update_map = GET_BIT(1);
-    if (GET_BIT(1)) {     // update data
-      const int absolute_delta = GET_BIT(1);
-      int q[4]  = { 0, 0, 0, 0 };
-      for (s = 0; s < 4; ++s) {
-        if (GET_BIT(1)) {
-          q[s] = GET_BIT(7);
-          if (GET_BIT(1)) q[s] = -q[s];   // sign
-        }
-      }
-      if (absolute_delta) Q = q[0];  // just use the first segment's quantizer
-      for (s = 0; s < 4; ++s) CONDITIONAL_SKIP(7);   //  filter strength
-    }
-    if (update_map) {
-      for (s = 0; s < 3; ++s) CONDITIONAL_SKIP(8);
-    }
-  }
-  // Filter header
-  GET_BIT(1 + 6 + 3);     // simple + level + sharpness
-  if (GET_BIT(1)) {       // use_lf_delta
-    if (GET_BIT(1)) {     // update lf_delta?
-      int n;
-      for (n = 0; n < 4 + 4; ++n) CONDITIONAL_SKIP(6);
-    }
-  }
-  // num partitions
-  GET_BIT(2);
-
-  // ParseQuant
-  {
-    const int base_q = GET_BIT(7);
-    /* dqy1_dc = */ CONDITIONAL_SKIP(5);
-    /* dqy2_dc = */ CONDITIONAL_SKIP(5);
-    /* dqy2_ac = */ CONDITIONAL_SKIP(5);
-    /* dquv_dc = */ CONDITIONAL_SKIP(5);
-    /* dquv_ac = */ CONDITIONAL_SKIP(5);
-
-    if (Q < 0) Q = base_q;
-  }
-  if (bit_pos == INVALID_BIT_POS) return -1;
-
-  // base mapping
-  Q = (127 - Q) * 100 / 127;
-  // correction for power-law behavior in low range
-  if (Q < 80) {
-    Q = (int)(pow(Q / 80., 1. / 0.38) * 80);
-  }
-  return Q;
-}

external/libwebp/libwebp/extras/vwebp_sdl.c

@@ -1,101 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Simple SDL-based WebP file viewer.
-// Does not support animation, just static images.
-//
-// Press 'q' to exit.
-//
-// Author: James Zern (jzern@google.com)
-
-#include <stdio.h>
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#if defined(WEBP_HAVE_SDL)
-
-#include "webp_to_sdl.h"
-#include "webp/decode.h"
-#include "imageio/imageio_util.h"
-#include "../examples/unicode.h"
-
-#if defined(WEBP_HAVE_JUST_SDL_H)
-#include <SDL.h>
-#else
-#include <SDL/SDL.h>
-#endif
-
-static void ProcessEvents(void) {
-  int done = 0;
-  SDL_Event event;
-  while (!done && SDL_WaitEvent(&event)) {
-    switch (event.type) {
-      case SDL_KEYUP:
-        switch (event.key.keysym.sym) {
-          case SDLK_q: done = 1; break;
-          default: break;
-        }
-        break;
-      default: break;
-    }
-  }
-}
-
-int main(int argc, char* argv[]) {
-  int c;
-  int ok = 0;
-
-  INIT_WARGV(argc, argv);
-
-  for (c = 1; c < argc; ++c) {
-    const char* file = NULL;
-    const uint8_t* webp = NULL;
-    size_t webp_size = 0;
-    if (!strcmp(argv[c], "-h")) {
-      printf("Usage: %s [-h] image.webp [more_files.webp...]\n", argv[0]);
-      FREE_WARGV_AND_RETURN(0);
-    } else {
-      file = (const char*)GET_WARGV(argv, c);
-    }
-    if (file == NULL) continue;
-    if (!ImgIoUtilReadFile(file, &webp, &webp_size)) {
-      WFPRINTF(stderr, "Error opening file: %s\n", (const W_CHAR*)file);
-      goto Error;
-    }
-    if (webp_size != (size_t)(int)webp_size) {
-      free((void*)webp);
-      fprintf(stderr, "File too large.\n");
-      goto Error;
-    }
-    ok = WebPToSDL((const char*)webp, (int)webp_size);
-    free((void*)webp);
-    if (!ok) {
-      WFPRINTF(stderr, "Error decoding file %s\n", (const W_CHAR*)file);
-      goto Error;
-    }
-    ProcessEvents();
-  }
-  ok = 1;
-
- Error:
-  SDL_Quit();
-  FREE_WARGV_AND_RETURN(ok ? 0 : 1);
-}
-
-#else  // !WEBP_HAVE_SDL
-
-int main(int argc, const char* argv[]) {
-  fprintf(stderr, "SDL support not enabled in %s.\n", argv[0]);
-  (void)argc;
-  return 0;
-}
-
-#endif

external/libwebp/libwebp/extras/webp_quality.c

@@ -1,54 +0,0 @@
-// Simple tool to roughly evaluate the quality encoding of a webp bitstream
-//
-// Result is a *rough* estimation of the quality. You should just consider
-// the bucket it's in (q > 80? > 50? > 20?) and not take it for face value.
-/*
- gcc -o webp_quality webp_quality.c -O3 -I../ -L. -L../imageio \
-    -limageio_util -lwebpextras -lwebp -lm -lpthread
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "extras/extras.h"
-#include "imageio/imageio_util.h"
-#include "../examples/unicode.h"
-
-int main(int argc, const char* argv[]) {
-  int c;
-  int quiet = 0;
-  int ok = 1;
-
-  INIT_WARGV(argc, argv);
-
-  for (c = 1; ok && c < argc; ++c) {
-    if (!strcmp(argv[c], "-quiet")) {
-      quiet = 1;
-    } else if (!strcmp(argv[c], "-help") || !strcmp(argv[c], "-h")) {
-      printf("webp_quality [-h][-quiet] webp_files...\n");
-      FREE_WARGV_AND_RETURN(0);
-    } else {
-      const char* const filename = (const char*)GET_WARGV(argv, c);
-      const uint8_t* data = NULL;
-      size_t data_size = 0;
-      int q;
-      ok = ImgIoUtilReadFile(filename, &data, &data_size);
-      if (!ok) break;
-      q = VP8EstimateQuality(data, data_size);
-      if (!quiet) WPRINTF("[%s] ", (const W_CHAR*)filename);
-      if (q < 0) {
-        fprintf(stderr, "Not a WebP file, or not a lossy WebP file.\n");
-        ok = 0;
-      } else {
-        if (!quiet) {
-          printf("Estimated quality factor: %d\n", q);
-        } else {
-          printf("%d\n", q);   // just print the number
-        }
-      }
-      free((void*)data);
-    }
-  }
-  FREE_WARGV_AND_RETURN(ok ? 0 : 1);
-}

external/libwebp/libwebp/extras/webp_to_sdl.c

@@ -1,110 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Simple WebP-to-SDL wrapper. Useful for emscripten.
-//
-// Author: James Zern (jzern@google.com)
-
-#ifdef HAVE_CONFIG_H
-#include "src/webp/config.h"
-#endif
-
-#if defined(WEBP_HAVE_SDL)
-
-#include "webp_to_sdl.h"
-
-#include <stdio.h>
-#include "src/webp/decode.h"
-
-#if defined(WEBP_HAVE_JUST_SDL_H)
-#include <SDL.h>
-#else
-#include <SDL/SDL.h>
-#endif
-
-static int init_ok = 0;
-int WebPToSDL(const char* data, unsigned int data_size) {
-  int ok = 0;
-  VP8StatusCode status;
-  WebPDecoderConfig config;
-  WebPBitstreamFeatures* const input = &config.input;
-  WebPDecBuffer* const output = &config.output;
-  SDL_Surface* screen = NULL;
-  SDL_Surface* surface = NULL;
-
-  if (!WebPInitDecoderConfig(&config)) {
-    fprintf(stderr, "Library version mismatch!\n");
-    return 0;
-  }
-
-  if (!init_ok) {
-    SDL_Init(SDL_INIT_VIDEO);
-    init_ok = 1;
-  }
-
-  status = WebPGetFeatures((uint8_t*)data, (size_t)data_size, &config.input);
-  if (status != VP8_STATUS_OK) goto Error;
-
-  screen = SDL_SetVideoMode(input->width, input->height, 32, SDL_SWSURFACE);
-  if (screen == NULL) {
-    fprintf(stderr, "Unable to set video mode (32bpp %dx%d)!\n",
-            input->width, input->height);
-    goto Error;
-  }
-
-  surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
-                                 input->width, input->height, 32,
-                                 0x000000ffu,   // R mask
-                                 0x0000ff00u,   // G mask
-                                 0x00ff0000u,   // B mask
-                                 0xff000000u);  // A mask
-
-  if (surface == NULL) {
-    fprintf(stderr, "Unable to create %dx%d RGBA surface!\n",
-            input->width, input->height);
-    goto Error;
-  }
-  if (SDL_MUSTLOCK(surface)) SDL_LockSurface(surface);
-
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
-  output->colorspace = MODE_BGRA;
-#else
-  output->colorspace = MODE_RGBA;
-#endif
-  output->width  = surface->w;
-  output->height = surface->h;
-  output->u.RGBA.rgba   = surface->pixels;
-  output->u.RGBA.stride = surface->pitch;
-  output->u.RGBA.size   = surface->pitch * surface->h;
-  output->is_external_memory = 1;
-
-  status = WebPDecode((const uint8_t*)data, (size_t)data_size, &config);
-  if (status != VP8_STATUS_OK) {
-    fprintf(stderr, "Error decoding image (%d)\n", status);
-    goto Error;
-  }
-
-  if (SDL_MUSTLOCK(surface)) SDL_UnlockSurface(surface);
-  if (SDL_BlitSurface(surface, NULL, screen, NULL) ||
-      SDL_Flip(screen)) {
-    goto Error;
-  }
-
-  ok = 1;
-
- Error:
-  SDL_FreeSurface(surface);
-  SDL_FreeSurface(screen);
-  WebPFreeDecBuffer(output);
-  return ok;
-}
-
-//------------------------------------------------------------------------------
-
-#endif  // WEBP_HAVE_SDL

external/libwebp/libwebp/extras/webp_to_sdl.h

@@ -1,22 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Simple WebP-to-SDL wrapper. Useful for emscripten.
-//
-// Author: James Zern (jzern@google.com)
-
-#ifndef WEBP_EXTRAS_WEBP_TO_SDL_H_
-#define WEBP_EXTRAS_WEBP_TO_SDL_H_
-
-// Exports the method WebPToSDL(const char* data, int data_size) which decodes
-// a WebP bitstream into an RGBA SDL surface.
-// Return false on failure.
-extern int WebPToSDL(const char* data, unsigned int data_size);
-
-#endif  // WEBP_EXTRAS_WEBP_TO_SDL_H_

external/libwebp/libwebp/gradle.properties

@@ -1,14 +0,0 @@
-# Project-wide Gradle settings.
-
-# IDE (e.g. Android Studio) users:
-# Gradle settings configured through the IDE *will override*
-# any settings specified in this file.
-
-# For more details on how to configure your build environment visit
-# http://www.gradle.org/docs/current/userguide/build_environment.html
-
-# Versions for gradle
-BUILD_TOOLS_VERSION=23.0.3
-COMPILE_SDK_VERSION=23
-ANDROID_GRADLE_PLUGIN_VERSION=1.5.0
-GRADLE_DOWNLOAD_TASK_VERSION=2.1.0

external/libwebp/libwebp/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-bin.zip
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists

external/libwebp/libwebp/gradlew

@@ -1,183 +0,0 @@
-#!/usr/bin/env sh
-
-#
-# Copyright 2015 the original author or authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-##############################################################################
-##
-##  Gradle start up script for UN*X
-##
-##############################################################################
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn () {
-    echo "$*"
-}
-
-die () {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
-esac
-
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
-
-# Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
-    if [ ! -x "$JAVACMD" ] ; then
-        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-    fi
-else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-fi
-
-# Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=`expr $i + 1`
-    done
-    case $i in
-        0) set -- ;;
-        1) set -- "$args0" ;;
-        2) set -- "$args0" "$args1" ;;
-        3) set -- "$args0" "$args1" "$args2" ;;
-        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
-fi
-
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=`save "$@"`
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-exec "$JAVACMD" "$@"

external/libwebp/libwebp/gradlew.bat

@@ -1,100 +0,0 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega

external/libwebp/libwebp/imageio/Android.mk

@@ -1,57 +0,0 @@
-# Ignore this file during non-NDK builds.
-ifdef NDK_ROOT
-LOCAL_PATH := $(call my-dir)
-
-################################################################################
-# libimageio_util
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    imageio_util.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
-
-LOCAL_MODULE := imageio_util
-
-include $(BUILD_STATIC_LIBRARY)
-
-################################################################################
-# libimagedec
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    image_dec.c \
-    jpegdec.c \
-    metadata.c \
-    pngdec.c \
-    pnmdec.c \
-    tiffdec.c \
-    webpdec.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
-LOCAL_STATIC_LIBRARIES := imageio_util
-
-LOCAL_MODULE := imagedec
-
-include $(BUILD_STATIC_LIBRARY)
-
-################################################################################
-# libimageenc
-
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    image_enc.c \
-
-LOCAL_CFLAGS := $(WEBP_CFLAGS)
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
-LOCAL_STATIC_LIBRARIES := imageio_util
-
-LOCAL_MODULE := imageenc
-
-include $(BUILD_STATIC_LIBRARY)
-endif  # NDK_ROOT

external/libwebp/libwebp/imageio/Makefile.am

@@ -1,32 +0,0 @@
-AM_CPPFLAGS += -I$(top_builddir)/src -I$(top_srcdir)/src
-noinst_LTLIBRARIES =
-noinst_LTLIBRARIES += libimageio_util.la
-if BUILD_DEMUX
-  noinst_LTLIBRARIES += libimagedec.la
-endif
-noinst_LTLIBRARIES += libimageenc.la
-
-noinst_HEADERS =
-noinst_HEADERS += ../src/webp/decode.h
-noinst_HEADERS += ../src/webp/types.h
-
-libimageio_util_la_SOURCES =
-libimageio_util_la_SOURCES += imageio_util.c imageio_util.h
-
-libimagedec_la_SOURCES  =
-libimagedec_la_SOURCES += image_dec.c image_dec.h
-libimagedec_la_SOURCES += jpegdec.c jpegdec.h
-libimagedec_la_SOURCES += metadata.c metadata.h
-libimagedec_la_SOURCES += pngdec.c pngdec.h
-libimagedec_la_SOURCES += pnmdec.c pnmdec.h
-libimagedec_la_SOURCES += tiffdec.c tiffdec.h
-libimagedec_la_SOURCES += webpdec.c webpdec.h
-libimagedec_la_SOURCES += wicdec.c wicdec.h
-libimagedec_la_CPPFLAGS = $(JPEG_INCLUDES) $(PNG_INCLUDES) $(TIFF_INCLUDES)
-libimagedec_la_CPPFLAGS += $(AM_CPPFLAGS)
-libimagedec_la_LIBADD = ../src/demux/libwebpdemux.la
-
-libimageenc_la_SOURCES  =
-libimageenc_la_SOURCES += image_enc.c image_enc.h
-libimageenc_la_CPPFLAGS = $(JPEG_INCLUDES) $(PNG_INCLUDES) $(TIFF_INCLUDES)
-libimageenc_la_CPPFLAGS += $(AM_CPPFLAGS)

external/libwebp/libwebp/imageio/image_dec.c

@@ -1,84 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Generic image-type guessing.
-
-#include "./image_dec.h"
-
-const char* WebPGetEnabledInputFileFormats(void) {
-  return "WebP"
-#ifdef WEBP_HAVE_JPEG
-         ", JPEG"
-#endif
-#ifdef WEBP_HAVE_PNG
-         ", PNG"
-#endif
-         ", PNM (PGM, PPM, PAM)"
-#ifdef WEBP_HAVE_TIFF
-         ", TIFF"
-#endif
-#ifdef HAVE_WINCODEC_H
-         ", Windows Imaging Component (WIC)"
-#endif
-         "";
-}
-
-static WEBP_INLINE uint32_t GetBE32(const uint8_t buf[]) {
-  return ((uint32_t)buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
-}
-
-WebPInputFileFormat WebPGuessImageType(const uint8_t* const data,
-                                       size_t data_size) {
-  WebPInputFileFormat format = WEBP_UNSUPPORTED_FORMAT;
-  if (data != NULL && data_size >= 12) {
-    const uint32_t magic1 = GetBE32(data + 0);
-    const uint32_t magic2 = GetBE32(data + 8);
-    if (magic1 == 0x89504E47U) {
-      format = WEBP_PNG_FORMAT;
-    } else if (magic1 >= 0xFFD8FF00U && magic1 <= 0xFFD8FFFFU) {
-      format = WEBP_JPEG_FORMAT;
-    } else if (magic1 == 0x49492A00 || magic1 == 0x4D4D002A) {
-      format = WEBP_TIFF_FORMAT;
-    } else if (magic1 == 0x52494646 && magic2 == 0x57454250) {
-      format = WEBP_WEBP_FORMAT;
-    } else if (((magic1 >> 24) & 0xff) == 'P') {
-      const int type = (magic1 >> 16) & 0xff;
-      // we only support 'P5 -> P7' for now.
-      if (type >= '5' && type <= '7') format = WEBP_PNM_FORMAT;
-    }
-  }
-  return format;
-}
-
-static int FailReader(const uint8_t* const data, size_t data_size,
-                      struct WebPPicture* const pic,
-                      int keep_alpha, struct Metadata* const metadata) {
-  (void)data;
-  (void)data_size;
-  (void)pic;
-  (void)keep_alpha;
-  (void)metadata;
-  return 0;
-}
-
-WebPImageReader WebPGetImageReader(WebPInputFileFormat format) {
-  switch (format) {
-    case WEBP_PNG_FORMAT: return ReadPNG;
-    case WEBP_JPEG_FORMAT: return ReadJPEG;
-    case WEBP_TIFF_FORMAT: return ReadTIFF;
-    case WEBP_WEBP_FORMAT: return ReadWebP;
-    case WEBP_PNM_FORMAT: return ReadPNM;
-    default: return FailReader;
-  }
-}
-
-WebPImageReader WebPGuessImageReader(const uint8_t* const data,
-                                     size_t data_size) {
-  return WebPGetImageReader(WebPGuessImageType(data, data_size));
-}

external/libwebp/libwebp/imageio/image_dec.h

@@ -1,70 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  All-in-one library to decode PNG/JPEG/WebP/TIFF/WIC input images.
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#ifndef WEBP_IMAGEIO_IMAGE_DEC_H_
-#define WEBP_IMAGEIO_IMAGE_DEC_H_
-
-#include "webp/types.h"
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include "./metadata.h"
-#include "./jpegdec.h"
-#include "./pngdec.h"
-#include "./pnmdec.h"
-#include "./tiffdec.h"
-#include "./webpdec.h"
-#include "./wicdec.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
-  WEBP_PNG_FORMAT = 0,
-  WEBP_JPEG_FORMAT,
-  WEBP_TIFF_FORMAT,
-  WEBP_WEBP_FORMAT,
-  WEBP_PNM_FORMAT,
-  WEBP_UNSUPPORTED_FORMAT
-} WebPInputFileFormat;
-
-// Returns a comma separated list of enabled input formats.
-const char* WebPGetEnabledInputFileFormats(void);
-
-// Try to infer the image format. 'data_size' should be larger than 12.
-// Returns WEBP_UNSUPPORTED_FORMAT if format can't be guess safely.
-WebPInputFileFormat WebPGuessImageType(const uint8_t* const data,
-                                       size_t data_size);
-
-// Signature for common image-reading functions (ReadPNG, ReadJPEG, ...)
-typedef int (*WebPImageReader)(const uint8_t* const data, size_t data_size,
-                               struct WebPPicture* const pic,
-                               int keep_alpha, struct Metadata* const metadata);
-
-// Return the reader associated to a given file format.
-WebPImageReader WebPGetImageReader(WebPInputFileFormat format);
-
-// This function is similar to WebPGuessImageType(), but returns a
-// suitable reader function. The returned reader is never NULL, but
-// unknown formats will return an always-failing valid reader.
-WebPImageReader WebPGuessImageReader(const uint8_t* const data,
-                                     size_t data_size);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_IMAGE_DEC_H_

external/libwebp/libwebp/imageio/image_enc.c

@@ -1,615 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Save image
-
-#include "./image_enc.h"
-
-#include <assert.h>
-#include <string.h>
-
-#ifdef WEBP_HAVE_PNG
-#include <png.h>
-#include <setjmp.h>   // note: this must be included *after* png.h
-#endif
-
-#ifdef HAVE_WINCODEC_H
-#ifdef __MINGW32__
-#define INITGUID  // Without this GUIDs are declared extern and fail to link
-#endif
-#define CINTERFACE
-#define COBJMACROS
-#define _WIN32_IE 0x500  // Workaround bug in shlwapi.h when compiling C++
-                         // code with COBJMACROS.
-#include <ole2.h>  // CreateStreamOnHGlobal()
-#include <shlwapi.h>
-#include <tchar.h>
-#include <windows.h>
-#include <wincodec.h>
-#endif
-
-#include "./imageio_util.h"
-#include "../examples/unicode.h"
-
-//------------------------------------------------------------------------------
-// PNG
-
-#ifdef HAVE_WINCODEC_H
-
-#define IFS(fn)                                                     \
-  do {                                                              \
-    if (SUCCEEDED(hr)) {                                            \
-      hr = (fn);                                                    \
-      if (FAILED(hr)) fprintf(stderr, #fn " failed %08lx\n", hr);   \
-    }                                                               \
-  } while (0)
-
-#ifdef __cplusplus
-#define MAKE_REFGUID(x) (x)
-#else
-#define MAKE_REFGUID(x) &(x)
-#endif
-
-static HRESULT CreateOutputStream(const char* out_file_name,
-                                  int write_to_mem, IStream** stream) {
-  HRESULT hr = S_OK;
-  if (write_to_mem) {
-    // Output to a memory buffer. This is freed when 'stream' is released.
-    IFS(CreateStreamOnHGlobal(NULL, TRUE, stream));
-  } else {
-    IFS(SHCreateStreamOnFile((const LPTSTR)out_file_name,
-                             STGM_WRITE | STGM_CREATE, stream));
-  }
-  if (FAILED(hr)) {
-    _ftprintf(stderr, _T("Error opening output file %s (%08lx)\n"),
-              (const LPTSTR)out_file_name, hr);
-  }
-  return hr;
-}
-
-static HRESULT WriteUsingWIC(const char* out_file_name, int use_stdout,
-                             REFGUID container_guid,
-                             uint8_t* rgb, int stride,
-                             uint32_t width, uint32_t height, int has_alpha) {
-  HRESULT hr = S_OK;
-  IWICImagingFactory* factory = NULL;
-  IWICBitmapFrameEncode* frame = NULL;
-  IWICBitmapEncoder* encoder = NULL;
-  IStream* stream = NULL;
-  WICPixelFormatGUID pixel_format = has_alpha ? GUID_WICPixelFormat32bppBGRA
-                                              : GUID_WICPixelFormat24bppBGR;
-
-  if (out_file_name == NULL || rgb == NULL) return E_INVALIDARG;
-
-  IFS(CoInitialize(NULL));
-  IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
-                       CLSCTX_INPROC_SERVER,
-                       MAKE_REFGUID(IID_IWICImagingFactory),
-                       (LPVOID*)&factory));
-  if (hr == REGDB_E_CLASSNOTREG) {
-    fprintf(stderr,
-            "Couldn't access Windows Imaging Component (are you running "
-            "Windows XP SP3 or newer?). PNG support not available. "
-            "Use -ppm or -pgm for available PPM and PGM formats.\n");
-  }
-  IFS(CreateOutputStream(out_file_name, use_stdout, &stream));
-  IFS(IWICImagingFactory_CreateEncoder(factory, container_guid, NULL,
-                                       &encoder));
-  IFS(IWICBitmapEncoder_Initialize(encoder, stream,
-                                   WICBitmapEncoderNoCache));
-  IFS(IWICBitmapEncoder_CreateNewFrame(encoder, &frame, NULL));
-  IFS(IWICBitmapFrameEncode_Initialize(frame, NULL));
-  IFS(IWICBitmapFrameEncode_SetSize(frame, width, height));
-  IFS(IWICBitmapFrameEncode_SetPixelFormat(frame, &pixel_format));
-  IFS(IWICBitmapFrameEncode_WritePixels(frame, height, stride,
-                                        height * stride, rgb));
-  IFS(IWICBitmapFrameEncode_Commit(frame));
-  IFS(IWICBitmapEncoder_Commit(encoder));
-
-  if (SUCCEEDED(hr) && use_stdout) {
-    HGLOBAL image;
-    IFS(GetHGlobalFromStream(stream, &image));
-    if (SUCCEEDED(hr)) {
-      HANDLE std_output = GetStdHandle(STD_OUTPUT_HANDLE);
-      DWORD mode;
-      const BOOL update_mode = GetConsoleMode(std_output, &mode);
-      const void* const image_mem = GlobalLock(image);
-      DWORD bytes_written = 0;
-
-      // Clear output processing if necessary, then output the image.
-      if (update_mode) SetConsoleMode(std_output, 0);
-      if (!WriteFile(std_output, image_mem, (DWORD)GlobalSize(image),
-                     &bytes_written, NULL) ||
-          bytes_written != GlobalSize(image)) {
-        hr = E_FAIL;
-      }
-      if (update_mode) SetConsoleMode(std_output, mode);
-      GlobalUnlock(image);
-    }
-  }
-
-  if (frame != NULL) IUnknown_Release(frame);
-  if (encoder != NULL) IUnknown_Release(encoder);
-  if (factory != NULL) IUnknown_Release(factory);
-  if (stream != NULL) IUnknown_Release(stream);
-  return hr;
-}
-
-int WebPWritePNG(const char* out_file_name, int use_stdout,
-                 const WebPDecBuffer* const buffer) {
-  const uint32_t width = buffer->width;
-  const uint32_t height = buffer->height;
-  uint8_t* const rgb = buffer->u.RGBA.rgba;
-  const int stride = buffer->u.RGBA.stride;
-  const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
-
-  return SUCCEEDED(WriteUsingWIC(out_file_name, use_stdout,
-                                 MAKE_REFGUID(GUID_ContainerFormatPng),
-                                 rgb, stride, width, height, has_alpha));
-}
-
-#elif defined(WEBP_HAVE_PNG)    // !HAVE_WINCODEC_H
-static void PNGAPI PNGErrorFunction(png_structp png, png_const_charp unused) {
-  (void)unused;  // remove variable-unused warning
-  longjmp(png_jmpbuf(png), 1);
-}
-
-int WebPWritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
-  volatile png_structp png;
-  volatile png_infop info;
-
-  if (out_file == NULL || buffer == NULL) return 0;
-
-  png = png_create_write_struct(PNG_LIBPNG_VER_STRING,
-                                NULL, PNGErrorFunction, NULL);
-  if (png == NULL) {
-    return 0;
-  }
-  info = png_create_info_struct(png);
-  if (info == NULL) {
-    png_destroy_write_struct((png_structpp)&png, NULL);
-    return 0;
-  }
-  if (setjmp(png_jmpbuf(png))) {
-    png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
-    return 0;
-  }
-  png_init_io(png, out_file);
-  {
-    const uint32_t width = buffer->width;
-    const uint32_t height = buffer->height;
-    png_bytep row = buffer->u.RGBA.rgba;
-    const int stride = buffer->u.RGBA.stride;
-    const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
-    uint32_t y;
-
-    png_set_IHDR(png, info, width, height, 8,
-                 has_alpha ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB,
-                 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
-                 PNG_FILTER_TYPE_DEFAULT);
-    png_write_info(png, info);
-    for (y = 0; y < height; ++y) {
-      png_write_rows(png, &row, 1);
-      row += stride;
-    }
-  }
-  png_write_end(png, info);
-  png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
-  return 1;
-}
-#else    // !HAVE_WINCODEC_H && !WEBP_HAVE_PNG
-int WebPWritePNG(FILE* fout, const WebPDecBuffer* const buffer) {
-  if (fout == NULL || buffer == NULL) return 0;
-
-  fprintf(stderr, "PNG support not compiled. Please install the libpng "
-          "development package before building.\n");
-  fprintf(stderr, "You can run with -ppm flag to decode in PPM format.\n");
-  return 0;
-}
-#endif
-
-//------------------------------------------------------------------------------
-// PPM / PAM
-
-static int WritePPMPAM(FILE* fout, const WebPDecBuffer* const buffer,
-                       int alpha) {
-  if (fout == NULL || buffer == NULL) {
-    return 0;
-  } else {
-    const uint32_t width = buffer->width;
-    const uint32_t height = buffer->height;
-    const uint8_t* row = buffer->u.RGBA.rgba;
-    const int stride = buffer->u.RGBA.stride;
-    const size_t bytes_per_px = alpha ? 4 : 3;
-    uint32_t y;
-
-    if (row == NULL) return 0;
-
-    if (alpha) {
-      fprintf(fout, "P7\nWIDTH %u\nHEIGHT %u\nDEPTH 4\nMAXVAL 255\n"
-                    "TUPLTYPE RGB_ALPHA\nENDHDR\n", width, height);
-    } else {
-      fprintf(fout, "P6\n%u %u\n255\n", width, height);
-    }
-    for (y = 0; y < height; ++y) {
-      if (fwrite(row, width, bytes_per_px, fout) != bytes_per_px) {
-        return 0;
-      }
-      row += stride;
-    }
-  }
-  return 1;
-}
-
-int WebPWritePPM(FILE* fout, const WebPDecBuffer* const buffer) {
-  return WritePPMPAM(fout, buffer, 0);
-}
-
-int WebPWritePAM(FILE* fout, const WebPDecBuffer* const buffer) {
-  return WritePPMPAM(fout, buffer, 1);
-}
-
-//------------------------------------------------------------------------------
-// Raw PGM
-
-// Save 16b mode (RGBA4444, RGB565, ...) for debugging purpose.
-int WebPWrite16bAsPGM(FILE* fout, const WebPDecBuffer* const buffer) {
-  const uint32_t width = buffer->width;
-  const uint32_t height = buffer->height;
-  const uint8_t* rgba = buffer->u.RGBA.rgba;
-  const int stride = buffer->u.RGBA.stride;
-  const uint32_t bytes_per_px = 2;
-  uint32_t y;
-
-  if (fout == NULL || buffer == NULL || rgba == NULL) return 0;
-
-  fprintf(fout, "P5\n%u %u\n255\n", width * bytes_per_px, height);
-  for (y = 0; y < height; ++y) {
-    if (fwrite(rgba, width, bytes_per_px, fout) != bytes_per_px) {
-      return 0;
-    }
-    rgba += stride;
-  }
-  return 1;
-}
-
-//------------------------------------------------------------------------------
-// BMP (see https://en.wikipedia.org/wiki/BMP_file_format#Pixel_storage)
-
-static void PutLE16(uint8_t* const dst, uint32_t value) {
-  dst[0] = (value >> 0) & 0xff;
-  dst[1] = (value >> 8) & 0xff;
-}
-
-static void PutLE32(uint8_t* const dst, uint32_t value) {
-  PutLE16(dst + 0, (value >>  0) & 0xffff);
-  PutLE16(dst + 2, (value >> 16) & 0xffff);
-}
-
-#define BMP_HEADER_SIZE 54
-#define BMP_HEADER_ALPHA_EXTRA_SIZE 16  // for alpha info
-int WebPWriteBMP(FILE* fout, const WebPDecBuffer* const buffer) {
-  const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
-  const int header_size =
-      BMP_HEADER_SIZE + (has_alpha ? BMP_HEADER_ALPHA_EXTRA_SIZE : 0);
-  const uint32_t width = buffer->width;
-  const uint32_t height = buffer->height;
-  const uint8_t* rgba = buffer->u.RGBA.rgba;
-  const int stride = buffer->u.RGBA.stride;
-  const uint32_t bytes_per_px = has_alpha ? 4 : 3;
-  uint32_t y;
-  const uint32_t line_size = bytes_per_px * width;
-  const uint32_t bmp_stride = (line_size + 3) & ~3;   // pad to 4
-  const uint32_t image_size = bmp_stride * height;
-  const uint32_t total_size =  image_size + header_size;
-  uint8_t bmp_header[BMP_HEADER_SIZE + BMP_HEADER_ALPHA_EXTRA_SIZE] = { 0 };
-
-  if (fout == NULL || buffer == NULL || rgba == NULL) return 0;
-
-  // bitmap file header
-  PutLE16(bmp_header + 0, 0x4d42);                // signature 'BM'
-  PutLE32(bmp_header + 2, total_size);            // size including header
-  PutLE32(bmp_header + 6, 0);                     // reserved
-  PutLE32(bmp_header + 10, header_size);          // offset to pixel array
-  // bitmap info header
-  PutLE32(bmp_header + 14, header_size - 14);     // DIB header size
-  PutLE32(bmp_header + 18, width);                // dimensions
-  PutLE32(bmp_header + 22, height);               // no vertical flip
-  PutLE16(bmp_header + 26, 1);                    // number of planes
-  PutLE16(bmp_header + 28, bytes_per_px * 8);     // bits per pixel
-  PutLE32(bmp_header + 30, has_alpha ? 3 : 0);    // BI_BITFIELDS or BI_RGB
-  PutLE32(bmp_header + 34, image_size);
-  PutLE32(bmp_header + 38, 2400);                 // x pixels/meter
-  PutLE32(bmp_header + 42, 2400);                 // y pixels/meter
-  PutLE32(bmp_header + 46, 0);                    // number of palette colors
-  PutLE32(bmp_header + 50, 0);                    // important color count
-  if (has_alpha) {  // BITMAPV3INFOHEADER complement
-    PutLE32(bmp_header + 54, 0x00ff0000);         // red mask
-    PutLE32(bmp_header + 58, 0x0000ff00);         // green mask
-    PutLE32(bmp_header + 62, 0x000000ff);         // blue mask
-    PutLE32(bmp_header + 66, 0xff000000);         // alpha mask
-  }
-
-  // TODO(skal): color profile
-
-  // write header
-  if (fwrite(bmp_header, header_size, 1, fout) != 1) {
-    return 0;
-  }
-
-  // write pixel array, bottom to top
-  for (y = 0; y < height; ++y) {
-    const uint8_t* const src = &rgba[(uint64_t)(height - 1 - y) * stride];
-    if (fwrite(src, line_size, 1, fout) != 1) {
-      return 0;
-    }
-    // write padding zeroes
-    if (bmp_stride != line_size) {
-      const uint8_t zeroes[3] = { 0 };
-      if (fwrite(zeroes, bmp_stride - line_size, 1, fout) != 1) {
-        return 0;
-      }
-    }
-  }
-  return 1;
-}
-#undef BMP_HEADER_SIZE
-#undef BMP_HEADER_ALPHA_EXTRA_SIZE
-
-//------------------------------------------------------------------------------
-// TIFF
-
-#define NUM_IFD_ENTRIES 15
-#define EXTRA_DATA_SIZE 16
-// 10b for signature/header + n * 12b entries + 4b for IFD terminator:
-#define EXTRA_DATA_OFFSET (10 + 12 * NUM_IFD_ENTRIES + 4)
-#define TIFF_HEADER_SIZE (EXTRA_DATA_OFFSET + EXTRA_DATA_SIZE)
-
-int WebPWriteTIFF(FILE* fout, const WebPDecBuffer* const buffer) {
-  const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
-  const uint32_t width = buffer->width;
-  const uint32_t height = buffer->height;
-  const uint8_t* rgba = buffer->u.RGBA.rgba;
-  const int stride = buffer->u.RGBA.stride;
-  const uint8_t bytes_per_px = has_alpha ? 4 : 3;
-  const uint8_t assoc_alpha =
-      WebPIsPremultipliedMode(buffer->colorspace) ? 1 : 2;
-  // For non-alpha case, we omit tag 0x152 (ExtraSamples).
-  const uint8_t num_ifd_entries = has_alpha ? NUM_IFD_ENTRIES
-                                            : NUM_IFD_ENTRIES - 1;
-  uint8_t tiff_header[TIFF_HEADER_SIZE] = {
-    0x49, 0x49, 0x2a, 0x00,   // little endian signature
-    8, 0, 0, 0,               // offset to the unique IFD that follows
-    // IFD (offset = 8). Entries must be written in increasing tag order.
-    num_ifd_entries, 0,       // Number of entries in the IFD (12 bytes each).
-    0x00, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0,    //  10: Width  (TBD)
-    0x01, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0,    //  22: Height (TBD)
-    0x02, 0x01, 3, 0, bytes_per_px, 0, 0, 0,     //  34: BitsPerSample: 8888
-        EXTRA_DATA_OFFSET + 0, 0, 0, 0,
-    0x03, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0,    //  46: Compression: none
-    0x06, 0x01, 3, 0, 1, 0, 0, 0, 2, 0, 0, 0,    //  58: Photometric: RGB
-    0x11, 0x01, 4, 0, 1, 0, 0, 0,                //  70: Strips offset:
-        TIFF_HEADER_SIZE, 0, 0, 0,               //      data follows header
-    0x12, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0,    //  82: Orientation: topleft
-    0x15, 0x01, 3, 0, 1, 0, 0, 0,                //  94: SamplesPerPixels
-        bytes_per_px, 0, 0, 0,
-    0x16, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0,    // 106: Rows per strip (TBD)
-    0x17, 0x01, 4, 0, 1, 0, 0, 0, 0, 0, 0, 0,    // 118: StripByteCount (TBD)
-    0x1a, 0x01, 5, 0, 1, 0, 0, 0,                // 130: X-resolution
-        EXTRA_DATA_OFFSET + 8, 0, 0, 0,
-    0x1b, 0x01, 5, 0, 1, 0, 0, 0,                // 142: Y-resolution
-        EXTRA_DATA_OFFSET + 8, 0, 0, 0,
-    0x1c, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0,    // 154: PlanarConfiguration
-    0x28, 0x01, 3, 0, 1, 0, 0, 0, 2, 0, 0, 0,    // 166: ResolutionUnit (inch)
-    0x52, 0x01, 3, 0, 1, 0, 0, 0,
-        assoc_alpha, 0, 0, 0,                    // 178: ExtraSamples: rgbA/RGBA
-    0, 0, 0, 0,                                  // 190: IFD terminator
-    // EXTRA_DATA_OFFSET:
-    8, 0, 8, 0, 8, 0, 8, 0,      // BitsPerSample
-    72, 0, 0, 0, 1, 0, 0, 0      // 72 pixels/inch, for X/Y-resolution
-  };
-  uint32_t y;
-
-  if (fout == NULL || buffer == NULL || rgba == NULL) return 0;
-
-  // Fill placeholders in IFD:
-  PutLE32(tiff_header + 10 + 8, width);
-  PutLE32(tiff_header + 22 + 8, height);
-  PutLE32(tiff_header + 106 + 8, height);
-  PutLE32(tiff_header + 118 + 8, width * bytes_per_px * height);
-  if (!has_alpha) PutLE32(tiff_header + 178, 0);  // IFD terminator
-
-  // write header
-  if (fwrite(tiff_header, sizeof(tiff_header), 1, fout) != 1) {
-    return 0;
-  }
-  // write pixel values
-  for (y = 0; y < height; ++y) {
-    if (fwrite(rgba, bytes_per_px, width, fout) != width) {
-      return 0;
-    }
-    rgba += stride;
-  }
-
-  return 1;
-}
-
-#undef TIFF_HEADER_SIZE
-#undef EXTRA_DATA_OFFSET
-#undef EXTRA_DATA_SIZE
-#undef NUM_IFD_ENTRIES
-
-//------------------------------------------------------------------------------
-// Raw Alpha
-
-int WebPWriteAlphaPlane(FILE* fout, const WebPDecBuffer* const buffer) {
-  if (fout == NULL || buffer == NULL) {
-    return 0;
-  } else {
-    const uint32_t width = buffer->width;
-    const uint32_t height = buffer->height;
-    const uint8_t* a = buffer->u.YUVA.a;
-    const int a_stride = buffer->u.YUVA.a_stride;
-    uint32_t y;
-
-    if (a == NULL) return 0;
-
-    fprintf(fout, "P5\n%u %u\n255\n", width, height);
-    for (y = 0; y < height; ++y) {
-      if (fwrite(a, width, 1, fout) != 1) return 0;
-      a += a_stride;
-    }
-    return 1;
-  }
-}
-
-//------------------------------------------------------------------------------
-// PGM with IMC4 layout
-
-int WebPWritePGM(FILE* fout, const WebPDecBuffer* const buffer) {
-  if (fout == NULL || buffer == NULL) {
-    return 0;
-  } else {
-    const int width = buffer->width;
-    const int height = buffer->height;
-    const WebPYUVABuffer* const yuv = &buffer->u.YUVA;
-    const uint8_t* src_y = yuv->y;
-    const uint8_t* src_u = yuv->u;
-    const uint8_t* src_v = yuv->v;
-    const uint8_t* src_a = yuv->a;
-    const int uv_width = (width + 1) / 2;
-    const int uv_height = (height + 1) / 2;
-    const int a_height = (src_a != NULL) ? height : 0;
-    int ok = 1;
-    int y;
-
-    if (src_y == NULL || src_u == NULL || src_v == NULL) return 0;
-
-    fprintf(fout, "P5\n%d %d\n255\n",
-            (width + 1) & ~1, height + uv_height + a_height);
-    for (y = 0; ok && y < height; ++y) {
-      ok &= (fwrite(src_y, width, 1, fout) == 1);
-      if (width & 1) fputc(0, fout);    // padding byte
-      src_y += yuv->y_stride;
-    }
-    for (y = 0; ok && y < uv_height; ++y) {
-      ok &= (fwrite(src_u, uv_width, 1, fout) == 1);
-      ok &= (fwrite(src_v, uv_width, 1, fout) == 1);
-      src_u += yuv->u_stride;
-      src_v += yuv->v_stride;
-    }
-    for (y = 0; ok && y < a_height; ++y) {
-      ok &= (fwrite(src_a, width, 1, fout) == 1);
-      if (width & 1) fputc(0, fout);    // padding byte
-      src_a += yuv->a_stride;
-    }
-    return ok;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Raw YUV(A) planes
-
-int WebPWriteYUV(FILE* fout, const WebPDecBuffer* const buffer) {
-  if (fout == NULL || buffer == NULL) {
-    return 0;
-  } else {
-    const int width = buffer->width;
-    const int height = buffer->height;
-    const WebPYUVABuffer* const yuv = &buffer->u.YUVA;
-    const uint8_t* src_y = yuv->y;
-    const uint8_t* src_u = yuv->u;
-    const uint8_t* src_v = yuv->v;
-    const uint8_t* src_a = yuv->a;
-    const int uv_width = (width + 1) / 2;
-    const int uv_height = (height + 1) / 2;
-    const int a_height = (src_a != NULL) ? height : 0;
-    int ok = 1;
-    int y;
-
-    if (src_y == NULL || src_u == NULL || src_v == NULL) return 0;
-
-    for (y = 0; ok && y < height; ++y) {
-      ok &= (fwrite(src_y, width, 1, fout) == 1);
-      src_y += yuv->y_stride;
-    }
-    for (y = 0; ok && y < uv_height; ++y) {
-      ok &= (fwrite(src_u, uv_width, 1, fout) == 1);
-      src_u += yuv->u_stride;
-    }
-    for (y = 0; ok && y < uv_height; ++y) {
-      ok &= (fwrite(src_v, uv_width, 1, fout) == 1);
-      src_v += yuv->v_stride;
-    }
-    for (y = 0; ok && y < a_height; ++y) {
-      ok &= (fwrite(src_a, width, 1, fout) == 1);
-      src_a += yuv->a_stride;
-    }
-    return ok;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Generic top-level call
-
-int WebPSaveImage(const WebPDecBuffer* const buffer,
-                  WebPOutputFileFormat format,
-                  const char* const out_file_name) {
-  FILE* fout = NULL;
-  int needs_open_file = 1;
-  const int use_stdout =
-      (out_file_name != NULL) && !WSTRCMP(out_file_name, "-");
-  int ok = 1;
-
-  if (buffer == NULL || out_file_name == NULL) return 0;
-
-#ifdef HAVE_WINCODEC_H
-  needs_open_file = (format != PNG);
-#endif
-
-  if (needs_open_file) {
-    fout = use_stdout ? ImgIoUtilSetBinaryMode(stdout)
-                      : WFOPEN(out_file_name, "wb");
-    if (fout == NULL) {
-      WFPRINTF(stderr, "Error opening output file %s\n",
-               (const W_CHAR*)out_file_name);
-      return 0;
-    }
-  }
-
-  if (format == PNG ||
-      format == RGBA || format == BGRA || format == ARGB ||
-      format == rgbA || format == bgrA || format == Argb) {
-#ifdef HAVE_WINCODEC_H
-    ok &= WebPWritePNG(out_file_name, use_stdout, buffer);
-#else
-    ok &= WebPWritePNG(fout, buffer);
-#endif
-  } else if (format == PAM) {
-    ok &= WebPWritePAM(fout, buffer);
-  } else if (format == PPM || format == RGB || format == BGR) {
-    ok &= WebPWritePPM(fout, buffer);
-  } else if (format == RGBA_4444 || format == RGB_565 || format == rgbA_4444) {
-    ok &= WebPWrite16bAsPGM(fout, buffer);
-  } else if (format == BMP) {
-    ok &= WebPWriteBMP(fout, buffer);
-  } else if (format == TIFF) {
-    ok &= WebPWriteTIFF(fout, buffer);
-  } else if (format == RAW_YUV) {
-    ok &= WebPWriteYUV(fout, buffer);
-  } else if (format == PGM || format == YUV || format == YUVA) {
-    ok &= WebPWritePGM(fout, buffer);
-  } else if (format == ALPHA_PLANE_ONLY) {
-    ok &= WebPWriteAlphaPlane(fout, buffer);
-  }
-  if (fout != NULL && fout != stdout) {
-    fclose(fout);
-  }
-  return ok;
-}

external/libwebp/libwebp/imageio/image_enc.h

@@ -1,96 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  All-in-one library to save PNG/JPEG/WebP/TIFF/WIC images.
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#ifndef WEBP_IMAGEIO_IMAGE_ENC_H_
-#define WEBP_IMAGEIO_IMAGE_ENC_H_
-
-#include <stdio.h>
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include "webp/types.h"
-#include "webp/decode.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Output types
-typedef enum {
-  PNG = 0,
-  PAM,
-  PPM,
-  PGM,
-  BMP,
-  TIFF,
-  RAW_YUV,
-  ALPHA_PLANE_ONLY,  // this is for experimenting only
-  // forced colorspace output (for testing, mostly)
-  RGB, RGBA, BGR, BGRA, ARGB,
-  RGBA_4444, RGB_565,
-  rgbA, bgrA, Argb, rgbA_4444,
-  YUV, YUVA
-} WebPOutputFileFormat;
-
-// General all-purpose call.
-// Most formats expect a 'buffer' containing RGBA-like samples, except
-// RAW_YUV, YUV and YUVA formats.
-// If 'out_file_name' is "-", data is saved to stdout.
-// Returns false if an error occurred, true otherwise.
-int WebPSaveImage(const WebPDecBuffer* const buffer,
-                  WebPOutputFileFormat format, const char* const out_file_name);
-
-// Save to PNG.
-#ifdef HAVE_WINCODEC_H
-int WebPWritePNG(const char* out_file_name, int use_stdout,
-                 const struct WebPDecBuffer* const buffer);
-#else
-int WebPWritePNG(FILE* out_file, const WebPDecBuffer* const buffer);
-#endif
-
-// Save to PPM format (RGB, no alpha)
-int WebPWritePPM(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save to PAM format (= PPM + alpha)
-int WebPWritePAM(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save 16b mode (RGBA4444, RGB565, ...) for debugging purposes.
-int WebPWrite16bAsPGM(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save as BMP
-int WebPWriteBMP(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save as TIFF
-int WebPWriteTIFF(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save the ALPHA plane (only) as a PGM
-int WebPWriteAlphaPlane(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save as YUV samples as PGM format (using IMC4 layout).
-// See: https://www.fourcc.org/yuv.php#IMC4.
-// (very convenient format for viewing the samples, esp. for odd dimensions).
-int WebPWritePGM(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save YUV(A) planes sequentially (raw dump)
-int WebPWriteYUV(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-// Save 16b mode (RGBA4444, RGB565, ...) as PGM format, for debugging purposes.
-int WebPWrite16bAsPGM(FILE* fout, const struct WebPDecBuffer* const buffer);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_IMAGE_ENC_H_

external/libwebp/libwebp/imageio/imageio_util.c

@@ -1,162 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Utility functions used by the image decoders.
-//
-
-#include "./imageio_util.h"
-
-#if defined(_WIN32)
-#include <fcntl.h>   // for _O_BINARY
-#include <io.h>      // for _setmode()
-#endif
-#include <stdlib.h>
-#include <string.h>
-#include "../examples/unicode.h"
-
-// -----------------------------------------------------------------------------
-// File I/O
-
-FILE* ImgIoUtilSetBinaryMode(FILE* file) {
-#if defined(_WIN32)
-  if (_setmode(_fileno(file), _O_BINARY) == -1) {
-    fprintf(stderr, "Failed to reopen file in O_BINARY mode.\n");
-    return NULL;
-  }
-#endif
-  return file;
-}
-
-int ImgIoUtilReadFromStdin(const uint8_t** data, size_t* data_size) {
-  static const size_t kBlockSize = 16384;  // default initial size
-  size_t max_size = 0;
-  size_t size = 0;
-  uint8_t* input = NULL;
-
-  if (data == NULL || data_size == NULL) return 0;
-  *data = NULL;
-  *data_size = 0;
-
-  if (!ImgIoUtilSetBinaryMode(stdin)) return 0;
-
-  while (!feof(stdin)) {
-    // We double the buffer size each time and read as much as possible.
-    const size_t extra_size = (max_size == 0) ? kBlockSize : max_size;
-    // we allocate one extra byte for the \0 terminator
-    void* const new_data = realloc(input, max_size + extra_size + 1);
-    if (new_data == NULL) goto Error;
-    input = (uint8_t*)new_data;
-    max_size += extra_size;
-    size += fread(input + size, 1, extra_size, stdin);
-    if (size < max_size) break;
-  }
-  if (ferror(stdin)) goto Error;
-  if (input != NULL) input[size] = '\0';  // convenient 0-terminator
-  *data = input;
-  *data_size = size;
-  return 1;
-
- Error:
-  free(input);
-  fprintf(stderr, "Could not read from stdin\n");
-  return 0;
-}
-
-int ImgIoUtilReadFile(const char* const file_name,
-                      const uint8_t** data, size_t* data_size) {
-  int ok;
-  uint8_t* file_data;
-  size_t file_size;
-  FILE* in;
-  const int from_stdin = (file_name == NULL) || !WSTRCMP(file_name, "-");
-
-  if (from_stdin) return ImgIoUtilReadFromStdin(data, data_size);
-
-  if (data == NULL || data_size == NULL) return 0;
-  *data = NULL;
-  *data_size = 0;
-
-  in = WFOPEN(file_name, "rb");
-  if (in == NULL) {
-    WFPRINTF(stderr, "cannot open input file '%s'\n", (const W_CHAR*)file_name);
-    return 0;
-  }
-  fseek(in, 0, SEEK_END);
-  file_size = ftell(in);
-  fseek(in, 0, SEEK_SET);
-  // we allocate one extra byte for the \0 terminator
-  file_data = (uint8_t*)WebPMalloc(file_size + 1);
-  if (file_data == NULL) {
-    fclose(in);
-    WFPRINTF(stderr, "memory allocation failure when reading file %s\n",
-             (const W_CHAR*)file_name);
-    return 0;
-  }
-  ok = (fread(file_data, file_size, 1, in) == 1);
-  fclose(in);
-
-  if (!ok) {
-    WFPRINTF(stderr, "Could not read %d bytes of data from file %s\n",
-             (int)file_size, (const W_CHAR*)file_name);
-    WebPFree(file_data);
-    return 0;
-  }
-  file_data[file_size] = '\0';  // convenient 0-terminator
-  *data = file_data;
-  *data_size = file_size;
-  return 1;
-}
-
-// -----------------------------------------------------------------------------
-
-int ImgIoUtilWriteFile(const char* const file_name,
-                       const uint8_t* data, size_t data_size) {
-  int ok;
-  FILE* out;
-  const int to_stdout = (file_name == NULL) || !WSTRCMP(file_name, "-");
-
-  if (data == NULL) {
-    return 0;
-  }
-  out = to_stdout ? ImgIoUtilSetBinaryMode(stdout) : WFOPEN(file_name, "wb");
-  if (out == NULL) {
-    WFPRINTF(stderr, "Error! Cannot open output file '%s'\n",
-             (const W_CHAR*)file_name);
-    return 0;
-  }
-  ok = (fwrite(data, data_size, 1, out) == 1);
-  if (out != stdout) fclose(out);
-  return ok;
-}
-
-// -----------------------------------------------------------------------------
-
-void ImgIoUtilCopyPlane(const uint8_t* src, int src_stride,
-                        uint8_t* dst, int dst_stride, int width, int height) {
-  while (height-- > 0) {
-    memcpy(dst, src, width * sizeof(*dst));
-    src += src_stride;
-    dst += dst_stride;
-  }
-}
-
-// -----------------------------------------------------------------------------
-
-int ImgIoUtilCheckSizeArgumentsOverflow(uint64_t stride, size_t height) {
-  const uint64_t total_size = stride * height;
-  int ok = (total_size == (size_t)total_size);
-  // check that 'stride' is representable as int:
-  ok = ok && ((uint64_t)(int)stride == stride);
-#if defined(WEBP_MAX_IMAGE_SIZE)
-  ok = ok && (total_size <= (uint64_t)WEBP_MAX_IMAGE_SIZE);
-#endif
-  return ok;
-}
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/imageio_util.h

@@ -1,64 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Utility functions used by the image decoders.
-//
-
-#ifndef WEBP_IMAGEIO_IMAGEIO_UTIL_H_
-#define WEBP_IMAGEIO_IMAGEIO_UTIL_H_
-
-#include <stdio.h>
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-//------------------------------------------------------------------------------
-// File I/O
-
-// Reopen file in binary (O_BINARY) mode.
-// Returns 'file' on success, NULL otherwise.
-FILE* ImgIoUtilSetBinaryMode(FILE* file);
-
-// Allocates storage for entire file 'file_name' and returns contents and size
-// in 'data' and 'data_size'. Returns 1 on success, 0 otherwise. '*data' should
-// be deleted using WebPFree().
-// Note: for convenience, the data will be null-terminated with an extra byte
-// (not accounted for in *data_size), in case the file is text and intended
-// to be used as a C-string.
-// If 'file_name' is NULL or equal to "-", input is read from stdin by calling
-// the function ImgIoUtilReadFromStdin().
-int ImgIoUtilReadFile(const char* const file_name,
-                      const uint8_t** data, size_t* data_size);
-
-// Same as ImgIoUtilReadFile(), but reads until EOF from stdin instead.
-int ImgIoUtilReadFromStdin(const uint8_t** data, size_t* data_size);
-
-// Write a data segment into a file named 'file_name'. Returns true if ok.
-// If 'file_name' is NULL or equal to "-", output is written to stdout.
-int ImgIoUtilWriteFile(const char* const file_name,
-                       const uint8_t* data, size_t data_size);
-
-//------------------------------------------------------------------------------
-
-// Copy width x height pixels from 'src' to 'dst' honoring the strides.
-void ImgIoUtilCopyPlane(const uint8_t* src, int src_stride,
-                        uint8_t* dst, int dst_stride, int width, int height);
-
-//------------------------------------------------------------------------------
-
-// Returns 0 in case of overflow, memory over-allocation or excessive dimension.
-int ImgIoUtilCheckSizeArgumentsOverflow(uint64_t stride, size_t height);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_IMAGEIO_UTIL_H_

external/libwebp/libwebp/imageio/jpegdec.c

@@ -1,364 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// JPEG decode.
-
-#include "./jpegdec.h"
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include <stdio.h>
-
-#ifdef WEBP_HAVE_JPEG
-#include <jpeglib.h>
-#include <jerror.h>
-#include <setjmp.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "webp/encode.h"
-#include "./imageio_util.h"
-#include "./metadata.h"
-
-// -----------------------------------------------------------------------------
-// Metadata processing
-
-#ifndef JPEG_APP1
-# define JPEG_APP1 (JPEG_APP0 + 1)
-#endif
-#ifndef JPEG_APP2
-# define JPEG_APP2 (JPEG_APP0 + 2)
-#endif
-
-typedef struct {
-  const uint8_t* data;
-  size_t data_length;
-  int seq;  // this segment's sequence number [1, 255] for use in reassembly.
-} ICCPSegment;
-
-static void SaveMetadataMarkers(j_decompress_ptr dinfo) {
-  const unsigned int max_marker_length = 0xffff;
-  jpeg_save_markers(dinfo, JPEG_APP1, max_marker_length);  // Exif/XMP
-  jpeg_save_markers(dinfo, JPEG_APP2, max_marker_length);  // ICC profile
-}
-
-static int CompareICCPSegments(const void* a, const void* b) {
-  const ICCPSegment* s1 = (const ICCPSegment*)a;
-  const ICCPSegment* s2 = (const ICCPSegment*)b;
-  return s1->seq - s2->seq;
-}
-
-// Extract ICC profile segments from the marker list in 'dinfo', reassembling
-// and storing them in 'iccp'.
-// Returns true on success and false for memory errors and corrupt profiles.
-static int StoreICCP(j_decompress_ptr dinfo, MetadataPayload* const iccp) {
-  // ICC.1:2010-12 (4.3.0.0) Annex B.4 Embedding ICC Profiles in JPEG files
-  static const char kICCPSignature[] = "ICC_PROFILE";
-  static const size_t kICCPSignatureLength = 12;  // signature includes '\0'
-  static const size_t kICCPSkipLength = 14;  // signature + seq & count
-  int expected_count = 0;
-  int actual_count = 0;
-  int seq_max = 0;
-  size_t total_size = 0;
-  ICCPSegment iccp_segments[255];
-  jpeg_saved_marker_ptr marker;
-
-  memset(iccp_segments, 0, sizeof(iccp_segments));
-  for (marker = dinfo->marker_list; marker != NULL; marker = marker->next) {
-    if (marker->marker == JPEG_APP2 &&
-        marker->data_length > kICCPSkipLength &&
-        !memcmp(marker->data, kICCPSignature, kICCPSignatureLength)) {
-      // ICC_PROFILE\0<seq><count>; 'seq' starts at 1.
-      const int seq = marker->data[kICCPSignatureLength];
-      const int count = marker->data[kICCPSignatureLength + 1];
-      const size_t segment_size = marker->data_length - kICCPSkipLength;
-      ICCPSegment* segment;
-
-      if (segment_size == 0 || count == 0 || seq == 0) {
-        fprintf(stderr, "[ICCP] size (%d) / count (%d) / sequence number (%d)"
-                        " cannot be 0!\n",
-                (int)segment_size, seq, count);
-        return 0;
-      }
-
-      if (expected_count == 0) {
-        expected_count = count;
-      } else if (expected_count != count) {
-        fprintf(stderr, "[ICCP] Inconsistent segment count (%d / %d)!\n",
-                expected_count, count);
-        return 0;
-      }
-
-      segment = iccp_segments + seq - 1;
-      if (segment->data_length != 0) {
-        fprintf(stderr, "[ICCP] Duplicate segment number (%d)!\n" , seq);
-        return 0;
-      }
-
-      segment->data = marker->data + kICCPSkipLength;
-      segment->data_length = segment_size;
-      segment->seq = seq;
-      total_size += segment_size;
-      if (seq > seq_max) seq_max = seq;
-      ++actual_count;
-    }
-  }
-
-  if (actual_count == 0) return 1;
-  if (seq_max != actual_count) {
-    fprintf(stderr, "[ICCP] Discontinuous segments, expected: %d actual: %d!\n",
-            actual_count, seq_max);
-    return 0;
-  }
-  if (expected_count != actual_count) {
-    fprintf(stderr, "[ICCP] Segment count: %d does not match expected: %d!\n",
-            actual_count, expected_count);
-    return 0;
-  }
-
-  // The segments may appear out of order in the file, sort them based on
-  // sequence number before assembling the payload.
-  qsort(iccp_segments, actual_count, sizeof(*iccp_segments),
-        CompareICCPSegments);
-
-  iccp->bytes = (uint8_t*)malloc(total_size);
-  if (iccp->bytes == NULL) return 0;
-  iccp->size = total_size;
-
-  {
-    int i;
-    size_t offset = 0;
-    for (i = 0; i < seq_max; ++i) {
-      memcpy(iccp->bytes + offset,
-             iccp_segments[i].data, iccp_segments[i].data_length);
-      offset += iccp_segments[i].data_length;
-    }
-  }
-  return 1;
-}
-
-// Returns true on success and false for memory errors and corrupt profiles.
-// The caller must use MetadataFree() on 'metadata' in all cases.
-static int ExtractMetadataFromJPEG(j_decompress_ptr dinfo,
-                                   Metadata* const metadata) {
-  static const struct {
-    int marker;
-    const char* signature;
-    size_t signature_length;
-    size_t storage_offset;
-  } kJPEGMetadataMap[] = {
-    // Exif 2.2 Section 4.7.2 Interoperability Structure of APP1 ...
-    { JPEG_APP1, "Exif\0",                        6, METADATA_OFFSET(exif) },
-    // XMP Specification Part 3 Section 3 Embedding XMP Metadata ... #JPEG
-    // TODO(jzern) Add support for 'ExtendedXMP'
-    { JPEG_APP1, "http://ns.adobe.com/xap/1.0/", 29, METADATA_OFFSET(xmp) },
-    { 0, NULL, 0, 0 },
-  };
-  jpeg_saved_marker_ptr marker;
-  // Treat ICC profiles separately as they may be segmented and out of order.
-  if (!StoreICCP(dinfo, &metadata->iccp)) return 0;
-
-  for (marker = dinfo->marker_list; marker != NULL; marker = marker->next) {
-    int i;
-    for (i = 0; kJPEGMetadataMap[i].marker != 0; ++i) {
-      if (marker->marker == kJPEGMetadataMap[i].marker &&
-          marker->data_length > kJPEGMetadataMap[i].signature_length &&
-          !memcmp(marker->data, kJPEGMetadataMap[i].signature,
-                  kJPEGMetadataMap[i].signature_length)) {
-        MetadataPayload* const payload =
-            (MetadataPayload*)((uint8_t*)metadata +
-                               kJPEGMetadataMap[i].storage_offset);
-
-        if (payload->bytes == NULL) {
-          const char* marker_data = (const char*)marker->data +
-                                    kJPEGMetadataMap[i].signature_length;
-          const size_t marker_data_length =
-              marker->data_length - kJPEGMetadataMap[i].signature_length;
-          if (!MetadataCopy(marker_data, marker_data_length, payload)) return 0;
-        } else {
-          fprintf(stderr, "Ignoring additional '%s' marker\n",
-                  kJPEGMetadataMap[i].signature);
-        }
-      }
-    }
-  }
-  return 1;
-}
-
-#undef JPEG_APP1
-#undef JPEG_APP2
-
-// -----------------------------------------------------------------------------
-// JPEG decoding
-
-struct my_error_mgr {
-  struct jpeg_error_mgr pub;
-  jmp_buf setjmp_buffer;
-};
-
-static void my_error_exit(j_common_ptr dinfo) {
-  struct my_error_mgr* myerr = (struct my_error_mgr*)dinfo->err;
-  fprintf(stderr, "libjpeg error: ");
-  dinfo->err->output_message(dinfo);
-  longjmp(myerr->setjmp_buffer, 1);
-}
-
-typedef struct {
-  struct jpeg_source_mgr pub;
-  const uint8_t* data;
-  size_t data_size;
-} JPEGReadContext;
-
-static void ContextInit(j_decompress_ptr cinfo) {
-  JPEGReadContext* const ctx = (JPEGReadContext*)cinfo->src;
-  ctx->pub.next_input_byte = ctx->data;
-  ctx->pub.bytes_in_buffer = ctx->data_size;
-}
-
-static boolean ContextFill(j_decompress_ptr cinfo) {
-  // we shouldn't get here.
-  ERREXIT(cinfo, JERR_FILE_READ);
-  return FALSE;
-}
-
-static void ContextSkip(j_decompress_ptr cinfo, long jump_size) {
-  JPEGReadContext* const ctx = (JPEGReadContext*)cinfo->src;
-  size_t jump = (size_t)jump_size;
-  if (jump > ctx->pub.bytes_in_buffer) {  // Don't overflow the buffer.
-    jump = ctx->pub.bytes_in_buffer;
-  }
-  ctx->pub.bytes_in_buffer -= jump;
-  ctx->pub.next_input_byte += jump;
-}
-
-static void ContextTerm(j_decompress_ptr cinfo) {
-  (void)cinfo;
-}
-
-static void ContextSetup(volatile struct jpeg_decompress_struct* const cinfo,
-                         JPEGReadContext* const ctx) {
-  cinfo->src = (struct jpeg_source_mgr*)ctx;
-  ctx->pub.init_source = ContextInit;
-  ctx->pub.fill_input_buffer = ContextFill;
-  ctx->pub.skip_input_data = ContextSkip;
-  ctx->pub.resync_to_restart = jpeg_resync_to_restart;
-  ctx->pub.term_source = ContextTerm;
-  ctx->pub.bytes_in_buffer = 0;
-  ctx->pub.next_input_byte = NULL;
-}
-
-int ReadJPEG(const uint8_t* const data, size_t data_size,
-             WebPPicture* const pic, int keep_alpha,
-             Metadata* const metadata) {
-  volatile int ok = 0;
-  int width, height;
-  int64_t stride;
-  volatile struct jpeg_decompress_struct dinfo;
-  struct my_error_mgr jerr;
-  uint8_t* volatile rgb = NULL;
-  JSAMPROW buffer[1];
-  JPEGReadContext ctx;
-
-  if (data == NULL || data_size == 0 || pic == NULL) return 0;
-
-  (void)keep_alpha;
-  memset(&ctx, 0, sizeof(ctx));
-  ctx.data = data;
-  ctx.data_size = data_size;
-
-  memset((j_decompress_ptr)&dinfo, 0, sizeof(dinfo));   // for setjmp safety
-  dinfo.err = jpeg_std_error(&jerr.pub);
-  jerr.pub.error_exit = my_error_exit;
-
-  if (setjmp(jerr.setjmp_buffer)) {
- Error:
-    MetadataFree(metadata);
-    jpeg_destroy_decompress((j_decompress_ptr)&dinfo);
-    goto End;
-  }
-
-  jpeg_create_decompress((j_decompress_ptr)&dinfo);
-  ContextSetup(&dinfo, &ctx);
-  if (metadata != NULL) SaveMetadataMarkers((j_decompress_ptr)&dinfo);
-  jpeg_read_header((j_decompress_ptr)&dinfo, TRUE);
-
-  dinfo.out_color_space = JCS_RGB;
-  dinfo.do_fancy_upsampling = TRUE;
-
-  jpeg_start_decompress((j_decompress_ptr)&dinfo);
-
-  if (dinfo.output_components != 3) {
-    goto Error;
-  }
-
-  width = dinfo.output_width;
-  height = dinfo.output_height;
-  stride = (int64_t)dinfo.output_width * dinfo.output_components * sizeof(*rgb);
-
-  if (stride != (int)stride ||
-      !ImgIoUtilCheckSizeArgumentsOverflow(stride, height)) {
-    goto Error;
-  }
-
-  rgb = (uint8_t*)malloc((size_t)stride * height);
-  if (rgb == NULL) {
-    goto Error;
-  }
-  buffer[0] = (JSAMPLE*)rgb;
-
-  while (dinfo.output_scanline < dinfo.output_height) {
-    if (jpeg_read_scanlines((j_decompress_ptr)&dinfo, buffer, 1) != 1) {
-      goto Error;
-    }
-    buffer[0] += stride;
-  }
-
-  if (metadata != NULL) {
-    ok = ExtractMetadataFromJPEG((j_decompress_ptr)&dinfo, metadata);
-    if (!ok) {
-      fprintf(stderr, "Error extracting JPEG metadata!\n");
-      goto Error;
-    }
-  }
-
-  jpeg_finish_decompress((j_decompress_ptr)&dinfo);
-  jpeg_destroy_decompress((j_decompress_ptr)&dinfo);
-
-  // WebP conversion.
-  pic->width = width;
-  pic->height = height;
-  ok = WebPPictureImportRGB(pic, rgb, (int)stride);
-  if (!ok) {
-    pic->width = 0;   // WebPPictureImportRGB() barely touches 'pic' on failure.
-    pic->height = 0;  // Just reset dimensions but keep any 'custom_ptr' etc.
-    MetadataFree(metadata);  // In case the caller forgets to free it on error.
-  }
-
- End:
-  free(rgb);
-  return ok;
-}
-#else  // !WEBP_HAVE_JPEG
-int ReadJPEG(const uint8_t* const data, size_t data_size,
-             struct WebPPicture* const pic, int keep_alpha,
-             struct Metadata* const metadata) {
-  (void)data;
-  (void)data_size;
-  (void)pic;
-  (void)keep_alpha;
-  (void)metadata;
-  fprintf(stderr, "JPEG support not compiled. Please install the libjpeg "
-          "development package before building.\n");
-  return 0;
-}
-#endif  // WEBP_HAVE_JPEG
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/jpegdec.h

@@ -1,37 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// JPEG decode.
-
-#ifndef WEBP_IMAGEIO_JPEGDEC_H_
-#define WEBP_IMAGEIO_JPEGDEC_H_
-
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct Metadata;
-struct WebPPicture;
-
-// Reads a JPEG from 'data', returning the decoded output in 'pic'.
-// The output is RGB or YUV depending on pic->use_argb value.
-// Returns true on success.
-// 'keep_alpha' has no effect, but is kept for coherence with other signatures
-// for image readers.
-int ReadJPEG(const uint8_t* const data, size_t data_size,
-             struct WebPPicture* const pic, int keep_alpha,
-             struct Metadata* const metadata);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_JPEGDEC_H_

external/libwebp/libwebp/imageio/metadata.c

@@ -1,49 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Metadata types and functions.
-//
-
-#include "./metadata.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "webp/types.h"
-
-void MetadataInit(Metadata* const metadata) {
-  if (metadata == NULL) return;
-  memset(metadata, 0, sizeof(*metadata));
-}
-
-void MetadataPayloadDelete(MetadataPayload* const payload) {
-  if (payload == NULL) return;
-  free(payload->bytes);
-  payload->bytes = NULL;
-  payload->size = 0;
-}
-
-void MetadataFree(Metadata* const metadata) {
-  if (metadata == NULL) return;
-  MetadataPayloadDelete(&metadata->exif);
-  MetadataPayloadDelete(&metadata->iccp);
-  MetadataPayloadDelete(&metadata->xmp);
-}
-
-int MetadataCopy(const char* metadata, size_t metadata_len,
-                 MetadataPayload* const payload) {
-  if (metadata == NULL || metadata_len == 0 || payload == NULL) return 0;
-  payload->bytes = (uint8_t*)malloc(metadata_len);
-  if (payload->bytes == NULL) return 0;
-  payload->size = metadata_len;
-  memcpy(payload->bytes, metadata, metadata_len);
-  return 1;
-}
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/metadata.h

@@ -1,47 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-//  Metadata types and functions.
-//
-
-#ifndef WEBP_IMAGEIO_METADATA_H_
-#define WEBP_IMAGEIO_METADATA_H_
-
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct MetadataPayload {
-  uint8_t* bytes;
-  size_t size;
-} MetadataPayload;
-
-typedef struct Metadata {
-  MetadataPayload exif;
-  MetadataPayload iccp;
-  MetadataPayload xmp;
-} Metadata;
-
-#define METADATA_OFFSET(x) offsetof(Metadata, x)
-
-void MetadataInit(Metadata* const metadata);
-void MetadataPayloadDelete(MetadataPayload* const payload);
-void MetadataFree(Metadata* const metadata);
-
-// Stores 'metadata' to 'payload->bytes', returns false on allocation error.
-int MetadataCopy(const char* metadata, size_t metadata_len,
-                 MetadataPayload* const payload);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_METADATA_H_

external/libwebp/libwebp/imageio/pngdec.c

@@ -1,374 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// PNG decode.
-
-#include "./pngdec.h"
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include <stdio.h>
-
-#ifdef WEBP_HAVE_PNG
-#ifndef PNG_USER_MEM_SUPPORTED
-#define PNG_USER_MEM_SUPPORTED  // for png_create_read_struct_2
-#endif
-#include <png.h>
-#include <setjmp.h>   // note: this must be included *after* png.h
-#include <stdlib.h>
-#include <string.h>
-
-#include "webp/encode.h"
-#include "./imageio_util.h"
-#include "./metadata.h"
-
-#define LOCAL_PNG_VERSION ((PNG_LIBPNG_VER_MAJOR << 8) | PNG_LIBPNG_VER_MINOR)
-#define LOCAL_PNG_PREREQ(maj, min) \
-   (LOCAL_PNG_VERSION >= (((maj) << 8) | (min)))
-
-static void PNGAPI error_function(png_structp png, png_const_charp error) {
-  if (error != NULL) fprintf(stderr, "libpng error: %s\n", error);
-  longjmp(png_jmpbuf(png), 1);
-}
-
-#if LOCAL_PNG_PREREQ(1,4)
-typedef png_alloc_size_t LocalPngAllocSize;
-#else
-typedef png_size_t LocalPngAllocSize;
-#endif
-
-static png_voidp MallocFunc(png_structp png_ptr, LocalPngAllocSize size) {
-  (void)png_ptr;
-  if (size != (size_t)size) return NULL;
-  if (!ImgIoUtilCheckSizeArgumentsOverflow(size, 1)) return NULL;
-  return (png_voidp)malloc((size_t)size);
-}
-
-static void FreeFunc(png_structp png_ptr, png_voidp ptr) {
-  (void)png_ptr;
-  free(ptr);
-}
-
-// Converts the NULL terminated 'hexstring' which contains 2-byte character
-// representations of hex values to raw data.
-// 'hexstring' may contain values consisting of [A-F][a-f][0-9] in pairs,
-// e.g., 7af2..., separated by any number of newlines.
-// 'expected_length' is the anticipated processed size.
-// On success the raw buffer is returned with its length equivalent to
-// 'expected_length'. NULL is returned if the processed length is less than
-// 'expected_length' or any character aside from those above is encountered.
-// The returned buffer must be freed by the caller.
-static uint8_t* HexStringToBytes(const char* hexstring,
-                                 size_t expected_length) {
-  const char* src = hexstring;
-  size_t actual_length = 0;
-  uint8_t* const raw_data = (uint8_t*)malloc(expected_length);
-  uint8_t* dst;
-
-  if (raw_data == NULL) return NULL;
-
-  for (dst = raw_data; actual_length < expected_length && *src != '\0'; ++src) {
-    char* end;
-    char val[3];
-    if (*src == '\n') continue;
-    val[0] = *src++;
-    val[1] = *src;
-    val[2] = '\0';
-    *dst++ = (uint8_t)strtol(val, &end, 16);
-    if (end != val + 2) break;
-    ++actual_length;
-  }
-
-  if (actual_length != expected_length) {
-    free(raw_data);
-    return NULL;
-  }
-  return raw_data;
-}
-
-static int ProcessRawProfile(const char* profile, size_t profile_len,
-                             MetadataPayload* const payload) {
-  const char* src = profile;
-  char* end;
-  int expected_length;
-
-  if (profile == NULL || profile_len == 0) return 0;
-
-  // ImageMagick formats 'raw profiles' as
-  // '\n<name>\n<length>(%8lu)\n<hex payload>\n'.
-  if (*src != '\n') {
-    fprintf(stderr, "Malformed raw profile, expected '\\n' got '\\x%.2X'\n",
-            *src);
-    return 0;
-  }
-  ++src;
-  // skip the profile name and extract the length.
-  while (*src != '\0' && *src++ != '\n') {}
-  expected_length = (int)strtol(src, &end, 10);
-  if (*end != '\n') {
-    fprintf(stderr, "Malformed raw profile, expected '\\n' got '\\x%.2X'\n",
-            *end);
-    return 0;
-  }
-  ++end;
-
-  // 'end' now points to the profile payload.
-  payload->bytes = HexStringToBytes(end, expected_length);
-  if (payload->bytes == NULL) return 0;
-  payload->size = expected_length;
-  return 1;
-}
-
-static const struct {
-  const char* name;
-  int (*process)(const char* profile, size_t profile_len,
-                 MetadataPayload* const payload);
-  size_t storage_offset;
-} kPNGMetadataMap[] = {
-  // https://exiftool.org/TagNames/PNG.html#TextualData
-  // See also: ExifTool on CPAN.
-  { "Raw profile type exif", ProcessRawProfile, METADATA_OFFSET(exif) },
-  { "Raw profile type xmp",  ProcessRawProfile, METADATA_OFFSET(xmp) },
-  // Exiftool puts exif data in APP1 chunk, too.
-  { "Raw profile type APP1", ProcessRawProfile, METADATA_OFFSET(exif) },
-  // XMP Specification Part 3, Section 3 #PNG
-  { "XML:com.adobe.xmp",     MetadataCopy,      METADATA_OFFSET(xmp) },
-  { NULL, NULL, 0 },
-};
-
-// Looks for metadata at both the beginning and end of the PNG file, giving
-// preference to the head.
-// Returns true on success. The caller must use MetadataFree() on 'metadata' in
-// all cases.
-static int ExtractMetadataFromPNG(png_structp png,
-                                  png_infop const head_info,
-                                  png_infop const end_info,
-                                  Metadata* const metadata) {
-  int p;
-
-  for (p = 0; p < 2; ++p)  {
-    png_infop const info = (p == 0) ? head_info : end_info;
-    png_textp text = NULL;
-    const png_uint_32 num = png_get_text(png, info, &text, NULL);
-    png_uint_32 i;
-    // Look for EXIF / XMP metadata.
-    for (i = 0; i < num; ++i, ++text) {
-      int j;
-      for (j = 0; kPNGMetadataMap[j].name != NULL; ++j) {
-        if (!strcmp(text->key, kPNGMetadataMap[j].name)) {
-          MetadataPayload* const payload =
-              (MetadataPayload*)((uint8_t*)metadata +
-                                 kPNGMetadataMap[j].storage_offset);
-          png_size_t text_length;
-          switch (text->compression) {
-#ifdef PNG_iTXt_SUPPORTED
-            case PNG_ITXT_COMPRESSION_NONE:
-            case PNG_ITXT_COMPRESSION_zTXt:
-              text_length = text->itxt_length;
-              break;
-#endif
-            case PNG_TEXT_COMPRESSION_NONE:
-            case PNG_TEXT_COMPRESSION_zTXt:
-            default:
-              text_length = text->text_length;
-              break;
-          }
-          if (payload->bytes != NULL) {
-            fprintf(stderr, "Ignoring additional '%s'\n", text->key);
-          } else if (!kPNGMetadataMap[j].process(text->text, text_length,
-                                                 payload)) {
-            fprintf(stderr, "Failed to process: '%s'\n", text->key);
-            return 0;
-          }
-          break;
-        }
-      }
-    }
-    // Look for an ICC profile.
-    {
-      png_charp name;
-      int comp_type;
-#if LOCAL_PNG_PREREQ(1,5)
-      png_bytep profile;
-#else
-      png_charp profile;
-#endif
-      png_uint_32 len;
-
-      if (png_get_iCCP(png, info,
-                       &name, &comp_type, &profile, &len) == PNG_INFO_iCCP) {
-        if (!MetadataCopy((const char*)profile, len, &metadata->iccp)) return 0;
-      }
-    }
-  }
-  return 1;
-}
-
-typedef struct {
-  const uint8_t* data;
-  size_t data_size;
-  png_size_t offset;
-} PNGReadContext;
-
-static void ReadFunc(png_structp png_ptr, png_bytep data, png_size_t length) {
-  PNGReadContext* const ctx = (PNGReadContext*)png_get_io_ptr(png_ptr);
-  if (ctx->data_size - ctx->offset < length) {
-    png_error(png_ptr, "ReadFunc: invalid read length (overflow)!");
-  }
-  memcpy(data, ctx->data + ctx->offset, length);
-  ctx->offset += length;
-}
-
-int ReadPNG(const uint8_t* const data, size_t data_size,
-            struct WebPPicture* const pic,
-            int keep_alpha, struct Metadata* const metadata) {
-  volatile png_structp png = NULL;
-  volatile png_infop info = NULL;
-  volatile png_infop end_info = NULL;
-  PNGReadContext context = { NULL, 0, 0 };
-  int color_type, bit_depth, interlaced;
-  int num_channels;
-  int num_passes;
-  int p;
-  volatile int ok = 0;
-  png_uint_32 width, height, y;
-  int64_t stride;
-  uint8_t* volatile rgb = NULL;
-
-  if (data == NULL || data_size == 0 || pic == NULL) return 0;
-
-  context.data = data;
-  context.data_size = data_size;
-
-  png = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL,
-                                 NULL, MallocFunc, FreeFunc);
-  if (png == NULL) goto End;
-
-  png_set_error_fn(png, 0, error_function, NULL);
-  if (setjmp(png_jmpbuf(png))) {
- Error:
-    MetadataFree(metadata);
-    goto End;
-  }
-
-#if LOCAL_PNG_PREREQ(1,5) || \
-    (LOCAL_PNG_PREREQ(1,4) && PNG_LIBPNG_VER_RELEASE >= 1)
-  // If it looks like the bitstream is going to need more memory than libpng's
-  // internal limit (default: 8M), try to (reasonably) raise it.
-  if (data_size > png_get_chunk_malloc_max(png) && data_size < (1u << 24)) {
-    png_set_chunk_malloc_max(png, data_size);
-  }
-#endif
-
-  info = png_create_info_struct(png);
-  if (info == NULL) goto Error;
-  end_info = png_create_info_struct(png);
-  if (end_info == NULL) goto Error;
-
-  png_set_read_fn(png, &context, ReadFunc);
-  png_read_info(png, info);
-  if (!png_get_IHDR(png, info,
-                    &width, &height, &bit_depth, &color_type, &interlaced,
-                    NULL, NULL)) goto Error;
-
-  png_set_strip_16(png);
-  png_set_packing(png);
-  if (color_type == PNG_COLOR_TYPE_PALETTE) {
-    png_set_palette_to_rgb(png);
-  }
-  if (color_type == PNG_COLOR_TYPE_GRAY ||
-      color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
-    if (bit_depth < 8) {
-      png_set_expand_gray_1_2_4_to_8(png);
-    }
-    png_set_gray_to_rgb(png);
-  }
-  if (png_get_valid(png, info, PNG_INFO_tRNS)) {
-    png_set_tRNS_to_alpha(png);
-  }
-
-  // Apply gamma correction if needed.
-  {
-    double image_gamma = 1 / 2.2, screen_gamma = 2.2;
-    int srgb_intent;
-    if (png_get_sRGB(png, info, &srgb_intent) ||
-        png_get_gAMA(png, info, &image_gamma)) {
-      png_set_gamma(png, screen_gamma, image_gamma);
-    }
-  }
-
-  if (!keep_alpha) {
-    png_set_strip_alpha(png);
-  }
-
-  num_passes = png_set_interlace_handling(png);
-  png_read_update_info(png, info);
-
-  num_channels = png_get_channels(png, info);
-  if (num_channels != 3 && num_channels != 4) {
-    goto Error;
-  }
-  stride = (int64_t)num_channels * width * sizeof(*rgb);
-  if (stride != (int)stride ||
-      !ImgIoUtilCheckSizeArgumentsOverflow(stride, height)) {
-    goto Error;
-  }
-
-  rgb = (uint8_t*)malloc((size_t)stride * height);
-  if (rgb == NULL) goto Error;
-  for (p = 0; p < num_passes; ++p) {
-    png_bytep row = rgb;
-    for (y = 0; y < height; ++y) {
-      png_read_rows(png, &row, NULL, 1);
-      row += stride;
-    }
-  }
-  png_read_end(png, end_info);
-
-  if (metadata != NULL &&
-      !ExtractMetadataFromPNG(png, info, end_info, metadata)) {
-    fprintf(stderr, "Error extracting PNG metadata!\n");
-    goto Error;
-  }
-
-  pic->width = (int)width;
-  pic->height = (int)height;
-  ok = (num_channels == 4) ? WebPPictureImportRGBA(pic, rgb, (int)stride)
-                           : WebPPictureImportRGB(pic, rgb, (int)stride);
-
-  if (!ok) {
-    goto Error;
-  }
-
- End:
-  if (png != NULL) {
-    png_destroy_read_struct((png_structpp)&png,
-                            (png_infopp)&info, (png_infopp)&end_info);
-  }
-  free(rgb);
-  return ok;
-}
-#else  // !WEBP_HAVE_PNG
-int ReadPNG(const uint8_t* const data, size_t data_size,
-            struct WebPPicture* const pic,
-            int keep_alpha, struct Metadata* const metadata) {
-  (void)data;
-  (void)data_size;
-  (void)pic;
-  (void)keep_alpha;
-  (void)metadata;
-  fprintf(stderr, "PNG support not compiled. Please install the libpng "
-          "development package before building.\n");
-  return 0;
-}
-#endif  // WEBP_HAVE_PNG
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/pngdec.h

@@ -1,37 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// PNG decode.
-
-#ifndef WEBP_IMAGEIO_PNGDEC_H_
-#define WEBP_IMAGEIO_PNGDEC_H_
-
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct Metadata;
-struct WebPPicture;
-
-// Reads a PNG from 'data', returning the decoded output in 'pic'.
-// Output is RGBA or YUVA, depending on pic->use_argb value.
-// If 'keep_alpha' is true and the PNG has an alpha channel, the output is RGBA
-// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.
-// Returns true on success.
-int ReadPNG(const uint8_t* const data, size_t data_size,
-            struct WebPPicture* const pic,
-            int keep_alpha, struct Metadata* const metadata);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_PNGDEC_H_

external/libwebp/libwebp/imageio/pnmdec.c

@@ -1,301 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// (limited) PNM decoder
-
-#include "./pnmdec.h"
-
-#include <assert.h>
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "webp/encode.h"
-#include "./imageio_util.h"
-
-#if defined(_MSC_VER) && _MSC_VER < 1900
-#define snprintf _snprintf
-#endif
-
-typedef enum {
-  WIDTH_FLAG      = 1 << 0,
-  HEIGHT_FLAG     = 1 << 1,
-  DEPTH_FLAG      = 1 << 2,
-  MAXVAL_FLAG     = 1 << 3,
-  TUPLE_FLAG      = 1 << 4,
-  ALL_NEEDED_FLAGS = WIDTH_FLAG | HEIGHT_FLAG | DEPTH_FLAG | MAXVAL_FLAG
-} PNMFlags;
-
-typedef struct {
-  const uint8_t* data;
-  size_t data_size;
-  int width, height;
-  int bytes_per_px;
-  int depth;          // 1 (grayscale), 2 (grayscale + alpha), 3 (rgb), 4 (rgba)
-  int max_value;
-  int type;           // 5, 6 or 7
-  int seen_flags;
-} PNMInfo;
-
-// -----------------------------------------------------------------------------
-// PNM decoding
-
-#define MAX_LINE_SIZE 1024
-static const size_t kMinPNMHeaderSize = 3;
-
-static size_t ReadLine(const uint8_t* const data, size_t off, size_t data_size,
-                       char out[MAX_LINE_SIZE + 1], size_t* const out_size) {
-  size_t i = 0;
-  *out_size = 0;
- redo:
-  for (i = 0; i < MAX_LINE_SIZE && off < data_size; ++i) {
-    out[i] = data[off++];
-    if (out[i] == '\n') break;
-  }
-  if (off < data_size) {
-    if (i == 0) goto redo;         // empty line
-    if (out[0] == '#') goto redo;  // skip comment
-  }
-  out[i] = 0;   // safety sentinel
-  *out_size = i;
-  return off;
-}
-
-static size_t FlagError(const char flag[]) {
-  fprintf(stderr, "PAM header error: flags '%s' already seen.\n", flag);
-  return 0;
-}
-
-// inspired from http://netpbm.sourceforge.net/doc/pam.html
-static size_t ReadPAMFields(PNMInfo* const info, size_t off) {
-  char out[MAX_LINE_SIZE + 1];
-  size_t out_size;
-  int tmp;
-  int expected_depth = -1;
-  assert(info != NULL);
-  while (1) {
-    off = ReadLine(info->data, off, info->data_size, out, &out_size);
-    if (off == 0) return 0;
-    if (sscanf(out, "WIDTH %d", &tmp) == 1) {
-      if (info->seen_flags & WIDTH_FLAG) return FlagError("WIDTH");
-      info->seen_flags |= WIDTH_FLAG;
-      info->width = tmp;
-    } else if (sscanf(out, "HEIGHT %d", &tmp) == 1) {
-      if (info->seen_flags & HEIGHT_FLAG) return FlagError("HEIGHT");
-      info->seen_flags |= HEIGHT_FLAG;
-      info->height = tmp;
-    } else if (sscanf(out, "DEPTH %d", &tmp) == 1) {
-      if (info->seen_flags & DEPTH_FLAG) return FlagError("DEPTH");
-      info->seen_flags |= DEPTH_FLAG;
-      info->depth = tmp;
-    } else if (sscanf(out, "MAXVAL %d", &tmp) == 1) {
-      if (info->seen_flags & MAXVAL_FLAG) return FlagError("MAXVAL");
-      info->seen_flags |= MAXVAL_FLAG;
-      info->max_value = tmp;
-    } else if (!strcmp(out, "TUPLTYPE RGB_ALPHA")) {
-      expected_depth = 4;
-      info->seen_flags |= TUPLE_FLAG;
-    } else if (!strcmp(out, "TUPLTYPE RGB")) {
-      expected_depth = 3;
-      info->seen_flags |= TUPLE_FLAG;
-    } else if (!strcmp(out, "TUPLTYPE GRAYSCALE_ALPHA")) {
-      expected_depth = 2;
-      info->seen_flags |= TUPLE_FLAG;
-    } else if (!strcmp(out, "TUPLTYPE GRAYSCALE")) {
-      expected_depth = 1;
-      info->seen_flags |= TUPLE_FLAG;
-    } else if (!strcmp(out, "ENDHDR")) {
-      break;
-    } else {
-      static const char kEllipsis[] = " ...";
-      const size_t kLen = strlen(kEllipsis) + 1;  // +1 = trailing \0
-      int i;
-      if (out_size > 20) snprintf(out + 20 - kLen, kLen, kEllipsis);
-      for (i = 0; i < (int)strlen(out); ++i) {
-        // isprint() might trigger a "char-subscripts" warning if given a char.
-        if (!isprint((int)out[i])) out[i] = ' ';
-      }
-      fprintf(stderr, "PAM header error: unrecognized entry [%s]\n", out);
-      return 0;
-    }
-  }
-  if (!(info->seen_flags & ALL_NEEDED_FLAGS)) {
-    fprintf(stderr, "PAM header error: missing tags%s%s%s%s\n",
-            (info->seen_flags & WIDTH_FLAG) ? "" : " WIDTH",
-            (info->seen_flags & HEIGHT_FLAG) ? "" : " HEIGHT",
-            (info->seen_flags & DEPTH_FLAG) ? "" : " DEPTH",
-            (info->seen_flags & MAXVAL_FLAG) ? "" : " MAXVAL");
-    return 0;
-  }
-  if (expected_depth != -1 && info->depth != expected_depth) {
-    fprintf(stderr, "PAM header error: expected DEPTH %d but got DEPTH %d\n",
-            expected_depth, info->depth);
-    return 0;
-  }
-  return off;
-}
-
-static size_t ReadHeader(PNMInfo* const info) {
-  size_t off = 0;
-  char out[MAX_LINE_SIZE + 1];
-  size_t out_size;
-  if (info == NULL) return 0;
-  if (info->data == NULL || info->data_size < kMinPNMHeaderSize) return 0;
-
-  info->width = info->height = 0;
-  info->type = -1;
-  info->seen_flags = 0;
-  info->bytes_per_px = 0;
-  info->depth = 0;
-  info->max_value = 0;
-
-  off = ReadLine(info->data, off, info->data_size, out, &out_size);
-  if (off == 0 || sscanf(out, "P%d", &info->type) != 1) return 0;
-  if (info->type == 7) {
-    off = ReadPAMFields(info, off);
-  } else {
-    off = ReadLine(info->data, off, info->data_size, out, &out_size);
-    if (off == 0 || sscanf(out, "%d %d", &info->width, &info->height) != 2) {
-      return 0;
-    }
-    off = ReadLine(info->data, off, info->data_size, out, &out_size);
-    if (off == 0 || sscanf(out, "%d", &info->max_value) != 1) return 0;
-
-    // finish initializing missing fields
-    info->depth = (info->type == 5) ? 1 : 3;
-  }
-  // perform some basic numerical validation
-  if (info->width <= 0 || info->height <= 0 ||
-      info->type <= 0 || info->type >= 9 ||
-      info->depth <= 0 || info->depth > 4 ||
-      info->max_value <= 0 || info->max_value >= 65536) {
-    return 0;
-  }
-  info->bytes_per_px = info->depth * (info->max_value > 255 ? 2 : 1);
-  return off;
-}
-
-int ReadPNM(const uint8_t* const data, size_t data_size,
-            WebPPicture* const pic, int keep_alpha,
-            struct Metadata* const metadata) {
-  int ok = 0;
-  int i, j;
-  uint64_t stride, pixel_bytes, sample_size, depth;
-  uint8_t* rgb = NULL, *tmp_rgb;
-  size_t offset;
-  PNMInfo info;
-
-  info.data = data;
-  info.data_size = data_size;
-  offset = ReadHeader(&info);
-  if (offset == 0) {
-    fprintf(stderr, "Error parsing PNM header.\n");
-    goto End;
-  }
-
-  if (info.type < 5 || info.type > 7) {
-    fprintf(stderr, "Unsupported P%d PNM format.\n", info.type);
-    goto End;
-  }
-
-  // Some basic validations.
-  if (pic == NULL) goto End;
-  if (info.width > WEBP_MAX_DIMENSION || info.height > WEBP_MAX_DIMENSION) {
-    fprintf(stderr, "Invalid %dx%d dimension for PNM\n",
-                    info.width, info.height);
-    goto End;
-  }
-
-  pixel_bytes = (uint64_t)info.width * info.height * info.bytes_per_px;
-  if (data_size < offset + pixel_bytes) {
-    fprintf(stderr, "Truncated PNM file (P%d).\n", info.type);
-    goto End;
-  }
-  sample_size = (info.max_value > 255) ? 2 : 1;
-  // final depth
-  depth = (info.depth == 1 || info.depth == 3 || !keep_alpha) ? 3 : 4;
-  stride = depth * info.width;
-  if (stride != (size_t)stride ||
-      !ImgIoUtilCheckSizeArgumentsOverflow(stride, info.height)) {
-    goto End;
-  }
-
-  rgb = (uint8_t*)malloc((size_t)stride * info.height);
-  if (rgb == NULL) goto End;
-
-  // Convert input.
-  // We only optimize for the sample_size=1, max_value=255, depth=1 case.
-  tmp_rgb = rgb;
-  for (j = 0; j < info.height; ++j) {
-    const uint8_t* in = data + offset;
-    offset += info.bytes_per_px * info.width;
-    assert(offset <= data_size);
-    if (info.max_value == 255 && info.depth >= 3) {
-      // RGB or RGBA
-      if (info.depth == 3 || keep_alpha) {
-        memcpy(tmp_rgb, in, info.depth * info.width * sizeof(*in));
-      } else {
-        assert(info.depth == 4 && !keep_alpha);
-        for (i = 0; i < info.width; ++i) {
-          tmp_rgb[3 * i + 0] = in[4 * i + 0];
-          tmp_rgb[3 * i + 1] = in[4 * i + 1];
-          tmp_rgb[3 * i + 2] = in[4 * i + 2];
-        }
-      }
-    } else {
-      // Unoptimized case, we need to handle non-trivial operations:
-      //   * convert 16b to 8b (if max_value > 255)
-      //   * rescale to [0..255] range (if max_value != 255)
-      //   * drop the alpha channel (if keep_alpha is false)
-      const uint32_t round = info.max_value / 2;
-      int k = 0;
-      for (i = 0; i < info.width * info.depth; ++i) {
-        uint32_t v = (sample_size == 2) ? 256u * in[2 * i + 0] + in[2 * i + 1]
-                   : in[i];
-        if (info.max_value != 255) v = (v * 255u + round) / info.max_value;
-        if (v > 255u) v = 255u;
-        if (info.depth > 2) {
-          if (!keep_alpha && info.depth == 4 && (i % 4) == 3) {
-            // skip alpha
-          } else {
-            tmp_rgb[k] = v;
-            k += 1;
-          }
-        } else if (info.depth == 1 || (i % 2) == 0) {
-          tmp_rgb[k + 0] = tmp_rgb[k + 1] = tmp_rgb[k + 2] = v;
-          k += 3;
-        } else if (keep_alpha && info.depth == 2) {
-          tmp_rgb[k] = v;
-          k += 1;
-        } else {
-          // skip alpha
-        }
-      }
-    }
-    tmp_rgb += stride;
-  }
-
-  // WebP conversion.
-  pic->width = info.width;
-  pic->height = info.height;
-  ok = (depth == 4) ? WebPPictureImportRGBA(pic, rgb, (int)stride)
-                    : WebPPictureImportRGB(pic, rgb, (int)stride);
-  if (!ok) goto End;
-
-  ok = 1;
- End:
-  free((void*)rgb);
-
-  (void)metadata;
-  (void)keep_alpha;
-  return ok;
-}
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/pnmdec.h

@@ -1,37 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// partial PNM format decoder (ppm/pgm)
-
-#ifndef WEBP_IMAGEIO_PNMDEC_H_
-#define WEBP_IMAGEIO_PNMDEC_H_
-
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct Metadata;
-struct WebPPicture;
-
-// Reads a PNM file from 'data', returning the decoded output in 'pic'.
-// The output is RGB or YUV depending on pic->use_argb value.
-// Returns true on success.
-// 'metadata' has no effect, but is kept for coherence with other signatures
-// for image readers.
-int ReadPNM(const uint8_t* const data, size_t data_size,
-            struct WebPPicture* const pic, int keep_alpha,
-            struct Metadata* const metadata);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_PNMDEC_H_

external/libwebp/libwebp/imageio/tiffdec.c

@@ -1,293 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// TIFF decode.
-
-#include "./tiffdec.h"
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include <limits.h>
-#include <stdio.h>
-#include <string.h>
-
-#ifdef WEBP_HAVE_TIFF
-#include <tiffio.h>
-
-#include "webp/encode.h"
-#include "./imageio_util.h"
-#include "./metadata.h"
-
-static const struct {
-  ttag_t tag;
-  size_t storage_offset;
-} kTIFFMetadataMap[] = {
-  { TIFFTAG_ICCPROFILE, METADATA_OFFSET(iccp) },
-  { TIFFTAG_XMLPACKET,  METADATA_OFFSET(xmp) },
-  { 0, 0 },
-};
-
-// Returns true on success. The caller must use MetadataFree() on 'metadata' in
-// all cases.
-static int ExtractMetadataFromTIFF(TIFF* const tif, Metadata* const metadata) {
-  int i;
-  toff_t exif_ifd_offset;
-
-  for (i = 0; kTIFFMetadataMap[i].tag != 0; ++i) {
-    MetadataPayload* const payload =
-        (MetadataPayload*)((uint8_t*)metadata +
-                           kTIFFMetadataMap[i].storage_offset);
-    void* tag_data;
-    uint32_t tag_data_len;
-
-    if (TIFFGetField(tif, kTIFFMetadataMap[i].tag, &tag_data_len, &tag_data) &&
-        !MetadataCopy((const char*)tag_data, tag_data_len, payload)) {
-      return 0;
-    }
-  }
-
-  // TODO(jzern): To extract the raw EXIF directory some parsing of it would be
-  // necessary to determine the overall size. In addition, value offsets in
-  // individual directory entries may need to be updated as, depending on the
-  // type, they are file based.
-  // Exif 2.2 Section 4.6.2 Tag Structure
-  // TIFF Revision 6.0 Part 1 Section 2 TIFF Structure #Image File Directory
-  if (TIFFGetField(tif, TIFFTAG_EXIFIFD, &exif_ifd_offset)) {
-    fprintf(stderr, "Warning: EXIF extraction from TIFF is unsupported.\n");
-  }
-  return 1;
-}
-
-// Ad-hoc structure to supply read-from-memory functionalities.
-typedef struct {
-  const uint8_t* data;
-  toff_t size;
-  toff_t pos;
-} MyData;
-
-static int MyClose(thandle_t opaque) {
-  (void)opaque;
-  return 0;
-}
-
-static toff_t MySize(thandle_t opaque) {
-  const MyData* const my_data = (MyData*)opaque;
-  return my_data->size;
-}
-
-static toff_t MySeek(thandle_t opaque, toff_t offset, int whence) {
-  MyData* const my_data = (MyData*)opaque;
-  offset += (whence == SEEK_CUR) ? my_data->pos
-          : (whence == SEEK_SET) ? 0
-          : my_data->size;
-  if (offset > my_data->size) return (toff_t)-1;
-  my_data->pos = offset;
-  return offset;
-}
-
-static int MyMapFile(thandle_t opaque, void** base, toff_t* size) {
-  (void)opaque;
-  (void)base;
-  (void)size;
-  return 0;
-}
-static void MyUnmapFile(thandle_t opaque, void* base, toff_t size) {
-  (void)opaque;
-  (void)base;
-  (void)size;
-}
-
-static tsize_t MyRead(thandle_t opaque, void* dst, tsize_t size) {
-  MyData* const my_data = (MyData*)opaque;
-  if (my_data->pos + size > my_data->size) {
-    size = (tsize_t)(my_data->size - my_data->pos);
-  }
-  if (size > 0) {
-    memcpy(dst, my_data->data + my_data->pos, size);
-    my_data->pos += size;
-  }
-  return size;
-}
-
-// Unmultiply Argb data. Taken from dsp/alpha_processing
-// (we don't want to force a dependency to a libdspdec library).
-#define MFIX 24    // 24bit fixed-point arithmetic
-#define HALF ((1u << MFIX) >> 1)
-
-static uint32_t Unmult(uint8_t x, uint32_t mult) {
-  const uint32_t v = (x * mult + HALF) >> MFIX;
-  return (v > 255u) ? 255u : v;
-}
-
-static WEBP_INLINE uint32_t GetScale(uint32_t a) {
-  return (255u << MFIX) / a;
-}
-
-#undef MFIX
-#undef HALF
-
-static void MultARGBRow(uint8_t* ptr, int width) {
-  int x;
-  for (x = 0; x < width; ++x, ptr += 4) {
-    const uint32_t alpha = ptr[3];
-    if (alpha < 255) {
-      if (alpha == 0) {   // alpha == 0
-        ptr[0] = ptr[1] = ptr[2] = 0;
-      } else {
-        const uint32_t scale = GetScale(alpha);
-        ptr[0] = Unmult(ptr[0], scale);
-        ptr[1] = Unmult(ptr[1], scale);
-        ptr[2] = Unmult(ptr[2], scale);
-      }
-    }
-  }
-}
-
-int ReadTIFF(const uint8_t* const data, size_t data_size,
-             WebPPicture* const pic, int keep_alpha,
-             Metadata* const metadata) {
-  MyData my_data = { data, (toff_t)data_size, 0 };
-  TIFF* tif;
-  uint32_t image_width, image_height, tile_width, tile_height;
-  uint64_t stride;
-  uint16_t samples_per_px = 0;
-  uint16_t extra_samples = 0;
-  uint16_t* extra_samples_ptr = NULL;
-  uint32_t* raster;
-  int64_t alloc_size;
-  int ok = 0;
-  tdir_t dircount;
-
-  if (data == NULL || data_size == 0 || data_size > INT_MAX || pic == NULL) {
-    return 0;
-  }
-
-  tif = TIFFClientOpen("Memory", "r", &my_data,
-                       MyRead, MyRead, MySeek, MyClose,
-                       MySize, MyMapFile, MyUnmapFile);
-  if (tif == NULL) {
-    fprintf(stderr, "Error! Cannot parse TIFF file\n");
-    return 0;
-  }
-
-  dircount = TIFFNumberOfDirectories(tif);
-  if (dircount > 1) {
-    fprintf(stderr, "Warning: multi-directory TIFF files are not supported.\n"
-                    "Only the first will be used, %d will be ignored.\n",
-                    dircount - 1);
-  }
-  if (!TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &samples_per_px)) {
-    fprintf(stderr, "Error! Cannot retrieve TIFF samples-per-pixel info.\n");
-    goto End;
-  }
-  if (!(samples_per_px == 1 || samples_per_px == 3 || samples_per_px == 4)) {
-    goto End;  // not supported
-  }
-
-  if (!(TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &image_width) &&
-        TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &image_height))) {
-    fprintf(stderr, "Error! Cannot retrieve TIFF image dimensions.\n");
-    goto End;
-  }
-  stride = (uint64_t)image_width * sizeof(*raster);
-  if (!ImgIoUtilCheckSizeArgumentsOverflow(stride, image_height)) {
-    fprintf(stderr, "Error! TIFF image dimension (%d x %d) is too large.\n",
-            image_width, image_height);
-    goto End;
-  }
-
-  // According to spec, a tile can be bigger than the image. However it should
-  // be a multiple of 16 and not way too large, so check that it's not more
-  // than twice the image size, for dimensions above some arbitrary minimum
-  // 32. We also check that they respect WebP's dimension and memory limit.
-  // Note that a tile can be 6byte/px in some cases. Here we assume
-  // 4byte/px with sizeof(*raster), to be conservative.
-  if (TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tile_width) &&
-      TIFFGetField(tif, TIFFTAG_TILELENGTH, &tile_height)) {
-    if ((tile_width > 32 && tile_width / 2 > image_width) ||
-        (tile_height > 32 && tile_height / 2 > image_height) ||
-        !ImgIoUtilCheckSizeArgumentsOverflow(
-            (uint64_t)tile_width * sizeof(*raster), tile_height)) {
-      fprintf(stderr, "Error! TIFF tile dimension (%d x %d) is too large.\n",
-              tile_width, tile_height);
-      goto End;
-    }
-  }
-
-  if (samples_per_px > 3 && !TIFFGetField(tif, TIFFTAG_EXTRASAMPLES,
-                                          &extra_samples, &extra_samples_ptr)) {
-    fprintf(stderr, "Error! Cannot retrieve TIFF ExtraSamples info.\n");
-    goto End;
-  }
-
-  // _Tiffmalloc uses a signed type for size.
-  alloc_size = (int64_t)(stride * image_height);
-  if (alloc_size < 0 || alloc_size != (tsize_t)alloc_size) goto End;
-
-  raster = (uint32_t*)_TIFFmalloc((tsize_t)alloc_size);
-  if (raster != NULL) {
-    if (TIFFReadRGBAImageOriented(tif, image_width, image_height, raster,
-                                  ORIENTATION_TOPLEFT, 1)) {
-      pic->width = image_width;
-      pic->height = image_height;
-      // TIFF data is ABGR
-#ifdef WORDS_BIGENDIAN
-      TIFFSwabArrayOfLong(raster, image_width * image_height);
-#endif
-      // if we have an alpha channel, we must un-multiply from rgbA to RGBA
-      if (extra_samples == 1 && extra_samples_ptr != NULL &&
-          extra_samples_ptr[0] == EXTRASAMPLE_ASSOCALPHA) {
-        uint32_t y;
-        uint8_t* tmp = (uint8_t*)raster;
-        for (y = 0; y < image_height; ++y) {
-          MultARGBRow(tmp, image_width);
-          tmp += stride;
-        }
-      }
-      ok = keep_alpha
-         ? WebPPictureImportRGBA(pic, (const uint8_t*)raster, (int)stride)
-         : WebPPictureImportRGBX(pic, (const uint8_t*)raster, (int)stride);
-    }
-    _TIFFfree(raster);
-  } else {
-    fprintf(stderr, "Error allocating TIFF RGBA memory!\n");
-  }
-
-  if (ok) {
-    if (metadata != NULL) {
-      ok = ExtractMetadataFromTIFF(tif, metadata);
-      if (!ok) {
-        fprintf(stderr, "Error extracting TIFF metadata!\n");
-        MetadataFree(metadata);
-        WebPPictureFree(pic);
-      }
-    }
-  }
- End:
-  TIFFClose(tif);
-  return ok;
-}
-#else  // !WEBP_HAVE_TIFF
-int ReadTIFF(const uint8_t* const data, size_t data_size,
-             struct WebPPicture* const pic, int keep_alpha,
-             struct Metadata* const metadata) {
-  (void)data;
-  (void)data_size;
-  (void)pic;
-  (void)keep_alpha;
-  (void)metadata;
-  fprintf(stderr, "TIFF support not compiled. Please install the libtiff "
-          "development package before building.\n");
-  return 0;
-}
-#endif  // WEBP_HAVE_TIFF
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/tiffdec.h

@@ -1,37 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// TIFF decode.
-
-#ifndef WEBP_IMAGEIO_TIFFDEC_H_
-#define WEBP_IMAGEIO_TIFFDEC_H_
-
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct Metadata;
-struct WebPPicture;
-
-// Reads a TIFF from 'data', returning the decoded output in 'pic'.
-// Output is RGBA or YUVA, depending on pic->use_argb value.
-// If 'keep_alpha' is true and the TIFF has an alpha channel, the output is RGBA
-// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.
-// Returns true on success.
-int ReadTIFF(const uint8_t* const data, size_t data_size,
-             struct WebPPicture* const pic, int keep_alpha,
-             struct Metadata* const metadata);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_TIFFDEC_H_

external/libwebp/libwebp/imageio/webpdec.c

@@ -1,244 +0,0 @@
-// Copyright 2014 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// WebP decode.
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include "./webpdec.h"
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "webp/decode.h"
-#include "webp/demux.h"
-#include "webp/encode.h"
-#include "../examples/unicode.h"
-#include "./imageio_util.h"
-#include "./metadata.h"
-
-//------------------------------------------------------------------------------
-// WebP decoding
-
-static const char* const kStatusMessages[VP8_STATUS_NOT_ENOUGH_DATA + 1] = {
-  "OK", "OUT_OF_MEMORY", "INVALID_PARAM", "BITSTREAM_ERROR",
-  "UNSUPPORTED_FEATURE", "SUSPENDED", "USER_ABORT", "NOT_ENOUGH_DATA"
-};
-
-static void PrintAnimationWarning(const WebPDecoderConfig* const config) {
-  if (config->input.has_animation) {
-    fprintf(stderr,
-            "Error! Decoding of an animated WebP file is not supported.\n"
-            "       Use webpmux to extract the individual frames or\n"
-            "       vwebp to view this image.\n");
-  }
-}
-
-void PrintWebPError(const char* const in_file, int status) {
-  WFPRINTF(stderr, "Decoding of %s failed.\n", (const W_CHAR*)in_file);
-  fprintf(stderr, "Status: %d", status);
-  if (status >= VP8_STATUS_OK && status <= VP8_STATUS_NOT_ENOUGH_DATA) {
-    fprintf(stderr, "(%s)", kStatusMessages[status]);
-  }
-  fprintf(stderr, "\n");
-}
-
-int LoadWebP(const char* const in_file,
-             const uint8_t** data, size_t* data_size,
-             WebPBitstreamFeatures* bitstream) {
-  VP8StatusCode status;
-  WebPBitstreamFeatures local_features;
-  if (!ImgIoUtilReadFile(in_file, data, data_size)) return 0;
-
-  if (bitstream == NULL) {
-    bitstream = &local_features;
-  }
-
-  status = WebPGetFeatures(*data, *data_size, bitstream);
-  if (status != VP8_STATUS_OK) {
-    WebPFree((void*)*data);
-    *data = NULL;
-    *data_size = 0;
-    PrintWebPError(in_file, status);
-    return 0;
-  }
-  return 1;
-}
-
-//------------------------------------------------------------------------------
-
-VP8StatusCode DecodeWebP(const uint8_t* const data, size_t data_size,
-                         WebPDecoderConfig* const config) {
-  if (config == NULL) return VP8_STATUS_INVALID_PARAM;
-  PrintAnimationWarning(config);
-  return WebPDecode(data, data_size, config);
-}
-
-VP8StatusCode DecodeWebPIncremental(
-    const uint8_t* const data, size_t data_size,
-    WebPDecoderConfig* const config) {
-  VP8StatusCode status = VP8_STATUS_OK;
-  if (config == NULL) return VP8_STATUS_INVALID_PARAM;
-
-  PrintAnimationWarning(config);
-
-  // Decoding call.
-  {
-    WebPIDecoder* const idec = WebPIDecode(data, data_size, config);
-    if (idec == NULL) {
-      fprintf(stderr, "Failed during WebPIDecode().\n");
-      return VP8_STATUS_OUT_OF_MEMORY;
-    } else {
-      status = WebPIUpdate(idec, data, data_size);
-      WebPIDelete(idec);
-    }
-  }
-  return status;
-}
-
-// -----------------------------------------------------------------------------
-// Metadata
-
-static int ExtractMetadata(const uint8_t* const data, size_t data_size,
-                           Metadata* const metadata) {
-  WebPData webp_data = { data, data_size };
-  WebPDemuxer* const demux = WebPDemux(&webp_data);
-  WebPChunkIterator chunk_iter;
-  uint32_t flags;
-
-  if (demux == NULL) return 0;
-  assert(metadata != NULL);
-
-  flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS);
-
-  if ((flags & ICCP_FLAG) && WebPDemuxGetChunk(demux, "ICCP", 1, &chunk_iter)) {
-    MetadataCopy((const char*)chunk_iter.chunk.bytes, chunk_iter.chunk.size,
-                 &metadata->iccp);
-    WebPDemuxReleaseChunkIterator(&chunk_iter);
-  }
-  if ((flags & EXIF_FLAG) && WebPDemuxGetChunk(demux, "EXIF", 1, &chunk_iter)) {
-    MetadataCopy((const char*)chunk_iter.chunk.bytes, chunk_iter.chunk.size,
-                 &metadata->exif);
-    WebPDemuxReleaseChunkIterator(&chunk_iter);
-  }
-  if ((flags & XMP_FLAG) && WebPDemuxGetChunk(demux, "XMP ", 1, &chunk_iter)) {
-    MetadataCopy((const char*)chunk_iter.chunk.bytes, chunk_iter.chunk.size,
-                 &metadata->xmp);
-    WebPDemuxReleaseChunkIterator(&chunk_iter);
-  }
-  WebPDemuxDelete(demux);
-  return 1;
-}
-
-// -----------------------------------------------------------------------------
-
-int ReadWebP(const uint8_t* const data, size_t data_size,
-             WebPPicture* const pic,
-             int keep_alpha, Metadata* const metadata) {
-  int ok = 0;
-  VP8StatusCode status = VP8_STATUS_OK;
-  WebPDecoderConfig config;
-  WebPDecBuffer* const output_buffer = &config.output;
-  WebPBitstreamFeatures* const bitstream = &config.input;
-
-  if (data == NULL || data_size == 0 || pic == NULL) return 0;
-
-  if (!WebPInitDecoderConfig(&config)) {
-    fprintf(stderr, "Library version mismatch!\n");
-    return 0;
-  }
-
-  status = WebPGetFeatures(data, data_size, bitstream);
-  if (status != VP8_STATUS_OK) {
-    PrintWebPError("input data", status);
-    return 0;
-  }
-
-  do {
-    const int has_alpha = keep_alpha && bitstream->has_alpha;
-    uint64_t stride;
-    pic->width = bitstream->width;
-    pic->height = bitstream->height;
-    if (pic->use_argb) {
-      stride = (uint64_t)bitstream->width * 4;
-    } else {
-      stride = (uint64_t)bitstream->width * (has_alpha ? 5 : 3) / 2;
-      pic->colorspace = has_alpha ? WEBP_YUV420A : WEBP_YUV420;
-    }
-
-    if (!ImgIoUtilCheckSizeArgumentsOverflow(stride, bitstream->height)) {
-      status = VP8_STATUS_OUT_OF_MEMORY;
-      break;
-    }
-
-    ok = WebPPictureAlloc(pic);
-    if (!ok) {
-      status = VP8_STATUS_OUT_OF_MEMORY;
-      break;
-    }
-    if (pic->use_argb) {
-#ifdef WORDS_BIGENDIAN
-      output_buffer->colorspace = MODE_ARGB;
-#else
-      output_buffer->colorspace = MODE_BGRA;
-#endif
-      output_buffer->u.RGBA.rgba = (uint8_t*)pic->argb;
-      output_buffer->u.RGBA.stride = pic->argb_stride * sizeof(uint32_t);
-      output_buffer->u.RGBA.size = output_buffer->u.RGBA.stride * pic->height;
-    } else {
-      output_buffer->colorspace = has_alpha ? MODE_YUVA : MODE_YUV;
-      output_buffer->u.YUVA.y = pic->y;
-      output_buffer->u.YUVA.u = pic->u;
-      output_buffer->u.YUVA.v = pic->v;
-      output_buffer->u.YUVA.a = has_alpha ? pic->a : NULL;
-      output_buffer->u.YUVA.y_stride = pic->y_stride;
-      output_buffer->u.YUVA.u_stride = pic->uv_stride;
-      output_buffer->u.YUVA.v_stride = pic->uv_stride;
-      output_buffer->u.YUVA.a_stride = has_alpha ? pic->a_stride : 0;
-      output_buffer->u.YUVA.y_size = pic->height * pic->y_stride;
-      output_buffer->u.YUVA.u_size = (pic->height + 1) / 2 * pic->uv_stride;
-      output_buffer->u.YUVA.v_size = (pic->height + 1) / 2 * pic->uv_stride;
-      output_buffer->u.YUVA.a_size = pic->height * pic->a_stride;
-    }
-    output_buffer->is_external_memory = 1;
-
-    status = DecodeWebP(data, data_size, &config);
-    ok = (status == VP8_STATUS_OK);
-    if (ok && !keep_alpha && pic->use_argb) {
-      // Need to wipe out the alpha value, as requested.
-      int x, y;
-      uint32_t* argb = pic->argb;
-      for (y = 0; y < pic->height; ++y) {
-        for (x = 0; x < pic->width; ++x) argb[x] |= 0xff000000u;
-        argb += pic->argb_stride;
-      }
-    }
-  } while (0);   // <- so we can 'break' out of the loop
-
-  if (status != VP8_STATUS_OK) {
-    PrintWebPError("input data", status);
-    ok = 0;
-  }
-
-  WebPFreeDecBuffer(output_buffer);
-
-  if (ok && metadata != NULL) {
-    ok = ExtractMetadata(data, data_size, metadata);
-    if (!ok) {
-      PrintWebPError("metadata", VP8_STATUS_BITSTREAM_ERROR);
-    }
-  }
-  if (!ok) WebPPictureFree(pic);
-  return ok;
-}
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/webpdec.h

@@ -1,67 +0,0 @@
-// Copyright 2014 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// WebP decode.
-
-#ifndef WEBP_IMAGEIO_WEBPDEC_H_
-#define WEBP_IMAGEIO_WEBPDEC_H_
-
-#include "webp/decode.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct Metadata;
-struct WebPPicture;
-
-//------------------------------------------------------------------------------
-// WebP decoding
-
-// Prints an informative error message regarding decode failure of 'in_file'.
-// 'status' is treated as a VP8StatusCode and if valid will be printed as a
-// text string.
-void PrintWebPError(const char* const in_file, int status);
-
-// Reads a WebP from 'in_file', returning the contents and size in 'data' and
-// 'data_size'. If not NULL, 'bitstream' is populated using WebPGetFeatures().
-// Returns true on success.
-int LoadWebP(const char* const in_file,
-             const uint8_t** data, size_t* data_size,
-             WebPBitstreamFeatures* bitstream);
-
-// Decodes the WebP contained in 'data'.
-// 'config' is a structure previously initialized by WebPInitDecoderConfig().
-// 'config->output' should have the desired colorspace selected.
-// Returns the decoder status. On success 'config->output' will contain the
-// decoded picture.
-VP8StatusCode DecodeWebP(const uint8_t* const data, size_t data_size,
-                         WebPDecoderConfig* const config);
-
-// Same as DecodeWebP(), but using the incremental decoder.
-VP8StatusCode DecodeWebPIncremental(
-    const uint8_t* const data, size_t data_size,
-    WebPDecoderConfig* const config);
-
-//------------------------------------------------------------------------------
-
-// Decodes a WebP contained in 'data', returning the decoded output in 'pic'.
-// Output is RGBA or YUVA, depending on pic->use_argb value.
-// If 'keep_alpha' is true and the WebP has an alpha channel, the output is RGBA
-// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.
-// Returns true on success.
-int ReadWebP(const uint8_t* const data, size_t data_size,
-             struct WebPPicture* const pic,
-             int keep_alpha, struct Metadata* const metadata);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_WEBPDEC_H_

external/libwebp/libwebp/imageio/wicdec.c

@@ -1,413 +0,0 @@
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Windows Imaging Component (WIC) decode.
-
-#include "./wicdec.h"
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include <assert.h>
-#include <stdio.h>
-#include <string.h>
-
-#ifdef HAVE_WINCODEC_H
-#ifdef __MINGW32__
-#define INITGUID  // Without this GUIDs are declared extern and fail to link
-#endif
-#define CINTERFACE
-#define COBJMACROS
-#define _WIN32_IE 0x500  // Workaround bug in shlwapi.h when compiling C++
-                         // code with COBJMACROS.
-#include <ole2.h>  // CreateStreamOnHGlobal()
-#include <shlwapi.h>
-#include <tchar.h>
-#include <windows.h>
-#include <wincodec.h>
-
-#include "../examples/unicode.h"
-#include "./imageio_util.h"
-#include "./metadata.h"
-#include "webp/encode.h"
-
-#define IFS(fn)                                                     \
-  do {                                                              \
-    if (SUCCEEDED(hr)) {                                            \
-      hr = (fn);                                                    \
-      if (FAILED(hr)) fprintf(stderr, #fn " failed %08lx\n", hr);   \
-    }                                                               \
-  } while (0)
-
-// modified version of DEFINE_GUID from guiddef.h.
-#define WEBP_DEFINE_GUID(name, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
-  static const GUID name = \
-      { l, w1, w2, { b1, b2,  b3,  b4,  b5,  b6,  b7,  b8 } }
-
-#ifdef __cplusplus
-#define MAKE_REFGUID(x) (x)
-#else
-#define MAKE_REFGUID(x) &(x)
-#endif
-
-typedef struct WICFormatImporter {
-  const GUID* pixel_format;
-  int bytes_per_pixel;
-  int (*import)(WebPPicture* const, const uint8_t* const, int);
-} WICFormatImporter;
-
-// From Microsoft SDK 7.0a -- wincodec.h
-// Create local copies for compatibility when building against earlier
-// versions of the SDK.
-WEBP_DEFINE_GUID(GUID_WICPixelFormat24bppBGR_,
-                 0x6fddc324, 0x4e03, 0x4bfe,
-                 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0c);
-WEBP_DEFINE_GUID(GUID_WICPixelFormat24bppRGB_,
-                 0x6fddc324, 0x4e03, 0x4bfe,
-                 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0d);
-WEBP_DEFINE_GUID(GUID_WICPixelFormat32bppBGRA_,
-                 0x6fddc324, 0x4e03, 0x4bfe,
-                 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0f);
-WEBP_DEFINE_GUID(GUID_WICPixelFormat32bppRGBA_,
-                 0xf5c7ad2d, 0x6a8d, 0x43dd,
-                 0xa7, 0xa8, 0xa2, 0x99, 0x35, 0x26, 0x1a, 0xe9);
-WEBP_DEFINE_GUID(GUID_WICPixelFormat64bppBGRA_,
-                 0x1562ff7c, 0xd352, 0x46f9,
-                 0x97, 0x9e, 0x42, 0x97, 0x6b, 0x79, 0x22, 0x46);
-WEBP_DEFINE_GUID(GUID_WICPixelFormat64bppRGBA_,
-                 0x6fddc324, 0x4e03, 0x4bfe,
-                 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x16);
-
-static HRESULT OpenInputStream(const char* filename, IStream** stream) {
-  HRESULT hr = S_OK;
-  if (!WSTRCMP(filename, "-")) {
-    const uint8_t* data = NULL;
-    size_t data_size = 0;
-    const int ok = ImgIoUtilReadFile(filename, &data, &data_size);
-    if (ok) {
-      HGLOBAL image = GlobalAlloc(GMEM_MOVEABLE, data_size);
-      if (image != NULL) {
-        void* const image_mem = GlobalLock(image);
-        if (image_mem != NULL) {
-          memcpy(image_mem, data, data_size);
-          GlobalUnlock(image);
-          IFS(CreateStreamOnHGlobal(image, TRUE, stream));
-        } else {
-          hr = E_FAIL;
-        }
-      } else {
-        hr = E_OUTOFMEMORY;
-      }
-      free((void*)data);
-    } else {
-      hr = E_FAIL;
-    }
-  } else {
-    IFS(SHCreateStreamOnFile((const LPTSTR)filename, STGM_READ, stream));
-  }
-
-  if (FAILED(hr)) {
-    _ftprintf(stderr, _T("Error opening input file %s (%08lx)\n"),
-              (const LPTSTR)filename, hr);
-  }
-  return hr;
-}
-
-// -----------------------------------------------------------------------------
-// Metadata processing
-
-// Stores the first non-zero sized color profile from 'frame' to 'iccp'.
-// Returns an HRESULT to indicate success or failure. The caller is responsible
-// for freeing 'iccp->bytes' in either case.
-static HRESULT ExtractICCP(IWICImagingFactory* const factory,
-                           IWICBitmapFrameDecode* const frame,
-                           MetadataPayload* const iccp) {
-  HRESULT hr = S_OK;
-  UINT i, count;
-  IWICColorContext** color_contexts;
-
-  IFS(IWICBitmapFrameDecode_GetColorContexts(frame, 0, NULL, &count));
-  if (FAILED(hr) || count == 0) {
-    // Treat unsupported operation as a non-fatal error. See crbug.com/webp/506.
-    return (hr == WINCODEC_ERR_UNSUPPORTEDOPERATION) ? S_OK : hr;
-  }
-
-  color_contexts = (IWICColorContext**)calloc(count, sizeof(*color_contexts));
-  if (color_contexts == NULL) return E_OUTOFMEMORY;
-  for (i = 0; SUCCEEDED(hr) && i < count; ++i) {
-    IFS(IWICImagingFactory_CreateColorContext(factory, &color_contexts[i]));
-  }
-
-  if (SUCCEEDED(hr)) {
-    UINT num_color_contexts;
-    IFS(IWICBitmapFrameDecode_GetColorContexts(frame,
-                                               count, color_contexts,
-                                               &num_color_contexts));
-    assert(FAILED(hr) || num_color_contexts <= count);
-    for (i = 0; SUCCEEDED(hr) && i < num_color_contexts; ++i) {
-      WICColorContextType type;
-      IFS(IWICColorContext_GetType(color_contexts[i], &type));
-      if (SUCCEEDED(hr) && type == WICColorContextProfile) {
-        UINT size;
-        IFS(IWICColorContext_GetProfileBytes(color_contexts[i],
-                                             0, NULL, &size));
-        if (SUCCEEDED(hr) && size > 0) {
-          iccp->bytes = (uint8_t*)malloc(size);
-          if (iccp->bytes == NULL) {
-            hr = E_OUTOFMEMORY;
-            break;
-          }
-          iccp->size = size;
-          IFS(IWICColorContext_GetProfileBytes(color_contexts[i],
-                                               (UINT)iccp->size, iccp->bytes,
-                                               &size));
-          if (SUCCEEDED(hr) && size != iccp->size) {
-            fprintf(stderr, "Warning! ICC profile size (%u) != expected (%u)\n",
-                    size, (uint32_t)iccp->size);
-            iccp->size = size;
-          }
-          break;
-        }
-      }
-    }
-  }
-  for (i = 0; i < count; ++i) {
-    if (color_contexts[i] != NULL) IUnknown_Release(color_contexts[i]);
-  }
-  free(color_contexts);
-  return hr;
-}
-
-static HRESULT ExtractMetadata(IWICImagingFactory* const factory,
-                               IWICBitmapFrameDecode* const frame,
-                               Metadata* const metadata) {
-  // TODO(jzern): add XMP/EXIF extraction.
-  const HRESULT hr = ExtractICCP(factory, frame, &metadata->iccp);
-  if (FAILED(hr)) MetadataFree(metadata);
-  return hr;
-}
-
-// -----------------------------------------------------------------------------
-
-static int HasPalette(GUID pixel_format) {
-  return (IsEqualGUID(MAKE_REFGUID(pixel_format),
-                      MAKE_REFGUID(GUID_WICPixelFormat1bppIndexed)) ||
-          IsEqualGUID(MAKE_REFGUID(pixel_format),
-                      MAKE_REFGUID(GUID_WICPixelFormat2bppIndexed)) ||
-          IsEqualGUID(MAKE_REFGUID(pixel_format),
-                      MAKE_REFGUID(GUID_WICPixelFormat4bppIndexed)) ||
-          IsEqualGUID(MAKE_REFGUID(pixel_format),
-                      MAKE_REFGUID(GUID_WICPixelFormat8bppIndexed)));
-}
-
-static int HasAlpha(IWICImagingFactory* const factory,
-                    IWICBitmapDecoder* const decoder,
-                    IWICBitmapFrameDecode* const frame,
-                    GUID pixel_format) {
-  int has_alpha;
-  if (HasPalette(pixel_format)) {
-    IWICPalette* frame_palette = NULL;
-    IWICPalette* global_palette = NULL;
-    BOOL frame_palette_has_alpha = FALSE;
-    BOOL global_palette_has_alpha = FALSE;
-
-    // A palette may exist at the frame or container level,
-    // check IWICPalette::HasAlpha() for both if present.
-    if (SUCCEEDED(IWICImagingFactory_CreatePalette(factory, &frame_palette)) &&
-        SUCCEEDED(IWICBitmapFrameDecode_CopyPalette(frame, frame_palette))) {
-      IWICPalette_HasAlpha(frame_palette, &frame_palette_has_alpha);
-    }
-    if (SUCCEEDED(IWICImagingFactory_CreatePalette(factory, &global_palette)) &&
-        SUCCEEDED(IWICBitmapDecoder_CopyPalette(decoder, global_palette))) {
-      IWICPalette_HasAlpha(global_palette, &global_palette_has_alpha);
-    }
-    has_alpha = frame_palette_has_alpha || global_palette_has_alpha;
-
-    if (frame_palette != NULL) IUnknown_Release(frame_palette);
-    if (global_palette != NULL) IUnknown_Release(global_palette);
-  } else {
-    has_alpha = IsEqualGUID(MAKE_REFGUID(pixel_format),
-                            MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA_)) ||
-                IsEqualGUID(MAKE_REFGUID(pixel_format),
-                            MAKE_REFGUID(GUID_WICPixelFormat32bppBGRA_)) ||
-                IsEqualGUID(MAKE_REFGUID(pixel_format),
-                            MAKE_REFGUID(GUID_WICPixelFormat64bppRGBA_)) ||
-                IsEqualGUID(MAKE_REFGUID(pixel_format),
-                            MAKE_REFGUID(GUID_WICPixelFormat64bppBGRA_));
-  }
-  return has_alpha;
-}
-
-int ReadPictureWithWIC(const char* const filename,
-                       WebPPicture* const pic, int keep_alpha,
-                       Metadata* const metadata) {
-  // From Microsoft SDK 6.0a -- ks.h
-  // Define a local copy to avoid link errors under mingw.
-  WEBP_DEFINE_GUID(GUID_NULL_, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-  static const WICFormatImporter kAlphaFormatImporters[] = {
-    { &GUID_WICPixelFormat32bppBGRA_, 4, WebPPictureImportBGRA },
-    { &GUID_WICPixelFormat32bppRGBA_, 4, WebPPictureImportRGBA },
-    { NULL, 0, NULL },
-  };
-  static const WICFormatImporter kNonAlphaFormatImporters[] = {
-    { &GUID_WICPixelFormat24bppBGR_, 3, WebPPictureImportBGR },
-    { &GUID_WICPixelFormat24bppRGB_, 3, WebPPictureImportRGB },
-    { NULL, 0, NULL },
-  };
-  HRESULT hr = S_OK;
-  IWICBitmapFrameDecode* frame = NULL;
-  IWICFormatConverter* converter = NULL;
-  IWICImagingFactory* factory = NULL;
-  IWICBitmapDecoder* decoder = NULL;
-  IStream* stream = NULL;
-  UINT frame_count = 0;
-  UINT width = 0, height = 0;
-  BYTE* rgb = NULL;
-  WICPixelFormatGUID src_pixel_format = GUID_WICPixelFormatUndefined;
-  const WICFormatImporter* importer = NULL;
-  GUID src_container_format = GUID_NULL_;
-  // From Windows Kits\10\Include\10.0.19041.0\um\wincodec.h
-  WEBP_DEFINE_GUID(GUID_ContainerFormatWebp_,
-                   0xe094b0e2, 0x67f2, 0x45b3,
-                   0xb0, 0xea, 0x11, 0x53, 0x37, 0xca, 0x7c, 0xf3);
-  static const GUID* kAlphaContainers[] = {
-    &GUID_ContainerFormatBmp,
-    &GUID_ContainerFormatPng,
-    &GUID_ContainerFormatTiff,
-    &GUID_ContainerFormatWebp_,
-    NULL
-  };
-  int has_alpha = 0;
-  int64_t stride;
-
-  if (filename == NULL || pic == NULL) return 0;
-
-  IFS(CoInitialize(NULL));
-  IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
-                       CLSCTX_INPROC_SERVER,
-                       MAKE_REFGUID(IID_IWICImagingFactory),
-                       (LPVOID*)&factory));
-  if (hr == REGDB_E_CLASSNOTREG) {
-    fprintf(stderr,
-            "Couldn't access Windows Imaging Component (are you running "
-            "Windows XP SP3 or newer?). Most formats not available. "
-            "Use -s for the available YUV input.\n");
-  }
-  // Prepare for image decoding.
-  IFS(OpenInputStream(filename, &stream));
-  IFS(IWICImagingFactory_CreateDecoderFromStream(
-          factory, stream, NULL,
-          WICDecodeMetadataCacheOnDemand, &decoder));
-  IFS(IWICBitmapDecoder_GetFrameCount(decoder, &frame_count));
-  if (SUCCEEDED(hr)) {
-    if (frame_count == 0) {
-      fprintf(stderr, "No frame found in input file.\n");
-      hr = E_FAIL;
-    } else if (frame_count > 1) {
-      // WIC will be tried before native WebP decoding so avoid duplicating the
-      // error message.
-      hr = E_FAIL;
-    }
-  }
-  IFS(IWICBitmapDecoder_GetFrame(decoder, 0, &frame));
-  IFS(IWICBitmapFrameDecode_GetPixelFormat(frame, &src_pixel_format));
-  IFS(IWICBitmapDecoder_GetContainerFormat(decoder, &src_container_format));
-
-  if (SUCCEEDED(hr) && keep_alpha) {
-    const GUID** guid;
-    for (guid = kAlphaContainers; *guid != NULL; ++guid) {
-      if (IsEqualGUID(MAKE_REFGUID(src_container_format),
-                      MAKE_REFGUID(**guid))) {
-        has_alpha = HasAlpha(factory, decoder, frame, src_pixel_format);
-        break;
-      }
-    }
-  }
-
-  // Prepare for pixel format conversion (if necessary).
-  IFS(IWICImagingFactory_CreateFormatConverter(factory, &converter));
-
-  for (importer = has_alpha ? kAlphaFormatImporters : kNonAlphaFormatImporters;
-       hr == S_OK && importer->import != NULL; ++importer) {
-    BOOL can_convert;
-    const HRESULT cchr = IWICFormatConverter_CanConvert(
-        converter,
-        MAKE_REFGUID(src_pixel_format),
-        MAKE_REFGUID(*importer->pixel_format),
-        &can_convert);
-    if (SUCCEEDED(cchr) && can_convert) break;
-  }
-  if (importer->import == NULL) hr = E_FAIL;
-
-  IFS(IWICFormatConverter_Initialize(converter, (IWICBitmapSource*)frame,
-                                     importer->pixel_format,
-                                     WICBitmapDitherTypeNone,
-                                     NULL, 0.0, WICBitmapPaletteTypeCustom));
-
-  // Decode.
-  IFS(IWICFormatConverter_GetSize(converter, &width, &height));
-  stride = (int64_t)importer->bytes_per_pixel * width * sizeof(*rgb);
-  if (stride != (int)stride ||
-      !ImgIoUtilCheckSizeArgumentsOverflow(stride, height)) {
-    hr = E_FAIL;
-  }
-
-  if (SUCCEEDED(hr)) {
-    rgb = (BYTE*)malloc((size_t)stride * height);
-    if (rgb == NULL)
-      hr = E_OUTOFMEMORY;
-  }
-  IFS(IWICFormatConverter_CopyPixels(converter, NULL,
-                                     (UINT)stride, (UINT)stride * height, rgb));
-
-  // WebP conversion.
-  if (SUCCEEDED(hr)) {
-    int ok;
-    pic->width = width;
-    pic->height = height;
-    pic->use_argb = 1;    // For WIC, we always force to argb
-    ok = importer->import(pic, rgb, (int)stride);
-    if (!ok) hr = E_FAIL;
-  }
-  if (SUCCEEDED(hr)) {
-    if (metadata != NULL) {
-      hr = ExtractMetadata(factory, frame, metadata);
-      if (FAILED(hr)) {
-        fprintf(stderr, "Error extracting image metadata using WIC!\n");
-      }
-    }
-  }
-
-  // Cleanup.
-  if (converter != NULL) IUnknown_Release(converter);
-  if (frame != NULL) IUnknown_Release(frame);
-  if (decoder != NULL) IUnknown_Release(decoder);
-  if (factory != NULL) IUnknown_Release(factory);
-  if (stream != NULL) IUnknown_Release(stream);
-  free(rgb);
-  return SUCCEEDED(hr);
-}
-#else  // !HAVE_WINCODEC_H
-int ReadPictureWithWIC(const char* const filename,
-                       struct WebPPicture* const pic, int keep_alpha,
-                       struct Metadata* const metadata) {
-  (void)filename;
-  (void)pic;
-  (void)keep_alpha;
-  (void)metadata;
-  fprintf(stderr, "Windows Imaging Component (WIC) support not compiled. "
-                  "Visual Studio and mingw-w64 builds support WIC. Make sure "
-                  "wincodec.h detection is working correctly if using autoconf "
-                  "and HAVE_WINCODEC_H is defined before building.\n");
-  return 0;
-}
-#endif  // HAVE_WINCODEC_H
-
-// -----------------------------------------------------------------------------

external/libwebp/libwebp/imageio/wicdec.h

@@ -1,34 +0,0 @@
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Windows Imaging Component (WIC) decode.
-
-#ifndef WEBP_IMAGEIO_WICDEC_H_
-#define WEBP_IMAGEIO_WICDEC_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct Metadata;
-struct WebPPicture;
-
-// Reads an image from 'filename', returning the decoded output in 'pic'.
-// If 'keep_alpha' is true and the image has an alpha channel, the output is
-// RGBA otherwise it will be RGB. pic->use_argb is always forced to true.
-// Returns true on success.
-int ReadPictureWithWIC(const char* const filename,
-                       struct WebPPicture* const pic, int keep_alpha,
-                       struct Metadata* const metadata);
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  // WEBP_IMAGEIO_WICDEC_H_

external/libwebp/libwebp/infra/common.sh

@@ -1,106 +0,0 @@
-# Copyright (c) 2021, Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#   * Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#
-#   * Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.
-#
-#   * Neither the name of Google nor the names of its contributors may
-#     be used to endorse or promote products derived from this software
-#     without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-log_err() {
-  echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: $*" >&2
-}
-
-#######################################
-# Create build directory. Build directory will be deleted if it exists.
-# Arguments:
-#   None.
-# Returns:
-#   mkdir result.
-#######################################
-make_build_dir() {
-  if [[ "$#" -ne 1 ]]; then
-    return 1
-  fi
-
-  local build_dir
-  build_dir="$1"
-  rm -rf "${build_dir}"
-  mkdir -p "${build_dir}"
-}
-
-#######################################
-# Cleanup files from the build directory.
-# Globals:
-#   LIBWEBP_ROOT repository's root path.
-# Arguments:
-#   $1 build directory.
-#######################################
-cleanup() {
-  # $1 is not completely removed to allow for binary artifacts to be
-  # extracted.
-  find "${1:?"Build directory not defined"}" \
-    \( -name "*.[ao]" -o -name "*.l[ao]" \) -exec rm -f {} +
-}
-
-#######################################
-# Setup ccache for toolchain.
-# Globals:
-#   PATH
-# Arguments:
-#   None.
-#######################################
-setup_ccache() {
-  if [[ -x "$(command -v ccache)" ]]; then
-    export CCACHE_CPP2=yes
-    export PATH="/usr/lib/ccache:${PATH}"
-  fi
-}
-
-#######################################
-# Detects whether test block should be run in the current test shard.
-# Globals:
-#   TEST_TOTAL_SHARDS: Valid range: [1, N]. Defaults to 1.
-#   TEST_SHARD_INDEX: Valid range: [0, TEST_TOTAL_SHARDS). Defaults to 0.
-#   libwebp_test_id: current test number; incremented with each call.
-# Arguments:
-#   None
-# Returns:
-#   true if the shard is active
-#   false if the shard is inactive
-#######################################
-shard_should_run() {
-  TEST_TOTAL_SHARDS=${TEST_TOTAL_SHARDS:=1}
-  TEST_SHARD_INDEX=${TEST_SHARD_INDEX:=0}
-  libwebp_test_id=${libwebp_test_id:=-1}
-  : $((libwebp_test_id += 1))
-
-  if [[ "${TEST_SHARD_INDEX}" -lt 0 ||
-    "${TEST_SHARD_INDEX}" -ge "${TEST_TOTAL_SHARDS}" ]]; then
-    log_err "Invalid TEST_SHARD_INDEX (${TEST_SHARD_INDEX})!" \
-      "Expected [0, ${TEST_TOTAL_SHARDS})."
-  fi
-
-  [[ "$((libwebp_test_id % TEST_TOTAL_SHARDS))" -eq "${TEST_SHARD_INDEX}" ]]
-}

external/libwebp/libwebp/infra/compile.sh

@@ -1,401 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2021, Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#   * Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#
-#   * Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.
-#
-#   * Neither the name of Google nor the names of its contributors may
-#     be used to endorse or promote products derived from this software
-#     without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set -xe
-LIBWEBP_ROOT="$(realpath "$(dirname "$0")/..")"
-WORKSPACE=${WORKSPACE:-"$(mktemp -d -t webp.XXX)"}
-
-# shellcheck source=infra/common.sh
-source "${LIBWEBP_ROOT}/infra/common.sh"
-
-usage() {
-  cat << EOF
-Usage: compile.sh BUILD_TYPE TARGET
-Options:
-BUILD_TYPE  supported build type: (shared, static, static-debug)
-TARGET      supported target platforms:
-              aarch64-linux-clang
-              aarch64-linux-gnu
-              arm-linux-gnueabi
-              arm-neon-linux-gnueabi
-              cmake
-              cmake-aarch64
-              cmake-arm
-              cmake-clang
-              disable-near-lossless
-              disable-sse4.1
-              disable-stats
-              force-aligned-32
-              force-aligned-64
-              gradle
-              i686-linux-asan
-              i686-linux-clang
-              i686-linux-gnu
-              i686-w64-mingw32
-              mips2el-linux-gnu
-              mips32dspr2el-linux-gnu
-              mips32eb-linux-gnu
-              mips32el-linux-gnu
-              mips32r2el-linux-gnu
-              mips32r5el-linux-gnu
-              mips64r2el-linux-gnu
-              mips64r6el-linux-gnu
-              native
-              reduce-csp
-              reduce-size
-              reduce-size-disable-stats
-              visibility-default-gnu
-              visibility-hidden-clang
-              visibility-hidden-gnu
-              wasm
-              x86_64-linux-clang
-              x86_64-linux-gnu
-              x86_64-linux-msan
-              x86_64-w64-mingw32
-Environment variables:
-WORKSPACE   directory where the build is done
-EOF
-}
-
-################################################################################
-echo "Building libwebp in ${WORKSPACE}"
-
-if [[ ! -d "${WORKSPACE}" ]]; then
-  log_err "${WORKSPACE} directory does not exist"
-  exit 1
-fi
-
-BUILD_TYPE=${1:?"Build type not defined.$(
-  echo
-  usage
-)"}
-TARGET=${2:?"Target not defined.$(
-  echo
-  usage
-)"}
-readonly BUILD_DIR="${WORKSPACE}/build-${BUILD_TYPE}"
-
-trap 'cleanup ${BUILD_DIR}' EXIT
-make_build_dir "${BUILD_DIR}"
-
-config_flags=()
-case "${BUILD_TYPE}" in
-  shared*) ;;  # Valid BUILD_TYPE but no setup required
-  static*) config_flags+=("--disable-shared") ;;
-  experimental) config_flags+=("--enable-experimental") ;;
-  *)
-    log_err "Invalid BUILD_TYPE"
-    usage
-    exit 1
-    ;;
-esac
-
-if grep -m 1 -q "enable-asserts" "${LIBWEBP_ROOT}/configure.ac"; then
-  config_flags+=("--enable-asserts")
-fi
-
-case "${TARGET}" in
-  aarch64-linux-clang)
-    TARGET="aarch64-linux-gnu"
-    CC="clang"
-    CC="${CC} --target=aarch64-linux-gnu"
-    export CC
-    export CFLAGS="-isystem /usr/aarch64-linux-gnu/include"
-    ;;
-  arm-linux-gnueabi)
-    export CFLAGS="-O3 -march=armv7-a -mfloat-abi=softfp -ftree-vectorize"
-    ;;
-  arm-neon-linux-gnueabi)
-    TARGET="arm-linux-gnueabi"
-    CFLAGS="-O3 -march=armv7-a -mfpu=neon -mfloat-abi=softfp -ftree-vectorize"
-    export CFLAGS
-    ;;
-  mips2el-linux-gnu)
-    export CFLAGS="-EL -O2 -mips2"
-    TARGET="mipsel-linux-gnu"
-    ;;
-  mips32el-linux-gnu)
-    export CFLAGS="-EL -O2 -mips32"
-    TARGET="mipsel-linux-gnu"
-    ;;
-  mips32r2el-linux-gnu)
-    export CFLAGS="-EL -O2 -mips32r2"
-    TARGET="mipsel-linux-gnu"
-    ;;
-  mips32dspr2el-linux-gnu)
-    export CFLAGS="-EL -O2 -mdspr2"
-    TARGET="mipsel-linux-gnu"
-    ;;
-  mips32r5el-linux-gnu)
-    export CFLAGS="-EL -O2 -mips32r5 -mmsa"
-    TARGET="mipsel-linux-gnu"
-    ;;
-  mips32eb-linux-gnu)
-    export CFLAGS="-EB -O2 -mips32"
-    TARGET="mips-linux-gnu"
-    ;;
-  mips64r2el-linux-gnu)
-    export CFLAGS="-EL -O2 -mips64r2 -mabi=64"
-    TARGET="mips64el-linux-gnuabi64"
-    ;;
-  mips64r6el-linux-gnu)
-    export CFLAGS="-EL -O2 -mips64r6 -mabi=64 -mmsa"
-    TARGET="mips-img-linux-gnu"
-    ;;
-  i686-linux-gnu)
-    export CC="gcc -m32"
-    ;;
-  i686-linux-clang)
-    TARGET="i686-linux-gnu"
-    export CC="clang -m32"
-    ;;
-  i686-linux-asan)
-    TARGET="i686-linux-gnu"
-    export CC="clang -m32 -fsanitize=address"
-    ;;
-  i686-linux-msan)
-    TARGET="i686-linux-gnu"
-    export CC="clang -m32 -fsanitize=memory"
-    ;;
-  x86_64-linux-clang)
-    TARGET="x86_64-linux-gnu"
-    export CC=clang
-    ;;
-  x86_64-linux-msan)
-    TARGET="x86_64-linux-gnu"
-    export CC="clang -fsanitize=memory"
-    ;;
-  force-aligned-32)
-    config_flags+=("--enable-aligned")
-    TARGET="i686-linux-gnu"
-    export CC="gcc -m32"
-    ;;
-  force-aligned-64)
-    config_flags+=("--enable-aligned")
-    TARGET="x86_64-linux-gnu"
-    ;;
-  visibility-default-*)
-    export CFLAGS="-O2 -g -fvisibility=default"
-    TARGET="x86_64-linux-gnu"
-    ;;
-  visibility-hidden-*)
-    export CFLAGS="-O2 -g -fvisibility=hidden"
-    if [[ "${TARGET}" = "visibility-hidden-clang" ]]; then
-      export CC=clang
-    fi
-    TARGET="x86_64-linux-gnu"
-    ;;
-  disable-sse4.1)
-    grep "${TARGET}" "${LIBWEBP_ROOT}/configure.ac" || exit 0
-    config_flags+=("--${TARGET}")
-    TARGET="x86_64-linux-gnu"
-    ;;
-  disable-near-lossless)
-    grep "${TARGET}" "${LIBWEBP_ROOT}/configure.ac" || exit 0
-    config_flags+=("--${TARGET}")
-    TARGET="x86_64-linux-gnu"
-    ;;
-  disable-stats)
-    git -C "${LIBWEBP_ROOT}" grep WEBP_DISABLE_STATS || exit 0
-    export CFLAGS="-O2 -g -DWEBP_DISABLE_STATS"
-    TARGET="x86_64-linux-gnu"
-    ;;
-  reduce-size)
-    git -C "${LIBWEBP_ROOT}" grep WEBP_REDUCE_SIZE || exit 0
-    export CFLAGS="-O2 -g -DWEBP_REDUCE_SIZE"
-    TARGET="x86_64-linux-gnu"
-    ;;
-  reduce-size-disable-stats)
-    git -C "${LIBWEBP_ROOT}" grep -e WEBP_DISABLE_STATS -e WEBP_REDUCE_SIZE \
-      || exit 0
-    export CFLAGS="-O2 -g -DWEBP_DISABLE_STATS -DWEBP_REDUCE_SIZE"
-    TARGET="x86_64-linux-gnu"
-    ;;
-  reduce-csp)
-    git -C "${LIBWEBP_ROOT}" grep WEBP_REDUCE_CSP || exit 0
-    export CFLAGS="-O2 -g -DWEBP_REDUCE_CSP"
-    TARGET="x86_64-linux-gnu"
-    ;;
-  x86_64-linux-gnu | *mingw32 | aarch64*) ;;  # Default target configuration
-  # non-configure based builds
-  native)
-    setup_ccache
-    # exercise makefile.unix then quit
-    make -C "${LIBWEBP_ROOT}" -f makefile.unix -j all
-    for tgt in extras examples/anim_diff; do
-      grep -q -m 1 "${tgt}" "${LIBWEBP_ROOT}/makefile.unix" \
-        && make -C "${LIBWEBP_ROOT}" -f makefile.unix -j "${tgt}"
-    done
-    [[ -d "${LIBWEBP_ROOT}/tests/fuzzer" ]] \
-      && make -j -C "${LIBWEBP_ROOT}/tests/fuzzer" -f makefile.unix
-    exit 0
-    ;;
-  cmake*)
-    setup_ccache
-    # exercise cmake then quit
-    opts=()
-    case "${TARGET}" in
-      cmake-clang)
-        opts+=("-DCMAKE_C_COMPILER=clang")
-        ;;
-      cmake-arm)
-        opts+=("-DCMAKE_C_COMPILER=arm-linux-gnueabi-gcc")
-        case "${GERRIT_BRANCH:-}" in
-          portable-intrinsics | 0.6.1) exit 0 ;;
-          *) ;;  # Skip configuration
-        esac
-        ;;
-      cmake-aarch64)
-        opts+=("-DCMAKE_C_COMPILER=aarch64-linux-gnu-gcc")
-        case "${GERRIT_BRANCH:-}" in
-          portable-intrinsics | 0.6.1) exit 0 ;;
-          *) ;;  # Skip configuration
-        esac
-        ;;
-      *) ;;  # Skip configuration
-    esac
-    case "${BUILD_TYPE}" in
-      static*)
-        opts+=("-DBUILD_SHARED_LIBS=OFF")
-        ;;
-      experimental)
-        opts+=("-DWEBP_EXPERIMENTAL_FEATURES=ON" "-DBUILD_SHARED_LIBS=ON")
-        ;;
-      *)
-        opts+=("-DBUILD_SHARED_LIBS=ON")
-        ;;
-    esac
-    case "${BUILD_TYPE}" in
-      *debug) opts+=("-DCMAKE_BUILD_TYPE=Debug") ;;
-      *) opts+=("-DCMAKE_BUILD_TYPE=RelWithDebInfo") ;;
-    esac
-    cd "${BUILD_DIR}"
-    opts+=("-DWEBP_BUILD_CWEBP=ON" "-DWEBP_BUILD_DWEBP=ON")
-    grep -m 1 -q WEBP_BUILD_GIF2WEBP "${LIBWEBP_ROOT}/CMakeLists.txt" \
-      && opts+=("-DWEBP_BUILD_GIF2WEBP=ON")
-    grep -m 1 -q WEBP_BUILD_IMG2WEBP "${LIBWEBP_ROOT}/CMakeLists.txt" \
-      && opts+=("-DWEBP_BUILD_IMG2WEBP=ON")
-    cmake "${opts[@]}" "${LIBWEBP_ROOT}"
-    make VERBOSE=1 -j
-    case "${BUILD_TYPE}" in
-      static)
-        mkdir -p examples
-        cp [cd]webp examples
-        ;;
-      *) ;;  # Skip configuration.
-    esac
-
-    grep "install" "${LIBWEBP_ROOT}/CMakeLists.txt" || exit 0
-
-    make DESTDIR="${BUILD_DIR}/webp-install" install/strip
-    mkdir tmp
-    cd tmp
-    cat > CMakeLists.txt << EOF
-cmake_minimum_required(VERSION 2.8.7)
-
-project(libwebp C)
-
-find_package(WebP)
-if (NOT WebP_FOUND)
-  message(FATAL_ERROR "WebP package not found")
-endif ()
-message("WebP_FOUND: \${WebP_FOUND}")
-message("WebP_INCLUDE_DIRS: \${WebP_INCLUDE_DIRS}")
-message("WebP_LIBRARIES: \${WebP_LIBRARIES}")
-message("WEBP_INCLUDE_DIRS: \${WEBP_INCLUDE_DIRS}")
-message("WEBP_LIBRARIES: \${WEBP_LIBRARIES}")
-EOF
-    cmake . "${opts[@]}" \
-      "-DCMAKE_PREFIX_PATH=${BUILD_DIR}/webp-install/usr/local"
-    exit 0
-    ;;
-  gradle)
-    setup_ccache
-    # exercise gradle then quit
-    [[ -f "${LIBWEBP_ROOT}/gradlew" ]] || exit 0
-
-    cd "${BUILD_DIR}"
-    # TODO -g / --gradle-user-home could be used if there's a race between jobs
-    "${LIBWEBP_ROOT}/gradlew" -p "${LIBWEBP_ROOT}" buildAllExecutables
-    exit 0
-    ;;
-  wasm)
-    grep -m 1 -q WEBP_ENABLE_WASM "${LIBWEBP_ROOT}/CMakeLists.txt" || exit 0
-    opts+=("-DCMAKE_C_COMPILER=clang" "-DWEBP_ENABLE_WASM=ON")
-    opts+=("-DWEBP_BUILD_CWEBP=ON" "-DWEBP_BUILD_DWEBP=ON")
-    case "${BUILD_TYPE}" in
-      *debug) opts+=("-DCMAKE_BUILD_TYPE=Debug") ;;
-      *) opts+=("-DCMAKE_BUILD_TYPE=RelWithDebInfo") ;;
-    esac
-    cd "${BUILD_DIR}"
-    cmake "${opts[@]}" "${LIBWEBP_ROOT}"
-    make VERBOSE=1 -j
-    mkdir examples
-    case "${BUILD_TYPE}" in
-      static)
-        mkdir -p examples
-        cp [cd]webp examples
-        ;;
-      *) ;;  # Skip configuration
-    esac
-    exit 0
-    ;;
-  *)
-    log_err "Invalid TARGET"
-    usage
-    exit 1
-    ;;
-esac
-
-case "${TARGET}" in
-  *mingw32) ;;  # Skip configuration
-  *)
-    case "${TARGET}-${CC}" in
-      static-debug-gcc* | static-debug-)
-        CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage -O0 -g"
-        CXXFLAGS="${CXXFLAGS} -fprofile-arcs -ftest-coverage -O0 -g"
-        export CFLAGS CXXFLAGS
-        ;;
-      *) ;;  # This case should not be reached.
-    esac
-    ;;
-esac
-
-setup_ccache
-
-cd "${LIBWEBP_ROOT}"
-./autogen.sh
-
-cd "${BUILD_DIR}"
-"${LIBWEBP_ROOT}/configure" \
-  --host "${TARGET}" --build "$("${LIBWEBP_ROOT}/config.guess")" \
-  --enable-everything "${config_flags[@]}"
-make -j V=1

external/libwebp/libwebp/infra/compile_android.sh

@@ -1,224 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2021, Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#   * Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#
-#   * Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.
-#
-#   * Neither the name of Google nor the names of its contributors may
-#     be used to endorse or promote products derived from this software
-#     without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set -xe
-LIBWEBP_ROOT="$(realpath "$(dirname "$0")/..")"
-readonly LIBWEBP_ROOT
-readonly WORKSPACE=${WORKSPACE:-"$(mktemp -d -t webp.android.XXX)"}
-# shellcheck source=infra/common.sh
-source "${LIBWEBP_ROOT}/infra/common.sh"
-
-usage() {
-  cat << EOF
-Usage: $(basename "$0") BUILD_TYPE APP_ABI
-Options:
-BUILD_TYPE  supported build types:
-              static
-              static-debug
-              shared
-              shared-debug
-APP_ABI     supported application binary interfaces:
-              armeabi-v7a
-              arm64-v8a
-              x86
-              x86_64
-Environment variables:
-WORKSPACE   directory where the build is done.
-ANDROID_NDK_DIR directory where the android ndk tools are.
-EOF
-}
-
-################################################################################
-echo "Building libwebp for Android in ${WORKSPACE}"
-
-if [[ ! -d "${WORKSPACE}" ]]; then
-  log_err "${WORKSPACE} directory does not exist."
-  exit 1
-fi
-
-readonly BUILD_TYPE=${1:?"BUILD_TYPE is not defined.$(
-  echo
-  usage
-)"}
-readonly APP_ABI=${2:?"APP_ABI not defined.$(
-  echo
-  usage
-)"}
-readonly ANDROID_NDK_DIR=${ANDROID_NDK_DIR:?"ANDROID_NDK_DIR is not defined.$(
-  echo
-  usage
-)"}
-readonly BUILD_DIR="${WORKSPACE}/build-${BUILD_TYPE}"
-readonly STANDALONE_ANDROID_DIR="${WORKSPACE}/android"
-
-if [[ ! -x "${ANDROID_NDK_DIR}/ndk-build" ]]; then
-  log_err "unable to find ndk-build in ANDROID_NDK_DIR: ${ANDROID_NDK_DIR}."
-  exit 1
-fi
-
-CFLAGS=
-LDFLAGS=
-opts=()
-case "${BUILD_TYPE}" in
-  *debug)
-    readonly APP_OPTIM="debug"
-    CFLAGS="-O0 -g"
-    opts+=("--enable-asserts")
-    ;;
-  static* | shared*)
-    readonly APP_OPTIM="release"
-    CFLAGS="-O2 -g"
-    ;;
-  *)
-    usage
-    exit 1
-    ;;
-esac
-
-case "${BUILD_TYPE}" in
-  shared*) readonly SHARED="1" ;;
-  *)
-    readonly SHARED="0"
-    CFLAGS="${CFLAGS} -fPIE"
-    LDFLAGS="${LDFLAGS} -Wl,-pie"
-    opts+=("--disable-shared")
-    ;;
-esac
-
-# Create a fresh build directory
-make_build_dir "${BUILD_DIR}"
-cd "${BUILD_DIR}"
-ln -s "${LIBWEBP_ROOT}" jni
-
-"${ANDROID_NDK_DIR}/ndk-build" -j2 \
-  APP_ABI="${APP_ABI}" \
-  APP_OPTIM="${APP_OPTIM}" \
-  ENABLE_SHARED="${SHARED}"
-
-cd "${LIBWEBP_ROOT}"
-./autogen.sh
-
-case "${APP_ABI}" in
-  armeabi*) arch="arm" ;;
-  arm64*) arch="arm64" ;;
-  *) arch="${APP_ABI}" ;;
-esac
-# TODO(b/185520507): remove this and use the binaries from
-# toolchains/llvm/prebuilt/ directly.
-rm -rf "${STANDALONE_ANDROID_DIR}"
-"${ANDROID_NDK_DIR}/build/tools/make_standalone_toolchain.py" \
-  --api 24 --arch "${arch}" --stl gnustl --install-dir \
-  "${STANDALONE_ANDROID_DIR}"
-export PATH="${STANDALONE_ANDROID_DIR}/bin:${PATH}"
-
-rm -rf "${BUILD_DIR}"
-make_build_dir "${BUILD_DIR}"
-cd "${BUILD_DIR}"
-
-case "${arch}" in
-  arm)
-    host="arm-linux-androideabi"
-    case "${APP_ABI}" in
-      armeabi) ;;
-      armeabi-v7a)
-        CFLAGS="${CFLAGS} -march=armv7-a -mfpu=neon -mfloat-abi=softfp"
-        ;;
-      *) ;;  # No configuration needed
-    esac
-    ;;
-  arm64)
-    host="aarch64-linux-android"
-    ;;
-  x86)
-    host="i686-linux-android"
-    ;;
-  x86_64)
-    host="x86_64-linux-android"
-    ;;
-  *) ;;  # Skip configuration
-esac
-
-setup_ccache
-CC="clang"
-
-"${LIBWEBP_ROOT}/configure" --host "${host}" --build \
-  "$("${LIBWEBP_ROOT}/config.guess")" CC="${CC}" CFLAGS="${CFLAGS}" \
-  LDFLAGS="${LDFLAGS}" "${opts[@]}"
-make -j
-
-if [[ "${GERRIT_REFSPEC:-}" = "refs/heads/portable-intrinsics" ]] \
-  || [[ "${GERRIT_BRANCH:-}" = "portable-intrinsics" ]]; then
-  cd "${WORKSPACE}"
-  rm -rf build && mkdir build
-  cd build
-  standalone="${WORKSPACE}/android"
-  cmake ../libwebp \
-    -DWEBP_BUILD_DWEBP=1 \
-    -DCMAKE_C_COMPILER="${standalone}/bin/clang" \
-    -DCMAKE_PREFIX_PATH="${standalone}/sysroot/usr/lib" \
-    -DCMAKE_C_FLAGS=-fPIE \
-    -DCMAKE_EXE_LINKER_FLAGS=-Wl,-pie \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DWEBP_ENABLE_WASM=1
-  make -j2
-
-  cd "${WORKSPACE}"
-  make_build_dir "${BUILD_DIR}"
-  cd "${BUILD_DIR}"
-  case "${APP_ABI}" in
-    armeabi-v7a | arm64*)
-      cmake "${LIBWEBP_ROOT}" \
-        -DWEBP_BUILD_DWEBP=1 \
-        -DCMAKE_C_COMPILER="${standalone}/bin/clang" \
-        -DCMAKE_PREFIX_PATH="${standalone}/sysroot/usr/lib" \
-        -DCMAKE_C_FLAGS='-fPIE -DENABLE_NEON_BUILTIN_MULHI_INT16X8' \
-        -DCMAKE_EXE_LINKER_FLAGS=-Wl,-pie \
-        -DCMAKE_BUILD_TYPE=Release \
-        -DWEBP_ENABLE_WASM=1
-      make -j2
-      ;;
-    x86*)
-      cmake "${LIBWEBP_ROOT}" \
-        -DWEBP_BUILD_DWEBP=1 \
-        -DCMAKE_C_COMPILER="${standalone}/bin/clang" \
-        -DCMAKE_PREFIX_PATH="${standalone}/sysroot/usr/lib" \
-        -DCMAKE_C_FLAGS='-fPIE -DENABLE_X86_BUILTIN_MULHI_INT16X8' \
-        -DCMAKE_EXE_LINKER_FLAGS=-Wl,-pie \
-        -DCMAKE_BUILD_TYPE=Release \
-        -DWEBP_ENABLE_WASM=1
-      make -j2
-      ;;
-    *)
-      log_err "APP_ABI not supported."
-      exit 1
-      ;;
-  esac
-fi

external/libwebp/libwebp/infra/compile_js.sh

@@ -1,75 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2021, Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#   * Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#
-#   * Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.
-#
-#   * Neither the name of Google nor the names of its contributors may
-#     be used to endorse or promote products derived from this software
-#     without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set -ex
-
-readonly WORKSPACE="${WORKSPACE:-"$(mktemp -d -t webp.js.XXX)"}"
-readonly BUILD_DIR="${WORKSPACE}/webp_js/"
-readonly LIBWEBP_ROOT="$(realpath "$(dirname "$0")/..")"
-
-# shellcheck source=infra/common.sh
-source "${LIBWEBP_ROOT}/infra/common.sh"
-
-usage() {
-  cat << EOF
-Usage: $(basename "$0")
-Environment variables:
-WORKSPACE directory where the build is done
-EMSDK_DIR directory where emsdk is installed
-EOF
-}
-
-[[ -d "${EMSDK_DIR:?Not defined}" ]] \
-  || (log_err "${EMSDK_DIR} is not a valid directory." && exit 1)
-
-# shellcheck source=/opt/emsdk/emsdk_env.sh
-source "${EMSDK_DIR}/emsdk_env.sh"
-
-readonly EMSCRIPTEN=${EMSCRIPTEN:-"${EMSDK}/upstream/emscripten"}
-readonly \
-  EMSCRIPTEN_CMAKE_FILE="${EMSCRIPTEN}/cmake/Modules/Platform/Emscripten.cmake"
-make_build_dir "${BUILD_DIR}"
-
-pushd "${BUILD_DIR}"
-opts=("-GUnix Makefiles" "-DWEBP_BUILD_WEBP_JS=ON")
-if [[ -z "$(command -v emcmake)" ]]; then
-  opts+=("-DCMAKE_TOOLCHAIN_FILE=${EMSCRIPTEN_CMAKE_FILE}")
-  cmake \
-    "${opts[@]}" \
-    "${LIBWEBP_ROOT}"
-  make -j
-else
-  emcmake cmake \
-    "${opts[@]}" \
-    "${LIBWEBP_ROOT}"
-  emmake make -j
-fi
-popd

external/libwebp/libwebp/infra/run_static_analysis.sh

@@ -1,98 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2021, Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#   * Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#
-#   * Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.
-#
-#   * Neither the name of Google nor the names of its contributors may
-#     be used to endorse or promote products derived from this software
-#     without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set -xe
-
-LIBWEBP_ROOT="$(realpath "$(dirname "$0")/..")"
-readonly LIBWEBP_ROOT
-readonly WORKSPACE=${WORKSPACE:-"$(mktemp -d -t webp.scanbuild.XXX)"}
-
-# shellcheck source=infra/common.sh
-source "${LIBWEBP_ROOT}/infra/common.sh"
-
-usage() {
-  cat << EOF
-Usage: $(basename "$0") MODE
-Options:
-MODE supported scan modes: (shallow|deep)
-Environment variables:
-WORKSPACE directory where the build is done.
-EOF
-}
-
-#######################################
-# Wrap clang-tools scan-build.
-# Globals:
-#   OUTPUT_DIR target directory where scan-build report is generated.
-#   MODE scan-build mode
-# Arguments:
-#   $* scan-build additional args.
-# Returns:
-#   scan-build retcode
-#######################################
-scan_build() {
-  scan-build -o "${OUTPUT_DIR}" --use-analyzer="$(command -v clang)" \
-    -analyzer-config mode="${MODE}" "$*"
-}
-
-MODE=${1:?"MODE is not specified.$(
-  echo
-  usage
-)"}
-
-readonly OUTPUT_DIR="${WORKSPACE}/output-${MODE}"
-readonly BUILD_DIR="${WORKSPACE}/build"
-
-make_build_dir "${OUTPUT_DIR}"
-make_build_dir "${BUILD_DIR}"
-
-cd "${LIBWEBP_ROOT}"
-./autogen.sh
-
-cd "${BUILD_DIR}"
-grep -m 1 -q 'enable-asserts' "${LIBWEBP_ROOT}/configure.ac" \
-    && args='--enable-asserts'
-scan_build "${LIBWEBP_ROOT}/configure" --enable-everything "${args}"
-scan_build make -j4
-
-index="$(find "${OUTPUT_DIR}" -name index.html)"
-if [[ -f "${index}" ]]; then
-  mv "$(dirname "${index}")/"* "${OUTPUT_DIR}"
-else
-  # make a empty report to wipe out any old bug reports.
-  cat << EOT > "${OUTPUT_DIR}/index.html"
-<html>
-<body>
-No bugs reported.
-</body>
-</html>
-EOT
-fi

external/libwebp/libwebp/iosbuild.sh

@@ -1,168 +0,0 @@
-#!/bin/bash
-#
-# This script generates 'WebP.framework' and 'WebPDecoder.framework',
-# 'WebPDemux.framework' and 'WebPMux.framework'.
-# An iOS app can decode WebP images by including 'WebPDecoder.framework' and
-# both encode and decode WebP images by including 'WebP.framework'.
-#
-# Run ./iosbuild.sh to generate the frameworks under the current directory
-# (the previous build will be erased if it exists).
-#
-# This script is inspired by the build script written by Carson McDonald.
-# (https://www.ioncannon.net/programming/1483/using-webp-to-reduce-native-ios-app-size/).
-
-set -e
-
-# Set this variable based on the desired minimum deployment target.
-readonly IOS_MIN_VERSION=6.0
-
-# Extract the latest SDK version from the final field of the form: iphoneosX.Y
-readonly SDK=$(xcodebuild -showsdks \
-  | grep iphoneos | sort | tail -n 1 | awk '{print substr($NF, 9)}'
-)
-# Extract Xcode version.
-readonly XCODE=$(xcodebuild -version | grep Xcode | cut -d " " -f2)
-if [[ -z "${XCODE}" ]]; then
-  echo "Xcode not available"
-  exit 1
-fi
-
-readonly OLDPATH=${PATH}
-
-# Add iPhoneOS-V6 to the list of platforms below if you need armv6 support.
-# Note that iPhoneOS-V6 support is not available with the iOS6 SDK.
-PLATFORMS="iPhoneSimulator iPhoneSimulator64"
-PLATFORMS+=" iPhoneOS-V7 iPhoneOS-V7s iPhoneOS-V7-arm64"
-readonly PLATFORMS
-readonly SRCDIR=$(dirname $0)
-readonly TOPDIR=$(pwd)
-readonly BUILDDIR="${TOPDIR}/iosbuild"
-readonly TARGETDIR="${TOPDIR}/WebP.framework"
-readonly DECTARGETDIR="${TOPDIR}/WebPDecoder.framework"
-readonly MUXTARGETDIR="${TOPDIR}/WebPMux.framework"
-readonly DEMUXTARGETDIR="${TOPDIR}/WebPDemux.framework"
-readonly DEVELOPER=$(xcode-select --print-path)
-readonly PLATFORMSROOT="${DEVELOPER}/Platforms"
-readonly LIPO=$(xcrun -sdk iphoneos${SDK} -find lipo)
-LIBLIST=''
-DECLIBLIST=''
-MUXLIBLIST=''
-DEMUXLIBLIST=''
-
-if [[ -z "${SDK}" ]]; then
-  echo "iOS SDK not available"
-  exit 1
-elif [[ ${SDK%%.*} -gt 8 ]]; then
-  EXTRA_CFLAGS="-fembed-bitcode"
-elif [[ ${SDK%%.*} -le 6 ]]; then
-  echo "You need iOS SDK version 6.0 or above"
-  exit 1
-fi
-
-echo "Xcode Version: ${XCODE}"
-echo "iOS SDK Version: ${SDK}"
-
-if [[ -e "${BUILDDIR}" || -e "${TARGETDIR}" || -e "${DECTARGETDIR}" \
-      || -e "${MUXTARGETDIR}" || -e "${DEMUXTARGETDIR}" ]]; then
-  cat << EOF
-WARNING: The following directories will be deleted:
-WARNING:   ${BUILDDIR}
-WARNING:   ${TARGETDIR}
-WARNING:   ${DECTARGETDIR}
-WARNING:   ${MUXTARGETDIR}
-WARNING:   ${DEMUXTARGETDIR}
-WARNING: The build will continue in 5 seconds...
-EOF
-  sleep 5
-fi
-rm -rf ${BUILDDIR} ${TARGETDIR} ${DECTARGETDIR} \
-    ${MUXTARGETDIR} ${DEMUXTARGETDIR}
-mkdir -p ${BUILDDIR} ${TARGETDIR}/Headers/ ${DECTARGETDIR}/Headers/ \
-    ${MUXTARGETDIR}/Headers/ ${DEMUXTARGETDIR}/Headers/
-
-if [[ ! -e ${SRCDIR}/configure ]]; then
-  if ! (cd ${SRCDIR} && sh autogen.sh); then
-    cat << EOF
-Error creating configure script!
-This script requires the autoconf/automake and libtool to build. MacPorts can
-be used to obtain these:
-https://www.macports.org/install.php
-EOF
-    exit 1
-  fi
-fi
-
-for PLATFORM in ${PLATFORMS}; do
-  ARCH2=""
-  if [[ "${PLATFORM}" == "iPhoneOS-V7-arm64" ]]; then
-    PLATFORM="iPhoneOS"
-    ARCH="aarch64"
-    ARCH2="arm64"
-  elif [[ "${PLATFORM}" == "iPhoneOS-V7s" ]]; then
-    PLATFORM="iPhoneOS"
-    ARCH="armv7s"
-  elif [[ "${PLATFORM}" == "iPhoneOS-V7" ]]; then
-    PLATFORM="iPhoneOS"
-    ARCH="armv7"
-  elif [[ "${PLATFORM}" == "iPhoneOS-V6" ]]; then
-    PLATFORM="iPhoneOS"
-    ARCH="armv6"
-  elif [[ "${PLATFORM}" == "iPhoneSimulator64" ]]; then
-    PLATFORM="iPhoneSimulator"
-    ARCH="x86_64"
-  else
-    ARCH="i386"
-  fi
-
-  ROOTDIR="${BUILDDIR}/${PLATFORM}-${SDK}-${ARCH}"
-  mkdir -p "${ROOTDIR}"
-
-  DEVROOT="${DEVELOPER}/Toolchains/XcodeDefault.xctoolchain"
-  SDKROOT="${PLATFORMSROOT}/"
-  SDKROOT+="${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK}.sdk/"
-  CFLAGS="-arch ${ARCH2:-${ARCH}} -pipe -isysroot ${SDKROOT} -O3 -DNDEBUG"
-  CFLAGS+=" -miphoneos-version-min=${IOS_MIN_VERSION} ${EXTRA_CFLAGS}"
-
-  set -x
-  export PATH="${DEVROOT}/usr/bin:${OLDPATH}"
-  ${SRCDIR}/configure --host=${ARCH}-apple-darwin --prefix=${ROOTDIR} \
-    --build=$(${SRCDIR}/config.guess) \
-    --disable-shared --enable-static \
-    --enable-libwebpdecoder --enable-swap-16bit-csp \
-    --enable-libwebpmux \
-    CFLAGS="${CFLAGS}"
-  set +x
-
-  # Build only the libraries, skip the examples.
-  make V=0 -C sharpyuv
-  make V=0 -C src install
-
-  LIBLIST+=" ${ROOTDIR}/lib/libwebp.a"
-  DECLIBLIST+=" ${ROOTDIR}/lib/libwebpdecoder.a"
-  MUXLIBLIST+=" ${ROOTDIR}/lib/libwebpmux.a"
-  DEMUXLIBLIST+=" ${ROOTDIR}/lib/libwebpdemux.a"
-
-  make clean
-
-  export PATH=${OLDPATH}
-done
-
-echo "LIBLIST = ${LIBLIST}"
-cp -a ${SRCDIR}/src/webp/{decode,encode,types}.h ${TARGETDIR}/Headers/
-${LIPO} -create ${LIBLIST} -output ${TARGETDIR}/WebP
-
-echo "DECLIBLIST = ${DECLIBLIST}"
-cp -a ${SRCDIR}/src/webp/{decode,types}.h ${DECTARGETDIR}/Headers/
-${LIPO} -create ${DECLIBLIST} -output ${DECTARGETDIR}/WebPDecoder
-
-echo "MUXLIBLIST = ${MUXLIBLIST}"
-cp -a ${SRCDIR}/src/webp/{types,mux,mux_types}.h \
-    ${MUXTARGETDIR}/Headers/
-${LIPO} -create ${MUXLIBLIST} -output ${MUXTARGETDIR}/WebPMux
-
-echo "DEMUXLIBLIST = ${DEMUXLIBLIST}"
-cp -a ${SRCDIR}/src/webp/{decode,types,mux_types,demux}.h \
-    ${DEMUXTARGETDIR}/Headers/
-${LIPO} -create ${DEMUXLIBLIST} -output ${DEMUXTARGETDIR}/WebPDemux
-
-echo  "SUCCESS"