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