179 lines
12 KiB
Markdown
179 lines
12 KiB
Markdown
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# QOI - The “Quite OK Image Format” for fast, lossless image compression
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Single-file MIT licensed library for C/C++
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See [qoi.h](https://github.com/phoboslab/qoi/blob/master/qoi.h) for
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the documentation and format specification.
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More info at https://qoiformat.org
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## Why?
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Compared to stb_image and stb_image_write QOI offers 20x-50x faster encoding,
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3x-4x faster decoding and 20% better compression. It's also stupidly simple and
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fits in about 300 lines of C.
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## Example Usage
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- [qoiconv.c](https://github.com/phoboslab/qoi/blob/master/qoiconv.c)
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converts between png <> qoi
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- [qoibench.c](https://github.com/phoboslab/qoi/blob/master/qoibench.c)
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a simple wrapper to benchmark stbi, libpng and qoi
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## MIME Type, File Extension
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The recommended MIME type for QOI images is `image/qoi`. While QOI is not yet
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officially registered with IANA, I believe QOI has found enough adoption to
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prevent any future image format from choosing the same name, thus making a
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MIME type collision highly unlikely ([see #167](https://github.com/phoboslab/qoi/issues/167)).
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The recommended file extension for QOI images is `.qoi`
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## Limitations
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The QOI file format allows for huge images with up to 18 exa-pixels. A streaming
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en-/decoder can handle these with minimal RAM requirements, assuming there is
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enough storage space.
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This particular implementation of QOI however is limited to images with a
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maximum size of 400 million pixels. It will safely refuse to en-/decode anything
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larger than that. This is not a streaming en-/decoder. It loads the whole image
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file into RAM before doing any work and is not extensively optimized for
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performance (but it's still very fast).
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If this is a limitation for your use case, please look into any of the other
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implementations listed below.
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## Improvements, New Versions and Contributing
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The QOI format has been finalized. It was a conscious decision to **not** have a
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version number in the file header. If you have a working QOI implementation today,
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you can rest assured that it will be compatible with all QOI files tomorrow.
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There are a lot of interesting ideas for a successor of QOI, but none of these will
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be implemented here. That doesn't mean you shouldn't experiment with QOI, but please
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be aware that pull requests that change the format will not be accepted.
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Likewise, pull requests for performance improvements will probably not be accepted
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either, as this "reference implementation" tries to be as easy to read as possible.
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## Tools
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- [floooh/qoiview](https://github.com/floooh/qoiview) - native QOI viewer
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- [pfusik/qoi-fu](https://github.com/pfusik/qoi-fu/releases) - QOI Plugin installer for Windows Explorer, Finder, GNOME, GIMP, Paint.NET and XnView
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- [iOrange/QoiFileTypeNet](https://github.com/iOrange/QoiFileTypeNet/releases) - QOI Plugin for Paint.NET
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- [iOrange/QOIThumbnailProvider](https://github.com/iOrange/QOIThumbnailProvider) - Add thumbnails for QOI images in Windows Explorer
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- [Tom94/tev](https://github.com/Tom94/tev) - another native QOI viewer (allows pixel peeping and comparison with other image formats)
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- [qoiconverterx](https://apps.apple.com/br/app/qoiconverterx/id1602159820) QOI <=> PNG converter available on the Mac App Store
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- [kaetemi/qoi-ma](https://github.com/kaetemi/qoi-max) - QOI Bitmap I/O Plugin for 3ds Max
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- [rtexviewer](https://raylibtech.itch.io/rtexviewer) - texture viewer, supports QOI
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- [rtexpacker](https://raylibtech.itch.io/rtexpacker) - texture packer, supports QOI
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- [DmitriySalnikov/godot_qoi](https://github.com/DmitriySalnikov/godot_qoi) - QOI GDNative Addon for Godot Engine
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- [dan9er/farbfeld-convert-qoi](https://gitlab.com/dan9er/farbfeld-convert-qoi) - QOI <=> farbfeld converter
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- [LTMX/Unity.QOI](https://github.com/LTMX/Unity.QOI) - QOI Importer and Exporter for the Unity3D Game Engine
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- [Ben1138/unity-qoi](https://github.com/Ben1138/unity-qoi) - QOI Importer(only) support for the Unity3D Game Engine
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- [xiaozhuai/jetbrains-qo](https://github.com/xiaozhuai/jetbrains-qoi) - [QOI Support](https://plugins.jetbrains.com/plugin/19352-qoi-support) for Jetbrains' IDE.
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- [serge-ivamov/QOIql](https://github.com/serge-ivamov/QOIql) - MacOS QuickLook plugin for QOI
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- [tobozo/kde-thumbnailer-qoi](https://github.com/tobozo/kde-thumbnailer-qoi) - QOI Thumbnailer for KDE
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- [walksanatora/qoi-thumbnailer-nemo](https://github.com/walksanatora/qoi-thumbnailer-nemo) - QOI Thumbnailer for Nemo
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- [hzeller/timg](https://github.com/hzeller/timg) - a terminal image viewer with QOI support
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- [LuisAlfredo92/Super-QOI-converter](https://github.com/LuisAlfredo92/Super-QOI-converter "LuisAlfredo92/Super-QOI-converter") - A program to convert JPG, JPEG, BMP, and PNG to QOI
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- [Console version](https://github.com/LuisAlfredo92/Super-QOI-converter-Console- "Console version"): Available for Linux, OSX and Windows
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- [GUI version](https://github.com/LuisAlfredo92/Super-QOI-converter-GUI- "GUI version"): Available only for windows
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- [tacent view](https://github.com/bluescan/tacentview) - Image and texture viewer, supports QOI
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- [colemanrgb/qoi2spr](https://github.com/colemanrgb/qoi2spr) - A variety of applications for decoding and encoding of QOI images on [RISC OS](https://www.riscosopen.org/)
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## Implementations & Bindings of QOI
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- [pfusik/qoi-fu](https://github.com/pfusik/qoi-fu) - Fusion, transpiling to C, C++, C#, D, Java, JavaScript, Python, Swift and TypeScript
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- [kodonnell/qoi](https://github.com/kodonnell/qoi) - Python
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- [JaffaKetchup/dqoi](https://github.com/JaffaKetchup/dqoi) - Dart, with Flutter support
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- [Cr4xy/lua-qoi](https://github.com/Cr4xy/lua-qoi) - Lua
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- [superzazu/SDL_QOI](https://github.com/superzazu/SDL_QOI) - C, SDL2 bindings
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- [saharNooby/qoi-java](https://github.com/saharNooby/qoi-java) - Java
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- [MasterQ32/zig-qoi](https://github.com/MasterQ32/zig-qoi) - Zig
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- [rbino/qoix](https://github.com/rbino/qoix) - Elixir
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- [NUlliiON/QoiSharp](https://github.com/NUlliiON/QoiSharp) - C#
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- [aldanor/qoi-rust](https://github.com/aldanor/qoi-rust) - Rust
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- [zakarumych/rapid-qoi](https://github.com/zakarumych/rapid-qoi) - Rust
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- [takeyourhatoff/qoi](https://github.com/takeyourhatoff/qoi) - Go
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- [DosWorld/pasqoi](https://github.com/DosWorld/pasqoi) - Pascal
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- [elihwyma/Swift-QOI](https://github.com/elihwyma/Swift-QOI) - Swift
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- [xfmoulet/qoi](https://github.com/xfmoulet/qoi) - Go
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- [erratique.ch/qoic](https://erratique.ch/software/qoic) - OCaml
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- [arian/go-qoi](https://github.com/arian/go-qoi) - Go
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- [kchapelier/qoijs](https://github.com/kchapelier/qoijs) - JavaScript
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- [KristofferC/QOI.jl](https://github.com/KristofferC/QOI.jl) - Julia
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- [shadowMitia/libqoi](https://github.com/shadowMitia/libqoi) - C++
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- [MKCG/php-qoi](https://github.com/MKCG/php-qoi) - PHP
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- [LightHouseSoftware/qoiformats](https://github.com/LightHouseSoftware/qoiformats) - D
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- [mhoward540/qoi-nim](https://github.com/mhoward540/qoi-nim) - Nim
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- [wx257osn2/qoixx](https://github.com/wx257osn2/qoixx) - C++
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- [Tiefseetauchner/lr-paint](https://github.com/Tiefseetauchner/lr-paint) - Processing
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- [amstan/qoi-fpga](https://github.com/amstan/qoi-fpga) - FPGA: verilog
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- [musabkilic/qoi-decoder](https://github.com/musabkilic/qoi-decoder) - Python
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- [mathpn/py-qoi](https://github.com/mathpn/py-qoi) - Python
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- [JohannesFriedrich/qoi4R](https://github.com/JohannesFriedrich/qoi4R) - R
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- [shraiwi/mini-qoi](https://github.com/shraiwi/mini-qoi) - C, streaming decoder
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- [10maurycy10/libqoi/](https://github.com/10maurycy10/libqoi/) - Rust
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- [0xd34df00d/hsqoi](https://github.com/0xd34df00d/hsqoi) - Haskell
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- [418Coffee/qoi-v](https://github.com/418Coffee/qoi-v) - V
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- [Imagine-Programming/QoiImagePlugin](https://github.com/Imagine-Programming/QoiImagePlugin) - PureBasic
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- [Fabien-Chouteau/qoi-spark](https://github.com/Fabien-Chouteau/qoi-spark) - Ada/SPARK formally proven
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- [mzgreen/qoi-kotlin](https://github.com/mzgreen/qoi-kotlin) - Kotlin Multiplatform
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- [Aftersol/Simplified-QOI-Codec](https://github.com/Aftersol/Simplified-QOI-Codec) - C99, encoder and decoder, freestanding
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- [AuburnSounds/gamut](https://github.com/AuburnSounds/gamut) - D
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- [AngusJohnson/TQoiImage](https://github.com/AngusJohnson/TQoiImage) - Delphi
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- [MarkJeronimus/qoi-java-spi](https://github.com/MarkJeronimus/qoi-java-spi) - Java SPI
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- [aumouvantsillage/qoi-racket](https://github.com/aumouvantsillage/qoi-racket) - Racket
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- [rubikscraft/qoi-stream](https://github.com/rubikscraft/qoi-stream) - C99, one byte at a time streaming encoder and decoder
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- [rubikscraft/qoi-img](https://github.com/rubikscraft/qoi-img) - NodeJS typescript, bindings to both [QOIxx](https://github.com/wx257osn2/qoixx) and [qoi-stream](https://github.com/rubikscraft/qoi-stream)
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- [grego/hare-qoi](https://git.sr.ht/~grego/hare-qoi) - Hare
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- [MrNocole/ZTQOI](https://github.com/MrNocole/ZTQOI) - Objective-C
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- [bpanthi977/qoi](https://github.com/bpanthi977/qoi) - Common Lisp
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- [Floessie/pam2qoi](https://github.com/Floessie/pam2qoi) - C++
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- [SpeckyYT/spwn-qoi](https://github.com/SpeckyYT/spwn-qoi) - SPWN
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- [n00bmind/qoi](https://github.com/n00bmind/qoi) - Jai
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- [SixLabors/ImageSharp](https://github.com/SixLabors/ImageSharp) - C# image proccesing library
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- [zertovitch/gid](https://github.com/zertovitch/gid) - Ada
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- [nazrin/lil](https://codeberg.org/nazrin/lil) - Lua image library
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## QOI Support in Other Software
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- [Amiga OS QOI datatype](https://github.com/dgaw/qoi-datatype) - adds support for decoding QOI images to the Amiga operating system.
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- [SerenityOS](https://github.com/SerenityOS/serenity) - supports decoding QOI system wide through a custom [cpp implementation in LibGfx](https://github.com/SerenityOS/serenity/blob/master/Userland/Libraries/LibGfx/QOILoader.h)
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- [Raylib](https://github.com/raysan5/raylib) - supports decoding and encoding QOI textures through its [rtextures module](https://github.com/raysan5/raylib/blob/master/src/rtextures.c)
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- [Rebol3](https://github.com/Oldes/Rebol3/issues/39) - supports decoding and encoding QOI using a native codec
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- [c-ray](https://github.com/vkoskiv/c-ray) - supports QOI natively
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- [SAIL](https://sail.software) - image decoding library, supports decoding and encoding QOI images
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- [Orx](https://github.com/orx/orx) - 2D game engine, supports QOI natively
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- [IrfanView](https://www.irfanview.com) - supports decoding and encoding QOI through its Formats plugin
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- [ImageMagick](https://github.com/ImageMagick/ImageMagick) - supports decoding and encoding QOI, since 7.1.0-20
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- [barebox](https://barebox.org) - bootloader, supports decoding QOI images for splash logo, since v2022.03.0
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- [KorGE](https://korge.org) - & KorIM Kotlin 2D game engine and imaging library, supports decoding and encoding QOI natively since 2.7.0
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- [DOjS](https://github.com/SuperIlu/DOjS) - DOS JavaScript Canvas implementation supports loading QOI files
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- [XnView MP](https://www.xnview.com/en/xnviewmp/) - supports decoding QOI since 1.00
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- [ffmpeg](https://ffmpeg.org/) - supports decoding and encoding QOI since 5.1
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- [JPEGView](https://github.com/sylikc/jpegview) - lightweight Windows image viewer, supports decoding and encoding of QOI natively, since 1.1.44
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- [darktable](https://github.com/darktable-org/darktable) - photography workflow application and raw developer, supports decoding since 4.4.0
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- [KDE](https://kde.org) - supports decoding and encoding QOI images. Implemented in [KImageFormats](https://invent.kde.org/frameworks/kimageformats)
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- [EFL](https://www.enlightenment.org) - supports decoding and encoding QOI images since 1.27.
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- [Swingland](https://git.sr.ht/~phlash/swingland) - supports QOI decoding/loading via the `ImageIO` API of this Java Swing reimplemenation for Wayland
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- [Imagine](https://www.nyam.pe.kr/dev/imagine/) - supports decoding and encoding QOI images since 1.3.9
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## Packages
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- [AUR](https://aur.archlinux.org/pkgbase/qoi-git/) - system-wide qoi.h, qoiconv and qoibench install as split packages.
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- [Debian](https://packages.debian.org/bookworm/source/qoi) - packages for binaries and qoi.h
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- [Ubuntu](https://launchpad.net/ubuntu/+source/qoi) - packages for binaries and qoi.h
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Packages for other systems [tracked at Repology](https://repology.org/project/qoi/versions).
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