Zqoi

QOI decoder/encoder written in pure Zig. Optimized for decoding speed.

Using

You will need:

• Zig compiler 0.16.0

Fetch:

zig fetch --save git+https://github.com/Pivok7/zqoi

In build.zig:

constzqoi=b.dependency("zqoi",.{.target=target,.optimize=optimize,}).module("root");exe.root_module.addImport("zqoi",zqoi);

Example:

conststd=@import("std");constzqoi=@import("zqoi");pubfnmain(init:std.process.Init)!void{constallocator=init.gpa;constio=init.io;// Load and save file{varimg=tryzqoi.Image.fromFilePath(allocator,io,"../image.qoi");deferimg.deinit(allocator);tryimg.toFilePath(io,"copy.qoi");}// Manually create image{varimg=zqoi.Image{.width=1024,.height=1024,.pixels=undefined,.format=.r8g8b8a8_srgb,};img.pixels=tryallocator.alloc(zqoi.Rgba,img.width*img.height);deferallocator.free(img.pixels);for(img.pixels,0..)|*pixel,i|{pixel.*=zqoi.Rgba{.r=@as(u8,@intCast(i%256)),.g=@as(u8,@intCast(i%128)),.b=@as(u8,@intCast(i%64)),.a=255,};}tryimg.toFilePath(io,"generated.qoi");}}

Speed

You can run benchmarks yourself by following the instructions in the 'benchmark' directory.

Benchmarks performed on the images from https://qoiformat.org/benchmark/

CPU: AMD Ryzen 7 5700X

The results: