A Rust implemention of the “Quite OK Image” format for fast, lossless image compression.

See Phoboslab's original C implementation for more details.

License

Apache-2.0 OR MIT.

To do

• Add tests for decoding using 3 and 4 channels where the source has the opposite number of channels.
• Include benchmarks for the C implementation
• Make integer casts more strict to prevent overflows
• More tests
• Fuzzing

Generating test images

You'll need to build the C qoiconv utility with this hack applied:

```diff diff --git a/qoiconv.c b/qoiconv.c index 6e7ad36..c91d2e0 100644 --- a/qoiconv.c +++ b/qoiconv.c @@ -84,7 +84,12 @@ int main(int argc, char *argv) { .channels = channels, .colorspace = QOI_SRGB }); - } + } else if (STR_ENDS_WITH(argv[2], ".raw")) { + encoded = 1; + FILE fp = fopen(argv[2], "wb"); + fwrite(pixels, w * h * channels, 1, fp); + fclose(fp); + }

if (!encoded) {
    printf("Couldn't write/encode %s\n", argv[2]);

```

Copy it to cqoiconv

Download https://phoboslab.org/files/qoibench/images.tar

Run ./create_tests.sh <path to images.tar>