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by shdon 842 days ago
GameMaker Studio has actually rather quickly jumped onto the QOI bandwagon, having 2 years ago replaced PNG textures with QOI (and added BZ2 compression on top) and found a 20% average reduction in size. So GameMaker Studio and all the games produced with it in the past 2 years or so do actually use QOI internally.

Not something a consumer knowingly uses, but also not quite irrelevant either.
2 comments
JyrkiAlakuijala 842 days ago
That feels a little sad. If qoi had anything good (fast single-threaded decoding speed for photographic content) adding bz2 most certainly removed it. They could have just used WebP lossless and it would have been faster and smaller.
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pornel 842 days ago
Oof that looks like a confused mess of a format.

bz2 is obsolete. It’s very slow, and not that good at compressing. zstd and lzma beat it on both compression and speed at the same time.

QOI’s only selling point is simplicity of implementation that doesn’t require a complex decompressor. Addition of bz2 completely defeats that. QOI’s poorly compressed data inside another compressor may even make overall compression worse. It could heve been a raw bitmap or a PNG with gzip replaced with zstd.

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