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Sorry, I see how my previous comment was misleading. To clarify: No, QOI is not doing that. QOI stores RGBA as R,G,B,A because it is big endian.

Little endian would imply that RGBA is stored as A,B,G,R. Which was my argument against using LE for a file format.

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I don't believe it would imply that, because those are independent elements. RGBA would still be stored as R, G, B, A unless you're considering each pixel as a single 32-bit integer. A C structure for the colors would even live in memory in the order you expect. Just like a string is still stored byte-by-byte even in little-endian contexts.

LE vs BE would only affect multi-byte integers and floats, not arrays or structures of single-byte elements.

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