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I fixed an issue in pixman's Altivec code the other day -- cgit.freedesktop.org/pixman/co

And in the process, I read through the Altivec docs and discovered that there are vector instructions that pack and unpack between a8r8g8b8 and a1r5g5b5 formats (but nothing fo r5g6b5).

Any clues why? Was a1r5g5b5 really common on Mac OS or something? I don't think I've seen a1r5g5b5 used anywhere.

cgit.freedesktop.orgvmx: Fix is_opaque, is_zero, is_transparent functions - pixman - Pixman: The pixel-manipulation library for X and cairo. (mirrored from https://gitlab.freedesktop.org/pixman/pixman)