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Tests: Add test for lossless webp file using a color indexing tranform

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The image is https://quakewiki.org/wiki/File:Qpalette.png in lossless
webp format with a color indexing transform.

I've created Qpalette.webp by running

    examples/cwebp -z 0 ~/src/serenity/tmp.ppm -o Qpalette.webp

built at libwebp webmproject/libwebp@0825faa4c1 (without
png support, so I first ran

    Build/lagom/image ~/Downloads/Qpalette.png -o tmp.ppm

to convert it from png to a format my cwebp binary could read).

This file also happens to explicitly set max_symbol, so it serves
as a test for that code path as well.
This commit is contained in:
Nico Weber 2023-04-07 15:21:57 -04:00 • committed by Linus Groh
parent 24967b0d29
commit 6151a251f5
2 changed files with 20 additions and 0 deletions
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