TST: Convert all non-RGB(A) images to RGBA - #32212
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iccir
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Aug 15, 2026
Sometimes, `oxipng` may optimize an image by making it use a palette, and converting that directly to RGB causes a warning from Pillow. In fact, it may be wrong, since there may be transparency in the palette. Instead of checking all image formats, convert everything non-RGB(A) to RGBA first.
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iccir
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PR summary
Sometimes,
oxipngmay optimize an image by making it use a palette, and converting that directly to RGB causes a warning from Pillow. In fact, it may be wrong, since there may be transparency in the palette.Instead of checking all image formats, convert everything non-RGB(A) to RGBA first.
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