Make the font atlas use a color image#7298
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emilk merged 1 commit intoemilk:mainfrom Jul 4, 2025
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Splitting this out from the Parley work as requested. This removes
FontImageand makes the font atlas use aColorImage. It converts alpha to coverage at glyph-drawing time, not at delta-upload time.This doesn't do much now, but will allow for color emoji rendering once we start using Parley.
I've changed things around so that we pass in
text_alpha_to_coverageto theFontsthe same way we do withpixels_per_pointandmax_texture_side, reusing the existing code to check if the setting differs and recreating the font atlas if so. I'm not quite sure why this wasn't done in the first place.I've left
ImageDataas an enum for now, in case we want to add support for more texture pixel formats in the future (which I personally think would be worthwhile). If you'd like, I can just remove that enum entirely.