Add color emoji rendering for TTF fonts#582
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Support all three OpenType color emoji formats: - COLR/CPAL layered vector glyphs (Twemoji, OpenMoji, Segoe UI Emoji) - CBDT/CBLC embedded PNG bitmaps (Noto Color Emoji) - sbix embedded PNG bitmaps (Apple Color Emoji) fillText draws color glyphs automatically, including through typeface fallbacks. Bitmap strikes are selected by font size and decoded PNGs are cached on the Typeface. New Typeface.hasColorGlyph proc. Also: - Bitmap-only fonts (no glyf/CFF, like Noto Color Emoji) now load. - Platform 0 (Unicode) cmap subtables are now parsed; Apple Color Emoji has no Windows cmap at all. - typeset skips zero-width format runes (ZWJ, variation selectors) so emoji sequences degrade into their individual emoji instead of tofu. - strokeText skips color glyphs instead of crashing on outline-less fonts. Tests use three tiny generated fonts (one per format, see generate_emoji_fonts.py) plus an 11 KB subset of the real Twemoji Mozilla COLRv0 font. Verified against full Apple Color Emoji, Noto Color Emoji and Twemoji Mozilla. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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I wanted to see how complicated it would be to get TTF emojis rendering with Pixie.
And when I say "I", I mean Claude Fable.
Turns out it was just $27 of tokens (part of my subscription, so nothing really).
This PS seems to works and looks all right to me... and I wouldn't mind it merged... however considering how little the effort I put into it I won't be sad/surprised to see it closed.
Happy to do more human effort if it helps get this merged.