Trouble drawing emojis about vello HOT 8 OPEN

We decided in the 2024-04-04 office hours to re-open this issue, and use it track getting COLRv1 emoji (etc.) working in Vello

See also #gpu > Emoji Rendering

from vello.

Okay, I think it has something to do with the color. When I use "NotoColorEmoji-Regular.ttf", which is a font that only has the black outline of each emoji, it renders correctly (the ax emoji and numbers show up). This makes me think that Vello is fine, I just need to figure out how to use the color that the fonts are giving me.

I expect that if I dive into the text shaping crates I will figure this out.

from vello.

@jasoneveleth There is a little bit more to color emoji support. Supporting the two current main ways that fonts represent color emoji (‘COLRv1’ and embedded PNGs) is something that we intend to do.
Noto Color Emoji has fallback glyphs for the emoji that can be rendered like conventional fonts for the moment.

from vello.

Thank you. That's exactly what I needed to know.

from vello.

And specifically COLRv1 (the version of color emoji used in current versions of Noto Color Emoji) is likely to be first.

from vello.

I'd like to get Apple's emojis to render on mac. Do they use COLRv1? I would guess from the existence of this python library that they're using pngs.

If they're using pngs, is the best strategy to render them as an Image and then draw_image onto the scene?

from vello.