Twemoji/EmojiOne fonts don't show up as color fonts in latest GTK3

[depau]

• Font version: 1.3
• Screenshots: at the bottom of issue
• Operating system: Ubuntu Bionic
• Steps to reproduce: Install fonts using PPA for Artful, or manual installation

For some reason, only Noto Color Emoji font (which I had had in ~/.fonts for years since when I copied it from my old phone) shows up as "color" font in latest GTK3 with color emoji support. If I replace it with your font, even with your configuration, it only shows outlines (see screenshots).

However, Noto somehow just worked. If I have it in my ~/.fonts fontconfig picks it up. IDK why.

NotoColorEmoji.ttf for testing

Noto Color Emoji:

Twemoji Color:

[13rac1]

There are four color font formats. more details

• W3C SVG
• Apple SBIX
• Google CBDT
• Microsoft COLR

GTK3 doesn't support SVGinOT fonts. I made this with SVGinOT because it is the only full color vector format of the four. CBDT/SBIX are bitmaps and result in massive font file sizes.

It's on my long-in-the-future todo list to add CBDT and SBIX bitmap color glyphs. Definitely some day!

[depau]

I guess Android font uses CBDT format then, right?

[Crissov]

Yes.

Microsoft, in Windows 10 and Edge, has the best cross-format support currently.

[13rac1]

Duplicate of #25 Further information will occur there.