Feature Request: Chrome/Android CBDT format font about twemoji-color-font HOT 17 CLOSED

I managed to build a CBDT font from the svg's.
It's a bit of a hack.. and I don't know if the font is exactly the way it is supposed to be but it works well for me in Gnome Shell.

I did it by downloading the source for the "Noto Color Emoji": https://github.com/googlei18n/noto-emoji
Then renaming the twitter svg's to match the ones there.
I exported them all as png with Inkscape and copied them to png/128 in the noto-emoji folder.
I then replaced the values of NotoColorEmoji.tmpl.ttx.tmpl and renamed the file.
I removed the lines from the makefile that had to do with flags and removed all the substitutions from emoji_aliases.txt
And ran make.

TwitterColorEmojiCBDT.zip

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There's a package on Fedora that has this https://apps.fedoraproject.org/packages/twitter-twemoji-fonts
Click the latest version and there's a TTF file in the noarch RPM.

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COLRv0 is now supported basically everywhere.

https://caniuse.com/colr

COLRv1 makes more sense for emojis and will probably be supported by browsers eventually. It is almost as powerful as SVGinOT.

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OpenType 1.9 updates COLR to support gradients etc., which is frequently dubbed ”COLRv1“.

https://docs.microsoft.com/en-us/typography/opentype/otspec190alpha/ot190alpha

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The proposal has not been approved yet. I will wait. Proposed spec: googlefonts/colr-gradients-spec

Chrome Feature Status: https://www.chromestatus.com/feature/5638148514119680
Firefox Standard Position (TBD): mozilla/standards-positions#497
Apple Standard Position (Negative): https://lists.webkit.org/pipermail/webkit-dev/2021-March/031765.html
Microsoft Standard Position (Positive): https://lists.webkit.org/pipermail/webkit-dev/2021-April/031789.html

As Myles@Apple says, it seems like reinventing the wheel to me at first take. I'll consider this further 🤔

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I want to, but need to find the time. Many other projects have been in the way.

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@eosrei I hope you find time soon to work on this, so far you've done great work.

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How do you build the font files?
Is there anything I can do to help getting this issue solved?

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A much better solution is adding SVGinOT/SVG-in-OpenType support to Chrome/Chromium and Electron. Star this issue to raise the priority https://bugs.chromium.org/p/chromium/issues/detail?id=306078

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It's not an OpenType-SVG file, admittedly, but rather COLR/CPCAL, but if your only concern is having a .ttf-file that works on all browsers, you might also be able to use this solution (easier to download from here, though).

According to https://www.colorfonts.wtf/, COLR/CPCAL is already supported on Chromium & Co.:

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Eh... COLR works for flat emoji like twemoji, but not anything with depth/gradients like gradiently. It would work with multicoloure or reinebow though 🤷🏼

The problem is literally only Chromium, therefore Chrome/Edge. Even Adobe software such as Photoshop supports OpenType-SVG. A Python SVG -> stacked glyphs library could be created or even just added to scfbuild. My todo list already seems infinite, so I won't to get doing that on a timeline anyone is happy with 😆

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A much better solution is adding SVGinOT/SVG-in-OpenType support to Chrome/Chromium and Electron. Star this issue to raise the priority https://bugs.chromium.org/p/chromium/issues/detail?id=306078

As of comment 62 on the aforementioned issue, future OT-SVG support in Chromium is basically dead in the water. May want to consider biting the bullet with COLRv1.

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As Myles@Apple says, it seems like reinventing the wheel to me at first take. I'll consider this further 🤔

Chrome's response to Apple's standard position may have useful considerations in that regard.

This might be useful in this context: https://github.com/googlefonts/color-fonts/tree/main/fonts contains COLRv1 versions (twemoji-*_colr_1.ttf) of Twemoji which can be tested in Chrome Canary with the CORLv1 flag turned on.

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As of 98.0.4713.0 (when writing, latest canary), COLRv1 fonts are now enabled by default in Chrome (thanks @drott!).

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Closed in favor of #113

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As in https://pixelambacht.nl/chromacheck/ , android chrome supports CBDT.

What's more, Google folks added OT-SVG support to chrome, but left it disabled:
https://issues.chromium.org/issues/40336440#comment71

If you have the facility to build chrome for android, gives the patches a try.

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