servo
List writing systems supported by a font
So we can check which languages/scripts can be handled by this font.
This is very useful for the font fallback resolution, when we need to find a font that can be used to write a specified text.
I've started digging into this question. It's very complicated, and not easy to get direct access. I've written up some investigations as https://github.com/linebender/skribo/pull/1 and would welcome more input from experts.
This is how Qt works. And similar implementations for other backends.
I've tried to implement this by myself first, but I think that there are too many edge cases of which I'm not aware of.
@RazrFalcon Thanks, I'm mostly using Skia as a reference because I know it meets the needs of the web, but Qt also looks like a good source and I will dig into it. ~~Do you have any information about whether it correctly deals with Han unification on Linux, Windows, and macOS?~~ ETA: this is starting to become fairly clear reading through the source.
Do you have any information about whether it correctly deals with Han unification on Linux, Windows, and macOS?
Sadly, no.