text/v2: add an API to get available script info from an OpenType/TrueType font

[hajimehoshi]

Operating System

• Windows
• macOS
• Linux
• FreeBSD
• OpenBSD
• Android
• iOS
• Nintendo Switch
• PlayStation 5
• Xbox
• Web Browsers

What feature would you like to be added?

It should be accessible to get script info in an OpenType/TrueType font. See GSUB and GPOS tables.

See also https://learn.microsoft.com/en-us/typography/opentype/spec/chapter2#slTbl_sRec

Why is this needed?

No response

[benoitkugler]

You could maybe use https://pkg.go.dev/github.com/go-text/typesetting@v0.2.1/font/opentype/tables#Layout
Do you have a more precise use case in mind ?

[hajimehoshi]

Do you have a more precise use case in mind ?

When we have m languages (locales) and n font files, we want to choose fonts to render texts in an appropriate order. If the locales are Japanese and English in this order, we prefer a font which has Jpan over a font which doesn't have it.