Color font info

[o-t-w]

I opened this issue on a project that uses this as a dependency. Is it possible to grab this info using lib-font?

In the CSS fonts Level 4 spec, base-palette can reference a named color-palette embedded inside the font. Can lib-font obtain that information?

override-colors can reference different layers of the font either using a numerical index, or named indexes. Can lib-font get the names of these layers?
Wakamai-Fondue/wakamai-fondue-site#147

[Pomax]

the COLR table format 0 is supported, in the sense that you can query the table and then use its data to find the CPAL entries for glyphs. Get the a glyph's BaseGlyphRecord, then find its record.numLayers associated layers starting at record.firstLayerIndex. Each layer has a glyph id that should match the one you're working with (useful for error detection) and a paletteIndex value that is used with the CPAL table

The just-accepted COLR table format 1 does not have a code backing at present, so a lot of the color-related parts of the in-draft CSS4 spec are unlikely to currently work with this library.