text/v2: use embedded bitmap data when possible

[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?

Some TrueType/OpenType fonts include bitmap data for small glyphs. These provide better user experience for low-resolution environment.

This feature is requested by @kettek .

Why is this needed?

Better UX

[hajimehoshi]

We just have to treat bitmap data at

ebiten/text/v2/gotextfacesource.go

Lines 228 to 231 in 6eee7cc

	case api.GlyphBitmap:
	if data.Outline != nil {
	segs = data.Outline.Segments
	}

See also https://pkg.go.dev/github.com/go-text/typesetting/opentype/api#GlyphBitmap

[hajimehoshi]

go-text/typesetting#160