A procedurally-drawn glyph (e.g. an icon) added to the atlas alongside the font glyphs: a code
point to register it under (use a private-use point, 0xE000+) and a Canvas2D drawer that fills it
in white, centered at (cx, cy) within radius r px. Rasterized + SDF'd exactly like a letter.
A procedurally-drawn glyph (e.g. an icon) added to the atlas alongside the font glyphs: a code point to register it under (use a private-use point, 0xE000+) and a Canvas2D drawer that fills it in white, centered at
(cx, cy)within radiusrpx. Rasterized + SDF'd exactly like a letter.