UCDB can store glyph outlines for multiple fonts per codepoint.

In the future distinction between styles will be added so it will be possible to query for the preferred font to typeset, say, character U+570b 國 in bold, serif or sans-serif style.

outlines are stored as SVG pathdata literals (i.e. the value of the d attribute in <path d='...'/> SVG elements)

Fonts (in TTF, OTF formats) may be generated with SvgTtf from the accumulated data such that they cover either:

(a) codepoint intervals of 32K (32768) positions (such that each Unicode plane of 64K positions is covered by two fonts, one for the codepoint interval 0x__000..0x__7ff and one for the interval 0x__800..0xfff). These are dubbed Half Plane Fonts (HPFs).

(b) Unicode blocks as specified and/or arbitrary codepoint collections.

Choice (b) is left for the future, for the moment we only support monospaced HPFs to accommodate for the most important use case, namely providing fonts for CJK ideographs.

outlines_of_sourcefonts outlines_of_combifonts