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Follow HarfBuzz for the font metrics, and fix vhea and empty glyphs - #419
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- Fix the vhea table structure - Give empty glyphs zero coordinates instead of infinite ones - Read the maxp, post and vhea versions as 16.16 version numbers - Respect the useTypoMetrics flag for the font's ascent, descent and line gap, and add lineHeight - Fix an undefined control box in the glyph metrics
- Use the typo metrics only when the font sets useTypoMetrics and the hhea metrics otherwise, with a positive ascent and a negative descent, as HarfBuzz does, instead of FreeType's fallbacks - Drop lineHeight, which HarfBuzz doesn't have and clients can derive - Expect HarfBuzz's vertical advance for Open Sans's space, which has no vmtx and doesn't set useTypoMetrics - Add tests for the typo metrics, the vertical advance without vmtx, the vhea and maxp versions, and empty CFF glyph boxes, with HarfBuzz's values
This was referenced Oct 26, 2026
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vheaandglyffixes #305 and RespectuseTypoMetrics#306 by @StLyn4, rebased onto master in one commit with them as author; their glyf fix is left out, as master has its own