I have been experimenting with the kerning of glyphs using 'Cursive Anchors'. Although these seem to work as expected in the font editor when the font is exported and installed in Windows the cursive positioning works in some applications but not in most. Many applications including Microsoft Word just seem to ignore the anchors and position the glyphs as if the anchors did not exist.
Is there something I am missing ?
Are these features only reserved for Arabic scripts or something like that ?
Are they supposed to function correctly for Latin scripts but haven't been implemented for most applications ?
Comments
The real problem is still performance. Shaping is still really slow compared to "simple" text route.
Here are some discussions about shaping performance from Sergey Malkin (who directly works on Word): https://github.com/harfbuzz/harfbuzz/issues/1463#issuecomment-505592189