Your font seems to work in Harfbuzz, although I can't completely tell because I'm not sure what output you expect. In the "boxes should disappear" example, I see SW A S20310 SW M turns into .null S20310 .null, which I guess is the boxes disappearing? What is the contextual positioning rule that isn't working for you - what input are you giving and what output do you expect? (Incidentally I've never seen a font with spaces in the glyph names before; that shouldn't be a problem, but it's certainly unusual.)
Can I recommend using the Crowbar debugger for troubleshooting OpenType layout problems?
Comments
In Your VOLT project, there is only 1 character in each group.
Is it right?
Regards
Sami
Can I recommend using the Crowbar debugger for troubleshooting OpenType layout problems?