Recompute OS/2.usMaxContext when adding feature variations
#3894
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behdad
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Aug 8, 2025
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A font might not have had a GSUB or GPOS table before, but does after addFeatureVariations, so we need to recompute OS/2.usMaxContext.
To do:
Don't assumeOS/2exists?https://learn.microsoft.com/en-us/typography/opentype/spec/otff#required-tables says it's required, so I'll assume it.Don't assume it, fT needs to be able to deal with weird fonts.