Recursive_VF_1.070.ttf (variable) missing glyphs about ttf-parser HOT 5 CLOSED

Just to clarify even more, by disabling variable fonts support variable OpenType fonts (CFF2) will stop working (can be fixed in the future). Regular OpenType fonts (CFF) will continue working.
TrueType fonts (glyf) will work anyway and will be outlined using the default variation style (i.e. without applying the variation deltas).

Disabling variable fonts makes ttf-parser 2x smaller binary-wise and slightly faster in some operations.

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I will publish a new release now, but note that a new version has variable fonts support as an optional feature. Afaik, you're using --no-default-features.

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Yes, this is definitely a bug.

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Because ttf-parser is zero-allocation, we have to limit variation tuples to 16 while the technical limit is 4095. And this font uses 15-23. This is the reason.

I will increase the limit to 32. This should be good enough.

PS: on older Rust versions I had a drastic performance regression when using larger tuples stack, but looks like it was fixed, because on 1.49 I don't see any performance differences.

Wrong benchmark... it did made gvar parsing 10% slower.

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Thanks for looking into this & the heads up about the features 👍 I'll take a look at the feature activation up the stack.

from ttf-parser.