googlefonts / googlefonts/fontations

Scaler generated metrics

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Dominant language
Rust
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Description

We need to support metric retrieval in the glyph scaler for the following cases:
1. Variable fonts that are missing `HVAR` tables. This requires applying `gvar` to phantom points to compute side-bearings and advances.
2. Hinted glyphs with instructions that modify metrics. Similar story wrt to phantom points.

Both cases can occur simultaneously.

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