curioustorvald/Terrarum-sans-bitmap
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WOFF builder

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OTFbuild/CLAUDE.md
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# OTFbuild
Python toolchain that builds an OpenType (CFF) font from the TGA sprite sheets used by the bitmap font engine.
Python toolchain that builds an OpenType (CFF) and Web Open Font (WOFF2) font from the TGA sprite sheets used by the bitmap font engine.
## Building
```bash
pip install fonttools
python3 OTFbuild/build_font.py src/assets -o OTFbuild/TerrarumSansBitmap.otf
# builds both OTF and WOFF2
make all
```
Options:
- `--no-bitmap` — skip EBDT/EBLC bitmap strike (faster builds for iteration)
- `--no-features` — skip GSUB/GPOS OpenType features
## Debugging with HarfBuzz
Install `uharfbuzz` for shaping tests:
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| `opentype_features.py` | Generates GSUB/GPOS feature code for feaLib |
| `keming_machine.py` | Generates kerning pairs from glyph kern masks |
| `hangul.py` | Hangul syllable composition and jamo GSUB data |
| `otf2woff2.py` | OTF to WOFF2 wrapper |
### OpenType features generated (`opentype_features.py`)