mirror of
https://github.com/storytold/craft-libs.git
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aiongg
a414736c67
The interface faces in craft-fonts are full Regular TrueType sources. With the subset feature (build-dependencies only), Embed::subset_to cuts each one with skera to the catalogs' characters from U+2E80 up plus CJK punctuation, kana and full-width forms, keeping every layout feature, and embeds the cut from OUT_DIR. for_ui without catalogs leaves the interface faces out with a warning; a CFF interface face is an error. check_text and the catalogs warn only about characters no embedded face covers.
81 lines
2.5 KiB
Python
Executable File
81 lines
2.5 KiB
Python
Executable File
#!/usr/bin/env -S uv run --script
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# /// script
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# requires-python = ">=3.10"
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# dependencies = ["fonttools==4.67.0"]
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# ///
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"""Write the subsetting fixtures next to this script: Tiny-glyf.ttf (TrueType outlines) and
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Tiny-cff.otf (CFF outlines). Both map the same characters, have a `vert` feature that swaps
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U+300C for a vertical form, and draw every glyph as a square.
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"""
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from pathlib import Path
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from fontTools.feaLib.builder import addOpenTypeFeaturesFromString
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from fontTools.fontBuilder import FontBuilder
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from fontTools.pens.t2CharStringPen import T2CharStringPen
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from fontTools.pens.ttGlyphPen import TTGlyphPen
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HERE = Path(__file__).resolve().parent
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CMAP = {
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0x20: "space",
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0x41: "A",
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0x3001: "uni3001",
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0x300C: "uni300C",
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0x3042: "uni3042",
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0x4E00: "uni4E00",
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0x4E01: "uni4E01",
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0x4E03: "uni4E03",
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0xFF01: "uniFF01",
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}
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GLYPHS = [".notdef", *CMAP.values(), "uni300C.vert"]
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FEATURES = "languagesystem DFLT dflt;\nfeature vert { sub uni300C by uni300C.vert; } vert;\n"
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# 2026-01-01, so the files are the same on every run.
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TIMESTAMP = 3_850_000_000
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def square(pen, size):
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pen.moveTo((100, 0))
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pen.lineTo((100, size))
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pen.lineTo((100 + size, size))
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pen.lineTo((100 + size, 0))
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pen.closePath()
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def build(cff: bool) -> FontBuilder:
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fb = FontBuilder(1000, isTTF=not cff)
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fb.setupGlyphOrder(GLYPHS)
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fb.setupCharacterMap(CMAP)
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if cff:
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charstrings = {}
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for i, name in enumerate(GLYPHS):
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pen = T2CharStringPen(1000, None)
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square(pen, 100 + 10 * i)
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charstrings[name] = pen.getCharString()
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fb.setupCFF("Tiny-Regular", {"FullName": "Tiny Regular"}, charstrings, {})
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else:
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glyphs = {}
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for i, name in enumerate(GLYPHS):
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pen = TTGlyphPen(None)
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square(pen, 100 + 10 * i)
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glyphs[name] = pen.glyph()
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fb.setupGlyf(glyphs)
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fb.setupHorizontalMetrics({name: (1000, 100) for name in GLYPHS})
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fb.setupHorizontalHeader(ascent=880, descent=-120)
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fb.setupNameTable({"familyName": "Tiny", "styleName": "Regular"})
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fb.setupOS2(sTypoAscender=880, sTypoDescender=-120, usWinAscent=880, usWinDescent=120)
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fb.setupPost()
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addOpenTypeFeaturesFromString(fb.font, FEATURES)
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fb.font["head"].created = TIMESTAMP
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fb.font["head"].modified = TIMESTAMP
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fb.font.recalcTimestamp = False
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return fb
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def main() -> None:
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build(cff=False).save(HERE / "Tiny-glyf.ttf")
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build(cff=True).save(HERE / "Tiny-cff.otf")
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if __name__ == "__main__":
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main()
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