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117 lines
3.6 KiB
Python
117 lines
3.6 KiB
Python
# /// script
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# requires-python = ">=3.11"
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# dependencies = ["fonttools==4.59.0"]
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# ///
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"""Generate original triangle glyphs that distinguish text stroke joins."""
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from pathlib import Path
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from fontTools.colorLib.builder import buildCOLR, buildCPAL
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from fontTools.fontBuilder import FontBuilder
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from fontTools.pens.ttGlyphPen import TTGlyphPen
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from fontTools.ttLib import TTFont, newTable
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from fontTools.ttLib.scaleUpem import scale_upem
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from fontTools.ttLib.tables.S_V_G_ import SVGDocument
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def triangle(left: int, right: int):
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pen = TTGlyphPen(None)
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pen.moveTo((left, 0))
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pen.lineTo((right, 0))
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pen.lineTo((300, 800))
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pen.closePath()
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return pen.glyph()
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def line(start: tuple[int, int], end: tuple[int, int]):
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pen = TTGlyphPen(None)
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pen.moveTo(start)
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pen.lineTo(end)
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pen.closePath()
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return pen.glyph()
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def rectangle():
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pen = TTGlyphPen(None)
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pen.moveTo((0, 0))
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pen.lineTo((600, 0))
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pen.lineTo((600, 800))
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pen.lineTo((0, 800))
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pen.closePath()
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return pen.glyph()
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builder = FontBuilder(1000, isTTF=True)
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glyphs = {
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".notdef": triangle(0, 600),
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"A": triangle(0, 600),
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"B": triangle(200, 400),
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"C": triangle(200, 400),
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"D": line((300, 0), (300, 800)),
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"E": line((0, 400), (600, 400)),
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"space": TTGlyphPen(None).glyph(),
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"R": rectangle(),
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}
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builder.setupGlyphOrder(list(glyphs))
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builder.setupCharacterMap({**{ord(ch): ch for ch in "ABCDER"}, ord(" "): "space"})
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builder.setupGlyf(glyphs)
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builder.setupHorizontalMetrics(
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{name: (600, {"B": 200, "C": -500, "D": 300}.get(name, 0)) for name in glyphs}
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)
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builder.setupHorizontalHeader(ascent=800, descent=-200)
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builder.setupNameTable(
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{
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"familyName": "Moli Text Stroke Test",
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"styleName": "Regular",
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"uniqueFontIdentifier": "Moli Text Stroke Test 1.0",
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"fullName": "Moli Text Stroke Test",
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"psName": "MoliTextStrokeTest",
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"version": "Version 1.000",
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}
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)
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builder.setupOS2(
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sTypoAscender=800, sTypoDescender=-200, usWinAscent=800, usWinDescent=200
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)
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builder.setupPost()
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builder.setupMaxp()
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builder.setupHead(flags=1, created=2_082_844_800, modified=2_082_844_800)
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builder.save(
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Path(__file__).resolve().parents[1]
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/ "moli-paint/tests/fixtures/moli-text-stroke.ttf"
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)
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scale_upem(builder.font, 250)
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builder.save(
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Path(__file__).resolve().parents[1]
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/ "moli-paint/tests/fixtures/moli-text-stroke-250.ttf"
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)
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# Keep the original glyf outlines. Moli's PDF backend does not install an SVG
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# renderer, so R must fall back to its rectangle even though it has SVG data.
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fixtures = Path(__file__).resolve().parents[1] / "moli-paint/tests/fixtures"
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svg_font = TTFont(fixtures / "moli-text-stroke.ttf", recalcTimestamp=False)
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svg_font["SVG "] = newTable("SVG ")
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glyph_id = svg_font.getGlyphID("R")
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svg_font["SVG "].docList = [
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SVGDocument(
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'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 -800 600 1000">'
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'<rect x="0" y="-800" width="600" height="800" fill="lime"/></svg>',
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glyph_id,
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glyph_id,
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)
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]
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svg_font.save(fixtures / "moli-text-stroke-svg.ttf")
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# A half-transparent COLR rectangle makes repeated painting observable in the
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# interior, independently of anti-aliasing or the base triangle's outline.
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for svg in [False, True]:
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color_font = TTFont(
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fixtures / ("moli-text-stroke-svg.ttf" if svg else "moli-text-stroke.ttf"),
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recalcTimestamp=False,
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)
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color_font["COLR"] = buildCOLR(
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{"A": [("R", 0)]}, version=0, glyphMap=color_font.getReverseGlyphMap()
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)
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color_font["CPAL"] = buildCPAL([[(1.0, 0.0, 0.0, 0.5)]])
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suffix = "-svg" if svg else ""
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color_font.save(fixtures / f"moli-text-stroke-colr{suffix}.ttf")
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