81 lines
2.3 KiB
Python
81 lines
2.3 KiB
Python
"""
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Instantiate a variation font. Run, eg:
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$ python mutator.py ./NotoSansArabic-VF.ttf wght=140 wdth=85
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"""
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from __future__ import print_function, division, absolute_import
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from fontTools.misc.py23 import *
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from fontTools.ttLib import TTFont
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from fontTools.ttLib.tables._g_l_y_f import GlyphCoordinates
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from fontTools.varLib import _GetCoordinates, _SetCoordinates
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from fontTools.varLib.models import VariationModel, supportScalar, normalizeLocation
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import os.path
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def main(args=None):
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if args is None:
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import sys
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args = sys.argv[1:]
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varfilename = args[0]
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locargs = args[1:]
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outfile = os.path.splitext(varfilename)[0] + '-instance.ttf'
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loc = {}
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for arg in locargs:
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tag,val = arg.split('=')
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assert len(tag) <= 4
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loc[tag.ljust(4)] = float(val)
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print("Location:", loc)
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print("Loading variable font")
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varfont = TTFont(varfilename)
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fvar = varfont['fvar']
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axes = {a.axisTag:(a.minValue,a.defaultValue,a.maxValue) for a in fvar.axes}
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# TODO Round to F2Dot14?
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loc = normalizeLocation(loc, axes)
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# Location is normalized now
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print("Normalized location:", loc)
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gvar = varfont['gvar']
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glyf = varfont['glyf']
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# get list of glyph names in gvar sorted by component depth
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glyphnames = sorted(
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gvar.variations.keys(),
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key=lambda name: (
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glyf[name].getCompositeMaxpValues(glyf).maxComponentDepth
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if glyf[name].isComposite() else 0,
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name))
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for glyphname in glyphnames:
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variations = gvar.variations[glyphname]
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coordinates,_ = _GetCoordinates(varfont, glyphname)
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origCoords, endPts = None, None
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for var in variations:
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scalar = supportScalar(loc, var.axes)
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if not scalar: continue
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delta = var.coordinates
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if None in delta:
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if origCoords is None:
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origCoords,control = _GetCoordinates(varfont, glyphname)
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endPts = control[1] if control[0] >= 1 else list(range(len(control[1])))
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# TODO Do IUP / handle None items
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coordinates += GlyphCoordinates(delta) * scalar
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_SetCoordinates(varfont, glyphname, coordinates)
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print("Removing variable tables")
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for tag in ('avar','cvar','fvar','gvar','HVAR','MVAR','VVAR','STAT'):
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if tag in varfont:
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del varfont[tag]
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print("Saving instance font", outfile)
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varfont.save(outfile)
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if __name__ == "__main__":
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import sys
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if len(sys.argv) > 1:
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sys.exit(main())
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import doctest
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sys.exit(doctest.testmod().failed)
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