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[cffLib.specializer] Add cmdline to specialize a CFF2 font

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This commit is contained in:
Behdad Esfahbod 2024-10-27 16:41:19 -07:00
parent 4ad6b0db13
commit 7a0062a718
1 changed files with 60 additions and 19 deletions
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43
Lib/fontTools/cffLib/specializer.py
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@ -822,13 +822,28 @@ if __name__ == "__main__":
default=None,
help="Number of variable-font regions for blend opertaions.",
)
parser.add_argument(
"--font",
metavar="FONTFILE",
default=None,
help="CFF2 font to specialize.",
)
parser.add_argument(
"-o",
"--output-file",
type=str,
help="Output font file name.",
)
options = parser.parse_args(sys.argv[1:])
if options.program:
getNumRegions = (
None
if options.num_regions is None
else lambda vsIndex: int(options.num_regions[0 if vsIndex is None else vsIndex])
else lambda vsIndex: int(
options.num_regions[0 if vsIndex is None else vsIndex]
)
)
program = stringToProgram(options.program)
@ -845,3 +860,29 @@ if __name__ == "__main__":
print(programToString(generalizeProgram(program, getNumRegions)))
print("Specialized program:")
print(programToString(specializeProgram(program, getNumRegions)))
if options.font:
from fontTools.ttLib import TTFont
font = TTFont(options.font)
cff2 = font["CFF2"].cff.topDictIndex[0]
charstrings = cff2.CharStrings
for glyphName in charstrings.keys():
charstring = charstrings[glyphName]
charstring.decompile()
getNumRegions = charstring.private.getNumRegions
charstring.program = specializeProgram(
charstring.program, getNumRegions, maxstack=maxStackLimit
)
if options.output_file is None:
from fontTools.misc.cliTools import makeOutputFileName
outfile = makeOutputFileName(
options.font, overWrite=True, suffix=".specialized"
)
else:
outfile = options.output_file
if outfile:
print("Saving", outfile)
font.save(outfile)