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from argparse import RawTextHelpFormatter
from textwrap import dedent
from fontTools.ttLib import TTFont
from fontTools.otlLib.optimize.gpos import compact, GPOS_COMPACT_MODE_DEFAULT
def main(args=None):
"""Optimize the layout tables of an existing font."""
from argparse import ArgumentParser
from fontTools import configLogger
parser = ArgumentParser(prog="otlLib.optimize", description=main.__doc__, formatter_class=RawTextHelpFormatter)
parser.add_argument("font")
parser.add_argument(
"-o", metavar="OUTPUTFILE", dest="outfile", default=None, help="output file"
)
parser.add_argument(
"--gpos-compact-mode",
help=dedent(
f"""\
GPOS Lookup type 2 (PairPos) compaction mode:
0 = do not attempt to compact PairPos lookups;
1 to 8 = create at most 1 to 8 new subtables for each existing
subtable, provided that it would yield a 50%% file size saving;
9 = create as many new subtables as needed to yield a file size saving.
Default: {GPOS_COMPACT_MODE_DEFAULT}.
This compaction aims to save file size, by splitting large class
kerning subtables (Format 2) that contain many zero values into
smaller and denser subtables. It's a trade-off between the overhead
of several subtables versus the sparseness of one big subtable.
See the pull request: https://github.com/fonttools/fonttools/pull/2326
"""
),
default=int(GPOS_COMPACT_MODE_DEFAULT),
choices=list(range(10)),
type=int,
)
logging_group = parser.add_mutually_exclusive_group(required=False)
logging_group.add_argument(
"-v", "--verbose", action="store_true", help="Run more verbosely."
)
logging_group.add_argument(
"-q", "--quiet", action="store_true", help="Turn verbosity off."
)
options = parser.parse_args(args)
configLogger(
level=("DEBUG" if options.verbose else "ERROR" if options.quiet else "INFO")
)
font = TTFont(options.font)
# TODO: switch everything to have type(mode) = int when using the Config class
compact(font, str(options.gpos_compact_mode))
font.save(options.outfile or options.font)
if __name__ == "__main__":
import sys
if len(sys.argv) > 1:
sys.exit(main())
import doctest
sys.exit(doctest.testmod().failed)
|
