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#!/usr/bin/env python
#
# Copyright 2015 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import argparse
from compreffor import pyCompressor
class SimpleSubstringFinder(pyCompressor.SubstringFinder):
def get_substrings(self, min_freq=2, check_positive=True, sort_by_length=False):
movetos = set()
for idx, tok in enumerate(self.rev_keymap):
if isinstance(tok, basestring) and tok[-6:] == "moveto":
movetos.add(idx)
try:
hmask = self.rev_keymap.index("hintmask")
except ValueError:
hmask = None
matches = {}
for glyph_idx, program in enumerate(self.data):
cur_start = 0
last_op = -1
for pos, tok in enumerate(program):
if tok in movetos:
stop = last_op + 1
if stop - cur_start > 0:
if program[cur_start:stop] in matches:
matches[program[cur_start:stop]].freq += 1
else:
span = pyCompressor.CandidateSubr(stop - cur_start,
(glyph_idx, cur_start),
1,
self.data,
self.cost_map)
matches[program[cur_start:stop]] = span
cur_start = pos + 1
elif tok == hmask:
last_op = pos + 1
elif type(self.rev_keymap[tok]) == str:
last_op = pos
constraints = lambda s: (s.freq >= min_freq and
(s.subr_saving() > 0 or not check_positive))
self.substrings = filter(constraints, matches.values())
if sort_by_length:
self.substrings.sort(key=lambda s: len(s))
else:
self.substrings.sort(key=lambda s: s.subr_saving(), reverse=True)
return self.substrings
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Subroutinize a font.')
parser.add_argument('filename', help='Where to find the font', nargs='*')
parser.add_argument('-t', required=False, action='store_true',
dest='test', default=False)
parser.add_argument('-v', required=False, action='store_true',
dest='verbose_test', default=False)
parser.add_argument('-c', required=False, action='store_true',
dest='check', default=False)
kwargs = vars(parser.parse_args())
pyCompressor.SubstringFinder = SimpleSubstringFinder
pyCompressor.main(**kwargs)
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