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#!/usr/bin/python
# coding=UTF-8
#
# Copyright 2014 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.
"""Subset for web fonts."""
__author__ = 'roozbeh@google.com (Roozbeh Pournader)'
import sys
from nototools import subset
def read_charlist(filename):
"""Returns a list of characters read from a charset text file."""
with open(filename) as datafile:
charlist = []
for line in datafile:
if '#' in line:
line = line[:line.index('#')]
line = line.strip()
if not line:
continue
if line.startswith('U+'):
line = line[2:]
char = int(line, 16)
charlist.append(char)
return charlist
def main(argv):
"""Subset the first argument to second, dropping unused parts of the font.
"""
charlist = read_charlist('res/charsets/web.txt')
# Add private use characters for legacy reasons
charlist += [0xEE01, 0xEE02, 0xF6C3]
features_to_keep = [
'c2sc', 'ccmp', 'cpsp', 'dlig', 'dnom', 'frac', 'kern', 'liga', 'lnum',
'locl', 'numr', 'onum', 'pnum', 'smcp', 'ss01', 'ss02', 'ss03', 'ss04',
'ss05', 'ss06', 'ss07', 'tnum']
source_filename = argv[1]
target_filename = argv[2]
subset.subset_font(
source_filename, target_filename,
include=charlist,
options={'layout_features': features_to_keep})
if __name__ == '__main__':
main(sys.argv)
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