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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
LATIN = (
range(0x0020, 0x007F) + range(0x00A0, 0x0100) +
[0x0131, 0x0152, 0x0153, 0x02C6, 0x02DA, 0x02DC, 0x2013, 0x2014, 0x2018,
0x2019, 0x201A, 0x201C, 0x201D, 0x201E, 0x2022, 0x2039, 0x203A, 0x2044,
0x2074, 0x20AC, 0x2212, 0x2215])
CYRILLIC = (
range(0x0400, 0x0460) +
[0x0490, 0x0491, 0x04B0, 0x04B1, 0x20BD, 0x2116])
SUBSETS = {
'cyrillic': LATIN + CYRILLIC,
'cyrillic-ext': (
LATIN + CYRILLIC + range(0x0460, 0x0530) + [0x20B4] +
range(0x2DE0, 0x2E00) + range(0xA640, 0xA6A0)),
'greek': LATIN + range(0x0370, 0x0400),
'greek-ext': LATIN + range(0x0384, 0x0400) + range(0x1F00, 0x2000),
'latin': LATIN,
'latin-ext': (
LATIN + range(0x0100, 0x0370) +
[0x02BC, 0x0300, 0x0301, 0x0303, 0x030F] +
range(0x1D00, 0x1F00) +
[0x2026] +
range(0x2070, 0x20D0) +
range(0x2C60, 0x2C80) +
range(0xA700, 0xA800)),
'menu': [ord(c) for c in u' ()DEKNQRabcfgoprtuvĸ΄ΕάαεηικλνКаилрцốữ'],
'vietnamese': (
LATIN +
[0x0102, 0x0103, 0x0110, 0x0111, 0x0128, 0x0129, 0x0168, 0x0169,
0x01A0, 0x01A1, 0x01AF, 0x01B0, 0x02D8, 0x0309, 0x0323] +
range(0x1EA0, 0x1EFA) + [0x20AB]),
}
SUBSETS = {k: frozenset(v) for k, v in SUBSETS.iteritems()}
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})
for suffix in SUBSETS.keys():
subset_filename = target_filename.replace('ttf', suffix)
subset.subset_font(
target_filename, subset_filename,
include=SUBSETS[suffix])
if __name__ == '__main__':
main(sys.argv)
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