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#!/usr/bin/env python3
__doc__ = 'Convert font between ttf, woff, woff2'
__url__ = 'https://github.com/silnrsi/pysilfont'
__copyright__ = 'Copyright (c) 2021 SIL International (https://www.sil.org)'
__license__ = 'Released under the MIT License (https://opensource.org/licenses/MIT)'
__author__ = 'Bob Hallissy'
from silfont.core import execute
from fontTools.ttLib import TTFont
from fontTools.ttLib.sfnt import WOFFFlavorData
from fontTools.ttLib.woff2 import WOFF2FlavorData
import os.path
argspec = [
('infont', {'help': 'Source font file (can be ttf, woff, or woff2)'}, {}),
('-m', '--metadata', {'help': 'file containing XML WOFF metadata', 'default': None}, {}),
('--privatedata', {'help': 'file containing WOFF privatedata', 'default': None}, {}),
('-v', '--version', {'help': 'woff font version number in major.minor', 'default': None}, {}),
('--ttf', {'help': 'name of ttf file to be written', 'nargs': '?', 'default': None, 'const': '-'}, {}),
('--woff', {'help': 'name of woff file to be written', 'nargs': '?', 'default': None, 'const': '-'}, {}),
('--woff2', {'help': 'name of woff2 file to be written', 'nargs': '?', 'default': None, 'const': '-'}, {}),
('-l', '--log', {'help': 'Log file'}, {'type': 'outfile', 'def': '_woffit.log'})]
def doit(args):
logger = args.logger
infont = args.infont
font = TTFont(args.infont)
defaultpath = os.path.splitext(infont)[0]
inFlavor = font.flavor or 'ttf'
logger.log(f'input font {infont} is a {inFlavor}', 'I')
# Read & parse version, if provided
flavorData = WOFFFlavorData() # Initializes all fields to None
if args.version:
try:
version = float(args.version)
if version < 0:
raise ValueError('version cannot be negative')
flavorData.majorVersion, flavorData.minorVersion = map(int, format(version, '.3f').split('.'))
except:
logger.log(f'invalid version syntax "{args.version}": should be MM.mmm', 'S')
else:
try:
flavorData.majorVersion = font.flavorData.majorVersion
flavorData.minorVersion = font.flavorData.minorVersion
except:
# Pull version from head table
head = font['head']
flavorData.majorVersion, flavorData.minorVersion =map(int, format(head.fontRevision, '.3f').split('.'))
# Read metadata if provided, else get value from input font
if args.metadata:
try:
with open(args.metadata, 'rb') as f:
flavorData.metaData = f.read()
except:
logger.log(f'Unable to read file "{args.metadata}"', 'S')
elif inFlavor != 'ttf':
flavorData.metaData = font.flavorData.metaData
# Same process for private data
if args.privatedata:
try:
with open(args.privatedata, 'rb') as f:
flavorData.privData = f.read()
except:
logger.log(f'Unable to read file "{args.privatedata}"', 'S')
elif inFlavor != 'ttf':
flavorData.privData = font.flavorData.privData
if args.woff:
font.flavor = 'woff'
font.flavorData = flavorData
fname = f'{defaultpath}.{font.flavor}' if args.woff2 == '-' else args.woff
logger.log(f'Writing {font.flavor} font to "{fname}"', 'P')
font.save(fname)
if args.woff2:
font.flavor = 'woff2'
font.flavorData = WOFF2FlavorData(data=flavorData)
fname = f'{defaultpath}.{font.flavor}' if args.woff2 == '-' else args.woff2
logger.log(f'Writing {font.flavor} font to "{fname}"', 'P')
font.save(fname)
if args.ttf:
font.flavor = None
font.flavorData = None
fname = f'{defaultpath}.ttf' if args.ttf == '-' else args.ttf
logger.log(f'Writing ttf font to "{fname}"', 'P')
font.save(fname)
font.close()
def cmd() : execute('FT',doit, argspec)
if __name__ == "__main__": cmd()
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