def subsetFont(base64, subset):
# tmp file names
tmpInputFontName = tmpFileName(".ttf")
tmpOutputFontName = tmpFileName(".woff")
# remove data header from base64
fontbase64 = base64.split(",")[1]
with open(tmpInputFontName, "wb") as f:
fontinput = f.write(fontbase64.decode('base64'))
f.close()
# open the font with fontTools
font = TTFont(tmpInputFontName)
options = Options()
options.desubroutinize = True
# export the font as woff for web use
options.with_zopfli = True
options.flavor = "woff"
subsetter = Subsetter(options=options)
subsetter.populate(text=subset)
subsetter.subset(font)
save_font(font, tmpOutputFontName, options)
subsettedFont = open(tmpOutputFontName, "rb").read().encode("base64")
os.unlink(tmpOutputFontName)
os.unlink(tmpInputFontName)
return {'subset': subsettedFont}
def __generateForWeight(self, weight: str, font: Font) -> None:
package = self.__core.package
base_dir = self.__core.directories.webfonts
output_dir = base_dir.joinpath(f"./{package.version}/{weight}")
font_path = self.__core.findFontfilePath(font)
output_dir.mkdir(parents=True, exist_ok=True)
metadata = self.__generateMetadata()
fake = Faker()
fake.seed(package.id)
subset_fontname: str = fake.name()
options = Options()
options.font_number = font.number
options.hinting = False
options.desubroutinize = True
options.drop_tables += [
'FFTM', 'PfEd', 'TeX', 'BDF', 'cvt', 'fpgm', 'prep', 'gasp',
'VORG', 'CBDT', 'CBLC', 'sbix'
]
for ignored in ['rvrn', 'locl']:
options.layout_features.remove(ignored)
for unicodes_file in FILE_DIR.UNICODE_TEXT.glob('./**/*.txt'):
idx = unicodes_file.stem
unicodes: List[str] = []
with open(unicodes_file, 'r') as unicode_read_io:
for line in unicode_read_io.readlines():
unicodes.extend(parse_unicodes(line.split('#')[0]))
with load_font(font_path, options) as ttfont:
subsetter = Subsetter(options=options)
subsetter.populate(unicodes=unicodes)
subsetter.subset(ttfont)
for record in ttfont['name'].names:
if record.nameID == NAME_ID.COPYRIGHT:
record.string = '\n'.join(package.copyrights)
elif record.nameID in FAMILY_RELATED_NAME_ID:
record.string = subset_fontname
woff_file = output_dir.joinpath(f"{idx}.woff")
with open(woff_file, 'wb') as woff_write_io:
options.flavor = 'woff'
ttfont.flavorData = WOFFFlavorData()
ttfont.flavorData.metaData = metadata
save_font(ttfont, woff_write_io, options)
woff2_file = output_dir.joinpath(f"{idx}.woff2")
with open(woff2_file, 'wb') as woff2_write_io:
options.flavor = 'woff2'
ttfont.flavorData = WOFF2FlavorData()
ttfont.flavorData.metaData = metadata
save_font(ttfont, woff2_write_io, options)
def subset(fontfile, outfile_basename, glyphs):
options = Options()
# Fonttools has this "feature" that if you enable 'dlig', it will also give
# you glyphs that you did not ask for, but if you do not enable 'dlig',
# then discretionary ligatures do not render properly.
# See https://github.com/behdad/fonttools/issues/43.
# As a workaround, only enable 'dlig' if there are glyphs for discretionary
# ligatures.
dligs = set(glyphs).intersection([
'c_b', 'c_h', 'c_k', 'c_p', 'ct', 'g_i', 'q_u', 's_b', 's_h', 's_k',
's_p', 'st'
])
if len(dligs) > 0:
options.layout_features.append('dlig')
else:
# Due to a bug in Fonttools, options are actually global, so the
# remnants of the previous instance are visible here.
# See https://github.com/behdad/fonttools/issues/413.
if 'dlig' in options.layout_features:
options.layout_features.remove('dlig')
# Same for small caps, it needs to be enabled explicitly. Luckily, only the
# glyphs in the list get included, no extra ones.
if any(g.endswith('.smcp') for g in glyphs):
options.layout_features.append('smcp')
options.layout_features.append('c2sc')
else:
if 'smcp' in options.layout_features:
options.layout_features.remove('smcp')
if 'c2sc' in options.layout_features:
options.layout_features.remove('c2sc')
# Fonts that went through the FontForge roundtrip will have subroutinized
# programs in the CFF table. This presumably reduces file size for full
# fonts, but on subsetted fonts it hurts file size and compressability, so
# desubroutinize.
options.desubroutinize = True
font = load_font(fontfile, options)
subsetter = Subsetter(options=options)
subsetter.populate(glyphs=glyphs)
subsetter.subset(font)
prune_cmaps(font)
options.flavor = "woff"
save_font(font, outfile_basename + ".woff", options)
options.flavor = "woff2"
save_font(font, outfile_basename + ".woff2", options)
font.close()
def subset(fontfile, outfile_basename, glyphs):
options = Options()
# Fonttools has this feature that if you enable 'dlig', it will also give
# you glyphs that you did not ask for, but if you do not enable 'dlig',
# then discretionary ligatures do not render properly.
# See https://github.com/behdad/fonttools/issues/43.
# As a workaround, only enable 'dlig' if there are glyphs for discretionary
# ligatures.
# TODO: This should be fixed, consider upgrading.
# https://github.com/fonttools/fonttools/commit/022536212be4cf022a2cb9a286fec8be1931d19b.
dligs = set(glyphs).intersection(['c_b', 'c_h', 'c_k', 'c_p', 'ct', 'g_i',
'q_u', 's_b', 's_h', 's_k', 's_p', 'st'])
if len(dligs) > 0:
options.layout_features.append('dlig')
else:
# Due to a bug in Fonttools, options are actually global, so the
# remnants of the previous instance are visible here.
# See https://github.com/behdad/fonttools/issues/413.
if 'dlig' in options.layout_features:
options.layout_features.remove('dlig')
# Same for small caps, it needs to be enabled explicitly. Luckily, only the
# glyphs in the list get included, no extra ones.
if any(g.endswith('.smcp') for g in glyphs):
options.layout_features.append('smcp')
options.layout_features.append('c2sc')
else:
if 'smcp' in options.layout_features:
options.layout_features.remove('smcp')
if 'c2sc' in options.layout_features:
options.layout_features.remove('c2sc')
# Fonts that went through the FontForge roundtrip will have subroutinized
# programs in the CFF table. This presumably reduces file size for full
# fonts, but on subsetted fonts it hurts file size and compressability, so
# desubroutinize.
options.desubroutinize = True
font = load_font(fontfile, options)
subsetter = Subsetter(options = options)
subsetter.populate(glyphs = glyphs)
subsetter.subset(font)
prune_cmaps(font)
options.flavor = "woff"
save_font(font, outfile_basename + ".woff", options)
options.flavor = "woff2"
save_font(font, outfile_basename + ".woff2", options)
font.close()
def subset(fontfile, outfile_basename, glyphs):
options = Options()
# Fonttools has this "feature" that if you enable 'dlig', it will also give
# you glyphs that you did not ask for, but if you do not enable 'dlig',
# then discretionary ligatures do not render properly.
# See https://github.com/behdad/fonttools/issues/43.
# As a workaround, only enable 'dlig' if there are glyphs for discretionary
# ligatures.
dligs = set(glyphs).intersection(["c_b", "c_h", "c_k", "c_p", "ct", "g_i", "q_u", "s_b", "s_h", "s_k", "s_p", "st"])
if len(dligs) > 0:
options.layout_features.append("dlig")
else:
# Due to a bug in Fonttools, options are actually global, so the
# remnants of the previous instance are visible here.
# See https://github.com/behdad/fonttools/issues/413.
if "dlig" in options.layout_features:
options.layout_features.remove("dlig")
# Same for small caps, it needs to be enabled explicitly. Luckily, only the
# glyphs in the list get included, no extra ones.
if any(g.endswith(".smcp") for g in glyphs):
options.layout_features.append("smcp")
options.layout_features.append("c2sc")
else:
if "smcp" in options.layout_features:
options.layout_features.remove("smcp")
if "c2sc" in options.layout_features:
options.layout_features.remove("c2sc")
# Fonts that went through the FontForge roundtrip will have subroutinized
# programs in the CFF table. This presumably reduces file size for full
# fonts, but on subsetted fonts it hurts file size and compressability, so
# desubroutinize.
options.desubroutinize = True
font = load_font(fontfile, options)
subsetter = Subsetter(options=options)
subsetter.populate(glyphs=glyphs)
subsetter.subset(font)
prune_cmaps(font)
options.flavor = "woff"
save_font(font, outfile_basename + ".woff", options)
options.flavor = "woff2"
save_font(font, outfile_basename + ".woff2", options)
font.close()
def subsetFont(fontPath, subset):
tmpOutputFontName = os.path.dirname(
os.path.abspath(__file__)) + "/tmp/" + str(uuid.uuid4()) + ".woff"
font = TTFont(fontPath)
options = Options()
options.desubroutinize = True
options.with_zopfli = True
options.flavor = "woff"
subsetter = Subsetter(options=options)
subsetter.populate(text=subset)
subsetter.subset(font)
save_font(font, tmpOutputFontName, options)
subsettedFont = 'data:;base64,' + open(tmpOutputFontName,
"rb").read().encode("base64")
cleanUp([tmpOutputFontName])
print subsettedFont.replace('\n', '')