def create_lookup(table, font, flag=0):
"""Create a Lookup based on mapping table."""
cmap = font_data.get_cmap(font)
ligatures = {}
for output, (ch1, ch2) in table.iteritems():
output = cmap[output]
ch1 = get_glyph_name_or_create(ch1, font)
ch2 = get_glyph_name_or_create(ch2, font)
ligature = otTables.Ligature()
ligature.CompCount = 2
ligature.Component = [ch2]
ligature.LigGlyph = output
try:
ligatures[ch1].append(ligature)
except KeyError:
ligatures[ch1] = [ligature]
ligature_subst = otTables.LigatureSubst()
ligature_subst.ligatures = ligatures
lookup = otTables.Lookup()
lookup.LookupType = 4
lookup.LookupFlag = flag
lookup.SubTableCount = 1
lookup.SubTable = [ligature_subst]
return lookup
def add_ligature(font, seq, name):
if 'GSUB' not in font:
ligature_subst = otTables.LigatureSubst()
ligature_subst.ligatures = {}
lookup = otTables.Lookup()
lookup.LookupType = 4
lookup.LookupFlag = 0
lookup.SubTableCount = 1
lookup.SubTable = [ligature_subst]
font['GSUB'] = add_emoji_gsub.create_simple_gsub([lookup])
else:
lookup = font['GSUB'].table.LookupList.Lookup[0]
assert lookup.LookupType == 4
assert lookup.LookupFlag == 0
ligatures = lookup.SubTable[0].ligatures
lig = otTables.Ligature()
lig.CompCount = len(seq)
lig.Component = seq[1:]
lig.LigGlyph = name
first = seq[0]
try:
ligatures[first].append(lig)
except KeyError:
ligatures[first] = [lig]
def add_ligature(font, codes):
if 'GSUB' not in font:
ligature_subst = otTables.LigatureSubst()
ligature_subst.ligatures = {}
lookup = otTables.Lookup()
lookup.LookupType = 4
lookup.LookupFlag = 0
lookup.SubTableCount = 1
lookup.SubTable = [ligature_subst]
font['GSUB'] = add_emoji_gsub.create_simple_gsub([lookup])
else:
lookup = font['GSUB'].table.LookupList.Lookup[0]
assert lookup.LookupType == 4
assert lookup.LookupFlag == 0
ligatures = lookup.SubTable[0].ligatures
lig = otTables.Ligature()
lig.CompCount = len(codes)
lig.Component = [glyph_name([code]) for code in codes[1:]]
lig.LigGlyph = glyph_name(codes)
first = "%04X" % int(codes[0], 16)
try:
ligatures[first].append(lig)
except KeyError:
ligatures[first] = [lig]
def build(self):
subtable = otTables.LigatureSubst()
subtable.Format = 1
subtable.ligatures = {}
for components in sorted(self.ligatures.keys(), key=self.make_key):
lig = otTables.Ligature()
lig.Component = components[1:]
lig.LigGlyph = self.ligatures[components]
subtable.ligatures.setdefault(components[0], []).append(lig)
return self.buildLookup_([subtable])
def _add_ligature(self, glyphstr):
lig = otTables.Ligature()
lig.CompCount = len(glyphstr)
lig.Component = [self.glyph_name(ch) for ch in glyphstr[1:]]
lig.LigGlyph = self.glyph_name(glyphstr)
first = self.glyph_name(glyphstr[0])
try:
self.ligatures[first].append(lig)
except KeyError:
self.ligatures[first] = [lig]
def parseLigature(self, lines, font, _lookupMap=None):
self.ligatures = {}
for line in lines:
assert len(line) >= 2, line
line = makeGlyphs(line)
# The following single line can replace the rest of this function with fontTools >= 3.1
#self.ligatures[tuple(line[1:])] = line[0]
ligGlyph, firstGlyph = line[:2]
otherComponents = line[2:]
ligature = ot.Ligature()
ligature.Component = otherComponents
ligature.CompCount = len(ligature.Component) + 1
ligature.LigGlyph = ligGlyph
self.ligatures.setdefault(firstGlyph, []).append(ligature)
def buildLigatureSubstSubtable(mapping):
if not mapping:
return None
self = ot.LigatureSubst()
# The following single line can replace the rest of this function
# with fontTools >= 3.1:
# self.ligatures = dict(mapping)
self.ligatures = {}
for components in sorted(mapping.keys(), key=_getLigatureKey):
ligature = ot.Ligature()
ligature.Component = components[1:]
ligature.CompCount = len(ligature.Component) + 1
ligature.LigGlyph = mapping[components]
firstGlyph = components[0]
self.ligatures.setdefault(firstGlyph, []).append(ligature)
return self
def build(self):
lookup = otTables.Lookup()
lookup.SubTable = []
st = otTables.LigatureSubst()
st.Format = 1
st.ligatures = {}
for components in sorted(self.ligatures.keys(), key=self.make_key):
lig = otTables.Ligature()
lig.Component = components
lig.LigGlyph = self.ligatures[components]
st.ligatures.setdefault(components[0], []).append(lig)
lookup.SubTable.append(st)
lookup.LookupFlag = self.lookup_flag
lookup.LookupType = self.lookup_type
lookup.SubTableCount = len(lookup.SubTable)
return lookup
def add_ligature(lookup, cmap, seq, name):
# The sequences consist of codepoints, but the entries in the ligature table
# are glyph names. Aliasing can give single codepoints names based on
# sequences (e.g. 'guardsman' with 'male guardsman') so we map the
# codepoints through the cmap to get the glyph names.
glyph_names = [cmap[cp] for cp in seq]
lig = otTables.Ligature()
lig.CompCount = len(seq)
lig.Component = glyph_names[1:]
lig.LigGlyph = name
ligatures = lookup.SubTable[0].ligatures
first_name = glyph_names[0]
try:
ligatures[first_name].append(lig)
except KeyError:
ligatures[first_name] = [lig]
def makeLigature(self, s):
"""'ffi' --> Ligature(LigGlyph='f_f_i', Component=['f', 'f', 'i'])"""
lig = otTables.Ligature()
lig.Component = list(s)
lig.LigGlyph = "_".join(lig.Component)
return lig
