def buildGSUB():
"""Build a GSUB table from scratch."""
fontTable = newTable("GSUB")
gsub = fontTable.table = ot.GSUB()
gsub.Version = 0x00010001 # allow gsub.FeatureVariations
gsub.ScriptList = ot.ScriptList()
gsub.ScriptList.ScriptRecord = []
gsub.FeatureList = ot.FeatureList()
gsub.FeatureList.FeatureRecord = []
gsub.LookupList = ot.LookupList()
gsub.LookupList.Lookup = []
srec = ot.ScriptRecord()
srec.ScriptTag = 'DFLT'
srec.Script = ot.Script()
srec.Script.DefaultLangSys = None
srec.Script.LangSysRecord = []
langrec = ot.LangSysRecord()
langrec.LangSys = ot.LangSys()
langrec.LangSys.ReqFeatureIndex = 0xFFFF
langrec.LangSys.FeatureIndex = [0]
srec.Script.DefaultLangSys = langrec.LangSys
gsub.ScriptList.ScriptRecord.append(srec)
gsub.FeatureVariations = None
return fontTable
def create_lookup_list(lookups):
"""Create a LookupList for the GSUB table."""
lookup_list = otTables.LookupList()
lookup_list.LookupCount = len(lookups)
lookup_list.Lookup = lookups
return lookup_list
def add_gsub_to_font(fontfile):
"""Adds an empty GSUB table to a font."""
font = ttLib.TTFont(fontfile)
gsub_table = ttLib.getTableClass('GSUB')('GSUB')
gsub_table.table = otTables.GSUB()
gsub_table.table.Version = 1.0
gsub_table.table.ScriptList = otTables.ScriptList()
gsub_table.table.ScriptCount = 1
gsub_table.table.LookupList = otTables.LookupList()
gsub_table.table.LookupList.LookupCount = 0
gsub_table.table.LookupList.Lookup = []
gsub_table.table.FeatureList = otTables.FeatureList()
gsub_table.table.FeatureList.FeatureCount = 0
gsub_table.table.LookupList.FeatureRecord = []
script_record = otTables.ScriptRecord()
script_record.ScriptTag = get_opentype_script_tag(fontfile)
script_record.Script = otTables.Script()
script_record.Script.LangSysCount = 0
script_record.Script.LangSysRecord = []
default_lang_sys = otTables.DefaultLangSys()
default_lang_sys.FeatureIndex = []
default_lang_sys.FeatureCount = 0
default_lang_sys.LookupOrder = None
default_lang_sys.ReqFeatureIndex = 65535
script_record.Script.DefaultLangSys = default_lang_sys
gsub_table.table.ScriptList.ScriptRecord = [script_record]
font['GSUB'] = gsub_table
target_file = tempfile.gettempdir() + '/' + os.path.basename(fontfile)
font.save(target_file)
return target_file
def merge(self, m, tables):
assert len(tables) == len(m.duplicateGlyphsPerFont)
for i, (table, dups) in enumerate(zip(tables, m.duplicateGlyphsPerFont)):
if not dups: continue
assert (table is not None and table is not NotImplemented
), "Have duplicates to resolve for font %d but no GSUB: %s" % (
i + 1, dups)
synthFeature = None
synthLookup = None
for script in table.table.ScriptList.ScriptRecord:
if script.ScriptTag == 'DFLT': continue # XXX
for langsys in [script.Script.DefaultLangSys] + [
l.LangSys for l in script.Script.LangSysRecord
]:
if langsys is None: continue # XXX Create!
feature = [
v for v in langsys.FeatureIndex if v.FeatureTag == 'locl'
]
assert len(feature) <= 1
if feature:
feature = feature[0]
else:
if not synthFeature:
synthFeature = otTables.FeatureRecord()
synthFeature.FeatureTag = 'locl'
f = synthFeature.Feature = otTables.Feature()
f.FeatureParams = None
f.LookupCount = 0
f.LookupListIndex = []
langsys.FeatureIndex.append(synthFeature)
langsys.FeatureIndex.sort(key=lambda v: v.FeatureTag)
table.table.FeatureList.FeatureRecord.append(
synthFeature)
table.table.FeatureList.FeatureCount += 1
feature = synthFeature
if not synthLookup:
subtable = otTables.SingleSubst()
subtable.mapping = dups
synthLookup = otTables.Lookup()
synthLookup.LookupFlag = 0
synthLookup.LookupType = 1
synthLookup.SubTableCount = 1
synthLookup.SubTable = [subtable]
if table.table.LookupList is None:
# mtiLib uses None as default value for LookupList,
# while feaLib points to an empty array with count 0
# TODO: make them do the same
table.table.LookupList = otTables.LookupList()
table.table.LookupList.Lookup = []
table.table.LookupList.LookupCount = 0
table.table.LookupList.Lookup.append(synthLookup)
table.table.LookupList.LookupCount += 1
feature.Feature.LookupListIndex[:0] = [synthLookup]
feature.Feature.LookupCount += 1
DefaultTable.merge(self, m, tables)
return self
def doit(args):
font = args.ifont
args.type = args.type.upper()
for tag in ('GSUB', 'GPOS'):
if tag == args.type or args.type == 'BOTH':
table = ttLib.getTableClass(tag)()
t = getattr(otTables, tag, None)()
t.Version = 1.0
t.ScriptList = otTables.ScriptList()
t.ScriptList.ScriptRecord = []
t.FeatureList = otTables.FeatureList()
t.FeatureList.FeatureRecord = []
t.LookupList = otTables.LookupList()
t.LookupList.Lookup = []
srec = otTables.ScriptRecord()
srec.ScriptTag = args.script
srec.Script = otTables.Script()
srec.Script.DefaultLangSys = None
srec.Script.LangSysRecord = []
t.ScriptList.ScriptRecord.append(srec)
t.ScriptList.ScriptCount = 1
t.FeatureList.FeatureCount = 0
t.LookupList.LookupCount = 0
table.table = t
font[tag] = table
return font
def parseGSUBGPOS(lines, font, tableTag):
container = ttLib.getTableClass(tableTag)()
lookupMap = DeferredMapping()
featureMap = DeferredMapping()
assert tableTag in ('GSUB', 'GPOS')
log.debug("Parsing %s", tableTag)
self = getattr(ot, tableTag)()
self.Version = 0x00010000
fields = {
'script table begin':
('ScriptList',
lambda lines: parseScriptList (lines, featureMap)),
'feature table begin':
('FeatureList',
lambda lines: parseFeatureList (lines, lookupMap, featureMap)),
'lookup':
('LookupList',
None),
}
for attr,parser in fields.values():
setattr(self, attr, None)
while lines.peek() is not None:
typ = lines.peek()[0].lower()
if typ not in fields:
log.debug('Skipping %s', lines.peek())
next(lines)
continue
attr,parser = fields[typ]
if typ == 'lookup':
if self.LookupList is None:
self.LookupList = ot.LookupList()
self.LookupList.Lookup = []
_, name, _ = lines.peek()
lookup = parseLookup(lines, tableTag, font, lookupMap)
if lookupMap is not None:
assert name not in lookupMap, "Duplicate lookup name: %s" % name
lookupMap[name] = len(self.LookupList.Lookup)
else:
assert int(name) == len(self.LookupList.Lookup), "%d %d" % (name, len(self.Lookup))
self.LookupList.Lookup.append(lookup)
else:
assert getattr(self, attr) is None, attr
setattr(self, attr, parser(lines))
if self.LookupList:
self.LookupList.LookupCount = len(self.LookupList.Lookup)
if lookupMap is not None:
lookupMap.applyDeferredMappings()
if featureMap is not None:
featureMap.applyDeferredMappings()
container.table = self
return container
def _add_gpos_table(self):
logger.info('Adding GPOS table to "%s"', self)
ttfont = self.ttfont
assert ttfont.get('GPOS') is None
table = otTables.GPOS()
table.Version = 0x00010000
table.ScriptList = otTables.ScriptList()
table.ScriptList.ScriptRecord = [self.create_script_record()]
table.FeatureList = otTables.FeatureList()
table.FeatureList.FeatureRecord = []
table.LookupList = otTables.LookupList()
table.LookupList.Lookup = []
gpos = ttfont['GPOS'] = newTable('GPOS')
gpos.table = table
return gpos
def parseGSUBGPOS(lines, font, tableTag):
lookupMap = None#{} Until we support forward references...
featureMap = {}
assert tableTag in ('GSUB', 'GPOS')
debug("Parsing", tableTag)
self = getattr(ot, tableTag)()
self.Version = 1.0
fields = {
'script table begin':
('ScriptList',
lambda lines: parseScriptList (lines, featureMap)),
'feature table begin':
('FeaturetList',
lambda lines: parseFeatureList (lines, lookupMap, featureMap)),
'lookup':
('LookupList',
None),
}
for attr,parser in fields.values():
setattr(self, attr, None)
while lines.peek() is not None:
typ = lines.peek()[0].lower()
if typ not in fields:
debug ('Skipping', lines.peek())
next(lines)
continue
attr,parser = fields[typ]
if typ == 'lookup':
if self.LookupList is None:
self.LookupList = ot.LookupList()
self.LookupList.Lookup = []
_, name, _ = lines.peek()
lookup = parseLookup(lines, tableTag, font, lookupMap)
if lookupMap:
assert name not in lookupMap, "Duplicate lookup name: %s" % name
lookupMap[name] = len(self.LookupList.Lookup)
else:
assert int(name) == len(self.LookupList.Lookup), "%d %d" % (name, len(self.Lookup))
self.LookupList.Lookup.append(lookup)
else:
assert getattr(self, attr) is None, attr
setattr(self, attr, parser(lines))
if self.LookupList:
self.LookupList.LookupCount = len(self.LookupList.Lookup)
return self
def makeTable(self, tag):
table = getattr(otTables, tag, None)()
table.Version = 1.0
table.ScriptList = otTables.ScriptList()
table.ScriptList.ScriptRecord = []
table.FeatureList = otTables.FeatureList()
table.FeatureList.FeatureRecord = []
table.LookupList = otTables.LookupList()
table.LookupList.Lookup = []
for lookup in self.lookups_:
lookup.lookup_index = None
for i, lookup_builder in enumerate(self.lookups_):
if lookup_builder.table != tag:
continue
# If multiple lookup builders would build equivalent lookups,
# emit them only once. This is quadratic in the number of lookups,
# but the checks are cheap. If performance ever becomes an issue,
# we could hash the lookup content and only compare those with
# the same hash value.
equivalent_builder = None
for other_builder in self.lookups_[:i]:
if lookup_builder.equals(other_builder):
equivalent_builder = other_builder
if equivalent_builder is not None:
lookup_builder.lookup_index = equivalent_builder.lookup_index
continue
lookup_builder.lookup_index = len(table.LookupList.Lookup)
table.LookupList.Lookup.append(lookup_builder.build())
# Build a table for mapping (tag, lookup_indices) to feature_index.
# For example, ('liga', (2,3,7)) --> 23.
feature_indices = {}
required_feature_indices = {} # ('latn', 'DEU') --> 23
scripts = {} # 'latn' --> {'DEU': [23, 24]} for feature #23,24
for key, lookups in sorted(self.features_.items()):
script, lang, feature_tag = key
# l.lookup_index will be None when a lookup is not needed
# for the table under construction. For example, substitution
# rules will have no lookup_index while building GPOS tables.
lookup_indices = tuple([
l.lookup_index for l in lookups if l.lookup_index is not None
])
if len(lookup_indices) == 0:
continue
feature_key = (feature_tag, lookup_indices)
feature_index = feature_indices.get(feature_key)
if feature_index is None:
feature_index = len(table.FeatureList.FeatureRecord)
frec = otTables.FeatureRecord()
frec.FeatureTag = feature_tag
frec.Feature = otTables.Feature()
frec.Feature.FeatureParams = None
frec.Feature.LookupListIndex = lookup_indices
frec.Feature.LookupCount = len(lookup_indices)
table.FeatureList.FeatureRecord.append(frec)
feature_indices[feature_key] = feature_index
scripts.setdefault(script, {}).setdefault(lang,
[]).append(feature_index)
if self.required_features_.get((script, lang)) == feature_tag:
required_feature_indices[(script, lang)] = feature_index
# Build ScriptList.
for script, lang_features in sorted(scripts.items()):
srec = otTables.ScriptRecord()
srec.ScriptTag = script
srec.Script = otTables.Script()
srec.Script.DefaultLangSys = None
srec.Script.LangSysRecord = []
for lang, feature_indices in sorted(lang_features.items()):
langrec = otTables.LangSysRecord()
langrec.LangSys = otTables.LangSys()
langrec.LangSys.LookupOrder = None
req_feature_index = \
required_feature_indices.get((script, lang))
if req_feature_index is None:
langrec.LangSys.ReqFeatureIndex = 0xFFFF
else:
langrec.LangSys.ReqFeatureIndex = req_feature_index
langrec.LangSys.FeatureIndex = [
i for i in feature_indices if i != req_feature_index
]
langrec.LangSys.FeatureCount = \
len(langrec.LangSys.FeatureIndex)
if lang == "dflt":
srec.Script.DefaultLangSys = langrec.LangSys
else:
langrec.LangSysTag = lang
srec.Script.LangSysRecord.append(langrec)
srec.Script.LangSysCount = len(srec.Script.LangSysRecord)
table.ScriptList.ScriptRecord.append(srec)
table.ScriptList.ScriptCount = len(table.ScriptList.ScriptRecord)
table.FeatureList.FeatureCount = len(table.FeatureList.FeatureRecord)
table.LookupList.LookupCount = len(table.LookupList.Lookup)
return table
parser.add_argument('infont', help='Input font file')
parser.add_argument('outfont', help='Output font file')
parser.add_argument('-s','--script',default='DFLT', help='Script tag to generate [DFLT]')
parser.add_argument('-t','--type',default='both', help='Table to create: gpos, gsub, [both]')
args = parser.parse_args()
inf = ttLib.TTFont(args.infont)
for tag in ('GSUB', 'GPOS') :
if tag.lower() == args.type or args.type == 'both' :
table = ttLib.getTableClass(tag)()
t = getattr(otTables, tag, None)()
t.Version = 1.0
t.ScriptList = otTables.ScriptList()
t.ScriptList.ScriptRecord = []
t.FeatureList = otTables.FeatureList()
t.FeatureList.FeatureRecord = []
t.LookupList = otTables.LookupList()
t.LookupList.Lookup = []
srec = otTables.ScriptRecord()
srec.ScriptTag = args.script
srec.Script = otTables.Script()
srec.Script.DefaultLangSys = None
srec.Script.LangSysRecord = []
t.ScriptList.ScriptRecord.append(srec)
t.ScriptList.ScriptCount = 1
t.FeatureList.FeatureCount = 0
t.LookupList.LookupCount = 0
table.table = t
inf[tag] = table
inf.save(args.outfont)
def makeTable(self, tag):
table = getattr(otTables, tag, None)()
table.Version = 1.0
table.ScriptList = otTables.ScriptList()
table.ScriptList.ScriptRecord = []
table.FeatureList = otTables.FeatureList()
table.FeatureList.FeatureRecord = []
table.LookupList = otTables.LookupList()
table.LookupList.Lookup = self.buildLookups_(tag)
# Build a table for mapping (tag, lookup_indices) to feature_index.
# For example, ('liga', (2,3,7)) --> 23.
feature_indices = {}
required_feature_indices = {} # ('latn', 'DEU') --> 23
scripts = {} # 'latn' --> {'DEU': [23, 24]} for feature #23,24
for key, lookups in sorted(self.features_.items()):
script, lang, feature_tag = key
# l.lookup_index will be None when a lookup is not needed
# for the table under construction. For example, substitution
# rules will have no lookup_index while building GPOS tables.
lookup_indices = tuple([l.lookup_index for l in lookups
if l.lookup_index is not None])
if len(lookup_indices) == 0:
continue
feature_key = (feature_tag, lookup_indices)
feature_index = feature_indices.get(feature_key)
if feature_index is None:
feature_index = len(table.FeatureList.FeatureRecord)
frec = otTables.FeatureRecord()
frec.FeatureTag = feature_tag
frec.Feature = otTables.Feature()
frec.Feature.FeatureParams = None
frec.Feature.LookupListIndex = lookup_indices
frec.Feature.LookupCount = len(lookup_indices)
table.FeatureList.FeatureRecord.append(frec)
feature_indices[feature_key] = feature_index
scripts.setdefault(script, {}).setdefault(lang, []).append(
feature_index)
if self.required_features_.get((script, lang)) == feature_tag:
required_feature_indices[(script, lang)] = feature_index
# Build ScriptList.
for script, lang_features in sorted(scripts.items()):
srec = otTables.ScriptRecord()
srec.ScriptTag = script
srec.Script = otTables.Script()
srec.Script.DefaultLangSys = None
srec.Script.LangSysRecord = []
for lang, feature_indices in sorted(lang_features.items()):
langrec = otTables.LangSysRecord()
langrec.LangSys = otTables.LangSys()
langrec.LangSys.LookupOrder = None
req_feature_index = \
required_feature_indices.get((script, lang))
if req_feature_index is None:
langrec.LangSys.ReqFeatureIndex = 0xFFFF
else:
langrec.LangSys.ReqFeatureIndex = req_feature_index
langrec.LangSys.FeatureIndex = [i for i in feature_indices
if i != req_feature_index]
langrec.LangSys.FeatureCount = \
len(langrec.LangSys.FeatureIndex)
if lang == "dflt":
srec.Script.DefaultLangSys = langrec.LangSys
else:
langrec.LangSysTag = lang
srec.Script.LangSysRecord.append(langrec)
srec.Script.LangSysCount = len(srec.Script.LangSysRecord)
table.ScriptList.ScriptRecord.append(srec)
table.ScriptList.ScriptCount = len(table.ScriptList.ScriptRecord)
table.FeatureList.FeatureCount = len(table.FeatureList.FeatureRecord)
table.LookupList.LookupCount = len(table.LookupList.Lookup)
return table
