def buildFeatureRecord(featureTag, lookupListIndices):
"""Build a FeatureRecord."""
fr = ot.FeatureRecord()
fr.FeatureTag = featureTag
fr.Feature = ot.Feature()
fr.Feature.LookupListIndex = lookupListIndices
return fr
def parseFeatureList(lines, lookupMap=None, featureMap=None):
self = ot.FeatureList()
self.FeatureRecord = []
with lines.between('feature table'):
for line in lines:
name, featureTag, lookups = line
if featureMap is not None:
assert name not in featureMap, "Duplicate feature name: %s" % name
featureMap[name] = len(self.FeatureRecord)
# If feature name is integer, make sure it matches its index.
try:
assert int(name) == len(self.FeatureRecord), "%d %d" % (name, len(self.FeatureRecord))
except ValueError:
pass
featureRec = ot.FeatureRecord()
featureRec.FeatureTag = featureTag
featureRec.Feature = ot.Feature()
self.FeatureRecord.append(featureRec)
feature = featureRec.Feature
feature.FeatureParams = None
syms = stripSplitComma(lookups)
feature.LookupListIndex = theList = [None] * len(syms)
for i,sym in enumerate(syms):
setReference(mapLookup, lookupMap, sym, setitem, theList, i)
feature.LookupCount = len(feature.LookupListIndex)
self.FeatureCount = len(self.FeatureRecord)
return self
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 _add_feature(self, font: Font, table: otTables.GPOS, feature_tag: str,
lookup_indices: List[int]) -> None:
logger.debug('Adding "%s" to: "%s" %s', feature_tag, font,
self._to_str(glyph_ids=True))
assert not Font._has_ottable_feature(table, feature_tag)
features = table.FeatureList.FeatureRecord
feature_index = len(features)
logger.info('Adding Feature "%s" at index %d for lookup %s',
feature_tag, feature_index, lookup_indices)
feature_record = otTables.FeatureRecord()
feature_record.FeatureTag = feature_tag
feature_record.Feature = otTables.Feature()
feature_record.Feature.LookupListIndex = lookup_indices
feature_record.Feature.LookupCount = len(lookup_indices)
features.append(feature_record)
scripts = table.ScriptList.ScriptRecord
for script_record in scripts:
default_lang_sys = script_record.Script.DefaultLangSys
if default_lang_sys:
logger.debug(
"Adding Feature index %d to script '%s' DefaultLangSys",
feature_index, script_record.ScriptTag)
default_lang_sys.FeatureIndex.append(feature_index)
for lang_sys in script_record.Script.LangSysRecord:
logger.debug(
"Adding Feature index %d to script '%s' LangSys '%s'",
feature_index, script_record.ScriptTag,
lang_sys.LangSysTag)
lang_sys.LangSys.FeatureIndex.append(feature_index)
def buildFeatureRecord(featureTag, lookupListIndices):
"""Build a FeatureRecord."""
fr = ot.FeatureRecord()
fr.FeatureTag = featureTag
fr.Feature = ot.Feature()
fr.Feature.LookupListIndex = lookupListIndices
fr.Feature.populateDefaults()
return fr
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" % (i + 1)
lookupMap = dict((id(v), v) for v in table.table.LookupList.Lookup)
featureMap = dict(
(id(v), v) for v in table.table.FeatureList.FeatureRecord)
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
]:
feature = [
featureMap[v] for v in langsys.FeatureIndex
if featureMap[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(id(synthFeature))
featureMap[id(synthFeature)] = synthFeature
langsys.FeatureIndex.sort(
key=lambda v: featureMap[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]
table.table.LookupList.Lookup.append(synthLookup)
table.table.LookupList.LookupCount += 1
feature.Feature.LookupListIndex[:0] = [id(synthLookup)]
feature.Feature.LookupCount += 1
DefaultTable.merge(self, m, tables)
return self
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
if table is None or table is NotImplemented:
# Checks whether the dups are equivalent or not.
# Discard gid if its shape is not equal to that of oldgid.
for oldgid, gid in dups.items():
if not isGlyphSame(m.fonts, oldgid, gid):
oldgname, oldidx = getGlyphNameAndFontIndex(oldgid)
gname, idx = getGlyphNameAndFontIndex(gid)
log.warn("%s:<%s> is dropped and replaced by %s:<%s>" % (m.fontfiles[idx], gname, m.fontfiles[oldidx], oldgname))
continue
lookupMap = {id(v):v for v in table.table.LookupList.Lookup}
featureMap = {id(v):v for v in table.table.FeatureList.FeatureRecord}
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 = [featureMap[v] for v in langsys.FeatureIndex if featureMap[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(id(synthFeature))
featureMap[id(synthFeature)] = synthFeature
langsys.FeatureIndex.sort(key=lambda v: featureMap[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]
table.table.LookupList.Lookup.append(synthLookup)
table.table.LookupList.LookupCount += 1
feature.Feature.LookupListIndex[:0] = [id(synthLookup)]
feature.Feature.LookupCount += 1
DefaultTable.merge(self, m, tables)
return self
def create_feature_list(feature_tag, lookup_count):
"""Create a FeatureList for the GSUB table."""
feature_record = otTables.FeatureRecord()
feature_record.FeatureTag = feature_tag
feature_record.Feature = otTables.Feature()
feature_record.Feature.LookupCount = lookup_count
feature_record.Feature.LookupListIndex = range(lookup_count)
feature_record.Feature.FeatureParams = None
feature_list = otTables.FeatureList()
feature_list.FeatureCount = 1
feature_list.FeatureRecord = [feature_record]
return feature_list
def mergeFeatureLists(lst):
d = {}
for l in lst:
for f in l:
tag = f.FeatureTag
if tag not in d:
d[tag] = []
d[tag].append(f.Feature)
ret = []
for tag in sorted(d.keys()):
rec = otTables.FeatureRecord()
rec.FeatureTag = tag
rec.Feature = mergeFeatures(d[tag])
ret.append(rec)
return ret
featureRecords = table.FeatureList.FeatureRecord
for script in table.ScriptList.ScriptRecord:
print(" Script:", script.ScriptTag)
if not script.Script:
print(" Null script.")
continue
languages = list(script.Script.LangSysRecord)
if script.Script.DefaultLangSys:
defaultlangsys = otTables.LangSysRecord()
defaultlangsys.LangSysTag = "default"
defaultlangsys.LangSys = script.Script.DefaultLangSys
languages.insert(0, defaultlangsys)
for langsys in languages:
print(" Language:", langsys.LangSysTag)
if not langsys.LangSys:
print(" Null language.")
continue
features = [
featureRecords[index] for index in langsys.LangSys.FeatureIndex
]
if langsys.LangSys.ReqFeatureIndex != 0xFFFF:
record = featureRecords[langsys.LangSys.ReqFeatureIndex]
requiredfeature = otTables.FeatureRecord()
requiredfeature.FeatureTag = 'required(%s)' % record.FeatureTag
requiredfeature.Feature = record.Feature
features.insert(0, requiredfeature)
for feature in features:
print(" Feature:", feature.FeatureTag)
lookups = feature.Feature.LookupListIndex
print(" Lookups:", ','.join(str(l) for l in lookups))
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
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