Traktor/myenv/Lib/site-packages/fontTools/merge/layout.py

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2024-05-23 01:57:24 +02:00
# Copyright 2013 Google, Inc. All Rights Reserved.
#
# Google Author(s): Behdad Esfahbod, Roozbeh Pournader
from fontTools import ttLib
from fontTools.ttLib.tables.DefaultTable import DefaultTable
from fontTools.ttLib.tables import otTables
from fontTools.merge.base import add_method, mergeObjects
from fontTools.merge.util import *
import logging
log = logging.getLogger("fontTools.merge")
def mergeLookupLists(lst):
# TODO Do smarter merge.
return sumLists(lst)
def mergeFeatures(lst):
assert lst
self = otTables.Feature()
self.FeatureParams = None
self.LookupListIndex = mergeLookupLists(
[l.LookupListIndex for l in lst if l.LookupListIndex]
)
self.LookupCount = len(self.LookupListIndex)
return self
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
def mergeLangSyses(lst):
assert lst
# TODO Support merging ReqFeatureIndex
assert all(l.ReqFeatureIndex == 0xFFFF for l in lst)
self = otTables.LangSys()
self.LookupOrder = None
self.ReqFeatureIndex = 0xFFFF
self.FeatureIndex = mergeFeatureLists(
[l.FeatureIndex for l in lst if l.FeatureIndex]
)
self.FeatureCount = len(self.FeatureIndex)
return self
def mergeScripts(lst):
assert lst
if len(lst) == 1:
return lst[0]
langSyses = {}
for sr in lst:
for lsr in sr.LangSysRecord:
if lsr.LangSysTag not in langSyses:
langSyses[lsr.LangSysTag] = []
langSyses[lsr.LangSysTag].append(lsr.LangSys)
lsrecords = []
for tag, langSys_list in sorted(langSyses.items()):
lsr = otTables.LangSysRecord()
lsr.LangSys = mergeLangSyses(langSys_list)
lsr.LangSysTag = tag
lsrecords.append(lsr)
self = otTables.Script()
self.LangSysRecord = lsrecords
self.LangSysCount = len(lsrecords)
dfltLangSyses = [s.DefaultLangSys for s in lst if s.DefaultLangSys]
if dfltLangSyses:
self.DefaultLangSys = mergeLangSyses(dfltLangSyses)
else:
self.DefaultLangSys = None
return self
def mergeScriptRecords(lst):
d = {}
for l in lst:
for s in l:
tag = s.ScriptTag
if tag not in d:
d[tag] = []
d[tag].append(s.Script)
ret = []
for tag in sorted(d.keys()):
rec = otTables.ScriptRecord()
rec.ScriptTag = tag
rec.Script = mergeScripts(d[tag])
ret.append(rec)
return ret
otTables.ScriptList.mergeMap = {
"ScriptCount": lambda lst: None, # TODO
"ScriptRecord": mergeScriptRecords,
}
otTables.BaseScriptList.mergeMap = {
"BaseScriptCount": lambda lst: None, # TODO
# TODO: Merge duplicate entries
"BaseScriptRecord": lambda lst: sorted(
sumLists(lst), key=lambda s: s.BaseScriptTag
),
}
otTables.FeatureList.mergeMap = {
"FeatureCount": sum,
"FeatureRecord": lambda lst: sorted(sumLists(lst), key=lambda s: s.FeatureTag),
}
otTables.LookupList.mergeMap = {
"LookupCount": sum,
"Lookup": sumLists,
}
otTables.Coverage.mergeMap = {
"Format": min,
"glyphs": sumLists,
}
otTables.ClassDef.mergeMap = {
"Format": min,
"classDefs": sumDicts,
}
otTables.LigCaretList.mergeMap = {
"Coverage": mergeObjects,
"LigGlyphCount": sum,
"LigGlyph": sumLists,
}
otTables.AttachList.mergeMap = {
"Coverage": mergeObjects,
"GlyphCount": sum,
"AttachPoint": sumLists,
}
# XXX Renumber MarkFilterSets of lookups
otTables.MarkGlyphSetsDef.mergeMap = {
"MarkSetTableFormat": equal,
"MarkSetCount": sum,
"Coverage": sumLists,
}
otTables.Axis.mergeMap = {
"*": mergeObjects,
}
# XXX Fix BASE table merging
otTables.BaseTagList.mergeMap = {
"BaseTagCount": sum,
"BaselineTag": sumLists,
}
otTables.GDEF.mergeMap = otTables.GSUB.mergeMap = otTables.GPOS.mergeMap = (
otTables.BASE.mergeMap
) = otTables.JSTF.mergeMap = otTables.MATH.mergeMap = {
"*": mergeObjects,
"Version": max,
}
ttLib.getTableClass("GDEF").mergeMap = ttLib.getTableClass("GSUB").mergeMap = (
ttLib.getTableClass("GPOS").mergeMap
) = ttLib.getTableClass("BASE").mergeMap = ttLib.getTableClass(
"JSTF"
).mergeMap = ttLib.getTableClass(
"MATH"
).mergeMap = {
"tableTag": onlyExisting(equal), # XXX clean me up
"table": mergeObjects,
}
@add_method(ttLib.getTableClass("GSUB"))
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:
log.warning(
"Have non-identical duplicates to resolve for '%s' but no GSUB. Are duplicates intended?: %s",
m.fonts[i]._merger__name,
dups,
)
continue
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 = []
table.table.FeatureList.FeatureRecord.append(synthFeature)
table.table.FeatureList.FeatureCount += 1
feature = synthFeature
langsys.FeatureIndex.append(feature)
langsys.FeatureIndex.sort(key=lambda v: v.FeatureTag)
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
if feature.Feature.LookupListIndex[:1] != [synthLookup]:
feature.Feature.LookupListIndex[:0] = [synthLookup]
feature.Feature.LookupCount += 1
DefaultTable.merge(self, m, tables)
return self
@add_method(
otTables.SingleSubst,
otTables.MultipleSubst,
otTables.AlternateSubst,
otTables.LigatureSubst,
otTables.ReverseChainSingleSubst,
otTables.SinglePos,
otTables.PairPos,
otTables.CursivePos,
otTables.MarkBasePos,
otTables.MarkLigPos,
otTables.MarkMarkPos,
)
def mapLookups(self, lookupMap):
pass
# Copied and trimmed down from subset.py
@add_method(
otTables.ContextSubst,
otTables.ChainContextSubst,
otTables.ContextPos,
otTables.ChainContextPos,
)
def __merge_classify_context(self):
class ContextHelper(object):
def __init__(self, klass, Format):
if klass.__name__.endswith("Subst"):
Typ = "Sub"
Type = "Subst"
else:
Typ = "Pos"
Type = "Pos"
if klass.__name__.startswith("Chain"):
Chain = "Chain"
else:
Chain = ""
ChainTyp = Chain + Typ
self.Typ = Typ
self.Type = Type
self.Chain = Chain
self.ChainTyp = ChainTyp
self.LookupRecord = Type + "LookupRecord"
if Format == 1:
self.Rule = ChainTyp + "Rule"
self.RuleSet = ChainTyp + "RuleSet"
elif Format == 2:
self.Rule = ChainTyp + "ClassRule"
self.RuleSet = ChainTyp + "ClassSet"
if self.Format not in [1, 2, 3]:
return None # Don't shoot the messenger; let it go
if not hasattr(self.__class__, "_merge__ContextHelpers"):
self.__class__._merge__ContextHelpers = {}
if self.Format not in self.__class__._merge__ContextHelpers:
helper = ContextHelper(self.__class__, self.Format)
self.__class__._merge__ContextHelpers[self.Format] = helper
return self.__class__._merge__ContextHelpers[self.Format]
@add_method(
otTables.ContextSubst,
otTables.ChainContextSubst,
otTables.ContextPos,
otTables.ChainContextPos,
)
def mapLookups(self, lookupMap):
c = self.__merge_classify_context()
if self.Format in [1, 2]:
for rs in getattr(self, c.RuleSet):
if not rs:
continue
for r in getattr(rs, c.Rule):
if not r:
continue
for ll in getattr(r, c.LookupRecord):
if not ll:
continue
ll.LookupListIndex = lookupMap[ll.LookupListIndex]
elif self.Format == 3:
for ll in getattr(self, c.LookupRecord):
if not ll:
continue
ll.LookupListIndex = lookupMap[ll.LookupListIndex]
else:
assert 0, "unknown format: %s" % self.Format
@add_method(otTables.ExtensionSubst, otTables.ExtensionPos)
def mapLookups(self, lookupMap):
if self.Format == 1:
self.ExtSubTable.mapLookups(lookupMap)
else:
assert 0, "unknown format: %s" % self.Format
@add_method(otTables.Lookup)
def mapLookups(self, lookupMap):
for st in self.SubTable:
if not st:
continue
st.mapLookups(lookupMap)
@add_method(otTables.LookupList)
def mapLookups(self, lookupMap):
for l in self.Lookup:
if not l:
continue
l.mapLookups(lookupMap)
@add_method(otTables.Lookup)
def mapMarkFilteringSets(self, markFilteringSetMap):
if self.LookupFlag & 0x0010:
self.MarkFilteringSet = markFilteringSetMap[self.MarkFilteringSet]
@add_method(otTables.LookupList)
def mapMarkFilteringSets(self, markFilteringSetMap):
for l in self.Lookup:
if not l:
continue
l.mapMarkFilteringSets(markFilteringSetMap)
@add_method(otTables.Feature)
def mapLookups(self, lookupMap):
self.LookupListIndex = [lookupMap[i] for i in self.LookupListIndex]
@add_method(otTables.FeatureList)
def mapLookups(self, lookupMap):
for f in self.FeatureRecord:
if not f or not f.Feature:
continue
f.Feature.mapLookups(lookupMap)
@add_method(otTables.DefaultLangSys, otTables.LangSys)
def mapFeatures(self, featureMap):
self.FeatureIndex = [featureMap[i] for i in self.FeatureIndex]
if self.ReqFeatureIndex != 65535:
self.ReqFeatureIndex = featureMap[self.ReqFeatureIndex]
@add_method(otTables.Script)
def mapFeatures(self, featureMap):
if self.DefaultLangSys:
self.DefaultLangSys.mapFeatures(featureMap)
for l in self.LangSysRecord:
if not l or not l.LangSys:
continue
l.LangSys.mapFeatures(featureMap)
@add_method(otTables.ScriptList)
def mapFeatures(self, featureMap):
for s in self.ScriptRecord:
if not s or not s.Script:
continue
s.Script.mapFeatures(featureMap)
def layoutPreMerge(font):
# Map indices to references
GDEF = font.get("GDEF")
GSUB = font.get("GSUB")
GPOS = font.get("GPOS")
for t in [GSUB, GPOS]:
if not t:
continue
if t.table.LookupList:
lookupMap = {i: v for i, v in enumerate(t.table.LookupList.Lookup)}
t.table.LookupList.mapLookups(lookupMap)
t.table.FeatureList.mapLookups(lookupMap)
if (
GDEF
and GDEF.table.Version >= 0x00010002
and GDEF.table.MarkGlyphSetsDef
):
markFilteringSetMap = {
i: v for i, v in enumerate(GDEF.table.MarkGlyphSetsDef.Coverage)
}
t.table.LookupList.mapMarkFilteringSets(markFilteringSetMap)
if t.table.FeatureList and t.table.ScriptList:
featureMap = {i: v for i, v in enumerate(t.table.FeatureList.FeatureRecord)}
t.table.ScriptList.mapFeatures(featureMap)
# TODO FeatureParams nameIDs
def layoutPostMerge(font):
# Map references back to indices
GDEF = font.get("GDEF")
GSUB = font.get("GSUB")
GPOS = font.get("GPOS")
for t in [GSUB, GPOS]:
if not t:
continue
if t.table.FeatureList and t.table.ScriptList:
# Collect unregistered (new) features.
featureMap = GregariousIdentityDict(t.table.FeatureList.FeatureRecord)
t.table.ScriptList.mapFeatures(featureMap)
# Record used features.
featureMap = AttendanceRecordingIdentityDict(
t.table.FeatureList.FeatureRecord
)
t.table.ScriptList.mapFeatures(featureMap)
usedIndices = featureMap.s
# Remove unused features
t.table.FeatureList.FeatureRecord = [
f
for i, f in enumerate(t.table.FeatureList.FeatureRecord)
if i in usedIndices
]
# Map back to indices.
featureMap = NonhashableDict(t.table.FeatureList.FeatureRecord)
t.table.ScriptList.mapFeatures(featureMap)
t.table.FeatureList.FeatureCount = len(t.table.FeatureList.FeatureRecord)
if t.table.LookupList:
# Collect unregistered (new) lookups.
lookupMap = GregariousIdentityDict(t.table.LookupList.Lookup)
t.table.FeatureList.mapLookups(lookupMap)
t.table.LookupList.mapLookups(lookupMap)
# Record used lookups.
lookupMap = AttendanceRecordingIdentityDict(t.table.LookupList.Lookup)
t.table.FeatureList.mapLookups(lookupMap)
t.table.LookupList.mapLookups(lookupMap)
usedIndices = lookupMap.s
# Remove unused lookups
t.table.LookupList.Lookup = [
l for i, l in enumerate(t.table.LookupList.Lookup) if i in usedIndices
]
# Map back to indices.
lookupMap = NonhashableDict(t.table.LookupList.Lookup)
t.table.FeatureList.mapLookups(lookupMap)
t.table.LookupList.mapLookups(lookupMap)
t.table.LookupList.LookupCount = len(t.table.LookupList.Lookup)
if GDEF and GDEF.table.Version >= 0x00010002:
markFilteringSetMap = NonhashableDict(
GDEF.table.MarkGlyphSetsDef.Coverage
)
t.table.LookupList.mapMarkFilteringSets(markFilteringSetMap)
# TODO FeatureParams nameIDs