otTables.py revision ea82d6dfd194f6ff6dfc7a65e7d9a0f9d671d827
1d4d151390d1288f8d2df30f6dfa26a309c7334dajvr"""fontTools.ttLib.tables.otTables -- A collection of classes representing the various 2d4d151390d1288f8d2df30f6dfa26a309c7334dajvrOpenType subtables. 3d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 464b5c80e80444a124da335e8d4d208bffcf2737bjvrMost are constructed upon import from data in otData.py, all are populated with 564b5c80e80444a124da335e8d4d208bffcf2737bjvrconverter objects from otConverters.py. 6d4d151390d1288f8d2df30f6dfa26a309c7334dajvr""" 732c10eecffb4923e0721c395e4b80fb732543f18Behdad Esfahbodfrom __future__ import print_function, division 830e691edd056ba22fa8970280e986747817bec3dBehdad Esfahbodfrom fontTools.misc.py23 import * 92b06aaa2a6bcd363c25fb0c43f6bb906906594bdBehdad Esfahbodfrom .otBase import BaseTable, FormatSwitchingBaseTable 1030e691edd056ba22fa8970280e986747817bec3dBehdad Esfahbodimport operator 116e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbodimport warnings 12d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 13d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 14d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass LookupOrder(BaseTable): 15d4d151390d1288f8d2df30f6dfa26a309c7334dajvr """Dummy class; this table isn't defined, but is used, and is always NULL.""" 16d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 17d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass FeatureParams(BaseTable): 189e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 199e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod def compile(self, writer, font): 209e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod assert featureParamTypes.get(writer['FeatureTag'], None) == self.__class__, "Wrong FeatureParams type for feature '%s': %s" % (writer['FeatureTag'], self.__class__.__name__) 219e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod BaseTable.compile(self, writer, font) 229e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 23d76fa68785bc843ad83e2901ada96f2a5b02397dBehdad Esfahbod def toXML(self, xmlWriter, font, attrs=None, name=None): 24d76fa68785bc843ad83e2901ada96f2a5b02397dBehdad Esfahbod BaseTable.toXML(self, xmlWriter, font, attrs, name=self.__class__.__name__) 25d76fa68785bc843ad83e2901ada96f2a5b02397dBehdad Esfahbod 269e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbodclass FeatureParamsSize(FeatureParams): 279e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod pass 289e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 299e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbodclass FeatureParamsStylisticSet(FeatureParams): 309e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod pass 319e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 329e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbodclass FeatureParamsCharacterVariants(FeatureParams): 339e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod pass 34d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 35d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvrclass Coverage(FormatSwitchingBaseTable): 36d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 37d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr # manual implementation to get rid of glyphID dependencies 38d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 391a53beb7b4bb252dc002dcdc2de70517d4727494jvr def postRead(self, rawTable, font): 40d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr if self.Format == 1: 4143f6e363475caee9df35d52f536d6de4cf2d443bBehdad Esfahbod # TODO only allow glyphs that are valid? 421a53beb7b4bb252dc002dcdc2de70517d4727494jvr self.glyphs = rawTable["GlyphArray"] 43d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr elif self.Format == 2: 44d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs = self.glyphs = [] 451a53beb7b4bb252dc002dcdc2de70517d4727494jvr ranges = rawTable["RangeRecord"] 46183afe6408fade5d45dd45d062293c416a4adef1Behdad Esfahbod glyphOrder = font.getGlyphOrder() 4717700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod # Some SIL fonts have coverage entries that don't have sorted 4817700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod # StartCoverageIndex. If it is so, fixup and warn. We undo 4917700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod # this when writing font out. 50b7fd2e19138b177403689bdd6989cfd2402aa2b3Behdad Esfahbod sorted_ranges = sorted(ranges, key=lambda a: a.StartCoverageIndex) 5117700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod if ranges != sorted_ranges: 5217700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod warnings.warn("GSUB/GPOS Coverage is not sorted by glyph ids.") 5317700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod ranges = sorted_ranges 5417700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod del sorted_ranges 55d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr for r in ranges: 56d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr assert r.StartCoverageIndex == len(glyphs), \ 57d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr (r.StartCoverageIndex, len(glyphs)) 58d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr start = r.Start 59d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr end = r.End 606e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod try: 61dc87372c88dfd3bb4418c4113d9301102324359eBehdad Esfahbod startID = font.getGlyphID(start, requireReal=True) 626e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod except KeyError: 636e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod warnings.warn("Coverage table has start glyph ID out of range: %s." % start) 646e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod continue 656e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod try: 6643f6e363475caee9df35d52f536d6de4cf2d443bBehdad Esfahbod endID = font.getGlyphID(end, requireReal=True) + 1 676e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod except KeyError: 68650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # Apparently some tools use 65535 to "match all" the range 69650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod if end != 'glyph65535': 70650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod warnings.warn("Coverage table has end glyph ID out of range: %s." % end) 71650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # NOTE: We clobber out-of-range things here. There are legit uses for those, 72650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # but none that we have seen in the wild. 736e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod endID = len(glyphOrder) 7443f6e363475caee9df35d52f536d6de4cf2d443bBehdad Esfahbod glyphs.extend(glyphOrder[glyphID] for glyphID in range(startID, endID)) 75d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr else: 761a53beb7b4bb252dc002dcdc2de70517d4727494jvr assert 0, "unknown format: %s" % self.Format 77d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 78d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr def preWrite(self, font): 7931ae380735dbf75a460df002a7fc2bcd81e28153jvr glyphs = getattr(self, "glyphs", None) 80257fba71729b4552a73f296b8fbd5b6224cdcabbjvr if glyphs is None: 81257fba71729b4552a73f296b8fbd5b6224cdcabbjvr glyphs = self.glyphs = [] 82d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr format = 1 83a138467da399c071dbd78682938642b8e8d8a4cejvr rawTable = {"GlyphArray": glyphs} 84823f8cd15f16bb9dc3991c2672f16dd90579711bjvr getGlyphID = font.getGlyphID 85a138467da399c071dbd78682938642b8e8d8a4cejvr if glyphs: 861a53beb7b4bb252dc002dcdc2de70517d4727494jvr # find out whether Format 2 is more compact or not 87823f8cd15f16bb9dc3991c2672f16dd90579711bjvr glyphIDs = [getGlyphID(glyphName) for glyphName in glyphs ] 8817700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod brokenOrder = sorted(glyphIDs) != glyphIDs 89d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 90d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr last = glyphIDs[0] 91d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges = [[last]] 92d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr for glyphID in glyphIDs[1:]: 93a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr if glyphID != last + 1: 94d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges[-1].append(last) 95d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges.append([glyphID]) 96d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr last = glyphID 97d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges[-1].append(last) 98d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 9917700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod if brokenOrder or len(ranges) * 3 < len(glyphs): # 3 words vs. 1 word 100d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr # Format 2 is more compact 101d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr index = 0 102d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr for i in range(len(ranges)): 103d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr start, end = ranges[i] 104d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r = RangeRecord() 10517700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod r.StartID = start 106d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r.Start = font.getGlyphName(start) 107d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r.End = font.getGlyphName(end) 108d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r.StartCoverageIndex = index 109d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges[i] = r 110d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr index = index + end - start + 1 11117700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod if brokenOrder: 11217700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod warnings.warn("GSUB/GPOS Coverage is not sorted by glyph ids.") 113b7fd2e19138b177403689bdd6989cfd2402aa2b3Behdad Esfahbod ranges.sort(key=lambda a: a.StartID) 11417700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod for r in ranges: 11517700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod del r.StartID 116d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr format = 2 1171a53beb7b4bb252dc002dcdc2de70517d4727494jvr rawTable = {"RangeRecord": ranges} 118d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr #else: 119d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr # fallthrough; Format 1 is more compact 120d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr self.Format = format 1211a53beb7b4bb252dc002dcdc2de70517d4727494jvr return rawTable 122d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 123d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr def toXML2(self, xmlWriter, font): 124a138467da399c071dbd78682938642b8e8d8a4cejvr for glyphName in getattr(self, "glyphs", []): 125d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr xmlWriter.simpletag("Glyph", value=glyphName) 126d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr xmlWriter.newline() 127d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 1283a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 129d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs = getattr(self, "glyphs", None) 130d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr if glyphs is None: 131d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs = [] 132d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr self.glyphs = glyphs 133d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs.append(attrs["value"]) 134d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 135d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 136823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef doModulo(value): 137823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if value < 0: 138823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return value + 65536 139823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return value 140823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 1411d6360af4c553a7b26447b0e1e96f7b701c9325ejvrclass SingleSubst(FormatSwitchingBaseTable): 1421d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 1431d6360af4c553a7b26447b0e1e96f7b701c9325ejvr def postRead(self, rawTable, font): 1441d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping = {} 1451fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr input = _getGlyphsFromCoverageTable(rawTable["Coverage"]) 146823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lenMapping = len(input) 1471d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if self.Format == 1: 1481d6360af4c553a7b26447b0e1e96f7b701c9325ejvr delta = rawTable["DeltaGlyphID"] 149823f8cd15f16bb9dc3991c2672f16dd90579711bjvr inputGIDS = [ font.getGlyphID(name) for name in input ] 150823f8cd15f16bb9dc3991c2672f16dd90579711bjvr outGIDS = [ glyphID + delta for glyphID in inputGIDS ] 151e5ca79699d00fdf7ac6eaceaed372aea8d6bc1fdBehdad Esfahbod outGIDS = map(doModulo, outGIDS) 152823f8cd15f16bb9dc3991c2672f16dd90579711bjvr outNames = [ font.getGlyphName(glyphID) for glyphID in outGIDS ] 153e5ca79699d00fdf7ac6eaceaed372aea8d6bc1fdBehdad Esfahbod list(map(operator.setitem, [mapping]*lenMapping, input, outNames)) 1541d6360af4c553a7b26447b0e1e96f7b701c9325ejvr elif self.Format == 2: 1551d6360af4c553a7b26447b0e1e96f7b701c9325ejvr assert len(input) == rawTable["GlyphCount"], \ 1561d6360af4c553a7b26447b0e1e96f7b701c9325ejvr "invalid SingleSubstFormat2 table" 1571d6360af4c553a7b26447b0e1e96f7b701c9325ejvr subst = rawTable["Substitute"] 158e5ca79699d00fdf7ac6eaceaed372aea8d6bc1fdBehdad Esfahbod list(map(operator.setitem, [mapping]*lenMapping, input, subst)) 1591d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1601d6360af4c553a7b26447b0e1e96f7b701c9325ejvr assert 0, "unknown format: %s" % self.Format 1611d6360af4c553a7b26447b0e1e96f7b701c9325ejvr self.mapping = mapping 1621d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 1631d6360af4c553a7b26447b0e1e96f7b701c9325ejvr def preWrite(self, font): 16431ae380735dbf75a460df002a7fc2bcd81e28153jvr mapping = getattr(self, "mapping", None) 16531ae380735dbf75a460df002a7fc2bcd81e28153jvr if mapping is None: 16631ae380735dbf75a460df002a7fc2bcd81e28153jvr mapping = self.mapping = {} 167c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(mapping.items()) 168823f8cd15f16bb9dc3991c2672f16dd90579711bjvr getGlyphID = font.getGlyphID 169e06166b83aa82582dab2e011520b1a77f72aa9f9Behdad Esfahbod gidItems = [(getGlyphID(a), getGlyphID(b)) for a,b in items] 170ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod sortableItems = sorted(zip(gidItems, items)) 171823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 172823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # figure out format 1731d6360af4c553a7b26447b0e1e96f7b701c9325ejvr format = 2 1741d6360af4c553a7b26447b0e1e96f7b701c9325ejvr delta = None 175823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for inID, outID in gidItems: 1761d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if delta is None: 1771d6360af4c553a7b26447b0e1e96f7b701c9325ejvr delta = outID - inID 178e06166b83aa82582dab2e011520b1a77f72aa9f9Behdad Esfahbod if delta < -32768: 179e06166b83aa82582dab2e011520b1a77f72aa9f9Behdad Esfahbod delta += 65536 180e06166b83aa82582dab2e011520b1a77f72aa9f9Behdad Esfahbod elif delta > 32767: 181e06166b83aa82582dab2e011520b1a77f72aa9f9Behdad Esfahbod delta -= 65536 1821d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1831d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if delta != outID - inID: 1841d6360af4c553a7b26447b0e1e96f7b701c9325ejvr break 1851d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1861d6360af4c553a7b26447b0e1e96f7b701c9325ejvr format = 1 187823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 1881d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable = {} 1891d6360af4c553a7b26447b0e1e96f7b701c9325ejvr self.Format = format 1901d6360af4c553a7b26447b0e1e96f7b701c9325ejvr cov = Coverage() 191823f8cd15f16bb9dc3991c2672f16dd90579711bjvr input = [ item [1][0] for item in sortableItems] 192823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subst = [ item [1][1] for item in sortableItems] 193823f8cd15f16bb9dc3991c2672f16dd90579711bjvr cov.glyphs = input 1941d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable["Coverage"] = cov 1951d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if format == 1: 1961d6360af4c553a7b26447b0e1e96f7b701c9325ejvr assert delta is not None 1971d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable["DeltaGlyphID"] = delta 1981d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1991d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable["Substitute"] = subst 2001d6360af4c553a7b26447b0e1e96f7b701c9325ejvr return rawTable 2011d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 2021d6360af4c553a7b26447b0e1e96f7b701c9325ejvr def toXML2(self, xmlWriter, font): 203ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.mapping.items()) 2041d6360af4c553a7b26447b0e1e96f7b701c9325ejvr for inGlyph, outGlyph in items: 2051d6360af4c553a7b26447b0e1e96f7b701c9325ejvr xmlWriter.simpletag("Substitution", 2061d6360af4c553a7b26447b0e1e96f7b701c9325ejvr [("in", inGlyph), ("out", outGlyph)]) 2071d6360af4c553a7b26447b0e1e96f7b701c9325ejvr xmlWriter.newline() 2081d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 2093a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 2101d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping = getattr(self, "mapping", None) 2111d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if mapping is None: 2121d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping = {} 2131d6360af4c553a7b26447b0e1e96f7b701c9325ejvr self.mapping = mapping 2141d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping[attrs["in"]] = attrs["out"] 2151d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 2161d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 217a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvrclass ClassDef(FormatSwitchingBaseTable): 218a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 219a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr def postRead(self, rawTable, font): 220a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs = {} 22163b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod glyphOrder = font.getGlyphOrder() 222823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 223a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr if self.Format == 1: 224a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr start = rawTable["StartGlyph"] 225823f8cd15f16bb9dc3991c2672f16dd90579711bjvr classList = rawTable["ClassValueArray"] 22663b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod try: 22763b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod startID = font.getGlyphID(start, requireReal=True) 22863b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod except KeyError: 22963b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod warnings.warn("ClassDef table has start glyph ID out of range: %s." % start) 23063b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod startID = len(glyphOrder) 23163b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod endID = startID + len(classList) 23263b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod if endID > len(glyphOrder): 23363b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod warnings.warn("ClassDef table has entries for out of range glyph IDs: %s,%s." % (start, len(classList))) 234650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # NOTE: We clobber out-of-range things here. There are legit uses for those, 235650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # but none that we have seen in the wild. 23663b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod endID = len(glyphOrder) 237823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 23863b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod for glyphID, cls in zip(range(startID, endID), classList): 23963b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod classDefs[glyphOrder[glyphID]] = cls 240823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 241a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr elif self.Format == 2: 242a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr records = rawTable["ClassRangeRecord"] 243a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr for rec in records: 244a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr start = rec.Start 245a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr end = rec.End 246a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr cls = rec.Class 24763b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod try: 24863b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod startID = font.getGlyphID(start, requireReal=True) 24963b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod except KeyError: 25063b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod warnings.warn("ClassDef table has start glyph ID out of range: %s." % start) 25163b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod continue 25263b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod try: 253b23b4cefda2acf417bfecf2135357554dbd32277Behdad Esfahbod endID = font.getGlyphID(end, requireReal=True) + 1 25463b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod except KeyError: 255650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # Apparently some tools use 65535 to "match all" the range 256650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod if end != 'glyph65535': 257650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod warnings.warn("ClassDef table has end glyph ID out of range: %s." % end) 258650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # NOTE: We clobber out-of-range things here. There are legit uses for those, 259650a38fffc19e23426816994bf059441a8853341Behdad Esfahbod # but none that we have seen in the wild. 26063b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod endID = len(glyphOrder) 26163b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod for glyphID in range(startID, endID): 26263b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod classDefs[glyphOrder[glyphID]] = cls 263a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr else: 264a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr assert 0, "unknown format: %s" % self.Format 265a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr self.classDefs = classDefs 266a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 267a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr def preWrite(self, font): 26831ae380735dbf75a460df002a7fc2bcd81e28153jvr classDefs = getattr(self, "classDefs", None) 26931ae380735dbf75a460df002a7fc2bcd81e28153jvr if classDefs is None: 27031ae380735dbf75a460df002a7fc2bcd81e28153jvr classDefs = self.classDefs = {} 271c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(classDefs.items()) 27283e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod format = 2 27383e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rawTable = {"ClassRangeRecord": []} 274823f8cd15f16bb9dc3991c2672f16dd90579711bjvr getGlyphID = font.getGlyphID 275a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr for i in range(len(items)): 276a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr glyphName, cls = items[i] 277823f8cd15f16bb9dc3991c2672f16dd90579711bjvr items[i] = getGlyphID(glyphName), glyphName, cls 278a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr items.sort() 27931ae380735dbf75a460df002a7fc2bcd81e28153jvr if items: 28031ae380735dbf75a460df002a7fc2bcd81e28153jvr last, lastName, lastCls = items[0] 28183e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges = [[lastCls, last, lastName]] 28231ae380735dbf75a460df002a7fc2bcd81e28153jvr for glyphID, glyphName, cls in items[1:]: 28331ae380735dbf75a460df002a7fc2bcd81e28153jvr if glyphID != last + 1 or cls != lastCls: 28483e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges[-1].extend([last, lastName]) 28583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges.append([cls, glyphID, glyphName]) 28631ae380735dbf75a460df002a7fc2bcd81e28153jvr last = glyphID 28731ae380735dbf75a460df002a7fc2bcd81e28153jvr lastName = glyphName 28831ae380735dbf75a460df002a7fc2bcd81e28153jvr lastCls = cls 28983e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges[-1].extend([last, lastName]) 29083e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod 29183e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod startGlyph = ranges[0][1] 29283e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod endGlyph = ranges[-1][3] 29383e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod glyphCount = endGlyph - startGlyph + 1 29483e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod if len(ranges) * 3 < glyphCount + 1: 29583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod # Format 2 is more compact 29683e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod for i in range(len(ranges)): 29783e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod cls, start, startName, end, endName = ranges[i] 29883e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec = ClassRangeRecord() 29983e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec.Start = startName 30083e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec.End = endName 30183e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec.Class = cls 30283e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges[i] = rec 30383e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod format = 2 30483e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rawTable = {"ClassRangeRecord": ranges} 30583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod else: 30683e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod # Format 1 is more compact 30783e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod startGlyphName = ranges[0][2] 30883e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod classes = [0] * glyphCount 30983e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod for cls, start, startName, end, endName in ranges: 31083e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod for g in range(start - startGlyph, end - startGlyph + 1): 31183e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod classes[g] = cls 31283e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod format = 1 31383e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rawTable = {"StartGlyph": startGlyphName, "ClassValueArray": classes} 31483e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod self.Format = format 31583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod return rawTable 316a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 317a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr def toXML2(self, xmlWriter, font): 318ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.classDefs.items()) 319a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr for glyphName, cls in items: 320a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr xmlWriter.simpletag("ClassDef", [("glyph", glyphName), ("class", cls)]) 321a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr xmlWriter.newline() 322a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 3233a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 324a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs = getattr(self, "classDefs", None) 325a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr if classDefs is None: 326a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs = {} 327a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr self.classDefs = classDefs 328a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs[attrs["glyph"]] = int(attrs["class"]) 329a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 330a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 331b2486125e9438443a1419706c50958ab0676eb5ajvrclass AlternateSubst(FormatSwitchingBaseTable): 332b2486125e9438443a1419706c50958ab0676eb5ajvr 333b2486125e9438443a1419706c50958ab0676eb5ajvr def postRead(self, rawTable, font): 334b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = {} 335b2486125e9438443a1419706c50958ab0676eb5ajvr if self.Format == 1: 3361fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr input = _getGlyphsFromCoverageTable(rawTable["Coverage"]) 337b2486125e9438443a1419706c50958ab0676eb5ajvr alts = rawTable["AlternateSet"] 338823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if len(input) != len(alts): 339823f8cd15f16bb9dc3991c2672f16dd90579711bjvr assert len(input) == len(alts) 340b2486125e9438443a1419706c50958ab0676eb5ajvr for i in range(len(input)): 341b2486125e9438443a1419706c50958ab0676eb5ajvr alternates[input[i]] = alts[i].Alternate 342b2486125e9438443a1419706c50958ab0676eb5ajvr else: 343b2486125e9438443a1419706c50958ab0676eb5ajvr assert 0, "unknown format: %s" % self.Format 344b2486125e9438443a1419706c50958ab0676eb5ajvr self.alternates = alternates 345b2486125e9438443a1419706c50958ab0676eb5ajvr 346b2486125e9438443a1419706c50958ab0676eb5ajvr def preWrite(self, font): 347b2486125e9438443a1419706c50958ab0676eb5ajvr self.Format = 1 34831ae380735dbf75a460df002a7fc2bcd81e28153jvr alternates = getattr(self, "alternates", None) 34931ae380735dbf75a460df002a7fc2bcd81e28153jvr if alternates is None: 35031ae380735dbf75a460df002a7fc2bcd81e28153jvr alternates = self.alternates = {} 351c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(alternates.items()) 352b2486125e9438443a1419706c50958ab0676eb5ajvr for i in range(len(items)): 353b2486125e9438443a1419706c50958ab0676eb5ajvr glyphName, set = items[i] 354b2486125e9438443a1419706c50958ab0676eb5ajvr items[i] = font.getGlyphID(glyphName), glyphName, set 355b2486125e9438443a1419706c50958ab0676eb5ajvr items.sort() 356b2486125e9438443a1419706c50958ab0676eb5ajvr cov = Coverage() 357823f8cd15f16bb9dc3991c2672f16dd90579711bjvr cov.glyphs = [ item[1] for item in items] 358b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = [] 359823f8cd15f16bb9dc3991c2672f16dd90579711bjvr setList = [ item[-1] for item in items] 360823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for set in setList: 361b2486125e9438443a1419706c50958ab0676eb5ajvr alts = AlternateSet() 362b2486125e9438443a1419706c50958ab0676eb5ajvr alts.Alternate = set 363b2486125e9438443a1419706c50958ab0676eb5ajvr alternates.append(alts) 364823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # a special case to deal with the fact that several hundred Adobe Japan1-5 365823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # CJK fonts will overflow an offset if the coverage table isn't pushed to the end. 366823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Also useful in that when splitting a sub-table because of an offset overflow 367823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # I don't need to calculate the change in the subtable offset due to the change in the coverage table size. 368823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Allows packing more rules in subtable. 369823f8cd15f16bb9dc3991c2672f16dd90579711bjvr self.sortCoverageLast = 1 370b2486125e9438443a1419706c50958ab0676eb5ajvr return {"Coverage": cov, "AlternateSet": alternates} 371b2486125e9438443a1419706c50958ab0676eb5ajvr 372b2486125e9438443a1419706c50958ab0676eb5ajvr def toXML2(self, xmlWriter, font): 373ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.alternates.items()) 374b2486125e9438443a1419706c50958ab0676eb5ajvr for glyphName, alternates in items: 375b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.begintag("AlternateSet", glyph=glyphName) 376b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.newline() 377b2486125e9438443a1419706c50958ab0676eb5ajvr for alt in alternates: 378b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.simpletag("Alternate", glyph=alt) 379b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.newline() 380b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.endtag("AlternateSet") 381b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.newline() 382b2486125e9438443a1419706c50958ab0676eb5ajvr 3833a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 384b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = getattr(self, "alternates", None) 385b2486125e9438443a1419706c50958ab0676eb5ajvr if alternates is None: 386b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = {} 387b2486125e9438443a1419706c50958ab0676eb5ajvr self.alternates = alternates 388b2486125e9438443a1419706c50958ab0676eb5ajvr glyphName = attrs["glyph"] 389b2486125e9438443a1419706c50958ab0676eb5ajvr set = [] 390b2486125e9438443a1419706c50958ab0676eb5ajvr alternates[glyphName] = set 391b2486125e9438443a1419706c50958ab0676eb5ajvr for element in content: 392b774f9f684c5a0f91f5fa177c9a461968789123fBehdad Esfahbod if not isinstance(element, tuple): 393b2486125e9438443a1419706c50958ab0676eb5ajvr continue 394b2486125e9438443a1419706c50958ab0676eb5ajvr name, attrs, content = element 395b2486125e9438443a1419706c50958ab0676eb5ajvr set.append(attrs["glyph"]) 396b2486125e9438443a1419706c50958ab0676eb5ajvr 397b2486125e9438443a1419706c50958ab0676eb5ajvr 398f2164abef39af7cfef989352fadfca628ed077b2jvrclass LigatureSubst(FormatSwitchingBaseTable): 399f2164abef39af7cfef989352fadfca628ed077b2jvr 400f2164abef39af7cfef989352fadfca628ed077b2jvr def postRead(self, rawTable, font): 401f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures = {} 402f2164abef39af7cfef989352fadfca628ed077b2jvr if self.Format == 1: 403ea82d6dfd194f6ff6dfc7a65e7d9a0f9d671d827Behdad Esfahbod input = _getGlyphsFromCoverageTable(rawTable["Coverage"]) 404f2164abef39af7cfef989352fadfca628ed077b2jvr ligSets = rawTable["LigatureSet"] 405f2164abef39af7cfef989352fadfca628ed077b2jvr assert len(input) == len(ligSets) 406f2164abef39af7cfef989352fadfca628ed077b2jvr for i in range(len(input)): 407f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures[input[i]] = ligSets[i].Ligature 408f2164abef39af7cfef989352fadfca628ed077b2jvr else: 409f2164abef39af7cfef989352fadfca628ed077b2jvr assert 0, "unknown format: %s" % self.Format 410f2164abef39af7cfef989352fadfca628ed077b2jvr self.ligatures = ligatures 411f2164abef39af7cfef989352fadfca628ed077b2jvr 412f2164abef39af7cfef989352fadfca628ed077b2jvr def preWrite(self, font): 41331ae380735dbf75a460df002a7fc2bcd81e28153jvr ligatures = getattr(self, "ligatures", None) 41431ae380735dbf75a460df002a7fc2bcd81e28153jvr if ligatures is None: 41531ae380735dbf75a460df002a7fc2bcd81e28153jvr ligatures = self.ligatures = {} 416c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(ligatures.items()) 417f2164abef39af7cfef989352fadfca628ed077b2jvr for i in range(len(items)): 418f2164abef39af7cfef989352fadfca628ed077b2jvr glyphName, set = items[i] 419f2164abef39af7cfef989352fadfca628ed077b2jvr items[i] = font.getGlyphID(glyphName), glyphName, set 420f2164abef39af7cfef989352fadfca628ed077b2jvr items.sort() 421f2164abef39af7cfef989352fadfca628ed077b2jvr cov = Coverage() 422823f8cd15f16bb9dc3991c2672f16dd90579711bjvr cov.glyphs = [ item[1] for item in items] 423823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 424f2164abef39af7cfef989352fadfca628ed077b2jvr ligSets = [] 425823f8cd15f16bb9dc3991c2672f16dd90579711bjvr setList = [ item[-1] for item in items ] 426823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for set in setList: 427f2164abef39af7cfef989352fadfca628ed077b2jvr ligSet = LigatureSet() 428f2164abef39af7cfef989352fadfca628ed077b2jvr ligs = ligSet.Ligature = [] 429f2164abef39af7cfef989352fadfca628ed077b2jvr for lig in set: 430f2164abef39af7cfef989352fadfca628ed077b2jvr ligs.append(lig) 431f2164abef39af7cfef989352fadfca628ed077b2jvr ligSets.append(ligSet) 432823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Useful in that when splitting a sub-table because of an offset overflow 433823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # I don't need to calculate the change in subtabl offset due to the coverage table size. 434823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Allows packing more rules in subtable. 435823f8cd15f16bb9dc3991c2672f16dd90579711bjvr self.sortCoverageLast = 1 436f2164abef39af7cfef989352fadfca628ed077b2jvr return {"Coverage": cov, "LigatureSet": ligSets} 437f2164abef39af7cfef989352fadfca628ed077b2jvr 438f2164abef39af7cfef989352fadfca628ed077b2jvr def toXML2(self, xmlWriter, font): 439ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.ligatures.items()) 440f2164abef39af7cfef989352fadfca628ed077b2jvr for glyphName, ligSets in items: 441f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.begintag("LigatureSet", glyph=glyphName) 442f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.newline() 443f2164abef39af7cfef989352fadfca628ed077b2jvr for lig in ligSets: 444f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.simpletag("Ligature", glyph=lig.LigGlyph, 445f2164abef39af7cfef989352fadfca628ed077b2jvr components=",".join(lig.Component)) 446f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.newline() 447f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.endtag("LigatureSet") 448f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.newline() 449f2164abef39af7cfef989352fadfca628ed077b2jvr 4503a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 451f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures = getattr(self, "ligatures", None) 452f2164abef39af7cfef989352fadfca628ed077b2jvr if ligatures is None: 453f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures = {} 454f2164abef39af7cfef989352fadfca628ed077b2jvr self.ligatures = ligatures 455f2164abef39af7cfef989352fadfca628ed077b2jvr glyphName = attrs["glyph"] 456f2164abef39af7cfef989352fadfca628ed077b2jvr ligs = [] 457f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures[glyphName] = ligs 458f2164abef39af7cfef989352fadfca628ed077b2jvr for element in content: 459b774f9f684c5a0f91f5fa177c9a461968789123fBehdad Esfahbod if not isinstance(element, tuple): 460f2164abef39af7cfef989352fadfca628ed077b2jvr continue 461f2164abef39af7cfef989352fadfca628ed077b2jvr name, attrs, content = element 462f2164abef39af7cfef989352fadfca628ed077b2jvr lig = Ligature() 463f2164abef39af7cfef989352fadfca628ed077b2jvr lig.LigGlyph = attrs["glyph"] 464f2164abef39af7cfef989352fadfca628ed077b2jvr lig.Component = attrs["components"].split(",") 465f2164abef39af7cfef989352fadfca628ed077b2jvr ligs.append(lig) 466f2164abef39af7cfef989352fadfca628ed077b2jvr 467f2164abef39af7cfef989352fadfca628ed077b2jvr 46864b5c80e80444a124da335e8d4d208bffcf2737bjvr# 46964b5c80e80444a124da335e8d4d208bffcf2737bjvr# For each subtable format there is a class. However, we don't really distinguish 47064b5c80e80444a124da335e8d4d208bffcf2737bjvr# between "field name" and "format name": often these are the same. Yet there's 47164b5c80e80444a124da335e8d4d208bffcf2737bjvr# a whole bunch of fields with different names. The following dict is a mapping 47264b5c80e80444a124da335e8d4d208bffcf2737bjvr# from "format name" to "field name". _buildClasses() uses this to create a 47364b5c80e80444a124da335e8d4d208bffcf2737bjvr# subclass for each alternate field name. 47464b5c80e80444a124da335e8d4d208bffcf2737bjvr# 47564b5c80e80444a124da335e8d4d208bffcf2737bjvr_equivalents = { 47664b5c80e80444a124da335e8d4d208bffcf2737bjvr 'MarkArray': ("Mark1Array",), 47764b5c80e80444a124da335e8d4d208bffcf2737bjvr 'LangSys': ('DefaultLangSys',), 47864b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Coverage': ('MarkCoverage', 'BaseCoverage', 'LigatureCoverage', 'Mark1Coverage', 479d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 'Mark2Coverage', 'BacktrackCoverage', 'InputCoverage', 480f952a22af7b59862d49ee2947932f4baab37a5edBehdad Esfahbod 'LookAheadCoverage', 'VertGlyphCoverage', 'HorizGlyphCoverage', 481f952a22af7b59862d49ee2947932f4baab37a5edBehdad Esfahbod 'TopAccentCoverage', 'ExtendedShapeCoverage', 'MathKernCoverage'), 48264b5c80e80444a124da335e8d4d208bffcf2737bjvr 'ClassDef': ('ClassDef1', 'ClassDef2', 'BacktrackClassDef', 'InputClassDef', 48327f108844ef1aeeb5c694a8304bf6c4944783d42jvr 'LookAheadClassDef', 'GlyphClassDef', 'MarkAttachClassDef'), 48464b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Anchor': ('EntryAnchor', 'ExitAnchor', 'BaseAnchor', 'LigatureAnchor', 48564b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Mark2Anchor', 'MarkAnchor'), 48664b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Device': ('XPlaDevice', 'YPlaDevice', 'XAdvDevice', 'YAdvDevice', 48764b5c80e80444a124da335e8d4d208bffcf2737bjvr 'XDeviceTable', 'YDeviceTable', 'DeviceTable'), 48864b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Axis': ('HorizAxis', 'VertAxis',), 48964b5c80e80444a124da335e8d4d208bffcf2737bjvr 'MinMax': ('DefaultMinMax',), 49064b5c80e80444a124da335e8d4d208bffcf2737bjvr 'BaseCoord': ('MinCoord', 'MaxCoord',), 49164b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfLangSys': ('DefJstfLangSys',), 49264b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfGSUBModList': ('ShrinkageEnableGSUB', 'ShrinkageDisableGSUB', 'ExtensionEnableGSUB', 49364b5c80e80444a124da335e8d4d208bffcf2737bjvr 'ExtensionDisableGSUB',), 49464b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfGPOSModList': ('ShrinkageEnableGPOS', 'ShrinkageDisableGPOS', 'ExtensionEnableGPOS', 49564b5c80e80444a124da335e8d4d208bffcf2737bjvr 'ExtensionDisableGPOS',), 49664b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfMax': ('ShrinkageJstfMax', 'ExtensionJstfMax',), 497f952a22af7b59862d49ee2947932f4baab37a5edBehdad Esfahbod 'MathKern': ('TopRightMathKern', 'TopLeftMathKern', 'BottomRightMathKern', 498f952a22af7b59862d49ee2947932f4baab37a5edBehdad Esfahbod 'BottomLeftMathKern'), 499f952a22af7b59862d49ee2947932f4baab37a5edBehdad Esfahbod 'MathGlyphConstruction': ('VertGlyphConstruction', 'HorizGlyphConstruction'), 50064b5c80e80444a124da335e8d4d208bffcf2737bjvr} 501d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 502e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# 503e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# OverFlow logic, to automatically create ExtensionLookups 504e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# XXX This should probably move to otBase.py 505e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# 506d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 507823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef fixLookupOverFlows(ttf, overflowRecord): 508823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ Either the offset from the LookupList to a lookup overflowed, or 509823f8cd15f16bb9dc3991c2672f16dd90579711bjvr an offset from a lookup to a subtable overflowed. 510823f8cd15f16bb9dc3991c2672f16dd90579711bjvr The table layout is: 511823f8cd15f16bb9dc3991c2672f16dd90579711bjvr GPSO/GUSB 512823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Script List 513823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Feature List 514823f8cd15f16bb9dc3991c2672f16dd90579711bjvr LookUpList 515823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Lookup[0] and contents 516823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable offset list 517823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[0] and contents 518823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ... 519823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[n] and contents 520823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ... 521823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Lookup[n] and contents 522823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable offset list 523823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[0] and contents 524823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ... 525823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[n] and contents 5269e6ef94b5554c5b7dda2de9c863c11ed4b996b7aBehdad Esfahbod If the offset to a lookup overflowed (SubTableIndex is None) 527823f8cd15f16bb9dc3991c2672f16dd90579711bjvr we must promote the *previous* lookup to an Extension type. 528823f8cd15f16bb9dc3991c2672f16dd90579711bjvr If the offset from a lookup to subtable overflowed, then we must promote it 529823f8cd15f16bb9dc3991c2672f16dd90579711bjvr to an Extension Lookup type. 530823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ 531823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 0 532823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookupIndex = overflowRecord.LookupListIndex 5339e6ef94b5554c5b7dda2de9c863c11ed4b996b7aBehdad Esfahbod if (overflowRecord.SubTableIndex is None): 534823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookupIndex = lookupIndex - 1 535823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if lookupIndex < 0: 536823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 537823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if overflowRecord.tableType == 'GSUB': 538823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extType = 7 539823f8cd15f16bb9dc3991c2672f16dd90579711bjvr elif overflowRecord.tableType == 'GPOS': 540823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extType = 9 541823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 542823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookups = ttf[overflowRecord.tableType].table.LookupList.Lookup 543823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup = lookups[lookupIndex] 544823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # If the previous lookup is an extType, look further back. Very unlikely, but possible. 545823f8cd15f16bb9dc3991c2672f16dd90579711bjvr while lookup.LookupType == extType: 546823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookupIndex = lookupIndex -1 547823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if lookupIndex < 0: 548823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 549823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup = lookups[lookupIndex] 550823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 551823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for si in range(len(lookup.SubTable)): 552823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subTable = lookup.SubTable[si] 553823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTableClass = lookupTypes[overflowRecord.tableType][extType] 554823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable = extSubTableClass() 555823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable.Format = 1 556823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable.ExtensionLookupType = lookup.LookupType 557823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable.ExtSubTable = subTable 558823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTable[si] = extSubTable 559823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.LookupType = extType 560823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 1 561823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 562823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 563823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef splitAlternateSubst(oldSubTable, newSubTable, overflowRecord): 564823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 1 565823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.Format = oldSubTable.Format 566823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if hasattr(oldSubTable, 'sortCoverageLast'): 567823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.sortCoverageLast = oldSubTable.sortCoverageLast 568823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 569ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod oldAlts = sorted(oldSubTable.alternates.items()) 570823f8cd15f16bb9dc3991c2672f16dd90579711bjvr oldLen = len(oldAlts) 571823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 572823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if overflowRecord.itemName in [ 'Coverage', 'RangeRecord']: 573823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Coverage table is written last. overflow is to or within the 574823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # the coverage table. We will just cut the subtable in half. 57532c10eecffb4923e0721c395e4b80fb732543f18Behdad Esfahbod newLen = oldLen//2 576823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 577823f8cd15f16bb9dc3991c2672f16dd90579711bjvr elif overflowRecord.itemName == 'AlternateSet': 578823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # We just need to back up by two items 579823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # from the overflowed AlternateSet index to make sure the offset 580823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # to the Coverage table doesn't overflow. 581823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newLen = overflowRecord.itemIndex - 1 582823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 583823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.alternates = {} 584823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for i in range(newLen, oldLen): 585823f8cd15f16bb9dc3991c2672f16dd90579711bjvr item = oldAlts[i] 586823f8cd15f16bb9dc3991c2672f16dd90579711bjvr key = item[0] 587823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.alternates[key] = item[1] 588823f8cd15f16bb9dc3991c2672f16dd90579711bjvr del oldSubTable.alternates[key] 589823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 590823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 591823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 592823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 593823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 594823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef splitLigatureSubst(oldSubTable, newSubTable, overflowRecord): 595823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 1 596823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.Format = oldSubTable.Format 597ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod oldLigs = sorted(oldSubTable.ligatures.items()) 598823f8cd15f16bb9dc3991c2672f16dd90579711bjvr oldLen = len(oldLigs) 599823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 600823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if overflowRecord.itemName in [ 'Coverage', 'RangeRecord']: 601823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Coverage table is written last. overflow is to or within the 602823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # the coverage table. We will just cut the subtable in half. 60332c10eecffb4923e0721c395e4b80fb732543f18Behdad Esfahbod newLen = oldLen//2 604823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 605823f8cd15f16bb9dc3991c2672f16dd90579711bjvr elif overflowRecord.itemName == 'LigatureSet': 606823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # We just need to back up by two items 607823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # from the overflowed AlternateSet index to make sure the offset 608823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # to the Coverage table doesn't overflow. 609823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newLen = overflowRecord.itemIndex - 1 610823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 611823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.ligatures = {} 612823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for i in range(newLen, oldLen): 613823f8cd15f16bb9dc3991c2672f16dd90579711bjvr item = oldLigs[i] 614823f8cd15f16bb9dc3991c2672f16dd90579711bjvr key = item[0] 615823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.ligatures[key] = item[1] 616823f8cd15f16bb9dc3991c2672f16dd90579711bjvr del oldSubTable.ligatures[key] 617823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 618823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 619823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 620823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 621823f8cd15f16bb9dc3991c2672f16dd90579711bjvrsplitTable = { 'GSUB': { 622823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 1: splitSingleSubst, 623823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 2: splitMultipleSubst, 624823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 3: splitAlternateSubst, 625823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 4: splitLigatureSubst, 626823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 5: splitContextSubst, 627823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 6: splitChainContextSubst, 628823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 7: splitExtensionSubst, 629823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 8: splitReverseChainSingleSubst, 630823f8cd15f16bb9dc3991c2672f16dd90579711bjvr }, 631823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 'GPOS': { 632823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 1: splitSinglePos, 633823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 2: splitPairPos, 634823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 3: splitCursivePos, 635823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 4: splitMarkBasePos, 636823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 5: splitMarkLigPos, 637823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 6: splitMarkMarkPos, 638823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 7: splitContextPos, 639823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 8: splitChainContextPos, 640823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 9: splitExtensionPos, 641823f8cd15f16bb9dc3991c2672f16dd90579711bjvr } 642823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 643823f8cd15f16bb9dc3991c2672f16dd90579711bjvr } 644823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 645823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef fixSubTableOverFlows(ttf, overflowRecord): 646823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ 647823f8cd15f16bb9dc3991c2672f16dd90579711bjvr An offset has overflowed within a sub-table. We need to divide this subtable into smaller parts. 648823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ 649823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 0 650823f8cd15f16bb9dc3991c2672f16dd90579711bjvr table = ttf[overflowRecord.tableType].table 651823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup = table.LookupList.Lookup[overflowRecord.LookupListIndex] 652823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subIndex = overflowRecord.SubTableIndex 653823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subtable = lookup.SubTable[subIndex] 654823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 655823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if hasattr(subtable, 'ExtSubTable'): 656823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # We split the subtable of the Extension table, and add a new Extension table 657823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # to contain the new subtable. 658823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 659823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subTableType = subtable.ExtensionLookupType 660823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable = subtable 661823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subtable = extSubTable.ExtSubTable 662823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTableClass = lookupTypes[overflowRecord.tableType][lookup.LookupType] 663823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable = newExtSubTableClass() 664823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable.Format = extSubTable.Format 665823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable.ExtensionLookupType = extSubTable.ExtensionLookupType 666823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTable.insert(subIndex + 1, newExtSubTable) 667823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 668823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTableClass = lookupTypes[overflowRecord.tableType][subTableType] 669823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable = newSubTableClass() 670823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable.ExtSubTable = newSubTable 671823f8cd15f16bb9dc3991c2672f16dd90579711bjvr else: 672823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subTableType = lookup.LookupType 673823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTableClass = lookupTypes[overflowRecord.tableType][subTableType] 674823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable = newSubTableClass() 675823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTable.insert(subIndex + 1, newSubTable) 676823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 677823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if hasattr(lookup, 'SubTableCount'): # may not be defined yet. 678823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTableCount = lookup.SubTableCount + 1 679823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 680823f8cd15f16bb9dc3991c2672f16dd90579711bjvr try: 681823f8cd15f16bb9dc3991c2672f16dd90579711bjvr splitFunc = splitTable[overflowRecord.tableType][subTableType] 682823f8cd15f16bb9dc3991c2672f16dd90579711bjvr except KeyError: 683823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 684823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 685823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = splitFunc(subtable, newSubTable, overflowRecord) 686823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 687823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 688e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# End of OverFlow logic 689823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 690823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 691d4d151390d1288f8d2df30f6dfa26a309c7334dajvrdef _buildClasses(): 692e1d97b827791a4d190fbd0ec597f602aefd09025Behdad Esfahbod import re 6932b06aaa2a6bcd363c25fb0c43f6bb906906594bdBehdad Esfahbod from .otData import otData 694d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 695d4d151390d1288f8d2df30f6dfa26a309c7334dajvr formatPat = re.compile("([A-Za-z0-9]+)Format(\d+)$") 696d4d151390d1288f8d2df30f6dfa26a309c7334dajvr namespace = globals() 697d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 698d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # populate module with classes 699d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for name, table in otData: 700d4d151390d1288f8d2df30f6dfa26a309c7334dajvr baseClass = BaseTable 701d4d151390d1288f8d2df30f6dfa26a309c7334dajvr m = formatPat.match(name) 702d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if m: 703d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # XxxFormatN subtable, we only add the "base" table 704d4d151390d1288f8d2df30f6dfa26a309c7334dajvr name = m.group(1) 705d4d151390d1288f8d2df30f6dfa26a309c7334dajvr baseClass = FormatSwitchingBaseTable 706bc5e1cb195c0bfa1c8e7507326d5a9ad05aecb4bBehdad Esfahbod if name not in namespace: 70764b5c80e80444a124da335e8d4d208bffcf2737bjvr # the class doesn't exist yet, so the base implementation is used. 708e1d97b827791a4d190fbd0ec597f602aefd09025Behdad Esfahbod cls = type(name, (baseClass,), {}) 709d4d151390d1288f8d2df30f6dfa26a309c7334dajvr namespace[name] = cls 710d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 71164b5c80e80444a124da335e8d4d208bffcf2737bjvr for base, alts in _equivalents.items(): 712d4d151390d1288f8d2df30f6dfa26a309c7334dajvr base = namespace[base] 713d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for alt in alts: 714e1d97b827791a4d190fbd0ec597f602aefd09025Behdad Esfahbod namespace[alt] = type(alt, (base,), {}) 715d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 716d4d151390d1288f8d2df30f6dfa26a309c7334dajvr global lookupTypes 717d4d151390d1288f8d2df30f6dfa26a309c7334dajvr lookupTypes = { 718d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 'GSUB': { 719d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 1: SingleSubst, 720d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 2: MultipleSubst, 721d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 3: AlternateSubst, 722d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 4: LigatureSubst, 723d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 5: ContextSubst, 724d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 6: ChainContextSubst, 725d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 7: ExtensionSubst, 7268e1d75b1a3fb4874bb78d9c34a11ba30de81a5ccjvr 8: ReverseChainSingleSubst, 727d4d151390d1288f8d2df30f6dfa26a309c7334dajvr }, 728d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 'GPOS': { 729d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 1: SinglePos, 730d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 2: PairPos, 731d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 3: CursivePos, 732d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 4: MarkBasePos, 733d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 5: MarkLigPos, 734d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 6: MarkMarkPos, 735d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 7: ContextPos, 736d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 8: ChainContextPos, 737d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 9: ExtensionPos, 738d4d151390d1288f8d2df30f6dfa26a309c7334dajvr }, 739d4d151390d1288f8d2df30f6dfa26a309c7334dajvr } 740d4d151390d1288f8d2df30f6dfa26a309c7334dajvr lookupTypes['JSTF'] = lookupTypes['GPOS'] # JSTF contains GPOS 74164b5c80e80444a124da335e8d4d208bffcf2737bjvr for lookupEnum in lookupTypes.values(): 74264b5c80e80444a124da335e8d4d208bffcf2737bjvr for enum, cls in lookupEnum.items(): 74364b5c80e80444a124da335e8d4d208bffcf2737bjvr cls.LookupType = enum 7449e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 7459e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod global featureParamTypes 7469e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod featureParamTypes = { 7479e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 'size': FeatureParamsSize, 7489e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod } 7499e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod for i in range(1, 20+1): 7509e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod featureParamTypes['ss%02d' % i] = FeatureParamsStylisticSet 7519e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod for i in range(1, 99+1): 7529e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod featureParamTypes['cv%02d' % i] = FeatureParamsCharacterVariants 753d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 754d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # add converters to classes 7552b06aaa2a6bcd363c25fb0c43f6bb906906594bdBehdad Esfahbod from .otConverters import buildConverters 756d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for name, table in otData: 757d4d151390d1288f8d2df30f6dfa26a309c7334dajvr m = formatPat.match(name) 758d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if m: 759d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # XxxFormatN subtable, add converter to "base" table 760d4d151390d1288f8d2df30f6dfa26a309c7334dajvr name, format = m.groups() 761d4d151390d1288f8d2df30f6dfa26a309c7334dajvr format = int(format) 762d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls = namespace[name] 763d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if not hasattr(cls, "converters"): 764d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.converters = {} 765d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.convertersByName = {} 76664b5c80e80444a124da335e8d4d208bffcf2737bjvr converters, convertersByName = buildConverters(table[1:], namespace) 767d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.converters[format] = converters 768d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.convertersByName[format] = convertersByName 769d4d151390d1288f8d2df30f6dfa26a309c7334dajvr else: 770d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls = namespace[name] 77164b5c80e80444a124da335e8d4d208bffcf2737bjvr cls.converters, cls.convertersByName = buildConverters(table, namespace) 772d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 773d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 774d4d151390d1288f8d2df30f6dfa26a309c7334dajvr_buildClasses() 7751fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr 7761fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr 7771fae9b48d3a275c6e1dc0649c40ae121dfc4098djvrdef _getGlyphsFromCoverageTable(coverage): 7781fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr if coverage is None: 7791fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr # empty coverage table 7801fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr return [] 7811fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr else: 7821fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr return coverage.glyphs 783