otTables.py revision 43f6e363475caee9df35d52f536d6de4cf2d443b
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 239e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbodclass FeatureParamsSize(FeatureParams): 249e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod pass 259e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 269e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbodclass FeatureParamsStylisticSet(FeatureParams): 279e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod pass 289e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 299e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbodclass FeatureParamsCharacterVariants(FeatureParams): 309e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod pass 31d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 32d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvrclass Coverage(FormatSwitchingBaseTable): 33d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 34d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr # manual implementation to get rid of glyphID dependencies 35d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 361a53beb7b4bb252dc002dcdc2de70517d4727494jvr def postRead(self, rawTable, font): 37d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr if self.Format == 1: 3843f6e363475caee9df35d52f536d6de4cf2d443bBehdad Esfahbod # TODO only allow glyphs that are valid? 391a53beb7b4bb252dc002dcdc2de70517d4727494jvr self.glyphs = rawTable["GlyphArray"] 40d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr elif self.Format == 2: 41d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs = self.glyphs = [] 421a53beb7b4bb252dc002dcdc2de70517d4727494jvr ranges = rawTable["RangeRecord"] 43183afe6408fade5d45dd45d062293c416a4adef1Behdad Esfahbod glyphOrder = font.getGlyphOrder() 4417700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod # Some SIL fonts have coverage entries that don't have sorted 4517700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod # StartCoverageIndex. If it is so, fixup and warn. We undo 4617700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod # this when writing font out. 47b7fd2e19138b177403689bdd6989cfd2402aa2b3Behdad Esfahbod sorted_ranges = sorted(ranges, key=lambda a: a.StartCoverageIndex) 4817700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod if ranges != sorted_ranges: 4917700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod warnings.warn("GSUB/GPOS Coverage is not sorted by glyph ids.") 5017700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod ranges = sorted_ranges 5117700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod del sorted_ranges 52d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr for r in ranges: 53d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr assert r.StartCoverageIndex == len(glyphs), \ 54d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr (r.StartCoverageIndex, len(glyphs)) 55d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr start = r.Start 56d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr end = r.End 576e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod try: 58dc87372c88dfd3bb4418c4113d9301102324359eBehdad Esfahbod startID = font.getGlyphID(start, requireReal=True) 596e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod except KeyError: 606e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod warnings.warn("Coverage table has start glyph ID out of range: %s." % start) 616e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod continue 626e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod try: 6343f6e363475caee9df35d52f536d6de4cf2d443bBehdad Esfahbod endID = font.getGlyphID(end, requireReal=True) + 1 646e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod except KeyError: 656e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod warnings.warn("Coverage table has end glyph ID out of range: %s." % end) 666e7066765929929d8315a719aeff1c5e5a5d9e9aBehdad Esfahbod endID = len(glyphOrder) 6743f6e363475caee9df35d52f536d6de4cf2d443bBehdad Esfahbod glyphs.extend(glyphOrder[glyphID] for glyphID in range(startID, endID)) 68d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr else: 691a53beb7b4bb252dc002dcdc2de70517d4727494jvr assert 0, "unknown format: %s" % self.Format 70d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 71d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr def preWrite(self, font): 7231ae380735dbf75a460df002a7fc2bcd81e28153jvr glyphs = getattr(self, "glyphs", None) 73257fba71729b4552a73f296b8fbd5b6224cdcabbjvr if glyphs is None: 74257fba71729b4552a73f296b8fbd5b6224cdcabbjvr glyphs = self.glyphs = [] 75d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr format = 1 76a138467da399c071dbd78682938642b8e8d8a4cejvr rawTable = {"GlyphArray": glyphs} 77823f8cd15f16bb9dc3991c2672f16dd90579711bjvr getGlyphID = font.getGlyphID 78a138467da399c071dbd78682938642b8e8d8a4cejvr if glyphs: 791a53beb7b4bb252dc002dcdc2de70517d4727494jvr # find out whether Format 2 is more compact or not 80823f8cd15f16bb9dc3991c2672f16dd90579711bjvr glyphIDs = [getGlyphID(glyphName) for glyphName in glyphs ] 8117700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod brokenOrder = sorted(glyphIDs) != glyphIDs 82d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 83d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr last = glyphIDs[0] 84d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges = [[last]] 85d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr for glyphID in glyphIDs[1:]: 86a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr if glyphID != last + 1: 87d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges[-1].append(last) 88d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges.append([glyphID]) 89d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr last = glyphID 90d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges[-1].append(last) 91d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 9217700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod if brokenOrder or len(ranges) * 3 < len(glyphs): # 3 words vs. 1 word 93d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr # Format 2 is more compact 94d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr index = 0 95d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr for i in range(len(ranges)): 96d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr start, end = ranges[i] 97d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r = RangeRecord() 9817700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod r.StartID = start 99d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r.Start = font.getGlyphName(start) 100d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r.End = font.getGlyphName(end) 101d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr r.StartCoverageIndex = index 102d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr ranges[i] = r 103d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr index = index + end - start + 1 10417700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod if brokenOrder: 10517700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod warnings.warn("GSUB/GPOS Coverage is not sorted by glyph ids.") 106b7fd2e19138b177403689bdd6989cfd2402aa2b3Behdad Esfahbod ranges.sort(key=lambda a: a.StartID) 10717700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod for r in ranges: 10817700bf926645d7def1d4013b2e119d2be4ff904Behdad Esfahbod del r.StartID 109d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr format = 2 1101a53beb7b4bb252dc002dcdc2de70517d4727494jvr rawTable = {"RangeRecord": ranges} 111d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr #else: 112d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr # fallthrough; Format 1 is more compact 113d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr self.Format = format 1141a53beb7b4bb252dc002dcdc2de70517d4727494jvr return rawTable 115d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 116d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr def toXML2(self, xmlWriter, font): 117a138467da399c071dbd78682938642b8e8d8a4cejvr for glyphName in getattr(self, "glyphs", []): 118d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr xmlWriter.simpletag("Glyph", value=glyphName) 119d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr xmlWriter.newline() 120d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr 1213a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 122d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs = getattr(self, "glyphs", None) 123d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr if glyphs is None: 124d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs = [] 125d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr self.glyphs = glyphs 126d41386e7f7b950d2429fbf6d1964ba129d2bc2a6jvr glyphs.append(attrs["value"]) 127d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 128d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 129823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef doModulo(value): 130823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if value < 0: 131823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return value + 65536 132823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return value 133823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 1341d6360af4c553a7b26447b0e1e96f7b701c9325ejvrclass SingleSubst(FormatSwitchingBaseTable): 1351d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 1361d6360af4c553a7b26447b0e1e96f7b701c9325ejvr def postRead(self, rawTable, font): 1371d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping = {} 1381fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr input = _getGlyphsFromCoverageTable(rawTable["Coverage"]) 139823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lenMapping = len(input) 1401d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if self.Format == 1: 1411d6360af4c553a7b26447b0e1e96f7b701c9325ejvr delta = rawTable["DeltaGlyphID"] 142823f8cd15f16bb9dc3991c2672f16dd90579711bjvr inputGIDS = [ font.getGlyphID(name) for name in input ] 143e5ca79699d00fdf7ac6eaceaed372aea8d6bc1fdBehdad Esfahbod inputGIDS = map(doModulo, inputGIDS) 144823f8cd15f16bb9dc3991c2672f16dd90579711bjvr outGIDS = [ glyphID + delta for glyphID in inputGIDS ] 145e5ca79699d00fdf7ac6eaceaed372aea8d6bc1fdBehdad Esfahbod outGIDS = map(doModulo, outGIDS) 146823f8cd15f16bb9dc3991c2672f16dd90579711bjvr outNames = [ font.getGlyphName(glyphID) for glyphID in outGIDS ] 147e5ca79699d00fdf7ac6eaceaed372aea8d6bc1fdBehdad Esfahbod list(map(operator.setitem, [mapping]*lenMapping, input, outNames)) 1481d6360af4c553a7b26447b0e1e96f7b701c9325ejvr elif self.Format == 2: 1491d6360af4c553a7b26447b0e1e96f7b701c9325ejvr assert len(input) == rawTable["GlyphCount"], \ 1501d6360af4c553a7b26447b0e1e96f7b701c9325ejvr "invalid SingleSubstFormat2 table" 1511d6360af4c553a7b26447b0e1e96f7b701c9325ejvr subst = rawTable["Substitute"] 152e5ca79699d00fdf7ac6eaceaed372aea8d6bc1fdBehdad Esfahbod list(map(operator.setitem, [mapping]*lenMapping, input, subst)) 1531d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1541d6360af4c553a7b26447b0e1e96f7b701c9325ejvr assert 0, "unknown format: %s" % self.Format 1551d6360af4c553a7b26447b0e1e96f7b701c9325ejvr self.mapping = mapping 1561d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 1571d6360af4c553a7b26447b0e1e96f7b701c9325ejvr def preWrite(self, font): 15831ae380735dbf75a460df002a7fc2bcd81e28153jvr mapping = getattr(self, "mapping", None) 15931ae380735dbf75a460df002a7fc2bcd81e28153jvr if mapping is None: 16031ae380735dbf75a460df002a7fc2bcd81e28153jvr mapping = self.mapping = {} 161c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(mapping.items()) 162823f8cd15f16bb9dc3991c2672f16dd90579711bjvr getGlyphID = font.getGlyphID 163823f8cd15f16bb9dc3991c2672f16dd90579711bjvr gidItems = [(getGlyphID(item[0]), getGlyphID(item[1])) for item in items] 164ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod sortableItems = sorted(zip(gidItems, items)) 165823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 166823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # figure out format 1671d6360af4c553a7b26447b0e1e96f7b701c9325ejvr format = 2 1681d6360af4c553a7b26447b0e1e96f7b701c9325ejvr delta = None 169823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for inID, outID in gidItems: 1701d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if delta is None: 1711d6360af4c553a7b26447b0e1e96f7b701c9325ejvr delta = outID - inID 1721d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1731d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if delta != outID - inID: 1741d6360af4c553a7b26447b0e1e96f7b701c9325ejvr break 1751d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1761d6360af4c553a7b26447b0e1e96f7b701c9325ejvr format = 1 177823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 1781d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable = {} 1791d6360af4c553a7b26447b0e1e96f7b701c9325ejvr self.Format = format 1801d6360af4c553a7b26447b0e1e96f7b701c9325ejvr cov = Coverage() 181823f8cd15f16bb9dc3991c2672f16dd90579711bjvr input = [ item [1][0] for item in sortableItems] 182823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subst = [ item [1][1] for item in sortableItems] 183823f8cd15f16bb9dc3991c2672f16dd90579711bjvr cov.glyphs = input 1841d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable["Coverage"] = cov 1851d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if format == 1: 1861d6360af4c553a7b26447b0e1e96f7b701c9325ejvr assert delta is not None 1871d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable["DeltaGlyphID"] = delta 1881d6360af4c553a7b26447b0e1e96f7b701c9325ejvr else: 1891d6360af4c553a7b26447b0e1e96f7b701c9325ejvr rawTable["Substitute"] = subst 1901d6360af4c553a7b26447b0e1e96f7b701c9325ejvr return rawTable 1911d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 1921d6360af4c553a7b26447b0e1e96f7b701c9325ejvr def toXML2(self, xmlWriter, font): 193ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.mapping.items()) 1941d6360af4c553a7b26447b0e1e96f7b701c9325ejvr for inGlyph, outGlyph in items: 1951d6360af4c553a7b26447b0e1e96f7b701c9325ejvr xmlWriter.simpletag("Substitution", 1961d6360af4c553a7b26447b0e1e96f7b701c9325ejvr [("in", inGlyph), ("out", outGlyph)]) 1971d6360af4c553a7b26447b0e1e96f7b701c9325ejvr xmlWriter.newline() 1981d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 1993a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 2001d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping = getattr(self, "mapping", None) 2011d6360af4c553a7b26447b0e1e96f7b701c9325ejvr if mapping is None: 2021d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping = {} 2031d6360af4c553a7b26447b0e1e96f7b701c9325ejvr self.mapping = mapping 2041d6360af4c553a7b26447b0e1e96f7b701c9325ejvr mapping[attrs["in"]] = attrs["out"] 2051d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 2061d6360af4c553a7b26447b0e1e96f7b701c9325ejvr 207a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvrclass ClassDef(FormatSwitchingBaseTable): 208a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 209a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr def postRead(self, rawTable, font): 210a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs = {} 21163b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod glyphOrder = font.getGlyphOrder() 212823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 213a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr if self.Format == 1: 214a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr start = rawTable["StartGlyph"] 215823f8cd15f16bb9dc3991c2672f16dd90579711bjvr classList = rawTable["ClassValueArray"] 21663b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod try: 21763b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod startID = font.getGlyphID(start, requireReal=True) 21863b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod except KeyError: 21963b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod warnings.warn("ClassDef table has start glyph ID out of range: %s." % start) 22063b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod startID = len(glyphOrder) 22163b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod endID = startID + len(classList) 22263b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod if endID > len(glyphOrder): 22363b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod warnings.warn("ClassDef table has entries for out of range glyph IDs: %s,%s." % (start, len(classList))) 22463b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod endID = len(glyphOrder) 225823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 22663b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod for glyphID, cls in zip(range(startID, endID), classList): 22763b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod classDefs[glyphOrder[glyphID]] = cls 228823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 229a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr elif self.Format == 2: 230a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr records = rawTable["ClassRangeRecord"] 231a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr for rec in records: 232a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr start = rec.Start 233a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr end = rec.End 234a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr cls = rec.Class 23563b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod try: 23663b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod startID = font.getGlyphID(start, requireReal=True) 23763b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod except KeyError: 23863b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod warnings.warn("ClassDef table has start glyph ID out of range: %s." % start) 23963b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod continue 24063b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod try: 24163b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod endID = font.getGlyphID(end, requireReal=True) 24263b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod except KeyError: 24363b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod warnings.warn("ClassDef table has end glyph ID out of range: %s." % end) 24463b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod endID = len(glyphOrder) 24563b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod for glyphID in range(startID, endID): 24663b257e677993295ee015e02b92ff438a5e91135Behdad Esfahbod classDefs[glyphOrder[glyphID]] = cls 247a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr else: 248a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr assert 0, "unknown format: %s" % self.Format 249a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr self.classDefs = classDefs 250a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 251a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr def preWrite(self, font): 25231ae380735dbf75a460df002a7fc2bcd81e28153jvr classDefs = getattr(self, "classDefs", None) 25331ae380735dbf75a460df002a7fc2bcd81e28153jvr if classDefs is None: 25431ae380735dbf75a460df002a7fc2bcd81e28153jvr classDefs = self.classDefs = {} 255c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(classDefs.items()) 25683e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod format = 2 25783e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rawTable = {"ClassRangeRecord": []} 258823f8cd15f16bb9dc3991c2672f16dd90579711bjvr getGlyphID = font.getGlyphID 259a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr for i in range(len(items)): 260a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr glyphName, cls = items[i] 261823f8cd15f16bb9dc3991c2672f16dd90579711bjvr items[i] = getGlyphID(glyphName), glyphName, cls 262a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr items.sort() 26331ae380735dbf75a460df002a7fc2bcd81e28153jvr if items: 26431ae380735dbf75a460df002a7fc2bcd81e28153jvr last, lastName, lastCls = items[0] 26583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges = [[lastCls, last, lastName]] 26631ae380735dbf75a460df002a7fc2bcd81e28153jvr for glyphID, glyphName, cls in items[1:]: 26731ae380735dbf75a460df002a7fc2bcd81e28153jvr if glyphID != last + 1 or cls != lastCls: 26883e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges[-1].extend([last, lastName]) 26983e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges.append([cls, glyphID, glyphName]) 27031ae380735dbf75a460df002a7fc2bcd81e28153jvr last = glyphID 27131ae380735dbf75a460df002a7fc2bcd81e28153jvr lastName = glyphName 27231ae380735dbf75a460df002a7fc2bcd81e28153jvr lastCls = cls 27383e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges[-1].extend([last, lastName]) 27483e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod 27583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod startGlyph = ranges[0][1] 27683e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod endGlyph = ranges[-1][3] 27783e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod glyphCount = endGlyph - startGlyph + 1 27883e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod if len(ranges) * 3 < glyphCount + 1: 27983e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod # Format 2 is more compact 28083e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod for i in range(len(ranges)): 28183e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod cls, start, startName, end, endName = ranges[i] 28283e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec = ClassRangeRecord() 28383e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec.Start = startName 28483e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec.End = endName 28583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rec.Class = cls 28683e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod ranges[i] = rec 28783e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod format = 2 28883e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rawTable = {"ClassRangeRecord": ranges} 28983e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod else: 29083e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod # Format 1 is more compact 29183e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod startGlyphName = ranges[0][2] 29283e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod classes = [0] * glyphCount 29383e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod for cls, start, startName, end, endName in ranges: 29483e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod for g in range(start - startGlyph, end - startGlyph + 1): 29583e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod classes[g] = cls 29683e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod format = 1 29783e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod rawTable = {"StartGlyph": startGlyphName, "ClassValueArray": classes} 29883e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod self.Format = format 29983e2f34194696f76eb89c384bdddd10419b88e10Behdad Esfahbod return rawTable 300a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 301a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr def toXML2(self, xmlWriter, font): 302ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.classDefs.items()) 303a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr for glyphName, cls in items: 304a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr xmlWriter.simpletag("ClassDef", [("glyph", glyphName), ("class", cls)]) 305a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr xmlWriter.newline() 306a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 3073a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 308a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs = getattr(self, "classDefs", None) 309a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr if classDefs is None: 310a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs = {} 311a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr self.classDefs = classDefs 312a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr classDefs[attrs["glyph"]] = int(attrs["class"]) 313a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 314a1dfa2b77a0ac7cf2e7cdca25e024e31de436b1ajvr 315b2486125e9438443a1419706c50958ab0676eb5ajvrclass AlternateSubst(FormatSwitchingBaseTable): 316b2486125e9438443a1419706c50958ab0676eb5ajvr 317b2486125e9438443a1419706c50958ab0676eb5ajvr def postRead(self, rawTable, font): 318b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = {} 319b2486125e9438443a1419706c50958ab0676eb5ajvr if self.Format == 1: 3201fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr input = _getGlyphsFromCoverageTable(rawTable["Coverage"]) 321b2486125e9438443a1419706c50958ab0676eb5ajvr alts = rawTable["AlternateSet"] 322823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if len(input) != len(alts): 323823f8cd15f16bb9dc3991c2672f16dd90579711bjvr assert len(input) == len(alts) 324b2486125e9438443a1419706c50958ab0676eb5ajvr for i in range(len(input)): 325b2486125e9438443a1419706c50958ab0676eb5ajvr alternates[input[i]] = alts[i].Alternate 326b2486125e9438443a1419706c50958ab0676eb5ajvr else: 327b2486125e9438443a1419706c50958ab0676eb5ajvr assert 0, "unknown format: %s" % self.Format 328b2486125e9438443a1419706c50958ab0676eb5ajvr self.alternates = alternates 329b2486125e9438443a1419706c50958ab0676eb5ajvr 330b2486125e9438443a1419706c50958ab0676eb5ajvr def preWrite(self, font): 331b2486125e9438443a1419706c50958ab0676eb5ajvr self.Format = 1 33231ae380735dbf75a460df002a7fc2bcd81e28153jvr alternates = getattr(self, "alternates", None) 33331ae380735dbf75a460df002a7fc2bcd81e28153jvr if alternates is None: 33431ae380735dbf75a460df002a7fc2bcd81e28153jvr alternates = self.alternates = {} 335c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(alternates.items()) 336b2486125e9438443a1419706c50958ab0676eb5ajvr for i in range(len(items)): 337b2486125e9438443a1419706c50958ab0676eb5ajvr glyphName, set = items[i] 338b2486125e9438443a1419706c50958ab0676eb5ajvr items[i] = font.getGlyphID(glyphName), glyphName, set 339b2486125e9438443a1419706c50958ab0676eb5ajvr items.sort() 340b2486125e9438443a1419706c50958ab0676eb5ajvr cov = Coverage() 341823f8cd15f16bb9dc3991c2672f16dd90579711bjvr cov.glyphs = [ item[1] for item in items] 342b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = [] 343823f8cd15f16bb9dc3991c2672f16dd90579711bjvr setList = [ item[-1] for item in items] 344823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for set in setList: 345b2486125e9438443a1419706c50958ab0676eb5ajvr alts = AlternateSet() 346b2486125e9438443a1419706c50958ab0676eb5ajvr alts.Alternate = set 347b2486125e9438443a1419706c50958ab0676eb5ajvr alternates.append(alts) 348823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # a special case to deal with the fact that several hundred Adobe Japan1-5 349823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # CJK fonts will overflow an offset if the coverage table isn't pushed to the end. 350823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Also useful in that when splitting a sub-table because of an offset overflow 351823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # I don't need to calculate the change in the subtable offset due to the change in the coverage table size. 352823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Allows packing more rules in subtable. 353823f8cd15f16bb9dc3991c2672f16dd90579711bjvr self.sortCoverageLast = 1 354b2486125e9438443a1419706c50958ab0676eb5ajvr return {"Coverage": cov, "AlternateSet": alternates} 355b2486125e9438443a1419706c50958ab0676eb5ajvr 356b2486125e9438443a1419706c50958ab0676eb5ajvr def toXML2(self, xmlWriter, font): 357ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.alternates.items()) 358b2486125e9438443a1419706c50958ab0676eb5ajvr for glyphName, alternates in items: 359b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.begintag("AlternateSet", glyph=glyphName) 360b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.newline() 361b2486125e9438443a1419706c50958ab0676eb5ajvr for alt in alternates: 362b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.simpletag("Alternate", glyph=alt) 363b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.newline() 364b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.endtag("AlternateSet") 365b2486125e9438443a1419706c50958ab0676eb5ajvr xmlWriter.newline() 366b2486125e9438443a1419706c50958ab0676eb5ajvr 3673a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 368b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = getattr(self, "alternates", None) 369b2486125e9438443a1419706c50958ab0676eb5ajvr if alternates is None: 370b2486125e9438443a1419706c50958ab0676eb5ajvr alternates = {} 371b2486125e9438443a1419706c50958ab0676eb5ajvr self.alternates = alternates 372b2486125e9438443a1419706c50958ab0676eb5ajvr glyphName = attrs["glyph"] 373b2486125e9438443a1419706c50958ab0676eb5ajvr set = [] 374b2486125e9438443a1419706c50958ab0676eb5ajvr alternates[glyphName] = set 375b2486125e9438443a1419706c50958ab0676eb5ajvr for element in content: 376b774f9f684c5a0f91f5fa177c9a461968789123fBehdad Esfahbod if not isinstance(element, tuple): 377b2486125e9438443a1419706c50958ab0676eb5ajvr continue 378b2486125e9438443a1419706c50958ab0676eb5ajvr name, attrs, content = element 379b2486125e9438443a1419706c50958ab0676eb5ajvr set.append(attrs["glyph"]) 380b2486125e9438443a1419706c50958ab0676eb5ajvr 381b2486125e9438443a1419706c50958ab0676eb5ajvr 382f2164abef39af7cfef989352fadfca628ed077b2jvrclass LigatureSubst(FormatSwitchingBaseTable): 383f2164abef39af7cfef989352fadfca628ed077b2jvr 384f2164abef39af7cfef989352fadfca628ed077b2jvr def postRead(self, rawTable, font): 385f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures = {} 386f2164abef39af7cfef989352fadfca628ed077b2jvr if self.Format == 1: 387823f8cd15f16bb9dc3991c2672f16dd90579711bjvr input = rawTable["Coverage"].glyphs 388f2164abef39af7cfef989352fadfca628ed077b2jvr ligSets = rawTable["LigatureSet"] 389f2164abef39af7cfef989352fadfca628ed077b2jvr assert len(input) == len(ligSets) 390f2164abef39af7cfef989352fadfca628ed077b2jvr for i in range(len(input)): 391f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures[input[i]] = ligSets[i].Ligature 392f2164abef39af7cfef989352fadfca628ed077b2jvr else: 393f2164abef39af7cfef989352fadfca628ed077b2jvr assert 0, "unknown format: %s" % self.Format 394f2164abef39af7cfef989352fadfca628ed077b2jvr self.ligatures = ligatures 395f2164abef39af7cfef989352fadfca628ed077b2jvr 396f2164abef39af7cfef989352fadfca628ed077b2jvr def preWrite(self, font): 39731ae380735dbf75a460df002a7fc2bcd81e28153jvr ligatures = getattr(self, "ligatures", None) 39831ae380735dbf75a460df002a7fc2bcd81e28153jvr if ligatures is None: 39931ae380735dbf75a460df002a7fc2bcd81e28153jvr ligatures = self.ligatures = {} 400c2297cd41d6c00b95f857b65bc9fd4b57559ac5eBehdad Esfahbod items = list(ligatures.items()) 401f2164abef39af7cfef989352fadfca628ed077b2jvr for i in range(len(items)): 402f2164abef39af7cfef989352fadfca628ed077b2jvr glyphName, set = items[i] 403f2164abef39af7cfef989352fadfca628ed077b2jvr items[i] = font.getGlyphID(glyphName), glyphName, set 404f2164abef39af7cfef989352fadfca628ed077b2jvr items.sort() 405f2164abef39af7cfef989352fadfca628ed077b2jvr cov = Coverage() 406823f8cd15f16bb9dc3991c2672f16dd90579711bjvr cov.glyphs = [ item[1] for item in items] 407823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 408f2164abef39af7cfef989352fadfca628ed077b2jvr ligSets = [] 409823f8cd15f16bb9dc3991c2672f16dd90579711bjvr setList = [ item[-1] for item in items ] 410823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for set in setList: 411f2164abef39af7cfef989352fadfca628ed077b2jvr ligSet = LigatureSet() 412f2164abef39af7cfef989352fadfca628ed077b2jvr ligs = ligSet.Ligature = [] 413f2164abef39af7cfef989352fadfca628ed077b2jvr for lig in set: 414f2164abef39af7cfef989352fadfca628ed077b2jvr ligs.append(lig) 415f2164abef39af7cfef989352fadfca628ed077b2jvr ligSets.append(ligSet) 416823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Useful in that when splitting a sub-table because of an offset overflow 417823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # I don't need to calculate the change in subtabl offset due to the coverage table size. 418823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Allows packing more rules in subtable. 419823f8cd15f16bb9dc3991c2672f16dd90579711bjvr self.sortCoverageLast = 1 420f2164abef39af7cfef989352fadfca628ed077b2jvr return {"Coverage": cov, "LigatureSet": ligSets} 421f2164abef39af7cfef989352fadfca628ed077b2jvr 422f2164abef39af7cfef989352fadfca628ed077b2jvr def toXML2(self, xmlWriter, font): 423ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod items = sorted(self.ligatures.items()) 424f2164abef39af7cfef989352fadfca628ed077b2jvr for glyphName, ligSets in items: 425f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.begintag("LigatureSet", glyph=glyphName) 426f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.newline() 427f2164abef39af7cfef989352fadfca628ed077b2jvr for lig in ligSets: 428f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.simpletag("Ligature", glyph=lig.LigGlyph, 429f2164abef39af7cfef989352fadfca628ed077b2jvr components=",".join(lig.Component)) 430f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.newline() 431f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.endtag("LigatureSet") 432f2164abef39af7cfef989352fadfca628ed077b2jvr xmlWriter.newline() 433f2164abef39af7cfef989352fadfca628ed077b2jvr 4343a9fd301808f5a8991ca9ac44028d1ecb22d307fBehdad Esfahbod def fromXML(self, name, attrs, content, font): 435f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures = getattr(self, "ligatures", None) 436f2164abef39af7cfef989352fadfca628ed077b2jvr if ligatures is None: 437f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures = {} 438f2164abef39af7cfef989352fadfca628ed077b2jvr self.ligatures = ligatures 439f2164abef39af7cfef989352fadfca628ed077b2jvr glyphName = attrs["glyph"] 440f2164abef39af7cfef989352fadfca628ed077b2jvr ligs = [] 441f2164abef39af7cfef989352fadfca628ed077b2jvr ligatures[glyphName] = ligs 442f2164abef39af7cfef989352fadfca628ed077b2jvr for element in content: 443b774f9f684c5a0f91f5fa177c9a461968789123fBehdad Esfahbod if not isinstance(element, tuple): 444f2164abef39af7cfef989352fadfca628ed077b2jvr continue 445f2164abef39af7cfef989352fadfca628ed077b2jvr name, attrs, content = element 446f2164abef39af7cfef989352fadfca628ed077b2jvr lig = Ligature() 447f2164abef39af7cfef989352fadfca628ed077b2jvr lig.LigGlyph = attrs["glyph"] 448f2164abef39af7cfef989352fadfca628ed077b2jvr lig.Component = attrs["components"].split(",") 449f2164abef39af7cfef989352fadfca628ed077b2jvr ligs.append(lig) 450f2164abef39af7cfef989352fadfca628ed077b2jvr 451f2164abef39af7cfef989352fadfca628ed077b2jvr 45264b5c80e80444a124da335e8d4d208bffcf2737bjvr# 45364b5c80e80444a124da335e8d4d208bffcf2737bjvr# For each subtable format there is a class. However, we don't really distinguish 45464b5c80e80444a124da335e8d4d208bffcf2737bjvr# between "field name" and "format name": often these are the same. Yet there's 45564b5c80e80444a124da335e8d4d208bffcf2737bjvr# a whole bunch of fields with different names. The following dict is a mapping 45664b5c80e80444a124da335e8d4d208bffcf2737bjvr# from "format name" to "field name". _buildClasses() uses this to create a 45764b5c80e80444a124da335e8d4d208bffcf2737bjvr# subclass for each alternate field name. 45864b5c80e80444a124da335e8d4d208bffcf2737bjvr# 45964b5c80e80444a124da335e8d4d208bffcf2737bjvr_equivalents = { 46064b5c80e80444a124da335e8d4d208bffcf2737bjvr 'MarkArray': ("Mark1Array",), 46164b5c80e80444a124da335e8d4d208bffcf2737bjvr 'LangSys': ('DefaultLangSys',), 46264b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Coverage': ('MarkCoverage', 'BaseCoverage', 'LigatureCoverage', 'Mark1Coverage', 463d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 'Mark2Coverage', 'BacktrackCoverage', 'InputCoverage', 46427f108844ef1aeeb5c694a8304bf6c4944783d42jvr 'LookAheadCoverage'), 46564b5c80e80444a124da335e8d4d208bffcf2737bjvr 'ClassDef': ('ClassDef1', 'ClassDef2', 'BacktrackClassDef', 'InputClassDef', 46627f108844ef1aeeb5c694a8304bf6c4944783d42jvr 'LookAheadClassDef', 'GlyphClassDef', 'MarkAttachClassDef'), 46764b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Anchor': ('EntryAnchor', 'ExitAnchor', 'BaseAnchor', 'LigatureAnchor', 46864b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Mark2Anchor', 'MarkAnchor'), 46964b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Device': ('XPlaDevice', 'YPlaDevice', 'XAdvDevice', 'YAdvDevice', 47064b5c80e80444a124da335e8d4d208bffcf2737bjvr 'XDeviceTable', 'YDeviceTable', 'DeviceTable'), 47164b5c80e80444a124da335e8d4d208bffcf2737bjvr 'Axis': ('HorizAxis', 'VertAxis',), 47264b5c80e80444a124da335e8d4d208bffcf2737bjvr 'MinMax': ('DefaultMinMax',), 47364b5c80e80444a124da335e8d4d208bffcf2737bjvr 'BaseCoord': ('MinCoord', 'MaxCoord',), 47464b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfLangSys': ('DefJstfLangSys',), 47564b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfGSUBModList': ('ShrinkageEnableGSUB', 'ShrinkageDisableGSUB', 'ExtensionEnableGSUB', 47664b5c80e80444a124da335e8d4d208bffcf2737bjvr 'ExtensionDisableGSUB',), 47764b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfGPOSModList': ('ShrinkageEnableGPOS', 'ShrinkageDisableGPOS', 'ExtensionEnableGPOS', 47864b5c80e80444a124da335e8d4d208bffcf2737bjvr 'ExtensionDisableGPOS',), 47964b5c80e80444a124da335e8d4d208bffcf2737bjvr 'JstfMax': ('ShrinkageJstfMax', 'ExtensionJstfMax',), 48064b5c80e80444a124da335e8d4d208bffcf2737bjvr} 481d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 482e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# 483e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# OverFlow logic, to automatically create ExtensionLookups 484e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# XXX This should probably move to otBase.py 485e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# 486d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 487823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef fixLookupOverFlows(ttf, overflowRecord): 488823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ Either the offset from the LookupList to a lookup overflowed, or 489823f8cd15f16bb9dc3991c2672f16dd90579711bjvr an offset from a lookup to a subtable overflowed. 490823f8cd15f16bb9dc3991c2672f16dd90579711bjvr The table layout is: 491823f8cd15f16bb9dc3991c2672f16dd90579711bjvr GPSO/GUSB 492823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Script List 493823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Feature List 494823f8cd15f16bb9dc3991c2672f16dd90579711bjvr LookUpList 495823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Lookup[0] and contents 496823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable offset list 497823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[0] and contents 498823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ... 499823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[n] and contents 500823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ... 501823f8cd15f16bb9dc3991c2672f16dd90579711bjvr Lookup[n] and contents 502823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable offset list 503823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[0] and contents 504823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ... 505823f8cd15f16bb9dc3991c2672f16dd90579711bjvr SubTable[n] and contents 5069e6ef94b5554c5b7dda2de9c863c11ed4b996b7aBehdad Esfahbod If the offset to a lookup overflowed (SubTableIndex is None) 507823f8cd15f16bb9dc3991c2672f16dd90579711bjvr we must promote the *previous* lookup to an Extension type. 508823f8cd15f16bb9dc3991c2672f16dd90579711bjvr If the offset from a lookup to subtable overflowed, then we must promote it 509823f8cd15f16bb9dc3991c2672f16dd90579711bjvr to an Extension Lookup type. 510823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ 511823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 0 512823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookupIndex = overflowRecord.LookupListIndex 5139e6ef94b5554c5b7dda2de9c863c11ed4b996b7aBehdad Esfahbod if (overflowRecord.SubTableIndex is None): 514823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookupIndex = lookupIndex - 1 515823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if lookupIndex < 0: 516823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 517823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if overflowRecord.tableType == 'GSUB': 518823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extType = 7 519823f8cd15f16bb9dc3991c2672f16dd90579711bjvr elif overflowRecord.tableType == 'GPOS': 520823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extType = 9 521823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 522823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookups = ttf[overflowRecord.tableType].table.LookupList.Lookup 523823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup = lookups[lookupIndex] 524823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # If the previous lookup is an extType, look further back. Very unlikely, but possible. 525823f8cd15f16bb9dc3991c2672f16dd90579711bjvr while lookup.LookupType == extType: 526823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookupIndex = lookupIndex -1 527823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if lookupIndex < 0: 528823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 529823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup = lookups[lookupIndex] 530823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 531823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for si in range(len(lookup.SubTable)): 532823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subTable = lookup.SubTable[si] 533823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTableClass = lookupTypes[overflowRecord.tableType][extType] 534823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable = extSubTableClass() 535823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable.Format = 1 536823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable.ExtensionLookupType = lookup.LookupType 537823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable.ExtSubTable = subTable 538823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTable[si] = extSubTable 539823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.LookupType = extType 540823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 1 541823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 542823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 543823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef splitAlternateSubst(oldSubTable, newSubTable, overflowRecord): 544823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 1 545823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.Format = oldSubTable.Format 546823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if hasattr(oldSubTable, 'sortCoverageLast'): 547823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.sortCoverageLast = oldSubTable.sortCoverageLast 548823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 549ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod oldAlts = sorted(oldSubTable.alternates.items()) 550823f8cd15f16bb9dc3991c2672f16dd90579711bjvr oldLen = len(oldAlts) 551823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 552823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if overflowRecord.itemName in [ 'Coverage', 'RangeRecord']: 553823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Coverage table is written last. overflow is to or within the 554823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # the coverage table. We will just cut the subtable in half. 55532c10eecffb4923e0721c395e4b80fb732543f18Behdad Esfahbod newLen = oldLen//2 556823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 557823f8cd15f16bb9dc3991c2672f16dd90579711bjvr elif overflowRecord.itemName == 'AlternateSet': 558823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # We just need to back up by two items 559823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # from the overflowed AlternateSet index to make sure the offset 560823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # to the Coverage table doesn't overflow. 561823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newLen = overflowRecord.itemIndex - 1 562823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 563823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.alternates = {} 564823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for i in range(newLen, oldLen): 565823f8cd15f16bb9dc3991c2672f16dd90579711bjvr item = oldAlts[i] 566823f8cd15f16bb9dc3991c2672f16dd90579711bjvr key = item[0] 567823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.alternates[key] = item[1] 568823f8cd15f16bb9dc3991c2672f16dd90579711bjvr del oldSubTable.alternates[key] 569823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 570823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 571823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 572823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 573823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 574823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef splitLigatureSubst(oldSubTable, newSubTable, overflowRecord): 575823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 1 576823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.Format = oldSubTable.Format 577ac1b4359467ca3deab03186a15eae1d55eb35567Behdad Esfahbod oldLigs = sorted(oldSubTable.ligatures.items()) 578823f8cd15f16bb9dc3991c2672f16dd90579711bjvr oldLen = len(oldLigs) 579823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 580823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if overflowRecord.itemName in [ 'Coverage', 'RangeRecord']: 581823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # Coverage table is written last. overflow is to or within the 582823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # the coverage table. We will just cut the subtable in half. 58332c10eecffb4923e0721c395e4b80fb732543f18Behdad Esfahbod newLen = oldLen//2 584823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 585823f8cd15f16bb9dc3991c2672f16dd90579711bjvr elif overflowRecord.itemName == 'LigatureSet': 586823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # We just need to back up by two items 587823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # from the overflowed AlternateSet index to make sure the offset 588823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # to the Coverage table doesn't overflow. 589823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newLen = overflowRecord.itemIndex - 1 590823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 591823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.ligatures = {} 592823f8cd15f16bb9dc3991c2672f16dd90579711bjvr for i in range(newLen, oldLen): 593823f8cd15f16bb9dc3991c2672f16dd90579711bjvr item = oldLigs[i] 594823f8cd15f16bb9dc3991c2672f16dd90579711bjvr key = item[0] 595823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable.ligatures[key] = item[1] 596823f8cd15f16bb9dc3991c2672f16dd90579711bjvr del oldSubTable.ligatures[key] 597823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 598823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 599823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 600823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 601823f8cd15f16bb9dc3991c2672f16dd90579711bjvrsplitTable = { 'GSUB': { 602823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 1: splitSingleSubst, 603823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 2: splitMultipleSubst, 604823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 3: splitAlternateSubst, 605823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 4: splitLigatureSubst, 606823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 5: splitContextSubst, 607823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 6: splitChainContextSubst, 608823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 7: splitExtensionSubst, 609823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 8: splitReverseChainSingleSubst, 610823f8cd15f16bb9dc3991c2672f16dd90579711bjvr }, 611823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 'GPOS': { 612823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 1: splitSinglePos, 613823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 2: splitPairPos, 614823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 3: splitCursivePos, 615823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 4: splitMarkBasePos, 616823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 5: splitMarkLigPos, 617823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 6: splitMarkMarkPos, 618823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 7: splitContextPos, 619823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 8: splitChainContextPos, 620823f8cd15f16bb9dc3991c2672f16dd90579711bjvr# 9: splitExtensionPos, 621823f8cd15f16bb9dc3991c2672f16dd90579711bjvr } 622823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 623823f8cd15f16bb9dc3991c2672f16dd90579711bjvr } 624823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 625823f8cd15f16bb9dc3991c2672f16dd90579711bjvrdef fixSubTableOverFlows(ttf, overflowRecord): 626823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ 627823f8cd15f16bb9dc3991c2672f16dd90579711bjvr An offset has overflowed within a sub-table. We need to divide this subtable into smaller parts. 628823f8cd15f16bb9dc3991c2672f16dd90579711bjvr """ 629823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = 0 630823f8cd15f16bb9dc3991c2672f16dd90579711bjvr table = ttf[overflowRecord.tableType].table 631823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup = table.LookupList.Lookup[overflowRecord.LookupListIndex] 632823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subIndex = overflowRecord.SubTableIndex 633823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subtable = lookup.SubTable[subIndex] 634823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 635823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if hasattr(subtable, 'ExtSubTable'): 636823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # We split the subtable of the Extension table, and add a new Extension table 637823f8cd15f16bb9dc3991c2672f16dd90579711bjvr # to contain the new subtable. 638823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 639823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subTableType = subtable.ExtensionLookupType 640823f8cd15f16bb9dc3991c2672f16dd90579711bjvr extSubTable = subtable 641823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subtable = extSubTable.ExtSubTable 642823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTableClass = lookupTypes[overflowRecord.tableType][lookup.LookupType] 643823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable = newExtSubTableClass() 644823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable.Format = extSubTable.Format 645823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable.ExtensionLookupType = extSubTable.ExtensionLookupType 646823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTable.insert(subIndex + 1, newExtSubTable) 647823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 648823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTableClass = lookupTypes[overflowRecord.tableType][subTableType] 649823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable = newSubTableClass() 650823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newExtSubTable.ExtSubTable = newSubTable 651823f8cd15f16bb9dc3991c2672f16dd90579711bjvr else: 652823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subTableType = lookup.LookupType 653823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTableClass = lookupTypes[overflowRecord.tableType][subTableType] 654823f8cd15f16bb9dc3991c2672f16dd90579711bjvr newSubTable = newSubTableClass() 655823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTable.insert(subIndex + 1, newSubTable) 656823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 657823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if hasattr(lookup, 'SubTableCount'): # may not be defined yet. 658823f8cd15f16bb9dc3991c2672f16dd90579711bjvr lookup.SubTableCount = lookup.SubTableCount + 1 659823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 660823f8cd15f16bb9dc3991c2672f16dd90579711bjvr try: 661823f8cd15f16bb9dc3991c2672f16dd90579711bjvr splitFunc = splitTable[overflowRecord.tableType][subTableType] 662823f8cd15f16bb9dc3991c2672f16dd90579711bjvr except KeyError: 663823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 664823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 665823f8cd15f16bb9dc3991c2672f16dd90579711bjvr ok = splitFunc(subtable, newSubTable, overflowRecord) 666823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return ok 667823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 668e5b245fd074a2efa5fc8902cb7a11a5dcad0f3f5jvr# End of OverFlow logic 669823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 670823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 671d4d151390d1288f8d2df30f6dfa26a309c7334dajvrdef _buildClasses(): 672e1d97b827791a4d190fbd0ec597f602aefd09025Behdad Esfahbod import re 6732b06aaa2a6bcd363c25fb0c43f6bb906906594bdBehdad Esfahbod from .otData import otData 674d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 675d4d151390d1288f8d2df30f6dfa26a309c7334dajvr formatPat = re.compile("([A-Za-z0-9]+)Format(\d+)$") 676d4d151390d1288f8d2df30f6dfa26a309c7334dajvr namespace = globals() 677d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 678d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # populate module with classes 679d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for name, table in otData: 680d4d151390d1288f8d2df30f6dfa26a309c7334dajvr baseClass = BaseTable 681d4d151390d1288f8d2df30f6dfa26a309c7334dajvr m = formatPat.match(name) 682d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if m: 683d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # XxxFormatN subtable, we only add the "base" table 684d4d151390d1288f8d2df30f6dfa26a309c7334dajvr name = m.group(1) 685d4d151390d1288f8d2df30f6dfa26a309c7334dajvr baseClass = FormatSwitchingBaseTable 686bc5e1cb195c0bfa1c8e7507326d5a9ad05aecb4bBehdad Esfahbod if name not in namespace: 68764b5c80e80444a124da335e8d4d208bffcf2737bjvr # the class doesn't exist yet, so the base implementation is used. 688e1d97b827791a4d190fbd0ec597f602aefd09025Behdad Esfahbod cls = type(name, (baseClass,), {}) 689d4d151390d1288f8d2df30f6dfa26a309c7334dajvr namespace[name] = cls 690d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 69164b5c80e80444a124da335e8d4d208bffcf2737bjvr for base, alts in _equivalents.items(): 692d4d151390d1288f8d2df30f6dfa26a309c7334dajvr base = namespace[base] 693d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for alt in alts: 694e1d97b827791a4d190fbd0ec597f602aefd09025Behdad Esfahbod namespace[alt] = type(alt, (base,), {}) 695d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 696d4d151390d1288f8d2df30f6dfa26a309c7334dajvr global lookupTypes 697d4d151390d1288f8d2df30f6dfa26a309c7334dajvr lookupTypes = { 698d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 'GSUB': { 699d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 1: SingleSubst, 700d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 2: MultipleSubst, 701d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 3: AlternateSubst, 702d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 4: LigatureSubst, 703d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 5: ContextSubst, 704d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 6: ChainContextSubst, 705d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 7: ExtensionSubst, 7068e1d75b1a3fb4874bb78d9c34a11ba30de81a5ccjvr 8: ReverseChainSingleSubst, 707d4d151390d1288f8d2df30f6dfa26a309c7334dajvr }, 708d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 'GPOS': { 709d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 1: SinglePos, 710d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 2: PairPos, 711d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 3: CursivePos, 712d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 4: MarkBasePos, 713d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 5: MarkLigPos, 714d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 6: MarkMarkPos, 715d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 7: ContextPos, 716d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 8: ChainContextPos, 717d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 9: ExtensionPos, 718d4d151390d1288f8d2df30f6dfa26a309c7334dajvr }, 719d4d151390d1288f8d2df30f6dfa26a309c7334dajvr } 720d4d151390d1288f8d2df30f6dfa26a309c7334dajvr lookupTypes['JSTF'] = lookupTypes['GPOS'] # JSTF contains GPOS 72164b5c80e80444a124da335e8d4d208bffcf2737bjvr for lookupEnum in lookupTypes.values(): 72264b5c80e80444a124da335e8d4d208bffcf2737bjvr for enum, cls in lookupEnum.items(): 72364b5c80e80444a124da335e8d4d208bffcf2737bjvr cls.LookupType = enum 7249e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 7259e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod global featureParamTypes 7269e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod featureParamTypes = { 7279e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod 'size': FeatureParamsSize, 7289e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod } 7299e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod for i in range(1, 20+1): 7309e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod featureParamTypes['ss%02d' % i] = FeatureParamsStylisticSet 7319e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod for i in range(1, 99+1): 7329e1bd2d0b4416acc7fce623a3bae37064d61d15bBehdad Esfahbod featureParamTypes['cv%02d' % i] = FeatureParamsCharacterVariants 733d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 734d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # add converters to classes 7352b06aaa2a6bcd363c25fb0c43f6bb906906594bdBehdad Esfahbod from .otConverters import buildConverters 736d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for name, table in otData: 737d4d151390d1288f8d2df30f6dfa26a309c7334dajvr m = formatPat.match(name) 738d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if m: 739d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # XxxFormatN subtable, add converter to "base" table 740d4d151390d1288f8d2df30f6dfa26a309c7334dajvr name, format = m.groups() 741d4d151390d1288f8d2df30f6dfa26a309c7334dajvr format = int(format) 742d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls = namespace[name] 743d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if not hasattr(cls, "converters"): 744d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.converters = {} 745d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.convertersByName = {} 74664b5c80e80444a124da335e8d4d208bffcf2737bjvr converters, convertersByName = buildConverters(table[1:], namespace) 747d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.converters[format] = converters 748d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls.convertersByName[format] = convertersByName 749d4d151390d1288f8d2df30f6dfa26a309c7334dajvr else: 750d4d151390d1288f8d2df30f6dfa26a309c7334dajvr cls = namespace[name] 75164b5c80e80444a124da335e8d4d208bffcf2737bjvr cls.converters, cls.convertersByName = buildConverters(table, namespace) 752d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 753d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 754d4d151390d1288f8d2df30f6dfa26a309c7334dajvr_buildClasses() 7551fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr 7561fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr 7571fae9b48d3a275c6e1dc0649c40ae121dfc4098djvrdef _getGlyphsFromCoverageTable(coverage): 7581fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr if coverage is None: 7591fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr # empty coverage table 7601fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr return [] 7611fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr else: 7621fae9b48d3a275c6e1dc0649c40ae121dfc4098djvr return coverage.glyphs 763