otConverters.py revision d58c38dc3660f764b659ec13fcbc6e54c1ec2078
1d4d151390d1288f8d2df30f6dfa26a309c7334dajvrfrom types import TupleType 2d4d151390d1288f8d2df30f6dfa26a309c7334dajvrfrom fontTools.misc.textTools import safeEval 3d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 4d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 564b5c80e80444a124da335e8d4d208bffcf2737bjvrdef buildConverters(tableSpec, tableNamespace): 664b5c80e80444a124da335e8d4d208bffcf2737bjvr """Given a table spec from otData.py, build a converter object for each 764b5c80e80444a124da335e8d4d208bffcf2737bjvr field of the table. This is called for each table in otData.py, and 864b5c80e80444a124da335e8d4d208bffcf2737bjvr the results are assigned to the corresponding class in otTables.py.""" 9d4d151390d1288f8d2df30f6dfa26a309c7334dajvr converters = [] 10d4d151390d1288f8d2df30f6dfa26a309c7334dajvr convertersByName = {} 11d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for tp, name, repeat, repeatOffset, descr in tableSpec: 12d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if name.startswith("ValueFormat"): 13d4d151390d1288f8d2df30f6dfa26a309c7334dajvr assert tp == "uint16" 14d4d151390d1288f8d2df30f6dfa26a309c7334dajvr converterClass = ValueFormat 15d4d151390d1288f8d2df30f6dfa26a309c7334dajvr elif name.endswith("Count"): 16d4d151390d1288f8d2df30f6dfa26a309c7334dajvr assert tp == "uint16" 17d4d151390d1288f8d2df30f6dfa26a309c7334dajvr converterClass = Count 18d4d151390d1288f8d2df30f6dfa26a309c7334dajvr elif name == "SubTable": 19d4d151390d1288f8d2df30f6dfa26a309c7334dajvr converterClass = SubTable 20823f8cd15f16bb9dc3991c2672f16dd90579711bjvr elif name == "ExtSubTable": 21823f8cd15f16bb9dc3991c2672f16dd90579711bjvr converterClass = ExtSubTable 22d4d151390d1288f8d2df30f6dfa26a309c7334dajvr else: 23d4d151390d1288f8d2df30f6dfa26a309c7334dajvr converterClass = converterMapping[tp] 24d4d151390d1288f8d2df30f6dfa26a309c7334dajvr tableClass = tableNamespace.get(name) 25d4d151390d1288f8d2df30f6dfa26a309c7334dajvr conv = converterClass(name, repeat, repeatOffset, tableClass) 26823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if name in ["SubTable", "ExtSubTable"]: 27d4d151390d1288f8d2df30f6dfa26a309c7334dajvr conv.lookupTypes = tableNamespace['lookupTypes'] 28d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # also create reverse mapping 29d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for t in conv.lookupTypes.values(): 30d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for cls in t.values(): 31823f8cd15f16bb9dc3991c2672f16dd90579711bjvr convertersByName[cls.__name__] = Table(name, repeat, repeatOffset, cls) 32d4d151390d1288f8d2df30f6dfa26a309c7334dajvr converters.append(conv) 33d4d151390d1288f8d2df30f6dfa26a309c7334dajvr assert not convertersByName.has_key(name) 34d4d151390d1288f8d2df30f6dfa26a309c7334dajvr convertersByName[name] = conv 35d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return converters, convertersByName 36d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 37d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 38d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbodclass BaseConverter(object): 39d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 4064b5c80e80444a124da335e8d4d208bffcf2737bjvr """Base class for converter objects. Apart from the constructor, this 4164b5c80e80444a124da335e8d4d208bffcf2737bjvr is an abstract class.""" 4264b5c80e80444a124da335e8d4d208bffcf2737bjvr 43d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def __init__(self, name, repeat, repeatOffset, tableClass): 44d4d151390d1288f8d2df30f6dfa26a309c7334dajvr self.name = name 45d4d151390d1288f8d2df30f6dfa26a309c7334dajvr self.repeat = repeat 46d4d151390d1288f8d2df30f6dfa26a309c7334dajvr self.repeatOffset = repeatOffset 47d4d151390d1288f8d2df30f6dfa26a309c7334dajvr self.tableClass = tableClass 48d4d151390d1288f8d2df30f6dfa26a309c7334dajvr self.isCount = name.endswith("Count") 49ee27eb8517ee53594a6232d110e17403a37ff2d9Behdad Esfahbod self.isPropagatedCount = name in ["ClassCount", "Class2Count"] 50d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 51078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 5264b5c80e80444a124da335e8d4d208bffcf2737bjvr """Read a value from the reader.""" 53d4d151390d1288f8d2df30f6dfa26a309c7334dajvr raise NotImplementedError, self 54d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 55078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 5664b5c80e80444a124da335e8d4d208bffcf2737bjvr """Write a value to the writer.""" 57d4d151390d1288f8d2df30f6dfa26a309c7334dajvr raise NotImplementedError, self 58d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 5964b5c80e80444a124da335e8d4d208bffcf2737bjvr def xmlRead(self, attrs, content, font): 6064b5c80e80444a124da335e8d4d208bffcf2737bjvr """Read a value from XML.""" 61d4d151390d1288f8d2df30f6dfa26a309c7334dajvr raise NotImplementedError, self 62d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 6364b5c80e80444a124da335e8d4d208bffcf2737bjvr def xmlWrite(self, xmlWriter, font, value, name, attrs): 6464b5c80e80444a124da335e8d4d208bffcf2737bjvr """Write a value to XML.""" 65d4d151390d1288f8d2df30f6dfa26a309c7334dajvr raise NotImplementedError, self 66d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 67d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 68d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass SimpleValue(BaseConverter): 69d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlWrite(self, xmlWriter, font, value, name, attrs): 70d4d151390d1288f8d2df30f6dfa26a309c7334dajvr xmlWriter.simpletag(name, attrs + [("value", value)]) 71d4d151390d1288f8d2df30f6dfa26a309c7334dajvr xmlWriter.newline() 72d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlRead(self, attrs, content, font): 73d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return attrs["value"] 74d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 75d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass IntValue(SimpleValue): 76d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlRead(self, attrs, content, font): 77ffc3cfeed12e67b383ed5f540d05cab01b33bb77Behdad Esfahbod return int(attrs["value"], 0) 78d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 79d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass Long(IntValue): 80078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 81d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return reader.readLong() 82078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 83d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeLong(value) 84d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 85a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbodclass Version(BaseConverter): 86078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 87a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value = reader.readLong() 88a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod assert (value >> 16) == 1, "Unsupported version 0x%08x" % value 89a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod return float(value) / 0x10000 90078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 91a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod if value < 0x10000: 92a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value *= 0x10000 93a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value = int(round(value)) 94a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod assert (value >> 16) == 1, "Unsupported version 0x%08x" % value 95a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod writer.writeLong(value) 967007a0854548f744c44bb9c35380efcba7894bfbjvr def xmlRead(self, attrs, content, font): 97a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value = attrs["value"] 98a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value = float(int(value, 0)) if value.startswith("0") else float(value) 99a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod if value >= 0x10000: 100a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value = float(value) / 0x10000 101a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod return value 102a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod def xmlWrite(self, xmlWriter, font, value, name, attrs): 103a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod if value >= 0x10000: 104a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value = float(value) / 0x10000 105a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod if value % 1 != 0: 106a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod # Write as hex 107a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod value = "0x%08x" % (int(round(value * 0x10000))) 108a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod xmlWriter.simpletag(name, attrs + [("value", value)]) 109a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod xmlWriter.newline() 110b776a882ee55fff8c39543f352c528bb5d338177jvr 111d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass Short(IntValue): 112078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 113d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return reader.readShort() 114078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 115d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeShort(value) 116d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 117d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass UShort(IntValue): 118078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 119d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return reader.readUShort() 120078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 121d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeUShort(value) 122d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 123d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass Count(Short): 124d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlWrite(self, xmlWriter, font, value, name, attrs): 125d4d151390d1288f8d2df30f6dfa26a309c7334dajvr xmlWriter.comment("%s=%s" % (name, value)) 126d4d151390d1288f8d2df30f6dfa26a309c7334dajvr xmlWriter.newline() 127d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 128d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass Tag(SimpleValue): 129078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 130d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return reader.readTag() 131078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 132d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeTag(value) 133d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 134d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass GlyphID(SimpleValue): 135078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 136823f8cd15f16bb9dc3991c2672f16dd90579711bjvr value = reader.readUShort() 137823f8cd15f16bb9dc3991c2672f16dd90579711bjvr value = font.getGlyphName(value) 138823f8cd15f16bb9dc3991c2672f16dd90579711bjvr return value 139823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 140078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 141823f8cd15f16bb9dc3991c2672f16dd90579711bjvr value = font.getGlyphID(value) 142823f8cd15f16bb9dc3991c2672f16dd90579711bjvr writer.writeUShort(value) 143d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 144b776a882ee55fff8c39543f352c528bb5d338177jvr 145d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass Struct(BaseConverter): 146d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 147078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 148d4d151390d1288f8d2df30f6dfa26a309c7334dajvr table = self.tableClass() 149078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod table.decompile(reader, font) 150d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return table 151d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 152078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 153078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod value.compile(writer, font) 154d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 155d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlWrite(self, xmlWriter, font, value, name, attrs): 156d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if value is None: 157d4d151390d1288f8d2df30f6dfa26a309c7334dajvr pass # NULL table, ignore 158d4d151390d1288f8d2df30f6dfa26a309c7334dajvr else: 159d4d151390d1288f8d2df30f6dfa26a309c7334dajvr value.toXML(xmlWriter, font, attrs) 160d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 161d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlRead(self, attrs, content, font): 162d4d151390d1288f8d2df30f6dfa26a309c7334dajvr table = self.tableClass() 163d4d151390d1288f8d2df30f6dfa26a309c7334dajvr Format = attrs.get("Format") 164d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if Format is not None: 165d4d151390d1288f8d2df30f6dfa26a309c7334dajvr table.Format = int(Format) 166d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for element in content: 16752966bb14409b558dc46b52d34953fbde7dc1bcajvr if type(element) == TupleType: 16852966bb14409b558dc46b52d34953fbde7dc1bcajvr name, attrs, content = element 16952966bb14409b558dc46b52d34953fbde7dc1bcajvr table.fromXML((name, attrs, content), font) 17052966bb14409b558dc46b52d34953fbde7dc1bcajvr else: 17152966bb14409b558dc46b52d34953fbde7dc1bcajvr pass 172d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return table 173d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 174d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 175d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass Table(Struct): 176fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod 177d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod longOffset = False 178d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod 179fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod def readOffset(self, reader): 180fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod return reader.readUShort() 181fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod 182fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod def writeNullOffset(self, writer): 183fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod if hasattr(self, "Extension"): 184fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod writer.writeULong(0) 185fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod else: 186fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod writer.writeUShort(0) 187d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 1887ef23a85ae49039ae491e337be173caba7bdd534Behdad Esfahbod def read(self, reader, font, tableDict): 189fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod offset = self.readOffset(reader) 190d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if offset == 0: 191d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return None 192d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if offset <= 3: 193d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # XXX hack to work around buggy pala.ttf 194d4d151390d1288f8d2df30f6dfa26a309c7334dajvr print "*** Warning: offset is not 0, yet suspiciously low (%s). table: %s" \ 195d4d151390d1288f8d2df30f6dfa26a309c7334dajvr % (offset, self.tableClass.__name__) 196d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return None 197d4d151390d1288f8d2df30f6dfa26a309c7334dajvr table = self.tableClass() 198c491f45eff9a884e69a44cbf9ae69288be9478b5Behdad Esfahbod table.reader = reader 199c491f45eff9a884e69a44cbf9ae69288be9478b5Behdad Esfahbod table.offset = offset 200c491f45eff9a884e69a44cbf9ae69288be9478b5Behdad Esfahbod table.font = font 201c491f45eff9a884e69a44cbf9ae69288be9478b5Behdad Esfahbod table.compileStatus = 1 2027ef23a85ae49039ae491e337be173caba7bdd534Behdad Esfahbod if not font.lazy: 203c491f45eff9a884e69a44cbf9ae69288be9478b5Behdad Esfahbod table.ensureDecompiled() 204d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return table 205d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 206078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 207d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod writer.longOffset = self.longOffset 208d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if value is None: 209fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod self.writeNullOffset(writer) 210d4d151390d1288f8d2df30f6dfa26a309c7334dajvr else: 211d4d151390d1288f8d2df30f6dfa26a309c7334dajvr subWriter = writer.getSubWriter() 212823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subWriter.name = self.name 213823f8cd15f16bb9dc3991c2672f16dd90579711bjvr if repeatIndex is not None: 214823f8cd15f16bb9dc3991c2672f16dd90579711bjvr subWriter.repeatIndex = repeatIndex 215d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeSubTable(subWriter) 216078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod value.compile(subWriter, font) 217d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 218d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbodclass LTable(Table): 219d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod 220d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod longOffset = True 221d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod 222d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod def readOffset(self, reader): 223d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod return reader.readULong() 224d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod 225d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod 226d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass SubTable(Table): 227d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def getConverter(self, tableType, lookupType): 228fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod tableClass = self.lookupTypes[tableType][lookupType] 229fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod return self.__class__(self.name, self.repeat, self.repeatOffset, tableClass) 230823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 231823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 232d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbodclass ExtSubTable(LTable, SubTable): 233823f8cd15f16bb9dc3991c2672f16dd90579711bjvr 234078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 235823f8cd15f16bb9dc3991c2672f16dd90579711bjvr writer.Extension = 1 # actually, mere presence of the field flags it as an Ext Subtable writer. 236fe67e3121e421e8f146c7b4df8b7188c620d1e5aBehdad Esfahbod Table.write(self, writer, font, tableDict, value, repeatIndex) 237d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 238d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 239d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass ValueFormat(IntValue): 240d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def __init__(self, name, repeat, repeatOffset, tableClass): 241d4d151390d1288f8d2df30f6dfa26a309c7334dajvr BaseConverter.__init__(self, name, repeat, repeatOffset, tableClass) 242d4d151390d1288f8d2df30f6dfa26a309c7334dajvr self.which = name[-1] == "2" 243078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 244d4d151390d1288f8d2df30f6dfa26a309c7334dajvr format = reader.readUShort() 245d4d151390d1288f8d2df30f6dfa26a309c7334dajvr reader.setValueFormat(format, self.which) 246d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return format 247078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, format, repeatIndex=None): 248d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeUShort(format) 249d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.setValueFormat(format, self.which) 250d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 251b776a882ee55fff8c39543f352c528bb5d338177jvr 252d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass ValueRecord(ValueFormat): 253078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 254d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return reader.readValueRecord(font, self.which) 255078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 256d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeValueRecord(value, font, self.which) 257d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlWrite(self, xmlWriter, font, value, name, attrs): 258d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if value is None: 259d4d151390d1288f8d2df30f6dfa26a309c7334dajvr pass # NULL table, ignore 260d4d151390d1288f8d2df30f6dfa26a309c7334dajvr else: 261d4d151390d1288f8d2df30f6dfa26a309c7334dajvr value.toXML(xmlWriter, font, self.name, attrs) 262d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlRead(self, attrs, content, font): 263d4d151390d1288f8d2df30f6dfa26a309c7334dajvr from otBase import ValueRecord 264d4d151390d1288f8d2df30f6dfa26a309c7334dajvr value = ValueRecord() 265d4d151390d1288f8d2df30f6dfa26a309c7334dajvr value.fromXML((None, attrs, content), font) 266d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return value 267d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 268d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 269d4d151390d1288f8d2df30f6dfa26a309c7334dajvrclass DeltaValue(BaseConverter): 270d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 271078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def read(self, reader, font, tableDict): 2722edc2da303716b9e401fd8dc808f54456d8137f2Behdad Esfahbod StartSize = tableDict["StartSize"] 2732edc2da303716b9e401fd8dc808f54456d8137f2Behdad Esfahbod EndSize = tableDict["EndSize"] 2742edc2da303716b9e401fd8dc808f54456d8137f2Behdad Esfahbod DeltaFormat = tableDict["DeltaFormat"] 275d4d151390d1288f8d2df30f6dfa26a309c7334dajvr assert DeltaFormat in (1, 2, 3), "illegal DeltaFormat" 276d4d151390d1288f8d2df30f6dfa26a309c7334dajvr nItems = EndSize - StartSize + 1 277d4d151390d1288f8d2df30f6dfa26a309c7334dajvr nBits = 1 << DeltaFormat 278d4d151390d1288f8d2df30f6dfa26a309c7334dajvr minusOffset = 1 << nBits 279d4d151390d1288f8d2df30f6dfa26a309c7334dajvr mask = (1 << nBits) - 1 280d4d151390d1288f8d2df30f6dfa26a309c7334dajvr signMask = 1 << (nBits - 1) 281d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 282d4d151390d1288f8d2df30f6dfa26a309c7334dajvr DeltaValue = [] 283d4d151390d1288f8d2df30f6dfa26a309c7334dajvr tmp, shift = 0, 0 284d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for i in range(nItems): 285d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if shift == 0: 286d4d151390d1288f8d2df30f6dfa26a309c7334dajvr tmp, shift = reader.readUShort(), 16 287d4d151390d1288f8d2df30f6dfa26a309c7334dajvr shift = shift - nBits 288d4d151390d1288f8d2df30f6dfa26a309c7334dajvr value = (tmp >> shift) & mask 289d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if value & signMask: 290d4d151390d1288f8d2df30f6dfa26a309c7334dajvr value = value - minusOffset 291d4d151390d1288f8d2df30f6dfa26a309c7334dajvr DeltaValue.append(value) 292d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return DeltaValue 293d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 294078b36325d7f64ae989e7db22e4910bf6550562dBehdad Esfahbod def write(self, writer, font, tableDict, value, repeatIndex=None): 2952edc2da303716b9e401fd8dc808f54456d8137f2Behdad Esfahbod StartSize = tableDict["StartSize"] 2962edc2da303716b9e401fd8dc808f54456d8137f2Behdad Esfahbod EndSize = tableDict["EndSize"] 2972edc2da303716b9e401fd8dc808f54456d8137f2Behdad Esfahbod DeltaFormat = tableDict["DeltaFormat"] 2986f9b64f2966d18cccad3fcf6e03f44f208dbc2a4Behdad Esfahbod DeltaValue = value 299d4d151390d1288f8d2df30f6dfa26a309c7334dajvr assert DeltaFormat in (1, 2, 3), "illegal DeltaFormat" 300d4d151390d1288f8d2df30f6dfa26a309c7334dajvr nItems = EndSize - StartSize + 1 301d4d151390d1288f8d2df30f6dfa26a309c7334dajvr nBits = 1 << DeltaFormat 302d4d151390d1288f8d2df30f6dfa26a309c7334dajvr assert len(DeltaValue) == nItems 303d4d151390d1288f8d2df30f6dfa26a309c7334dajvr mask = (1 << nBits) - 1 304d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 305d4d151390d1288f8d2df30f6dfa26a309c7334dajvr tmp, shift = 0, 16 306d4d151390d1288f8d2df30f6dfa26a309c7334dajvr for value in DeltaValue: 307d4d151390d1288f8d2df30f6dfa26a309c7334dajvr shift = shift - nBits 308d4d151390d1288f8d2df30f6dfa26a309c7334dajvr tmp = tmp | ((value & mask) << shift) 309d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if shift == 0: 310d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeUShort(tmp) 311d4d151390d1288f8d2df30f6dfa26a309c7334dajvr tmp, shift = 0, 16 312d4d151390d1288f8d2df30f6dfa26a309c7334dajvr if shift <> 16: 313d4d151390d1288f8d2df30f6dfa26a309c7334dajvr writer.writeUShort(tmp) 314d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 315d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlWrite(self, xmlWriter, font, value, name, attrs): 31664b5c80e80444a124da335e8d4d208bffcf2737bjvr # XXX this could do with a nicer format 317d4d151390d1288f8d2df30f6dfa26a309c7334dajvr xmlWriter.simpletag(name, attrs + [("value", value)]) 318d4d151390d1288f8d2df30f6dfa26a309c7334dajvr xmlWriter.newline() 319d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 320d4d151390d1288f8d2df30f6dfa26a309c7334dajvr def xmlRead(self, attrs, content, font): 321d4d151390d1288f8d2df30f6dfa26a309c7334dajvr return safeEval(attrs["value"]) 322d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 323d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 324d4d151390d1288f8d2df30f6dfa26a309c7334dajvrconverterMapping = { 325d4d151390d1288f8d2df30f6dfa26a309c7334dajvr # type class 326d4d151390d1288f8d2df30f6dfa26a309c7334dajvr "int16": Short, 327d4d151390d1288f8d2df30f6dfa26a309c7334dajvr "uint16": UShort, 328a221a57ccdeefc752384778444ee737d4559a516Behdad Esfahbod "Version": Version, 329d4d151390d1288f8d2df30f6dfa26a309c7334dajvr "Tag": Tag, 330d4d151390d1288f8d2df30f6dfa26a309c7334dajvr "GlyphID": GlyphID, 331d4d151390d1288f8d2df30f6dfa26a309c7334dajvr "struct": Struct, 332d4d151390d1288f8d2df30f6dfa26a309c7334dajvr "Offset": Table, 333d58c38dc3660f764b659ec13fcbc6e54c1ec2078Behdad Esfahbod "LOffset": LTable, 334d4d151390d1288f8d2df30f6dfa26a309c7334dajvr "ValueRecord": ValueRecord, 3357d130307e6e6094e40a841a3c41fc74b203b7e8eBehdad Esfahbod "DeltaValue": DeltaValue, 336d4d151390d1288f8d2df30f6dfa26a309c7334dajvr} 337d4d151390d1288f8d2df30f6dfa26a309c7334dajvr 338