1 from __future__ import print_function, division, absolute_import 2 from fontTools.misc.py23 import * 3 from . import DefaultTable 4 import struct 5 6 tsi0Format = '>HHl' 7 8 def fixlongs(glyphID, textLength, textOffset): 9 return int(glyphID), int(textLength), textOffset 10 11 12 class table_T_S_I__0(DefaultTable.DefaultTable): 13 14 dependencies = ["TSI1"] 15 16 def decompile(self, data, ttFont): 17 numGlyphs = ttFont['maxp'].numGlyphs 18 indices = [] 19 size = struct.calcsize(tsi0Format) 20 for i in range(numGlyphs + 5): 21 glyphID, textLength, textOffset = fixlongs(*struct.unpack(tsi0Format, data[:size])) 22 indices.append((glyphID, textLength, textOffset)) 23 data = data[size:] 24 assert len(data) == 0 25 assert indices[-5] == (0XFFFE, 0, -1409540300), "bad magic number" # 0xABFC1F34 26 self.indices = indices[:-5] 27 self.extra_indices = indices[-4:] 28 29 def compile(self, ttFont): 30 if not hasattr(self, "indices"): 31 # We have no corresponding table (TSI1 or TSI3); let's return 32 # no data, which effectively means "ignore us". 33 return "" 34 data = b"" 35 for index, textLength, textOffset in self.indices: 36 data = data + struct.pack(tsi0Format, index, textLength, textOffset) 37 data = data + struct.pack(tsi0Format, 0XFFFE, 0, -1409540300) # 0xABFC1F34 38 for index, textLength, textOffset in self.extra_indices: 39 data = data + struct.pack(tsi0Format, index, textLength, textOffset) 40 return data 41 42 def set(self, indices, extra_indices): 43 # gets called by 'TSI1' or 'TSI3' 44 self.indices = indices 45 self.extra_indices = extra_indices 46 47 def toXML(self, writer, ttFont): 48 writer.comment("This table will be calculated by the compiler") 49 writer.newline() 50 51
