1 from __future__ import print_function, division, absolute_import 2 from fontTools.misc.py23 import * 3 from fontTools.misc.textTools import safeEval 4 from . import DefaultTable 5 import struct 6 7 8 GASP_SYMMETRIC_GRIDFIT = 0x0004 9 GASP_SYMMETRIC_SMOOTHING = 0x0008 10 GASP_DOGRAY = 0x0002 11 GASP_GRIDFIT = 0x0001 12 13 class table__g_a_s_p(DefaultTable.DefaultTable): 14 15 def decompile(self, data, ttFont): 16 self.version, numRanges = struct.unpack(">HH", data[:4]) 17 assert 0 <= self.version <= 1, "unknown 'gasp' format: %s" % self.version 18 data = data[4:] 19 self.gaspRange = {} 20 for i in range(numRanges): 21 rangeMaxPPEM, rangeGaspBehavior = struct.unpack(">HH", data[:4]) 22 self.gaspRange[int(rangeMaxPPEM)] = int(rangeGaspBehavior) 23 data = data[4:] 24 assert not data, "too much data" 25 26 def compile(self, ttFont): 27 version = 0 # ignore self.version 28 numRanges = len(self.gaspRange) 29 data = b"" 30 items = sorted(self.gaspRange.items()) 31 for rangeMaxPPEM, rangeGaspBehavior in items: 32 data = data + struct.pack(">HH", rangeMaxPPEM, rangeGaspBehavior) 33 if rangeGaspBehavior & ~(GASP_GRIDFIT | GASP_DOGRAY): 34 version = 1 35 data = struct.pack(">HH", version, numRanges) + data 36 return data 37 38 def toXML(self, writer, ttFont): 39 items = sorted(self.gaspRange.items()) 40 for rangeMaxPPEM, rangeGaspBehavior in items: 41 writer.simpletag("gaspRange", [ 42 ("rangeMaxPPEM", rangeMaxPPEM), 43 ("rangeGaspBehavior", rangeGaspBehavior)]) 44 writer.newline() 45 46 def fromXML(self, name, attrs, content, ttFont): 47 if name != "gaspRange": 48 return 49 if not hasattr(self, "gaspRange"): 50 self.gaspRange = {} 51 self.gaspRange[safeEval(attrs["rangeMaxPPEM"])] = safeEval(attrs["rangeGaspBehavior"]) 52 53
