_h_h_e_a.py revision 978b1ea8774d2ed24d12099b60bfa53fea3239b4
17842e56b97ce677b83bdab09cda48bc2d89ac75aJustimport DefaultTable 28413c108d21e8cf0e9059bbfffde8d13f2616340Behdad Esfahbodfrom fontTools.misc import sstruct 37842e56b97ce677b83bdab09cda48bc2d89ac75aJustfrom fontTools.misc.textTools import safeEval 47842e56b97ce677b83bdab09cda48bc2d89ac75aJust 5e69caf8771a0dd675ca3c4490625dac963a6b65cjvr 67842e56b97ce677b83bdab09cda48bc2d89ac75aJusthheaFormat = """ 7e69caf8771a0dd675ca3c4490625dac963a6b65cjvr > # big endian 8e69caf8771a0dd675ca3c4490625dac963a6b65cjvr tableVersion: 16.16F 9e69caf8771a0dd675ca3c4490625dac963a6b65cjvr ascent: h 10e69caf8771a0dd675ca3c4490625dac963a6b65cjvr descent: h 11e69caf8771a0dd675ca3c4490625dac963a6b65cjvr lineGap: h 12e69caf8771a0dd675ca3c4490625dac963a6b65cjvr advanceWidthMax: H 13e69caf8771a0dd675ca3c4490625dac963a6b65cjvr minLeftSideBearing: h 14e69caf8771a0dd675ca3c4490625dac963a6b65cjvr minRightSideBearing: h 15e69caf8771a0dd675ca3c4490625dac963a6b65cjvr xMaxExtent: h 16e69caf8771a0dd675ca3c4490625dac963a6b65cjvr caretSlopeRise: h 17e69caf8771a0dd675ca3c4490625dac963a6b65cjvr caretSlopeRun: h 185aaeac333388f2859191e2648e2b8287372a1637jvr caretOffset: h 19e69caf8771a0dd675ca3c4490625dac963a6b65cjvr reserved0: h 20e69caf8771a0dd675ca3c4490625dac963a6b65cjvr reserved1: h 21e69caf8771a0dd675ca3c4490625dac963a6b65cjvr reserved2: h 22e69caf8771a0dd675ca3c4490625dac963a6b65cjvr reserved3: h 23e69caf8771a0dd675ca3c4490625dac963a6b65cjvr metricDataFormat: h 24e69caf8771a0dd675ca3c4490625dac963a6b65cjvr numberOfHMetrics: H 257842e56b97ce677b83bdab09cda48bc2d89ac75aJust""" 267842e56b97ce677b83bdab09cda48bc2d89ac75aJust 27e69caf8771a0dd675ca3c4490625dac963a6b65cjvr 287842e56b97ce677b83bdab09cda48bc2d89ac75aJustclass table__h_h_e_a(DefaultTable.DefaultTable): 297842e56b97ce677b83bdab09cda48bc2d89ac75aJust 307842e56b97ce677b83bdab09cda48bc2d89ac75aJust dependencies = ['hmtx', 'glyf'] 317842e56b97ce677b83bdab09cda48bc2d89ac75aJust 327842e56b97ce677b83bdab09cda48bc2d89ac75aJust def decompile(self, data, ttFont): 336d73fdef1cd1e62a230647845d37915f0f8df792jvr sstruct.unpack(hheaFormat, data, self) 347842e56b97ce677b83bdab09cda48bc2d89ac75aJust 357842e56b97ce677b83bdab09cda48bc2d89ac75aJust def compile(self, ttFont): 363e097c609540944dd9290ad58df346ca86492031Just if ttFont.isLoaded('glyf') and ttFont.recalcBBoxes: 373e097c609540944dd9290ad58df346ca86492031Just self.recalc(ttFont) 387842e56b97ce677b83bdab09cda48bc2d89ac75aJust return sstruct.pack(hheaFormat, self) 397842e56b97ce677b83bdab09cda48bc2d89ac75aJust 407842e56b97ce677b83bdab09cda48bc2d89ac75aJust def recalc(self, ttFont): 417842e56b97ce677b83bdab09cda48bc2d89ac75aJust hmtxTable = ttFont['hmtx'] 427842e56b97ce677b83bdab09cda48bc2d89ac75aJust if ttFont.has_key('glyf'): 437842e56b97ce677b83bdab09cda48bc2d89ac75aJust glyfTable = ttFont['glyf'] 44d7921e33d9d1944c394e6c17b3746e7108dd1da4Roozbeh Pournader INFINITY = 100000 45246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod advanceWidthMax = 0 46d7921e33d9d1944c394e6c17b3746e7108dd1da4Roozbeh Pournader minLeftSideBearing = +INFINITY # arbitrary big number 47d7921e33d9d1944c394e6c17b3746e7108dd1da4Roozbeh Pournader minRightSideBearing = +INFINITY # arbitrary big number 48d7921e33d9d1944c394e6c17b3746e7108dd1da4Roozbeh Pournader xMaxExtent = -INFINITY # arbitrary big negative number 497842e56b97ce677b83bdab09cda48bc2d89ac75aJust 507842e56b97ce677b83bdab09cda48bc2d89ac75aJust for name in ttFont.getGlyphOrder(): 517842e56b97ce677b83bdab09cda48bc2d89ac75aJust width, lsb = hmtxTable[name] 52335f182a585975725c316d66add5e8cdd9f34e6aBehdad Esfahbod advanceWidthMax = max(advanceWidthMax, width) 537bdf6d39fc124bfcbc8bafb0c3f7a64b5c85cd2fBehdad Esfahbod g = glyfTable[name] 549222b8ef93fd6b41f9c4dcf152593cd0c80f0ba4Behdad Esfahbod if g.numberOfContours == 0: 557842e56b97ce677b83bdab09cda48bc2d89ac75aJust continue 569222b8ef93fd6b41f9c4dcf152593cd0c80f0ba4Behdad Esfahbod if g.numberOfContours < 0 and not hasattr(g, "xMax"): 579222b8ef93fd6b41f9c4dcf152593cd0c80f0ba4Behdad Esfahbod # Composite glyph without extents set. 589222b8ef93fd6b41f9c4dcf152593cd0c80f0ba4Behdad Esfahbod # Calculate those. 599222b8ef93fd6b41f9c4dcf152593cd0c80f0ba4Behdad Esfahbod g.recalcBounds(glyfTable) 607842e56b97ce677b83bdab09cda48bc2d89ac75aJust minLeftSideBearing = min(minLeftSideBearing, lsb) 617842e56b97ce677b83bdab09cda48bc2d89ac75aJust rsb = width - lsb - (g.xMax - g.xMin) 627842e56b97ce677b83bdab09cda48bc2d89ac75aJust minRightSideBearing = min(minRightSideBearing, rsb) 637842e56b97ce677b83bdab09cda48bc2d89ac75aJust extent = lsb + (g.xMax - g.xMin) 647842e56b97ce677b83bdab09cda48bc2d89ac75aJust xMaxExtent = max(xMaxExtent, extent) 65246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod 66978b1ea8774d2ed24d12099b60bfa53fea3239b4Behdad Esfahbod if xMaxExtent == -INFINITY: 67246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod # No glyph has outlines. 68246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod minLeftSideBearing = 0 69246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod minRightSideBearing = 0 70246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod xMaxExtent = 0 71246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod 72246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod self.advanceWidthMax = advanceWidthMax 73246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod self.minLeftSideBearing = minLeftSideBearing 74246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod self.minRightSideBearing = minRightSideBearing 75246301acc9a54c38f83dcbc9b15127edff33b804Behdad Esfahbod self.xMaxExtent = xMaxExtent 767842e56b97ce677b83bdab09cda48bc2d89ac75aJust else: 777842e56b97ce677b83bdab09cda48bc2d89ac75aJust # XXX CFF recalc... 787842e56b97ce677b83bdab09cda48bc2d89ac75aJust pass 797842e56b97ce677b83bdab09cda48bc2d89ac75aJust 807842e56b97ce677b83bdab09cda48bc2d89ac75aJust def toXML(self, writer, ttFont): 817842e56b97ce677b83bdab09cda48bc2d89ac75aJust formatstring, names, fixes = sstruct.getformat(hheaFormat) 827842e56b97ce677b83bdab09cda48bc2d89ac75aJust for name in names: 837842e56b97ce677b83bdab09cda48bc2d89ac75aJust value = getattr(self, name) 847842e56b97ce677b83bdab09cda48bc2d89ac75aJust if type(value) == type(0L): 857842e56b97ce677b83bdab09cda48bc2d89ac75aJust value = int(value) 867842e56b97ce677b83bdab09cda48bc2d89ac75aJust writer.simpletag(name, value=value) 877842e56b97ce677b83bdab09cda48bc2d89ac75aJust writer.newline() 887842e56b97ce677b83bdab09cda48bc2d89ac75aJust 897842e56b97ce677b83bdab09cda48bc2d89ac75aJust def fromXML(self, (name, attrs, content), ttFont): 907842e56b97ce677b83bdab09cda48bc2d89ac75aJust setattr(self, name, safeEval(attrs["value"])) 917842e56b97ce677b83bdab09cda48bc2d89ac75aJust 92