G_M_A_P_.py revision 7cc6d271ac955782d730161b27e728001fb5f347 
1from . import DefaultTable
2from fontTools.misc import sstruct
3from types import StringType
4from fontTools.misc.textTools import safeEval, num2binary, binary2num
5
6GMAPFormat = """
7		>	# big endian
8		tableVersionMajor:	H
9		tableVersionMinor: 	H
10		flags:	H
11		recordsCount:		H
12		recordsOffset:		H
13		fontNameLength:		H
14"""
15# psFontName is a byte string which follows the record above. This is zero padded
16# to the beginning of the records array. The recordsOffsst is 32 bit aligned.
17
18GMAPRecordFormat1 = """
19		>	# big endian
20		UV:			L
21		cid:		H
22		gid:		H
23		ggid:		H
24		name:		32s
25"""
26
27
28
29class GMAPRecord:
30	def __init__(self, uv = 0, cid = 0, gid = 0, ggid = 0, name = ""):
31		self.UV = uv
32		self.cid = cid
33		self.gid = gid
34		self.ggid = ggid
35		self.name = name
36
37	def toXML(self, writer, ttFont):
38		writer.begintag("GMAPRecord")
39		writer.newline()
40		writer.simpletag("UV", value=self.UV)
41		writer.newline()
42		writer.simpletag("cid", value=self.cid)
43		writer.newline()
44		writer.simpletag("gid", value=self.gid)
45		writer.newline()
46		writer.simpletag("glyphletGid", value=self.gid)
47		writer.newline()
48		writer.simpletag("GlyphletName", value=self.name)
49		writer.newline()
50		writer.endtag("GMAPRecord")
51		writer.newline()
52
53
54	def fromXML(self, name, attrs, content, ttFont):
55		value = attrs["value"]
56		if name == "GlyphletName":
57			self.name = value
58		else:
59			setattr(self, name, safeEval(value))
60
61
62	def compile(self, ttFont):
63		if 	self.UV == None:
64			self.UV = 0
65		nameLen =  len(self.name)
66		if nameLen < 32:
67			self.name = self.name + "\0"*(32 - nameLen)
68		data = sstruct.pack(GMAPRecordFormat1, self)
69		return data
70
71	def __repr__(self):
72		return "GMAPRecord[ UV: " + str(self.UV) + ", cid: " + str(self.cid) + ", gid: " + str(self.gid) + ", ggid: " + str(self.ggid) + ", Glyphlet Name: " + str(self.name) + " ]"
73
74
75class table_G_M_A_P_(DefaultTable.DefaultTable):
76
77	dependencies = []
78
79	def decompile(self, data, ttFont):
80		dummy, newData = sstruct.unpack2(GMAPFormat, data, self)
81		self.psFontName = newData[:self.fontNameLength]
82		assert (self.recordsOffset % 4) == 0, "GMAP error: recordsOffset is not 32 bit aligned."
83		newData = data[self.recordsOffset:]
84		self.gmapRecords = []
85		for i in range (self.recordsCount):
86			gmapRecord, newData = sstruct.unpack2(GMAPRecordFormat1, newData, GMAPRecord())
87			gmapRecord.name = gmapRecord.name.strip('\0')
88			self.gmapRecords.append(gmapRecord)
89
90
91	def compile(self, ttFont):
92		self.recordsCount = len(self.gmapRecords)
93		self.fontNameLength = len(self.psFontName)
94		self.recordsOffset = 4 *(((self.fontNameLength + 12)  + 3) /4)
95		data = sstruct.pack(GMAPFormat, self)
96		data = data + self.psFontName
97		data = data + "\0" * (self.recordsOffset - len(data))
98		for record in self.gmapRecords:
99			data = data + record.compile(ttFont)
100		return data
101
102
103	def toXML(self, writer, ttFont):
104		writer.comment("Most of this table will be recalculated by the compiler")
105		writer.newline()
106		formatstring, names, fixes = sstruct.getformat(GMAPFormat)
107		for name in names:
108			value = getattr(self, name)
109			writer.simpletag(name, value=value)
110			writer.newline()
111		writer.simpletag("PSFontName", value=self.psFontName)
112		writer.newline()
113		for gmapRecord in self.gmapRecords:
114			gmapRecord.toXML(writer, ttFont)
115
116	def fromXML(self, name, attrs, content, ttFont):
117		if name == "GMAPRecord":
118			if not hasattr(self, "gmapRecords"):
119				self.gmapRecords = []
120			gmapRecord = GMAPRecord()
121			self.gmapRecords.append(gmapRecord)
122			for element in content:
123				if isinstance(element, StringType):
124					continue
125				name, attrs, content = element
126				gmapRecord.fromXML(name, attrs, content, ttFont)
127		else:
128			value = attrs["value"]
129			if name == "PSFontName":
130				self.psFontName = value
131			else:
132				setattr(self, name, safeEval(value))
133