cmap format 1 support, contributed by rroberts
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@554 4cde692c-a291-49d1-8350-778aa11640f8
This commit is contained in:
jvr
parent
7487a3a7fb
commit
0cb8a08d89
@ -30,6 +30,9 @@ class table__c_m_a_p(DefaultTable.DefaultTable):
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format, length = struct.unpack(">HH", data[offset:offset+4])
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if format in [8,10,12]:
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format, reserved, length = struct.unpack(">HHL", data[offset:offset+8])
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elif format in [14]:
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format, length = struct.unpack(">HL", data[offset:offset+6])
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if not length:
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print "Error: cmap subtable is reported as having zero length: platformID %s, platEncID %s, format %s offset %s. Skipping table." % (platformID, platEncID,format, offset)
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continue
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@ -1039,6 +1042,214 @@ class cmap_format_12(CmapSubtable):
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cmap[safeEval(attrs["code"])] = attrs["name"]
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def cvtToUVS(threeByteString):
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if sys.byteorder <> "big":
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data = "\0" +threeByteString
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else:
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data = threeByteString + "\0"
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val, = struct.unpack(">L", data)
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return val
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def cvtFromUVS(val):
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if sys.byteorder <> "big":
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threeByteString = struct.pack(">L", val)[1:]
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else:
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threeByteString = struct.pack(">L", val)[:3]
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return threeByteString
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def cmpUVSListEntry(first, second):
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uv1, glyphName1 = first
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uv2, glyphName2 = second
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if (glyphName1 == None) and (glyphName2 != None):
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return -1
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elif (glyphName2 == None) and (glyphName1 != None):
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return 1
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ret = cmp(uv1, uv2)
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if ret:
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return ret
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return cmp(glyphName1, glyphName2)
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class cmap_format_14(CmapSubtable):
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def decompileHeader(self, data, ttFont):
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format, length, numVarSelectorRecords = struct.unpack(">HLL", data[:10])
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self.data = data[10:]
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self.length = length
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self.numVarSelectorRecords = numVarSelectorRecords
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self.ttFont = ttFont
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self.language = 0xFF # has no language.
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def decompile(self, data, ttFont):
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if data != None and ttFont != None:
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self.decompileHeader(data, ttFont)
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else:
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assert( (data == None and (ttFont == None), "Need both data and ttFont arguments"))
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data = self.data
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self.cmap = {} # so that clients that expect this to exist in a cmap table won't fail.
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uvsDict = {}
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recOffset = 0
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for n in range(self.numVarSelectorRecords):
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uvs, defOVSOffset, nonDefUVSOffset = struct.unpack(">3sLL", data[recOffset:recOffset +11])
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recOffset += 11
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varUVS = cvtToUVS(uvs)
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if defOVSOffset:
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startOffset = defOVSOffset - 10
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numValues, = struct.unpack(">L", data[startOffset:startOffset+4])
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startOffset +=4
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for r in range(numValues):
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uv, addtlCnt = struct.unpack(">3sB", data[startOffset:startOffset+4])
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startOffset += 4
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firstBaseUV = cvtToUVS(uv)
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cnt = addtlCnt+1
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baseUVList = range(firstBaseUV, firstBaseUV+cnt)
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glyphList = [None]*cnt
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localUVList = zip(baseUVList, glyphList)
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try:
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uvsDict[varUVS].extend(localUVList)
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except KeyError:
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uvsDict[varUVS] = localUVList
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if nonDefUVSOffset:
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startOffset = nonDefUVSOffset - 10
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numRecs, = struct.unpack(">L", data[startOffset:startOffset+4])
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startOffset +=4
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localUVList = []
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for r in range(numRecs):
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uv, gid = struct.unpack(">3sH", data[startOffset:startOffset+5])
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startOffset += 5
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uv = cvtToUVS(uv)
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glyphName = self.ttFont.getGlyphName(gid)
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localUVList.append( [uv, glyphName] )
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try:
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uvsDict[varUVS].extend(localUVList)
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except KeyError:
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uvsDict[varUVS] = localUVList
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self.uvsDict = uvsDict
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def toXML(self, writer, ttFont):
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writer.begintag(self.__class__.__name__, [
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("platformID", self.platformID),
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("platEncID", self.platEncID),
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("format", self.format),
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("length", self.length),
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("numVarSelectorRecords", self.numVarSelectorRecords),
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])
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writer.newline()
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uvsDict = self.uvsDict
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uvsList = uvsDict.keys()
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uvsList.sort()
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for uvs in uvsList:
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uvList = uvsDict[uvs]
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uvList.sort(cmpUVSListEntry)
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for uv, gname in uvList:
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if gname == None:
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gname = "None"
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# I use the arg rather than th keyword syntax in order to preserve the attribute order.
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writer.simpletag("map", [ ("uvs",hex(uvs)), ("uv",hex(uv)), ("name", gname)] )
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writer.newline()
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writer.endtag(self.__class__.__name__)
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writer.newline()
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def fromXML(self, (name, attrs, content), ttFont):
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self.format = safeEval(attrs["format"])
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self.length = safeEval(attrs["length"])
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self.numVarSelectorRecords = safeEval(attrs["numVarSelectorRecords"])
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self.language = 0xFF # provide a value so that CmapSubtable.__cmp__() won't fail
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if not hasattr(self, "cmap"):
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self.cmap = {} # so that clients that expect this to exist in a cmap table won't fail.
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if not hasattr(self, "uvsDict"):
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self.uvsDict = {}
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uvsDict = self.uvsDict
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for element in content:
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if type(element) <> TupleType:
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continue
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name, attrs, content = element
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if name <> "map":
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continue
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uvs = safeEval(attrs["uvs"])
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uv = safeEval(attrs["uv"])
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gname = attrs["name"]
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if gname == "None":
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gname = None
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try:
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uvsDict[uvs].append( [uv, gname])
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except KeyError:
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uvsDict[uvs] = [ [uv, gname] ]
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def compile(self, ttFont):
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if self.data:
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return struct.pack(">HLL", self.format, self.length , self.numVarSelectorRecords) + self.data
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uvsDict = self.uvsDict
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uvsList = uvsDict.keys()
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uvsList.sort()
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self.numVarSelectorRecords = len(uvsList)
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offset = 10 + self.numVarSelectorRecords*11 # current value is end of VarSelectorRecords block.
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data = []
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varSelectorRecords =[]
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for uvs in uvsList:
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entryList = uvsDict[uvs]
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defList = filter(lambda entry: entry[1] == None, entryList)
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if defList:
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defList = map(lambda entry: entry[0], defList)
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defOVSOffset = offset
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defList.sort()
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lastUV = defList[0]
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cnt = -1
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defRecs = []
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for defEntry in defList:
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cnt +=1
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if (lastUV+cnt) != defEntry:
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rec = struct.pack(">3sB", cvtFromUVS(lastUV), cnt-1)
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lastUV = defEntry
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defRecs.append(rec)
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cnt = 0
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rec = struct.pack(">3sB", cvtFromUVS(lastUV), cnt)
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defRecs.append(rec)
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numDefRecs = len(defRecs)
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data.append(struct.pack(">L", numDefRecs))
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data.extend(defRecs)
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offset += 4 + numDefRecs*4
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else:
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defOVSOffset = 0
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ndefList = filter(lambda entry: entry[1] != None, entryList)
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if ndefList:
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nonDefUVSOffset = offset
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ndefList.sort()
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numNonDefRecs = len(ndefList)
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data.append(struct.pack(">L", numNonDefRecs))
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offset += 4 + numNonDefRecs*5
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for uv, gname in ndefList:
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gid = ttFont.getGlyphID(gname)
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ndrec = struct.pack(">3sH", cvtFromUVS(uv), gid)
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data.append(ndrec)
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else:
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nonDefUVSOffset = 0
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vrec = struct.pack(">3sLL", cvtFromUVS(uvs), defOVSOffset, nonDefUVSOffset)
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varSelectorRecords.append(vrec)
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data = "".join(varSelectorRecords) + "".join(data)
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self.length = 10 + len(data)
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headerdata = struct.pack(">HLL", self.format, self.length , self.numVarSelectorRecords)
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self.data = headerdata + data
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return self.data
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class cmap_format_unknown(CmapSubtable):
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def toXML(self, writer, ttFont):
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@ -1080,4 +1291,5 @@ cmap_classes = {
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4: cmap_format_4,
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6: cmap_format_6,
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12: cmap_format_12,
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14: cmap_format_14,
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}
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