767102ea85
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@243 4cde692c-a291-49d1-8350-778aa11640f8
588 lines
20 KiB
Python
588 lines
20 KiB
Python
"""cffLib.py -- read/write tools for Adobe CFF fonts."""
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#
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# $Id: cffLib.py,v 1.15 2002-05-17 07:06:32 jvr Exp $
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#
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import struct, sstruct
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import string
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import types
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from fontTools.misc import psCharStrings
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DEBUG = 0
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cffHeaderFormat = """
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major: B
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minor: B
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hdrSize: B
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offSize: B
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"""
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class CFFFontSet:
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def __init__(self):
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pass
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def decompile(self, file):
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sstruct.unpack(cffHeaderFormat, file.read(4), self)
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assert self.major == 1 and self.minor == 0, \
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"unknown CFF format: %d.%d" % (self.major, self.minor)
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self.fontNames = list(Index(file, "fontNames"))
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self.topDictIndex = TopDictIndex(file)
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self.strings = IndexedStrings(file)
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self.GlobalSubrs = CharStringIndex(file, "GlobalSubrsIndex")
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self.topDictIndex.strings = self.strings
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self.topDictIndex.GlobalSubrs = self.GlobalSubrs
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def __len__(self):
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return len(self.fontNames)
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def keys(self):
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return self.fontNames[:]
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def values(self):
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return self.topDictIndex
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def __getitem__(self, name):
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try:
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index = self.fontNames.index(name)
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except ValueError:
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raise KeyError, name
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return self.topDictIndex[index]
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def compile(self):
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strings = IndexedStrings()
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XXXX
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def toXML(self, xmlWriter, progress=None):
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xmlWriter.newline()
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for fontName in self.fontNames:
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xmlWriter.begintag("CFFFont", name=fontName)
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xmlWriter.newline()
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font = self[fontName]
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font.toXML(xmlWriter, progress)
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xmlWriter.endtag("CFFFont")
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xmlWriter.newline()
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xmlWriter.newline()
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xmlWriter.begintag("GlobalSubrs")
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xmlWriter.newline()
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self.GlobalSubrs.toXML(xmlWriter, progress)
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xmlWriter.endtag("GlobalSubrs")
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xmlWriter.newline()
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xmlWriter.newline()
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def fromXML(self, (name, attrs, content)):
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xxx
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class Index:
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"""This class represents what the CFF spec calls an INDEX."""
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def __init__(self, file, name=None):
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if name is None:
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name = self.__class__.__name__
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if DEBUG:
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print "loading %s at %s" % (name, file.tell())
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self.file = file
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count, = struct.unpack(">H", file.read(2))
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self.count = count
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self.items = [None] * count
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if count == 0:
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self.offsets = []
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return
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offSize = ord(file.read(1))
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if DEBUG:
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print "index count: %s offSize: %s" % (count, offSize)
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assert offSize <= 4, "offSize too large: %s" % offSize
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self.offsets = offsets = []
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pad = '\0' * (4 - offSize)
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for index in range(count+1):
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chunk = file.read(offSize)
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chunk = pad + chunk
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offset, = struct.unpack(">L", chunk)
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offsets.append(int(offset))
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self.offsetBase = file.tell() - 1
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file.seek(self.offsetBase + offsets[-1]) # pretend we've read the whole lot
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def __len__(self):
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return self.count
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def __getitem__(self, index):
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item = self.items[index]
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if item is not None:
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return item
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offset = self.offsets[index] + self.offsetBase
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size = self.offsets[index+1] - self.offsets[index]
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file = self.file
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file.seek(offset)
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data = file.read(size)
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assert len(data) == size
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item = self.produceItem(data, file, offset, size)
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self.items[index] = item
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return item
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def produceItem(self, data, file, offset, size):
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return data
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class CharStringIndex(Index):
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def produceItem(self, data, file, offset, size):
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return psCharStrings.T2CharString(data)
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def toXML(self, xmlWriter, progress):
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for i in range(len(self)):
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xmlWriter.begintag("CharString", index=i)
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xmlWriter.newline()
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self[i].toXML(xmlWriter)
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xmlWriter.endtag("CharString")
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xmlWriter.newline()
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class TopDictIndex(Index):
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def produceItem(self, data, file, offset, size):
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top = TopDict(self.strings, file, offset, self.GlobalSubrs)
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top.decompile(data)
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return top
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class CharStrings:
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def __init__(self, file, charset):
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self.charStringsIndex = CharStringIndex(file)
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self.nameToIndex = nameToIndex = {}
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for i in range(len(charset)):
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nameToIndex[charset[i]] = i
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def keys(self):
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return self.nameToIndex.keys()
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def values(self):
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return self.charStringsIndex
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def has_key(self, name):
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return self.nameToIndex.has_key(name)
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def __len__(self):
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return len(self.charStringsIndex)
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def __getitem__(self, name):
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index = self.nameToIndex[name]
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return self.charStringsIndex[index]
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def toXML(self, xmlWriter, progress):
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names = self.keys()
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names.sort()
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for name in names:
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xmlWriter.begintag("CharString", name=name)
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xmlWriter.newline()
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self[name].toXML(xmlWriter)
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xmlWriter.endtag("CharString")
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xmlWriter.newline()
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def buildOperatorDict(table):
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d = {}
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for op, name, arg, default, conv in table:
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d[op] = (name, arg)
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return d
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def buildOrder(table):
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l = []
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for op, name, arg, default, conv in table:
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l.append(name)
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return l
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def buildDefaults(table):
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d = {}
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for op, name, arg, default, conv in table:
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if default is not None:
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d[name] = default
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return d
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def buildConverters(table):
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d = {}
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for op, name, arg, default, conv in table:
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d[name] = conv
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return d
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class PrivateDictConverter:
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def read(self, parent, value):
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size, offset = value
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file = parent.file
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pr = PrivateDict(parent.strings, file, offset)
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file.seek(offset)
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data = file.read(size)
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len(data) == size
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pr.decompile(data)
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return pr
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def xmlWrite(self, xmlWriter, name, value):
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xmlWriter.begintag(name)
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xmlWriter.newline()
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value.toXML(xmlWriter, None)
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xmlWriter.endtag(name)
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xmlWriter.newline()
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class SubrsConverter(PrivateDictConverter):
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def read(self, parent, value):
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file = parent.file
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file.seek(parent.offset + value) # Offset(self)
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return CharStringIndex(file, "SubrsIndex")
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class CharStringsConverter(PrivateDictConverter):
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def read(self, parent, value):
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file = parent.file
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charset = parent.charset
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file.seek(value) # Offset(0)
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return CharStrings(file, charset)
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class CharsetConverter:
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def read(self, parent, value):
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isCID = hasattr(parent, "ROS")
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if value > 2:
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numGlyphs = parent.numGlyphs
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file = parent.file
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file.seek(value)
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format = ord(file.read(1))
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if format == 0:
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raise NotImplementedError
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elif format == 1 or format == 2:
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charset = parseCharset(numGlyphs, file, parent.strings, isCID, format)
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elif format == 3:
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raise NotImplementedError
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else:
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raise NotImplementedError
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assert len(charset) == numGlyphs
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else:
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if isCID:
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assert value == 0
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charset = None
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elif value == 0:
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charset = ISOAdobe
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elif value == 1:
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charset = Expert
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elif value == 2:
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charset = ExpertSubset
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# self.charset:
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# 0: ISOAdobe (or CID font!)
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# 1: Expert
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# 2: ExpertSubset
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charset = None #
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return charset
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def xmlWrite(self, xmlWriter, name, value):
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# XXX GlyphOrder needs to be stored *somewhere*, but not here...
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xmlWriter.simpletag("charset", value=value)
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xmlWriter.newline()
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def parseCharset(numGlyphs, file, strings, isCID, format):
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charset = ['.notdef']
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count = 1
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if format == 1:
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def nLeftFunc(file):
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return ord(file.read(1))
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else:
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def nLeftFunc(file):
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return struct.unpack(">H", file.read(2))[0]
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while count < numGlyphs:
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first, = struct.unpack(">H", file.read(2))
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nLeft = nLeftFunc(file)
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if isCID:
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for CID in range(first, first+nLeft+1):
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charset.append(CID)
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else:
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for SID in range(first, first+nLeft+1):
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charset.append(strings[SID])
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count = count + nLeft + 1
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return charset
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topDictOperators = [
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# opcode name argument type default converter
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(0, 'version', 'SID', None, None),
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(1, 'Notice', 'SID', None, None),
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((12, 0), 'Copyright', 'SID', None, None),
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(2, 'FullName', 'SID', None, None),
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(3, 'FamilyName', 'SID', None, None),
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(4, 'Weight', 'SID', None, None),
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((12, 1), 'isFixedPitch', 'number', 0, None),
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((12, 2), 'ItalicAngle', 'number', 0, None),
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((12, 3), 'UnderlinePosition', 'number', None, None),
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((12, 4), 'UnderlineThickness', 'number', 50, None),
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((12, 5), 'PaintType', 'number', 0, None),
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((12, 6), 'CharstringType', 'number', 2, None),
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((12, 7), 'FontMatrix', 'array', [0.001,0,0,0.001,0,0], None),
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(13, 'UniqueID', 'number', None, None),
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(5, 'FontBBox', 'array', [0,0,0,0], None),
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((12, 8), 'StrokeWidth', 'number', 0, None),
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(14, 'XUID', 'array', None, None),
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(15, 'charset', 'number', 0, CharsetConverter()),
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(16, 'Encoding', 'number', 0, None),
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(18, 'Private', ('number','number'), None, PrivateDictConverter()),
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(17, 'CharStrings', 'number', None, CharStringsConverter()), # XXX
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((12, 20), 'SyntheticBase', 'number', None, None),
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((12, 21), 'PostScript', 'SID', None, None),
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((12, 22), 'BaseFontName', 'SID', None, None),
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((12, 23), 'BaseFontBlend', 'delta', None, None),
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((12, 30), 'ROS', ('SID','SID','number'), None, None),
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((12, 31), 'CIDFontVersion', 'number', 0, None),
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((12, 32), 'CIDFontRevision', 'number', 0, None),
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((12, 33), 'CIDFontType', 'number', 0, None),
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((12, 34), 'CIDCount', 'number', 8720, None),
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((12, 35), 'UIDBase', 'number', None, None),
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((12, 36), 'FDArray', 'number', None, None),
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((12, 37), 'FDSelect', 'number', None, None),
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((12, 38), 'FontName', 'SID', None, None),
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]
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privateDictOperators = [
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# opcode name argument type default converter
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(6, 'BlueValues', 'delta', None, None),
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(7, 'OtherBlues', 'delta', None, None),
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(8, 'FamilyBlues', 'delta', None, None),
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(9, 'FamilyOtherBlues', 'delta', None, None),
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((12, 9), 'BlueScale', 'number', 0.039625, None),
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((12, 10), 'BlueShift', 'number', 7, None),
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((12, 11), 'BlueFuzz', 'number', 1, None),
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(10, 'StdHW', 'number', None, None),
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(11, 'StdVW', 'number', None, None),
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((12, 12), 'StemSnapH', 'delta', None, None),
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((12, 13), 'StemSnapV', 'delta', None, None),
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((12, 14), 'ForceBold', 'number', 0, None),
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((12, 17), 'LanguageGroup', 'number', 0, None),
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((12, 18), 'ExpansionFactor', 'number', 0.06, None),
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((12, 19), 'initialRandomSeed', 'number', 0, None),
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(20, 'defaultWidthX', 'number', 0, None),
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(21, 'nominalWidthX', 'number', 0, None),
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(19, 'Subrs', 'number', None, SubrsConverter()),
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]
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class TopDictDecompiler(psCharStrings.DictDecompiler):
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operators = buildOperatorDict(topDictOperators)
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class PrivateDictDecompiler(psCharStrings.DictDecompiler):
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operators = buildOperatorDict(privateDictOperators)
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class BaseDict:
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def __init__(self, strings, file, offset):
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self.rawDict = {}
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if DEBUG:
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print "loading %s at %s" % (self, offset)
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self.file = file
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self.offset = offset
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self.strings = strings
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def decompile(self, data):
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dec = self.decompiler(self.strings)
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dec.decompile(data)
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self.rawDict = dec.getDict()
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self.postDecompile()
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def postDecompile(self):
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pass
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def __getattr__(self, name):
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value = self.rawDict.get(name)
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if value is None:
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value = self.defaults.get(name)
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if value is None:
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raise AttributeError, name
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conv = self.converters[name]
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if conv is not None:
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value = conv.read(self, value)
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setattr(self, name, value)
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return value
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def toXML(self, xmlWriter, progress):
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for name in self.order:
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value = getattr(self, name, None)
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if value is None:
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continue
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conv = self.converters.get(name)
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if conv is not None:
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conv.xmlWrite(xmlWriter, name, value)
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else:
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if isinstance(value, types.ListType):
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value = " ".join(map(str, value))
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xmlWriter.simpletag(name, value=value)
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xmlWriter.newline()
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class TopDict(BaseDict):
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defaults = buildDefaults(topDictOperators)
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converters = buildConverters(topDictOperators)
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order = buildOrder(topDictOperators)
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decompiler = TopDictDecompiler
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def __init__(self, strings, file, offset, GlobalSubrs):
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BaseDict.__init__(self, strings, file, offset)
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self.GlobalSubrs = GlobalSubrs
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def getGlyphOrder(self):
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return self.charset
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def postDecompile(self):
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offset = self.rawDict.get("CharStrings")
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if offset is None:
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return
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# get the number of glyphs beforehand.
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self.file.seek(offset)
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self.numGlyphs, = struct.unpack(">H", self.file.read(2))
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def toXML(self, xmlWriter, progress):
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self.decompileAllCharStrings()
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BaseDict.toXML(self, xmlWriter, progress)
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def decompileAllCharStrings(self):
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if self.CharstringType == 2:
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# Type 2 CharStrings
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if hasattr(self.Private, "Subrs"):
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Subrs = self.Private.Subrs
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else:
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Subrs = []
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decompiler = psCharStrings.SimpleT2Decompiler(Subrs, self.GlobalSubrs)
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for charString in self.CharStrings.values():
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if charString.needsDecompilation():
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decompiler.reset()
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decompiler.execute(charString)
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charString.compile()
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else:
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# Type 1 CharStrings
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for charString in self.CharStrings.values():
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charString.decompile()
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class PrivateDict(BaseDict):
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defaults = buildDefaults(privateDictOperators)
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converters = buildConverters(privateDictOperators)
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order = buildOrder(privateDictOperators)
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decompiler = PrivateDictDecompiler
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class IndexedStrings:
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"""SID -> string mapping."""
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def __init__(self, file=None):
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if file is None:
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strings = []
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else:
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strings = list(Index(file, "IndexedStrings"))
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self.strings = strings
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def __getitem__(self, SID):
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if SID < cffStandardStringCount:
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return cffStandardStrings[SID]
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else:
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return self.strings[SID - cffStandardStringCount]
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def getSID(self, s):
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if not hasattr(self, "stringMapping"):
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self.buildStringMapping()
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if cffStandardStringMapping.has_key(s):
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SID = cffStandardStringMapping[s]
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if self.stringMapping.has_key(s):
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SID = self.stringMapping[s]
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else:
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SID = len(self.strings) + cffStandardStringCount
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self.strings.append(s)
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self.stringMapping[s] = SID
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return SID
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def getStrings(self):
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return self.strings
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def buildStringMapping(self):
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self.stringMapping = {}
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for index in range(len(self.strings)):
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self.stringMapping[self.strings[index]] = index + cffStandardStringCount
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# The 391 Standard Strings as used in the CFF format.
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# from Adobe Technical None #5176, version 1.0, 18 March 1998
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cffStandardStrings = ['.notdef', 'space', 'exclam', 'quotedbl', 'numbersign',
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'dollar', 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright',
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'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', 'one',
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'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'colon',
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'semicolon', 'less', 'equal', 'greater', 'question', 'at', 'A', 'B', 'C',
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'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
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'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'bracketleft', 'backslash',
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|
'bracketright', 'asciicircum', 'underscore', 'quoteleft', 'a', 'b', 'c',
|
|
'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
|
|
's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'braceleft', 'bar', 'braceright',
|
|
'asciitilde', 'exclamdown', 'cent', 'sterling', 'fraction', 'yen', 'florin',
|
|
'section', 'currency', 'quotesingle', 'quotedblleft', 'guillemotleft',
|
|
'guilsinglleft', 'guilsinglright', 'fi', 'fl', 'endash', 'dagger',
|
|
'daggerdbl', 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase',
|
|
'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', 'perthousand',
|
|
'questiondown', 'grave', 'acute', 'circumflex', 'tilde', 'macron', 'breve',
|
|
'dotaccent', 'dieresis', 'ring', 'cedilla', 'hungarumlaut', 'ogonek', 'caron',
|
|
'emdash', 'AE', 'ordfeminine', 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae',
|
|
'dotlessi', 'lslash', 'oslash', 'oe', 'germandbls', 'onesuperior',
|
|
'logicalnot', 'mu', 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn',
|
|
'onequarter', 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters',
|
|
'twosuperior', 'registered', 'minus', 'eth', 'multiply', 'threesuperior',
|
|
'copyright', 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring',
|
|
'Atilde', 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave',
|
|
'Iacute', 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute',
|
|
'Ocircumflex', 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute',
|
|
'Ucircumflex', 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron',
|
|
'aacute', 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla',
|
|
'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex',
|
|
'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis',
|
|
'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', 'ugrave',
|
|
'yacute', 'ydieresis', 'zcaron', 'exclamsmall', 'Hungarumlautsmall',
|
|
'dollaroldstyle', 'dollarsuperior', 'ampersandsmall', 'Acutesmall',
|
|
'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', 'onedotenleader',
|
|
'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', 'fouroldstyle',
|
|
'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle',
|
|
'nineoldstyle', 'commasuperior', 'threequartersemdash', 'periodsuperior',
|
|
'questionsmall', 'asuperior', 'bsuperior', 'centsuperior', 'dsuperior',
|
|
'esuperior', 'isuperior', 'lsuperior', 'msuperior', 'nsuperior', 'osuperior',
|
|
'rsuperior', 'ssuperior', 'tsuperior', 'ff', 'ffi', 'ffl', 'parenleftinferior',
|
|
'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall',
|
|
'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', 'Hsmall',
|
|
'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', 'Osmall', 'Psmall',
|
|
'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', 'Vsmall', 'Wsmall', 'Xsmall',
|
|
'Ysmall', 'Zsmall', 'colonmonetary', 'onefitted', 'rupiah', 'Tildesmall',
|
|
'exclamdownsmall', 'centoldstyle', 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall',
|
|
'Dieresissmall', 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall',
|
|
'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', 'Cedillasmall',
|
|
'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', 'seveneighths',
|
|
'onethird', 'twothirds', 'zerosuperior', 'foursuperior', 'fivesuperior',
|
|
'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', 'zeroinferior',
|
|
'oneinferior', 'twoinferior', 'threeinferior', 'fourinferior', 'fiveinferior',
|
|
'sixinferior', 'seveninferior', 'eightinferior', 'nineinferior', 'centinferior',
|
|
'dollarinferior', 'periodinferior', 'commainferior', 'Agravesmall',
|
|
'Aacutesmall', 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall',
|
|
'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', 'Ecircumflexsmall',
|
|
'Edieresissmall', 'Igravesmall', 'Iacutesmall', 'Icircumflexsmall',
|
|
'Idieresissmall', 'Ethsmall', 'Ntildesmall', 'Ogravesmall', 'Oacutesmall',
|
|
'Ocircumflexsmall', 'Otildesmall', 'Odieresissmall', 'OEsmall', 'Oslashsmall',
|
|
'Ugravesmall', 'Uacutesmall', 'Ucircumflexsmall', 'Udieresissmall',
|
|
'Yacutesmall', 'Thornsmall', 'Ydieresissmall', '001.000', '001.001', '001.002',
|
|
'001.003', 'Black', 'Bold', 'Book', 'Light', 'Medium', 'Regular', 'Roman',
|
|
'Semibold'
|
|
]
|
|
|
|
cffStandardStringCount = 391
|
|
assert len(cffStandardStrings) == cffStandardStringCount
|
|
# build reverse mapping
|
|
cffStandardStringMapping = {}
|
|
for _i in range(cffStandardStringCount):
|
|
cffStandardStringMapping[cffStandardStrings[_i]] = _i
|
|
|
|
|