Source code for fontTools.cffLib

"""cffLib: read/write Adobe CFF fonts

OpenType fonts with PostScript outlines contain a completely independent
font file, Adobe's *Compact Font Format*. So dealing with OpenType fonts
requires also dealing with CFF. This module allows you to read and write
fonts written in the CFF format.

In 2016, OpenType 1.8 introduced the `CFF2 <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2>`_
format which, along with other changes, extended the CFF format to deal with
the demands of variable fonts. This module parses both original CFF and CFF2.

"""

from fontTools.misc import sstruct
from fontTools.misc import psCharStrings
from fontTools.misc.arrayTools import unionRect, intRect
from fontTools.misc.textTools import bytechr, byteord, bytesjoin, tobytes, tostr, safeEval
from fontTools.ttLib import TTFont
from fontTools.ttLib.tables.otBase import OTTableWriter
from fontTools.ttLib.tables.otBase import OTTableReader
from fontTools.ttLib.tables import otTables as ot
from io import BytesIO
import struct
import logging
import re

# mute cffLib debug messages when running ttx in verbose mode
DEBUG = logging.DEBUG - 1
log = logging.getLogger(__name__)

cffHeaderFormat = """
	major:   B
	minor:   B
	hdrSize: B
"""

maxStackLimit = 513
# maxstack operator has been deprecated. max stack is now always 513.


[docs]class StopHintCountEvent(Exception): pass
class _DesubroutinizingT2Decompiler(psCharStrings.SimpleT2Decompiler): stop_hintcount_ops = ("op_hintmask", "op_cntrmask", "op_rmoveto", "op_hmoveto", "op_vmoveto") def __init__(self, localSubrs, globalSubrs, private=None): psCharStrings.SimpleT2Decompiler.__init__(self, localSubrs, globalSubrs, private) def execute(self, charString): self.need_hintcount = True # until proven otherwise for op_name in self.stop_hintcount_ops: setattr(self, op_name, self.stop_hint_count) if hasattr(charString, '_desubroutinized'): # If a charstring has already been desubroutinized, we will still # need to execute it if we need to count hints in order to # compute the byte length for mask arguments, and haven't finished # counting hints pairs. if self.need_hintcount and self.callingStack: try: psCharStrings.SimpleT2Decompiler.execute(self, charString) except StopHintCountEvent: del self.callingStack[-1] return charString._patches = [] psCharStrings.SimpleT2Decompiler.execute(self, charString) desubroutinized = charString.program[:] for idx, expansion in reversed(charString._patches): assert idx >= 2 assert desubroutinized[idx - 1] in ['callsubr', 'callgsubr'], desubroutinized[idx - 1] assert type(desubroutinized[idx - 2]) == int if expansion[-1] == 'return': expansion = expansion[:-1] desubroutinized[idx-2:idx] = expansion if not self.private.in_cff2: if 'endchar' in desubroutinized: # Cut off after first endchar desubroutinized = desubroutinized[:desubroutinized.index('endchar') + 1] else: if not len(desubroutinized) or desubroutinized[-1] != 'return': desubroutinized.append('return') charString._desubroutinized = desubroutinized del charString._patches def op_callsubr(self, index): subr = self.localSubrs[self.operandStack[-1]+self.localBias] psCharStrings.SimpleT2Decompiler.op_callsubr(self, index) self.processSubr(index, subr) def op_callgsubr(self, index): subr = self.globalSubrs[self.operandStack[-1]+self.globalBias] psCharStrings.SimpleT2Decompiler.op_callgsubr(self, index) self.processSubr(index, subr) def stop_hint_count(self, *args): self.need_hintcount = False for op_name in self.stop_hintcount_ops: setattr(self, op_name, None) cs = self.callingStack[-1] if hasattr(cs, '_desubroutinized'): raise StopHintCountEvent() def op_hintmask(self, index): psCharStrings.SimpleT2Decompiler.op_hintmask(self, index) if self.need_hintcount: self.stop_hint_count() def processSubr(self, index, subr): cs = self.callingStack[-1] if not hasattr(cs, '_desubroutinized'): cs._patches.append((index, subr._desubroutinized))
[docs]class CFFFontSet(object): """A CFF font "file" can contain more than one font, although this is extremely rare (and not allowed within OpenType fonts). This class is the entry point for parsing a CFF table. To actually manipulate the data inside the CFF font, you will want to access the ``CFFFontSet``'s :class:`TopDict` object. To do this, a ``CFFFontSet`` object can either be treated as a dictionary (with appropriate ``keys()`` and ``values()`` methods) mapping font names to :class:`TopDict` objects, or as a list. .. code:: python from fontTools import ttLib tt = ttLib.TTFont("Tests/cffLib/data/LinLibertine_RBI.otf") tt["CFF "].cff # <fontTools.cffLib.CFFFontSet object at 0x101e24c90> tt["CFF "].cff[0] # Here's your actual font data # <fontTools.cffLib.TopDict object at 0x1020f1fd0> """
[docs] def decompile(self, file, otFont, isCFF2=None): """Parse a binary CFF file into an internal representation. ``file`` should be a file handle object. ``otFont`` is the top-level :py:class:`fontTools.ttLib.ttFont.TTFont` object containing this CFF file. If ``isCFF2`` is passed and set to ``True`` or ``False``, then the library makes an assertion that the CFF header is of the appropriate version. """ self.otFont = otFont sstruct.unpack(cffHeaderFormat, file.read(3), self) if isCFF2 is not None: # called from ttLib: assert 'major' as read from file matches the # expected version expected_major = (2 if isCFF2 else 1) if self.major != expected_major: raise ValueError( "Invalid CFF 'major' version: expected %d, found %d" % (expected_major, self.major)) else: # use 'major' version from file to determine if isCFF2 assert self.major in (1, 2), "Unknown CFF format" isCFF2 = self.major == 2 if not isCFF2: self.offSize = struct.unpack("B", file.read(1))[0] file.seek(self.hdrSize) self.fontNames = list(tostr(s) for s in Index(file, isCFF2=isCFF2)) self.topDictIndex = TopDictIndex(file, isCFF2=isCFF2) self.strings = IndexedStrings(file) else: # isCFF2 self.topDictSize = struct.unpack(">H", file.read(2))[0] file.seek(self.hdrSize) self.fontNames = ["CFF2Font"] cff2GetGlyphOrder = otFont.getGlyphOrder # in CFF2, offsetSize is the size of the TopDict data. self.topDictIndex = TopDictIndex( file, cff2GetGlyphOrder, self.topDictSize, isCFF2=isCFF2) self.strings = None self.GlobalSubrs = GlobalSubrsIndex(file, isCFF2=isCFF2) self.topDictIndex.strings = self.strings self.topDictIndex.GlobalSubrs = self.GlobalSubrs
def __len__(self): return len(self.fontNames) def keys(self): return list(self.fontNames) def values(self): return self.topDictIndex def __getitem__(self, nameOrIndex): """ Return TopDict instance identified by name (str) or index (int or any object that implements `__index__`). """ if hasattr(nameOrIndex, "__index__"): index = nameOrIndex.__index__() elif isinstance(nameOrIndex, str): name = nameOrIndex try: index = self.fontNames.index(name) except ValueError: raise KeyError(nameOrIndex) else: raise TypeError(nameOrIndex) return self.topDictIndex[index]
[docs] def compile(self, file, otFont, isCFF2=None): """Write the object back into binary representation onto the given file. ``file`` should be a file handle object. ``otFont`` is the top-level :py:class:`fontTools.ttLib.ttFont.TTFont` object containing this CFF file. If ``isCFF2`` is passed and set to ``True`` or ``False``, then the library makes an assertion that the CFF header is of the appropriate version. """ self.otFont = otFont if isCFF2 is not None: # called from ttLib: assert 'major' value matches expected version expected_major = (2 if isCFF2 else 1) if self.major != expected_major: raise ValueError( "Invalid CFF 'major' version: expected %d, found %d" % (expected_major, self.major)) else: # use current 'major' value to determine output format assert self.major in (1, 2), "Unknown CFF format" isCFF2 = self.major == 2 if otFont.recalcBBoxes and not isCFF2: for topDict in self.topDictIndex: topDict.recalcFontBBox() if not isCFF2: strings = IndexedStrings() else: strings = None writer = CFFWriter(isCFF2) topCompiler = self.topDictIndex.getCompiler(strings, self, isCFF2=isCFF2) if isCFF2: self.hdrSize = 5 writer.add(sstruct.pack(cffHeaderFormat, self)) # Note: topDictSize will most likely change in CFFWriter.toFile(). self.topDictSize = topCompiler.getDataLength() writer.add(struct.pack(">H", self.topDictSize)) else: self.hdrSize = 4 self.offSize = 4 # will most likely change in CFFWriter.toFile(). writer.add(sstruct.pack(cffHeaderFormat, self)) writer.add(struct.pack("B", self.offSize)) if not isCFF2: fontNames = Index() for name in self.fontNames: fontNames.append(name) writer.add(fontNames.getCompiler(strings, self, isCFF2=isCFF2)) writer.add(topCompiler) if not isCFF2: writer.add(strings.getCompiler()) writer.add(self.GlobalSubrs.getCompiler(strings, self, isCFF2=isCFF2)) for topDict in self.topDictIndex: if not hasattr(topDict, "charset") or topDict.charset is None: charset = otFont.getGlyphOrder() topDict.charset = charset children = topCompiler.getChildren(strings) for child in children: writer.add(child) writer.toFile(file)
[docs] def toXML(self, xmlWriter): """Write the object into XML representation onto the given :class:`fontTools.misc.xmlWriter.XMLWriter`. .. code:: python writer = xmlWriter.XMLWriter(sys.stdout) tt["CFF "].cff.toXML(writer) """ xmlWriter.simpletag("major", value=self.major) xmlWriter.newline() xmlWriter.simpletag("minor", value=self.minor) xmlWriter.newline() for fontName in self.fontNames: xmlWriter.begintag("CFFFont", name=tostr(fontName)) xmlWriter.newline() font = self[fontName] font.toXML(xmlWriter) xmlWriter.endtag("CFFFont") xmlWriter.newline() xmlWriter.newline() xmlWriter.begintag("GlobalSubrs") xmlWriter.newline() self.GlobalSubrs.toXML(xmlWriter) xmlWriter.endtag("GlobalSubrs") xmlWriter.newline()
[docs] def fromXML(self, name, attrs, content, otFont=None): """Reads data from the XML element into the ``CFFFontSet`` object.""" self.otFont = otFont # set defaults. These will be replaced if there are entries for them # in the XML file. if not hasattr(self, "major"): self.major = 1 if not hasattr(self, "minor"): self.minor = 0 if name == "CFFFont": if self.major == 1: if not hasattr(self, "offSize"): # this will be recalculated when the cff is compiled. self.offSize = 4 if not hasattr(self, "hdrSize"): self.hdrSize = 4 if not hasattr(self, "GlobalSubrs"): self.GlobalSubrs = GlobalSubrsIndex() if not hasattr(self, "fontNames"): self.fontNames = [] self.topDictIndex = TopDictIndex() fontName = attrs["name"] self.fontNames.append(fontName) topDict = TopDict(GlobalSubrs=self.GlobalSubrs) topDict.charset = None # gets filled in later elif self.major == 2: if not hasattr(self, "hdrSize"): self.hdrSize = 5 if not hasattr(self, "GlobalSubrs"): self.GlobalSubrs = GlobalSubrsIndex() if not hasattr(self, "fontNames"): self.fontNames = ["CFF2Font"] cff2GetGlyphOrder = self.otFont.getGlyphOrder topDict = TopDict( GlobalSubrs=self.GlobalSubrs, cff2GetGlyphOrder=cff2GetGlyphOrder) self.topDictIndex = TopDictIndex(None, cff2GetGlyphOrder) self.topDictIndex.append(topDict) for element in content: if isinstance(element, str): continue name, attrs, content = element topDict.fromXML(name, attrs, content) if hasattr(topDict, "VarStore") and topDict.FDArray[0].vstore is None: fdArray = topDict.FDArray for fontDict in fdArray: if hasattr(fontDict, "Private"): fontDict.Private.vstore = topDict.VarStore elif name == "GlobalSubrs": subrCharStringClass = psCharStrings.T2CharString if not hasattr(self, "GlobalSubrs"): self.GlobalSubrs = GlobalSubrsIndex() for element in content: if isinstance(element, str): continue name, attrs, content = element subr = subrCharStringClass() subr.fromXML(name, attrs, content) self.GlobalSubrs.append(subr) elif name == "major": self.major = int(attrs['value']) elif name == "minor": self.minor = int(attrs['value'])
[docs] def convertCFFToCFF2(self, otFont): """Converts this object from CFF format to CFF2 format. This conversion is done 'in-place'. The conversion cannot be reversed. This assumes a decompiled CFF table. (i.e. that the object has been filled via :meth:`decompile`.)""" self.major = 2 cff2GetGlyphOrder = self.otFont.getGlyphOrder topDictData = TopDictIndex(None, cff2GetGlyphOrder) topDictData.items = self.topDictIndex.items self.topDictIndex = topDictData topDict = topDictData[0] if hasattr(topDict, 'Private'): privateDict = topDict.Private else: privateDict = None opOrder = buildOrder(topDictOperators2) topDict.order = opOrder topDict.cff2GetGlyphOrder = cff2GetGlyphOrder for entry in topDictOperators: key = entry[1] if key not in opOrder: if key in topDict.rawDict: del topDict.rawDict[key] if hasattr(topDict, key): delattr(topDict, key) if not hasattr(topDict, "FDArray"): fdArray = topDict.FDArray = FDArrayIndex() fdArray.strings = None fdArray.GlobalSubrs = topDict.GlobalSubrs topDict.GlobalSubrs.fdArray = fdArray charStrings = topDict.CharStrings if charStrings.charStringsAreIndexed: charStrings.charStringsIndex.fdArray = fdArray else: charStrings.fdArray = fdArray fontDict = FontDict() fontDict.setCFF2(True) fdArray.append(fontDict) fontDict.Private = privateDict privateOpOrder = buildOrder(privateDictOperators2) for entry in privateDictOperators: key = entry[1] if key not in privateOpOrder: if key in privateDict.rawDict: # print "Removing private dict", key del privateDict.rawDict[key] if hasattr(privateDict, key): delattr(privateDict, key) # print "Removing privateDict attr", key else: # clean up the PrivateDicts in the fdArray fdArray = topDict.FDArray privateOpOrder = buildOrder(privateDictOperators2) for fontDict in fdArray: fontDict.setCFF2(True) for key in fontDict.rawDict.keys(): if key not in fontDict.order: del fontDict.rawDict[key] if hasattr(fontDict, key): delattr(fontDict, key) privateDict = fontDict.Private for entry in privateDictOperators: key = entry[1] if key not in privateOpOrder: if key in privateDict.rawDict: # print "Removing private dict", key del privateDict.rawDict[key] if hasattr(privateDict, key): delattr(privateDict, key) # print "Removing privateDict attr", key # At this point, the Subrs and Charstrings are all still T2Charstring class # easiest to fix this by compiling, then decompiling again file = BytesIO() self.compile(file, otFont, isCFF2=True) file.seek(0) self.decompile(file, otFont, isCFF2=True)
def desubroutinize(self): for fontName in self.fontNames: font = self[fontName] cs = font.CharStrings for g in font.charset: c, _ = cs.getItemAndSelector(g) c.decompile() subrs = getattr(c.private, "Subrs", []) decompiler = _DesubroutinizingT2Decompiler(subrs, c.globalSubrs, c.private) decompiler.execute(c) c.program = c._desubroutinized del c._desubroutinized # Delete all the local subrs if hasattr(font, 'FDArray'): for fd in font.FDArray: pd = fd.Private if hasattr(pd, 'Subrs'): del pd.Subrs if 'Subrs' in pd.rawDict: del pd.rawDict['Subrs'] else: pd = font.Private if hasattr(pd, 'Subrs'): del pd.Subrs if 'Subrs' in pd.rawDict: del pd.rawDict['Subrs'] # as well as the global subrs self.GlobalSubrs.clear()
[docs]class CFFWriter(object): """Helper class for serializing CFF data to binary. Used by :meth:`CFFFontSet.compile`.""" def __init__(self, isCFF2): self.data = [] self.isCFF2 = isCFF2 def add(self, table): self.data.append(table) def toFile(self, file): lastPosList = None count = 1 while True: log.log(DEBUG, "CFFWriter.toFile() iteration: %d", count) count = count + 1 pos = 0 posList = [pos] for item in self.data: if hasattr(item, "getDataLength"): endPos = pos + item.getDataLength() if isinstance(item, TopDictIndexCompiler) and item.isCFF2: self.topDictSize = item.getDataLength() else: endPos = pos + len(item) if hasattr(item, "setPos"): item.setPos(pos, endPos) pos = endPos posList.append(pos) if posList == lastPosList: break lastPosList = posList log.log(DEBUG, "CFFWriter.toFile() writing to file.") begin = file.tell() if self.isCFF2: self.data[1] = struct.pack(">H", self.topDictSize) else: self.offSize = calcOffSize(lastPosList[-1]) self.data[1] = struct.pack("B", self.offSize) posList = [0] for item in self.data: if hasattr(item, "toFile"): item.toFile(file) else: file.write(item) posList.append(file.tell() - begin) assert posList == lastPosList
def calcOffSize(largestOffset): if largestOffset < 0x100: offSize = 1 elif largestOffset < 0x10000: offSize = 2 elif largestOffset < 0x1000000: offSize = 3 else: offSize = 4 return offSize
[docs]class IndexCompiler(object): """Base class for writing CFF `INDEX data <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#5-index-data>`_ to binary.""" def __init__(self, items, strings, parent, isCFF2=None): if isCFF2 is None and hasattr(parent, "isCFF2"): isCFF2 = parent.isCFF2 assert isCFF2 is not None self.isCFF2 = isCFF2 self.items = self.getItems(items, strings) self.parent = parent def getItems(self, items, strings): return items def getOffsets(self): # An empty INDEX contains only the count field. if self.items: pos = 1 offsets = [pos] for item in self.items: if hasattr(item, "getDataLength"): pos = pos + item.getDataLength() else: pos = pos + len(item) offsets.append(pos) else: offsets = [] return offsets def getDataLength(self): if self.isCFF2: countSize = 4 else: countSize = 2 if self.items: lastOffset = self.getOffsets()[-1] offSize = calcOffSize(lastOffset) dataLength = ( countSize + # count 1 + # offSize (len(self.items) + 1) * offSize + # the offsets lastOffset - 1 # size of object data ) else: # count. For empty INDEX tables, this is the only entry. dataLength = countSize return dataLength def toFile(self, file): offsets = self.getOffsets() if self.isCFF2: writeCard32(file, len(self.items)) else: writeCard16(file, len(self.items)) # An empty INDEX contains only the count field. if self.items: offSize = calcOffSize(offsets[-1]) writeCard8(file, offSize) offSize = -offSize pack = struct.pack for offset in offsets: binOffset = pack(">l", offset)[offSize:] assert len(binOffset) == -offSize file.write(binOffset) for item in self.items: if hasattr(item, "toFile"): item.toFile(file) else: data = tobytes(item, encoding="latin1") file.write(data)
[docs]class IndexedStringsCompiler(IndexCompiler): def getItems(self, items, strings): return items.strings
[docs]class TopDictIndexCompiler(IndexCompiler): """Helper class for writing the TopDict to binary.""" def getItems(self, items, strings): out = [] for item in items: out.append(item.getCompiler(strings, self)) return out def getChildren(self, strings): children = [] for topDict in self.items: children.extend(topDict.getChildren(strings)) return children def getOffsets(self): if self.isCFF2: offsets = [0, self.items[0].getDataLength()] return offsets else: return super(TopDictIndexCompiler, self).getOffsets() def getDataLength(self): if self.isCFF2: dataLength = self.items[0].getDataLength() return dataLength else: return super(TopDictIndexCompiler, self).getDataLength() def toFile(self, file): if self.isCFF2: self.items[0].toFile(file) else: super(TopDictIndexCompiler, self).toFile(file)
[docs]class FDArrayIndexCompiler(IndexCompiler): """Helper class for writing the `Font DICT INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#10-font-dict-index-font-dicts-and-fdselect>`_ to binary.""" def getItems(self, items, strings): out = [] for item in items: out.append(item.getCompiler(strings, self)) return out def getChildren(self, strings): children = [] for fontDict in self.items: children.extend(fontDict.getChildren(strings)) return children def toFile(self, file): offsets = self.getOffsets() if self.isCFF2: writeCard32(file, len(self.items)) else: writeCard16(file, len(self.items)) offSize = calcOffSize(offsets[-1]) writeCard8(file, offSize) offSize = -offSize pack = struct.pack for offset in offsets: binOffset = pack(">l", offset)[offSize:] assert len(binOffset) == -offSize file.write(binOffset) for item in self.items: if hasattr(item, "toFile"): item.toFile(file) else: file.write(item) def setPos(self, pos, endPos): self.parent.rawDict["FDArray"] = pos
[docs]class GlobalSubrsCompiler(IndexCompiler): """Helper class for writing the `global subroutine INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#9-local-and-global-subr-indexes>`_ to binary.""" def getItems(self, items, strings): out = [] for cs in items: cs.compile(self.isCFF2) out.append(cs.bytecode) return out
[docs]class SubrsCompiler(GlobalSubrsCompiler): """Helper class for writing the `local subroutine INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#9-local-and-global-subr-indexes>`_ to binary.""" def setPos(self, pos, endPos): offset = pos - self.parent.pos self.parent.rawDict["Subrs"] = offset
[docs]class CharStringsCompiler(GlobalSubrsCompiler): """Helper class for writing the `CharStrings INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#9-local-and-global-subr-indexes>`_ to binary.""" def getItems(self, items, strings): out = [] for cs in items: cs.compile(self.isCFF2) out.append(cs.bytecode) return out def setPos(self, pos, endPos): self.parent.rawDict["CharStrings"] = pos
[docs]class Index(object): """This class represents what the CFF spec calls an INDEX (an array of variable-sized objects). `Index` items can be addressed and set using Python list indexing.""" compilerClass = IndexCompiler def __init__(self, file=None, isCFF2=None): assert (isCFF2 is None) == (file is None) self.items = [] name = self.__class__.__name__ if file is None: return self._isCFF2 = isCFF2 log.log(DEBUG, "loading %s at %s", name, file.tell()) self.file = file if isCFF2: count = readCard32(file) else: count = readCard16(file) if count == 0: return self.items = [None] * count offSize = readCard8(file) log.log(DEBUG, " index count: %s offSize: %s", count, offSize) assert offSize <= 4, "offSize too large: %s" % offSize self.offsets = offsets = [] pad = b'\0' * (4 - offSize) for index in range(count + 1): chunk = file.read(offSize) chunk = pad + chunk offset, = struct.unpack(">L", chunk) offsets.append(int(offset)) self.offsetBase = file.tell() - 1 file.seek(self.offsetBase + offsets[-1]) # pretend we've read the whole lot log.log(DEBUG, " end of %s at %s", name, file.tell()) def __len__(self): return len(self.items) def __getitem__(self, index): item = self.items[index] if item is not None: return item offset = self.offsets[index] + self.offsetBase size = self.offsets[index + 1] - self.offsets[index] file = self.file file.seek(offset) data = file.read(size) assert len(data) == size item = self.produceItem(index, data, file, offset) self.items[index] = item return item def __setitem__(self, index, item): self.items[index] = item def produceItem(self, index, data, file, offset): return data
[docs] def append(self, item): """Add an item to an INDEX.""" self.items.append(item)
def getCompiler(self, strings, parent, isCFF2=None): return self.compilerClass(self, strings, parent, isCFF2=isCFF2)
[docs] def clear(self): """Empty the INDEX.""" del self.items[:]
[docs]class GlobalSubrsIndex(Index): """This index contains all the global subroutines in the font. A global subroutine is a set of ``CharString`` data which is accessible to any glyph in the font, and are used to store repeated instructions - for example, components may be encoded as global subroutines, but so could hinting instructions. Remember that when interpreting a ``callgsubr`` instruction (or indeed a ``callsubr`` instruction) that you will need to add the "subroutine number bias" to number given: .. code:: python tt = ttLib.TTFont("Almendra-Bold.otf") u = tt["CFF "].cff[0].CharStrings["udieresis"] u.decompile() u.toXML(XMLWriter(sys.stdout)) # <some stuff> # -64 callgsubr <-- Subroutine which implements the dieresis mark # <other stuff> tt["CFF "].cff[0].GlobalSubrs[-64] # <-- WRONG # <T2CharString (bytecode) at 103451d10> tt["CFF "].cff[0].GlobalSubrs[-64 + 107] # <-- RIGHT # <T2CharString (source) at 103451390> ("The bias applied depends on the number of subrs (gsubrs). If the number of subrs (gsubrs) is less than 1240, the bias is 107. Otherwise if it is less than 33900, it is 1131; otherwise it is 32768.", `Subroutine Operators <https://docs.microsoft.com/en-us/typography/opentype/otspec180/cff2charstr#section4.4>`) """ compilerClass = GlobalSubrsCompiler subrClass = psCharStrings.T2CharString charStringClass = psCharStrings.T2CharString def __init__(self, file=None, globalSubrs=None, private=None, fdSelect=None, fdArray=None, isCFF2=None): super(GlobalSubrsIndex, self).__init__(file, isCFF2=isCFF2) self.globalSubrs = globalSubrs self.private = private if fdSelect: self.fdSelect = fdSelect if fdArray: self.fdArray = fdArray def produceItem(self, index, data, file, offset): if self.private is not None: private = self.private elif hasattr(self, 'fdArray') and self.fdArray is not None: if hasattr(self, 'fdSelect') and self.fdSelect is not None: fdIndex = self.fdSelect[index] else: fdIndex = 0 private = self.fdArray[fdIndex].Private else: private = None return self.subrClass(data, private=private, globalSubrs=self.globalSubrs)
[docs] def toXML(self, xmlWriter): """Write the subroutines index into XML representation onto the given :class:`fontTools.misc.xmlWriter.XMLWriter`. .. code:: python writer = xmlWriter.XMLWriter(sys.stdout) tt["CFF "].cff[0].GlobalSubrs.toXML(writer) """ xmlWriter.comment( "The 'index' attribute is only for humans; " "it is ignored when parsed.") xmlWriter.newline() for i in range(len(self)): subr = self[i] if subr.needsDecompilation(): xmlWriter.begintag("CharString", index=i, raw=1) else: xmlWriter.begintag("CharString", index=i) xmlWriter.newline() subr.toXML(xmlWriter) xmlWriter.endtag("CharString") xmlWriter.newline()
def fromXML(self, name, attrs, content): if name != "CharString": return subr = self.subrClass() subr.fromXML(name, attrs, content) self.append(subr) def getItemAndSelector(self, index): sel = None if hasattr(self, 'fdSelect'): sel = self.fdSelect[index] return self[index], sel
[docs]class SubrsIndex(GlobalSubrsIndex): """This index contains a glyph's local subroutines. A local subroutine is a private set of ``CharString`` data which is accessible only to the glyph to which the index is attached.""" compilerClass = SubrsCompiler
[docs]class TopDictIndex(Index): """This index represents the array of ``TopDict`` structures in the font (again, usually only one entry is present). Hence the following calls are equivalent: .. code:: python tt["CFF "].cff[0] # <fontTools.cffLib.TopDict object at 0x102ed6e50> tt["CFF "].cff.topDictIndex[0] # <fontTools.cffLib.TopDict object at 0x102ed6e50> """ compilerClass = TopDictIndexCompiler def __init__(self, file=None, cff2GetGlyphOrder=None, topSize=0, isCFF2=None): assert (isCFF2 is None) == (file is None) self.cff2GetGlyphOrder = cff2GetGlyphOrder if file is not None and isCFF2: self._isCFF2 = isCFF2 self.items = [] name = self.__class__.__name__ log.log(DEBUG, "loading %s at %s", name, file.tell()) self.file = file count = 1 self.items = [None] * count self.offsets = [0, topSize] self.offsetBase = file.tell() # pretend we've read the whole lot file.seek(self.offsetBase + topSize) log.log(DEBUG, " end of %s at %s", name, file.tell()) else: super(TopDictIndex, self).__init__(file, isCFF2=isCFF2) def produceItem(self, index, data, file, offset): top = TopDict( self.strings, file, offset, self.GlobalSubrs, self.cff2GetGlyphOrder, isCFF2=self._isCFF2) top.decompile(data) return top def toXML(self, xmlWriter): for i in range(len(self)): xmlWriter.begintag("FontDict", index=i) xmlWriter.newline() self[i].toXML(xmlWriter) xmlWriter.endtag("FontDict") xmlWriter.newline()
[docs]class FDArrayIndex(Index): compilerClass = FDArrayIndexCompiler def toXML(self, xmlWriter): for i in range(len(self)): xmlWriter.begintag("FontDict", index=i) xmlWriter.newline() self[i].toXML(xmlWriter) xmlWriter.endtag("FontDict") xmlWriter.newline() def produceItem(self, index, data, file, offset): fontDict = FontDict( self.strings, file, offset, self.GlobalSubrs, isCFF2=self._isCFF2, vstore=self.vstore) fontDict.decompile(data) return fontDict def fromXML(self, name, attrs, content): if name != "FontDict": return fontDict = FontDict() for element in content: if isinstance(element, str): continue name, attrs, content = element fontDict.fromXML(name, attrs, content) self.append(fontDict)
class VarStoreData(object): def __init__(self, file=None, otVarStore=None): self.file = file self.data = None self.otVarStore = otVarStore self.font = TTFont() # dummy font for the decompile function. def decompile(self): if self.file: # read data in from file. Assume position is correct. length = readCard16(self.file) self.data = self.file.read(length) globalState = {} reader = OTTableReader(self.data, globalState) self.otVarStore = ot.VarStore() self.otVarStore.decompile(reader, self.font) return self def compile(self): writer = OTTableWriter() self.otVarStore.compile(writer, self.font) # Note that this omits the initial Card16 length from the CFF2 # VarStore data block self.data = writer.getAllData() def writeXML(self, xmlWriter, name): self.otVarStore.toXML(xmlWriter, self.font) def xmlRead(self, name, attrs, content, parent): self.otVarStore = ot.VarStore() for element in content: if isinstance(element, tuple): name, attrs, content = element self.otVarStore.fromXML(name, attrs, content, self.font) else: pass return None def __len__(self): return len(self.data) def getNumRegions(self, vsIndex): if vsIndex is None: vsIndex = 0 varData = self.otVarStore.VarData[vsIndex] numRegions = varData.VarRegionCount return numRegions class FDSelect(object): def __init__(self, file=None, numGlyphs=None, format=None): if file: # read data in from file self.format = readCard8(file) if self.format == 0: from array import array self.gidArray = array("B", file.read(numGlyphs)).tolist() elif self.format == 3: gidArray = [None] * numGlyphs nRanges = readCard16(file) fd = None prev = None for i in range(nRanges): first = readCard16(file) if prev is not None: for glyphID in range(prev, first): gidArray[glyphID] = fd prev = first fd = readCard8(file) if prev is not None: first = readCard16(file) for glyphID in range(prev, first): gidArray[glyphID] = fd self.gidArray = gidArray elif self.format == 4: gidArray = [None] * numGlyphs nRanges = readCard32(file) fd = None prev = None for i in range(nRanges): first = readCard32(file) if prev is not None: for glyphID in range(prev, first): gidArray[glyphID] = fd prev = first fd = readCard16(file) if prev is not None: first = readCard32(file) for glyphID in range(prev, first): gidArray[glyphID] = fd self.gidArray = gidArray else: assert False, "unsupported FDSelect format: %s" % format else: # reading from XML. Make empty gidArray, and leave format as passed in. # format is None will result in the smallest representation being used. self.format = format self.gidArray = [] def __len__(self): return len(self.gidArray) def __getitem__(self, index): return self.gidArray[index] def __setitem__(self, index, fdSelectValue): self.gidArray[index] = fdSelectValue def append(self, fdSelectValue): self.gidArray.append(fdSelectValue)
[docs]class CharStrings(object): """The ``CharStrings`` in the font represent the instructions for drawing each glyph. This object presents a dictionary interface to the font's CharStrings, indexed by glyph name: .. code:: python tt["CFF "].cff[0].CharStrings["a"] # <T2CharString (bytecode) at 103451e90> See :class:`fontTools.misc.psCharStrings.T1CharString` and :class:`fontTools.misc.psCharStrings.T2CharString` for how to decompile, compile and interpret the glyph drawing instructions in the returned objects. """ def __init__(self, file, charset, globalSubrs, private, fdSelect, fdArray, isCFF2=None, varStore=None): self.globalSubrs = globalSubrs self.varStore = varStore if file is not None: self.charStringsIndex = SubrsIndex( file, globalSubrs, private, fdSelect, fdArray, isCFF2=isCFF2) self.charStrings = charStrings = {} for i in range(len(charset)): charStrings[charset[i]] = i # read from OTF file: charStrings.values() are indices into # charStringsIndex. self.charStringsAreIndexed = 1 else: self.charStrings = {} # read from ttx file: charStrings.values() are actual charstrings self.charStringsAreIndexed = 0 self.private = private if fdSelect is not None: self.fdSelect = fdSelect if fdArray is not None: self.fdArray = fdArray def keys(self): return list(self.charStrings.keys()) def values(self): if self.charStringsAreIndexed: return self.charStringsIndex else: return list(self.charStrings.values()) def has_key(self, name): return name in self.charStrings __contains__ = has_key def __len__(self): return len(self.charStrings) def __getitem__(self, name): charString = self.charStrings[name] if self.charStringsAreIndexed: charString = self.charStringsIndex[charString] return charString def __setitem__(self, name, charString): if self.charStringsAreIndexed: index = self.charStrings[name] self.charStringsIndex[index] = charString else: self.charStrings[name] = charString def getItemAndSelector(self, name): if self.charStringsAreIndexed: index = self.charStrings[name] return self.charStringsIndex.getItemAndSelector(index) else: if hasattr(self, 'fdArray'): if hasattr(self, 'fdSelect'): sel = self.charStrings[name].fdSelectIndex else: sel = 0 else: sel = None return self.charStrings[name], sel def toXML(self, xmlWriter): names = sorted(self.keys()) for name in names: charStr, fdSelectIndex = self.getItemAndSelector(name) if charStr.needsDecompilation(): raw = [("raw", 1)] else: raw = [] if fdSelectIndex is None: xmlWriter.begintag("CharString", [('name', name)] + raw) else: xmlWriter.begintag( "CharString", [('name', name), ('fdSelectIndex', fdSelectIndex)] + raw) xmlWriter.newline() charStr.toXML(xmlWriter) xmlWriter.endtag("CharString") xmlWriter.newline() def fromXML(self, name, attrs, content): for element in content: if isinstance(element, str): continue name, attrs, content = element if name != "CharString": continue fdID = -1 if hasattr(self, "fdArray"): try: fdID = safeEval(attrs["fdSelectIndex"]) except KeyError: fdID = 0 private = self.fdArray[fdID].Private else: private = self.private glyphName = attrs["name"] charStringClass = psCharStrings.T2CharString charString = charStringClass( private=private, globalSubrs=self.globalSubrs) charString.fromXML(name, attrs, content) if fdID >= 0: charString.fdSelectIndex = fdID self[glyphName] = charString
def readCard8(file): return byteord(file.read(1)) def readCard16(file): value, = struct.unpack(">H", file.read(2)) return value def readCard32(file): value, = struct.unpack(">L", file.read(4)) return value def writeCard8(file, value): file.write(bytechr(value)) def writeCard16(file, value): file.write(struct.pack(">H", value)) def writeCard32(file, value): file.write(struct.pack(">L", value)) def packCard8(value): return bytechr(value) def packCard16(value): return struct.pack(">H", value) def packCard32(value): return struct.pack(">L", value) def buildOperatorDict(table): d = {} for op, name, arg, default, conv in table: d[op] = (name, arg) return d def buildOpcodeDict(table): d = {} for op, name, arg, default, conv in table: if isinstance(op, tuple): op = bytechr(op[0]) + bytechr(op[1]) else: op = bytechr(op) d[name] = (op, arg) return d def buildOrder(table): l = [] for op, name, arg, default, conv in table: l.append(name) return l def buildDefaults(table): d = {} for op, name, arg, default, conv in table: if default is not None: d[name] = default return d def buildConverters(table): d = {} for op, name, arg, default, conv in table: d[name] = conv return d class SimpleConverter(object): def read(self, parent, value): if not hasattr(parent, "file"): return self._read(parent, value) file = parent.file pos = file.tell() try: return self._read(parent, value) finally: file.seek(pos) def _read(self, parent, value): return value def write(self, parent, value): return value def xmlWrite(self, xmlWriter, name, value): xmlWriter.simpletag(name, value=value) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): return attrs["value"] class ASCIIConverter(SimpleConverter): def _read(self, parent, value): return tostr(value, encoding='ascii') def write(self, parent, value): return tobytes(value, encoding='ascii') def xmlWrite(self, xmlWriter, name, value): xmlWriter.simpletag(name, value=tostr(value, encoding="ascii")) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): return tobytes(attrs["value"], encoding=("ascii")) class Latin1Converter(SimpleConverter): def _read(self, parent, value): return tostr(value, encoding='latin1') def write(self, parent, value): return tobytes(value, encoding='latin1') def xmlWrite(self, xmlWriter, name, value): value = tostr(value, encoding="latin1") if name in ['Notice', 'Copyright']: value = re.sub(r"[\r\n]\s+", " ", value) xmlWriter.simpletag(name, value=value) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): return tobytes(attrs["value"], encoding=("latin1")) def parseNum(s): try: value = int(s) except: value = float(s) return value def parseBlendList(s): valueList = [] for element in s: if isinstance(element, str): continue name, attrs, content = element blendList = attrs["value"].split() blendList = [eval(val) for val in blendList] valueList.append(blendList) if len(valueList) == 1: valueList = valueList[0] return valueList class NumberConverter(SimpleConverter): def xmlWrite(self, xmlWriter, name, value): if isinstance(value, list): xmlWriter.begintag(name) xmlWriter.newline() xmlWriter.indent() blendValue = " ".join([str(val) for val in value]) xmlWriter.simpletag(kBlendDictOpName, value=blendValue) xmlWriter.newline() xmlWriter.dedent() xmlWriter.endtag(name) xmlWriter.newline() else: xmlWriter.simpletag(name, value=value) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): valueString = attrs.get("value", None) if valueString is None: value = parseBlendList(content) else: value = parseNum(attrs["value"]) return value class ArrayConverter(SimpleConverter): def xmlWrite(self, xmlWriter, name, value): if value and isinstance(value[0], list): xmlWriter.begintag(name) xmlWriter.newline() xmlWriter.indent() for valueList in value: blendValue = " ".join([str(val) for val in valueList]) xmlWriter.simpletag(kBlendDictOpName, value=blendValue) xmlWriter.newline() xmlWriter.dedent() xmlWriter.endtag(name) xmlWriter.newline() else: value = " ".join([str(val) for val in value]) xmlWriter.simpletag(name, value=value) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): valueString = attrs.get("value", None) if valueString is None: valueList = parseBlendList(content) else: values = valueString.split() valueList = [parseNum(value) for value in values] return valueList class TableConverter(SimpleConverter): def xmlWrite(self, xmlWriter, name, value): xmlWriter.begintag(name) xmlWriter.newline() value.toXML(xmlWriter) xmlWriter.endtag(name) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): ob = self.getClass()() for element in content: if isinstance(element, str): continue name, attrs, content = element ob.fromXML(name, attrs, content) return ob class PrivateDictConverter(TableConverter): def getClass(self): return PrivateDict def _read(self, parent, value): size, offset = value file = parent.file isCFF2 = parent._isCFF2 try: vstore = parent.vstore except AttributeError: vstore = None priv = PrivateDict( parent.strings, file, offset, isCFF2=isCFF2, vstore=vstore) file.seek(offset) data = file.read(size) assert len(data) == size priv.decompile(data) return priv def write(self, parent, value): return (0, 0) # dummy value class SubrsConverter(TableConverter): def getClass(self): return SubrsIndex def _read(self, parent, value): file = parent.file isCFF2 = parent._isCFF2 file.seek(parent.offset + value) # Offset(self) return SubrsIndex(file, isCFF2=isCFF2) def write(self, parent, value): return 0 # dummy value class CharStringsConverter(TableConverter): def _read(self, parent, value): file = parent.file isCFF2 = parent._isCFF2 charset = parent.charset varStore = getattr(parent, "VarStore", None) globalSubrs = parent.GlobalSubrs if hasattr(parent, "FDArray"): fdArray = parent.FDArray if hasattr(parent, "FDSelect"): fdSelect = parent.FDSelect else: fdSelect = None private = None else: fdSelect, fdArray = None, None private = parent.Private file.seek(value) # Offset(0) charStrings = CharStrings( file, charset, globalSubrs, private, fdSelect, fdArray, isCFF2=isCFF2, varStore=varStore) return charStrings def write(self, parent, value): return 0 # dummy value def xmlRead(self, name, attrs, content, parent): if hasattr(parent, "FDArray"): # if it is a CID-keyed font, then the private Dict is extracted from the # parent.FDArray fdArray = parent.FDArray if hasattr(parent, "FDSelect"): fdSelect = parent.FDSelect else: fdSelect = None private = None else: # if it is a name-keyed font, then the private dict is in the top dict, # and # there is no fdArray. private, fdSelect, fdArray = parent.Private, None, None charStrings = CharStrings( None, None, parent.GlobalSubrs, private, fdSelect, fdArray, varStore=getattr(parent, "VarStore", None)) charStrings.fromXML(name, attrs, content) return charStrings class CharsetConverter(SimpleConverter): def _read(self, parent, value): isCID = hasattr(parent, "ROS") if value > 2: numGlyphs = parent.numGlyphs file = parent.file file.seek(value) log.log(DEBUG, "loading charset at %s", value) format = readCard8(file) if format == 0: charset = parseCharset0(numGlyphs, file, parent.strings, isCID) elif format == 1 or format == 2: charset = parseCharset(numGlyphs, file, parent.strings, isCID, format) else: raise NotImplementedError assert len(charset) == numGlyphs log.log(DEBUG, " charset end at %s", file.tell()) # make sure glyph names are unique allNames = {} newCharset = [] for glyphName in charset: if glyphName in allNames: # make up a new glyphName that's unique n = allNames[glyphName] while (glyphName + "#" + str(n)) in allNames: n += 1 allNames[glyphName] = n + 1 glyphName = glyphName + "#" + str(n) allNames[glyphName] = 1 newCharset.append(glyphName) charset = newCharset else: # offset == 0 -> no charset data. if isCID or "CharStrings" not in parent.rawDict: # We get here only when processing fontDicts from the FDArray of # CFF-CID fonts. Only the real topDict references the chrset. assert value == 0 charset = None elif value == 0: charset = cffISOAdobeStrings elif value == 1: charset = cffIExpertStrings elif value == 2: charset = cffExpertSubsetStrings if charset and (len(charset) != parent.numGlyphs): charset = charset[:parent.numGlyphs] return charset def write(self, parent, value): return 0 # dummy value def xmlWrite(self, xmlWriter, name, value): # XXX only write charset when not in OT/TTX context, where we # dump charset as a separate "GlyphOrder" table. # # xmlWriter.simpletag("charset") xmlWriter.comment("charset is dumped separately as the 'GlyphOrder' element") xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): pass class CharsetCompiler(object): def __init__(self, strings, charset, parent): assert charset[0] == '.notdef' isCID = hasattr(parent.dictObj, "ROS") data0 = packCharset0(charset, isCID, strings) data = packCharset(charset, isCID, strings) if len(data) < len(data0): self.data = data else: self.data = data0 self.parent = parent def setPos(self, pos, endPos): self.parent.rawDict["charset"] = pos def getDataLength(self): return len(self.data) def toFile(self, file): file.write(self.data) def getStdCharSet(charset): # check to see if we can use a predefined charset value. predefinedCharSetVal = None predefinedCharSets = [ (cffISOAdobeStringCount, cffISOAdobeStrings, 0), (cffExpertStringCount, cffIExpertStrings, 1), (cffExpertSubsetStringCount, cffExpertSubsetStrings, 2)] lcs = len(charset) for cnt, pcs, csv in predefinedCharSets: if predefinedCharSetVal is not None: break if lcs > cnt: continue predefinedCharSetVal = csv for i in range(lcs): if charset[i] != pcs[i]: predefinedCharSetVal = None break return predefinedCharSetVal def getCIDfromName(name, strings): return int(name[3:]) def getSIDfromName(name, strings): return strings.getSID(name) def packCharset0(charset, isCID, strings): fmt = 0 data = [packCard8(fmt)] if isCID: getNameID = getCIDfromName else: getNameID = getSIDfromName for name in charset[1:]: data.append(packCard16(getNameID(name, strings))) return bytesjoin(data) def packCharset(charset, isCID, strings): fmt = 1 ranges = [] first = None end = 0 if isCID: getNameID = getCIDfromName else: getNameID = getSIDfromName for name in charset[1:]: SID = getNameID(name, strings) if first is None: first = SID elif end + 1 != SID: nLeft = end - first if nLeft > 255: fmt = 2 ranges.append((first, nLeft)) first = SID end = SID if end: nLeft = end - first if nLeft > 255: fmt = 2 ranges.append((first, nLeft)) data = [packCard8(fmt)] if fmt == 1: nLeftFunc = packCard8 else: nLeftFunc = packCard16 for first, nLeft in ranges: data.append(packCard16(first) + nLeftFunc(nLeft)) return bytesjoin(data) def parseCharset0(numGlyphs, file, strings, isCID): charset = [".notdef"] if isCID: for i in range(numGlyphs - 1): CID = readCard16(file) charset.append("cid" + str(CID).zfill(5)) else: for i in range(numGlyphs - 1): SID = readCard16(file) charset.append(strings[SID]) return charset def parseCharset(numGlyphs, file, strings, isCID, fmt): charset = ['.notdef'] count = 1 if fmt == 1: nLeftFunc = readCard8 else: nLeftFunc = readCard16 while count < numGlyphs: first = readCard16(file) nLeft = nLeftFunc(file) if isCID: for CID in range(first, first + nLeft + 1): charset.append("cid" + str(CID).zfill(5)) else: for SID in range(first, first + nLeft + 1): charset.append(strings[SID]) count = count + nLeft + 1 return charset class EncodingCompiler(object): def __init__(self, strings, encoding, parent): assert not isinstance(encoding, str) data0 = packEncoding0(parent.dictObj.charset, encoding, parent.strings) data1 = packEncoding1(parent.dictObj.charset, encoding, parent.strings) if len(data0) < len(data1): self.data = data0 else: self.data = data1 self.parent = parent def setPos(self, pos, endPos): self.parent.rawDict["Encoding"] = pos def getDataLength(self): return len(self.data) def toFile(self, file): file.write(self.data) class EncodingConverter(SimpleConverter): def _read(self, parent, value): if value == 0: return "StandardEncoding" elif value == 1: return "ExpertEncoding" else: assert value > 1 file = parent.file file.seek(value) log.log(DEBUG, "loading Encoding at %s", value) fmt = readCard8(file) haveSupplement = fmt & 0x80 if haveSupplement: raise NotImplementedError("Encoding supplements are not yet supported") fmt = fmt & 0x7f if fmt == 0: encoding = parseEncoding0(parent.charset, file, haveSupplement, parent.strings) elif fmt == 1: encoding = parseEncoding1(parent.charset, file, haveSupplement, parent.strings) return encoding def write(self, parent, value): if value == "StandardEncoding": return 0 elif value == "ExpertEncoding": return 1 return 0 # dummy value def xmlWrite(self, xmlWriter, name, value): if value in ("StandardEncoding", "ExpertEncoding"): xmlWriter.simpletag(name, name=value) xmlWriter.newline() return xmlWriter.begintag(name) xmlWriter.newline() for code in range(len(value)): glyphName = value[code] if glyphName != ".notdef": xmlWriter.simpletag("map", code=hex(code), name=glyphName) xmlWriter.newline() xmlWriter.endtag(name) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): if "name" in attrs: return attrs["name"] encoding = [".notdef"] * 256 for element in content: if isinstance(element, str): continue name, attrs, content = element code = safeEval(attrs["code"]) glyphName = attrs["name"] encoding[code] = glyphName return encoding def parseEncoding0(charset, file, haveSupplement, strings): nCodes = readCard8(file) encoding = [".notdef"] * 256 for glyphID in range(1, nCodes + 1): code = readCard8(file) if code != 0: encoding[code] = charset[glyphID] return encoding def parseEncoding1(charset, file, haveSupplement, strings): nRanges = readCard8(file) encoding = [".notdef"] * 256 glyphID = 1 for i in range(nRanges): code = readCard8(file) nLeft = readCard8(file) for glyphID in range(glyphID, glyphID + nLeft + 1): encoding[code] = charset[glyphID] code = code + 1 glyphID = glyphID + 1 return encoding def packEncoding0(charset, encoding, strings): fmt = 0 m = {} for code in range(len(encoding)): name = encoding[code] if name != ".notdef": m[name] = code codes = [] for name in charset[1:]: code = m.get(name) codes.append(code) while codes and codes[-1] is None: codes.pop() data = [packCard8(fmt), packCard8(len(codes))] for code in codes: if code is None: code = 0 data.append(packCard8(code)) return bytesjoin(data) def packEncoding1(charset, encoding, strings): fmt = 1 m = {} for code in range(len(encoding)): name = encoding[code] if name != ".notdef": m[name] = code ranges = [] first = None end = 0 for name in charset[1:]: code = m.get(name, -1) if first is None: first = code elif end + 1 != code: nLeft = end - first ranges.append((first, nLeft)) first = code end = code nLeft = end - first ranges.append((first, nLeft)) # remove unencoded glyphs at the end. while ranges and ranges[-1][0] == -1: ranges.pop() data = [packCard8(fmt), packCard8(len(ranges))] for first, nLeft in ranges: if first == -1: # unencoded first = 0 data.append(packCard8(first) + packCard8(nLeft)) return bytesjoin(data) class FDArrayConverter(TableConverter): def _read(self, parent, value): try: vstore = parent.VarStore except AttributeError: vstore = None file = parent.file isCFF2 = parent._isCFF2 file.seek(value) fdArray = FDArrayIndex(file, isCFF2=isCFF2) fdArray.vstore = vstore fdArray.strings = parent.strings fdArray.GlobalSubrs = parent.GlobalSubrs return fdArray def write(self, parent, value): return 0 # dummy value def xmlRead(self, name, attrs, content, parent): fdArray = FDArrayIndex() for element in content: if isinstance(element, str): continue name, attrs, content = element fdArray.fromXML(name, attrs, content) return fdArray class FDSelectConverter(SimpleConverter): def _read(self, parent, value): file = parent.file file.seek(value) fdSelect = FDSelect(file, parent.numGlyphs) return fdSelect def write(self, parent, value): return 0 # dummy value # The FDSelect glyph data is written out to XML in the charstring keys, # so we write out only the format selector def xmlWrite(self, xmlWriter, name, value): xmlWriter.simpletag(name, [('format', value.format)]) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): fmt = safeEval(attrs["format"]) file = None numGlyphs = None fdSelect = FDSelect(file, numGlyphs, fmt) return fdSelect class VarStoreConverter(SimpleConverter): def _read(self, parent, value): file = parent.file file.seek(value) varStore = VarStoreData(file) varStore.decompile() return varStore def write(self, parent, value): return 0 # dummy value def xmlWrite(self, xmlWriter, name, value): value.writeXML(xmlWriter, name) def xmlRead(self, name, attrs, content, parent): varStore = VarStoreData() varStore.xmlRead(name, attrs, content, parent) return varStore def packFDSelect0(fdSelectArray): fmt = 0 data = [packCard8(fmt)] for index in fdSelectArray: data.append(packCard8(index)) return bytesjoin(data) def packFDSelect3(fdSelectArray): fmt = 3 fdRanges = [] lenArray = len(fdSelectArray) lastFDIndex = -1 for i in range(lenArray): fdIndex = fdSelectArray[i] if lastFDIndex != fdIndex: fdRanges.append([i, fdIndex]) lastFDIndex = fdIndex sentinelGID = i + 1 data = [packCard8(fmt)] data.append(packCard16(len(fdRanges))) for fdRange in fdRanges: data.append(packCard16(fdRange[0])) data.append(packCard8(fdRange[1])) data.append(packCard16(sentinelGID)) return bytesjoin(data) def packFDSelect4(fdSelectArray): fmt = 4 fdRanges = [] lenArray = len(fdSelectArray) lastFDIndex = -1 for i in range(lenArray): fdIndex = fdSelectArray[i] if lastFDIndex != fdIndex: fdRanges.append([i, fdIndex]) lastFDIndex = fdIndex sentinelGID = i + 1 data = [packCard8(fmt)] data.append(packCard32(len(fdRanges))) for fdRange in fdRanges: data.append(packCard32(fdRange[0])) data.append(packCard16(fdRange[1])) data.append(packCard32(sentinelGID)) return bytesjoin(data) class FDSelectCompiler(object): def __init__(self, fdSelect, parent): fmt = fdSelect.format fdSelectArray = fdSelect.gidArray if fmt == 0: self.data = packFDSelect0(fdSelectArray) elif fmt == 3: self.data = packFDSelect3(fdSelectArray) elif fmt == 4: self.data = packFDSelect4(fdSelectArray) else: # choose smaller of the two formats data0 = packFDSelect0(fdSelectArray) data3 = packFDSelect3(fdSelectArray) if len(data0) < len(data3): self.data = data0 fdSelect.format = 0 else: self.data = data3 fdSelect.format = 3 self.parent = parent def setPos(self, pos, endPos): self.parent.rawDict["FDSelect"] = pos def getDataLength(self): return len(self.data) def toFile(self, file): file.write(self.data) class VarStoreCompiler(object): def __init__(self, varStoreData, parent): self.parent = parent if not varStoreData.data: varStoreData.compile() data = [ packCard16(len(varStoreData.data)), varStoreData.data ] self.data = bytesjoin(data) def setPos(self, pos, endPos): self.parent.rawDict["VarStore"] = pos def getDataLength(self): return len(self.data) def toFile(self, file): file.write(self.data) class ROSConverter(SimpleConverter): def xmlWrite(self, xmlWriter, name, value): registry, order, supplement = value xmlWriter.simpletag( name, [ ('Registry', tostr(registry)), ('Order', tostr(order)), ('Supplement', supplement) ]) xmlWriter.newline() def xmlRead(self, name, attrs, content, parent): return (attrs['Registry'], attrs['Order'], safeEval(attrs['Supplement'])) topDictOperators = [ # opcode name argument type default converter (25, 'maxstack', 'number', None, None), ((12, 30), 'ROS', ('SID', 'SID', 'number'), None, ROSConverter()), ((12, 20), 'SyntheticBase', 'number', None, None), (0, 'version', 'SID', None, None), (1, 'Notice', 'SID', None, Latin1Converter()), ((12, 0), 'Copyright', 'SID', None, Latin1Converter()), (2, 'FullName', 'SID', None, None), ((12, 38), 'FontName', 'SID', None, None), (3, 'FamilyName', 'SID', None, None), (4, 'Weight', 'SID', None, None), ((12, 1), 'isFixedPitch', 'number', 0, None), ((12, 2), 'ItalicAngle', 'number', 0, None), ((12, 3), 'UnderlinePosition', 'number', -100, None), ((12, 4), 'UnderlineThickness', 'number', 50, None), ((12, 5), 'PaintType', 'number', 0, None), ((12, 6), 'CharstringType', 'number', 2, None), ((12, 7), 'FontMatrix', 'array', [0.001, 0, 0, 0.001, 0, 0], None), (13, 'UniqueID', 'number', None, None), (5, 'FontBBox', 'array', [0, 0, 0, 0], None), ((12, 8), 'StrokeWidth', 'number', 0, None), (14, 'XUID', 'array', None, None), ((12, 21), 'PostScript', 'SID', None, None), ((12, 22), 'BaseFontName', 'SID', None, None), ((12, 23), 'BaseFontBlend', 'delta', None, None), ((12, 31), 'CIDFontVersion', 'number', 0, None), ((12, 32), 'CIDFontRevision', 'number', 0, None), ((12, 33), 'CIDFontType', 'number', 0, None), ((12, 34), 'CIDCount', 'number', 8720, None), (15, 'charset', 'number', None, CharsetConverter()), ((12, 35), 'UIDBase', 'number', None, None), (16, 'Encoding', 'number', 0, EncodingConverter()), (18, 'Private', ('number', 'number'), None, PrivateDictConverter()), ((12, 37), 'FDSelect', 'number', None, FDSelectConverter()), ((12, 36), 'FDArray', 'number', None, FDArrayConverter()), (17, 'CharStrings', 'number', None, CharStringsConverter()), (24, 'VarStore', 'number', None, VarStoreConverter()), ] topDictOperators2 = [ # opcode name argument type default converter (25, 'maxstack', 'number', None, None), ((12, 7), 'FontMatrix', 'array', [0.001, 0, 0, 0.001, 0, 0], None), ((12, 37), 'FDSelect', 'number', None, FDSelectConverter()), ((12, 36), 'FDArray', 'number', None, FDArrayConverter()), (17, 'CharStrings', 'number', None, CharStringsConverter()), (24, 'VarStore', 'number', None, VarStoreConverter()), ] # Note! FDSelect and FDArray must both preceed CharStrings in the output XML build order, # in order for the font to compile back from xml. kBlendDictOpName = "blend" blendOp = 23 privateDictOperators = [ # opcode name argument type default converter (22, "vsindex", 'number', None, None), (blendOp, kBlendDictOpName, 'blendList', None, None), # This is for reading to/from XML: it not written to CFF. (6, 'BlueValues', 'delta', None, None), (7, 'OtherBlues', 'delta', None, None), (8, 'FamilyBlues', 'delta', None, None), (9, 'FamilyOtherBlues', 'delta', None, None), ((12, 9), 'BlueScale', 'number', 0.039625, None), ((12, 10), 'BlueShift', 'number', 7, None), ((12, 11), 'BlueFuzz', 'number', 1, None), (10, 'StdHW', 'number', None, None), (11, 'StdVW', 'number', None, None), ((12, 12), 'StemSnapH', 'delta', None, None), ((12, 13), 'StemSnapV', 'delta', None, None), ((12, 14), 'ForceBold', 'number', 0, None), ((12, 15), 'ForceBoldThreshold', 'number', None, None), # deprecated ((12, 16), 'lenIV', 'number', None, None), # deprecated ((12, 17), 'LanguageGroup', 'number', 0, None), ((12, 18), 'ExpansionFactor', 'number', 0.06, None), ((12, 19), 'initialRandomSeed', 'number', 0, None), (20, 'defaultWidthX', 'number', 0, None), (21, 'nominalWidthX', 'number', 0, None), (19, 'Subrs', 'number', None, SubrsConverter()), ] privateDictOperators2 = [ # opcode name argument type default converter (22, "vsindex", 'number', None, None), (blendOp, kBlendDictOpName, 'blendList', None, None), # This is for reading to/from XML: it not written to CFF. (6, 'BlueValues', 'delta', None, None), (7, 'OtherBlues', 'delta', None, None), (8, 'FamilyBlues', 'delta', None, None), (9, 'FamilyOtherBlues', 'delta', None, None), ((12, 9), 'BlueScale', 'number', 0.039625, None), ((12, 10), 'BlueShift', 'number', 7, None), ((12, 11), 'BlueFuzz', 'number', 1, None), (10, 'StdHW', 'number', None, None), (11, 'StdVW', 'number', None, None), ((12, 12), 'StemSnapH', 'delta', None, None), ((12, 13), 'StemSnapV', 'delta', None, None), ((12, 17), 'LanguageGroup', 'number', 0, None), ((12, 18), 'ExpansionFactor', 'number', 0.06, None), (19, 'Subrs', 'number', None, SubrsConverter()), ] def addConverters(table): for i in range(len(table)): op, name, arg, default, conv = table[i] if conv is not None: continue if arg in ("delta", "array"): conv = ArrayConverter() elif arg == "number": conv = NumberConverter() elif arg == "SID": conv = ASCIIConverter() elif arg == 'blendList': conv = None else: assert False table[i] = op, name, arg, default, conv addConverters(privateDictOperators) addConverters(topDictOperators) class TopDictDecompiler(psCharStrings.DictDecompiler): operators = buildOperatorDict(topDictOperators) class PrivateDictDecompiler(psCharStrings.DictDecompiler): operators = buildOperatorDict(privateDictOperators) class DictCompiler(object): maxBlendStack = 0 def __init__(self, dictObj, strings, parent, isCFF2=None): if strings: assert isinstance(strings, IndexedStrings) if isCFF2 is None and hasattr(parent, "isCFF2"): isCFF2 = parent.isCFF2 assert isCFF2 is not None self.isCFF2 = isCFF2 self.dictObj = dictObj self.strings = strings self.parent = parent rawDict = {} for name in dictObj.order: value = getattr(dictObj, name, None) if value is None: continue conv = dictObj.converters[name] value = conv.write(dictObj, value) if value == dictObj.defaults.get(name): continue rawDict[name] = value self.rawDict = rawDict def setPos(self, pos, endPos): pass def getDataLength(self): return len(self.compile("getDataLength")) def compile(self, reason): log.log(DEBUG, "-- compiling %s for %s", self.__class__.__name__, reason) rawDict = self.rawDict data = [] for name in self.dictObj.order: value = rawDict.get(name) if value is None: continue op, argType = self.opcodes[name] if isinstance(argType, tuple): l = len(argType) assert len(value) == l, "value doesn't match arg type" for i in range(l): arg = argType[i] v = value[i] arghandler = getattr(self, "arg_" + arg) data.append(arghandler(v)) else: arghandler = getattr(self, "arg_" + argType) data.append(arghandler(value)) data.append(op) data = bytesjoin(data) return data def toFile(self, file): data = self.compile("toFile") file.write(data) def arg_number(self, num): if isinstance(num, list): data = [encodeNumber(val) for val in num] data.append(encodeNumber(1)) data.append(bytechr(blendOp)) datum = bytesjoin(data) else: datum = encodeNumber(num) return datum def arg_SID(self, s): return psCharStrings.encodeIntCFF(self.strings.getSID(s)) def arg_array(self, value): data = [] for num in value: data.append(self.arg_number(num)) return bytesjoin(data) def arg_delta(self, value): if not value: return b"" val0 = value[0] if isinstance(val0, list): data = self.arg_delta_blend(value) else: out = [] last = 0 for v in value: out.append(v - last) last = v data = [] for num in out: data.append(encodeNumber(num)) return bytesjoin(data) def arg_delta_blend(self, value): """A delta list with blend lists has to be *all* blend lists. The value is a list is arranged as follows:: [ [V0, d0..dn] [V1, d0..dn] ... [Vm, d0..dn] ] ``V`` is the absolute coordinate value from the default font, and ``d0-dn`` are the delta values from the *n* regions. Each ``V`` is an absolute coordinate from the default font. We want to return a list:: [ [v0, v1..vm] [d0..dn] ... [d0..dn] numBlends blendOp ] where each ``v`` is relative to the previous default font value. """ numMasters = len(value[0]) numBlends = len(value) numStack = (numBlends * numMasters) + 1 if numStack > self.maxBlendStack: # Figure out the max number of value we can blend # and divide this list up into chunks of that size. numBlendValues = int((self.maxBlendStack - 1) / numMasters) out = [] while True: numVal = min(len(value), numBlendValues) if numVal == 0: break valList = value[0:numVal] out1 = self.arg_delta_blend(valList) out.extend(out1) value = value[numVal:] else: firstList = [0] * numBlends deltaList = [None] * numBlends i = 0 prevVal = 0 while i < numBlends: # For PrivateDict BlueValues, the default font # values are absolute, not relative. # Must convert these back to relative coordinates # befor writing to CFF2. defaultValue = value[i][0] firstList[i] = defaultValue - prevVal prevVal = defaultValue deltaList[i] = value[i][1:] i += 1 relValueList = firstList for blendList in deltaList: relValueList.extend(blendList) out = [encodeNumber(val) for val in relValueList] out.append(encodeNumber(numBlends)) out.append(bytechr(blendOp)) return out def encodeNumber(num): if isinstance(num, float): return psCharStrings.encodeFloat(num) else: return psCharStrings.encodeIntCFF(num) class TopDictCompiler(DictCompiler): opcodes = buildOpcodeDict(topDictOperators) def getChildren(self, strings): isCFF2 = self.isCFF2 children = [] if self.dictObj.cff2GetGlyphOrder is None: if hasattr(self.dictObj, "charset") and self.dictObj.charset: if hasattr(self.dictObj, "ROS"): # aka isCID charsetCode = None else: charsetCode = getStdCharSet(self.dictObj.charset) if charsetCode is None: children.append(CharsetCompiler(strings, self.dictObj.charset, self)) else: self.rawDict["charset"] = charsetCode if hasattr(self.dictObj, "Encoding") and self.dictObj.Encoding: encoding = self.dictObj.Encoding if not isinstance(encoding, str): children.append(EncodingCompiler(strings, encoding, self)) else: if hasattr(self.dictObj, "VarStore"): varStoreData = self.dictObj.VarStore varStoreComp = VarStoreCompiler(varStoreData, self) children.append(varStoreComp) if hasattr(self.dictObj, "FDSelect"): # I have not yet supported merging a ttx CFF-CID font, as there are # interesting issues about merging the FDArrays. Here I assume that # either the font was read from XML, and the FDSelect indices are all # in the charstring data, or the FDSelect array is already fully defined. fdSelect = self.dictObj.FDSelect # probably read in from XML; assume fdIndex in CharString data if len(fdSelect) == 0: charStrings = self.dictObj.CharStrings for name in self.dictObj.charset: fdSelect.append(charStrings[name].fdSelectIndex) fdSelectComp = FDSelectCompiler(fdSelect, self) children.append(fdSelectComp) if hasattr(self.dictObj, "CharStrings"): items = [] charStrings = self.dictObj.CharStrings for name in self.dictObj.charset: items.append(charStrings[name]) charStringsComp = CharStringsCompiler( items, strings, self, isCFF2=isCFF2) children.append(charStringsComp) if hasattr(self.dictObj, "FDArray"): # I have not yet supported merging a ttx CFF-CID font, as there are # interesting issues about merging the FDArrays. Here I assume that the # FDArray info is correct and complete. fdArrayIndexComp = self.dictObj.FDArray.getCompiler(strings, self) children.append(fdArrayIndexComp) children.extend(fdArrayIndexComp.getChildren(strings)) if hasattr(self.dictObj, "Private"): privComp = self.dictObj.Private.getCompiler(strings, self) children.append(privComp) children.extend(privComp.getChildren(strings)) return children class FontDictCompiler(DictCompiler): opcodes = buildOpcodeDict(topDictOperators) def __init__(self, dictObj, strings, parent, isCFF2=None): super(FontDictCompiler, self).__init__(dictObj, strings, parent, isCFF2=isCFF2) # # We now take some effort to detect if there were any key/value pairs # supplied that were ignored in the FontDict context, and issue a warning # for those cases. # ignoredNames = [] dictObj = self.dictObj for name in sorted(set(dictObj.converters) - set(dictObj.order)): if name in dictObj.rawDict: # The font was directly read from binary. In this # case, we want to report *all* "useless" key/value # pairs that are in the font, not just the ones that # are different from the default. ignoredNames.append(name) else: # The font was probably read from a TTX file. We only # warn about keys whos value is not the default. The # ones that have the default value will not be written # to binary anyway. default = dictObj.defaults.get(name) if default is not None: conv = dictObj.converters[name] default = conv.read(dictObj, default) if getattr(dictObj, name, None) != default: ignoredNames.append(name) if ignoredNames: log.warning( "Some CFF FDArray/FontDict keys were ignored upon compile: " + " ".join(sorted(ignoredNames))) def getChildren(self, strings): children = [] if hasattr(self.dictObj, "Private"): privComp = self.dictObj.Private.getCompiler(strings, self) children.append(privComp) children.extend(privComp.getChildren(strings)) return children class PrivateDictCompiler(DictCompiler): maxBlendStack = maxStackLimit opcodes = buildOpcodeDict(privateDictOperators) def setPos(self, pos, endPos): size = endPos - pos self.parent.rawDict["Private"] = size, pos self.pos = pos def getChildren(self, strings): children = [] if hasattr(self.dictObj, "Subrs"): children.append(self.dictObj.Subrs.getCompiler(strings, self)) return children class BaseDict(object): def __init__(self, strings=None, file=None, offset=None, isCFF2=None): assert (isCFF2 is None) == (file is None) self.rawDict = {} self.skipNames = [] self.strings = strings if file is None: return self._isCFF2 = isCFF2 self.file = file if offset is not None: log.log(DEBUG, "loading %s at %s", self.__class__.__name__, offset) self.offset = offset def decompile(self, data): log.log(DEBUG, " length %s is %d", self.__class__.__name__, len(data)) dec = self.decompilerClass(self.strings, self) dec.decompile(data) self.rawDict = dec.getDict() self.postDecompile() def postDecompile(self): pass def getCompiler(self, strings, parent, isCFF2=None): return self.compilerClass(self, strings, parent, isCFF2=isCFF2) def __getattr__(self, name): if name[:2] == name[-2:] == "__": # to make deepcopy() and pickle.load() work, we need to signal with # AttributeError that dunder methods like '__deepcopy__' or '__getstate__' # aren't implemented. For more details, see: # https://github.com/fonttools/fonttools/pull/1488 raise AttributeError(name) value = self.rawDict.get(name, None) if value is None: value = self.defaults.get(name) if value is None: raise AttributeError(name) conv = self.converters[name] value = conv.read(self, value) setattr(self, name, value) return value def toXML(self, xmlWriter): for name in self.order: if name in self.skipNames: continue value = getattr(self, name, None) # XXX For "charset" we never skip calling xmlWrite even if the # value is None, so we always write the following XML comment: # # <!-- charset is dumped separately as the 'GlyphOrder' element --> # # Charset is None when 'CFF ' table is imported from XML into an # empty TTFont(). By writing this comment all the time, we obtain # the same XML output whether roundtripping XML-to-XML or # dumping binary-to-XML if value is None and name != "charset": continue conv = self.converters[name] conv.xmlWrite(xmlWriter, name, value) ignoredNames = set(self.rawDict) - set(self.order) if ignoredNames: xmlWriter.comment( "some keys were ignored: %s" % " ".join(sorted(ignoredNames))) xmlWriter.newline() def fromXML(self, name, attrs, content): conv = self.converters[name] value = conv.xmlRead(name, attrs, content, self) setattr(self, name, value)
[docs]class TopDict(BaseDict): """The ``TopDict`` represents the top-level dictionary holding font information. CFF2 tables contain a restricted set of top-level entries as described `here <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#7-top-dict-data>`_, but CFF tables may contain a wider range of information. This information can be accessed through attributes or through the dictionary returned through the ``rawDict`` property: .. code:: python font = tt["CFF "].cff[0] font.FamilyName # 'Linux Libertine O' font.rawDict["FamilyName"] # 'Linux Libertine O' More information is available in the CFF file's private dictionary, accessed via the ``Private`` property: .. code:: python tt["CFF "].cff[0].Private.BlueValues # [-15, 0, 515, 515, 666, 666] """ defaults = buildDefaults(topDictOperators) converters = buildConverters(topDictOperators) compilerClass = TopDictCompiler order = buildOrder(topDictOperators) decompilerClass = TopDictDecompiler def __init__(self, strings=None, file=None, offset=None, GlobalSubrs=None, cff2GetGlyphOrder=None, isCFF2=None): super(TopDict, self).__init__(strings, file, offset, isCFF2=isCFF2) self.cff2GetGlyphOrder = cff2GetGlyphOrder self.GlobalSubrs = GlobalSubrs if isCFF2: self.defaults = buildDefaults(topDictOperators2) self.charset = cff2GetGlyphOrder() self.order = buildOrder(topDictOperators2) else: self.defaults = buildDefaults(topDictOperators) self.order = buildOrder(topDictOperators)
[docs] def getGlyphOrder(self): """Returns a list of glyph names in the CFF font.""" return self.charset
def postDecompile(self): offset = self.rawDict.get("CharStrings") if offset is None: return # get the number of glyphs beforehand. self.file.seek(offset) if self._isCFF2: self.numGlyphs = readCard32(self.file) else: self.numGlyphs = readCard16(self.file) def toXML(self, xmlWriter): if hasattr(self, "CharStrings"): self.decompileAllCharStrings() if hasattr(self, "ROS"): self.skipNames = ['Encoding'] if not hasattr(self, "ROS") or not hasattr(self, "CharStrings"): # these values have default values, but I only want them to show up # in CID fonts. self.skipNames = [ 'CIDFontVersion', 'CIDFontRevision', 'CIDFontType', 'CIDCount'] BaseDict.toXML(self, xmlWriter) def decompileAllCharStrings(self): # Make sure that all the Private Dicts have been instantiated. for i, charString in enumerate(self.CharStrings.values()): try: charString.decompile() except: log.error("Error in charstring %s", i) raise def recalcFontBBox(self): fontBBox = None for charString in self.CharStrings.values(): bounds = charString.calcBounds(self.CharStrings) if bounds is not None: if fontBBox is not None: fontBBox = unionRect(fontBBox, bounds) else: fontBBox = bounds if fontBBox is None: self.FontBBox = self.defaults['FontBBox'][:] else: self.FontBBox = list(intRect(fontBBox))
class FontDict(BaseDict): # # Since fonttools used to pass a lot of fields that are not relevant in the FDArray # FontDict, there are 'ttx' files in the wild that contain all these. These got in # the ttx files because fonttools writes explicit values for all the TopDict default # values. These are not actually illegal in the context of an FDArray FontDict - you # can legally, per spec, put any arbitrary key/value pair in a FontDict - but are # useless since current major company CFF interpreters ignore anything but the set # listed in this file. So, we just silently skip them. An exception is Weight: this # is not used by any interpreter, but some foundries have asked that this be # supported in FDArray FontDicts just to preserve information about the design when # the font is being inspected. # # On top of that, there are fonts out there that contain such useless FontDict values. # # By subclassing TopDict, we *allow* all key/values from TopDict, both when reading # from binary or when reading from XML, but by overriding `order` with a limited # list of names, we ensure that only the useful names ever get exported to XML and # ever get compiled into the binary font. # # We override compilerClass so we can warn about "useless" key/value pairs, either # from the original binary font or from TTX input. # # See: # - https://github.com/fonttools/fonttools/issues/740 # - https://github.com/fonttools/fonttools/issues/601 # - https://github.com/adobe-type-tools/afdko/issues/137 # defaults = {} converters = buildConverters(topDictOperators) compilerClass = FontDictCompiler orderCFF = ['FontName', 'FontMatrix', 'Weight', 'Private'] orderCFF2 = ['Private'] decompilerClass = TopDictDecompiler def __init__(self, strings=None, file=None, offset=None, GlobalSubrs=None, isCFF2=None, vstore=None): super(FontDict, self).__init__(strings, file, offset, isCFF2=isCFF2) self.vstore = vstore self.setCFF2(isCFF2) def setCFF2(self, isCFF2): # isCFF2 may be None. if isCFF2: self.order = self.orderCFF2 self._isCFF2 = True else: self.order = self.orderCFF self._isCFF2 = False class PrivateDict(BaseDict): defaults = buildDefaults(privateDictOperators) converters = buildConverters(privateDictOperators) order = buildOrder(privateDictOperators) decompilerClass = PrivateDictDecompiler compilerClass = PrivateDictCompiler def __init__(self, strings=None, file=None, offset=None, isCFF2=None, vstore=None): super(PrivateDict, self).__init__(strings, file, offset, isCFF2=isCFF2) self.vstore = vstore if isCFF2: self.defaults = buildDefaults(privateDictOperators2) self.order = buildOrder(privateDictOperators2) # Provide dummy values. This avoids needing to provide # an isCFF2 state in a lot of places. self.nominalWidthX = self.defaultWidthX = None else: self.defaults = buildDefaults(privateDictOperators) self.order = buildOrder(privateDictOperators) @property def in_cff2(self): return self._isCFF2 def getNumRegions(self, vi=None): # called from misc/psCharStrings.py # if getNumRegions is being called, we can assume that VarStore exists. if vi is None: if hasattr(self, 'vsindex'): vi = self.vsindex else: vi = 0 numRegions = self.vstore.getNumRegions(vi) return numRegions
[docs]class IndexedStrings(object): """SID -> string mapping.""" def __init__(self, file=None): if file is None: strings = [] else: strings = [ tostr(s, encoding="latin1") for s in Index(file, isCFF2=False) ] self.strings = strings def getCompiler(self): return IndexedStringsCompiler(self, None, self, isCFF2=False) def __len__(self): return len(self.strings) def __getitem__(self, SID): if SID < cffStandardStringCount: return cffStandardStrings[SID] else: return self.strings[SID - cffStandardStringCount] def getSID(self, s): if not hasattr(self, "stringMapping"): self.buildStringMapping() s = tostr(s, encoding="latin1") if s in cffStandardStringMapping: SID = cffStandardStringMapping[s] elif s in self.stringMapping: SID = self.stringMapping[s] else: SID = len(self.strings) + cffStandardStringCount self.strings.append(s) self.stringMapping[s] = SID return SID def getStrings(self): return self.strings def buildStringMapping(self): self.stringMapping = {} for index in range(len(self.strings)): self.stringMapping[self.strings[index]] = index + cffStandardStringCount
# The 391 Standard Strings as used in the CFF format. # from Adobe Technical None #5176, version 1.0, 18 March 1998 cffStandardStrings = ['.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright', 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', 'at', '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', 'bracketleft', 'backslash', '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 cffISOAdobeStrings = [".notdef", "space", "exclam", "quotedbl", "numbersign", "dollar", "percent", "ampersand", "quoteright", "parenleft", "parenright", "asterisk", "plus", "comma", "hyphen", "period", "slash", "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "colon", "semicolon", "less", "equal", "greater", "question", "at", "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", "bracketleft", "backslash", "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"] cffISOAdobeStringCount = 229 assert len(cffISOAdobeStrings) == cffISOAdobeStringCount cffIExpertStrings = [".notdef", "space", "exclamsmall", "Hungarumlautsmall", "dollaroldstyle", "dollarsuperior", "ampersandsmall", "Acutesmall", "parenleftsuperior", "parenrightsuperior", "twodotenleader", "onedotenleader", "comma", "hyphen", "period", "fraction", "zerooldstyle", "oneoldstyle", "twooldstyle", "threeoldstyle", "fouroldstyle", "fiveoldstyle", "sixoldstyle", "sevenoldstyle", "eightoldstyle", "nineoldstyle", "colon", "semicolon", "commasuperior", "threequartersemdash", "periodsuperior", "questionsmall", "asuperior", "bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior", "lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior", "tsuperior", "ff", "fi", "fl", "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", "onequarter", "onehalf", "threequarters", "questiondownsmall", "oneeighth", "threeeighths", "fiveeighths", "seveneighths", "onethird", "twothirds", "zerosuperior", "onesuperior", "twosuperior", "threesuperior", "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"] cffExpertStringCount = 166 assert len(cffIExpertStrings) == cffExpertStringCount cffExpertSubsetStrings = [".notdef", "space", "dollaroldstyle", "dollarsuperior", "parenleftsuperior", "parenrightsuperior", "twodotenleader", "onedotenleader", "comma", "hyphen", "period", "fraction", "zerooldstyle", "oneoldstyle", "twooldstyle", "threeoldstyle", "fouroldstyle", "fiveoldstyle", "sixoldstyle", "sevenoldstyle", "eightoldstyle", "nineoldstyle", "colon", "semicolon", "commasuperior", "threequartersemdash", "periodsuperior", "asuperior", "bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior", "lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior", "tsuperior", "ff", "fi", "fl", "ffi", "ffl", "parenleftinferior", "parenrightinferior", "hyphensuperior", "colonmonetary", "onefitted", "rupiah", "centoldstyle", "figuredash", "hypheninferior", "onequarter", "onehalf", "threequarters", "oneeighth", "threeeighths", "fiveeighths", "seveneighths", "onethird", "twothirds", "zerosuperior", "onesuperior", "twosuperior", "threesuperior", "foursuperior", "fivesuperior", "sixsuperior", "sevensuperior", "eightsuperior", "ninesuperior", "zeroinferior", "oneinferior", "twoinferior", "threeinferior", "fourinferior", "fiveinferior", "sixinferior", "seveninferior", "eightinferior", "nineinferior", "centinferior", "dollarinferior", "periodinferior", "commainferior"] cffExpertSubsetStringCount = 87 assert len(cffExpertSubsetStrings) == cffExpertSubsetStringCount