| """cffLib.py -- read/write tools for Adobe CFF fonts.""" |
| |
| # |
| # $Id: cffLib.py,v 1.14 2002-05-16 18:38:03 jvr Exp $ |
| # |
| |
| import struct, sstruct |
| import string |
| import types |
| from fontTools.misc import psCharStrings |
| |
| |
| cffHeaderFormat = """ |
| major: B |
| minor: B |
| hdrSize: B |
| offSize: B |
| """ |
| |
| class CFFFontSet: |
| |
| def __init__(self): |
| pass |
| |
| def decompile(self, file): |
| sstruct.unpack(cffHeaderFormat, file.read(4), self) |
| assert self.major == 1 and self.minor == 0, \ |
| "unknown CFF format: %d.%d" % (self.major, self.minor) |
| |
| self.fontNames = list(Index(file)) |
| self.topDictIndex = TopDictIndex(file) |
| self.strings = IndexedStrings(list(Index(file))) |
| self.GlobalSubrs = SubrsIndex(file) |
| self.topDictIndex.strings = self.strings |
| self.topDictIndex.GlobalSubrs = self.GlobalSubrs |
| |
| def __len__(self): |
| return len(self.fontNames) |
| |
| def keys(self): |
| return self.fontNames[:] |
| |
| def __getitem__(self, name): |
| try: |
| index = self.fontNames.index(name) |
| except ValueError: |
| raise KeyError, name |
| return self.topDictIndex[index] |
| |
| def compile(self): |
| strings = IndexedStrings() |
| XXXX |
| |
| def toXML(self, xmlWriter, progress=None): |
| xmlWriter.newline() |
| for fontName in self.fontNames: |
| xmlWriter.begintag("CFFFont", name=fontName) |
| xmlWriter.newline() |
| font = self[fontName] |
| font.toXML(xmlWriter, progress) |
| xmlWriter.endtag("CFFFont") |
| xmlWriter.newline() |
| xmlWriter.newline() |
| xmlWriter.begintag("GlobalSubrs") |
| xmlWriter.newline() |
| self.GlobalSubrs.toXML(xmlWriter, progress) |
| xmlWriter.endtag("GlobalSubrs") |
| xmlWriter.newline() |
| xmlWriter.newline() |
| |
| def fromXML(self, (name, attrs, content)): |
| xxx |
| |
| |
| class Index: |
| |
| """This class represents what the CFF spec calls an INDEX.""" |
| |
| def __init__(self, file): |
| self.file = file |
| count, = struct.unpack(">H", file.read(2)) |
| self.count = count |
| self.items = [None] * count |
| if count == 0: |
| self.offsets = [] |
| return |
| offSize = ord(file.read(1)) |
| self.offsets = offsets = [] |
| pad = '\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 |
| |
| def __len__(self): |
| return self.count |
| |
| 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(data, file, offset, size) |
| self.items[index] = item |
| return item |
| |
| def produceItem(self, data, file, offset, size): |
| return data |
| |
| |
| class SubrsIndex(Index): |
| |
| def produceItem(self, data, file, offset, size): |
| return psCharStrings.T2CharString(data) |
| |
| def toXML(self, xmlWriter, progress): |
| for i in range(len(self)): |
| xmlWriter.begintag("CharString", index=i) |
| xmlWriter.newline() |
| self[i].toXML(xmlWriter) |
| xmlWriter.endtag("CharString") |
| xmlWriter.newline() |
| |
| |
| class CharStrings: |
| |
| def __init__(self, file, charset): |
| self.charStringsIndex = SubrsIndex(file) |
| self.nameToIndex = nameToIndex = {} |
| for i in range(len(charset)): |
| nameToIndex[charset[i]] = i |
| |
| def keys(self): |
| return self.nameToIndex.keys() |
| |
| def values(self): |
| return list(self.charStringsIndex) |
| |
| def has_key(self, name): |
| return self.nameToIndex.has_key(name) |
| |
| def __getitem__(self, name): |
| index = self.nameToIndex[name] |
| return self.charStringsIndex[index] |
| |
| def toXML(self, xmlWriter, progress): |
| names = self.keys() |
| names.sort() |
| for name in names: |
| xmlWriter.begintag("CharString", name=name) |
| xmlWriter.newline() |
| self[name].toXML(xmlWriter) |
| xmlWriter.endtag("CharString") |
| xmlWriter.newline() |
| |
| |
| class TopDictIndex(Index): |
| def produceItem(self, data, file, offset, size): |
| top = TopDict(self.strings, file, offset, self.GlobalSubrs) |
| top.decompile(data) |
| return top |
| |
| |
| def buildOperatorDict(table): |
| d = {} |
| for op, name, arg, default, conv in table: |
| d[op] = (name, 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 PrivateDictConverter: |
| def read(self, parent, value): |
| size, offset = value |
| file = parent.file |
| pr = PrivateDict(parent.strings, file, offset) |
| file.seek(offset) |
| data = file.read(size) |
| len(data) == size |
| pr.decompile(data) |
| return pr |
| def xmlWrite(self, xmlWriter, name, value): |
| xmlWriter.begintag(name) |
| xmlWriter.newline() |
| value.toXML(xmlWriter, None) |
| xmlWriter.endtag(name) |
| xmlWriter.newline() |
| |
| class SubrsConverter(PrivateDictConverter): |
| def read(self, parent, value): |
| file = parent.file |
| file.seek(parent.offset + value) # Offset(self) |
| return SubrsIndex(file) |
| |
| class CharStringsConverter(PrivateDictConverter): |
| def read(self, parent, value): |
| file = parent.file |
| file.seek(value) # Offset(0) |
| return CharStrings(file, parent.charset) |
| |
| class CharsetConverter: |
| def read(self, parent, value): |
| isCID = hasattr(parent, "ROS") |
| if value > 2: |
| numGlyphs = parent.numGlyphs |
| file = parent.file |
| file.seek(value) |
| format = ord(file.read(1)) |
| if format == 0: |
| raise NotImplementedError |
| elif format == 1 or format == 2: |
| charset = parseCharset(numGlyphs, file, parent.strings, isCID, format) |
| elif format == 3: |
| raise NotImplementedError |
| else: |
| raise NotImplementedError |
| assert len(charset) == numGlyphs |
| else: |
| if isCID: |
| assert value == 0 |
| charset = None |
| elif value == 0: |
| charset = ISOAdobe |
| elif value == 1: |
| charset = Expert |
| elif value == 2: |
| charset = ExpertSubset |
| # self.charset: |
| # 0: ISOAdobe (or CID font!) |
| # 1: Expert |
| # 2: ExpertSubset |
| charset = None # |
| return charset |
| def xmlWrite(self, xmlWriter, name, value): |
| # XXX GlyphOrder needs to be stored *somewhere*, but not here... |
| xmlWriter.simpletag("charset", value=value) |
| xmlWriter.newline() |
| |
| |
| def parseCharset(numGlyphs, file, strings, isCID, format): |
| charset = ['.notdef'] |
| count = 1 |
| if format == 1: |
| def nLeftFunc(file): |
| return ord(file.read(1)) |
| else: |
| def nLeftFunc(file): |
| return struct.unpack(">H", file.read(2))[0] |
| while count < numGlyphs: |
| first, = struct.unpack(">H", file.read(2)) |
| nLeft = nLeftFunc(file) |
| if isCID: |
| for CID in range(first, first+nLeft+1): |
| charset.append(CID) |
| else: |
| for SID in range(first, first+nLeft+1): |
| charset.append(strings[SID]) |
| count = count + nLeft + 1 |
| return charset |
| |
| |
| topDictOperators = [ |
| # opcode name argument type default converter |
| (0, 'version', 'SID', None, None), |
| (1, 'Notice', 'SID', None, None), |
| ((12, 0), 'Copyright', 'SID', None, None), |
| (2, 'FullName', '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', None, 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), |
| (15, 'charset', 'number', 0, CharsetConverter()), |
| (16, 'Encoding', 'number', 0, None), |
| (18, 'Private', ('number','number'), None, PrivateDictConverter()), |
| (17, 'CharStrings', 'number', None, CharStringsConverter()), # XXX |
| ((12, 20), 'SyntheticBase', 'number', None, None), |
| ((12, 21), 'PostScript', 'SID', None, None), |
| ((12, 22), 'BaseFontName', 'SID', None, None), |
| ((12, 23), 'BaseFontBlend', 'delta', None, None), |
| ((12, 30), 'ROS', ('SID','SID','number'), 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), |
| ((12, 35), 'UIDBase', 'number', None, None), |
| ((12, 36), 'FDArray', 'number', None, None), |
| ((12, 37), 'FDSelect', 'number', None, None), |
| ((12, 38), 'FontName', 'SID', None, None), |
| ] |
| |
| privateDictOperators = [ |
| # opcode name argument type default converter |
| (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, 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()), |
| ] |
| |
| |
| class TopDictDecompiler(psCharStrings.DictDecompiler): |
| operators = buildOperatorDict(topDictOperators) |
| |
| |
| class PrivateDictDecompiler(psCharStrings.DictDecompiler): |
| operators = buildOperatorDict(privateDictOperators) |
| |
| |
| |
| class BaseDict: |
| |
| def __init__(self, strings, file, offset): |
| self.rawDict = {} |
| self.file = file |
| self.offset = offset |
| self.strings = strings |
| |
| def decompile(self, data): |
| dec = self.decompiler(self.strings) |
| dec.decompile(data) |
| self.rawDict = dec.getDict() |
| self.postDecompile() |
| |
| def postDecompile(self): |
| pass |
| |
| def __getattr__(self, name): |
| value = self.rawDict.get(name) |
| if value is None: |
| value = self.defaults.get(name) |
| if value is None: |
| raise AttributeError, name |
| conv = self.converters[name] |
| if conv is not None: |
| value = conv.read(self, value) |
| setattr(self, name, value) |
| return value |
| |
| def toXML(self, xmlWriter, progress): |
| for name in self.order: |
| value = getattr(self, name, None) |
| if value is None: |
| continue |
| conv = self.converters.get(name) |
| if conv is not None: |
| conv.xmlWrite(xmlWriter, name, value) |
| else: |
| if isinstance(value, types.ListType): |
| value = " ".join(map(str, value)) |
| xmlWriter.simpletag(name, value=value) |
| xmlWriter.newline() |
| |
| |
| class TopDict(BaseDict): |
| |
| defaults = buildDefaults(topDictOperators) |
| converters = buildConverters(topDictOperators) |
| order = buildOrder(topDictOperators) |
| decompiler = TopDictDecompiler |
| |
| def __init__(self, strings, file, offset, GlobalSubrs): |
| BaseDict.__init__(self, strings, file, offset) |
| self.GlobalSubrs = GlobalSubrs |
| |
| def getGlyphOrder(self): |
| 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) |
| self.numGlyphs, = struct.unpack(">H", self.file.read(2)) |
| |
| def toXML(self, xmlWriter, progress): |
| self.decompileAllCharStrings() |
| BaseDict.toXML(self, xmlWriter, progress) |
| def decompileAllCharStrings(self): |
| if self.CharstringType == 2: |
| # Type 2 CharStrings |
| decompiler = psCharStrings.SimpleT2Decompiler(self.Private.Subrs, self.GlobalSubrs) |
| for charString in self.CharStrings.values(): |
| if charString.needsDecompilation(): |
| decompiler.reset() |
| decompiler.execute(charString) |
| else: |
| # Type 1 CharStrings |
| for charString in self.CharStrings.values(): |
| charString.decompile() |
| |
| |
| class PrivateDict(BaseDict): |
| defaults = buildDefaults(privateDictOperators) |
| converters = buildConverters(privateDictOperators) |
| order = buildOrder(privateDictOperators) |
| decompiler = PrivateDictDecompiler |
| |
| |
| |
| # SID |
| |
| class IndexedStrings: |
| |
| def __init__(self, strings=None): |
| if strings is None: |
| strings = [] |
| self.strings = 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() |
| if cffStandardStringMapping.has_key(s): |
| SID = cffStandardStringMapping[s] |
| if self.stringMapping.has_key(s): |
| 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 |
| |
| |