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Progress reading CFF tables
This commit is contained in:
Kovid Goyal
parent
85a427af83
commit
833a8ca4e2
@ -1,153 +0,0 @@
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#!/usr/bin/env python
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# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
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from __future__ import (unicode_literals, division, absolute_import,
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print_function)
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__license__ = 'GPL v3'
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__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
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__docformat__ = 'restructuredtext en'
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from struct import unpack_from, unpack
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from calibre.utils.fonts.sfnt import UnknownTable
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from calibre.utils.fonts.sfnt.errors import UnsupportedFont
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# Useful links
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# http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf
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# http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5177.Type2.pdf
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class CFF(object):
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def __init__(self, raw):
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(self.major_version, self.minor_version, self.header_size,
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self.offset_size) = unpack_from(b'>4B', raw)
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if (self.major_version, self.minor_version) != (1, 0):
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raise UnsupportedFont('The CFF table has unknown version: '
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'(%d, %d)'%(self.major_version, self.minor_version))
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offset = self.header_size
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# Read Names Index
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self.font_names = Index(raw, offset)
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offset = self.font_names.pos
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if len(self.font_names) > 1:
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raise UnsupportedFont('CFF table has more than one font.')
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# Read Top Dict
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self.top_index = Index(raw, offset)
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offset = self.top_index.pos
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# Read strings
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self.strings = Strings(raw, offset)
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offset = self.strings.pos
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print (self.strings[len(cff_standard_strings):])
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class Index(list):
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def __init__(self, raw, offset):
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list.__init__(self)
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count = unpack_from(b'>H', raw, offset)[0]
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offset += 2
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self.pos = offset
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if count > 0:
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self.offset_size = unpack_from(b'>B', raw, offset)[0]
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offset += 1
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if self.offset_size == 3:
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offsets = [unpack(b'>L', b'\0' + raw[i:i+3])[0]
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for i in xrange(offset, 3*(count+2), 3)]
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else:
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fmt = {1:'B', 2:'H', 4:'L'}.get(self.offset_size)
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fmt = ('>%d%s'%(count+1, fmt)).encode('ascii')
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offsets = unpack_from(fmt, raw, offset)
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offset += self.offset_size * (count+1) - 1
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for i in xrange(len(offsets)-1):
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off, noff = offsets[i:i+2]
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obj = raw[offset+i:offset+noff]
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self.append(obj)
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self.pos = offset + offsets[-1]
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class Strings(Index):
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def __init__(self, raw, offset):
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super(Strings, self).__init__(raw, offset)
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for x in reversed(cff_standard_strings):
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self.insert(0, x)
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class CFFTable(UnknownTable):
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def decompile(self):
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self.cff = CFF(self.raw)
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# cff_standard_strings {{{
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# The 391 Standard Strings as used in the CFF format.
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# from Adobe Technical None #5176, version 1.0, 18 March 1998
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cff_standard_strings = [
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'.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', 'percent',
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'ampersand', 'quoteright', 'parenleft', 'parenright', 'asterisk', 'plus',
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'comma', 'hyphen', 'period', 'slash', 'zero', 'one', 'two', 'three', 'four',
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'five', 'six', 'seven', 'eight', 'nine', 'colon', 'semicolon', 'less', 'equal',
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'greater', 'question', 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
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'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
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'bracketleft', 'backslash', 'bracketright', 'asciicircum', 'underscore',
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'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
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'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'braceleft',
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'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', 'sterling',
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'fraction', 'yen', 'florin', 'section', 'currency', 'quotesingle',
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'quotedblleft', 'guillemotleft', 'guilsinglleft', 'guilsinglright', 'fi', 'fl',
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'endash', 'dagger', 'daggerdbl', 'periodcentered', 'paragraph', 'bullet',
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'quotesinglbase', 'quotedblbase', 'quotedblright', 'guillemotright',
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'ellipsis', 'perthousand', 'questiondown', 'grave', 'acute', 'circumflex',
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'tilde', 'macron', 'breve', 'dotaccent', 'dieresis', 'ring', 'cedilla',
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'hungarumlaut', 'ogonek', 'caron', 'emdash', 'AE', 'ordfeminine', 'Lslash',
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'Oslash', 'OE', 'ordmasculine', 'ae', 'dotlessi', 'lslash', 'oslash', 'oe',
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'germandbls', 'onesuperior', 'logicalnot', 'mu', 'trademark', 'Eth', 'onehalf',
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'plusminus', 'Thorn', 'onequarter', 'divide', 'brokenbar', 'degree', 'thorn',
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'threequarters', 'twosuperior', 'registered', 'minus', 'eth', 'multiply',
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'threesuperior', 'copyright', 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave',
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'Aring', 'Atilde', 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave',
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'Iacute', 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute',
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'Ocircumflex', 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute',
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'Ucircumflex', 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron',
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'aacute', 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla',
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'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex',
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'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis',
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'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', 'ugrave',
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'yacute', 'ydieresis', 'zcaron', 'exclamsmall', 'Hungarumlautsmall',
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'dollaroldstyle', 'dollarsuperior', 'ampersandsmall', 'Acutesmall',
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'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', 'onedotenleader',
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'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', 'fouroldstyle',
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'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle',
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'nineoldstyle', 'commasuperior', 'threequartersemdash', 'periodsuperior',
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'questionsmall', 'asuperior', 'bsuperior', 'centsuperior', 'dsuperior',
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'esuperior', 'isuperior', 'lsuperior', 'msuperior', 'nsuperior', 'osuperior',
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'rsuperior', 'ssuperior', 'tsuperior', 'ff', 'ffi', 'ffl', 'parenleftinferior',
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'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall',
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'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', 'Hsmall',
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'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', 'Osmall', 'Psmall',
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'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', 'Vsmall', 'Wsmall', 'Xsmall',
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'Ysmall', 'Zsmall', 'colonmonetary', 'onefitted', 'rupiah', 'Tildesmall',
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'exclamdownsmall', 'centoldstyle', 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall',
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'Dieresissmall', 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall',
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'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', 'Cedillasmall',
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'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths',
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'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'foursuperior',
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'fivesuperior', 'sixsuperior', 'sevensuperior', 'eightsuperior',
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'ninesuperior', 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior',
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'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior',
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'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior',
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'periodinferior', 'commainferior', 'Agravesmall', 'Aacutesmall',
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'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall', 'AEsmall',
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'Ccedillasmall', 'Egravesmall', 'Eacutesmall', 'Ecircumflexsmall',
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'Edieresissmall', 'Igravesmall', 'Iacutesmall', 'Icircumflexsmall',
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'Idieresissmall', 'Ethsmall', 'Ntildesmall', 'Ogravesmall', 'Oacutesmall',
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'Ocircumflexsmall', 'Otildesmall', 'Odieresissmall', 'OEsmall', 'Oslashsmall',
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'Ugravesmall', 'Uacutesmall', 'Ucircumflexsmall', 'Udieresissmall',
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'Yacutesmall', 'Thornsmall', 'Ydieresissmall', '001.000', '001.001', '001.002',
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'001.003', 'Black', 'Bold', 'Book', 'Light', 'Medium', 'Regular', 'Roman',
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'Semibold'
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]
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# }}}
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@ -28,17 +28,6 @@ cff_dict_operand_encoding[255] = "reserved"
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real_nibbles = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
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'.', 'E', 'E-', None, '-']
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class SimpleConverter(object):
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def read(self, parent, value):
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return value
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def write(self, parent, value):
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return value
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class TODO(SimpleConverter):
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pass
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class Reader(dict):
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def read_byte(self, b0, data, index):
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@ -89,20 +78,13 @@ class Dict(Reader):
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def __init__(self):
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Reader.__init__(self)
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table = self.TABLE[:]
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for i in xrange(len(table)):
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op, name, arg, default, conv = table[i]
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if conv is not None:
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continue
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if arg in ("delta", "array", 'number', 'SID'):
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conv = SimpleConverter()
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else:
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raise Exception('Should not happen')
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table[i] = op, name, arg, default, conv
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self.operators = {op:(name, arg) for op, name, arg, default in
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self.TABLE}
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self.defaults = {name:default for op, name, arg, default in self.TABLE}
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self.operators = {op:(name, arg) for op, name, arg, default, conv in
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table}
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def safe_get(self, name):
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return self.get(name, self.defaults[name])
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def decompile(self, strings, global_subrs, data):
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self.strings = strings
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@ -162,40 +144,66 @@ class Dict(Reader):
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class TopDict(Dict):
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TABLE = [
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#opcode name argument type default converter
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((12, 30), 'ROS', ('SID','SID','number'), None, SimpleConverter()),
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((12, 20), 'SyntheticBase', 'number', None, None),
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(0, 'version', 'SID', None, None),
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(1, 'Notice', 'SID', None, None),
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((12, 0), 'Copyright', 'SID', None, None),
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(2, 'FullName', 'SID', None, None),
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((12, 38), 'FontName', 'SID', None, None),
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(3, 'FamilyName', 'SID', None, None),
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(4, 'Weight', 'SID', None, None),
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((12, 1), 'isFixedPitch', 'number', 0, None),
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((12, 2), 'ItalicAngle', 'number', 0, None),
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((12, 3), 'UnderlinePosition', 'number', None, None),
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((12, 4), 'UnderlineThickness', 'number', 50, None),
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((12, 5), 'PaintType', 'number', 0, None),
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((12, 6), 'CharstringType', 'number', 2, None),
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((12, 7), 'FontMatrix', 'array', [0.001,0,0,0.001,0,0], None),
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(13, 'UniqueID', 'number', None, None),
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(5, 'FontBBox', 'array', [0,0,0,0], None),
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((12, 8), 'StrokeWidth', 'number', 0, None),
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(14, 'XUID', 'array', None, None),
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((12, 21), 'PostScript', 'SID', None, None),
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((12, 22), 'BaseFontName', 'SID', None, None),
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((12, 23), 'BaseFontBlend', 'delta', None, None),
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((12, 31), 'CIDFontVersion', 'number', 0, None),
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((12, 32), 'CIDFontRevision', 'number', 0, None),
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((12, 33), 'CIDFontType', 'number', 0, None),
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((12, 34), 'CIDCount', 'number', 8720, None),
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(15, 'charset', 'number', 0, TODO()),
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((12, 35), 'UIDBase', 'number', None, None),
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(16, 'Encoding', 'number', 0, TODO()),
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(18, 'Private', ('number','number'), None, TODO()),
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((12, 37), 'FDSelect', 'number', None, TODO()),
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((12, 36), 'FDArray', 'number', None, TODO()),
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(17, 'CharStrings', 'number', None, TODO()),
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#opcode name argument type default
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((12, 30), 'ROS', ('SID','SID','number'), None, ),
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((12, 20), 'SyntheticBase', 'number', None, ),
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(0, 'version', 'SID', None, ),
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(1, 'Notice', 'SID', None, ),
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((12, 0), 'Copyright', 'SID', None, ),
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(2, 'FullName', 'SID', None, ),
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((12, 38), 'FontName', 'SID', None, ),
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(3, 'FamilyName', 'SID', None, ),
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(4, 'Weight', 'SID', None, ),
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((12, 1), 'isFixedPitch', 'number', 0, ),
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((12, 2), 'ItalicAngle', 'number', 0, ),
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((12, 3), 'UnderlinePosition', 'number', None, ),
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((12, 4), 'UnderlineThickness', 'number', 50, ),
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((12, 5), 'PaintType', 'number', 0, ),
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((12, 6), 'CharstringType', 'number', 2, ),
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((12, 7), 'FontMatrix', 'array', [0.001,0,0,0.001,0,0], ),
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(13, 'UniqueID', 'number', None, ),
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(5, 'FontBBox', 'array', [0,0,0,0], ),
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((12, 8), 'StrokeWidth', 'number', 0, ),
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(14, 'XUID', 'array', None, ),
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((12, 21), 'PostScript', 'SID', None, ),
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((12, 22), 'BaseFontName', 'SID', None, ),
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((12, 23), 'BaseFontBlend', 'delta', None, ),
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((12, 31), 'CIDFontVersion', 'number', 0, ),
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((12, 32), 'CIDFontRevision', 'number', 0, ),
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((12, 33), 'CIDFontType', 'number', 0, ),
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((12, 34), 'CIDCount', 'number', 8720, ),
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(15, 'charset', 'number', 0, ),
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((12, 35), 'UIDBase', 'number', None, ),
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(16, 'Encoding', 'number', 0, ),
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(18, 'Private', ('number','number'), None, ),
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((12, 37), 'FDSelect', 'number', None, ),
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((12, 36), 'FDArray', 'number', None, ),
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(17, 'CharStrings', 'number', None, ),
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]
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class PrivateDict(Dict):
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TABLE = [
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# opcode name argument type default
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(6, 'BlueValues', 'delta', None, ),
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(7, 'OtherBlues', 'delta', None, ),
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(8, 'FamilyBlues', 'delta', None, ),
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(9, 'FamilyOtherBlues', 'delta', None, ),
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((12, 9), 'BlueScale', 'number', 0.039625, ),
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((12, 10), 'BlueShift', 'number', 7, ),
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((12, 11), 'BlueFuzz', 'number', 1, ),
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(10, 'StdHW', 'number', None, ),
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(11, 'StdVW', 'number', None, ),
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((12, 12), 'StemSnapH', 'delta', None, ),
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((12, 13), 'StemSnapV', 'delta', None, ),
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((12, 14), 'ForceBold', 'number', 0, ),
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((12, 15), 'ForceBoldThreshold', 'number', None, ), # deprecated
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((12, 16), 'lenIV', 'number', None, ), # deprecated
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((12, 17), 'LanguageGroup', 'number', 0, ),
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((12, 18), 'ExpansionFactor', 'number', 0.06, ),
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((12, 19), 'initialRandomSeed', 'number', 0, ),
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(20, 'defaultWidthX', 'number', 0, ),
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(21, 'nominalWidthX', 'number', 0, ),
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(19, 'Subrs', 'number', None, ),
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]
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@ -7,11 +7,12 @@ __license__ = 'GPL v3'
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__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
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__docformat__ = 'restructuredtext en'
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from struct import unpack_from, unpack
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from struct import unpack_from, unpack, calcsize
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from functools import partial
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from calibre.utils.fonts.sfnt import UnknownTable
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from calibre.utils.fonts.sfnt.errors import UnsupportedFont
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from calibre.utils.fonts.sfnt.cff.dict_data import TopDict
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from calibre.utils.fonts.sfnt.cff.dict_data import TopDict, PrivateDict
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# Useful links
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# http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf
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@ -48,8 +49,36 @@ class CFF(object):
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# Decompile Top Dict
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self.top_dict.decompile(self.strings, self.global_subrs, self.top_index[0])
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self.is_CID = 'ROS' in self.top_dict
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# Read CharStrings (Glyph definitions)
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try:
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offset = self.top_dict['CharStrings']
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except KeyError:
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raise ValueError('This font has no CharStrings')
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cs_type = self.top_dict.safe_get('CharstringType')
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if cs_type != 2:
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raise UnsupportedFont('This font has unsupported CharstringType: '
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'%s'%cs_type)
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self.char_strings = CharStringsIndex(raw, offset)
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self.num_glyphs = len(self.char_strings)
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# Read Private Dict
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self.private_dict = None
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pd = self.top_dict.safe_get('Private')
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if pd:
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size, offset = pd
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self.private_dict = PrivateDict()
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self.private_dict.decompile(self.strings, self.global_subrs,
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raw[offset:offset+size])
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# Read charset (Glyph names)
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self.charset = Charset(raw, self.top_dict.safe_get('charset'),
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self.strings, self.num_glyphs, self.is_CID)
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import pprint
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pprint.pprint(self.top_dict)
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pprint.pprint(self.private_dict)
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class Index(list):
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@ -66,9 +95,9 @@ class Index(list):
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offset += 1
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if self.offset_size == 3:
|
||||
offsets = [unpack(b'>L', b'\0' + raw[i:i+3])[0]
|
||||
for i in xrange(offset, 3*(count+2), 3)]
|
||||
for i in xrange(offset, offset+3*(count+2), 3)]
|
||||
else:
|
||||
fmt = {1:'B', 2:'H', 4:'L'}.get(self.offset_size)
|
||||
fmt = {1:'B', 2:'H', 4:'L'}[self.offset_size]
|
||||
fmt = ('>%d%s'%(count+1, fmt)).encode('ascii')
|
||||
offsets = unpack_from(fmt, raw, offset)
|
||||
offset += self.offset_size * (count+1) - 1
|
||||
@ -78,16 +107,168 @@ class Index(list):
|
||||
obj = raw[offset+off:offset+noff]
|
||||
self.append(obj)
|
||||
|
||||
self.pos = offset + offsets[-1]
|
||||
try:
|
||||
self.pos = offset + offsets[-1]
|
||||
except IndexError:
|
||||
self.pos = offset
|
||||
|
||||
class Strings(Index):
|
||||
|
||||
def __init__(self, raw, offset):
|
||||
super(Strings, self).__init__(raw, offset, prepend=cff_standard_strings)
|
||||
super(Strings, self).__init__(raw, offset, prepend=[x.encode('ascii')
|
||||
for x in cff_standard_strings])
|
||||
|
||||
class Charset(list):
|
||||
|
||||
STANDARD_CHARSETS = [ # {{{
|
||||
# ISOAdobe
|
||||
(".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"),
|
||||
|
||||
# Expert
|
||||
("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"),
|
||||
|
||||
# Expert Subset
|
||||
(".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"),
|
||||
] # }}}
|
||||
|
||||
def __init__(self, raw, offset, strings, num_glyphs, is_CID):
|
||||
super(Charset, self).__init__()
|
||||
self.standard_charset = offset if offset in {0, 1, 2} else None
|
||||
if is_CID and self.standard_charset is not None:
|
||||
raise ValueError("CID font must not use a standard charset")
|
||||
if self.standard_charset is None:
|
||||
self.append(b'.notdef')
|
||||
fmt = unpack_from(b'>B', raw, offset)[0]
|
||||
offset += 1
|
||||
f = {0:self.parse_fmt0, 1:self.parse_fmt1,
|
||||
2:partial(self.parse_fmt1, is_two_byte=True)}.get(fmt, None)
|
||||
if f is None:
|
||||
raise UnsupportedFont('This font uses unsupported charset '
|
||||
'table format: %d'%fmt)
|
||||
f(raw, offset, strings, num_glyphs, is_CID)
|
||||
|
||||
def parse_fmt0(self, raw, offset, strings, num_glyphs, is_CID):
|
||||
fmt = ('>%dH'%(num_glyphs-1)).encode('ascii')
|
||||
ids = unpack_from(fmt, raw, offset)
|
||||
if is_CID:
|
||||
ids = ('cid%05d'%x for x in ids)
|
||||
else:
|
||||
ids = (strings[x] for x in ids)
|
||||
self.extend(ids)
|
||||
|
||||
def parse_fmt1(self, raw, offset, strings, num_glyphs, is_CID,
|
||||
is_two_byte=False):
|
||||
fmt = b'>2H' if is_two_byte else b'>HB'
|
||||
sz = calcsize(fmt)
|
||||
count = 0
|
||||
while count < num_glyphs - 1:
|
||||
first, nleft = unpack_from(fmt, raw, offset)
|
||||
offset += sz
|
||||
count += nleft + 1
|
||||
self.extend('cid%05d'%x if is_CID else strings[x] for x in
|
||||
xrange(first, first + nleft+1))
|
||||
|
||||
def lookup(self, glyph_id):
|
||||
if self.standard_charset is None:
|
||||
return self[glyph_id]
|
||||
return self.STANDARD_CHARSETS[self.standard_charset][glyph_id].encode('ascii')
|
||||
|
||||
class GlobalSubrs(Index):
|
||||
pass
|
||||
|
||||
class CharStringsIndex(Index):
|
||||
pass
|
||||
|
||||
class CFFTable(UnknownTable):
|
||||
|
||||
def decompile(self):
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user