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Start work on subsetting CFF tables

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Kovid Goyal 2012-11-06 21:47:23 +05:30
parent 03ac5dc280
commit 88a0bb48e7
6 changed files with 535 additions and 1 deletions
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153
src/calibre/utils/fonts/sfnt/cff.py Normal file
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#!/usr/bin/env python
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
from __future__ import (unicode_literals, division, absolute_import,
print_function)
__license__ = 'GPL v3'
__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
from struct import unpack_from, unpack
from calibre.utils.fonts.sfnt import UnknownTable
from calibre.utils.fonts.sfnt.errors import UnsupportedFont
# Useful links
# http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf
# http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5177.Type2.pdf
class CFF(object):
def __init__(self, raw):
(self.major_version, self.minor_version, self.header_size,
self.offset_size) = unpack_from(b'>4B', raw)
if (self.major_version, self.minor_version) != (1, 0):
raise UnsupportedFont('The CFF table has unknown version: '
'(%d, %d)'%(self.major_version, self.minor_version))
offset = self.header_size
# Read Names Index
self.font_names = Index(raw, offset)
offset = self.font_names.pos
if len(self.font_names) > 1:
raise UnsupportedFont('CFF table has more than one font.')
# Read Top Dict
self.top_index = Index(raw, offset)
offset = self.top_index.pos
# Read strings
self.strings = Strings(raw, offset)
offset = self.strings.pos
print (self.strings[len(cff_standard_strings):])
class Index(list):
def __init__(self, raw, offset):
list.__init__(self)
count = unpack_from(b'>H', raw, offset)[0]
offset += 2
self.pos = offset
if count > 0:
self.offset_size = unpack_from(b'>B', raw, offset)[0]
offset += 1
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)]
else:
fmt = {1:'B', 2:'H', 4:'L'}.get(self.offset_size)
fmt = ('>%d%s'%(count+1, fmt)).encode('ascii')
offsets = unpack_from(fmt, raw, offset)
offset += self.offset_size * (count+1) - 1
for i in xrange(len(offsets)-1):
off, noff = offsets[i:i+2]
obj = raw[offset+i:offset+noff]
self.append(obj)
self.pos = offset + offsets[-1]
class Strings(Index):
def __init__(self, raw, offset):
super(Strings, self).__init__(raw, offset)
for x in reversed(cff_standard_strings):
self.insert(0, x)
class CFFTable(UnknownTable):
def decompile(self):
self.cff = CFF(self.raw)
# cff_standard_strings {{{
# The 391 Standard Strings as used in the CFF format.
# from Adobe Technical None #5176, version 1.0, 18 March 1998
cff_standard_strings = [
'.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'
]
# }}}

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src/calibre/utils/fonts/sfnt/cff/__init__.py Normal file
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#!/usr/bin/env python
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
from __future__ import (unicode_literals, division, absolute_import,
print_function)
__license__ = 'GPL v3'
__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
__docformat__ = 'restructuredtext en'

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src/calibre/utils/fonts/sfnt/cff/dict_data.py Normal file
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#!/usr/bin/env python
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
from __future__ import (unicode_literals, division, absolute_import,
print_function)
__license__ = 'GPL v3'
__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
from struct import unpack
t1_operand_encoding = [None] * 256
t1_operand_encoding[0:32] = (32) * ["do_operator"]
t1_operand_encoding[32:247] = (247 - 32) * ["read_byte"]
t1_operand_encoding[247:251] = (251 - 247) * ["read_small_int1"]
t1_operand_encoding[251:255] = (255 - 251) * ["read_small_int2"]
t1_operand_encoding[255] = "read_long_int"
t2_operand_encoding = t1_operand_encoding[:]
t2_operand_encoding[28] = "read_short_int"
t2_operand_encoding[255] = "read_fixed_1616"
cff_dict_operand_encoding = t2_operand_encoding[:]
cff_dict_operand_encoding[29] = "read_long_int"
cff_dict_operand_encoding[30] = "read_real_number"
cff_dict_operand_encoding[255] = "reserved"
real_nibbles = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'.', 'E', 'E-', None, '-']
class SimpleConverter(object):
def read(self, parent, value):
return value
def write(self, parent, value):
return value
class TODO(SimpleConverter):
pass
class Reader(dict):
def read_byte(self, b0, data, index):
return b0 - 139, index
def read_small_int1(self, b0, data, index):
b1 = ord(data[index])
return (b0-247)*256 + b1 + 108, index+1
def read_small_int2(self, b0, data, index):
b1 = ord(data[index])
return -(b0-251)*256 - b1 - 108, index+1
def read_short_int(self, b0, data, index):
bin = data[index] + data[index+1]
value, = unpack(b">h", bin)
return value, index+2
def read_long_int(self, b0, data, index):
bin = data[index] + data[index+1] + data[index+2] + data[index+3]
value, = unpack(b">l", bin)
return value, index+4
def read_fixed_1616(self, b0, data, index):
bin = data[index] + data[index+1] + data[index+2] + data[index+3]
value, = unpack(b">l", bin)
return value / 65536.0, index+4
def read_real_number(self, b0, data, index):
number = ''
while True:
b = ord(data[index])
index = index + 1
nibble0 = (b & 0xf0) >> 4
nibble1 = b & 0x0f
if nibble0 == 0xf:
break
number = number + real_nibbles[nibble0]
if nibble1 == 0xf:
break
number = number + real_nibbles[nibble1]
return float(number), index
class Dict(Reader):
operand_encoding = cff_dict_operand_encoding
TABLE = []
def __init__(self):
Reader.__init__(self)
table = self.TABLE[:]
for i in xrange(len(table)):
op, name, arg, default, conv = table[i]
if conv is not None:
continue
if arg in ("delta", "array", 'number', 'SID'):
conv = SimpleConverter()
else:
raise Exception('Should not happen')
table[i] = op, name, arg, default, conv
self.operators = {op:(name, arg) for op, name, arg, default, conv in
table}
def decompile(self, strings, data):
self.strings = strings
self.stack = []
index = 0
while index < len(data):
b0 = ord(data[index])
index += 1
handler = getattr(self, self.operand_encoding[b0])
value, index = handler(b0, data, index)
if value is not None:
self.stack.append(value)
def do_operator(self, b0, data, index):
if b0 == 12:
op = (b0, ord(data[index]))
index += 1
else:
op = b0
operator, arg_type = self.operators[op]
self.handle_operator(operator, arg_type)
return None, index
def handle_operator(self, operator, arg_type):
if isinstance(arg_type, tuple):
value = ()
for i in xrange(len(arg_type)-1, -1, -1):
arg = arg_type[i]
arghandler = getattr(self, 'arg_' + arg)
value = (arghandler(operator),) + value
else:
arghandler = getattr(self, 'arg_' + arg_type)
value = arghandler(operator)
self[operator] = value
def arg_number(self, name):
return self.stack.pop()
def arg_SID(self, name):
return self.strings[self.stack.pop()]
def arg_array(self, name):
ans = self.stack[:]
del self.stack[:]
return ans
def arg_delta(self, name):
out = []
current = 0
for v in self.stack:
current = current + v
out.append(current)
del self.stack[:]
return out
class TopDict(Dict):
TABLE = [
#opcode name argument type default converter
((12, 30), 'ROS', ('SID','SID','number'), None, SimpleConverter()),
((12, 20), 'SyntheticBase', 'number', None, None),
(0, 'version', 'SID', None, None),
(1, 'Notice', 'SID', None, None),
((12, 0), 'Copyright', 'SID', None, None),
(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', 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),
((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', 0, TODO()),
((12, 35), 'UIDBase', 'number', None, None),
(16, 'Encoding', 'number', 0, TODO()),
(18, 'Private', ('number','number'), None, TODO()),
((12, 37), 'FDSelect', 'number', None, TODO()),
((12, 36), 'FDArray', 'number', None, TODO()),
(17, 'CharStrings', 'number', None, TODO()),
]

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src/calibre/utils/fonts/sfnt/cff/table.py Normal file
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#!/usr/bin/env python
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
from __future__ import (unicode_literals, division, absolute_import,
print_function)
__license__ = 'GPL v3'
__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
from struct import unpack_from, unpack
from calibre.utils.fonts.sfnt import UnknownTable
from calibre.utils.fonts.sfnt.errors import UnsupportedFont
from calibre.utils.fonts.sfnt.cff.dict_data import TopDict
# Useful links
# http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf
# http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5177.Type2.pdf
class CFF(object):
def __init__(self, raw):
(self.major_version, self.minor_version, self.header_size,
self.offset_size) = unpack_from(b'>4B', raw)
if (self.major_version, self.minor_version) != (1, 0):
raise UnsupportedFont('The CFF table has unknown version: '
'(%d, %d)'%(self.major_version, self.minor_version))
offset = self.header_size
# Read Names Index
self.font_names = Index(raw, offset)
offset = self.font_names.pos
if len(self.font_names) > 1:
raise UnsupportedFont('CFF table has more than one font.')
# Read Top Dict
self.top_index = Index(raw, offset)
self.top_dict = TopDict()
offset = self.top_index.pos
# Read strings
self.strings = Strings(raw, offset)
offset = self.strings.pos
# Decompile Top Dict
self.top_dict.decompile(self.strings, self.top_index[0])
import pprint
pprint.pprint(self.top_dict)
class Index(list):
def __init__(self, raw, offset, prepend=()):
list.__init__(self)
self.extend(prepend)
count = unpack_from(b'>H', raw, offset)[0]
offset += 2
self.pos = offset
if count > 0:
self.offset_size = unpack_from(b'>B', raw, offset)[0]
offset += 1
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)]
else:
fmt = {1:'B', 2:'H', 4:'L'}.get(self.offset_size)
fmt = ('>%d%s'%(count+1, fmt)).encode('ascii')
offsets = unpack_from(fmt, raw, offset)
offset += self.offset_size * (count+1) - 1
for i in xrange(len(offsets)-1):
off, noff = offsets[i:i+2]
obj = raw[offset+off:offset+noff]
self.append(obj)
self.pos = offset + offsets[-1]
class Strings(Index):
def __init__(self, raw, offset):
super(Strings, self).__init__(raw, offset, prepend=cff_standard_strings)
class CFFTable(UnknownTable):
def decompile(self):
self.cff = CFF(self.raw)
# cff_standard_strings {{{
# The 391 Standard Strings as used in the CFF format.
# from Adobe Technical None #5176, version 1.0, 18 March 1998
cff_standard_strings = [
'.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'
]
# }}}

2
src/calibre/utils/fonts/sfnt/container.py
View File

@ -21,6 +21,7 @@ from calibre.utils.fonts.sfnt.maxp import MaxpTable
from calibre.utils.fonts.sfnt.loca import LocaTable from calibre.utils.fonts.sfnt.loca import LocaTable
from calibre.utils.fonts.sfnt.glyf import GlyfTable from calibre.utils.fonts.sfnt.glyf import GlyfTable
from calibre.utils.fonts.sfnt.cmap import CmapTable from calibre.utils.fonts.sfnt.cmap import CmapTable
from calibre.utils.fonts.sfnt.cff.table import CFFTable
# OpenType spec: http://www.microsoft.com/typography/otspec/otff.htm # OpenType spec: http://www.microsoft.com/typography/otspec/otff.htm
@ -42,6 +43,7 @@ class Sfnt(object):
b'loca' : LocaTable, b'loca' : LocaTable,
b'glyf' : GlyfTable, b'glyf' : GlyfTable,
b'cmap' : CmapTable, b'cmap' : CmapTable,
b'CFF ' : CFFTable,
}.get(table_tag, UnknownTable)(table) }.get(table_tag, UnknownTable)(table)
def __getitem__(self, key): def __getitem__(self, key):

11
src/calibre/utils/fonts/sfnt/subset.py
View File

@ -66,6 +66,11 @@ def subset_truetype(sfnt, character_map):
# }}} # }}}
def subset_postscript(sfnt, character_map):
cff = sfnt[b'CFF ']
cff.decompile()
raise Exception('TODO: Implement CFF subsetting')
def subset(raw, individual_chars, ranges=()): def subset(raw, individual_chars, ranges=()):
chars = list(map(ord, individual_chars)) chars = list(map(ord, individual_chars))
for r in ranges: for r in ranges:
@ -91,7 +96,11 @@ def subset(raw, individual_chars, ranges=()):
subset_truetype(sfnt, character_map) subset_truetype(sfnt, character_map)
elif b'CFF ' in sfnt: elif b'CFF ' in sfnt:
# PostScript Outlines # PostScript Outlines
raise UnsupportedFont('This font contains PostScript outlines, ' from calibre.utils.config_base import tweaks
if tweaks['subset_cff_table']:
subset_postscript(sfnt, character_map)
else:
raise UnsupportedFont('This font contains PostScript outlines, '
'subsetting not supported') 'subsetting not supported')
else: else:
raise UnsupportedFont('This font does not contain TrueType ' raise UnsupportedFont('This font does not contain TrueType '