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pdf.js/src/core/cff_parser.js

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Extract `CFFParser` from fonts.js (issue 6777)
2016-04-01 02:53:07 +09:00
/* Copyright 2016 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
define('pdfjs/core/cff_parser', ['exports', 'pdfjs/shared/util',
'pdfjs/core/charsets', 'pdfjs/core/encodings'], factory);
} else if (typeof exports !== 'undefined') {
factory(exports, require('../shared/util.js'), require('./charsets.js'),
require('./encodings.js'));
} else {
factory((root.pdfjsCoreCFFParser = {}), root.pdfjsSharedUtil,
root.pdfjsCoreCharsets, root.pdfjsCoreEncodings);
}
}(this, function (exports, sharedUtil, coreCharsets, coreEncodings) {
var error = sharedUtil.error;
var info = sharedUtil.info;
var bytesToString = sharedUtil.bytesToString;
var warn = sharedUtil.warn;
var isArray = sharedUtil.isArray;
var Util = sharedUtil.Util;
var stringToBytes = sharedUtil.stringToBytes;
var assert = sharedUtil.assert;
var ISOAdobeCharset = coreCharsets.ISOAdobeCharset;
var ExpertCharset = coreCharsets.ExpertCharset;
var ExpertSubsetCharset = coreCharsets.ExpertSubsetCharset;
var StandardEncoding = coreEncodings.StandardEncoding;
var ExpertEncoding = coreEncodings.ExpertEncoding;
// Maximum subroutine call depth of type 2 chartrings. Matches OTS.
var MAX_SUBR_NESTING = 10;
/**
* The CFF class takes a Type1 file and wrap it into a
* 'Compact Font Format' which itself embed Type2 charstrings.
*/
var 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'
];
var CFFParser = (function CFFParserClosure() {
var CharstringValidationData = [
null,
{ id: 'hstem', min: 2, stackClearing: true, stem: true },
null,
{ id: 'vstem', min: 2, stackClearing: true, stem: true },
{ id: 'vmoveto', min: 1, stackClearing: true },
{ id: 'rlineto', min: 2, resetStack: true },
{ id: 'hlineto', min: 1, resetStack: true },
{ id: 'vlineto', min: 1, resetStack: true },
{ id: 'rrcurveto', min: 6, resetStack: true },
null,
{ id: 'callsubr', min: 1, undefStack: true },
{ id: 'return', min: 0, undefStack: true },
null, // 12
null,
{ id: 'endchar', min: 0, stackClearing: true },
null,
null,
null,
{ id: 'hstemhm', min: 2, stackClearing: true, stem: true },
{ id: 'hintmask', min: 0, stackClearing: true },
{ id: 'cntrmask', min: 0, stackClearing: true },
{ id: 'rmoveto', min: 2, stackClearing: true },
{ id: 'hmoveto', min: 1, stackClearing: true },
{ id: 'vstemhm', min: 2, stackClearing: true, stem: true },
{ id: 'rcurveline', min: 8, resetStack: true },
{ id: 'rlinecurve', min: 8, resetStack: true },
{ id: 'vvcurveto', min: 4, resetStack: true },
{ id: 'hhcurveto', min: 4, resetStack: true },
null, // shortint
{ id: 'callgsubr', min: 1, undefStack: true },
{ id: 'vhcurveto', min: 4, resetStack: true },
{ id: 'hvcurveto', min: 4, resetStack: true }
];
var CharstringValidationData12 = [
null,
null,
null,
{ id: 'and', min: 2, stackDelta: -1 },
{ id: 'or', min: 2, stackDelta: -1 },
{ id: 'not', min: 1, stackDelta: 0 },
null,
null,
null,
{ id: 'abs', min: 1, stackDelta: 0 },
{ id: 'add', min: 2, stackDelta: -1,
stackFn: function stack_div(stack, index) {
stack[index - 2] = stack[index - 2] + stack[index - 1];
}
},
{ id: 'sub', min: 2, stackDelta: -1,
stackFn: function stack_div(stack, index) {
stack[index - 2] = stack[index - 2] - stack[index - 1];
}
},
{ id: 'div', min: 2, stackDelta: -1,
stackFn: function stack_div(stack, index) {
stack[index - 2] = stack[index - 2] / stack[index - 1];
}
},
null,
{ id: 'neg', min: 1, stackDelta: 0,
stackFn: function stack_div(stack, index) {
stack[index - 1] = -stack[index - 1];
}
},
{ id: 'eq', min: 2, stackDelta: -1 },
null,
null,
{ id: 'drop', min: 1, stackDelta: -1 },
null,
{ id: 'put', min: 2, stackDelta: -2 },
{ id: 'get', min: 1, stackDelta: 0 },
{ id: 'ifelse', min: 4, stackDelta: -3 },
{ id: 'random', min: 0, stackDelta: 1 },
{ id: 'mul', min: 2, stackDelta: -1,
stackFn: function stack_div(stack, index) {
stack[index - 2] = stack[index - 2] * stack[index - 1];
}
},
null,
{ id: 'sqrt', min: 1, stackDelta: 0 },
{ id: 'dup', min: 1, stackDelta: 1 },
{ id: 'exch', min: 2, stackDelta: 0 },
{ id: 'index', min: 2, stackDelta: 0 },
{ id: 'roll', min: 3, stackDelta: -2 },
null,
null,
null,
{ id: 'hflex', min: 7, resetStack: true },
{ id: 'flex', min: 13, resetStack: true },
{ id: 'hflex1', min: 9, resetStack: true },
{ id: 'flex1', min: 11, resetStack: true }
];
function CFFParser(file, properties, seacAnalysisEnabled) {
this.bytes = file.getBytes();
this.properties = properties;
this.seacAnalysisEnabled = !!seacAnalysisEnabled;
}
CFFParser.prototype = {
parse: function CFFParser_parse() {
var properties = this.properties;
var cff = new CFF();
this.cff = cff;
// The first five sections must be in order, all the others are reached
// via offsets contained in one of the below.
var header = this.parseHeader();
var nameIndex = this.parseIndex(header.endPos);
var topDictIndex = this.parseIndex(nameIndex.endPos);
var stringIndex = this.parseIndex(topDictIndex.endPos);
var globalSubrIndex = this.parseIndex(stringIndex.endPos);
var topDictParsed = this.parseDict(topDictIndex.obj.get(0));
var topDict = this.createDict(CFFTopDict, topDictParsed, cff.strings);
cff.header = header.obj;
cff.names = this.parseNameIndex(nameIndex.obj);
cff.strings = this.parseStringIndex(stringIndex.obj);
cff.topDict = topDict;
cff.globalSubrIndex = globalSubrIndex.obj;
this.parsePrivateDict(cff.topDict);
cff.isCIDFont = topDict.hasName('ROS');
var charStringOffset = topDict.getByName('CharStrings');
var charStringIndex = this.parseIndex(charStringOffset).obj;
var fontMatrix = topDict.getByName('FontMatrix');
if (fontMatrix) {
properties.fontMatrix = fontMatrix;
}
var fontBBox = topDict.getByName('FontBBox');
if (fontBBox) {
// adjusting ascent/descent
properties.ascent = fontBBox[3];
properties.descent = fontBBox[1];
properties.ascentScaled = true;
}
var charset, encoding;
if (cff.isCIDFont) {
var fdArrayIndex = this.parseIndex(topDict.getByName('FDArray')).obj;
for (var i = 0, ii = fdArrayIndex.count; i < ii; ++i) {
var dictRaw = fdArrayIndex.get(i);
var fontDict = this.createDict(CFFTopDict, this.parseDict(dictRaw),
cff.strings);
this.parsePrivateDict(fontDict);
cff.fdArray.push(fontDict);
}
// cid fonts don't have an encoding
encoding = null;
charset = this.parseCharsets(topDict.getByName('charset'),
charStringIndex.count, cff.strings, true);
cff.fdSelect = this.parseFDSelect(topDict.getByName('FDSelect'),
charStringIndex.count);
} else {
charset = this.parseCharsets(topDict.getByName('charset'),
charStringIndex.count, cff.strings, false);
encoding = this.parseEncoding(topDict.getByName('Encoding'),
properties,
cff.strings, charset.charset);
}
cff.charset = charset;
cff.encoding = encoding;
var charStringsAndSeacs = this.parseCharStrings(
charStringIndex,
topDict.privateDict.subrsIndex,
globalSubrIndex.obj,
cff.fdSelect,
cff.fdArray);
cff.charStrings = charStringsAndSeacs.charStrings;
cff.seacs = charStringsAndSeacs.seacs;
cff.widths = charStringsAndSeacs.widths;
return cff;
},
parseHeader: function CFFParser_parseHeader() {
var bytes = this.bytes;
var bytesLength = bytes.length;
var offset = 0;
// Prevent an infinite loop, by checking that the offset is within the
// bounds of the bytes array. Necessary in empty, or invalid, font files.
while (offset < bytesLength && bytes[offset] !== 1) {
++offset;
}
if (offset >= bytesLength) {
error('Invalid CFF header');
} else if (offset !== 0) {
info('cff data is shifted');
bytes = bytes.subarray(offset);
this.bytes = bytes;
}
var major = bytes[0];
var minor = bytes[1];
var hdrSize = bytes[2];
var offSize = bytes[3];
var header = new CFFHeader(major, minor, hdrSize, offSize);
return { obj: header, endPos: hdrSize };
},
parseDict: function CFFParser_parseDict(dict) {
var pos = 0;
function parseOperand() {
var value = dict[pos++];
if (value === 30) {
return parseFloatOperand(pos);
} else if (value === 28) {
value = dict[pos++];
value = ((value << 24) | (dict[pos++] << 16)) >> 16;
return value;
} else if (value === 29) {
value = dict[pos++];
value = (value << 8) | dict[pos++];
value = (value << 8) | dict[pos++];
value = (value << 8) | dict[pos++];
return value;
} else if (value >= 32 && value <= 246) {
return value - 139;
} else if (value >= 247 && value <= 250) {
return ((value - 247) * 256) + dict[pos++] + 108;
} else if (value >= 251 && value <= 254) {
return -((value - 251) * 256) - dict[pos++] - 108;
} else {
error('255 is not a valid DICT command');
}
return -1;
}
function parseFloatOperand() {
var str = '';
var eof = 15;
var lookup = ['0', '1', '2', '3', '4', '5', '6', '7', '8',
'9', '.', 'E', 'E-', null, '-'];
var length = dict.length;
while (pos < length) {
var b = dict[pos++];
var b1 = b >> 4;
var b2 = b & 15;
if (b1 === eof) {
break;
}
str += lookup[b1];
if (b2 === eof) {
break;
}
str += lookup[b2];
}
return parseFloat(str);
}
var operands = [];
var entries = [];
pos = 0;
var end = dict.length;
while (pos < end) {
var b = dict[pos];
if (b <= 21) {
if (b === 12) {
b = (b << 8) | dict[++pos];
}
entries.push([b, operands]);
operands = [];
++pos;
} else {
operands.push(parseOperand());
}
}
return entries;
},
parseIndex: function CFFParser_parseIndex(pos) {
var cffIndex = new CFFIndex();
var bytes = this.bytes;
var count = (bytes[pos++] << 8) | bytes[pos++];
var offsets = [];
var end = pos;
var i, ii;
if (count !== 0) {
var offsetSize = bytes[pos++];
// add 1 for offset to determine size of last object
var startPos = pos + ((count + 1) * offsetSize) - 1;
for (i = 0, ii = count + 1; i < ii; ++i) {
var offset = 0;
for (var j = 0; j < offsetSize; ++j) {
offset <<= 8;
offset += bytes[pos++];
}
offsets.push(startPos + offset);
}
end = offsets[count];
}
for (i = 0, ii = offsets.length - 1; i < ii; ++i) {
var offsetStart = offsets[i];
var offsetEnd = offsets[i + 1];
cffIndex.add(bytes.subarray(offsetStart, offsetEnd));
}
return {obj: cffIndex, endPos: end};
},
parseNameIndex: function CFFParser_parseNameIndex(index) {
var names = [];
for (var i = 0, ii = index.count; i < ii; ++i) {
var name = index.get(i);
// OTS doesn't allow names to be over 127 characters.
var length = Math.min(name.length, 127);
var data = [];
// OTS also only permits certain characters in the name.
for (var j = 0; j < length; ++j) {
var c = name[j];
if (j === 0 && c === 0) {
data[j] = c;
continue;
}
if ((c < 33 || c > 126) || c === 91 /* [ */ || c === 93 /* ] */ ||
c === 40 /* ( */ || c === 41 /* ) */ || c === 123 /* { */ ||
c === 125 /* } */ || c === 60 /* < */ || c === 62 /* > */ ||
c === 47 /* / */ || c === 37 /* % */ || c === 35 /* # */) {
data[j] = 95;
continue;
}
data[j] = c;
}
names.push(bytesToString(data));
}
return names;
},
parseStringIndex: function CFFParser_parseStringIndex(index) {
var strings = new CFFStrings();
for (var i = 0, ii = index.count; i < ii; ++i) {
var data = index.get(i);
strings.add(bytesToString(data));
}
return strings;
},
createDict: function CFFParser_createDict(Type, dict, strings) {
var cffDict = new Type(strings);
for (var i = 0, ii = dict.length; i < ii; ++i) {
var pair = dict[i];
var key = pair[0];
var value = pair[1];
cffDict.setByKey(key, value);
}
return cffDict;
},
parseCharString: function CFFParser_parseCharString(state, data,
localSubrIndex,
globalSubrIndex) {
if (state.callDepth > MAX_SUBR_NESTING) {
return false;
}
var stackSize = state.stackSize;
var stack = state.stack;
var length = data.length;
for (var j = 0; j < length;) {
var value = data[j++];
var validationCommand = null;
if (value === 12) {
var q = data[j++];
if (q === 0) {
// The CFF specification state that the 'dotsection' command
// (12, 0) is deprecated and treated as a no-op, but all Type2
// charstrings processors should support them. Unfortunately
// the font sanitizer don't. As a workaround the sequence (12, 0)
// is replaced by a useless (0, hmoveto).
data[j - 2] = 139;
data[j - 1] = 22;
stackSize = 0;
} else {
validationCommand = CharstringValidationData12[q];
}
} else if (value === 28) { // number (16 bit)
stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16)) >> 16;
j += 2;
stackSize++;
} else if (value === 14) {
if (stackSize >= 4) {
stackSize -= 4;
if (this.seacAnalysisEnabled) {
state.seac = stack.slice(stackSize, stackSize + 4);
return false;
}
}
validationCommand = CharstringValidationData[value];
} else if (value >= 32 && value <= 246) { // number
stack[stackSize] = value - 139;
stackSize++;
} else if (value >= 247 && value <= 254) { // number (+1 bytes)
stack[stackSize] = (value < 251 ?
((value - 247) << 8) + data[j] + 108 :
-((value - 251) << 8) - data[j] - 108);
j++;
stackSize++;
} else if (value === 255) { // number (32 bit)
stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16) |
(data[j + 2] << 8) | data[j + 3]) / 65536;
j += 4;
stackSize++;
} else if (value === 19 || value === 20) {
state.hints += stackSize >> 1;
// skipping right amount of hints flag data
j += (state.hints + 7) >> 3;
stackSize %= 2;
validationCommand = CharstringValidationData[value];
} else if (value === 10 || value === 29) {
var subrsIndex;
if (value === 10) {
subrsIndex = localSubrIndex;
} else {
subrsIndex = globalSubrIndex;
}
if (!subrsIndex) {
validationCommand = CharstringValidationData[value];
warn('Missing subrsIndex for ' + validationCommand.id);
return false;
}
var bias = 32768;
if (subrsIndex.count < 1240) {
bias = 107;
} else if (subrsIndex.count < 33900) {
bias = 1131;
}
var subrNumber = stack[--stackSize] + bias;
if (subrNumber < 0 || subrNumber >= subrsIndex.count) {
validationCommand = CharstringValidationData[value];
warn('Out of bounds subrIndex for ' + validationCommand.id);
return false;
}
state.stackSize = stackSize;
state.callDepth++;
var valid = this.parseCharString(state, subrsIndex.get(subrNumber),
localSubrIndex, globalSubrIndex);
if (!valid) {
return false;
}
state.callDepth--;
stackSize = state.stackSize;
continue;
} else if (value === 11) {
state.stackSize = stackSize;
return true;
} else {
validationCommand = CharstringValidationData[value];
}
if (validationCommand) {
if (validationCommand.stem) {
state.hints += stackSize >> 1;
}
if ('min' in validationCommand) {
if (!state.undefStack && stackSize < validationCommand.min) {
warn('Not enough parameters for ' + validationCommand.id +
'; actual: ' + stackSize +
', expected: ' + validationCommand.min);
return false;
}
}
if (state.firstStackClearing && validationCommand.stackClearing) {
state.firstStackClearing = false;
// the optional character width can be found before the first
// stack-clearing command arguments
stackSize -= validationCommand.min;
if (stackSize >= 2 && validationCommand.stem) {
// there are even amount of arguments for stem commands
stackSize %= 2;
} else if (stackSize > 1) {
warn('Found too many parameters for stack-clearing command');
}
if (stackSize > 0 && stack[stackSize - 1] >= 0) {
state.width = stack[stackSize - 1];
}
}
if ('stackDelta' in validationCommand) {
if ('stackFn' in validationCommand) {
validationCommand.stackFn(stack, stackSize);
}
stackSize += validationCommand.stackDelta;
} else if (validationCommand.stackClearing) {
stackSize = 0;
} else if (validationCommand.resetStack) {
stackSize = 0;
state.undefStack = false;
} else if (validationCommand.undefStack) {
stackSize = 0;
state.undefStack = true;
state.firstStackClearing = false;
}
}
}
state.stackSize = stackSize;
return true;
},
parseCharStrings: function CFFParser_parseCharStrings(charStrings,
localSubrIndex,
globalSubrIndex,
fdSelect,
fdArray) {
var seacs = [];
var widths = [];
var count = charStrings.count;
for (var i = 0; i < count; i++) {
var charstring = charStrings.get(i);
var state = {
callDepth: 0,
stackSize: 0,
stack: [],
undefStack: true,
hints: 0,
firstStackClearing: true,
seac: null,
width: null
};
var valid = true;
var localSubrToUse = null;
if (fdSelect && fdArray.length) {
var fdIndex = fdSelect.getFDIndex(i);
if (fdIndex === -1) {
warn('Glyph index is not in fd select.');
valid = false;
}
if (fdIndex >= fdArray.length) {
warn('Invalid fd index for glyph index.');
valid = false;
}
if (valid) {
localSubrToUse = fdArray[fdIndex].privateDict.subrsIndex;
}
} else if (localSubrIndex) {
localSubrToUse = localSubrIndex;
}
if (valid) {
valid = this.parseCharString(state, charstring, localSubrToUse,
globalSubrIndex);
}
if (state.width !== null) {
widths[i] = state.width;
}
if (state.seac !== null) {
seacs[i] = state.seac;
}
if (!valid) {
// resetting invalid charstring to single 'endchar'
charStrings.set(i, new Uint8Array([14]));
}
}
return { charStrings: charStrings, seacs: seacs, widths: widths };
},
emptyPrivateDictionary:
function CFFParser_emptyPrivateDictionary(parentDict) {
var privateDict = this.createDict(CFFPrivateDict, [],
parentDict.strings);
parentDict.setByKey(18, [0, 0]);
parentDict.privateDict = privateDict;
},
parsePrivateDict: function CFFParser_parsePrivateDict(parentDict) {
// no private dict, do nothing
if (!parentDict.hasName('Private')) {
this.emptyPrivateDictionary(parentDict);
return;
}
var privateOffset = parentDict.getByName('Private');
// make sure the params are formatted correctly
if (!isArray(privateOffset) || privateOffset.length !== 2) {
parentDict.removeByName('Private');
return;
}
var size = privateOffset[0];
var offset = privateOffset[1];
// remove empty dicts or ones that refer to invalid location
if (size === 0 || offset >= this.bytes.length) {
this.emptyPrivateDictionary(parentDict);
return;
}
var privateDictEnd = offset + size;
var dictData = this.bytes.subarray(offset, privateDictEnd);
var dict = this.parseDict(dictData);
var privateDict = this.createDict(CFFPrivateDict, dict,
parentDict.strings);
parentDict.privateDict = privateDict;
// Parse the Subrs index also since it's relative to the private dict.
if (!privateDict.getByName('Subrs')) {
return;
}
var subrsOffset = privateDict.getByName('Subrs');
var relativeOffset = offset + subrsOffset;
// Validate the offset.
if (subrsOffset === 0 || relativeOffset >= this.bytes.length) {
this.emptyPrivateDictionary(parentDict);
return;
}
var subrsIndex = this.parseIndex(relativeOffset);
privateDict.subrsIndex = subrsIndex.obj;
},
parseCharsets: function CFFParser_parseCharsets(pos, length, strings, cid) {
if (pos === 0) {
return new CFFCharset(true, CFFCharsetPredefinedTypes.ISO_ADOBE,
ISOAdobeCharset);
} else if (pos === 1) {
return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT,
ExpertCharset);
} else if (pos === 2) {
return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT_SUBSET,
ExpertSubsetCharset);
}
var bytes = this.bytes;
var start = pos;
var format = bytes[pos++];
var charset = ['.notdef'];
var id, count, i;
// subtract 1 for the .notdef glyph
length -= 1;
switch (format) {
case 0:
for (i = 0; i < length; i++) {
id = (bytes[pos++] << 8) | bytes[pos++];
charset.push(cid ? id : strings.get(id));
}
break;
case 1:
while (charset.length <= length) {
id = (bytes[pos++] << 8) | bytes[pos++];
count = bytes[pos++];
for (i = 0; i <= count; i++) {
charset.push(cid ? id++ : strings.get(id++));
}
}
break;
case 2:
while (charset.length <= length) {
id = (bytes[pos++] << 8) | bytes[pos++];
count = (bytes[pos++] << 8) | bytes[pos++];
for (i = 0; i <= count; i++) {
charset.push(cid ? id++ : strings.get(id++));
}
}
break;
default:
error('Unknown charset format');
}
// Raw won't be needed if we actually compile the charset.
var end = pos;
var raw = bytes.subarray(start, end);
return new CFFCharset(false, format, charset, raw);
},
parseEncoding: function CFFParser_parseEncoding(pos,
properties,
strings,
charset) {
var encoding = Object.create(null);
var bytes = this.bytes;
var predefined = false;
var hasSupplement = false;
var format, i, ii;
var raw = null;
function readSupplement() {
var supplementsCount = bytes[pos++];
for (i = 0; i < supplementsCount; i++) {
var code = bytes[pos++];
var sid = (bytes[pos++] << 8) + (bytes[pos++] & 0xff);
encoding[code] = charset.indexOf(strings.get(sid));
}
}
if (pos === 0 || pos === 1) {
predefined = true;
format = pos;
var baseEncoding = pos ? ExpertEncoding : StandardEncoding;
for (i = 0, ii = charset.length; i < ii; i++) {
var index = baseEncoding.indexOf(charset[i]);
if (index !== -1) {
encoding[index] = i;
}
}
} else {
var dataStart = pos;
format = bytes[pos++];
switch (format & 0x7f) {
case 0:
var glyphsCount = bytes[pos++];
for (i = 1; i <= glyphsCount; i++) {
encoding[bytes[pos++]] = i;
}
break;
case 1:
var rangesCount = bytes[pos++];
var gid = 1;
for (i = 0; i < rangesCount; i++) {
var start = bytes[pos++];
var left = bytes[pos++];
for (var j = start; j <= start + left; j++) {
encoding[j] = gid++;
}
}
break;
default:
error('Unknow encoding format: ' + format + ' in CFF');
break;
}
var dataEnd = pos;
if (format & 0x80) {
// The font sanitizer does not support CFF encoding with a
// supplement, since the encoding is not really used to map
// between gid to glyph, let's overwrite what is declared in
// the top dictionary to let the sanitizer think the font use
// StandardEncoding, that's a lie but that's ok.
bytes[dataStart] &= 0x7f;
readSupplement();
hasSupplement = true;
}
raw = bytes.subarray(dataStart, dataEnd);
}
format = format & 0x7f;
return new CFFEncoding(predefined, format, encoding, raw);
},
parseFDSelect: function CFFParser_parseFDSelect(pos, length) {
var start = pos;
var bytes = this.bytes;
var format = bytes[pos++];
var fdSelect = [];
var i;
switch (format) {
case 0:
for (i = 0; i < length; ++i) {
var id = bytes[pos++];
fdSelect.push(id);
}
break;
case 3:
var rangesCount = (bytes[pos++] << 8) | bytes[pos++];
for (i = 0; i < rangesCount; ++i) {
var first = (bytes[pos++] << 8) | bytes[pos++];
var fdIndex = bytes[pos++];
var next = (bytes[pos] << 8) | bytes[pos + 1];
for (var j = first; j < next; ++j) {
fdSelect.push(fdIndex);
}
}
// Advance past the sentinel(next).
pos += 2;
break;
default:
error('Unknown fdselect format ' + format);
break;
}
var end = pos;
return new CFFFDSelect(fdSelect, bytes.subarray(start, end));
}
};
return CFFParser;
})();
// Compact Font Format
var CFF = (function CFFClosure() {
function CFF() {
this.header = null;
this.names = [];
this.topDict = null;
this.strings = new CFFStrings();
this.globalSubrIndex = null;
// The following could really be per font, but since we only have one font
// store them here.
this.encoding = null;
this.charset = null;
this.charStrings = null;
this.fdArray = [];
this.fdSelect = null;
this.isCIDFont = false;
}
return CFF;
})();
var CFFHeader = (function CFFHeaderClosure() {
function CFFHeader(major, minor, hdrSize, offSize) {
this.major = major;
this.minor = minor;
this.hdrSize = hdrSize;
this.offSize = offSize;
}
return CFFHeader;
})();
var CFFStrings = (function CFFStringsClosure() {
function CFFStrings() {
this.strings = [];
}
CFFStrings.prototype = {
get: function CFFStrings_get(index) {
if (index >= 0 && index <= 390) {
return CFFStandardStrings[index];
}
if (index - 391 <= this.strings.length) {
return this.strings[index - 391];
}
return CFFStandardStrings[0];
},
add: function CFFStrings_add(value) {
this.strings.push(value);
},
get count() {
return this.strings.length;
}
};
return CFFStrings;
})();
var CFFIndex = (function CFFIndexClosure() {
function CFFIndex() {
this.objects = [];
this.length = 0;
}
CFFIndex.prototype = {
add: function CFFIndex_add(data) {
this.length += data.length;
this.objects.push(data);
},
set: function CFFIndex_set(index, data) {
this.length += data.length - this.objects[index].length;
this.objects[index] = data;
},
get: function CFFIndex_get(index) {
return this.objects[index];
},
get count() {
return this.objects.length;
}
};
return CFFIndex;
})();
var CFFDict = (function CFFDictClosure() {
function CFFDict(tables, strings) {
this.keyToNameMap = tables.keyToNameMap;
this.nameToKeyMap = tables.nameToKeyMap;
this.defaults = tables.defaults;
this.types = tables.types;
this.opcodes = tables.opcodes;
this.order = tables.order;
this.strings = strings;
this.values = Object.create(null);
}
CFFDict.prototype = {
// value should always be an array
setByKey: function CFFDict_setByKey(key, value) {
if (!(key in this.keyToNameMap)) {
return false;
}
// ignore empty values
if (value.length === 0) {
return true;
}
var type = this.types[key];
// remove the array wrapping these types of values
if (type === 'num' || type === 'sid' || type === 'offset') {
value = value[0];
}
this.values[key] = value;
return true;
},
setByName: function CFFDict_setByName(name, value) {
if (!(name in this.nameToKeyMap)) {
error('Invalid dictionary name "' + name + '"');
}
this.values[this.nameToKeyMap[name]] = value;
},
hasName: function CFFDict_hasName(name) {
return this.nameToKeyMap[name] in this.values;
},
getByName: function CFFDict_getByName(name) {
if (!(name in this.nameToKeyMap)) {
error('Invalid dictionary name "' + name + '"');
}
var key = this.nameToKeyMap[name];
if (!(key in this.values)) {
return this.defaults[key];
}
return this.values[key];
},
removeByName: function CFFDict_removeByName(name) {
delete this.values[this.nameToKeyMap[name]];
}
};
CFFDict.createTables = function CFFDict_createTables(layout) {
var tables = {
keyToNameMap: {},
nameToKeyMap: {},
defaults: {},
types: {},
opcodes: {},
order: []
};
for (var i = 0, ii = layout.length; i < ii; ++i) {
var entry = layout[i];
var key = isArray(entry[0]) ? (entry[0][0] << 8) + entry[0][1] : entry[0];
tables.keyToNameMap[key] = entry[1];
tables.nameToKeyMap[entry[1]] = key;
tables.types[key] = entry[2];
tables.defaults[key] = entry[3];
tables.opcodes[key] = isArray(entry[0]) ? entry[0] : [entry[0]];
tables.order.push(key);
}
return tables;
};
return CFFDict;
})();
var CFFTopDict = (function CFFTopDictClosure() {
var layout = [
[[12, 30], 'ROS', ['sid', 'sid', 'num'], null],
[[12, 20], 'SyntheticBase', 'num', null],
[0, 'version', 'sid', null],
[1, 'Notice', 'sid', null],
[[12, 0], 'Copyright', 'sid', null],
[2, 'FullName', 'sid', null],
[3, 'FamilyName', 'sid', null],
[4, 'Weight', 'sid', null],
[[12, 1], 'isFixedPitch', 'num', 0],
[[12, 2], 'ItalicAngle', 'num', 0],
[[12, 3], 'UnderlinePosition', 'num', -100],
[[12, 4], 'UnderlineThickness', 'num', 50],
[[12, 5], 'PaintType', 'num', 0],
[[12, 6], 'CharstringType', 'num', 2],
[[12, 7], 'FontMatrix', ['num', 'num', 'num', 'num', 'num', 'num'],
[0.001, 0, 0, 0.001, 0, 0]],
[13, 'UniqueID', 'num', null],
[5, 'FontBBox', ['num', 'num', 'num', 'num'], [0, 0, 0, 0]],
[[12, 8], 'StrokeWidth', 'num', 0],
[14, 'XUID', 'array', null],
[15, 'charset', 'offset', 0],
[16, 'Encoding', 'offset', 0],
[17, 'CharStrings', 'offset', 0],
[18, 'Private', ['offset', 'offset'], null],
[[12, 21], 'PostScript', 'sid', null],
[[12, 22], 'BaseFontName', 'sid', null],
[[12, 23], 'BaseFontBlend', 'delta', null],
[[12, 31], 'CIDFontVersion', 'num', 0],
[[12, 32], 'CIDFontRevision', 'num', 0],
[[12, 33], 'CIDFontType', 'num', 0],
[[12, 34], 'CIDCount', 'num', 8720],
[[12, 35], 'UIDBase', 'num', null],
// XXX: CID Fonts on DirectWrite 6.1 only seem to work if FDSelect comes
// before FDArray.
[[12, 37], 'FDSelect', 'offset', null],
[[12, 36], 'FDArray', 'offset', null],
[[12, 38], 'FontName', 'sid', null]
];
var tables = null;
function CFFTopDict(strings) {
if (tables === null) {
tables = CFFDict.createTables(layout);
}
CFFDict.call(this, tables, strings);
this.privateDict = null;
}
CFFTopDict.prototype = Object.create(CFFDict.prototype);
return CFFTopDict;
})();
var CFFPrivateDict = (function CFFPrivateDictClosure() {
var layout = [
[6, 'BlueValues', 'delta', null],
[7, 'OtherBlues', 'delta', null],
[8, 'FamilyBlues', 'delta', null],
[9, 'FamilyOtherBlues', 'delta', null],
[[12, 9], 'BlueScale', 'num', 0.039625],
[[12, 10], 'BlueShift', 'num', 7],
[[12, 11], 'BlueFuzz', 'num', 1],
[10, 'StdHW', 'num', null],
[11, 'StdVW', 'num', null],
[[12, 12], 'StemSnapH', 'delta', null],
[[12, 13], 'StemSnapV', 'delta', null],
[[12, 14], 'ForceBold', 'num', 0],
[[12, 17], 'LanguageGroup', 'num', 0],
[[12, 18], 'ExpansionFactor', 'num', 0.06],
[[12, 19], 'initialRandomSeed', 'num', 0],
[20, 'defaultWidthX', 'num', 0],
[21, 'nominalWidthX', 'num', 0],
[19, 'Subrs', 'offset', null]
];
var tables = null;
function CFFPrivateDict(strings) {
if (tables === null) {
tables = CFFDict.createTables(layout);
}
CFFDict.call(this, tables, strings);
this.subrsIndex = null;
}
CFFPrivateDict.prototype = Object.create(CFFDict.prototype);
return CFFPrivateDict;
})();
var CFFCharsetPredefinedTypes = {
ISO_ADOBE: 0,
EXPERT: 1,
EXPERT_SUBSET: 2
};
var CFFCharset = (function CFFCharsetClosure() {
function CFFCharset(predefined, format, charset, raw) {
this.predefined = predefined;
this.format = format;
this.charset = charset;
this.raw = raw;
}
return CFFCharset;
})();
var CFFEncoding = (function CFFEncodingClosure() {
function CFFEncoding(predefined, format, encoding, raw) {
this.predefined = predefined;
this.format = format;
this.encoding = encoding;
this.raw = raw;
}
return CFFEncoding;
})();
var CFFFDSelect = (function CFFFDSelectClosure() {
function CFFFDSelect(fdSelect, raw) {
this.fdSelect = fdSelect;
this.raw = raw;
}
CFFFDSelect.prototype = {
getFDIndex: function CFFFDSelect_get(glyphIndex) {
if (glyphIndex < 0 || glyphIndex >= this.fdSelect.length) {
return -1;
}
return this.fdSelect[glyphIndex];
}
};
return CFFFDSelect;
})();
// Helper class to keep track of where an offset is within the data and helps
// filling in that offset once it's known.
var CFFOffsetTracker = (function CFFOffsetTrackerClosure() {
function CFFOffsetTracker() {
this.offsets = Object.create(null);
}
CFFOffsetTracker.prototype = {
isTracking: function CFFOffsetTracker_isTracking(key) {
return key in this.offsets;
},
track: function CFFOffsetTracker_track(key, location) {
if (key in this.offsets) {
error('Already tracking location of ' + key);
}
this.offsets[key] = location;
},
offset: function CFFOffsetTracker_offset(value) {
for (var key in this.offsets) {
this.offsets[key] += value;
}
},
setEntryLocation: function CFFOffsetTracker_setEntryLocation(key,
values,
output) {
if (!(key in this.offsets)) {
error('Not tracking location of ' + key);
}
var data = output.data;
var dataOffset = this.offsets[key];
var size = 5;
for (var i = 0, ii = values.length; i < ii; ++i) {
var offset0 = i * size + dataOffset;
var offset1 = offset0 + 1;
var offset2 = offset0 + 2;
var offset3 = offset0 + 3;
var offset4 = offset0 + 4;
// It's easy to screw up offsets so perform this sanity check.
if (data[offset0] !== 0x1d || data[offset1] !== 0 ||
data[offset2] !== 0 || data[offset3] !== 0 || data[offset4] !== 0) {
error('writing to an offset that is not empty');
}
var value = values[i];
data[offset0] = 0x1d;
data[offset1] = (value >> 24) & 0xFF;
data[offset2] = (value >> 16) & 0xFF;
data[offset3] = (value >> 8) & 0xFF;
data[offset4] = value & 0xFF;
}
}
};
return CFFOffsetTracker;
})();
// Takes a CFF and converts it to the binary representation.
var CFFCompiler = (function CFFCompilerClosure() {
function CFFCompiler(cff) {
this.cff = cff;
}
CFFCompiler.prototype = {
compile: function CFFCompiler_compile() {
var cff = this.cff;
var output = {
data: [],
length: 0,
add: function CFFCompiler_add(data) {
this.data = this.data.concat(data);
this.length = this.data.length;
}
};
// Compile the five entries that must be in order.
var header = this.compileHeader(cff.header);
output.add(header);
var nameIndex = this.compileNameIndex(cff.names);
output.add(nameIndex);
if (cff.isCIDFont) {
// The spec is unclear on how font matrices should relate to each other
// when there is one in the main top dict and the sub top dicts.
// Windows handles this differently than linux and osx so we have to
// normalize to work on all.
// Rules based off of some mailing list discussions:
// - If main font has a matrix and subfont doesn't, use the main matrix.
// - If no main font matrix and there is a subfont matrix, use the
// subfont matrix.
// - If both have matrices, concat together.
// - If neither have matrices, use default.
// To make this work on all platforms we move the top matrix into each
// sub top dict and concat if necessary.
if (cff.topDict.hasName('FontMatrix')) {
var base = cff.topDict.getByName('FontMatrix');
cff.topDict.removeByName('FontMatrix');
for (var i = 0, ii = cff.fdArray.length; i < ii; i++) {
var subDict = cff.fdArray[i];
var matrix = base.slice(0);
if (subDict.hasName('FontMatrix')) {
matrix = Util.transform(matrix, subDict.getByName('FontMatrix'));
}
subDict.setByName('FontMatrix', matrix);
}
}
}
var compiled = this.compileTopDicts([cff.topDict],
output.length,
cff.isCIDFont);
output.add(compiled.output);
var topDictTracker = compiled.trackers[0];
var stringIndex = this.compileStringIndex(cff.strings.strings);
output.add(stringIndex);
var globalSubrIndex = this.compileIndex(cff.globalSubrIndex);
output.add(globalSubrIndex);
// Now start on the other entries that have no specfic order.
if (cff.encoding && cff.topDict.hasName('Encoding')) {
if (cff.encoding.predefined) {
topDictTracker.setEntryLocation('Encoding', [cff.encoding.format],
output);
} else {
var encoding = this.compileEncoding(cff.encoding);
topDictTracker.setEntryLocation('Encoding', [output.length], output);
output.add(encoding);
}
}
if (cff.charset && cff.topDict.hasName('charset')) {
if (cff.charset.predefined) {
topDictTracker.setEntryLocation('charset', [cff.charset.format],
output);
} else {
var charset = this.compileCharset(cff.charset);
topDictTracker.setEntryLocation('charset', [output.length], output);
output.add(charset);
}
}
var charStrings = this.compileCharStrings(cff.charStrings);
topDictTracker.setEntryLocation('CharStrings', [output.length], output);
output.add(charStrings);
if (cff.isCIDFont) {
// For some reason FDSelect must be in front of FDArray on windows. OSX
// and linux don't seem to care.
topDictTracker.setEntryLocation('FDSelect', [output.length], output);
var fdSelect = this.compileFDSelect(cff.fdSelect.raw);
output.add(fdSelect);
// It is unclear if the sub font dictionary can have CID related
// dictionary keys, but the sanitizer doesn't like them so remove them.
compiled = this.compileTopDicts(cff.fdArray, output.length, true);
topDictTracker.setEntryLocation('FDArray', [output.length], output);
output.add(compiled.output);
var fontDictTrackers = compiled.trackers;
this.compilePrivateDicts(cff.fdArray, fontDictTrackers, output);
}
this.compilePrivateDicts([cff.topDict], [topDictTracker], output);
// If the font data ends with INDEX whose object data is zero-length,
// the sanitizer will bail out. Add a dummy byte to avoid that.
output.add([0]);
return output.data;
},
encodeNumber: function CFFCompiler_encodeNumber(value) {
if (parseFloat(value) === parseInt(value, 10) && !isNaN(value)) { // isInt
return this.encodeInteger(value);
} else {
return this.encodeFloat(value);
}
},
encodeFloat: function CFFCompiler_encodeFloat(num) {
var value = num.toString();
// rounding inaccurate doubles
var m = /\.(\d*?)(?:9{5,20}|0{5,20})\d{0,2}(?:e(.+)|$)/.exec(value);
if (m) {
var epsilon = parseFloat('1e' + ((m[2] ? +m[2] : 0) + m[1].length));
value = (Math.round(num * epsilon) / epsilon).toString();
}
var nibbles = '';
var i, ii;
for (i = 0, ii = value.length; i < ii; ++i) {
var a = value[i];
if (a === 'e') {
nibbles += value[++i] === '-' ? 'c' : 'b';
} else if (a === '.') {
nibbles += 'a';
} else if (a === '-') {
nibbles += 'e';
} else {
nibbles += a;
}
}
nibbles += (nibbles.length & 1) ? 'f' : 'ff';
var out = [30];
for (i = 0, ii = nibbles.length; i < ii; i += 2) {
out.push(parseInt(nibbles.substr(i, 2), 16));
}
return out;
},
encodeInteger: function CFFCompiler_encodeInteger(value) {
var code;
if (value >= -107 && value <= 107) {
code = [value + 139];
} else if (value >= 108 && value <= 1131) {
value = [value - 108];
code = [(value >> 8) + 247, value & 0xFF];
} else if (value >= -1131 && value <= -108) {
value = -value - 108;
code = [(value >> 8) + 251, value & 0xFF];
} else if (value >= -32768 && value <= 32767) {
code = [0x1c, (value >> 8) & 0xFF, value & 0xFF];
} else {
code = [0x1d,
(value >> 24) & 0xFF,
(value >> 16) & 0xFF,
(value >> 8) & 0xFF,
value & 0xFF];
}
return code;
},
compileHeader: function CFFCompiler_compileHeader(header) {
return [
header.major,
header.minor,
header.hdrSize,
header.offSize
];
},
compileNameIndex: function CFFCompiler_compileNameIndex(names) {
var nameIndex = new CFFIndex();
for (var i = 0, ii = names.length; i < ii; ++i) {
nameIndex.add(stringToBytes(names[i]));
}
return this.compileIndex(nameIndex);
},
compileTopDicts: function CFFCompiler_compileTopDicts(dicts,
length,
removeCidKeys) {
var fontDictTrackers = [];
var fdArrayIndex = new CFFIndex();
for (var i = 0, ii = dicts.length; i < ii; ++i) {
var fontDict = dicts[i];
if (removeCidKeys) {
fontDict.removeByName('CIDFontVersion');
fontDict.removeByName('CIDFontRevision');
fontDict.removeByName('CIDFontType');
fontDict.removeByName('CIDCount');
fontDict.removeByName('UIDBase');
}
var fontDictTracker = new CFFOffsetTracker();
var fontDictData = this.compileDict(fontDict, fontDictTracker);
fontDictTrackers.push(fontDictTracker);
fdArrayIndex.add(fontDictData);
fontDictTracker.offset(length);
}
fdArrayIndex = this.compileIndex(fdArrayIndex, fontDictTrackers);
return {
trackers: fontDictTrackers,
output: fdArrayIndex
};
},
compilePrivateDicts: function CFFCompiler_compilePrivateDicts(dicts,
trackers,
output) {
for (var i = 0, ii = dicts.length; i < ii; ++i) {
var fontDict = dicts[i];
assert(fontDict.privateDict && fontDict.hasName('Private'),
'There must be an private dictionary.');
var privateDict = fontDict.privateDict;
var privateDictTracker = new CFFOffsetTracker();
var privateDictData = this.compileDict(privateDict, privateDictTracker);
var outputLength = output.length;
privateDictTracker.offset(outputLength);
if (!privateDictData.length) {
// The private dictionary was empty, set the output length to zero to
// ensure the offset length isn't out of bounds in the eyes of the
// sanitizer.
outputLength = 0;
}
trackers[i].setEntryLocation('Private',
[privateDictData.length, outputLength],
output);
output.add(privateDictData);
if (privateDict.subrsIndex && privateDict.hasName('Subrs')) {
var subrs = this.compileIndex(privateDict.subrsIndex);
privateDictTracker.setEntryLocation('Subrs', [privateDictData.length],
output);
output.add(subrs);
}
}
},
compileDict: function CFFCompiler_compileDict(dict, offsetTracker) {
var out = [];
// The dictionary keys must be in a certain order.
var order = dict.order;
for (var i = 0; i < order.length; ++i) {
var key = order[i];
if (!(key in dict.values)) {
continue;
}
var values = dict.values[key];
var types = dict.types[key];
if (!isArray(types)) {
types = [types];
}
if (!isArray(values)) {
values = [values];
}
// Remove any empty dict values.
if (values.length === 0) {
continue;
}
for (var j = 0, jj = types.length; j < jj; ++j) {
var type = types[j];
var value = values[j];
switch (type) {
case 'num':
case 'sid':
out = out.concat(this.encodeNumber(value));
break;
case 'offset':
// For offsets we just insert a 32bit integer so we don't have to
// deal with figuring out the length of the offset when it gets
// replaced later on by the compiler.
var name = dict.keyToNameMap[key];
// Some offsets have the offset and the length, so just record the
// position of the first one.
if (!offsetTracker.isTracking(name)) {
offsetTracker.track(name, out.length);
}
out = out.concat([0x1d, 0, 0, 0, 0]);
break;
case 'array':
case 'delta':
out = out.concat(this.encodeNumber(value));
for (var k = 1, kk = values.length; k < kk; ++k) {
out = out.concat(this.encodeNumber(values[k]));
}
break;
default:
error('Unknown data type of ' + type);
break;
}
}
out = out.concat(dict.opcodes[key]);
}
return out;
},
compileStringIndex: function CFFCompiler_compileStringIndex(strings) {
var stringIndex = new CFFIndex();
for (var i = 0, ii = strings.length; i < ii; ++i) {
stringIndex.add(stringToBytes(strings[i]));
}
return this.compileIndex(stringIndex);
},
compileGlobalSubrIndex: function CFFCompiler_compileGlobalSubrIndex() {
var globalSubrIndex = this.cff.globalSubrIndex;
this.out.writeByteArray(this.compileIndex(globalSubrIndex));
},
compileCharStrings: function CFFCompiler_compileCharStrings(charStrings) {
return this.compileIndex(charStrings);
},
compileCharset: function CFFCompiler_compileCharset(charset) {
return this.compileTypedArray(charset.raw);
},
compileEncoding: function CFFCompiler_compileEncoding(encoding) {
return this.compileTypedArray(encoding.raw);
},
compileFDSelect: function CFFCompiler_compileFDSelect(fdSelect) {
return this.compileTypedArray(fdSelect);
},
compileTypedArray: function CFFCompiler_compileTypedArray(data) {
var out = [];
for (var i = 0, ii = data.length; i < ii; ++i) {
out[i] = data[i];
}
return out;
},
compileIndex: function CFFCompiler_compileIndex(index, trackers) {
trackers = trackers || [];
var objects = index.objects;
// First 2 bytes contains the number of objects contained into this index
var count = objects.length;
// If there is no object, just create an index. This technically
// should just be [0, 0] but OTS has an issue with that.
if (count === 0) {
return [0, 0, 0];
}
var data = [(count >> 8) & 0xFF, count & 0xff];
var lastOffset = 1, i;
for (i = 0; i < count; ++i) {
lastOffset += objects[i].length;
}
var offsetSize;
if (lastOffset < 0x100) {
offsetSize = 1;
} else if (lastOffset < 0x10000) {
offsetSize = 2;
} else if (lastOffset < 0x1000000) {
offsetSize = 3;
} else {
offsetSize = 4;
}
// Next byte contains the offset size use to reference object in the file
data.push(offsetSize);
// Add another offset after this one because we need a new offset
var relativeOffset = 1;
for (i = 0; i < count + 1; i++) {
if (offsetSize === 1) {
data.push(relativeOffset & 0xFF);
} else if (offsetSize === 2) {
data.push((relativeOffset >> 8) & 0xFF,
relativeOffset & 0xFF);
} else if (offsetSize === 3) {
data.push((relativeOffset >> 16) & 0xFF,
(relativeOffset >> 8) & 0xFF,
relativeOffset & 0xFF);
} else {
data.push((relativeOffset >>> 24) & 0xFF,
(relativeOffset >> 16) & 0xFF,
(relativeOffset >> 8) & 0xFF,
relativeOffset & 0xFF);
}
if (objects[i]) {
relativeOffset += objects[i].length;
}
}
for (i = 0; i < count; i++) {
// Notify the tracker where the object will be offset in the data.
if (trackers[i]) {
trackers[i].offset(data.length);
}
for (var j = 0, jj = objects[i].length; j < jj; j++) {
data.push(objects[i][j]);
}
}
return data;
}
};
return CFFCompiler;
})();
exports.CFFStandardStrings = CFFStandardStrings;
exports.CFFParser = CFFParser;
exports.CFF = CFF;
exports.CFFHeader = CFFHeader;
exports.CFFStrings = CFFStrings;
exports.CFFIndex = CFFIndex;
exports.CFFCharset = CFFCharset;
exports.CFFTopDict = CFFTopDict;
exports.CFFPrivateDict = CFFPrivateDict;
exports.CFFCompiler = CFFCompiler;
}));
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