1647 lines
58 KiB
JavaScript
1647 lines
58 KiB
JavaScript
/* Copyright 2016 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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(function (root, factory) {
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if (typeof define === 'function' && define.amd) {
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define('pdfjs/core/cff_parser', ['exports', 'pdfjs/shared/util',
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'pdfjs/core/charsets', 'pdfjs/core/encodings'], factory);
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} else if (typeof exports !== 'undefined') {
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factory(exports, require('../shared/util.js'), require('./charsets.js'),
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require('./encodings.js'));
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} else {
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factory((root.pdfjsCoreCFFParser = {}), root.pdfjsSharedUtil,
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root.pdfjsCoreCharsets, root.pdfjsCoreEncodings);
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}
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}(this, function (exports, sharedUtil, coreCharsets, coreEncodings) {
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var error = sharedUtil.error;
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var info = sharedUtil.info;
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var bytesToString = sharedUtil.bytesToString;
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var warn = sharedUtil.warn;
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var isArray = sharedUtil.isArray;
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var Util = sharedUtil.Util;
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var stringToBytes = sharedUtil.stringToBytes;
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var assert = sharedUtil.assert;
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var ISOAdobeCharset = coreCharsets.ISOAdobeCharset;
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var ExpertCharset = coreCharsets.ExpertCharset;
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var ExpertSubsetCharset = coreCharsets.ExpertSubsetCharset;
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var StandardEncoding = coreEncodings.StandardEncoding;
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var ExpertEncoding = coreEncodings.ExpertEncoding;
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// Maximum subroutine call depth of type 2 chartrings. Matches OTS.
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var MAX_SUBR_NESTING = 10;
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/**
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* The CFF class takes a Type1 file and wrap it into a
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* 'Compact Font Format' which itself embed Type2 charstrings.
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*/
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var CFFStandardStrings = [
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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',
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'equal', 'greater', 'question', 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
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'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
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'X', 'Y', 'Z', 'bracketleft', 'backslash', 'bracketright', 'asciicircum',
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'underscore', 'quoteleft', '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',
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'z', 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent',
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'sterling', 'fraction', 'yen', 'florin', 'section', 'currency',
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'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft',
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'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl',
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'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', 'quotedblbase',
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'quotedblright', 'guillemotright', 'ellipsis', 'perthousand', 'questiondown',
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'grave', 'acute', 'circumflex', 'tilde', 'macron', 'breve', 'dotaccent',
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'dieresis', 'ring', 'cedilla', 'hungarumlaut', 'ogonek', 'caron', 'emdash',
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'AE', 'ordfeminine', 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae',
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'dotlessi', 'lslash', 'oslash', 'oe', 'germandbls', 'onesuperior',
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'logicalnot', 'mu', 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn',
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'onequarter', 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters',
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'twosuperior', 'registered', 'minus', 'eth', 'multiply', 'threesuperior',
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'copyright', 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring',
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'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',
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'ccedilla', 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute',
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'icircumflex', 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex',
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'odieresis', 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex',
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'udieresis', 'ugrave', 'yacute', 'ydieresis', 'zcaron', 'exclamsmall',
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'Hungarumlautsmall', 'dollaroldstyle', 'dollarsuperior', 'ampersandsmall',
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'Acutesmall', 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader',
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'onedotenleader', 'zerooldstyle', 'oneoldstyle', 'twooldstyle',
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'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle',
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'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', 'commasuperior',
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'threequartersemdash', 'periodsuperior', 'questionsmall', 'asuperior',
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'bsuperior', 'centsuperior', 'dsuperior', 'esuperior', 'isuperior',
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'lsuperior', 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior',
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'tsuperior', 'ff', 'ffi', 'ffl', 'parenleftinferior', 'parenrightinferior',
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'Circumflexsmall', 'hyphensuperior', 'Gravesmall', 'Asmall', 'Bsmall',
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'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', 'Hsmall', 'Ismall',
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'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', 'Osmall', 'Psmall',
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'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', 'Vsmall', 'Wsmall',
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'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', 'onefitted', 'rupiah',
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'Tildesmall', 'exclamdownsmall', 'centoldstyle', 'Lslashsmall',
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'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', 'Brevesmall', 'Caronsmall',
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'Dotaccentsmall', 'Macronsmall', 'figuredash', 'hypheninferior',
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'Ogoneksmall', 'Ringsmall', 'Cedillasmall', 'questiondownsmall', 'oneeighth',
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'threeeighths', 'fiveeighths', 'seveneighths', 'onethird', 'twothirds',
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'zerosuperior', 'foursuperior', 'fivesuperior', 'sixsuperior',
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'sevensuperior', 'eightsuperior', 'ninesuperior', 'zeroinferior',
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'oneinferior', 'twoinferior', 'threeinferior', 'fourinferior',
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'fiveinferior', 'sixinferior', 'seveninferior', 'eightinferior',
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'nineinferior', 'centinferior', 'dollarinferior', 'periodinferior',
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'commainferior', 'Agravesmall', 'Aacutesmall', 'Acircumflexsmall',
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'Atildesmall', 'Adieresissmall', 'Aringsmall', 'AEsmall', 'Ccedillasmall',
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'Egravesmall', 'Eacutesmall', 'Ecircumflexsmall', 'Edieresissmall',
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'Igravesmall', 'Iacutesmall', 'Icircumflexsmall', 'Idieresissmall',
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'Ethsmall', 'Ntildesmall', 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall',
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'Otildesmall', 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall',
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'Uacutesmall', 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall',
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'Thornsmall', 'Ydieresissmall', '001.000', '001.001', '001.002', '001.003',
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'Black', 'Bold', 'Book', 'Light', 'Medium', 'Regular', 'Roman', 'Semibold'
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];
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var CFFParser = (function CFFParserClosure() {
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var CharstringValidationData = [
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null,
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{ id: 'hstem', min: 2, stackClearing: true, stem: true },
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null,
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{ id: 'vstem', min: 2, stackClearing: true, stem: true },
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{ id: 'vmoveto', min: 1, stackClearing: true },
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{ id: 'rlineto', min: 2, resetStack: true },
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{ id: 'hlineto', min: 1, resetStack: true },
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{ id: 'vlineto', min: 1, resetStack: true },
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{ id: 'rrcurveto', min: 6, resetStack: true },
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null,
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{ id: 'callsubr', min: 1, undefStack: true },
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{ id: 'return', min: 0, undefStack: true },
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null, // 12
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null,
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{ id: 'endchar', min: 0, stackClearing: true },
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null,
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null,
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null,
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{ id: 'hstemhm', min: 2, stackClearing: true, stem: true },
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{ id: 'hintmask', min: 0, stackClearing: true },
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{ id: 'cntrmask', min: 0, stackClearing: true },
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{ id: 'rmoveto', min: 2, stackClearing: true },
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{ id: 'hmoveto', min: 1, stackClearing: true },
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{ id: 'vstemhm', min: 2, stackClearing: true, stem: true },
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{ id: 'rcurveline', min: 8, resetStack: true },
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{ id: 'rlinecurve', min: 8, resetStack: true },
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{ id: 'vvcurveto', min: 4, resetStack: true },
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{ id: 'hhcurveto', min: 4, resetStack: true },
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null, // shortint
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{ id: 'callgsubr', min: 1, undefStack: true },
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{ id: 'vhcurveto', min: 4, resetStack: true },
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{ id: 'hvcurveto', min: 4, resetStack: true }
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];
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var CharstringValidationData12 = [
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null,
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null,
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null,
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{ id: 'and', min: 2, stackDelta: -1 },
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{ id: 'or', min: 2, stackDelta: -1 },
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{ id: 'not', min: 1, stackDelta: 0 },
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null,
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null,
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null,
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{ id: 'abs', min: 1, stackDelta: 0 },
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{ id: 'add', min: 2, stackDelta: -1,
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stackFn: function stack_div(stack, index) {
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stack[index - 2] = stack[index - 2] + stack[index - 1];
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}
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},
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{ id: 'sub', min: 2, stackDelta: -1,
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stackFn: function stack_div(stack, index) {
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stack[index - 2] = stack[index - 2] - stack[index - 1];
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}
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},
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{ id: 'div', min: 2, stackDelta: -1,
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stackFn: function stack_div(stack, index) {
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stack[index - 2] = stack[index - 2] / stack[index - 1];
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}
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},
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null,
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{ id: 'neg', min: 1, stackDelta: 0,
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stackFn: function stack_div(stack, index) {
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stack[index - 1] = -stack[index - 1];
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}
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},
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{ id: 'eq', min: 2, stackDelta: -1 },
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null,
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null,
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{ id: 'drop', min: 1, stackDelta: -1 },
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null,
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{ id: 'put', min: 2, stackDelta: -2 },
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{ id: 'get', min: 1, stackDelta: 0 },
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{ id: 'ifelse', min: 4, stackDelta: -3 },
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{ id: 'random', min: 0, stackDelta: 1 },
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{ id: 'mul', min: 2, stackDelta: -1,
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stackFn: function stack_div(stack, index) {
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stack[index - 2] = stack[index - 2] * stack[index - 1];
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}
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},
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null,
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{ id: 'sqrt', min: 1, stackDelta: 0 },
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{ id: 'dup', min: 1, stackDelta: 1 },
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{ id: 'exch', min: 2, stackDelta: 0 },
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{ id: 'index', min: 2, stackDelta: 0 },
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{ id: 'roll', min: 3, stackDelta: -2 },
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null,
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null,
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null,
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{ id: 'hflex', min: 7, resetStack: true },
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{ id: 'flex', min: 13, resetStack: true },
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{ id: 'hflex1', min: 9, resetStack: true },
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{ id: 'flex1', min: 11, resetStack: true }
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];
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function CFFParser(file, properties, seacAnalysisEnabled) {
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this.bytes = file.getBytes();
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this.properties = properties;
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this.seacAnalysisEnabled = !!seacAnalysisEnabled;
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}
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CFFParser.prototype = {
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parse: function CFFParser_parse() {
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var properties = this.properties;
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var cff = new CFF();
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this.cff = cff;
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// The first five sections must be in order, all the others are reached
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// via offsets contained in one of the below.
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var header = this.parseHeader();
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var nameIndex = this.parseIndex(header.endPos);
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var topDictIndex = this.parseIndex(nameIndex.endPos);
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var stringIndex = this.parseIndex(topDictIndex.endPos);
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var globalSubrIndex = this.parseIndex(stringIndex.endPos);
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var topDictParsed = this.parseDict(topDictIndex.obj.get(0));
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var topDict = this.createDict(CFFTopDict, topDictParsed, cff.strings);
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cff.header = header.obj;
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cff.names = this.parseNameIndex(nameIndex.obj);
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cff.strings = this.parseStringIndex(stringIndex.obj);
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cff.topDict = topDict;
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cff.globalSubrIndex = globalSubrIndex.obj;
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this.parsePrivateDict(cff.topDict);
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cff.isCIDFont = topDict.hasName('ROS');
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var charStringOffset = topDict.getByName('CharStrings');
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var charStringIndex = this.parseIndex(charStringOffset).obj;
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var fontMatrix = topDict.getByName('FontMatrix');
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if (fontMatrix) {
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properties.fontMatrix = fontMatrix;
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}
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var fontBBox = topDict.getByName('FontBBox');
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if (fontBBox) {
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// adjusting ascent/descent
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properties.ascent = fontBBox[3];
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properties.descent = fontBBox[1];
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properties.ascentScaled = true;
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}
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var charset, encoding;
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if (cff.isCIDFont) {
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var fdArrayIndex = this.parseIndex(topDict.getByName('FDArray')).obj;
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for (var i = 0, ii = fdArrayIndex.count; i < ii; ++i) {
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var dictRaw = fdArrayIndex.get(i);
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var fontDict = this.createDict(CFFTopDict, this.parseDict(dictRaw),
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cff.strings);
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this.parsePrivateDict(fontDict);
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cff.fdArray.push(fontDict);
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}
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// cid fonts don't have an encoding
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encoding = null;
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charset = this.parseCharsets(topDict.getByName('charset'),
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charStringIndex.count, cff.strings, true);
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cff.fdSelect = this.parseFDSelect(topDict.getByName('FDSelect'),
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charStringIndex.count);
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} else {
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charset = this.parseCharsets(topDict.getByName('charset'),
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charStringIndex.count, cff.strings, false);
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encoding = this.parseEncoding(topDict.getByName('Encoding'),
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properties,
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cff.strings, charset.charset);
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}
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cff.charset = charset;
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cff.encoding = encoding;
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var charStringsAndSeacs = this.parseCharStrings(
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charStringIndex,
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topDict.privateDict.subrsIndex,
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globalSubrIndex.obj,
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cff.fdSelect,
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cff.fdArray);
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cff.charStrings = charStringsAndSeacs.charStrings;
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cff.seacs = charStringsAndSeacs.seacs;
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cff.widths = charStringsAndSeacs.widths;
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return cff;
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},
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parseHeader: function CFFParser_parseHeader() {
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var bytes = this.bytes;
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var bytesLength = bytes.length;
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var offset = 0;
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// Prevent an infinite loop, by checking that the offset is within the
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// bounds of the bytes array. Necessary in empty, or invalid, font files.
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while (offset < bytesLength && bytes[offset] !== 1) {
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++offset;
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}
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if (offset >= bytesLength) {
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error('Invalid CFF header');
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} else if (offset !== 0) {
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info('cff data is shifted');
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bytes = bytes.subarray(offset);
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this.bytes = bytes;
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}
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var major = bytes[0];
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var minor = bytes[1];
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var hdrSize = bytes[2];
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var offSize = bytes[3];
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var header = new CFFHeader(major, minor, hdrSize, offSize);
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return { obj: header, endPos: hdrSize };
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},
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parseDict: function CFFParser_parseDict(dict) {
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var pos = 0;
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function parseOperand() {
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var value = dict[pos++];
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if (value === 30) {
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return parseFloatOperand(pos);
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} else if (value === 28) {
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value = dict[pos++];
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value = ((value << 24) | (dict[pos++] << 16)) >> 16;
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return value;
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} else if (value === 29) {
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value = dict[pos++];
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value = (value << 8) | dict[pos++];
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value = (value << 8) | dict[pos++];
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value = (value << 8) | dict[pos++];
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return value;
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} else if (value >= 32 && value <= 246) {
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return value - 139;
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} else if (value >= 247 && value <= 250) {
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return ((value - 247) * 256) + dict[pos++] + 108;
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} else if (value >= 251 && value <= 254) {
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return -((value - 251) * 256) - dict[pos++] - 108;
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} else {
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error('255 is not a valid DICT command');
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}
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return -1;
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}
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function parseFloatOperand() {
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var str = '';
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var eof = 15;
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var lookup = ['0', '1', '2', '3', '4', '5', '6', '7', '8',
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'9', '.', 'E', 'E-', null, '-'];
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var length = dict.length;
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while (pos < length) {
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var b = dict[pos++];
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var b1 = b >> 4;
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var b2 = b & 15;
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if (b1 === eof) {
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break;
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}
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str += lookup[b1];
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if (b2 === eof) {
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break;
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}
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str += lookup[b2];
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}
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return parseFloat(str);
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}
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var operands = [];
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var entries = [];
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pos = 0;
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var end = dict.length;
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while (pos < end) {
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var b = dict[pos];
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if (b <= 21) {
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if (b === 12) {
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b = (b << 8) | dict[++pos];
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}
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entries.push([b, operands]);
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operands = [];
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++pos;
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} else {
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operands.push(parseOperand());
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}
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}
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return entries;
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},
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parseIndex: function CFFParser_parseIndex(pos) {
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var cffIndex = new CFFIndex();
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var bytes = this.bytes;
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var count = (bytes[pos++] << 8) | bytes[pos++];
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var offsets = [];
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var end = pos;
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var i, ii;
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if (count !== 0) {
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var offsetSize = bytes[pos++];
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// 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;
|
|
}));
|