ce072022c1
This patch basically reverts one aspect of TrueType (3, 1) cmap parsing to the state prior to PR 4259. After that PR, a number of regressions occurred in this particular code-path, which necessitated a number of follow-ups such as PRs 5703, 5743, and 6425. The empirical data suggests, at least to me, that we should always prefer a (3, 1) cmap for TrueType fonts when they have an encoding, regardless of the Symbolic font flag. Obviously this patch passes all unit/font/reference tests locally, and I made sure that all the PRs mentioned above landed with test-cases included. However, in my opinion, there's still a very real possibility that this patch could potentially cause new regressions. Given that the PDF file in bug 1337429 has been broken for almost *three* years before anyone noticed, and considering that the code-path in question has been the source of numerous regressions, I do *not* intend to request uplift of this patch to previous Firefox versions (assuming that it's even accepted). Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1337429.
3446 lines
120 KiB
JavaScript
3446 lines
120 KiB
JavaScript
/* Copyright 2012 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/fonts', ['exports', 'pdfjs/shared/util',
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'pdfjs/core/primitives', 'pdfjs/core/stream', 'pdfjs/core/glyphlist',
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'pdfjs/core/font_renderer', 'pdfjs/core/encodings',
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'pdfjs/core/standard_fonts', 'pdfjs/core/unicode',
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'pdfjs/core/type1_parser', 'pdfjs/core/cff_parser'], factory);
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} else if (typeof exports !== 'undefined') {
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factory(exports, require('../shared/util.js'), require('./primitives.js'),
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require('./stream.js'), require('./glyphlist.js'),
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require('./font_renderer.js'), require('./encodings.js'),
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require('./standard_fonts.js'), require('./unicode.js'),
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require('./type1_parser.js'), require('./cff_parser.js'));
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} else {
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factory((root.pdfjsCoreFonts = {}), root.pdfjsSharedUtil,
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root.pdfjsCorePrimitives, root.pdfjsCoreStream, root.pdfjsCoreGlyphList,
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root.pdfjsCoreFontRenderer, root.pdfjsCoreEncodings,
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root.pdfjsCoreStandardFonts, root.pdfjsCoreUnicode,
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root.pdfjsCoreType1Parser, root.pdfjsCoreCFFParser);
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}
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}(this, function (exports, sharedUtil, corePrimitives, coreStream,
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coreGlyphList, coreFontRenderer, coreEncodings,
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coreStandardFonts, coreUnicode, coreType1Parser,
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coreCFFParser) {
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var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX;
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var FontType = sharedUtil.FontType;
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var assert = sharedUtil.assert;
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var bytesToString = sharedUtil.bytesToString;
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var error = sharedUtil.error;
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var info = sharedUtil.info;
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var isArray = sharedUtil.isArray;
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var isInt = sharedUtil.isInt;
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var isNum = sharedUtil.isNum;
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var readUint32 = sharedUtil.readUint32;
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var shadow = sharedUtil.shadow;
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var string32 = sharedUtil.string32;
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var warn = sharedUtil.warn;
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var MissingDataException = sharedUtil.MissingDataException;
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var isSpace = sharedUtil.isSpace;
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var Stream = coreStream.Stream;
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var getGlyphsUnicode = coreGlyphList.getGlyphsUnicode;
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var getDingbatsGlyphsUnicode = coreGlyphList.getDingbatsGlyphsUnicode;
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var FontRendererFactory = coreFontRenderer.FontRendererFactory;
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var StandardEncoding = coreEncodings.StandardEncoding;
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var MacRomanEncoding = coreEncodings.MacRomanEncoding;
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var SymbolSetEncoding = coreEncodings.SymbolSetEncoding;
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var ZapfDingbatsEncoding = coreEncodings.ZapfDingbatsEncoding;
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var getEncoding = coreEncodings.getEncoding;
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var getStdFontMap = coreStandardFonts.getStdFontMap;
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var getNonStdFontMap = coreStandardFonts.getNonStdFontMap;
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var getGlyphMapForStandardFonts = coreStandardFonts.getGlyphMapForStandardFonts;
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var getSupplementalGlyphMapForArialBlack =
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coreStandardFonts.getSupplementalGlyphMapForArialBlack;
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var getUnicodeRangeFor = coreUnicode.getUnicodeRangeFor;
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var mapSpecialUnicodeValues = coreUnicode.mapSpecialUnicodeValues;
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var getUnicodeForGlyph = coreUnicode.getUnicodeForGlyph;
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var Type1Parser = coreType1Parser.Type1Parser;
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var CFFStandardStrings = coreCFFParser.CFFStandardStrings;
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var CFFParser = coreCFFParser.CFFParser;
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var CFFCompiler = coreCFFParser.CFFCompiler;
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var CFF = coreCFFParser.CFF;
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var CFFHeader = coreCFFParser.CFFHeader;
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var CFFTopDict = coreCFFParser.CFFTopDict;
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var CFFPrivateDict = coreCFFParser.CFFPrivateDict;
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var CFFStrings = coreCFFParser.CFFStrings;
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var CFFIndex = coreCFFParser.CFFIndex;
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var CFFCharset = coreCFFParser.CFFCharset;
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// Unicode Private Use Area
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var PRIVATE_USE_OFFSET_START = 0xE000;
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var PRIVATE_USE_OFFSET_END = 0xF8FF;
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var SKIP_PRIVATE_USE_RANGE_F000_TO_F01F = false;
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// PDF Glyph Space Units are one Thousandth of a TextSpace Unit
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// except for Type 3 fonts
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var PDF_GLYPH_SPACE_UNITS = 1000;
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// Accented charactars are not displayed properly on Windows, using this flag
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// to control analysis of seac charstrings.
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var SEAC_ANALYSIS_ENABLED = false;
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var FontFlags = {
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FixedPitch: 1,
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Serif: 2,
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Symbolic: 4,
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Script: 8,
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Nonsymbolic: 32,
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Italic: 64,
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AllCap: 65536,
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SmallCap: 131072,
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ForceBold: 262144
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};
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var MacStandardGlyphOrdering = [
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'.notdef', '.null', 'nonmarkingreturn', 'space', 'exclam', 'quotedbl',
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'numbersign', 'dollar', 'percent', 'ampersand', 'quotesingle', 'parenleft',
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'parenright', 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash',
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'zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight',
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'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', 'at',
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
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'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'bracketleft',
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'backslash', 'bracketright', 'asciicircum', 'underscore', 'grave', 'a', 'b',
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'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q',
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'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'braceleft', 'bar', 'braceright',
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'asciitilde', 'Adieresis', 'Aring', 'Ccedilla', 'Eacute', 'Ntilde',
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'Odieresis', 'Udieresis', 'aacute', 'agrave', 'acircumflex', 'adieresis',
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'atilde', 'aring', 'ccedilla', 'eacute', 'egrave', 'ecircumflex', 'edieresis',
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'iacute', 'igrave', 'icircumflex', 'idieresis', 'ntilde', 'oacute', 'ograve',
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'ocircumflex', 'odieresis', 'otilde', 'uacute', 'ugrave', 'ucircumflex',
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'udieresis', 'dagger', 'degree', 'cent', 'sterling', 'section', 'bullet',
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'paragraph', 'germandbls', 'registered', 'copyright', 'trademark', 'acute',
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'dieresis', 'notequal', 'AE', 'Oslash', 'infinity', 'plusminus', 'lessequal',
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'greaterequal', 'yen', 'mu', 'partialdiff', 'summation', 'product', 'pi',
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'integral', 'ordfeminine', 'ordmasculine', 'Omega', 'ae', 'oslash',
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'questiondown', 'exclamdown', 'logicalnot', 'radical', 'florin',
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'approxequal', 'Delta', 'guillemotleft', 'guillemotright', 'ellipsis',
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'nonbreakingspace', 'Agrave', 'Atilde', 'Otilde', 'OE', 'oe', 'endash',
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'emdash', 'quotedblleft', 'quotedblright', 'quoteleft', 'quoteright',
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'divide', 'lozenge', 'ydieresis', 'Ydieresis', 'fraction', 'currency',
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'guilsinglleft', 'guilsinglright', 'fi', 'fl', 'daggerdbl', 'periodcentered',
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'quotesinglbase', 'quotedblbase', 'perthousand', 'Acircumflex',
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'Ecircumflex', 'Aacute', 'Edieresis', 'Egrave', 'Iacute', 'Icircumflex',
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'Idieresis', 'Igrave', 'Oacute', 'Ocircumflex', 'apple', 'Ograve', 'Uacute',
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'Ucircumflex', 'Ugrave', 'dotlessi', 'circumflex', 'tilde', 'macron',
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'breve', 'dotaccent', 'ring', 'cedilla', 'hungarumlaut', 'ogonek', 'caron',
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'Lslash', 'lslash', 'Scaron', 'scaron', 'Zcaron', 'zcaron', 'brokenbar',
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'Eth', 'eth', 'Yacute', 'yacute', 'Thorn', 'thorn', 'minus', 'multiply',
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'onesuperior', 'twosuperior', 'threesuperior', 'onehalf', 'onequarter',
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'threequarters', 'franc', 'Gbreve', 'gbreve', 'Idotaccent', 'Scedilla',
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'scedilla', 'Cacute', 'cacute', 'Ccaron', 'ccaron', 'dcroat'];
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function adjustWidths(properties) {
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if (!properties.fontMatrix) {
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return;
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}
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if (properties.fontMatrix[0] === FONT_IDENTITY_MATRIX[0]) {
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return;
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}
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// adjusting width to fontMatrix scale
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var scale = 0.001 / properties.fontMatrix[0];
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var glyphsWidths = properties.widths;
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for (var glyph in glyphsWidths) {
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glyphsWidths[glyph] *= scale;
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}
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properties.defaultWidth *= scale;
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}
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function adjustToUnicode(properties, builtInEncoding) {
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if (properties.hasIncludedToUnicodeMap) {
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return; // The font dictionary has a `ToUnicode` entry.
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}
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if (properties.hasEncoding) {
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return; // The font dictionary has an `Encoding` entry.
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}
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if (builtInEncoding === properties.defaultEncoding) {
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return; // No point in trying to adjust `toUnicode` if the encodings match.
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}
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if (properties.toUnicode instanceof IdentityToUnicodeMap) {
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return;
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}
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var toUnicode = [], glyphsUnicodeMap = getGlyphsUnicode();
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for (var charCode in builtInEncoding) {
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var glyphName = builtInEncoding[charCode];
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var unicode = getUnicodeForGlyph(glyphName, glyphsUnicodeMap);
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if (unicode !== -1) {
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toUnicode[charCode] = String.fromCharCode(unicode);
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}
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}
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properties.toUnicode.amend(toUnicode);
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}
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function getFontType(type, subtype) {
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switch (type) {
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case 'Type1':
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return subtype === 'Type1C' ? FontType.TYPE1C : FontType.TYPE1;
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case 'CIDFontType0':
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return subtype === 'CIDFontType0C' ? FontType.CIDFONTTYPE0C :
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FontType.CIDFONTTYPE0;
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case 'OpenType':
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return FontType.OPENTYPE;
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case 'TrueType':
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return FontType.TRUETYPE;
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case 'CIDFontType2':
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return FontType.CIDFONTTYPE2;
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case 'MMType1':
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return FontType.MMTYPE1;
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case 'Type0':
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return FontType.TYPE0;
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default:
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return FontType.UNKNOWN;
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}
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}
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// Some bad PDF generators, e.g. Scribus PDF, include glyph names
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// in a 'uniXXXX' format -- attempting to recover proper ones.
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function recoverGlyphName(name, glyphsUnicodeMap) {
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if (glyphsUnicodeMap[name] !== undefined) {
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return name;
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}
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// The glyph name is non-standard, trying to recover.
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var unicode = getUnicodeForGlyph(name, glyphsUnicodeMap);
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if (unicode !== -1) {
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for (var key in glyphsUnicodeMap) {
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if (glyphsUnicodeMap[key] === unicode) {
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return key;
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}
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}
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}
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info('Unable to recover a standard glyph name for: ' + name);
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return name;
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}
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var Glyph = (function GlyphClosure() {
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function Glyph(fontChar, unicode, accent, width, vmetric, operatorListId,
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isSpace, isInFont) {
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this.fontChar = fontChar;
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this.unicode = unicode;
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this.accent = accent;
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this.width = width;
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this.vmetric = vmetric;
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this.operatorListId = operatorListId;
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this.isSpace = isSpace;
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this.isInFont = isInFont;
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}
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Glyph.prototype.matchesForCache = function(fontChar, unicode, accent, width,
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vmetric, operatorListId, isSpace,
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isInFont) {
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return this.fontChar === fontChar &&
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this.unicode === unicode &&
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this.accent === accent &&
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this.width === width &&
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this.vmetric === vmetric &&
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this.operatorListId === operatorListId &&
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this.isSpace === isSpace &&
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this.isInFont === isInFont;
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};
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return Glyph;
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})();
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var ToUnicodeMap = (function ToUnicodeMapClosure() {
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function ToUnicodeMap(cmap) {
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// The elements of this._map can be integers or strings, depending on how
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// |cmap| was created.
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this._map = cmap;
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}
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ToUnicodeMap.prototype = {
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get length() {
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return this._map.length;
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},
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forEach: function(callback) {
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for (var charCode in this._map) {
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callback(charCode, this._map[charCode].charCodeAt(0));
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}
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},
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has: function(i) {
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return this._map[i] !== undefined;
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},
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get: function(i) {
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return this._map[i];
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},
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charCodeOf: function(v) {
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return this._map.indexOf(v);
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},
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amend: function (map) {
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for (var charCode in map) {
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this._map[charCode] = map[charCode];
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}
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},
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};
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return ToUnicodeMap;
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})();
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var IdentityToUnicodeMap = (function IdentityToUnicodeMapClosure() {
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function IdentityToUnicodeMap(firstChar, lastChar) {
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this.firstChar = firstChar;
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this.lastChar = lastChar;
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}
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IdentityToUnicodeMap.prototype = {
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get length() {
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return (this.lastChar + 1) - this.firstChar;
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},
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forEach: function (callback) {
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for (var i = this.firstChar, ii = this.lastChar; i <= ii; i++) {
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callback(i, i);
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}
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},
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has: function (i) {
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return this.firstChar <= i && i <= this.lastChar;
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},
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get: function (i) {
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if (this.firstChar <= i && i <= this.lastChar) {
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return String.fromCharCode(i);
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}
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return undefined;
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},
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charCodeOf: function (v) {
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return (isInt(v) && v >= this.firstChar && v <= this.lastChar) ? v : -1;
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},
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amend: function (map) {
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error('Should not call amend()');
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},
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};
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return IdentityToUnicodeMap;
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})();
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var OpenTypeFileBuilder = (function OpenTypeFileBuilderClosure() {
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function writeInt16(dest, offset, num) {
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dest[offset] = (num >> 8) & 0xFF;
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dest[offset + 1] = num & 0xFF;
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}
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function writeInt32(dest, offset, num) {
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dest[offset] = (num >> 24) & 0xFF;
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dest[offset + 1] = (num >> 16) & 0xFF;
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dest[offset + 2] = (num >> 8) & 0xFF;
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dest[offset + 3] = num & 0xFF;
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}
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function writeData(dest, offset, data) {
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var i, ii;
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if (data instanceof Uint8Array) {
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dest.set(data, offset);
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} else if (typeof data === 'string') {
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for (i = 0, ii = data.length; i < ii; i++) {
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dest[offset++] = data.charCodeAt(i) & 0xFF;
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}
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} else {
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// treating everything else as array
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for (i = 0, ii = data.length; i < ii; i++) {
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dest[offset++] = data[i] & 0xFF;
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}
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}
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}
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function OpenTypeFileBuilder(sfnt) {
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this.sfnt = sfnt;
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this.tables = Object.create(null);
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}
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OpenTypeFileBuilder.getSearchParams =
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function OpenTypeFileBuilder_getSearchParams(entriesCount, entrySize) {
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var maxPower2 = 1, log2 = 0;
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while ((maxPower2 ^ entriesCount) > maxPower2) {
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maxPower2 <<= 1;
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log2++;
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}
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var searchRange = maxPower2 * entrySize;
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return {
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range: searchRange,
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entry: log2,
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rangeShift: entrySize * entriesCount - searchRange
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};
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};
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var OTF_HEADER_SIZE = 12;
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var OTF_TABLE_ENTRY_SIZE = 16;
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OpenTypeFileBuilder.prototype = {
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toArray: function OpenTypeFileBuilder_toArray() {
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var sfnt = this.sfnt;
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// Tables needs to be written by ascendant alphabetic order
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var tables = this.tables;
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var tablesNames = Object.keys(tables);
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tablesNames.sort();
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var numTables = tablesNames.length;
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var i, j, jj, table, tableName;
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// layout the tables data
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var offset = OTF_HEADER_SIZE + numTables * OTF_TABLE_ENTRY_SIZE;
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var tableOffsets = [offset];
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for (i = 0; i < numTables; i++) {
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table = tables[tablesNames[i]];
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var paddedLength = ((table.length + 3) & ~3) >>> 0;
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offset += paddedLength;
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tableOffsets.push(offset);
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}
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var file = new Uint8Array(offset);
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// write the table data first (mostly for checksum)
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for (i = 0; i < numTables; i++) {
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table = tables[tablesNames[i]];
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writeData(file, tableOffsets[i], table);
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}
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// sfnt version (4 bytes)
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if (sfnt === 'true') {
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// Windows hates the Mac TrueType sfnt version number
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sfnt = string32(0x00010000);
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}
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file[0] = sfnt.charCodeAt(0) & 0xFF;
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file[1] = sfnt.charCodeAt(1) & 0xFF;
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file[2] = sfnt.charCodeAt(2) & 0xFF;
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file[3] = sfnt.charCodeAt(3) & 0xFF;
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// numTables (2 bytes)
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writeInt16(file, 4, numTables);
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var searchParams = OpenTypeFileBuilder.getSearchParams(numTables, 16);
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// searchRange (2 bytes)
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writeInt16(file, 6, searchParams.range);
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// entrySelector (2 bytes)
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writeInt16(file, 8, searchParams.entry);
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|
// rangeShift (2 bytes)
|
|
writeInt16(file, 10, searchParams.rangeShift);
|
|
|
|
offset = OTF_HEADER_SIZE;
|
|
// writing table entries
|
|
for (i = 0; i < numTables; i++) {
|
|
tableName = tablesNames[i];
|
|
file[offset] = tableName.charCodeAt(0) & 0xFF;
|
|
file[offset + 1] = tableName.charCodeAt(1) & 0xFF;
|
|
file[offset + 2] = tableName.charCodeAt(2) & 0xFF;
|
|
file[offset + 3] = tableName.charCodeAt(3) & 0xFF;
|
|
|
|
// checksum
|
|
var checksum = 0;
|
|
for (j = tableOffsets[i], jj = tableOffsets[i + 1]; j < jj; j += 4) {
|
|
var quad = readUint32(file, j);
|
|
checksum = (checksum + quad) >>> 0;
|
|
}
|
|
writeInt32(file, offset + 4, checksum);
|
|
|
|
// offset
|
|
writeInt32(file, offset + 8, tableOffsets[i]);
|
|
// length
|
|
writeInt32(file, offset + 12, tables[tableName].length);
|
|
|
|
offset += OTF_TABLE_ENTRY_SIZE;
|
|
}
|
|
return file;
|
|
},
|
|
|
|
addTable: function OpenTypeFileBuilder_addTable(tag, data) {
|
|
if (tag in this.tables) {
|
|
throw new Error('Table ' + tag + ' already exists');
|
|
}
|
|
this.tables[tag] = data;
|
|
}
|
|
};
|
|
|
|
return OpenTypeFileBuilder;
|
|
})();
|
|
|
|
// Problematic Unicode characters in the fonts that needs to be moved to avoid
|
|
// issues when they are painted on the canvas, e.g. complex-script shaping or
|
|
// control/whitespace characters. The ranges are listed in pairs: the first item
|
|
// is a code of the first problematic code, the second one is the next
|
|
// non-problematic code. The ranges must be in sorted order.
|
|
var ProblematicCharRanges = new Int32Array([
|
|
// Control characters.
|
|
0x0000, 0x0020,
|
|
0x007F, 0x00A1,
|
|
0x00AD, 0x00AE,
|
|
// Chars that is used in complex-script shaping.
|
|
0x0600, 0x0780,
|
|
0x08A0, 0x10A0,
|
|
0x1780, 0x1800,
|
|
0x1C00, 0x1C50,
|
|
// General punctuation chars.
|
|
0x2000, 0x2010,
|
|
0x2011, 0x2012,
|
|
0x2028, 0x2030,
|
|
0x205F, 0x2070,
|
|
0x25CC, 0x25CD,
|
|
0x3000, 0x3001,
|
|
// Chars that is used in complex-script shaping.
|
|
0xAA60, 0xAA80,
|
|
// Specials Unicode block.
|
|
0xFFF0, 0x10000
|
|
]);
|
|
|
|
if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {
|
|
/**
|
|
* Used to validate the entries in `ProblematicCharRanges`, and to ensure that
|
|
* its total number of characters does not exceed the PUA (Private Use Area)
|
|
* length.
|
|
* @returns {Object} An object with {number} `numChars`, {number} `puaLength`,
|
|
* and {number} `percentage` parameters.
|
|
*/
|
|
var checkProblematicCharRanges = function checkProblematicCharRanges() {
|
|
function printRange(limits) {
|
|
return '[' + limits.lower.toString('16').toUpperCase() + ', ' +
|
|
limits.upper.toString('16').toUpperCase() + ')';
|
|
}
|
|
|
|
var numRanges = ProblematicCharRanges.length;
|
|
if (numRanges % 2 !== 0) {
|
|
throw new Error('Char ranges must contain an even number of elements.');
|
|
}
|
|
var prevLimits, numChars = 0;
|
|
for (var i = 0; i < numRanges; i += 2) {
|
|
var limits = {
|
|
lower: ProblematicCharRanges[i],
|
|
upper: ProblematicCharRanges[i + 1],
|
|
};
|
|
if (!isInt(limits.lower) || !isInt(limits.upper)) {
|
|
throw new Error('Range endpoints must be integers: ' +
|
|
printRange(limits));
|
|
}
|
|
if (limits.lower < 0 || limits.upper < 0) {
|
|
throw new Error('Range endpoints must be non-negative: ' +
|
|
printRange(limits));
|
|
}
|
|
var range = limits.upper - limits.lower;
|
|
if (range < 1) {
|
|
throw new Error('Range must contain at least one element: ' +
|
|
printRange(limits));
|
|
}
|
|
if (prevLimits) {
|
|
if (limits.lower < prevLimits.lower) {
|
|
throw new Error('Ranges must be sorted in ascending order: ' +
|
|
printRange(limits) + ', ' + printRange(prevLimits));
|
|
}
|
|
if (limits.lower < prevLimits.upper) {
|
|
throw new Error('Ranges must not overlap: ' +
|
|
printRange(limits) + ', ' + printRange(prevLimits));
|
|
}
|
|
}
|
|
prevLimits = {
|
|
lower: limits.lower,
|
|
upper: limits.upper,
|
|
};
|
|
// The current range is OK.
|
|
numChars += range;
|
|
}
|
|
var puaLength = (PRIVATE_USE_OFFSET_END + 1) - PRIVATE_USE_OFFSET_START;
|
|
if (numChars > puaLength) {
|
|
throw new Error('Total number of chars must not exceed the PUA length.');
|
|
}
|
|
return {
|
|
numChars: numChars,
|
|
puaLength: puaLength,
|
|
percentage: 100 * (numChars / puaLength),
|
|
};
|
|
};
|
|
|
|
exports.SEAC_ANALYSIS_ENABLED = SEAC_ANALYSIS_ENABLED;
|
|
exports.checkProblematicCharRanges = checkProblematicCharRanges;
|
|
}
|
|
|
|
/**
|
|
* 'Font' is the class the outside world should use, it encapsulate all the font
|
|
* decoding logics whatever type it is (assuming the font type is supported).
|
|
*
|
|
* For example to read a Type1 font and to attach it to the document:
|
|
* var type1Font = new Font("MyFontName", binaryFile, propertiesObject);
|
|
* type1Font.bind();
|
|
*/
|
|
var Font = (function FontClosure() {
|
|
function Font(name, file, properties) {
|
|
var charCode, glyphName, unicode;
|
|
|
|
this.name = name;
|
|
this.loadedName = properties.loadedName;
|
|
this.isType3Font = properties.isType3Font;
|
|
this.sizes = [];
|
|
this.missingFile = false;
|
|
|
|
this.glyphCache = Object.create(null);
|
|
|
|
this.isSerifFont = !!(properties.flags & FontFlags.Serif);
|
|
this.isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
|
|
this.isMonospace = !!(properties.flags & FontFlags.FixedPitch);
|
|
|
|
var type = properties.type;
|
|
var subtype = properties.subtype;
|
|
this.type = type;
|
|
|
|
this.fallbackName = (this.isMonospace ? 'monospace' :
|
|
(this.isSerifFont ? 'serif' : 'sans-serif'));
|
|
|
|
this.differences = properties.differences;
|
|
this.widths = properties.widths;
|
|
this.defaultWidth = properties.defaultWidth;
|
|
this.composite = properties.composite;
|
|
this.wideChars = properties.wideChars;
|
|
this.cMap = properties.cMap;
|
|
this.ascent = properties.ascent / PDF_GLYPH_SPACE_UNITS;
|
|
this.descent = properties.descent / PDF_GLYPH_SPACE_UNITS;
|
|
this.fontMatrix = properties.fontMatrix;
|
|
this.bbox = properties.bbox;
|
|
|
|
this.toUnicode = properties.toUnicode;
|
|
|
|
this.toFontChar = [];
|
|
|
|
if (properties.type === 'Type3') {
|
|
for (charCode = 0; charCode < 256; charCode++) {
|
|
this.toFontChar[charCode] = (this.differences[charCode] ||
|
|
properties.defaultEncoding[charCode]);
|
|
}
|
|
this.fontType = FontType.TYPE3;
|
|
return;
|
|
}
|
|
|
|
this.cidEncoding = properties.cidEncoding;
|
|
this.vertical = properties.vertical;
|
|
if (this.vertical) {
|
|
this.vmetrics = properties.vmetrics;
|
|
this.defaultVMetrics = properties.defaultVMetrics;
|
|
}
|
|
var glyphsUnicodeMap;
|
|
if (!file || file.isEmpty) {
|
|
if (file) {
|
|
// Some bad PDF generators will include empty font files,
|
|
// attempting to recover by assuming that no file exists.
|
|
warn('Font file is empty in "' + name + '" (' + this.loadedName + ')');
|
|
}
|
|
|
|
this.missingFile = true;
|
|
// The file data is not specified. Trying to fix the font name
|
|
// to be used with the canvas.font.
|
|
var fontName = name.replace(/[,_]/g, '-');
|
|
var stdFontMap = getStdFontMap(), nonStdFontMap = getNonStdFontMap();
|
|
var isStandardFont = !!stdFontMap[fontName] ||
|
|
!!(nonStdFontMap[fontName] && stdFontMap[nonStdFontMap[fontName]]);
|
|
fontName = stdFontMap[fontName] || nonStdFontMap[fontName] || fontName;
|
|
|
|
this.bold = (fontName.search(/bold/gi) !== -1);
|
|
this.italic = ((fontName.search(/oblique/gi) !== -1) ||
|
|
(fontName.search(/italic/gi) !== -1));
|
|
|
|
// Use 'name' instead of 'fontName' here because the original
|
|
// name ArialBlack for example will be replaced by Helvetica.
|
|
this.black = (name.search(/Black/g) !== -1);
|
|
|
|
// if at least one width is present, remeasure all chars when exists
|
|
this.remeasure = Object.keys(this.widths).length > 0;
|
|
if (isStandardFont && type === 'CIDFontType2' &&
|
|
properties.cidEncoding.indexOf('Identity-') === 0) {
|
|
var GlyphMapForStandardFonts = getGlyphMapForStandardFonts();
|
|
// Standard fonts might be embedded as CID font without glyph mapping.
|
|
// Building one based on GlyphMapForStandardFonts.
|
|
var map = [];
|
|
for (charCode in GlyphMapForStandardFonts) {
|
|
map[+charCode] = GlyphMapForStandardFonts[charCode];
|
|
}
|
|
if (/Arial-?Black/i.test(name)) {
|
|
var SupplementalGlyphMapForArialBlack =
|
|
getSupplementalGlyphMapForArialBlack();
|
|
for (charCode in SupplementalGlyphMapForArialBlack) {
|
|
map[+charCode] = SupplementalGlyphMapForArialBlack[charCode];
|
|
}
|
|
}
|
|
var isIdentityUnicode = this.toUnicode instanceof IdentityToUnicodeMap;
|
|
if (!isIdentityUnicode) {
|
|
this.toUnicode.forEach(function(charCode, unicodeCharCode) {
|
|
map[+charCode] = unicodeCharCode;
|
|
});
|
|
}
|
|
this.toFontChar = map;
|
|
this.toUnicode = new ToUnicodeMap(map);
|
|
} else if (/Symbol/i.test(fontName)) {
|
|
this.toFontChar = buildToFontChar(SymbolSetEncoding, getGlyphsUnicode(),
|
|
properties.differences);
|
|
} else if (/Dingbats/i.test(fontName)) {
|
|
if (/Wingdings/i.test(name)) {
|
|
warn('Non-embedded Wingdings font, falling back to ZapfDingbats.');
|
|
}
|
|
this.toFontChar = buildToFontChar(ZapfDingbatsEncoding,
|
|
getDingbatsGlyphsUnicode(),
|
|
properties.differences);
|
|
} else if (isStandardFont) {
|
|
this.toFontChar = buildToFontChar(properties.defaultEncoding,
|
|
getGlyphsUnicode(),
|
|
properties.differences);
|
|
} else {
|
|
glyphsUnicodeMap = getGlyphsUnicode();
|
|
this.toUnicode.forEach(function(charCode, unicodeCharCode) {
|
|
if (!this.composite) {
|
|
glyphName = (properties.differences[charCode] ||
|
|
properties.defaultEncoding[charCode]);
|
|
unicode = getUnicodeForGlyph(glyphName, glyphsUnicodeMap);
|
|
if (unicode !== -1) {
|
|
unicodeCharCode = unicode;
|
|
}
|
|
}
|
|
this.toFontChar[charCode] = unicodeCharCode;
|
|
}.bind(this));
|
|
}
|
|
this.loadedName = fontName.split('-')[0];
|
|
this.loading = false;
|
|
this.fontType = getFontType(type, subtype);
|
|
return;
|
|
}
|
|
|
|
// Some fonts might use wrong font types for Type1C or CIDFontType0C
|
|
if (subtype === 'Type1C') {
|
|
if (type !== 'Type1' && type !== 'MMType1') {
|
|
// Some TrueType fonts by mistake claim Type1C
|
|
if (isTrueTypeFile(file)) {
|
|
subtype = 'TrueType';
|
|
} else {
|
|
type = 'Type1';
|
|
}
|
|
} else if (isOpenTypeFile(file)) {
|
|
// Sometimes the type/subtype can be a complete lie (see issue7598.pdf).
|
|
type = subtype = 'OpenType';
|
|
}
|
|
}
|
|
if (subtype === 'CIDFontType0C' && type !== 'CIDFontType0') {
|
|
type = 'CIDFontType0';
|
|
}
|
|
if (subtype === 'OpenType') {
|
|
type = 'OpenType';
|
|
}
|
|
// Some CIDFontType0C fonts by mistake claim CIDFontType0.
|
|
if (type === 'CIDFontType0') {
|
|
if (isType1File(file)) {
|
|
subtype = 'CIDFontType0';
|
|
} else if (isOpenTypeFile(file)) {
|
|
// Sometimes the type/subtype can be a complete lie (see issue6782.pdf).
|
|
type = subtype = 'OpenType';
|
|
} else {
|
|
subtype = 'CIDFontType0C';
|
|
}
|
|
}
|
|
|
|
var data;
|
|
switch (type) {
|
|
case 'MMType1':
|
|
info('MMType1 font (' + name + '), falling back to Type1.');
|
|
/* falls through */
|
|
case 'Type1':
|
|
case 'CIDFontType0':
|
|
this.mimetype = 'font/opentype';
|
|
|
|
var cff = (subtype === 'Type1C' || subtype === 'CIDFontType0C') ?
|
|
new CFFFont(file, properties) : new Type1Font(name, file, properties);
|
|
|
|
adjustWidths(properties);
|
|
|
|
// Wrap the CFF data inside an OTF font file
|
|
data = this.convert(name, cff, properties);
|
|
break;
|
|
|
|
case 'OpenType':
|
|
case 'TrueType':
|
|
case 'CIDFontType2':
|
|
this.mimetype = 'font/opentype';
|
|
|
|
// Repair the TrueType file. It is can be damaged in the point of
|
|
// view of the sanitizer
|
|
data = this.checkAndRepair(name, file, properties);
|
|
if (this.isOpenType) {
|
|
adjustWidths(properties);
|
|
|
|
type = 'OpenType';
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error('Font ' + type + ' is not supported');
|
|
break;
|
|
}
|
|
|
|
this.data = data;
|
|
this.fontType = getFontType(type, subtype);
|
|
|
|
// Transfer some properties again that could change during font conversion
|
|
this.fontMatrix = properties.fontMatrix;
|
|
this.widths = properties.widths;
|
|
this.defaultWidth = properties.defaultWidth;
|
|
this.toUnicode = properties.toUnicode;
|
|
this.encoding = properties.baseEncoding;
|
|
this.seacMap = properties.seacMap;
|
|
|
|
this.loading = true;
|
|
}
|
|
|
|
Font.getFontID = (function () {
|
|
var ID = 1;
|
|
return function Font_getFontID() {
|
|
return String(ID++);
|
|
};
|
|
})();
|
|
|
|
function int16(b0, b1) {
|
|
return (b0 << 8) + b1;
|
|
}
|
|
|
|
function signedInt16(b0, b1) {
|
|
var value = (b0 << 8) + b1;
|
|
return value & (1 << 15) ? value - 0x10000 : value;
|
|
}
|
|
|
|
function int32(b0, b1, b2, b3) {
|
|
return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3;
|
|
}
|
|
|
|
function string16(value) {
|
|
return String.fromCharCode((value >> 8) & 0xff, value & 0xff);
|
|
}
|
|
|
|
function safeString16(value) {
|
|
// clamp value to the 16-bit int range
|
|
value = (value > 0x7FFF ? 0x7FFF : (value < -0x8000 ? -0x8000 : value));
|
|
return String.fromCharCode((value >> 8) & 0xff, value & 0xff);
|
|
}
|
|
|
|
function isTrueTypeFile(file) {
|
|
var header = file.peekBytes(4);
|
|
return readUint32(header, 0) === 0x00010000;
|
|
}
|
|
|
|
function isOpenTypeFile(file) {
|
|
var header = file.peekBytes(4);
|
|
return bytesToString(header) === 'OTTO';
|
|
}
|
|
|
|
function isType1File(file) {
|
|
var header = file.peekBytes(2);
|
|
// All Type1 font programs must begin with the comment '%!' (0x25 + 0x21).
|
|
if (header[0] === 0x25 && header[1] === 0x21) {
|
|
return true;
|
|
}
|
|
// ... obviously some fonts violate that part of the specification,
|
|
// please refer to the comment in |Type1Font| below.
|
|
if (header[0] === 0x80 && header[1] === 0x01) { // pfb file header.
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function buildToFontChar(encoding, glyphsUnicodeMap, differences) {
|
|
var toFontChar = [], unicode;
|
|
for (var i = 0, ii = encoding.length; i < ii; i++) {
|
|
unicode = getUnicodeForGlyph(encoding[i], glyphsUnicodeMap);
|
|
if (unicode !== -1) {
|
|
toFontChar[i] = unicode;
|
|
}
|
|
}
|
|
for (var charCode in differences) {
|
|
unicode = getUnicodeForGlyph(differences[charCode], glyphsUnicodeMap);
|
|
if (unicode !== -1) {
|
|
toFontChar[+charCode] = unicode;
|
|
}
|
|
}
|
|
return toFontChar;
|
|
}
|
|
|
|
/**
|
|
* Helper function for `adjustMapping`.
|
|
* @return {boolean}
|
|
*/
|
|
function isProblematicUnicodeLocation(code) {
|
|
// Using binary search to find a range start.
|
|
var i = 0, j = ProblematicCharRanges.length - 1;
|
|
while (i < j) {
|
|
var c = (i + j + 1) >> 1;
|
|
if (code < ProblematicCharRanges[c]) {
|
|
j = c - 1;
|
|
} else {
|
|
i = c;
|
|
}
|
|
}
|
|
// Even index means code in problematic range.
|
|
return !(i & 1);
|
|
}
|
|
|
|
/**
|
|
* Rebuilds the char code to glyph ID map by trying to replace the char codes
|
|
* with their unicode value. It also moves char codes that are in known
|
|
* problematic locations.
|
|
* @return {Object} Two properties:
|
|
* 'toFontChar' - maps original char codes(the value that will be read
|
|
* from commands such as show text) to the char codes that will be used in the
|
|
* font that we build
|
|
* 'charCodeToGlyphId' - maps the new font char codes to glyph ids
|
|
*/
|
|
function adjustMapping(charCodeToGlyphId, properties) {
|
|
var toUnicode = properties.toUnicode;
|
|
var isSymbolic = !!(properties.flags & FontFlags.Symbolic);
|
|
var isIdentityUnicode =
|
|
properties.toUnicode instanceof IdentityToUnicodeMap;
|
|
var newMap = Object.create(null);
|
|
var toFontChar = [];
|
|
var usedFontCharCodes = [];
|
|
var nextAvailableFontCharCode = PRIVATE_USE_OFFSET_START;
|
|
for (var originalCharCode in charCodeToGlyphId) {
|
|
originalCharCode |= 0;
|
|
var glyphId = charCodeToGlyphId[originalCharCode];
|
|
var fontCharCode = originalCharCode;
|
|
// First try to map the value to a unicode position if a non identity map
|
|
// was created.
|
|
var hasUnicodeValue = false;
|
|
if (!isIdentityUnicode && toUnicode.has(originalCharCode)) {
|
|
hasUnicodeValue = true;
|
|
var unicode = toUnicode.get(fontCharCode);
|
|
// TODO: Try to map ligatures to the correct spot.
|
|
if (unicode.length === 1) {
|
|
fontCharCode = unicode.charCodeAt(0);
|
|
}
|
|
}
|
|
// Try to move control characters, special characters and already mapped
|
|
// characters to the private use area since they will not be drawn by
|
|
// canvas if left in their current position. Also, move characters if the
|
|
// font was symbolic and there is only an identity unicode map since the
|
|
// characters probably aren't in the correct position (fixes an issue
|
|
// with firefox and thuluthfont).
|
|
if ((usedFontCharCodes[fontCharCode] !== undefined ||
|
|
isProblematicUnicodeLocation(fontCharCode) ||
|
|
(isSymbolic && !hasUnicodeValue)) &&
|
|
nextAvailableFontCharCode <= PRIVATE_USE_OFFSET_END) { // Room left.
|
|
// Loop to try and find a free spot in the private use area.
|
|
do {
|
|
fontCharCode = nextAvailableFontCharCode++;
|
|
|
|
if (SKIP_PRIVATE_USE_RANGE_F000_TO_F01F && fontCharCode === 0xF000) {
|
|
fontCharCode = 0xF020;
|
|
nextAvailableFontCharCode = fontCharCode + 1;
|
|
}
|
|
|
|
} while (usedFontCharCodes[fontCharCode] !== undefined &&
|
|
nextAvailableFontCharCode <= PRIVATE_USE_OFFSET_END);
|
|
}
|
|
|
|
newMap[fontCharCode] = glyphId;
|
|
toFontChar[originalCharCode] = fontCharCode;
|
|
usedFontCharCodes[fontCharCode] = true;
|
|
}
|
|
return {
|
|
toFontChar: toFontChar,
|
|
charCodeToGlyphId: newMap,
|
|
nextAvailableFontCharCode: nextAvailableFontCharCode
|
|
};
|
|
}
|
|
|
|
function getRanges(glyphs, numGlyphs) {
|
|
// Array.sort() sorts by characters, not numerically, so convert to an
|
|
// array of characters.
|
|
var codes = [];
|
|
for (var charCode in glyphs) {
|
|
// Remove an invalid glyph ID mappings to make OTS happy.
|
|
if (glyphs[charCode] >= numGlyphs) {
|
|
continue;
|
|
}
|
|
codes.push({ fontCharCode: charCode | 0, glyphId: glyphs[charCode] });
|
|
}
|
|
codes.sort(function fontGetRangesSort(a, b) {
|
|
return a.fontCharCode - b.fontCharCode;
|
|
});
|
|
|
|
// Split the sorted codes into ranges.
|
|
var ranges = [];
|
|
var length = codes.length;
|
|
for (var n = 0; n < length; ) { // eslint-disable-line space-in-parens
|
|
var start = codes[n].fontCharCode;
|
|
var codeIndices = [codes[n].glyphId];
|
|
++n;
|
|
var end = start;
|
|
while (n < length && end + 1 === codes[n].fontCharCode) {
|
|
codeIndices.push(codes[n].glyphId);
|
|
++end;
|
|
++n;
|
|
if (end === 0xFFFF) {
|
|
break;
|
|
}
|
|
}
|
|
ranges.push([start, end, codeIndices]);
|
|
}
|
|
|
|
return ranges;
|
|
}
|
|
|
|
function createCmapTable(glyphs, numGlyphs) {
|
|
var ranges = getRanges(glyphs, numGlyphs);
|
|
var numTables = ranges[ranges.length - 1][1] > 0xFFFF ? 2 : 1;
|
|
var cmap = '\x00\x00' + // version
|
|
string16(numTables) + // numTables
|
|
'\x00\x03' + // platformID
|
|
'\x00\x01' + // encodingID
|
|
string32(4 + numTables * 8); // start of the table record
|
|
|
|
var i, ii, j, jj;
|
|
for (i = ranges.length - 1; i >= 0; --i) {
|
|
if (ranges[i][0] <= 0xFFFF) {
|
|
break;
|
|
}
|
|
}
|
|
var bmpLength = i + 1;
|
|
|
|
if (ranges[i][0] < 0xFFFF && ranges[i][1] === 0xFFFF) {
|
|
ranges[i][1] = 0xFFFE;
|
|
}
|
|
var trailingRangesCount = ranges[i][1] < 0xFFFF ? 1 : 0;
|
|
var segCount = bmpLength + trailingRangesCount;
|
|
var searchParams = OpenTypeFileBuilder.getSearchParams(segCount, 2);
|
|
|
|
// Fill up the 4 parallel arrays describing the segments.
|
|
var startCount = '';
|
|
var endCount = '';
|
|
var idDeltas = '';
|
|
var idRangeOffsets = '';
|
|
var glyphsIds = '';
|
|
var bias = 0;
|
|
|
|
var range, start, end, codes;
|
|
for (i = 0, ii = bmpLength; i < ii; i++) {
|
|
range = ranges[i];
|
|
start = range[0];
|
|
end = range[1];
|
|
startCount += string16(start);
|
|
endCount += string16(end);
|
|
codes = range[2];
|
|
var contiguous = true;
|
|
for (j = 1, jj = codes.length; j < jj; ++j) {
|
|
if (codes[j] !== codes[j - 1] + 1) {
|
|
contiguous = false;
|
|
break;
|
|
}
|
|
}
|
|
if (!contiguous) {
|
|
var offset = (segCount - i) * 2 + bias * 2;
|
|
bias += (end - start + 1);
|
|
|
|
idDeltas += string16(0);
|
|
idRangeOffsets += string16(offset);
|
|
|
|
for (j = 0, jj = codes.length; j < jj; ++j) {
|
|
glyphsIds += string16(codes[j]);
|
|
}
|
|
} else {
|
|
var startCode = codes[0];
|
|
|
|
idDeltas += string16((startCode - start) & 0xFFFF);
|
|
idRangeOffsets += string16(0);
|
|
}
|
|
}
|
|
|
|
if (trailingRangesCount > 0) {
|
|
endCount += '\xFF\xFF';
|
|
startCount += '\xFF\xFF';
|
|
idDeltas += '\x00\x01';
|
|
idRangeOffsets += '\x00\x00';
|
|
}
|
|
|
|
var format314 = '\x00\x00' + // language
|
|
string16(2 * segCount) +
|
|
string16(searchParams.range) +
|
|
string16(searchParams.entry) +
|
|
string16(searchParams.rangeShift) +
|
|
endCount + '\x00\x00' + startCount +
|
|
idDeltas + idRangeOffsets + glyphsIds;
|
|
|
|
var format31012 = '';
|
|
var header31012 = '';
|
|
if (numTables > 1) {
|
|
cmap += '\x00\x03' + // platformID
|
|
'\x00\x0A' + // encodingID
|
|
string32(4 + numTables * 8 +
|
|
4 + format314.length); // start of the table record
|
|
format31012 = '';
|
|
for (i = 0, ii = ranges.length; i < ii; i++) {
|
|
range = ranges[i];
|
|
start = range[0];
|
|
codes = range[2];
|
|
var code = codes[0];
|
|
for (j = 1, jj = codes.length; j < jj; ++j) {
|
|
if (codes[j] !== codes[j - 1] + 1) {
|
|
end = range[0] + j - 1;
|
|
format31012 += string32(start) + // startCharCode
|
|
string32(end) + // endCharCode
|
|
string32(code); // startGlyphID
|
|
start = end + 1;
|
|
code = codes[j];
|
|
}
|
|
}
|
|
format31012 += string32(start) + // startCharCode
|
|
string32(range[1]) + // endCharCode
|
|
string32(code); // startGlyphID
|
|
}
|
|
header31012 = '\x00\x0C' + // format
|
|
'\x00\x00' + // reserved
|
|
string32(format31012.length + 16) + // length
|
|
'\x00\x00\x00\x00' + // language
|
|
string32(format31012.length / 12); // nGroups
|
|
}
|
|
|
|
return cmap + '\x00\x04' + // format
|
|
string16(format314.length + 4) + // length
|
|
format314 + header31012 + format31012;
|
|
}
|
|
|
|
function validateOS2Table(os2) {
|
|
var stream = new Stream(os2.data);
|
|
var version = stream.getUint16();
|
|
// TODO verify all OS/2 tables fields, but currently we validate only those
|
|
// that give us issues
|
|
stream.getBytes(60); // skipping type, misc sizes, panose, unicode ranges
|
|
var selection = stream.getUint16();
|
|
if (version < 4 && (selection & 0x0300)) {
|
|
return false;
|
|
}
|
|
var firstChar = stream.getUint16();
|
|
var lastChar = stream.getUint16();
|
|
if (firstChar > lastChar) {
|
|
return false;
|
|
}
|
|
stream.getBytes(6); // skipping sTypoAscender/Descender/LineGap
|
|
var usWinAscent = stream.getUint16();
|
|
if (usWinAscent === 0) { // makes font unreadable by windows
|
|
return false;
|
|
}
|
|
|
|
// OS/2 appears to be valid, resetting some fields
|
|
os2.data[8] = os2.data[9] = 0; // IE rejects fonts if fsType != 0
|
|
return true;
|
|
}
|
|
|
|
function createOS2Table(properties, charstrings, override) {
|
|
override = override || {
|
|
unitsPerEm: 0,
|
|
yMax: 0,
|
|
yMin: 0,
|
|
ascent: 0,
|
|
descent: 0
|
|
};
|
|
|
|
var ulUnicodeRange1 = 0;
|
|
var ulUnicodeRange2 = 0;
|
|
var ulUnicodeRange3 = 0;
|
|
var ulUnicodeRange4 = 0;
|
|
|
|
var firstCharIndex = null;
|
|
var lastCharIndex = 0;
|
|
|
|
if (charstrings) {
|
|
for (var code in charstrings) {
|
|
code |= 0;
|
|
if (firstCharIndex > code || !firstCharIndex) {
|
|
firstCharIndex = code;
|
|
}
|
|
if (lastCharIndex < code) {
|
|
lastCharIndex = code;
|
|
}
|
|
|
|
var position = getUnicodeRangeFor(code);
|
|
if (position < 32) {
|
|
ulUnicodeRange1 |= 1 << position;
|
|
} else if (position < 64) {
|
|
ulUnicodeRange2 |= 1 << position - 32;
|
|
} else if (position < 96) {
|
|
ulUnicodeRange3 |= 1 << position - 64;
|
|
} else if (position < 123) {
|
|
ulUnicodeRange4 |= 1 << position - 96;
|
|
} else {
|
|
error('Unicode ranges Bits > 123 are reserved for internal usage');
|
|
}
|
|
}
|
|
} else {
|
|
// TODO
|
|
firstCharIndex = 0;
|
|
lastCharIndex = 255;
|
|
}
|
|
|
|
var bbox = properties.bbox || [0, 0, 0, 0];
|
|
var unitsPerEm = (override.unitsPerEm ||
|
|
1 / (properties.fontMatrix || FONT_IDENTITY_MATRIX)[0]);
|
|
|
|
// if the font units differ to the PDF glyph space units
|
|
// then scale up the values
|
|
var scale = (properties.ascentScaled ? 1.0 :
|
|
unitsPerEm / PDF_GLYPH_SPACE_UNITS);
|
|
|
|
var typoAscent = (override.ascent ||
|
|
Math.round(scale * (properties.ascent || bbox[3])));
|
|
var typoDescent = (override.descent ||
|
|
Math.round(scale * (properties.descent || bbox[1])));
|
|
if (typoDescent > 0 && properties.descent > 0 && bbox[1] < 0) {
|
|
typoDescent = -typoDescent; // fixing incorrect descent
|
|
}
|
|
var winAscent = override.yMax || typoAscent;
|
|
var winDescent = -override.yMin || -typoDescent;
|
|
|
|
return '\x00\x03' + // version
|
|
'\x02\x24' + // xAvgCharWidth
|
|
'\x01\xF4' + // usWeightClass
|
|
'\x00\x05' + // usWidthClass
|
|
'\x00\x00' + // fstype (0 to let the font loads via font-face on IE)
|
|
'\x02\x8A' + // ySubscriptXSize
|
|
'\x02\xBB' + // ySubscriptYSize
|
|
'\x00\x00' + // ySubscriptXOffset
|
|
'\x00\x8C' + // ySubscriptYOffset
|
|
'\x02\x8A' + // ySuperScriptXSize
|
|
'\x02\xBB' + // ySuperScriptYSize
|
|
'\x00\x00' + // ySuperScriptXOffset
|
|
'\x01\xDF' + // ySuperScriptYOffset
|
|
'\x00\x31' + // yStrikeOutSize
|
|
'\x01\x02' + // yStrikeOutPosition
|
|
'\x00\x00' + // sFamilyClass
|
|
'\x00\x00\x06' +
|
|
String.fromCharCode(properties.fixedPitch ? 0x09 : 0x00) +
|
|
'\x00\x00\x00\x00\x00\x00' + // Panose
|
|
string32(ulUnicodeRange1) + // ulUnicodeRange1 (Bits 0-31)
|
|
string32(ulUnicodeRange2) + // ulUnicodeRange2 (Bits 32-63)
|
|
string32(ulUnicodeRange3) + // ulUnicodeRange3 (Bits 64-95)
|
|
string32(ulUnicodeRange4) + // ulUnicodeRange4 (Bits 96-127)
|
|
'\x2A\x32\x31\x2A' + // achVendID
|
|
string16(properties.italicAngle ? 1 : 0) + // fsSelection
|
|
string16(firstCharIndex ||
|
|
properties.firstChar) + // usFirstCharIndex
|
|
string16(lastCharIndex || properties.lastChar) + // usLastCharIndex
|
|
string16(typoAscent) + // sTypoAscender
|
|
string16(typoDescent) + // sTypoDescender
|
|
'\x00\x64' + // sTypoLineGap (7%-10% of the unitsPerEM value)
|
|
string16(winAscent) + // usWinAscent
|
|
string16(winDescent) + // usWinDescent
|
|
'\x00\x00\x00\x00' + // ulCodePageRange1 (Bits 0-31)
|
|
'\x00\x00\x00\x00' + // ulCodePageRange2 (Bits 32-63)
|
|
string16(properties.xHeight) + // sxHeight
|
|
string16(properties.capHeight) + // sCapHeight
|
|
string16(0) + // usDefaultChar
|
|
string16(firstCharIndex || properties.firstChar) + // usBreakChar
|
|
'\x00\x03'; // usMaxContext
|
|
}
|
|
|
|
function createPostTable(properties) {
|
|
var angle = Math.floor(properties.italicAngle * (Math.pow(2, 16)));
|
|
return ('\x00\x03\x00\x00' + // Version number
|
|
string32(angle) + // italicAngle
|
|
'\x00\x00' + // underlinePosition
|
|
'\x00\x00' + // underlineThickness
|
|
string32(properties.fixedPitch) + // isFixedPitch
|
|
'\x00\x00\x00\x00' + // minMemType42
|
|
'\x00\x00\x00\x00' + // maxMemType42
|
|
'\x00\x00\x00\x00' + // minMemType1
|
|
'\x00\x00\x00\x00'); // maxMemType1
|
|
}
|
|
|
|
function createNameTable(name, proto) {
|
|
if (!proto) {
|
|
proto = [[], []]; // no strings and unicode strings
|
|
}
|
|
|
|
var strings = [
|
|
proto[0][0] || 'Original licence', // 0.Copyright
|
|
proto[0][1] || name, // 1.Font family
|
|
proto[0][2] || 'Unknown', // 2.Font subfamily (font weight)
|
|
proto[0][3] || 'uniqueID', // 3.Unique ID
|
|
proto[0][4] || name, // 4.Full font name
|
|
proto[0][5] || 'Version 0.11', // 5.Version
|
|
proto[0][6] || '', // 6.Postscript name
|
|
proto[0][7] || 'Unknown', // 7.Trademark
|
|
proto[0][8] || 'Unknown', // 8.Manufacturer
|
|
proto[0][9] || 'Unknown' // 9.Designer
|
|
];
|
|
|
|
// Mac want 1-byte per character strings while Windows want
|
|
// 2-bytes per character, so duplicate the names table
|
|
var stringsUnicode = [];
|
|
var i, ii, j, jj, str;
|
|
for (i = 0, ii = strings.length; i < ii; i++) {
|
|
str = proto[1][i] || strings[i];
|
|
|
|
var strBufUnicode = [];
|
|
for (j = 0, jj = str.length; j < jj; j++) {
|
|
strBufUnicode.push(string16(str.charCodeAt(j)));
|
|
}
|
|
stringsUnicode.push(strBufUnicode.join(''));
|
|
}
|
|
|
|
var names = [strings, stringsUnicode];
|
|
var platforms = ['\x00\x01', '\x00\x03'];
|
|
var encodings = ['\x00\x00', '\x00\x01'];
|
|
var languages = ['\x00\x00', '\x04\x09'];
|
|
|
|
var namesRecordCount = strings.length * platforms.length;
|
|
var nameTable =
|
|
'\x00\x00' + // format
|
|
string16(namesRecordCount) + // Number of names Record
|
|
string16(namesRecordCount * 12 + 6); // Storage
|
|
|
|
// Build the name records field
|
|
var strOffset = 0;
|
|
for (i = 0, ii = platforms.length; i < ii; i++) {
|
|
var strs = names[i];
|
|
for (j = 0, jj = strs.length; j < jj; j++) {
|
|
str = strs[j];
|
|
var nameRecord =
|
|
platforms[i] + // platform ID
|
|
encodings[i] + // encoding ID
|
|
languages[i] + // language ID
|
|
string16(j) + // name ID
|
|
string16(str.length) +
|
|
string16(strOffset);
|
|
nameTable += nameRecord;
|
|
strOffset += str.length;
|
|
}
|
|
}
|
|
|
|
nameTable += strings.join('') + stringsUnicode.join('');
|
|
return nameTable;
|
|
}
|
|
|
|
Font.prototype = {
|
|
name: null,
|
|
font: null,
|
|
mimetype: null,
|
|
encoding: null,
|
|
get renderer() {
|
|
var renderer = FontRendererFactory.create(this, SEAC_ANALYSIS_ENABLED);
|
|
return shadow(this, 'renderer', renderer);
|
|
},
|
|
|
|
exportData: function Font_exportData() {
|
|
// TODO remove enumerating of the properties, e.g. hardcode exact names.
|
|
var data = {};
|
|
for (var i in this) {
|
|
if (this.hasOwnProperty(i)) {
|
|
data[i] = this[i];
|
|
}
|
|
}
|
|
return data;
|
|
},
|
|
|
|
checkAndRepair: function Font_checkAndRepair(name, font, properties) {
|
|
function readTableEntry(file) {
|
|
var tag = bytesToString(file.getBytes(4));
|
|
|
|
var checksum = file.getInt32() >>> 0;
|
|
var offset = file.getInt32() >>> 0;
|
|
var length = file.getInt32() >>> 0;
|
|
|
|
// Read the table associated data
|
|
var previousPosition = file.pos;
|
|
file.pos = file.start ? file.start : 0;
|
|
file.skip(offset);
|
|
var data = file.getBytes(length);
|
|
file.pos = previousPosition;
|
|
|
|
if (tag === 'head') {
|
|
// clearing checksum adjustment
|
|
data[8] = data[9] = data[10] = data[11] = 0;
|
|
data[17] |= 0x20; // Set font optimized for cleartype flag.
|
|
}
|
|
|
|
return {
|
|
tag: tag,
|
|
checksum: checksum,
|
|
length: length,
|
|
offset: offset,
|
|
data: data
|
|
};
|
|
}
|
|
|
|
function readOpenTypeHeader(ttf) {
|
|
return {
|
|
version: bytesToString(ttf.getBytes(4)),
|
|
numTables: ttf.getUint16(),
|
|
searchRange: ttf.getUint16(),
|
|
entrySelector: ttf.getUint16(),
|
|
rangeShift: ttf.getUint16()
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Read the appropriate subtable from the cmap according to 9.6.6.4 from
|
|
* PDF spec
|
|
*/
|
|
function readCmapTable(cmap, font, isSymbolicFont, hasEncoding) {
|
|
if (!cmap) {
|
|
warn('No cmap table available.');
|
|
return {
|
|
platformId: -1,
|
|
encodingId: -1,
|
|
mappings: [],
|
|
hasShortCmap: false
|
|
};
|
|
}
|
|
var segment;
|
|
var start = (font.start ? font.start : 0) + cmap.offset;
|
|
font.pos = start;
|
|
|
|
font.getUint16(); // version
|
|
var numTables = font.getUint16();
|
|
|
|
var potentialTable;
|
|
var canBreak = false;
|
|
// There's an order of preference in terms of which cmap subtable to
|
|
// use:
|
|
// - non-symbolic fonts the preference is a 3,1 table then a 1,0 table
|
|
// - symbolic fonts the preference is a 3,0 table then a 1,0 table
|
|
// The following takes advantage of the fact that the tables are sorted
|
|
// to work.
|
|
for (var i = 0; i < numTables; i++) {
|
|
var platformId = font.getUint16();
|
|
var encodingId = font.getUint16();
|
|
var offset = font.getInt32() >>> 0;
|
|
var useTable = false;
|
|
|
|
if (platformId === 0 && encodingId === 0) {
|
|
useTable = true;
|
|
// Continue the loop since there still may be a higher priority
|
|
// table.
|
|
} else if (platformId === 1 && encodingId === 0) {
|
|
useTable = true;
|
|
// Continue the loop since there still may be a higher priority
|
|
// table.
|
|
} else if (platformId === 3 && encodingId === 1 &&
|
|
(hasEncoding || !potentialTable)) {
|
|
useTable = true;
|
|
if (!isSymbolicFont) {
|
|
canBreak = true;
|
|
}
|
|
} else if (isSymbolicFont && platformId === 3 && encodingId === 0) {
|
|
useTable = true;
|
|
canBreak = true;
|
|
}
|
|
|
|
if (useTable) {
|
|
potentialTable = {
|
|
platformId: platformId,
|
|
encodingId: encodingId,
|
|
offset: offset
|
|
};
|
|
}
|
|
if (canBreak) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (potentialTable) {
|
|
font.pos = start + potentialTable.offset;
|
|
}
|
|
if (!potentialTable || font.peekByte() === -1) {
|
|
warn('Could not find a preferred cmap table.');
|
|
return {
|
|
platformId: -1,
|
|
encodingId: -1,
|
|
mappings: [],
|
|
hasShortCmap: false
|
|
};
|
|
}
|
|
|
|
var format = font.getUint16();
|
|
font.getUint16(); // length
|
|
font.getUint16(); // language
|
|
|
|
var hasShortCmap = false;
|
|
var mappings = [];
|
|
var j, glyphId;
|
|
|
|
// TODO(mack): refactor this cmap subtable reading logic out
|
|
if (format === 0) {
|
|
for (j = 0; j < 256; j++) {
|
|
var index = font.getByte();
|
|
if (!index) {
|
|
continue;
|
|
}
|
|
mappings.push({
|
|
charCode: j,
|
|
glyphId: index
|
|
});
|
|
}
|
|
hasShortCmap = true;
|
|
} else if (format === 4) {
|
|
// re-creating the table in format 4 since the encoding
|
|
// might be changed
|
|
var segCount = (font.getUint16() >> 1);
|
|
font.getBytes(6); // skipping range fields
|
|
var segIndex, segments = [];
|
|
for (segIndex = 0; segIndex < segCount; segIndex++) {
|
|
segments.push({ end: font.getUint16() });
|
|
}
|
|
font.getUint16();
|
|
for (segIndex = 0; segIndex < segCount; segIndex++) {
|
|
segments[segIndex].start = font.getUint16();
|
|
}
|
|
|
|
for (segIndex = 0; segIndex < segCount; segIndex++) {
|
|
segments[segIndex].delta = font.getUint16();
|
|
}
|
|
|
|
var offsetsCount = 0;
|
|
for (segIndex = 0; segIndex < segCount; segIndex++) {
|
|
segment = segments[segIndex];
|
|
var rangeOffset = font.getUint16();
|
|
if (!rangeOffset) {
|
|
segment.offsetIndex = -1;
|
|
continue;
|
|
}
|
|
|
|
var offsetIndex = (rangeOffset >> 1) - (segCount - segIndex);
|
|
segment.offsetIndex = offsetIndex;
|
|
offsetsCount = Math.max(offsetsCount, offsetIndex +
|
|
segment.end - segment.start + 1);
|
|
}
|
|
|
|
var offsets = [];
|
|
for (j = 0; j < offsetsCount; j++) {
|
|
offsets.push(font.getUint16());
|
|
}
|
|
|
|
for (segIndex = 0; segIndex < segCount; segIndex++) {
|
|
segment = segments[segIndex];
|
|
start = segment.start;
|
|
var end = segment.end;
|
|
var delta = segment.delta;
|
|
offsetIndex = segment.offsetIndex;
|
|
|
|
for (j = start; j <= end; j++) {
|
|
if (j === 0xFFFF) {
|
|
continue;
|
|
}
|
|
|
|
glyphId = (offsetIndex < 0 ?
|
|
j : offsets[offsetIndex + j - start]);
|
|
glyphId = (glyphId + delta) & 0xFFFF;
|
|
if (glyphId === 0) {
|
|
continue;
|
|
}
|
|
mappings.push({
|
|
charCode: j,
|
|
glyphId: glyphId
|
|
});
|
|
}
|
|
}
|
|
} else if (format === 6) {
|
|
// Format 6 is a 2-bytes dense mapping, which means the font data
|
|
// lives glue together even if they are pretty far in the unicode
|
|
// table. (This looks weird, so I can have missed something), this
|
|
// works on Linux but seems to fails on Mac so let's rewrite the
|
|
// cmap table to a 3-1-4 style
|
|
var firstCode = font.getUint16();
|
|
var entryCount = font.getUint16();
|
|
|
|
for (j = 0; j < entryCount; j++) {
|
|
glyphId = font.getUint16();
|
|
var charCode = firstCode + j;
|
|
|
|
mappings.push({
|
|
charCode: charCode,
|
|
glyphId: glyphId
|
|
});
|
|
}
|
|
} else {
|
|
warn('cmap table has unsupported format: ' + format);
|
|
return {
|
|
platformId: -1,
|
|
encodingId: -1,
|
|
mappings: [],
|
|
hasShortCmap: false
|
|
};
|
|
}
|
|
|
|
// removing duplicate entries
|
|
mappings.sort(function (a, b) {
|
|
return a.charCode - b.charCode;
|
|
});
|
|
for (i = 1; i < mappings.length; i++) {
|
|
if (mappings[i - 1].charCode === mappings[i].charCode) {
|
|
mappings.splice(i, 1);
|
|
i--;
|
|
}
|
|
}
|
|
|
|
return {
|
|
platformId: potentialTable.platformId,
|
|
encodingId: potentialTable.encodingId,
|
|
mappings: mappings,
|
|
hasShortCmap: hasShortCmap
|
|
};
|
|
}
|
|
|
|
function sanitizeMetrics(font, header, metrics, numGlyphs) {
|
|
if (!header) {
|
|
if (metrics) {
|
|
metrics.data = null;
|
|
}
|
|
return;
|
|
}
|
|
|
|
font.pos = (font.start ? font.start : 0) + header.offset;
|
|
font.pos += header.length - 2;
|
|
var numOfMetrics = font.getUint16();
|
|
|
|
if (numOfMetrics > numGlyphs) {
|
|
info('The numOfMetrics (' + numOfMetrics + ') should not be ' +
|
|
'greater than the numGlyphs (' + numGlyphs + ')');
|
|
// Reduce numOfMetrics if it is greater than numGlyphs
|
|
numOfMetrics = numGlyphs;
|
|
header.data[34] = (numOfMetrics & 0xff00) >> 8;
|
|
header.data[35] = numOfMetrics & 0x00ff;
|
|
}
|
|
|
|
var numOfSidebearings = numGlyphs - numOfMetrics;
|
|
var numMissing = numOfSidebearings -
|
|
((metrics.length - numOfMetrics * 4) >> 1);
|
|
|
|
if (numMissing > 0) {
|
|
// For each missing glyph, we set both the width and lsb to 0 (zero).
|
|
// Since we need to add two properties for each glyph, this explains
|
|
// the use of |numMissing * 2| when initializing the typed array.
|
|
var entries = new Uint8Array(metrics.length + numMissing * 2);
|
|
entries.set(metrics.data);
|
|
metrics.data = entries;
|
|
}
|
|
}
|
|
|
|
function sanitizeGlyph(source, sourceStart, sourceEnd, dest, destStart,
|
|
hintsValid) {
|
|
if (sourceEnd - sourceStart <= 12) {
|
|
// glyph with data less than 12 is invalid one
|
|
return 0;
|
|
}
|
|
var glyf = source.subarray(sourceStart, sourceEnd);
|
|
var contoursCount = (glyf[0] << 8) | glyf[1];
|
|
if (contoursCount & 0x8000) {
|
|
// complex glyph, writing as is
|
|
dest.set(glyf, destStart);
|
|
return glyf.length;
|
|
}
|
|
|
|
var i, j = 10, flagsCount = 0;
|
|
for (i = 0; i < contoursCount; i++) {
|
|
var endPoint = (glyf[j] << 8) | glyf[j + 1];
|
|
flagsCount = endPoint + 1;
|
|
j += 2;
|
|
}
|
|
// skipping instructions
|
|
var instructionsStart = j;
|
|
var instructionsLength = (glyf[j] << 8) | glyf[j + 1];
|
|
j += 2 + instructionsLength;
|
|
var instructionsEnd = j;
|
|
// validating flags
|
|
var coordinatesLength = 0;
|
|
for (i = 0; i < flagsCount; i++) {
|
|
var flag = glyf[j++];
|
|
if (flag & 0xC0) {
|
|
// reserved flags must be zero, cleaning up
|
|
glyf[j - 1] = flag & 0x3F;
|
|
}
|
|
var xyLength = ((flag & 2) ? 1 : (flag & 16) ? 0 : 2) +
|
|
((flag & 4) ? 1 : (flag & 32) ? 0 : 2);
|
|
coordinatesLength += xyLength;
|
|
if (flag & 8) {
|
|
var repeat = glyf[j++];
|
|
i += repeat;
|
|
coordinatesLength += repeat * xyLength;
|
|
}
|
|
}
|
|
// glyph without coordinates will be rejected
|
|
if (coordinatesLength === 0) {
|
|
return 0;
|
|
}
|
|
var glyphDataLength = j + coordinatesLength;
|
|
if (glyphDataLength > glyf.length) {
|
|
// not enough data for coordinates
|
|
return 0;
|
|
}
|
|
if (!hintsValid && instructionsLength > 0) {
|
|
dest.set(glyf.subarray(0, instructionsStart), destStart);
|
|
dest.set([0, 0], destStart + instructionsStart);
|
|
dest.set(glyf.subarray(instructionsEnd, glyphDataLength),
|
|
destStart + instructionsStart + 2);
|
|
glyphDataLength -= instructionsLength;
|
|
if (glyf.length - glyphDataLength > 3) {
|
|
glyphDataLength = (glyphDataLength + 3) & ~3;
|
|
}
|
|
return glyphDataLength;
|
|
}
|
|
if (glyf.length - glyphDataLength > 3) {
|
|
// truncating and aligning to 4 bytes the long glyph data
|
|
glyphDataLength = (glyphDataLength + 3) & ~3;
|
|
dest.set(glyf.subarray(0, glyphDataLength), destStart);
|
|
return glyphDataLength;
|
|
}
|
|
// glyph data is fine
|
|
dest.set(glyf, destStart);
|
|
return glyf.length;
|
|
}
|
|
|
|
function sanitizeHead(head, numGlyphs, locaLength) {
|
|
var data = head.data;
|
|
|
|
// Validate version:
|
|
// Should always be 0x00010000
|
|
var version = int32(data[0], data[1], data[2], data[3]);
|
|
if (version >> 16 !== 1) {
|
|
info('Attempting to fix invalid version in head table: ' + version);
|
|
data[0] = 0;
|
|
data[1] = 1;
|
|
data[2] = 0;
|
|
data[3] = 0;
|
|
}
|
|
|
|
var indexToLocFormat = int16(data[50], data[51]);
|
|
if (indexToLocFormat < 0 || indexToLocFormat > 1) {
|
|
info('Attempting to fix invalid indexToLocFormat in head table: ' +
|
|
indexToLocFormat);
|
|
|
|
// The value of indexToLocFormat should be 0 if the loca table
|
|
// consists of short offsets, and should be 1 if the loca table
|
|
// consists of long offsets.
|
|
//
|
|
// The number of entries in the loca table should be numGlyphs + 1.
|
|
//
|
|
// Using this information, we can work backwards to deduce if the
|
|
// size of each offset in the loca table, and thus figure out the
|
|
// appropriate value for indexToLocFormat.
|
|
|
|
var numGlyphsPlusOne = numGlyphs + 1;
|
|
if (locaLength === numGlyphsPlusOne << 1) {
|
|
// 0x0000 indicates the loca table consists of short offsets
|
|
data[50] = 0;
|
|
data[51] = 0;
|
|
} else if (locaLength === numGlyphsPlusOne << 2) {
|
|
// 0x0001 indicates the loca table consists of long offsets
|
|
data[50] = 0;
|
|
data[51] = 1;
|
|
} else {
|
|
warn('Could not fix indexToLocFormat: ' + indexToLocFormat);
|
|
}
|
|
}
|
|
}
|
|
|
|
function sanitizeGlyphLocations(loca, glyf, numGlyphs,
|
|
isGlyphLocationsLong, hintsValid,
|
|
dupFirstEntry) {
|
|
var itemSize, itemDecode, itemEncode;
|
|
if (isGlyphLocationsLong) {
|
|
itemSize = 4;
|
|
itemDecode = function fontItemDecodeLong(data, offset) {
|
|
return (data[offset] << 24) | (data[offset + 1] << 16) |
|
|
(data[offset + 2] << 8) | data[offset + 3];
|
|
};
|
|
itemEncode = function fontItemEncodeLong(data, offset, value) {
|
|
data[offset] = (value >>> 24) & 0xFF;
|
|
data[offset + 1] = (value >> 16) & 0xFF;
|
|
data[offset + 2] = (value >> 8) & 0xFF;
|
|
data[offset + 3] = value & 0xFF;
|
|
};
|
|
} else {
|
|
itemSize = 2;
|
|
itemDecode = function fontItemDecode(data, offset) {
|
|
return (data[offset] << 9) | (data[offset + 1] << 1);
|
|
};
|
|
itemEncode = function fontItemEncode(data, offset, value) {
|
|
data[offset] = (value >> 9) & 0xFF;
|
|
data[offset + 1] = (value >> 1) & 0xFF;
|
|
};
|
|
}
|
|
var locaData = loca.data;
|
|
var locaDataSize = itemSize * (1 + numGlyphs);
|
|
// is loca.data too short or long?
|
|
if (locaData.length !== locaDataSize) {
|
|
locaData = new Uint8Array(locaDataSize);
|
|
locaData.set(loca.data.subarray(0, locaDataSize));
|
|
loca.data = locaData;
|
|
}
|
|
// removing the invalid glyphs
|
|
var oldGlyfData = glyf.data;
|
|
var oldGlyfDataLength = oldGlyfData.length;
|
|
var newGlyfData = new Uint8Array(oldGlyfDataLength);
|
|
var startOffset = itemDecode(locaData, 0);
|
|
var writeOffset = 0;
|
|
var missingGlyphData = Object.create(null);
|
|
itemEncode(locaData, 0, writeOffset);
|
|
var i, j;
|
|
for (i = 0, j = itemSize; i < numGlyphs; i++, j += itemSize) {
|
|
var endOffset = itemDecode(locaData, j);
|
|
if (endOffset > oldGlyfDataLength &&
|
|
((oldGlyfDataLength + 3) & ~3) === endOffset) {
|
|
// Aspose breaks fonts by aligning the glyphs to the qword, but not
|
|
// the glyf table size, which makes last glyph out of range.
|
|
endOffset = oldGlyfDataLength;
|
|
}
|
|
if (endOffset > oldGlyfDataLength) {
|
|
// glyph end offset points outside glyf data, rejecting the glyph
|
|
itemEncode(locaData, j, writeOffset);
|
|
startOffset = endOffset;
|
|
continue;
|
|
}
|
|
|
|
if (startOffset === endOffset) {
|
|
missingGlyphData[i] = true;
|
|
}
|
|
|
|
var newLength = sanitizeGlyph(oldGlyfData, startOffset, endOffset,
|
|
newGlyfData, writeOffset, hintsValid);
|
|
writeOffset += newLength;
|
|
itemEncode(locaData, j, writeOffset);
|
|
startOffset = endOffset;
|
|
}
|
|
|
|
if (writeOffset === 0) {
|
|
// glyf table cannot be empty -- redoing the glyf and loca tables
|
|
// to have single glyph with one point
|
|
var simpleGlyph = new Uint8Array(
|
|
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 49, 0]);
|
|
for (i = 0, j = itemSize; i < numGlyphs; i++, j += itemSize) {
|
|
itemEncode(locaData, j, simpleGlyph.length);
|
|
}
|
|
glyf.data = simpleGlyph;
|
|
return missingGlyphData;
|
|
}
|
|
|
|
if (dupFirstEntry) {
|
|
var firstEntryLength = itemDecode(locaData, itemSize);
|
|
if (newGlyfData.length > firstEntryLength + writeOffset) {
|
|
glyf.data = newGlyfData.subarray(0, firstEntryLength + writeOffset);
|
|
} else {
|
|
glyf.data = new Uint8Array(firstEntryLength + writeOffset);
|
|
glyf.data.set(newGlyfData.subarray(0, writeOffset));
|
|
}
|
|
glyf.data.set(newGlyfData.subarray(0, firstEntryLength), writeOffset);
|
|
itemEncode(loca.data, locaData.length - itemSize,
|
|
writeOffset + firstEntryLength);
|
|
} else {
|
|
glyf.data = newGlyfData.subarray(0, writeOffset);
|
|
}
|
|
return missingGlyphData;
|
|
}
|
|
|
|
function readPostScriptTable(post, properties, maxpNumGlyphs) {
|
|
var start = (font.start ? font.start : 0) + post.offset;
|
|
font.pos = start;
|
|
|
|
var length = post.length, end = start + length;
|
|
var version = font.getInt32();
|
|
// skip rest to the tables
|
|
font.getBytes(28);
|
|
|
|
var glyphNames;
|
|
var valid = true;
|
|
var i;
|
|
|
|
switch (version) {
|
|
case 0x00010000:
|
|
glyphNames = MacStandardGlyphOrdering;
|
|
break;
|
|
case 0x00020000:
|
|
var numGlyphs = font.getUint16();
|
|
if (numGlyphs !== maxpNumGlyphs) {
|
|
valid = false;
|
|
break;
|
|
}
|
|
var glyphNameIndexes = [];
|
|
for (i = 0; i < numGlyphs; ++i) {
|
|
var index = font.getUint16();
|
|
if (index >= 32768) {
|
|
valid = false;
|
|
break;
|
|
}
|
|
glyphNameIndexes.push(index);
|
|
}
|
|
if (!valid) {
|
|
break;
|
|
}
|
|
var customNames = [];
|
|
var strBuf = [];
|
|
while (font.pos < end) {
|
|
var stringLength = font.getByte();
|
|
strBuf.length = stringLength;
|
|
for (i = 0; i < stringLength; ++i) {
|
|
strBuf[i] = String.fromCharCode(font.getByte());
|
|
}
|
|
customNames.push(strBuf.join(''));
|
|
}
|
|
glyphNames = [];
|
|
for (i = 0; i < numGlyphs; ++i) {
|
|
var j = glyphNameIndexes[i];
|
|
if (j < 258) {
|
|
glyphNames.push(MacStandardGlyphOrdering[j]);
|
|
continue;
|
|
}
|
|
glyphNames.push(customNames[j - 258]);
|
|
}
|
|
break;
|
|
case 0x00030000:
|
|
break;
|
|
default:
|
|
warn('Unknown/unsupported post table version ' + version);
|
|
valid = false;
|
|
if (properties.defaultEncoding) {
|
|
glyphNames = properties.defaultEncoding;
|
|
}
|
|
break;
|
|
}
|
|
properties.glyphNames = glyphNames;
|
|
return valid;
|
|
}
|
|
|
|
function readNameTable(nameTable) {
|
|
var start = (font.start ? font.start : 0) + nameTable.offset;
|
|
font.pos = start;
|
|
|
|
var names = [[], []];
|
|
var length = nameTable.length, end = start + length;
|
|
var format = font.getUint16();
|
|
var FORMAT_0_HEADER_LENGTH = 6;
|
|
if (format !== 0 || length < FORMAT_0_HEADER_LENGTH) {
|
|
// unsupported name table format or table "too" small
|
|
return names;
|
|
}
|
|
var numRecords = font.getUint16();
|
|
var stringsStart = font.getUint16();
|
|
var records = [];
|
|
var NAME_RECORD_LENGTH = 12;
|
|
var i, ii;
|
|
|
|
for (i = 0; i < numRecords &&
|
|
font.pos + NAME_RECORD_LENGTH <= end; i++) {
|
|
var r = {
|
|
platform: font.getUint16(),
|
|
encoding: font.getUint16(),
|
|
language: font.getUint16(),
|
|
name: font.getUint16(),
|
|
length: font.getUint16(),
|
|
offset: font.getUint16()
|
|
};
|
|
// using only Macintosh and Windows platform/encoding names
|
|
if ((r.platform === 1 && r.encoding === 0 && r.language === 0) ||
|
|
(r.platform === 3 && r.encoding === 1 && r.language === 0x409)) {
|
|
records.push(r);
|
|
}
|
|
}
|
|
for (i = 0, ii = records.length; i < ii; i++) {
|
|
var record = records[i];
|
|
if (record.length <= 0) {
|
|
continue; // Nothing to process, ignoring.
|
|
}
|
|
var pos = start + stringsStart + record.offset;
|
|
if (pos + record.length > end) {
|
|
continue; // outside of name table, ignoring
|
|
}
|
|
font.pos = pos;
|
|
var nameIndex = record.name;
|
|
if (record.encoding) {
|
|
// unicode
|
|
var str = '';
|
|
for (var j = 0, jj = record.length; j < jj; j += 2) {
|
|
str += String.fromCharCode(font.getUint16());
|
|
}
|
|
names[1][nameIndex] = str;
|
|
} else {
|
|
names[0][nameIndex] = bytesToString(font.getBytes(record.length));
|
|
}
|
|
}
|
|
return names;
|
|
}
|
|
|
|
var TTOpsStackDeltas = [
|
|
0, 0, 0, 0, 0, 0, 0, 0, -2, -2, -2, -2, 0, 0, -2, -5,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, 0, 0, -1, 0, -1, -1, -1, -1,
|
|
1, -1, -999, 0, 1, 0, -1, -2, 0, -1, -2, -1, -1, 0, -1, -1,
|
|
0, 0, -999, -999, -1, -1, -1, -1, -2, -999, -2, -2, -999, 0, -2, -2,
|
|
0, 0, -2, 0, -2, 0, 0, 0, -2, -1, -1, 1, 1, 0, 0, -1,
|
|
-1, -1, -1, -1, -1, -1, 0, 0, -1, 0, -1, -1, 0, -999, -1, -1,
|
|
-1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
-2, -999, -999, -999, -999, -999, -1, -1, -2, -2, 0, 0, 0, 0, -1, -1,
|
|
-999, -2, -2, 0, 0, -1, -2, -2, 0, 0, 0, -1, -1, -1, -2];
|
|
// 0xC0-DF == -1 and 0xE0-FF == -2
|
|
|
|
function sanitizeTTProgram(table, ttContext) {
|
|
var data = table.data;
|
|
var i = 0, j, n, b, funcId, pc, lastEndf = 0, lastDeff = 0;
|
|
var stack = [];
|
|
var callstack = [];
|
|
var functionsCalled = [];
|
|
var tooComplexToFollowFunctions =
|
|
ttContext.tooComplexToFollowFunctions;
|
|
var inFDEF = false, ifLevel = 0, inELSE = 0;
|
|
for (var ii = data.length; i < ii;) {
|
|
var op = data[i++];
|
|
// The TrueType instruction set docs can be found at
|
|
// https://developer.apple.com/fonts/TTRefMan/RM05/Chap5.html
|
|
if (op === 0x40) { // NPUSHB - pushes n bytes
|
|
n = data[i++];
|
|
if (inFDEF || inELSE) {
|
|
i += n;
|
|
} else {
|
|
for (j = 0; j < n; j++) {
|
|
stack.push(data[i++]);
|
|
}
|
|
}
|
|
} else if (op === 0x41) { // NPUSHW - pushes n words
|
|
n = data[i++];
|
|
if (inFDEF || inELSE) {
|
|
i += n * 2;
|
|
} else {
|
|
for (j = 0; j < n; j++) {
|
|
b = data[i++];
|
|
stack.push((b << 8) | data[i++]);
|
|
}
|
|
}
|
|
} else if ((op & 0xF8) === 0xB0) { // PUSHB - pushes bytes
|
|
n = op - 0xB0 + 1;
|
|
if (inFDEF || inELSE) {
|
|
i += n;
|
|
} else {
|
|
for (j = 0; j < n; j++) {
|
|
stack.push(data[i++]);
|
|
}
|
|
}
|
|
} else if ((op & 0xF8) === 0xB8) { // PUSHW - pushes words
|
|
n = op - 0xB8 + 1;
|
|
if (inFDEF || inELSE) {
|
|
i += n * 2;
|
|
} else {
|
|
for (j = 0; j < n; j++) {
|
|
b = data[i++];
|
|
stack.push((b << 8) | data[i++]);
|
|
}
|
|
}
|
|
} else if (op === 0x2B && !tooComplexToFollowFunctions) { // CALL
|
|
if (!inFDEF && !inELSE) {
|
|
// collecting inforamtion about which functions are used
|
|
funcId = stack[stack.length - 1];
|
|
ttContext.functionsUsed[funcId] = true;
|
|
if (funcId in ttContext.functionsStackDeltas) {
|
|
stack.length += ttContext.functionsStackDeltas[funcId];
|
|
} else if (funcId in ttContext.functionsDefined &&
|
|
functionsCalled.indexOf(funcId) < 0) {
|
|
callstack.push({data: data, i: i, stackTop: stack.length - 1});
|
|
functionsCalled.push(funcId);
|
|
pc = ttContext.functionsDefined[funcId];
|
|
if (!pc) {
|
|
warn('TT: CALL non-existent function');
|
|
ttContext.hintsValid = false;
|
|
return;
|
|
}
|
|
data = pc.data;
|
|
i = pc.i;
|
|
}
|
|
}
|
|
} else if (op === 0x2C && !tooComplexToFollowFunctions) { // FDEF
|
|
if (inFDEF || inELSE) {
|
|
warn('TT: nested FDEFs not allowed');
|
|
tooComplexToFollowFunctions = true;
|
|
}
|
|
inFDEF = true;
|
|
// collecting inforamtion about which functions are defined
|
|
lastDeff = i;
|
|
funcId = stack.pop();
|
|
ttContext.functionsDefined[funcId] = {data: data, i: i};
|
|
} else if (op === 0x2D) { // ENDF - end of function
|
|
if (inFDEF) {
|
|
inFDEF = false;
|
|
lastEndf = i;
|
|
} else {
|
|
pc = callstack.pop();
|
|
if (!pc) {
|
|
warn('TT: ENDF bad stack');
|
|
ttContext.hintsValid = false;
|
|
return;
|
|
}
|
|
funcId = functionsCalled.pop();
|
|
data = pc.data;
|
|
i = pc.i;
|
|
ttContext.functionsStackDeltas[funcId] =
|
|
stack.length - pc.stackTop;
|
|
}
|
|
} else if (op === 0x89) { // IDEF - instruction definition
|
|
if (inFDEF || inELSE) {
|
|
warn('TT: nested IDEFs not allowed');
|
|
tooComplexToFollowFunctions = true;
|
|
}
|
|
inFDEF = true;
|
|
// recording it as a function to track ENDF
|
|
lastDeff = i;
|
|
} else if (op === 0x58) { // IF
|
|
++ifLevel;
|
|
} else if (op === 0x1B) { // ELSE
|
|
inELSE = ifLevel;
|
|
} else if (op === 0x59) { // EIF
|
|
if (inELSE === ifLevel) {
|
|
inELSE = 0;
|
|
}
|
|
--ifLevel;
|
|
} else if (op === 0x1C) { // JMPR
|
|
if (!inFDEF && !inELSE) {
|
|
var offset = stack[stack.length - 1];
|
|
// only jumping forward to prevent infinite loop
|
|
if (offset > 0) {
|
|
i += offset - 1;
|
|
}
|
|
}
|
|
}
|
|
// Adjusting stack not extactly, but just enough to get function id
|
|
if (!inFDEF && !inELSE) {
|
|
var stackDelta = op <= 0x8E ? TTOpsStackDeltas[op] :
|
|
op >= 0xC0 && op <= 0xDF ? -1 : op >= 0xE0 ? -2 : 0;
|
|
if (op >= 0x71 && op <= 0x75) {
|
|
n = stack.pop();
|
|
if (!isNaN(n)) {
|
|
stackDelta = -n * 2;
|
|
}
|
|
}
|
|
while (stackDelta < 0 && stack.length > 0) {
|
|
stack.pop();
|
|
stackDelta++;
|
|
}
|
|
while (stackDelta > 0) {
|
|
stack.push(NaN); // pushing any number into stack
|
|
stackDelta--;
|
|
}
|
|
}
|
|
}
|
|
ttContext.tooComplexToFollowFunctions = tooComplexToFollowFunctions;
|
|
var content = [data];
|
|
if (i > data.length) {
|
|
content.push(new Uint8Array(i - data.length));
|
|
}
|
|
if (lastDeff > lastEndf) {
|
|
warn('TT: complementing a missing function tail');
|
|
// new function definition started, but not finished
|
|
// complete function by [CLEAR, ENDF]
|
|
content.push(new Uint8Array([0x22, 0x2D]));
|
|
}
|
|
foldTTTable(table, content);
|
|
}
|
|
|
|
function checkInvalidFunctions(ttContext, maxFunctionDefs) {
|
|
if (ttContext.tooComplexToFollowFunctions) {
|
|
return;
|
|
}
|
|
if (ttContext.functionsDefined.length > maxFunctionDefs) {
|
|
warn('TT: more functions defined than expected');
|
|
ttContext.hintsValid = false;
|
|
return;
|
|
}
|
|
for (var j = 0, jj = ttContext.functionsUsed.length; j < jj; j++) {
|
|
if (j > maxFunctionDefs) {
|
|
warn('TT: invalid function id: ' + j);
|
|
ttContext.hintsValid = false;
|
|
return;
|
|
}
|
|
if (ttContext.functionsUsed[j] && !ttContext.functionsDefined[j]) {
|
|
warn('TT: undefined function: ' + j);
|
|
ttContext.hintsValid = false;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
function foldTTTable(table, content) {
|
|
if (content.length > 1) {
|
|
// concatenating the content items
|
|
var newLength = 0;
|
|
var j, jj;
|
|
for (j = 0, jj = content.length; j < jj; j++) {
|
|
newLength += content[j].length;
|
|
}
|
|
newLength = (newLength + 3) & ~3;
|
|
var result = new Uint8Array(newLength);
|
|
var pos = 0;
|
|
for (j = 0, jj = content.length; j < jj; j++) {
|
|
result.set(content[j], pos);
|
|
pos += content[j].length;
|
|
}
|
|
table.data = result;
|
|
table.length = newLength;
|
|
}
|
|
}
|
|
|
|
function sanitizeTTPrograms(fpgm, prep, cvt, maxFunctionDefs) {
|
|
var ttContext = {
|
|
functionsDefined: [],
|
|
functionsUsed: [],
|
|
functionsStackDeltas: [],
|
|
tooComplexToFollowFunctions: false,
|
|
hintsValid: true
|
|
};
|
|
if (fpgm) {
|
|
sanitizeTTProgram(fpgm, ttContext);
|
|
}
|
|
if (prep) {
|
|
sanitizeTTProgram(prep, ttContext);
|
|
}
|
|
if (fpgm) {
|
|
checkInvalidFunctions(ttContext, maxFunctionDefs);
|
|
}
|
|
if (cvt && (cvt.length & 1)) {
|
|
var cvtData = new Uint8Array(cvt.length + 1);
|
|
cvtData.set(cvt.data);
|
|
cvt.data = cvtData;
|
|
}
|
|
return ttContext.hintsValid;
|
|
}
|
|
|
|
// The following steps modify the original font data, making copy
|
|
font = new Stream(new Uint8Array(font.getBytes()));
|
|
|
|
var VALID_TABLES = ['OS/2', 'cmap', 'head', 'hhea', 'hmtx', 'maxp',
|
|
'name', 'post', 'loca', 'glyf', 'fpgm', 'prep', 'cvt ', 'CFF '];
|
|
|
|
var header = readOpenTypeHeader(font);
|
|
var numTables = header.numTables;
|
|
var cff, cffFile;
|
|
|
|
var tables = Object.create(null);
|
|
tables['OS/2'] = null;
|
|
tables['cmap'] = null;
|
|
tables['head'] = null;
|
|
tables['hhea'] = null;
|
|
tables['hmtx'] = null;
|
|
tables['maxp'] = null;
|
|
tables['name'] = null;
|
|
tables['post'] = null;
|
|
|
|
var table;
|
|
for (var i = 0; i < numTables; i++) {
|
|
table = readTableEntry(font);
|
|
if (VALID_TABLES.indexOf(table.tag) < 0) {
|
|
continue; // skipping table if it's not a required or optional table
|
|
}
|
|
if (table.length === 0) {
|
|
continue; // skipping empty tables
|
|
}
|
|
tables[table.tag] = table;
|
|
}
|
|
|
|
var isTrueType = !tables['CFF '];
|
|
if (!isTrueType) {
|
|
// OpenType font
|
|
if ((header.version === 'OTTO' && !properties.composite) ||
|
|
!tables['head'] || !tables['hhea'] || !tables['maxp'] ||
|
|
!tables['post']) {
|
|
// no major tables: throwing everything at CFFFont
|
|
cffFile = new Stream(tables['CFF '].data);
|
|
cff = new CFFFont(cffFile, properties);
|
|
|
|
adjustWidths(properties);
|
|
|
|
return this.convert(name, cff, properties);
|
|
}
|
|
|
|
delete tables['glyf'];
|
|
delete tables['loca'];
|
|
delete tables['fpgm'];
|
|
delete tables['prep'];
|
|
delete tables['cvt '];
|
|
this.isOpenType = true;
|
|
} else {
|
|
if (!tables['loca']) {
|
|
error('Required "loca" table is not found');
|
|
}
|
|
if (!tables['glyf']) {
|
|
warn('Required "glyf" table is not found -- trying to recover.');
|
|
// Note: We use `sanitizeGlyphLocations` to add dummy glyf data below.
|
|
tables['glyf'] = {
|
|
tag: 'glyf',
|
|
data: new Uint8Array(0),
|
|
};
|
|
}
|
|
this.isOpenType = false;
|
|
}
|
|
|
|
if (!tables['maxp']) {
|
|
error('Required "maxp" table is not found');
|
|
}
|
|
|
|
font.pos = (font.start || 0) + tables['maxp'].offset;
|
|
var version = font.getInt32();
|
|
var numGlyphs = font.getUint16();
|
|
var maxFunctionDefs = 0;
|
|
if (version >= 0x00010000 && tables['maxp'].length >= 22) {
|
|
// maxZones can be invalid
|
|
font.pos += 8;
|
|
var maxZones = font.getUint16();
|
|
if (maxZones > 2) { // reset to 2 if font has invalid maxZones
|
|
tables['maxp'].data[14] = 0;
|
|
tables['maxp'].data[15] = 2;
|
|
}
|
|
font.pos += 4;
|
|
maxFunctionDefs = font.getUint16();
|
|
}
|
|
|
|
var dupFirstEntry = false;
|
|
if (properties.type === 'CIDFontType2' && properties.toUnicode &&
|
|
properties.toUnicode.get(0) > '\u0000') {
|
|
// oracle's defect (see 3427), duplicating first entry
|
|
dupFirstEntry = true;
|
|
numGlyphs++;
|
|
tables['maxp'].data[4] = numGlyphs >> 8;
|
|
tables['maxp'].data[5] = numGlyphs & 255;
|
|
}
|
|
|
|
var hintsValid = sanitizeTTPrograms(tables['fpgm'], tables['prep'],
|
|
tables['cvt '], maxFunctionDefs);
|
|
if (!hintsValid) {
|
|
delete tables['fpgm'];
|
|
delete tables['prep'];
|
|
delete tables['cvt '];
|
|
}
|
|
|
|
// Ensure the hmtx table contains the advance width and
|
|
// sidebearings information for numGlyphs in the maxp table
|
|
sanitizeMetrics(font, tables['hhea'], tables['hmtx'], numGlyphs);
|
|
|
|
if (!tables['head']) {
|
|
error('Required "head" table is not found');
|
|
}
|
|
|
|
sanitizeHead(tables['head'], numGlyphs,
|
|
isTrueType ? tables['loca'].length : 0);
|
|
|
|
var missingGlyphs = Object.create(null);
|
|
if (isTrueType) {
|
|
var isGlyphLocationsLong = int16(tables['head'].data[50],
|
|
tables['head'].data[51]);
|
|
missingGlyphs = sanitizeGlyphLocations(tables['loca'], tables['glyf'],
|
|
numGlyphs, isGlyphLocationsLong,
|
|
hintsValid, dupFirstEntry);
|
|
}
|
|
|
|
if (!tables['hhea']) {
|
|
error('Required "hhea" table is not found');
|
|
}
|
|
|
|
// Sanitizer reduces the glyph advanceWidth to the maxAdvanceWidth
|
|
// Sometimes it's 0. That needs to be fixed
|
|
if (tables['hhea'].data[10] === 0 && tables['hhea'].data[11] === 0) {
|
|
tables['hhea'].data[10] = 0xFF;
|
|
tables['hhea'].data[11] = 0xFF;
|
|
}
|
|
|
|
// Extract some more font properties from the OpenType head and
|
|
// hhea tables; yMin and descent value are always negative.
|
|
var metricsOverride = {
|
|
unitsPerEm: int16(tables['head'].data[18], tables['head'].data[19]),
|
|
yMax: int16(tables['head'].data[42], tables['head'].data[43]),
|
|
yMin: signedInt16(tables['head'].data[38], tables['head'].data[39]),
|
|
ascent: int16(tables['hhea'].data[4], tables['hhea'].data[5]),
|
|
descent: signedInt16(tables['hhea'].data[6], tables['hhea'].data[7])
|
|
};
|
|
|
|
// PDF FontDescriptor metrics lie -- using data from actual font.
|
|
this.ascent = metricsOverride.ascent / metricsOverride.unitsPerEm;
|
|
this.descent = metricsOverride.descent / metricsOverride.unitsPerEm;
|
|
|
|
// The 'post' table has glyphs names.
|
|
if (tables['post']) {
|
|
var valid = readPostScriptTable(tables['post'], properties, numGlyphs);
|
|
if (!valid) {
|
|
tables['post'] = null;
|
|
}
|
|
}
|
|
|
|
var charCodeToGlyphId = [], charCode;
|
|
var toUnicode = properties.toUnicode, widths = properties.widths;
|
|
var skipToUnicode = (toUnicode instanceof IdentityToUnicodeMap ||
|
|
toUnicode.length === 0x10000);
|
|
|
|
// Helper function to try to skip mapping of empty glyphs.
|
|
// Note: In some cases, just relying on the glyph data doesn't work,
|
|
// hence we also use a few heuristics to fix various PDF files.
|
|
function hasGlyph(glyphId, charCode, widthCode) {
|
|
if (!missingGlyphs[glyphId]) {
|
|
return true;
|
|
}
|
|
if (!skipToUnicode && charCode >= 0 && toUnicode.has(charCode)) {
|
|
return true;
|
|
}
|
|
if (widths && widthCode >= 0 && isNum(widths[widthCode])) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (properties.composite) {
|
|
var cidToGidMap = properties.cidToGidMap || [];
|
|
var isCidToGidMapEmpty = cidToGidMap.length === 0;
|
|
|
|
properties.cMap.forEach(function(charCode, cid) {
|
|
assert(cid <= 0xffff, 'Max size of CID is 65,535');
|
|
var glyphId = -1;
|
|
if (isCidToGidMapEmpty) {
|
|
glyphId = cid;
|
|
} else if (cidToGidMap[cid] !== undefined) {
|
|
glyphId = cidToGidMap[cid];
|
|
}
|
|
|
|
if (glyphId >= 0 && glyphId < numGlyphs &&
|
|
hasGlyph(glyphId, charCode, cid)) {
|
|
charCodeToGlyphId[charCode] = glyphId;
|
|
}
|
|
});
|
|
if (dupFirstEntry && (isCidToGidMapEmpty || !charCodeToGlyphId[0])) {
|
|
// We don't duplicate the first entry in the `charCodeToGlyphId` map
|
|
// if the font has a `CIDToGIDMap` which has already mapped the first
|
|
// entry to a non-zero `glyphId` (fixes issue7544.pdf).
|
|
charCodeToGlyphId[0] = numGlyphs - 1;
|
|
}
|
|
} else {
|
|
// Most of the following logic in this code branch is based on the
|
|
// 9.6.6.4 of the PDF spec.
|
|
var cmapTable = readCmapTable(tables['cmap'], font, this.isSymbolicFont,
|
|
properties.hasEncoding);
|
|
var cmapPlatformId = cmapTable.platformId;
|
|
var cmapEncodingId = cmapTable.encodingId;
|
|
var cmapMappings = cmapTable.mappings;
|
|
var cmapMappingsLength = cmapMappings.length;
|
|
|
|
// The spec seems to imply that if the font is symbolic the encoding
|
|
// should be ignored, this doesn't appear to work for 'preistabelle.pdf'
|
|
// where the the font is symbolic and it has an encoding.
|
|
if (properties.hasEncoding &&
|
|
(cmapPlatformId === 3 && cmapEncodingId === 1 ||
|
|
cmapPlatformId === 1 && cmapEncodingId === 0) ||
|
|
(cmapPlatformId === -1 && cmapEncodingId === -1 && // Temporary hack
|
|
!!getEncoding(properties.baseEncodingName))) { // Temporary hack
|
|
// When no preferred cmap table was found and |baseEncodingName| is
|
|
// one of the predefined encodings, we seem to obtain a better
|
|
// |charCodeToGlyphId| map from the code below (fixes bug 1057544).
|
|
// TODO: Note that this is a hack which should be removed as soon as
|
|
// we have proper support for more exotic cmap tables.
|
|
|
|
var baseEncoding = [];
|
|
if (properties.baseEncodingName === 'MacRomanEncoding' ||
|
|
properties.baseEncodingName === 'WinAnsiEncoding') {
|
|
baseEncoding = getEncoding(properties.baseEncodingName);
|
|
}
|
|
var glyphsUnicodeMap = getGlyphsUnicode();
|
|
for (charCode = 0; charCode < 256; charCode++) {
|
|
var glyphName, standardGlyphName;
|
|
if (this.differences && charCode in this.differences) {
|
|
glyphName = this.differences[charCode];
|
|
} else if (charCode in baseEncoding &&
|
|
baseEncoding[charCode] !== '') {
|
|
glyphName = baseEncoding[charCode];
|
|
} else {
|
|
glyphName = StandardEncoding[charCode];
|
|
}
|
|
if (!glyphName) {
|
|
continue;
|
|
}
|
|
// Ensure that non-standard glyph names are resolved to valid ones.
|
|
standardGlyphName = recoverGlyphName(glyphName, glyphsUnicodeMap);
|
|
|
|
var unicodeOrCharCode, isUnicode = false;
|
|
if (cmapPlatformId === 3 && cmapEncodingId === 1) {
|
|
unicodeOrCharCode = glyphsUnicodeMap[standardGlyphName];
|
|
isUnicode = true;
|
|
} else if (cmapPlatformId === 1 && cmapEncodingId === 0) {
|
|
// TODO: the encoding needs to be updated with mac os table.
|
|
unicodeOrCharCode = MacRomanEncoding.indexOf(standardGlyphName);
|
|
}
|
|
|
|
var found = false;
|
|
for (i = 0; i < cmapMappingsLength; ++i) {
|
|
if (cmapMappings[i].charCode !== unicodeOrCharCode) {
|
|
continue;
|
|
}
|
|
var code = isUnicode ? charCode : unicodeOrCharCode;
|
|
if (hasGlyph(cmapMappings[i].glyphId, code, -1)) {
|
|
charCodeToGlyphId[charCode] = cmapMappings[i].glyphId;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found && properties.glyphNames) {
|
|
// Try to map using the post table.
|
|
var glyphId = properties.glyphNames.indexOf(glyphName);
|
|
// The post table ought to use the same kind of glyph names as the
|
|
// `differences` array, but check the standard ones as a fallback.
|
|
if (glyphId === -1 && standardGlyphName !== glyphName) {
|
|
glyphId = properties.glyphNames.indexOf(standardGlyphName);
|
|
}
|
|
if (glyphId > 0 && hasGlyph(glyphId, -1, -1)) {
|
|
charCodeToGlyphId[charCode] = glyphId;
|
|
found = true;
|
|
}
|
|
}
|
|
if (!found) {
|
|
charCodeToGlyphId[charCode] = 0; // notdef
|
|
}
|
|
}
|
|
} else if (cmapPlatformId === 0 && cmapEncodingId === 0) {
|
|
// Default Unicode semantics, use the charcodes as is.
|
|
for (i = 0; i < cmapMappingsLength; ++i) {
|
|
charCodeToGlyphId[cmapMappings[i].charCode] =
|
|
cmapMappings[i].glyphId;
|
|
}
|
|
} else {
|
|
// For (3, 0) cmap tables:
|
|
// The charcode key being stored in charCodeToGlyphId is the lower
|
|
// byte of the two-byte charcodes of the cmap table since according to
|
|
// the spec: 'each byte from the string shall be prepended with the
|
|
// high byte of the range [of charcodes in the cmap table], to form
|
|
// a two-byte character, which shall be used to select the
|
|
// associated glyph description from the subtable'.
|
|
//
|
|
// For (1, 0) cmap tables:
|
|
// 'single bytes from the string shall be used to look up the
|
|
// associated glyph descriptions from the subtable'. This means
|
|
// charcodes in the cmap will be single bytes, so no-op since
|
|
// glyph.charCode & 0xFF === glyph.charCode
|
|
for (i = 0; i < cmapMappingsLength; ++i) {
|
|
charCode = cmapMappings[i].charCode & 0xFF;
|
|
charCodeToGlyphId[charCode] = cmapMappings[i].glyphId;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (charCodeToGlyphId.length === 0) {
|
|
// defines at least one glyph
|
|
charCodeToGlyphId[0] = 0;
|
|
}
|
|
|
|
// Converting glyphs and ids into font's cmap table
|
|
var newMapping = adjustMapping(charCodeToGlyphId, properties);
|
|
this.toFontChar = newMapping.toFontChar;
|
|
tables['cmap'] = {
|
|
tag: 'cmap',
|
|
data: createCmapTable(newMapping.charCodeToGlyphId, numGlyphs)
|
|
};
|
|
|
|
if (!tables['OS/2'] || !validateOS2Table(tables['OS/2'])) {
|
|
tables['OS/2'] = {
|
|
tag: 'OS/2',
|
|
data: createOS2Table(properties, newMapping.charCodeToGlyphId,
|
|
metricsOverride)
|
|
};
|
|
}
|
|
|
|
// Rewrite the 'post' table if needed
|
|
if (!tables['post']) {
|
|
tables['post'] = {
|
|
tag: 'post',
|
|
data: createPostTable(properties)
|
|
};
|
|
}
|
|
|
|
if (!isTrueType) {
|
|
try {
|
|
// Trying to repair CFF file
|
|
cffFile = new Stream(tables['CFF '].data);
|
|
var parser = new CFFParser(cffFile, properties,
|
|
SEAC_ANALYSIS_ENABLED);
|
|
cff = parser.parse();
|
|
var compiler = new CFFCompiler(cff);
|
|
tables['CFF '].data = compiler.compile();
|
|
} catch (e) {
|
|
warn('Failed to compile font ' + properties.loadedName);
|
|
}
|
|
}
|
|
|
|
// Re-creating 'name' table
|
|
if (!tables['name']) {
|
|
tables['name'] = {
|
|
tag: 'name',
|
|
data: createNameTable(this.name)
|
|
};
|
|
} else {
|
|
// ... using existing 'name' table as prototype
|
|
var namePrototype = readNameTable(tables['name']);
|
|
tables['name'].data = createNameTable(name, namePrototype);
|
|
}
|
|
|
|
var builder = new OpenTypeFileBuilder(header.version);
|
|
for (var tableTag in tables) {
|
|
builder.addTable(tableTag, tables[tableTag].data);
|
|
}
|
|
return builder.toArray();
|
|
},
|
|
|
|
convert: function Font_convert(fontName, font, properties) {
|
|
// TODO: Check the charstring widths to determine this.
|
|
properties.fixedPitch = false;
|
|
|
|
if (properties.builtInEncoding) {
|
|
// For Type1 fonts that do not include either `ToUnicode` or `Encoding`
|
|
// data, attempt to use the `builtInEncoding` to improve text selection.
|
|
adjustToUnicode(properties, properties.builtInEncoding);
|
|
}
|
|
|
|
var mapping = font.getGlyphMapping(properties);
|
|
var newMapping = adjustMapping(mapping, properties);
|
|
this.toFontChar = newMapping.toFontChar;
|
|
var numGlyphs = font.numGlyphs;
|
|
|
|
function getCharCodes(charCodeToGlyphId, glyphId) {
|
|
var charCodes = null;
|
|
for (var charCode in charCodeToGlyphId) {
|
|
if (glyphId === charCodeToGlyphId[charCode]) {
|
|
if (!charCodes) {
|
|
charCodes = [];
|
|
}
|
|
charCodes.push(charCode | 0);
|
|
}
|
|
}
|
|
return charCodes;
|
|
}
|
|
|
|
function createCharCode(charCodeToGlyphId, glyphId) {
|
|
for (var charCode in charCodeToGlyphId) {
|
|
if (glyphId === charCodeToGlyphId[charCode]) {
|
|
return charCode | 0;
|
|
}
|
|
}
|
|
newMapping.charCodeToGlyphId[newMapping.nextAvailableFontCharCode] =
|
|
glyphId;
|
|
return newMapping.nextAvailableFontCharCode++;
|
|
}
|
|
|
|
var seacs = font.seacs;
|
|
if (SEAC_ANALYSIS_ENABLED && seacs && seacs.length) {
|
|
var matrix = properties.fontMatrix || FONT_IDENTITY_MATRIX;
|
|
var charset = font.getCharset();
|
|
var seacMap = Object.create(null);
|
|
for (var glyphId in seacs) {
|
|
glyphId |= 0;
|
|
var seac = seacs[glyphId];
|
|
var baseGlyphName = StandardEncoding[seac[2]];
|
|
var accentGlyphName = StandardEncoding[seac[3]];
|
|
var baseGlyphId = charset.indexOf(baseGlyphName);
|
|
var accentGlyphId = charset.indexOf(accentGlyphName);
|
|
if (baseGlyphId < 0 || accentGlyphId < 0) {
|
|
continue;
|
|
}
|
|
var accentOffset = {
|
|
x: seac[0] * matrix[0] + seac[1] * matrix[2] + matrix[4],
|
|
y: seac[0] * matrix[1] + seac[1] * matrix[3] + matrix[5]
|
|
};
|
|
|
|
var charCodes = getCharCodes(mapping, glyphId);
|
|
if (!charCodes) {
|
|
// There's no point in mapping it if the char code was never mapped
|
|
// to begin with.
|
|
continue;
|
|
}
|
|
for (var i = 0, ii = charCodes.length; i < ii; i++) {
|
|
var charCode = charCodes[i];
|
|
// Find a fontCharCode that maps to the base and accent glyphs.
|
|
// If one doesn't exists, create it.
|
|
var charCodeToGlyphId = newMapping.charCodeToGlyphId;
|
|
var baseFontCharCode = createCharCode(charCodeToGlyphId,
|
|
baseGlyphId);
|
|
var accentFontCharCode = createCharCode(charCodeToGlyphId,
|
|
accentGlyphId);
|
|
seacMap[charCode] = {
|
|
baseFontCharCode: baseFontCharCode,
|
|
accentFontCharCode: accentFontCharCode,
|
|
accentOffset: accentOffset
|
|
};
|
|
}
|
|
}
|
|
properties.seacMap = seacMap;
|
|
}
|
|
|
|
var unitsPerEm = 1 / (properties.fontMatrix || FONT_IDENTITY_MATRIX)[0];
|
|
|
|
var builder = new OpenTypeFileBuilder('\x4F\x54\x54\x4F');
|
|
// PostScript Font Program
|
|
builder.addTable('CFF ', font.data);
|
|
// OS/2 and Windows Specific metrics
|
|
builder.addTable('OS/2', createOS2Table(properties,
|
|
newMapping.charCodeToGlyphId));
|
|
// Character to glyphs mapping
|
|
builder.addTable('cmap', createCmapTable(newMapping.charCodeToGlyphId,
|
|
numGlyphs));
|
|
// Font header
|
|
builder.addTable('head',
|
|
'\x00\x01\x00\x00' + // Version number
|
|
'\x00\x00\x10\x00' + // fontRevision
|
|
'\x00\x00\x00\x00' + // checksumAdjustement
|
|
'\x5F\x0F\x3C\xF5' + // magicNumber
|
|
'\x00\x00' + // Flags
|
|
safeString16(unitsPerEm) + // unitsPerEM
|
|
'\x00\x00\x00\x00\x9e\x0b\x7e\x27' + // creation date
|
|
'\x00\x00\x00\x00\x9e\x0b\x7e\x27' + // modifification date
|
|
'\x00\x00' + // xMin
|
|
safeString16(properties.descent) + // yMin
|
|
'\x0F\xFF' + // xMax
|
|
safeString16(properties.ascent) + // yMax
|
|
string16(properties.italicAngle ? 2 : 0) + // macStyle
|
|
'\x00\x11' + // lowestRecPPEM
|
|
'\x00\x00' + // fontDirectionHint
|
|
'\x00\x00' + // indexToLocFormat
|
|
'\x00\x00'); // glyphDataFormat
|
|
|
|
// Horizontal header
|
|
builder.addTable('hhea',
|
|
'\x00\x01\x00\x00' + // Version number
|
|
safeString16(properties.ascent) + // Typographic Ascent
|
|
safeString16(properties.descent) + // Typographic Descent
|
|
'\x00\x00' + // Line Gap
|
|
'\xFF\xFF' + // advanceWidthMax
|
|
'\x00\x00' + // minLeftSidebearing
|
|
'\x00\x00' + // minRightSidebearing
|
|
'\x00\x00' + // xMaxExtent
|
|
safeString16(properties.capHeight) + // caretSlopeRise
|
|
safeString16(Math.tan(properties.italicAngle) *
|
|
properties.xHeight) + // caretSlopeRun
|
|
'\x00\x00' + // caretOffset
|
|
'\x00\x00' + // -reserved-
|
|
'\x00\x00' + // -reserved-
|
|
'\x00\x00' + // -reserved-
|
|
'\x00\x00' + // -reserved-
|
|
'\x00\x00' + // metricDataFormat
|
|
string16(numGlyphs)); // Number of HMetrics
|
|
|
|
// Horizontal metrics
|
|
builder.addTable('hmtx', (function fontFieldsHmtx() {
|
|
var charstrings = font.charstrings;
|
|
var cffWidths = font.cff ? font.cff.widths : null;
|
|
var hmtx = '\x00\x00\x00\x00'; // Fake .notdef
|
|
for (var i = 1, ii = numGlyphs; i < ii; i++) {
|
|
var width = 0;
|
|
if (charstrings) {
|
|
var charstring = charstrings[i - 1];
|
|
width = 'width' in charstring ? charstring.width : 0;
|
|
} else if (cffWidths) {
|
|
width = Math.ceil(cffWidths[i] || 0);
|
|
}
|
|
hmtx += string16(width) + string16(0);
|
|
}
|
|
return hmtx;
|
|
})());
|
|
|
|
// Maximum profile
|
|
builder.addTable('maxp',
|
|
'\x00\x00\x50\x00' + // Version number
|
|
string16(numGlyphs)); // Num of glyphs
|
|
|
|
// Naming tables
|
|
builder.addTable('name', createNameTable(fontName));
|
|
|
|
// PostScript information
|
|
builder.addTable('post', createPostTable(properties));
|
|
|
|
return builder.toArray();
|
|
},
|
|
|
|
get spaceWidth() {
|
|
if ('_shadowWidth' in this) {
|
|
return this._shadowWidth;
|
|
}
|
|
|
|
// trying to estimate space character width
|
|
var possibleSpaceReplacements = ['space', 'minus', 'one', 'i', 'I'];
|
|
var width;
|
|
for (var i = 0, ii = possibleSpaceReplacements.length; i < ii; i++) {
|
|
var glyphName = possibleSpaceReplacements[i];
|
|
// if possible, getting width by glyph name
|
|
if (glyphName in this.widths) {
|
|
width = this.widths[glyphName];
|
|
break;
|
|
}
|
|
var glyphsUnicodeMap = getGlyphsUnicode();
|
|
var glyphUnicode = glyphsUnicodeMap[glyphName];
|
|
// finding the charcode via unicodeToCID map
|
|
var charcode = 0;
|
|
if (this.composite) {
|
|
if (this.cMap.contains(glyphUnicode)) {
|
|
charcode = this.cMap.lookup(glyphUnicode);
|
|
}
|
|
}
|
|
// ... via toUnicode map
|
|
if (!charcode && this.toUnicode) {
|
|
charcode = this.toUnicode.charCodeOf(glyphUnicode);
|
|
}
|
|
// setting it to unicode if negative or undefined
|
|
if (charcode <= 0) {
|
|
charcode = glyphUnicode;
|
|
}
|
|
// trying to get width via charcode
|
|
width = this.widths[charcode];
|
|
if (width) {
|
|
break; // the non-zero width found
|
|
}
|
|
}
|
|
width = width || this.defaultWidth;
|
|
// Do not shadow the property here. See discussion:
|
|
// https://github.com/mozilla/pdf.js/pull/2127#discussion_r1662280
|
|
this._shadowWidth = width;
|
|
return width;
|
|
},
|
|
|
|
charToGlyph: function Font_charToGlyph(charcode, isSpace) {
|
|
var fontCharCode, width, operatorListId;
|
|
|
|
var widthCode = charcode;
|
|
if (this.cMap && this.cMap.contains(charcode)) {
|
|
widthCode = this.cMap.lookup(charcode);
|
|
}
|
|
width = this.widths[widthCode];
|
|
width = isNum(width) ? width : this.defaultWidth;
|
|
var vmetric = this.vmetrics && this.vmetrics[widthCode];
|
|
|
|
var unicode = this.toUnicode.get(charcode) || charcode;
|
|
if (typeof unicode === 'number') {
|
|
unicode = String.fromCharCode(unicode);
|
|
}
|
|
|
|
var isInFont = charcode in this.toFontChar;
|
|
// First try the toFontChar map, if it's not there then try falling
|
|
// back to the char code.
|
|
fontCharCode = this.toFontChar[charcode] || charcode;
|
|
if (this.missingFile) {
|
|
fontCharCode = mapSpecialUnicodeValues(fontCharCode);
|
|
}
|
|
|
|
if (this.isType3Font) {
|
|
// Font char code in this case is actually a glyph name.
|
|
operatorListId = fontCharCode;
|
|
}
|
|
|
|
var accent = null;
|
|
if (this.seacMap && this.seacMap[charcode]) {
|
|
isInFont = true;
|
|
var seac = this.seacMap[charcode];
|
|
fontCharCode = seac.baseFontCharCode;
|
|
accent = {
|
|
fontChar: String.fromCharCode(seac.accentFontCharCode),
|
|
offset: seac.accentOffset
|
|
};
|
|
}
|
|
|
|
var fontChar = String.fromCharCode(fontCharCode);
|
|
|
|
var glyph = this.glyphCache[charcode];
|
|
if (!glyph ||
|
|
!glyph.matchesForCache(fontChar, unicode, accent, width, vmetric,
|
|
operatorListId, isSpace, isInFont)) {
|
|
glyph = new Glyph(fontChar, unicode, accent, width, vmetric,
|
|
operatorListId, isSpace, isInFont);
|
|
this.glyphCache[charcode] = glyph;
|
|
}
|
|
return glyph;
|
|
},
|
|
|
|
charsToGlyphs: function Font_charsToGlyphs(chars) {
|
|
var charsCache = this.charsCache;
|
|
var glyphs, glyph, charcode;
|
|
|
|
// if we translated this string before, just grab it from the cache
|
|
if (charsCache) {
|
|
glyphs = charsCache[chars];
|
|
if (glyphs) {
|
|
return glyphs;
|
|
}
|
|
}
|
|
|
|
// lazily create the translation cache
|
|
if (!charsCache) {
|
|
charsCache = this.charsCache = Object.create(null);
|
|
}
|
|
|
|
glyphs = [];
|
|
var charsCacheKey = chars;
|
|
var i = 0, ii;
|
|
|
|
if (this.cMap) {
|
|
// composite fonts have multi-byte strings convert the string from
|
|
// single-byte to multi-byte
|
|
var c = Object.create(null);
|
|
while (i < chars.length) {
|
|
this.cMap.readCharCode(chars, i, c);
|
|
charcode = c.charcode;
|
|
var length = c.length;
|
|
i += length;
|
|
// Space is char with code 0x20 and length 1 in multiple-byte codes.
|
|
var isSpace = length === 1 && chars.charCodeAt(i - 1) === 0x20;
|
|
glyph = this.charToGlyph(charcode, isSpace);
|
|
glyphs.push(glyph);
|
|
}
|
|
} else {
|
|
for (i = 0, ii = chars.length; i < ii; ++i) {
|
|
charcode = chars.charCodeAt(i);
|
|
glyph = this.charToGlyph(charcode, charcode === 0x20);
|
|
glyphs.push(glyph);
|
|
}
|
|
}
|
|
|
|
// Enter the translated string into the cache
|
|
return (charsCache[charsCacheKey] = glyphs);
|
|
}
|
|
};
|
|
|
|
return Font;
|
|
})();
|
|
|
|
var ErrorFont = (function ErrorFontClosure() {
|
|
function ErrorFont(error) {
|
|
this.error = error;
|
|
this.loadedName = 'g_font_error';
|
|
this.loading = false;
|
|
}
|
|
|
|
ErrorFont.prototype = {
|
|
charsToGlyphs: function ErrorFont_charsToGlyphs() {
|
|
return [];
|
|
},
|
|
exportData: function ErrorFont_exportData() {
|
|
return {error: this.error};
|
|
}
|
|
};
|
|
|
|
return ErrorFont;
|
|
})();
|
|
|
|
/**
|
|
* Shared logic for building a char code to glyph id mapping for Type1 and
|
|
* simple CFF fonts. See section 9.6.6.2 of the spec.
|
|
* @param {Object} properties Font properties object.
|
|
* @param {Object} builtInEncoding The encoding contained within the actual font
|
|
* data.
|
|
* @param {Array} glyphNames Array of glyph names where the index is the
|
|
* glyph ID.
|
|
* @returns {Object} A char code to glyph ID map.
|
|
*/
|
|
function type1FontGlyphMapping(properties, builtInEncoding, glyphNames) {
|
|
var charCodeToGlyphId = Object.create(null);
|
|
var glyphId, charCode, baseEncoding;
|
|
var isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
|
|
|
|
if (properties.baseEncodingName) {
|
|
// If a valid base encoding name was used, the mapping is initialized with
|
|
// that.
|
|
baseEncoding = getEncoding(properties.baseEncodingName);
|
|
for (charCode = 0; charCode < baseEncoding.length; charCode++) {
|
|
glyphId = glyphNames.indexOf(baseEncoding[charCode]);
|
|
if (glyphId >= 0) {
|
|
charCodeToGlyphId[charCode] = glyphId;
|
|
} else {
|
|
charCodeToGlyphId[charCode] = 0; // notdef
|
|
}
|
|
}
|
|
} else if (isSymbolicFont) {
|
|
// For a symbolic font the encoding should be the fonts built-in encoding.
|
|
for (charCode in builtInEncoding) {
|
|
charCodeToGlyphId[charCode] = builtInEncoding[charCode];
|
|
}
|
|
} else {
|
|
// For non-symbolic fonts that don't have a base encoding the standard
|
|
// encoding should be used.
|
|
baseEncoding = StandardEncoding;
|
|
for (charCode = 0; charCode < baseEncoding.length; charCode++) {
|
|
glyphId = glyphNames.indexOf(baseEncoding[charCode]);
|
|
if (glyphId >= 0) {
|
|
charCodeToGlyphId[charCode] = glyphId;
|
|
} else {
|
|
charCodeToGlyphId[charCode] = 0; // notdef
|
|
}
|
|
}
|
|
}
|
|
|
|
// Lastly, merge in the differences.
|
|
var differences = properties.differences, glyphsUnicodeMap;
|
|
if (differences) {
|
|
for (charCode in differences) {
|
|
var glyphName = differences[charCode];
|
|
glyphId = glyphNames.indexOf(glyphName);
|
|
|
|
if (glyphId === -1) {
|
|
if (!glyphsUnicodeMap) {
|
|
glyphsUnicodeMap = getGlyphsUnicode();
|
|
}
|
|
var standardGlyphName = recoverGlyphName(glyphName, glyphsUnicodeMap);
|
|
if (standardGlyphName !== glyphName) {
|
|
glyphId = glyphNames.indexOf(standardGlyphName);
|
|
}
|
|
}
|
|
if (glyphId >= 0) {
|
|
charCodeToGlyphId[charCode] = glyphId;
|
|
} else {
|
|
charCodeToGlyphId[charCode] = 0; // notdef
|
|
}
|
|
}
|
|
}
|
|
return charCodeToGlyphId;
|
|
}
|
|
|
|
// Type1Font is also a CIDFontType0.
|
|
var Type1Font = (function Type1FontClosure() {
|
|
function findBlock(streamBytes, signature, startIndex) {
|
|
var streamBytesLength = streamBytes.length;
|
|
var signatureLength = signature.length;
|
|
var scanLength = streamBytesLength - signatureLength;
|
|
|
|
var i = startIndex, j, found = false;
|
|
while (i < scanLength) {
|
|
j = 0;
|
|
while (j < signatureLength && streamBytes[i + j] === signature[j]) {
|
|
j++;
|
|
}
|
|
if (j >= signatureLength) { // `signature` found, skip over whitespace.
|
|
i += j;
|
|
while (i < streamBytesLength && isSpace(streamBytes[i])) {
|
|
i++;
|
|
}
|
|
found = true;
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
return {
|
|
found: found,
|
|
length: i,
|
|
};
|
|
}
|
|
|
|
function getHeaderBlock(stream, suggestedLength) {
|
|
var EEXEC_SIGNATURE = [0x65, 0x65, 0x78, 0x65, 0x63];
|
|
|
|
var streamStartPos = stream.pos; // Save the initial stream position.
|
|
var headerBytes, headerBytesLength, block;
|
|
try {
|
|
headerBytes = stream.getBytes(suggestedLength);
|
|
headerBytesLength = headerBytes.length;
|
|
} catch (ex) {
|
|
if (ex instanceof MissingDataException) {
|
|
throw ex;
|
|
}
|
|
// Ignore errors if the `suggestedLength` is huge enough that a Uint8Array
|
|
// cannot hold the result of `getBytes`, and fallback to simply checking
|
|
// the entire stream (fixes issue3928.pdf).
|
|
}
|
|
|
|
if (headerBytesLength === suggestedLength) {
|
|
// Most of the time `suggestedLength` is correct, so to speed things up we
|
|
// initially only check the last few bytes to see if the header was found.
|
|
// Otherwise we (potentially) check the entire stream to prevent errors in
|
|
// `Type1Parser` (fixes issue5686.pdf).
|
|
block = findBlock(headerBytes, EEXEC_SIGNATURE,
|
|
suggestedLength - 2 * EEXEC_SIGNATURE.length);
|
|
|
|
if (block.found && block.length === suggestedLength) {
|
|
return {
|
|
stream: new Stream(headerBytes),
|
|
length: suggestedLength,
|
|
};
|
|
}
|
|
}
|
|
warn('Invalid "Length1" property in Type1 font -- trying to recover.');
|
|
stream.pos = streamStartPos; // Reset the stream position.
|
|
|
|
var SCAN_BLOCK_LENGTH = 2048;
|
|
var actualLength;
|
|
while (true) {
|
|
var scanBytes = stream.peekBytes(SCAN_BLOCK_LENGTH);
|
|
block = findBlock(scanBytes, EEXEC_SIGNATURE, 0);
|
|
|
|
if (block.length === 0) {
|
|
break;
|
|
}
|
|
stream.pos += block.length; // Update the stream position.
|
|
|
|
if (block.found) {
|
|
actualLength = stream.pos - streamStartPos;
|
|
break;
|
|
}
|
|
}
|
|
stream.pos = streamStartPos; // Reset the stream position.
|
|
|
|
if (actualLength) {
|
|
return {
|
|
stream: new Stream(stream.getBytes(actualLength)),
|
|
length: actualLength,
|
|
};
|
|
}
|
|
warn('Unable to recover "Length1" property in Type1 font -- using as is.');
|
|
return {
|
|
stream: new Stream(stream.getBytes(suggestedLength)),
|
|
length: suggestedLength,
|
|
};
|
|
}
|
|
|
|
function getEexecBlock(stream, suggestedLength) {
|
|
// We should ideally parse the eexec block to ensure that `suggestedLength`
|
|
// is correct, so we don't truncate the block data if it's too small.
|
|
// However, this would also require checking if the fixed-content portion
|
|
// exists (using the 'Length3' property), and ensuring that it's valid.
|
|
//
|
|
// Given that `suggestedLength` almost always is correct, all the validation
|
|
// would require a great deal of unnecessary parsing for most fonts.
|
|
// To save time, we always fetch the entire stream instead, which also avoid
|
|
// issues if `suggestedLength` is huge (see comment in `getHeaderBlock`).
|
|
//
|
|
// NOTE: This means that the function can include the fixed-content portion
|
|
// in the returned eexec block. In practice this does *not* seem to matter,
|
|
// since `Type1Parser_extractFontProgram` will skip over any non-commands.
|
|
var eexecBytes = stream.getBytes();
|
|
return {
|
|
stream: new Stream(eexecBytes),
|
|
length: eexecBytes.length,
|
|
};
|
|
}
|
|
|
|
function Type1Font(name, file, properties) {
|
|
// Some bad generators embed pfb file as is, we have to strip 6-byte header.
|
|
// Also, length1 and length2 might be off by 6 bytes as well.
|
|
// http://www.math.ubc.ca/~cass/piscript/type1.pdf
|
|
var PFB_HEADER_SIZE = 6;
|
|
var headerBlockLength = properties.length1;
|
|
var eexecBlockLength = properties.length2;
|
|
var pfbHeader = file.peekBytes(PFB_HEADER_SIZE);
|
|
var pfbHeaderPresent = pfbHeader[0] === 0x80 && pfbHeader[1] === 0x01;
|
|
if (pfbHeaderPresent) {
|
|
file.skip(PFB_HEADER_SIZE);
|
|
headerBlockLength = (pfbHeader[5] << 24) | (pfbHeader[4] << 16) |
|
|
(pfbHeader[3] << 8) | pfbHeader[2];
|
|
}
|
|
|
|
// Get the data block containing glyphs and subrs information
|
|
var headerBlock = getHeaderBlock(file, headerBlockLength);
|
|
headerBlockLength = headerBlock.length;
|
|
var headerBlockParser = new Type1Parser(headerBlock.stream, false,
|
|
SEAC_ANALYSIS_ENABLED);
|
|
headerBlockParser.extractFontHeader(properties);
|
|
|
|
if (pfbHeaderPresent) {
|
|
pfbHeader = file.getBytes(PFB_HEADER_SIZE);
|
|
eexecBlockLength = (pfbHeader[5] << 24) | (pfbHeader[4] << 16) |
|
|
(pfbHeader[3] << 8) | pfbHeader[2];
|
|
}
|
|
|
|
// Decrypt the data blocks and retrieve it's content
|
|
var eexecBlock = getEexecBlock(file, eexecBlockLength);
|
|
eexecBlockLength = eexecBlock.length;
|
|
var eexecBlockParser = new Type1Parser(eexecBlock.stream, true,
|
|
SEAC_ANALYSIS_ENABLED);
|
|
var data = eexecBlockParser.extractFontProgram();
|
|
for (var info in data.properties) {
|
|
properties[info] = data.properties[info];
|
|
}
|
|
|
|
var charstrings = data.charstrings;
|
|
var type2Charstrings = this.getType2Charstrings(charstrings);
|
|
var subrs = this.getType2Subrs(data.subrs);
|
|
|
|
this.charstrings = charstrings;
|
|
this.data = this.wrap(name, type2Charstrings, this.charstrings,
|
|
subrs, properties);
|
|
this.seacs = this.getSeacs(data.charstrings);
|
|
}
|
|
|
|
Type1Font.prototype = {
|
|
get numGlyphs() {
|
|
return this.charstrings.length + 1;
|
|
},
|
|
|
|
getCharset: function Type1Font_getCharset() {
|
|
var charset = ['.notdef'];
|
|
var charstrings = this.charstrings;
|
|
for (var glyphId = 0; glyphId < charstrings.length; glyphId++) {
|
|
charset.push(charstrings[glyphId].glyphName);
|
|
}
|
|
return charset;
|
|
},
|
|
|
|
getGlyphMapping: function Type1Font_getGlyphMapping(properties) {
|
|
var charstrings = this.charstrings;
|
|
var glyphNames = ['.notdef'], glyphId;
|
|
for (glyphId = 0; glyphId < charstrings.length; glyphId++) {
|
|
glyphNames.push(charstrings[glyphId].glyphName);
|
|
}
|
|
var encoding = properties.builtInEncoding;
|
|
if (encoding) {
|
|
var builtInEncoding = Object.create(null);
|
|
for (var charCode in encoding) {
|
|
glyphId = glyphNames.indexOf(encoding[charCode]);
|
|
if (glyphId >= 0) {
|
|
builtInEncoding[charCode] = glyphId;
|
|
}
|
|
}
|
|
}
|
|
|
|
return type1FontGlyphMapping(properties, builtInEncoding, glyphNames);
|
|
},
|
|
|
|
getSeacs: function Type1Font_getSeacs(charstrings) {
|
|
var i, ii;
|
|
var seacMap = [];
|
|
for (i = 0, ii = charstrings.length; i < ii; i++) {
|
|
var charstring = charstrings[i];
|
|
if (charstring.seac) {
|
|
// Offset by 1 for .notdef
|
|
seacMap[i + 1] = charstring.seac;
|
|
}
|
|
}
|
|
return seacMap;
|
|
},
|
|
|
|
getType2Charstrings: function Type1Font_getType2Charstrings(
|
|
type1Charstrings) {
|
|
var type2Charstrings = [];
|
|
for (var i = 0, ii = type1Charstrings.length; i < ii; i++) {
|
|
type2Charstrings.push(type1Charstrings[i].charstring);
|
|
}
|
|
return type2Charstrings;
|
|
},
|
|
|
|
getType2Subrs: function Type1Font_getType2Subrs(type1Subrs) {
|
|
var bias = 0;
|
|
var count = type1Subrs.length;
|
|
if (count < 1133) {
|
|
bias = 107;
|
|
} else if (count < 33769) {
|
|
bias = 1131;
|
|
} else {
|
|
bias = 32768;
|
|
}
|
|
|
|
// Add a bunch of empty subrs to deal with the Type2 bias
|
|
var type2Subrs = [];
|
|
var i;
|
|
for (i = 0; i < bias; i++) {
|
|
type2Subrs.push([0x0B]);
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
type2Subrs.push(type1Subrs[i]);
|
|
}
|
|
|
|
return type2Subrs;
|
|
},
|
|
|
|
wrap: function Type1Font_wrap(name, glyphs, charstrings, subrs,
|
|
properties) {
|
|
var cff = new CFF();
|
|
cff.header = new CFFHeader(1, 0, 4, 4);
|
|
|
|
cff.names = [name];
|
|
|
|
var topDict = new CFFTopDict();
|
|
// CFF strings IDs 0...390 are predefined names, so refering
|
|
// to entries in our own String INDEX starts at SID 391.
|
|
topDict.setByName('version', 391);
|
|
topDict.setByName('Notice', 392);
|
|
topDict.setByName('FullName', 393);
|
|
topDict.setByName('FamilyName', 394);
|
|
topDict.setByName('Weight', 395);
|
|
topDict.setByName('Encoding', null); // placeholder
|
|
topDict.setByName('FontMatrix', properties.fontMatrix);
|
|
topDict.setByName('FontBBox', properties.bbox);
|
|
topDict.setByName('charset', null); // placeholder
|
|
topDict.setByName('CharStrings', null); // placeholder
|
|
topDict.setByName('Private', null); // placeholder
|
|
cff.topDict = topDict;
|
|
|
|
var strings = new CFFStrings();
|
|
strings.add('Version 0.11'); // Version
|
|
strings.add('See original notice'); // Notice
|
|
strings.add(name); // FullName
|
|
strings.add(name); // FamilyName
|
|
strings.add('Medium'); // Weight
|
|
cff.strings = strings;
|
|
|
|
cff.globalSubrIndex = new CFFIndex();
|
|
|
|
var count = glyphs.length;
|
|
var charsetArray = [0];
|
|
var i, ii;
|
|
for (i = 0; i < count; i++) {
|
|
var index = CFFStandardStrings.indexOf(charstrings[i].glyphName);
|
|
// TODO: Insert the string and correctly map it. Previously it was
|
|
// thought mapping names that aren't in the standard strings to .notdef
|
|
// was fine, however in issue818 when mapping them all to .notdef the
|
|
// adieresis glyph no longer worked.
|
|
if (index === -1) {
|
|
index = 0;
|
|
}
|
|
charsetArray.push((index >> 8) & 0xff, index & 0xff);
|
|
}
|
|
cff.charset = new CFFCharset(false, 0, [], charsetArray);
|
|
|
|
var charStringsIndex = new CFFIndex();
|
|
charStringsIndex.add([0x8B, 0x0E]); // .notdef
|
|
for (i = 0; i < count; i++) {
|
|
var glyph = glyphs[i];
|
|
// If the CharString outline is empty, replace it with .notdef to
|
|
// prevent OTS from rejecting the font (fixes bug1252420.pdf).
|
|
if (glyph.length === 0) {
|
|
charStringsIndex.add([0x8B, 0x0E]); // .notdef
|
|
continue;
|
|
}
|
|
charStringsIndex.add(glyph);
|
|
}
|
|
cff.charStrings = charStringsIndex;
|
|
|
|
var privateDict = new CFFPrivateDict();
|
|
privateDict.setByName('Subrs', null); // placeholder
|
|
var fields = [
|
|
'BlueValues',
|
|
'OtherBlues',
|
|
'FamilyBlues',
|
|
'FamilyOtherBlues',
|
|
'StemSnapH',
|
|
'StemSnapV',
|
|
'BlueShift',
|
|
'BlueFuzz',
|
|
'BlueScale',
|
|
'LanguageGroup',
|
|
'ExpansionFactor',
|
|
'ForceBold',
|
|
'StdHW',
|
|
'StdVW'
|
|
];
|
|
for (i = 0, ii = fields.length; i < ii; i++) {
|
|
var field = fields[i];
|
|
if (!(field in properties.privateData)) {
|
|
continue;
|
|
}
|
|
var value = properties.privateData[field];
|
|
if (isArray(value)) {
|
|
// All of the private dictionary array data in CFF must be stored as
|
|
// "delta-encoded" numbers.
|
|
for (var j = value.length - 1; j > 0; j--) {
|
|
value[j] -= value[j - 1]; // ... difference from previous value
|
|
}
|
|
}
|
|
privateDict.setByName(field, value);
|
|
}
|
|
cff.topDict.privateDict = privateDict;
|
|
|
|
var subrIndex = new CFFIndex();
|
|
for (i = 0, ii = subrs.length; i < ii; i++) {
|
|
subrIndex.add(subrs[i]);
|
|
}
|
|
privateDict.subrsIndex = subrIndex;
|
|
|
|
var compiler = new CFFCompiler(cff);
|
|
return compiler.compile();
|
|
}
|
|
};
|
|
|
|
return Type1Font;
|
|
})();
|
|
|
|
var CFFFont = (function CFFFontClosure() {
|
|
function CFFFont(file, properties) {
|
|
this.properties = properties;
|
|
|
|
var parser = new CFFParser(file, properties, SEAC_ANALYSIS_ENABLED);
|
|
this.cff = parser.parse();
|
|
var compiler = new CFFCompiler(this.cff);
|
|
this.seacs = this.cff.seacs;
|
|
try {
|
|
this.data = compiler.compile();
|
|
} catch (e) {
|
|
warn('Failed to compile font ' + properties.loadedName);
|
|
// There may have just been an issue with the compiler, set the data
|
|
// anyway and hope the font loaded.
|
|
this.data = file;
|
|
}
|
|
}
|
|
|
|
CFFFont.prototype = {
|
|
get numGlyphs() {
|
|
return this.cff.charStrings.count;
|
|
},
|
|
getCharset: function CFFFont_getCharset() {
|
|
return this.cff.charset.charset;
|
|
},
|
|
getGlyphMapping: function CFFFont_getGlyphMapping() {
|
|
var cff = this.cff;
|
|
var properties = this.properties;
|
|
var charsets = cff.charset.charset;
|
|
var charCodeToGlyphId;
|
|
var glyphId;
|
|
|
|
if (properties.composite) {
|
|
charCodeToGlyphId = Object.create(null);
|
|
if (cff.isCIDFont) {
|
|
// If the font is actually a CID font then we should use the charset
|
|
// to map CIDs to GIDs.
|
|
for (glyphId = 0; glyphId < charsets.length; glyphId++) {
|
|
var cid = charsets[glyphId];
|
|
var charCode = properties.cMap.charCodeOf(cid);
|
|
charCodeToGlyphId[charCode] = glyphId;
|
|
}
|
|
} else {
|
|
// If it is NOT actually a CID font then CIDs should be mapped
|
|
// directly to GIDs.
|
|
for (glyphId = 0; glyphId < cff.charStrings.count; glyphId++) {
|
|
charCodeToGlyphId[glyphId] = glyphId;
|
|
}
|
|
}
|
|
return charCodeToGlyphId;
|
|
}
|
|
|
|
var encoding = cff.encoding ? cff.encoding.encoding : null;
|
|
charCodeToGlyphId = type1FontGlyphMapping(properties, encoding, charsets);
|
|
return charCodeToGlyphId;
|
|
}
|
|
};
|
|
|
|
return CFFFont;
|
|
})();
|
|
|
|
// Workaround for seac on Windows.
|
|
(function checkSeacSupport() {
|
|
if (typeof navigator !== 'undefined' && /Windows/.test(navigator.userAgent)) {
|
|
SEAC_ANALYSIS_ENABLED = true;
|
|
}
|
|
})();
|
|
|
|
// Workaround for Private Use Area characters in Chrome on Windows
|
|
// http://code.google.com/p/chromium/issues/detail?id=122465
|
|
// https://github.com/mozilla/pdf.js/issues/1689
|
|
(function checkChromeWindows() {
|
|
if (typeof navigator !== 'undefined' &&
|
|
/Windows.*Chrome/.test(navigator.userAgent)) {
|
|
SKIP_PRIVATE_USE_RANGE_F000_TO_F01F = true;
|
|
}
|
|
})();
|
|
|
|
exports.ErrorFont = ErrorFont;
|
|
exports.Font = Font;
|
|
exports.FontFlags = FontFlags;
|
|
exports.IdentityToUnicodeMap = IdentityToUnicodeMap;
|
|
exports.ToUnicodeMap = ToUnicodeMap;
|
|
exports.getFontType = getFontType;
|
|
}));
|