1847 lines
64 KiB
JavaScript
1847 lines
64 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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"use strict";
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var isWorker = (typeof window == "undefined");
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/**
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* Maximum file size of the font.
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*/
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var kMaxFontFileSize = 40000;
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/**
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* Maximum time to wait for a font to be loaded by @font-face
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*/
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var kMaxWaitForFontFace = 1000;
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/**
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* Useful for debugging when you want to certains operations depending on how
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* many fonts are loaded.
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*/
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var fontCount = 0;
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var fontName = "";
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/**
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* If for some reason one want to debug without fonts activated, it just need
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* to turn this pref to true/false.
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*/
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var kDisableFonts = false;
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/**
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* Hold a map of decoded fonts and of the standard fourteen Type1 fonts and
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* their acronyms.
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* TODO Add the standard fourteen Type1 fonts list by default
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* http://cgit.freedesktop.org/poppler/poppler/tree/poppler/GfxFont.cc#n65
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*/
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var Fonts = (function Fonts() {
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var kScalePrecision = 40;
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var fonts = Object.create(null);
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if (!isWorker) {
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var ctx = document.createElement("canvas").getContext("2d");
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ctx.scale(1 / kScalePrecision, 1);
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}
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function Font(name, data, properties) {
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this.name = name;
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this.data = data;
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this.properties = properties;
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this.loading = true;
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this.charsCache = Object.create(null);
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this.sizes = [];
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}
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var current;
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var charsCache;
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var measureCache;
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return {
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registerFont: function fonts_registerFont(fontName, data, properties) {
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fonts[fontName] = new Font(fontName, data, properties);
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},
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blacklistFont: function fonts_blacklistFont(fontName) {
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registerFont(fontName, null, {});
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markLoaded(fontName);
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},
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lookup: function fonts_lookup(fontName) {
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return fonts[fontName];
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},
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setActive: function fonts_setActive(fontName, size) {
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// |current| can be null is fontName is a built-in font
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// (e.g. "sans-serif")
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if ((current = fonts[fontName])) {
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charsCache = current.charsCache;
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var sizes = current.sizes;
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if (!(measureCache = sizes[size]))
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measureCache = sizes[size] = Object.create(null);
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}
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ctx.font = (size * kScalePrecision) + 'px "' + fontName + '"';
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},
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charsToUnicode: function fonts_chars2Unicode(chars) {
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if (!charsCache)
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return chars;
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// if we translated this string before, just grab it from the cache
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var str = charsCache[chars];
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if (str)
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return str;
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// translate the string using the font's encoding
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var encoding = current ? current.properties.encoding : null;
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if (!encoding)
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return chars;
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str = "";
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for (var i = 0; i < chars.length; ++i) {
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var charcode = chars.charCodeAt(i);
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var unicode = encoding[charcode];
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// Check if the glyph has already been converted
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if (!IsNum(unicode))
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unicode = encoding[unicode] = GlyphsUnicode[unicode.name];
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// Handle surrogate pairs
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if (unicode > 0xFFFF) {
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str += String.fromCharCode(unicode & 0xFFFF);
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unicode >>= 16;
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}
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str += String.fromCharCode(unicode);
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}
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// Enter the translated string into the cache
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return charsCache[chars] = str;
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},
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measureText: function fonts_measureText(text) {
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var width;
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if (measureCache && (width = measureCache[text]))
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return width;
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width = ctx.measureText(text).width / kScalePrecision;
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if (measureCache)
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measureCache[text] = width;
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return width;
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}
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}
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})();
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var FontLoader = {
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listeningForFontLoad: false,
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bind: function(fonts, callback) {
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function checkFontsLoaded() {
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for (var i = 0; i < fonts.length; i++) {
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var font = fonts[i];
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if (Fonts.lookup(font.name).loading) {
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return false;
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}
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}
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document.documentElement.removeEventListener(
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"pdfjsFontLoad", checkFontsLoaded, false);
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callback();
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return true;
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}
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var rules = [ ], names = [ ];
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for (var i = 0; i < fonts.length; i++) {
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var font = fonts[i];
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if (!Fonts.lookup(font.name)) {
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var obj = new Font(font.name, font.file, font.properties);
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var str = "";
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var data = Fonts.lookup(font.name).data;
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var length = data.length;
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for (var j = 0; j < length; j++)
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str += String.fromCharCode(data[j]);
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var rule = isWorker ? obj.bindWorker(str) : obj.bindDOM(str);
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if (rule) {
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rules.push(rule);
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names.push(font.name);
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}
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}
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}
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if (!isWorker && rules.length) {
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FontLoader.prepareFontLoadEvent(rules, names);
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}
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if (!checkFontsLoaded()) {
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document.documentElement.addEventListener(
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"pdfjsFontLoad", checkFontsLoaded, false);
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}
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return;
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},
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// Set things up so that at least one pdfjsFontLoad event is
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// dispatched when all the @font-face |rules| for |names| have been
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// loaded in a subdocument. It's expected that the load of |rules|
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// has already started in this (outer) document, so that they should
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// be ordered before the load in the subdocument.
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prepareFontLoadEvent: function(rules, names) {
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/** Hack begin */
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// There's no event when a font has finished downloading so the
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// following code is a dirty hack to 'guess' when a font is
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// ready. This code will be obsoleted by Mozilla bug 471915.
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//
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// The only reliable way to know if a font is loaded in Gecko
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// (at the moment) is document.onload in a document with
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// a @font-face rule defined in a "static" stylesheet. We use a
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// subdocument in an <iframe>, set up properly, to know when
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// our @font-face rule was loaded. However, the subdocument and
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// outer document can't share CSS rules, so the inner document
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// is only part of the puzzle. The second piece is an invisible
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// div created in order to force loading of the @font-face in
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// the *outer* document. (The font still needs to be loaded for
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// its metrics, for reflow). We create the div first for the
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// outer document, then create the iframe. Unless something
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// goes really wonkily, we expect the @font-face for the outer
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// document to be processed before the inner. That's still
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// fragile, but seems to work in practice.
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//
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// The postMessage() hackery was added to work around chrome bug
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// 82402.
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var div = document.createElement("div");
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div.setAttribute("style",
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'visibility: hidden;'+
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'width: 10px; height: 10px;'+
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'position: absolute; top: 0px; left: 0px;');
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var html = '';
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for (var i = 0; i < names.length; ++i) {
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html += '<span style="font-family:'+ names[i] +'">Hi</span>';
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}
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div.innerHTML = html;
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document.body.appendChild(div);
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if (!this.listeneningForFontLoad) {
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window.addEventListener(
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"message",
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function(e) {
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var fontNames = JSON.parse(e.data);
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for (var i = 0; i < fontNames.length; ++i) {
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var font = Fonts.lookup(fontNames[i]);
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font.loading = false;
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}
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var evt = document.createEvent("Events");
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evt.initEvent("pdfjsFontLoad", true, false);
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document.documentElement.dispatchEvent(evt);
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},
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false);
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this.listeneningForFontLoad = true;
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}
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// XXX we should have a time-out here too, and maybe fire
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// pdfjsFontLoadFailed?
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var src = '<!DOCTYPE HTML><html><head>';
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src += '<style type="text/css">';
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for (var i = 0; i < rules.length; ++i) {
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src += rules[i];
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}
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src += '</style>'
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src += '<script type="application/javascript">'
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var fontNamesArray = '';
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for (var i = 0; i < names.length; ++i) {
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fontNamesArray += '"'+ names[i] + '", ';
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}
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src += ' var fontNames=['+ fontNamesArray +'];\n';
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src += ' window.onload = function () {\n'
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src += ' top.postMessage(JSON.stringify(fontNames), "*");\n';
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src += ' }';
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src += '</script></head><body>';
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for (var i = 0; i < names.length; ++i) {
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src += '<p style="font-family:\''+ fontName +'\'">Hi</p>';
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}
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src += '</body></html>';
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var frame = document.createElement("iframe");
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frame.src = 'data:text/html,'+ src;
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frame.setAttribute("style",
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'visibility: hidden;'+
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'width: 10px; height: 10px;'+
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'position: absolute; top: 0px; left: 0px;');
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document.body.appendChild(frame);
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/** Hack end */
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}
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};
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var UnicodeRanges = [
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{ "begin": 0x0000, "end": 0x007F }, // Basic Latin
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{ "begin": 0x0080, "end": 0x00FF }, // Latin-1 Supplement
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{ "begin": 0x0100, "end": 0x017F }, // Latin Extended-A
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{ "begin": 0x0180, "end": 0x024F }, // Latin Extended-B
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{ "begin": 0x0250, "end": 0x02AF }, // IPA Extensions
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{ "begin": 0x02B0, "end": 0x02FF }, // Spacing Modifier Letters
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{ "begin": 0x0300, "end": 0x036F }, // Combining Diacritical Marks
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{ "begin": 0x0370, "end": 0x03FF }, // Greek and Coptic
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{ "begin": 0x2C80, "end": 0x2CFF }, // Coptic
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{ "begin": 0x0400, "end": 0x04FF }, // Cyrillic
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{ "begin": 0x0530, "end": 0x058F }, // Armenian
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{ "begin": 0x0590, "end": 0x05FF }, // Hebrew
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{ "begin": 0xA500, "end": 0xA63F }, // Vai
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{ "begin": 0x0600, "end": 0x06FF }, // Arabic
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{ "begin": 0x07C0, "end": 0x07FF }, // NKo
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{ "begin": 0x0900, "end": 0x097F }, // Devanagari
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{ "begin": 0x0980, "end": 0x09FF }, // Bengali
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{ "begin": 0x0A00, "end": 0x0A7F }, // Gurmukhi
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{ "begin": 0x0A80, "end": 0x0AFF }, // Gujarati
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{ "begin": 0x0B00, "end": 0x0B7F }, // Oriya
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{ "begin": 0x0B80, "end": 0x0BFF }, // Tamil
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{ "begin": 0x0C00, "end": 0x0C7F }, // Telugu
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{ "begin": 0x0C80, "end": 0x0CFF }, // Kannada
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{ "begin": 0x0D00, "end": 0x0D7F }, // Malayalam
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{ "begin": 0x0E00, "end": 0x0E7F }, // Thai
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{ "begin": 0x0E80, "end": 0x0EFF }, // Lao
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{ "begin": 0x10A0, "end": 0x10FF }, // Georgian
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{ "begin": 0x1B00, "end": 0x1B7F }, // Balinese
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{ "begin": 0x1100, "end": 0x11FF }, // Hangul Jamo
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{ "begin": 0x1E00, "end": 0x1EFF }, // Latin Extended Additional
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{ "begin": 0x1F00, "end": 0x1FFF }, // Greek Extended
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{ "begin": 0x2000, "end": 0x206F }, // General Punctuation
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{ "begin": 0x2070, "end": 0x209F }, // Superscripts And Subscripts
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{ "begin": 0x20A0, "end": 0x20CF }, // Currency Symbol
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{ "begin": 0x20D0, "end": 0x20FF }, // Combining Diacritical Marks For Symbols
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{ "begin": 0x2100, "end": 0x214F }, // Letterlike Symbols
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{ "begin": 0x2150, "end": 0x218F }, // Number Forms
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{ "begin": 0x2190, "end": 0x21FF }, // Arrows
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{ "begin": 0x2200, "end": 0x22FF }, // Mathematical Operators
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{ "begin": 0x2300, "end": 0x23FF }, // Miscellaneous Technical
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{ "begin": 0x2400, "end": 0x243F }, // Control Pictures
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{ "begin": 0x2440, "end": 0x245F }, // Optical Character Recognition
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{ "begin": 0x2460, "end": 0x24FF }, // Enclosed Alphanumerics
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{ "begin": 0x2500, "end": 0x257F }, // Box Drawing
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{ "begin": 0x2580, "end": 0x259F }, // Block Elements
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{ "begin": 0x25A0, "end": 0x25FF }, // Geometric Shapes
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{ "begin": 0x2600, "end": 0x26FF }, // Miscellaneous Symbols
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{ "begin": 0x2700, "end": 0x27BF }, // Dingbats
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{ "begin": 0x3000, "end": 0x303F }, // CJK Symbols And Punctuation
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{ "begin": 0x3040, "end": 0x309F }, // Hiragana
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{ "begin": 0x30A0, "end": 0x30FF }, // Katakana
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{ "begin": 0x3100, "end": 0x312F }, // Bopomofo
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{ "begin": 0x3130, "end": 0x318F }, // Hangul Compatibility Jamo
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{ "begin": 0xA840, "end": 0xA87F }, // Phags-pa
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{ "begin": 0x3200, "end": 0x32FF }, // Enclosed CJK Letters And Months
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{ "begin": 0x3300, "end": 0x33FF }, // CJK Compatibility
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{ "begin": 0xAC00, "end": 0xD7AF }, // Hangul Syllables
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{ "begin": 0xD800, "end": 0xDFFF }, // Non-Plane 0 *
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{ "begin": 0x10900, "end": 0x1091F }, // Phoenicia
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{ "begin": 0x4E00, "end": 0x9FFF }, // CJK Unified Ideographs
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{ "begin": 0xE000, "end": 0xF8FF }, // Private Use Area (plane 0)
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{ "begin": 0x31C0, "end": 0x31EF }, // CJK Strokes
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{ "begin": 0xFB00, "end": 0xFB4F }, // Alphabetic Presentation Forms
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{ "begin": 0xFB50, "end": 0xFDFF }, // Arabic Presentation Forms-A
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{ "begin": 0xFE20, "end": 0xFE2F }, // Combining Half Marks
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{ "begin": 0xFE10, "end": 0xFE1F }, // Vertical Forms
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{ "begin": 0xFE50, "end": 0xFE6F }, // Small Form Variants
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{ "begin": 0xFE70, "end": 0xFEFF }, // Arabic Presentation Forms-B
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{ "begin": 0xFF00, "end": 0xFFEF }, // Halfwidth And Fullwidth Forms
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{ "begin": 0xFFF0, "end": 0xFFFF }, // Specials
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{ "begin": 0x0F00, "end": 0x0FFF }, // Tibetan
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{ "begin": 0x0700, "end": 0x074F }, // Syriac
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{ "begin": 0x0780, "end": 0x07BF }, // Thaana
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{ "begin": 0x0D80, "end": 0x0DFF }, // Sinhala
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{ "begin": 0x1000, "end": 0x109F }, // Myanmar
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{ "begin": 0x1200, "end": 0x137F }, // Ethiopic
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{ "begin": 0x13A0, "end": 0x13FF }, // Cherokee
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{ "begin": 0x1400, "end": 0x167F }, // Unified Canadian Aboriginal Syllabics
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{ "begin": 0x1680, "end": 0x169F }, // Ogham
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{ "begin": 0x16A0, "end": 0x16FF }, // Runic
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{ "begin": 0x1780, "end": 0x17FF }, // Khmer
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{ "begin": 0x1800, "end": 0x18AF }, // Mongolian
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{ "begin": 0x2800, "end": 0x28FF }, // Braille Patterns
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{ "begin": 0xA000, "end": 0xA48F }, // Yi Syllables
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{ "begin": 0x1700, "end": 0x171F }, // Tagalog
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{ "begin": 0x10300, "end": 0x1032F }, // Old Italic
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{ "begin": 0x10330, "end": 0x1034F }, // Gothic
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{ "begin": 0x10400, "end": 0x1044F }, // Deseret
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{ "begin": 0x1D000, "end": 0x1D0FF }, // Byzantine Musical Symbols
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{ "begin": 0x1D400, "end": 0x1D7FF }, // Mathematical Alphanumeric Symbols
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{ "begin": 0xFF000, "end": 0xFFFFD }, // Private Use (plane 15)
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{ "begin": 0xFE00, "end": 0xFE0F }, // Variation Selectors
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{ "begin": 0xE0000, "end": 0xE007F }, // Tags
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{ "begin": 0x1900, "end": 0x194F }, // Limbu
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{ "begin": 0x1950, "end": 0x197F }, // Tai Le
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{ "begin": 0x1980, "end": 0x19DF }, // New Tai Lue
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{ "begin": 0x1A00, "end": 0x1A1F }, // Buginese
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{ "begin": 0x2C00, "end": 0x2C5F }, // Glagolitic
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{ "begin": 0x2D30, "end": 0x2D7F }, // Tifinagh
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{ "begin": 0x4DC0, "end": 0x4DFF }, // Yijing Hexagram Symbols
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{ "begin": 0xA800, "end": 0xA82F }, // Syloti Nagri
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{ "begin": 0x10000, "end": 0x1007F }, // Linear B Syllabary
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{ "begin": 0x10140, "end": 0x1018F }, // Ancient Greek Numbers
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{ "begin": 0x10380, "end": 0x1039F }, // Ugaritic
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{ "begin": 0x103A0, "end": 0x103DF }, // Old Persian
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{ "begin": 0x10450, "end": 0x1047F }, // Shavian
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{ "begin": 0x10480, "end": 0x104AF }, // Osmanya
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{ "begin": 0x10800, "end": 0x1083F }, // Cypriot Syllabary
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{ "begin": 0x10A00, "end": 0x10A5F }, // Kharoshthi
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|
{ "begin": 0x1D300, "end": 0x1D35F }, // Tai Xuan Jing Symbols
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{ "begin": 0x12000, "end": 0x123FF }, // Cuneiform
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|
{ "begin": 0x1D360, "end": 0x1D37F }, // Counting Rod Numerals
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{ "begin": 0x1B80, "end": 0x1BBF }, // Sundanese
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{ "begin": 0x1C00, "end": 0x1C4F }, // Lepcha
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{ "begin": 0x1C50, "end": 0x1C7F }, // Ol Chiki
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{ "begin": 0xA880, "end": 0xA8DF }, // Saurashtra
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{ "begin": 0xA900, "end": 0xA92F }, // Kayah Li
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{ "begin": 0xA930, "end": 0xA95F }, // Rejang
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{ "begin": 0xAA00, "end": 0xAA5F }, // Cham
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{ "begin": 0x10190, "end": 0x101CF }, // Ancient Symbols
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{ "begin": 0x101D0, "end": 0x101FF }, // Phaistos Disc
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{ "begin": 0x102A0, "end": 0x102DF }, // Carian
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{ "begin": 0x1F030, "end": 0x1F09F } // Domino Tiles
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];
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function getUnicodeRangeFor(value) {
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for (var i = 0; i < UnicodeRanges.length; i++) {
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var range = UnicodeRanges[i];
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if (value >= range.begin && value < range.end)
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return i;
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}
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return -1;
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};
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/**
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* '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).
|
|
*
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|
* For example to read a Type1 font and to attach it to the document:
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|
* var type1Font = new Font("MyFontName", binaryFile, propertiesObject);
|
|
* type1Font.bind();
|
|
*/
|
|
var Font = (function () {
|
|
var constructor = function font_constructor(name, file, properties) {
|
|
this.name = name;
|
|
this.encoding = properties.encoding;
|
|
|
|
// If the font has already been decoded simply return it
|
|
if (Fonts.lookup(name)) {
|
|
this.font = Fonts.lookup(name).data;
|
|
return;
|
|
}
|
|
fontCount++;
|
|
fontName = name;
|
|
|
|
// If the font is to be ignored, register it like an already loaded font
|
|
// to avoid the cost of waiting for it be be loaded by the platform.
|
|
if (properties.ignore || kDisableFonts) {
|
|
Fonts.blacklistFont(name);
|
|
return;
|
|
}
|
|
|
|
var data;
|
|
switch (properties.type) {
|
|
case "Type1":
|
|
var cff = new CFF(name, file, properties);
|
|
this.mimetype = "font/opentype";
|
|
|
|
// Wrap the CFF data inside an OTF font file
|
|
data = this.convert(name, cff, properties);
|
|
break;
|
|
|
|
case "TrueType":
|
|
this.mimetype = "font/opentype";
|
|
|
|
// Repair the TrueType file if it is can be damaged in the point of
|
|
// view of the sanitizer
|
|
data = this.checkAndRepair(name, file, properties);
|
|
break;
|
|
|
|
default:
|
|
warn("Font " + properties.type + " is not supported");
|
|
break;
|
|
}
|
|
this.data = data;
|
|
Fonts.registerFont(name, data, properties);
|
|
};
|
|
|
|
function stringToArray(str) {
|
|
var array = [];
|
|
for (var i = 0; i < str.length; ++i)
|
|
array[i] = str.charCodeAt(i);
|
|
|
|
return array;
|
|
};
|
|
|
|
function int16(bytes) {
|
|
return (bytes[0] << 8) + (bytes[1] & 0xff);
|
|
};
|
|
|
|
function int32(bytes) {
|
|
return (bytes[0] << 24) + (bytes[1] << 16) +
|
|
(bytes[2] << 8) + (bytes[3] & 0xff);
|
|
};
|
|
|
|
function getMaxPower2(number) {
|
|
var maxPower = 0;
|
|
var value = number;
|
|
while (value >= 2) {
|
|
value /= 2;
|
|
maxPower++;
|
|
}
|
|
|
|
value = 2;
|
|
for (var i = 1; i < maxPower; i++)
|
|
value *= 2;
|
|
return value;
|
|
};
|
|
|
|
function string16(value) {
|
|
return String.fromCharCode((value >> 8) & 0xff) +
|
|
String.fromCharCode(value & 0xff);
|
|
};
|
|
|
|
function string32(value) {
|
|
return String.fromCharCode((value >> 24) & 0xff) +
|
|
String.fromCharCode((value >> 16) & 0xff) +
|
|
String.fromCharCode((value >> 8) & 0xff) +
|
|
String.fromCharCode(value & 0xff);
|
|
};
|
|
|
|
function createOpenTypeHeader(sfnt, file, offsets, numTables) {
|
|
// sfnt version (4 bytes)
|
|
var header = sfnt;
|
|
|
|
// numTables (2 bytes)
|
|
header += string16(numTables);
|
|
|
|
// searchRange (2 bytes)
|
|
var tablesMaxPower2 = getMaxPower2(numTables);
|
|
var searchRange = tablesMaxPower2 * 16;
|
|
header += string16(searchRange);
|
|
|
|
// entrySelector (2 bytes)
|
|
header += string16(Math.log(tablesMaxPower2) / Math.log(2));
|
|
|
|
// rangeShift (2 bytes)
|
|
header += string16(numTables * 16 - searchRange);
|
|
|
|
file.set(stringToArray(header), offsets.currentOffset);
|
|
offsets.currentOffset += header.length;
|
|
offsets.virtualOffset += header.length;
|
|
};
|
|
|
|
function createTableEntry(file, offsets, tag, data) {
|
|
// offset
|
|
var offset = offsets.virtualOffset;
|
|
|
|
// length
|
|
var length = data.length;
|
|
|
|
// Per spec tables must be 4-bytes align so add padding as needed
|
|
while (data.length & 3)
|
|
data.push(0x00);
|
|
|
|
while (offsets.virtualOffset & 3)
|
|
offsets.virtualOffset++;
|
|
|
|
// checksum
|
|
var checksum = 0;
|
|
for (var i = 0; i < length; i+=4)
|
|
checksum += int16([data[i], data[i+1], data[i+2], data[i+3]]);
|
|
|
|
var tableEntry = tag + string32(checksum) + string32(offset) + string32(length);
|
|
tableEntry = stringToArray(tableEntry);
|
|
file.set(tableEntry, offsets.currentOffset);
|
|
|
|
offsets.currentOffset += tableEntry.length;
|
|
offsets.virtualOffset += data.length;
|
|
};
|
|
|
|
function getRanges(glyphs) {
|
|
// Array.sort() sorts by characters, not numerically, so convert to an
|
|
// array of characters.
|
|
var codes = [];
|
|
var length = glyphs.length;
|
|
for (var n = 0; n < length; ++n)
|
|
codes.push(String.fromCharCode(glyphs[n].unicode))
|
|
codes.sort();
|
|
|
|
// Split the sorted codes into ranges.
|
|
var ranges = [];
|
|
for (var n = 0; n < length; ) {
|
|
var start = codes[n++].charCodeAt(0);
|
|
var end = start;
|
|
while (n < length && end + 1 == codes[n].charCodeAt(0)) {
|
|
++end;
|
|
++n;
|
|
}
|
|
ranges.push([start, end]);
|
|
}
|
|
return ranges;
|
|
};
|
|
|
|
function createCMapTable(glyphs) {
|
|
glyphs.push({ unicode: 0x0000 });
|
|
var ranges = getRanges(glyphs);
|
|
|
|
var numTables = 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 headerSize = (12 * 2 + (ranges.length * 5 * 2));
|
|
var segCount = ranges.length + 1;
|
|
var segCount2 = segCount * 2;
|
|
var searchRange = getMaxPower2(segCount) * 2;
|
|
var searchEntry = Math.log(segCount) / Math.log(2);
|
|
var rangeShift = 2 * segCount - searchRange;
|
|
|
|
var format314 = "\x00\x04" + // format
|
|
string16(headerSize) + // length
|
|
"\x00\x00" + // language
|
|
string16(segCount2) +
|
|
string16(searchRange) +
|
|
string16(searchEntry) +
|
|
string16(rangeShift);
|
|
|
|
// Fill up the 4 parallel arrays describing the segments.
|
|
var startCount = "";
|
|
var endCount = "";
|
|
var idDeltas = "";
|
|
var idRangeOffsets = "";
|
|
var glyphsIds = "";
|
|
var bias = 0;
|
|
for (var i = 0; i < segCount - 1; i++) {
|
|
var range = ranges[i];
|
|
var start = range[0];
|
|
var end = range[1];
|
|
var delta = (bias - start) % 0xffff;
|
|
bias += (end - start + 1);
|
|
|
|
startCount += string16(start);
|
|
endCount += string16(end);
|
|
idDeltas += string16(delta);
|
|
idRangeOffsets += string16(0);
|
|
|
|
for (var j = start; j <= end; j++) {
|
|
glyphsIds += string16(j);
|
|
}
|
|
}
|
|
|
|
endCount += "\xFF\xFF";
|
|
startCount += "\xFF\xFF";
|
|
idDeltas += "\x00\x01";
|
|
idRangeOffsets += "\x00\x00";
|
|
format314 += endCount + "\x00\x00" + startCount +
|
|
idDeltas + idRangeOffsets + glyphsIds;
|
|
|
|
return stringToArray(cmap + format314);
|
|
};
|
|
|
|
function createOS2Table(properties) {
|
|
var ulUnicodeRange1 = 0;
|
|
var ulUnicodeRange2 = 0;
|
|
var ulUnicodeRange3 = 0;
|
|
var ulUnicodeRange4 = 0;
|
|
|
|
var charset = properties.charset;
|
|
if (charset && charset.length) {
|
|
var firstCharIndex = null;
|
|
var lastCharIndex = 0;
|
|
|
|
for (var i = 1; i < charset.length; i++) {
|
|
var code = GlyphsUnicode[charset[i]];
|
|
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");
|
|
}
|
|
}
|
|
}
|
|
|
|
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(properties.ascent) + // sTypoAscender
|
|
string16(properties.descent) + // sTypoDescender
|
|
"\x00\x64" + // sTypoLineGap (7%-10% of the unitsPerEM value)
|
|
string16(properties.ascent) + // usWinAscent
|
|
string16(-properties.descent) + // 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
|
|
};
|
|
|
|
constructor.prototype = {
|
|
name: null,
|
|
font: null,
|
|
mimetype: null,
|
|
encoding: null,
|
|
|
|
checkAndRepair: function font_checkAndRepair(name, font, properties) {
|
|
function readTableEntry(file) {
|
|
// tag
|
|
var tag = file.getBytes(4);
|
|
tag = String.fromCharCode(tag[0]) +
|
|
String.fromCharCode(tag[1]) +
|
|
String.fromCharCode(tag[2]) +
|
|
String.fromCharCode(tag[3]);
|
|
|
|
var checksum = int32(file.getBytes(4));
|
|
var offset = int32(file.getBytes(4));
|
|
var length = int32(file.getBytes(4));
|
|
|
|
// 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;
|
|
|
|
return {
|
|
tag: tag,
|
|
checksum: checksum,
|
|
length: offset,
|
|
offset: length,
|
|
data: data
|
|
}
|
|
};
|
|
|
|
function readOpenTypeHeader(ttf) {
|
|
return {
|
|
version: ttf.getBytes(4),
|
|
numTables: int16(ttf.getBytes(2)),
|
|
searchRange: int16(ttf.getBytes(2)),
|
|
entrySelector: int16(ttf.getBytes(2)),
|
|
rangeShift: int16(ttf.getBytes(2))
|
|
}
|
|
};
|
|
|
|
function replaceCMapTable(cmap, font, properties) {
|
|
font.pos = (font.start ? font.start : 0) + cmap.length;
|
|
|
|
var version = int16(font.getBytes(2));
|
|
var numTables = int16(font.getBytes(2));
|
|
|
|
for (var i = 0; i < numTables; i++) {
|
|
var platformID = int16(font.getBytes(2));
|
|
var encodingID = int16(font.getBytes(2));
|
|
var offset = int32(font.getBytes(4));
|
|
var format = int16(font.getBytes(2));
|
|
var length = int16(font.getBytes(2));
|
|
var language = int16(font.getBytes(2));
|
|
|
|
if ((format == 0 && numTables == 1) ||
|
|
(format == 6 && numTables == 1 && !properties.encoding.empty)) {
|
|
// Format 0 alone is not allowed by the sanitizer so let's rewrite
|
|
// that to a 3-1-4 Unicode BMP table
|
|
TODO("Use an other source of informations than charset here, it is not reliable");
|
|
var charset = properties.charset;
|
|
var glyphs = [];
|
|
for (var j = 0; j < charset.length; j++) {
|
|
glyphs.push({
|
|
unicode: GlyphsUnicode[charset[j]] || 0
|
|
});
|
|
}
|
|
|
|
cmap.data = createCMapTable(glyphs);
|
|
} else if (format == 6 && numTables == 1) {
|
|
// 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 = int16(font.getBytes(2));
|
|
var entryCount = int16(font.getBytes(2));
|
|
|
|
var glyphs = [];
|
|
var min = 0xffff, max = 0;
|
|
for (var j = 0; j < entryCount; j++) {
|
|
var charcode = int16(font.getBytes(2));
|
|
glyphs.push(charcode);
|
|
|
|
if (charcode < min)
|
|
min = charcode;
|
|
if (charcode > max)
|
|
max = charcode;
|
|
}
|
|
|
|
// Since Format 6 is a dense array, check for gaps
|
|
for (var j = min; j < max; j++) {
|
|
if (glyphs.indexOf(j) == -1)
|
|
glyphs.push(j);
|
|
}
|
|
|
|
for (var j = 0; j < glyphs.length; j++)
|
|
glyphs[j] = { unicode: glyphs[j] + firstCode };
|
|
|
|
var ranges= getRanges(glyphs);
|
|
assert(ranges.length == 1, "Got " + ranges.length + " ranges in a dense array");
|
|
|
|
var encoding = properties.encoding;
|
|
var denseRange = ranges[0];
|
|
var start = denseRange[0];
|
|
var end = denseRange[1];
|
|
var index = firstCode;
|
|
for (var j = start; j <= end; j++)
|
|
encoding[index++] = glyphs[j - firstCode - 1].unicode;
|
|
cmap.data = createCMapTable(glyphs);
|
|
}
|
|
}
|
|
};
|
|
|
|
// Check that required tables are present
|
|
var requiredTables = [ "OS/2", "cmap", "head", "hhea",
|
|
"hmtx", "maxp", "name", "post" ];
|
|
|
|
var header = readOpenTypeHeader(font);
|
|
var numTables = header.numTables;
|
|
|
|
// This keep a reference to the CMap and the post tables since they can
|
|
// be rewritted
|
|
var cmap, post;
|
|
|
|
var tables = [];
|
|
for (var i = 0; i < numTables; i++) {
|
|
var table = readTableEntry(font);
|
|
var index = requiredTables.indexOf(table.tag);
|
|
if (index != -1) {
|
|
if (table.tag == "cmap")
|
|
cmap = table;
|
|
else if (table.tag == "post")
|
|
post = table;
|
|
|
|
requiredTables.splice(index, 1);
|
|
}
|
|
tables.push(table);
|
|
}
|
|
|
|
// If any tables are still in the array this means some required tables are
|
|
// missing, which means that we need to rebuild the font in order to pass
|
|
// the sanitizer.
|
|
if (requiredTables.length && requiredTables[0] == "OS/2") {
|
|
// Create a new file to hold the new version of our truetype with a new
|
|
// header and new offsets
|
|
var ttf = new Uint8Array(kMaxFontFileSize);
|
|
|
|
// The offsets object holds at the same time a representation of where
|
|
// to write the table entry information about a table and another offset
|
|
// representing the offset where to put the actual data of a particular
|
|
// table
|
|
var numTables = header.numTables + requiredTables.length;
|
|
var offsets = {
|
|
currentOffset: 0,
|
|
virtualOffset: numTables * (4 * 4)
|
|
};
|
|
|
|
// The new numbers of tables will be the last one plus the num of missing
|
|
// tables
|
|
createOpenTypeHeader("\x00\x01\x00\x00", ttf, offsets, numTables);
|
|
|
|
// Insert the missing table
|
|
tables.push({
|
|
tag: "OS/2",
|
|
data: stringToArray(createOS2Table(properties))
|
|
});
|
|
|
|
// Replace the old CMAP table with a shiny new one
|
|
replaceCMapTable(cmap, font, properties);
|
|
|
|
// Rewrite the 'post' table if needed
|
|
if (!post) {
|
|
tables.push({
|
|
tag: "post",
|
|
data: stringToArray(createPostTable(properties))
|
|
});
|
|
}
|
|
|
|
// Tables needs to be written by ascendant alphabetic order
|
|
tables.sort(function tables_sort(a, b) {
|
|
return (a.tag > b.tag) - (a.tag < b.tag);
|
|
});
|
|
|
|
// rewrite the tables but tweak offsets
|
|
for (var i = 0; i < tables.length; i++) {
|
|
var table = tables[i];
|
|
var data = [];
|
|
|
|
var tableData = table.data;
|
|
for (var j = 0; j < tableData.length; j++)
|
|
data.push(tableData[j]);
|
|
createTableEntry(ttf, offsets, table.tag, data);
|
|
}
|
|
|
|
// Add the table datas
|
|
for (var i = 0; i < tables.length; i++) {
|
|
var table = tables[i];
|
|
var tableData = table.data;
|
|
ttf.set(tableData, offsets.currentOffset);
|
|
offsets.currentOffset += tableData.length;
|
|
|
|
// 4-byte aligned data
|
|
while (offsets.currentOffset & 3)
|
|
offsets.currentOffset++;
|
|
}
|
|
|
|
var fontData = [];
|
|
for (var i = 0; i < offsets.currentOffset; i++)
|
|
fontData.push(ttf[i]);
|
|
|
|
return fontData;
|
|
} else if (requiredTables.length) {
|
|
error("Table " + requiredTables[0] + " is missing from the TrueType font");
|
|
}
|
|
|
|
return font.getBytes();
|
|
},
|
|
|
|
convert: function font_convert(fontName, font, properties) {
|
|
function createNameTable(name) {
|
|
// All the strings of the name table should be an odd number of bytes
|
|
if (name.length % 2)
|
|
name = name.slice(0, name.length - 1);
|
|
|
|
var strings = [
|
|
"Original licence", // 0.Copyright
|
|
name, // 1.Font family
|
|
"Unknown", // 2.Font subfamily (font weight)
|
|
"uniqueID", // 3.Unique ID
|
|
name, // 4.Full font name
|
|
"Version 0.11", // 5.Version
|
|
"Unknown", // 6.Postscript name
|
|
"Unknown", // 7.Trademark
|
|
"Unknown", // 8.Manufacturer
|
|
"Unknown" // 9.Designer
|
|
];
|
|
|
|
// Mac want 1-byte per character strings while Windows want
|
|
// 2-bytes per character, so duplicate the names table
|
|
var stringsUnicode = [];
|
|
for (var i = 0; i < strings.length; i++) {
|
|
var str = strings[i];
|
|
|
|
var strUnicode = "";
|
|
for (var j = 0; j < str.length; j++)
|
|
strUnicode += string16(str.charCodeAt(j));
|
|
stringsUnicode.push(strUnicode);
|
|
}
|
|
|
|
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 (var i = 0; i < platforms.length; i++) {
|
|
var strs = names[i];
|
|
for (var j = 0; j < strs.length; j++) {
|
|
var str = strs[j];
|
|
var nameRecord =
|
|
platforms[i] + // platform ID
|
|
encodings[i] + // encoding ID
|
|
languages[i] + // language ID
|
|
string16(i) + // name ID
|
|
string16(str.length) +
|
|
string16(strOffset);
|
|
nameTable += nameRecord;
|
|
strOffset += str.length;
|
|
}
|
|
}
|
|
|
|
nameTable += strings.join("") + stringsUnicode.join("");
|
|
return nameTable;
|
|
}
|
|
|
|
function isFixedPitch(glyphs) {
|
|
for (var i = 0; i < glyphs.length - 1; i++) {
|
|
if (glyphs[i] != glyphs[i+1])
|
|
return false;
|
|
}
|
|
return true;
|
|
};
|
|
|
|
// The offsets object holds at the same time a representation of where
|
|
// to write the table entry information about a table and another offset
|
|
// representing the offset where to draw the actual data of a particular
|
|
// table
|
|
var kRequiredTablesCount = 9;
|
|
var offsets = {
|
|
currentOffset: 0,
|
|
virtualOffset: 9 * (4 * 4)
|
|
};
|
|
|
|
var otf = new Uint8Array(kMaxFontFileSize);
|
|
createOpenTypeHeader("\x4F\x54\x54\x4F", otf, offsets, 9);
|
|
|
|
var charstrings = font.charstrings;
|
|
properties.fixedPitch = isFixedPitch(charstrings);
|
|
var fields = {
|
|
// PostScript Font Program
|
|
"CFF ": font.data,
|
|
|
|
// OS/2 and Windows Specific metrics
|
|
"OS/2": stringToArray(createOS2Table(properties)),
|
|
|
|
// Character to glyphs mapping
|
|
"cmap": createCMapTable(charstrings.slice()),
|
|
|
|
// Font header
|
|
"head": (function() {
|
|
return stringToArray(
|
|
"\x00\x01\x00\x00" + // Version number
|
|
"\x00\x00\x10\x00" + // fontRevision
|
|
"\x00\x00\x00\x00" + // checksumAdjustement
|
|
"\x5F\x0F\x3C\xF5" + // magicNumber
|
|
"\x00\x00" + // Flags
|
|
"\x03\xE8" + // unitsPerEM (defaulting to 1000)
|
|
"\x00\x00\x00\x00\x9e\x0b\x7e\x27" + // creation date
|
|
"\x00\x00\x00\x00\x9e\x0b\x7e\x27" + // modifification date
|
|
"\x00\x00" + // xMin
|
|
string16(properties.descent) + // yMin
|
|
"\x0F\xFF" + // xMax
|
|
string16(properties.ascent) + // yMax
|
|
string16(properties.italicAngle ? 2 : 0) + // macStyle
|
|
"\x00\x11" + // lowestRecPPEM
|
|
"\x00\x00" + // fontDirectionHint
|
|
"\x00\x00" + // indexToLocFormat
|
|
"\x00\x00"); // glyphDataFormat
|
|
})(),
|
|
|
|
// Horizontal header
|
|
"hhea": (function() {
|
|
return stringToArray(
|
|
"\x00\x01\x00\x00" + // Version number
|
|
string16(properties.ascent) + // Typographic Ascent
|
|
string16(properties.descent) + // Typographic Descent
|
|
"\x00\x00" + // Line Gap
|
|
"\xFF\xFF" + // advanceWidthMax
|
|
"\x00\x00" + // minLeftSidebearing
|
|
"\x00\x00" + // minRightSidebearing
|
|
"\x00\x00" + // xMaxExtent
|
|
string16(properties.capHeight) + // caretSlopeRise
|
|
string16(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(charstrings.length + 1)); // Number of HMetrics
|
|
})(),
|
|
|
|
// Horizontal metrics
|
|
"hmtx": (function() {
|
|
var hmtx = "\x00\x00\x00\x00"; // Fake .notdef
|
|
for (var i = 0; i < charstrings.length; i++) {
|
|
hmtx += string16(charstrings[i].width) + string16(0);
|
|
}
|
|
return stringToArray(hmtx);
|
|
})(),
|
|
|
|
// Maximum profile
|
|
"maxp": (function() {
|
|
return stringToArray(
|
|
"\x00\x00\x50\x00" + // Version number
|
|
string16(charstrings.length + 1)); // Num of glyphs
|
|
})(),
|
|
|
|
// Naming tables
|
|
"name": stringToArray(createNameTable(fontName)),
|
|
|
|
// PostScript informations
|
|
"post": stringToArray(createPostTable(properties))
|
|
};
|
|
|
|
for (var field in fields)
|
|
createTableEntry(otf, offsets, field, fields[field]);
|
|
|
|
for (var field in fields) {
|
|
var table = fields[field];
|
|
otf.set(table, offsets.currentOffset);
|
|
offsets.currentOffset += table.length;
|
|
}
|
|
|
|
var fontData = [];
|
|
for (var i = 0; i < offsets.currentOffset; i++)
|
|
fontData.push(otf[i]);
|
|
return fontData;
|
|
},
|
|
|
|
bindWorker: function font_bindWorker(data) {
|
|
postMessage({
|
|
action: "font",
|
|
data: {
|
|
raw: data,
|
|
fontName: this.name,
|
|
mimetype: this.mimetype
|
|
}
|
|
});
|
|
},
|
|
|
|
bindDOM: function font_bindDom(data) {
|
|
var fontName = this.name;
|
|
|
|
// Add the @font-face rule to the document
|
|
var url = "url(data:" + this.mimetype + ";base64," + window.btoa(data) + ");";
|
|
var rule = "@font-face { font-family:'" + fontName + "';src:" + url + "}";
|
|
var styleSheet = document.styleSheets[0];
|
|
styleSheet.insertRule(rule, styleSheet.cssRules.length);
|
|
|
|
return rule;
|
|
}
|
|
};
|
|
|
|
return constructor;
|
|
})();
|
|
|
|
/**
|
|
* Type1Parser encapsulate the needed code for parsing a Type1 font
|
|
* program.
|
|
* Some of its logic depends on the Type2 charstrings structure.
|
|
*/
|
|
var Type1Parser = function() {
|
|
/*
|
|
* Decrypt a Sequence of Ciphertext Bytes to Produce the Original Sequence
|
|
* of Plaintext Bytes. The function took a key as a parameter which can be
|
|
* for decrypting the eexec block of for decoding charStrings.
|
|
*/
|
|
var kEexecEncryptionKey = 55665;
|
|
var kCharStringsEncryptionKey = 4330;
|
|
|
|
function decrypt(stream, key, discardNumber) {
|
|
var r = key, c1 = 52845, c2 = 22719;
|
|
var decryptedString = [];
|
|
|
|
var value = "";
|
|
var count = stream.length;
|
|
for (var i = 0; i < count; i++) {
|
|
value = stream[i];
|
|
decryptedString[i] = value ^ (r >> 8);
|
|
r = ((value + r) * c1 + c2) & ((1 << 16) - 1);
|
|
}
|
|
return decryptedString.slice(discardNumber);
|
|
};
|
|
|
|
/*
|
|
* CharStrings are encoded following the the CharString Encoding sequence
|
|
* describe in Chapter 6 of the "Adobe Type1 Font Format" specification.
|
|
* The value in a byte indicates a command, a number, or subsequent bytes
|
|
* that are to be interpreted in a special way.
|
|
*
|
|
* CharString Number Encoding:
|
|
* A CharString byte containing the values from 32 through 255 inclusive
|
|
* indicate an integer. These values are decoded in four ranges.
|
|
*
|
|
* 1. A CharString byte containing a value, v, between 32 and 246 inclusive,
|
|
* indicate the integer v - 139. Thus, the integer values from -107 through
|
|
* 107 inclusive may be encoded in single byte.
|
|
*
|
|
* 2. A CharString byte containing a value, v, between 247 and 250 inclusive,
|
|
* indicates an integer involving the next byte, w, according to the formula:
|
|
* [(v - 247) x 256] + w + 108
|
|
*
|
|
* 3. A CharString byte containing a value, v, between 251 and 254 inclusive,
|
|
* indicates an integer involving the next byte, w, according to the formula:
|
|
* -[(v - 251) * 256] - w - 108
|
|
*
|
|
* 4. A CharString containing the value 255 indicates that the next 4 bytes
|
|
* are a two complement signed integer. The first of these bytes contains the
|
|
* highest order bits, the second byte contains the next higher order bits
|
|
* and the fourth byte contain the lowest order bits.
|
|
*
|
|
*
|
|
* CharString Command Encoding:
|
|
* CharStrings commands are encoded in 1 or 2 bytes.
|
|
*
|
|
* Single byte commands are encoded in 1 byte that contains a value between
|
|
* 0 and 31 inclusive.
|
|
* If a command byte contains the value 12, then the value in the next byte
|
|
* indicates a command. This "escape" mechanism allows many extra commands
|
|
* to be encoded and this encoding technique helps to minimize the length of
|
|
* the charStrings.
|
|
*/
|
|
var charStringDictionary = {
|
|
"1": "hstem",
|
|
"3": "vstem",
|
|
"4": "vmoveto",
|
|
"5": "rlineto",
|
|
"6": "hlineto",
|
|
"7": "vlineto",
|
|
"8": "rrcurveto",
|
|
|
|
// closepath is a Type1 command that do not take argument and is useless
|
|
// in Type2 and it can simply be ignored.
|
|
"9": null, // closepath
|
|
|
|
"10": "callsubr",
|
|
|
|
// return is normally used inside sub-routines to tells to the execution
|
|
// flow that it can be back to normal.
|
|
// During the translation process Type1 charstrings will be flattened and
|
|
// sub-routines will be embedded directly into the charstring directly, so
|
|
// this can be ignored safely.
|
|
"11": "return",
|
|
|
|
"12": {
|
|
// dotsection is a Type1 command to specify some hinting feature for dots
|
|
// that do not take a parameter and it can safely be ignored for Type2.
|
|
"0": null, // dotsection
|
|
|
|
// [vh]stem3 are Type1 only and Type2 supports [vh]stem with multiple
|
|
// parameters, so instead of returning [vh]stem3 take a shortcut and
|
|
// return [vhstem] instead.
|
|
"1": "vstem",
|
|
"2": "hstem",
|
|
|
|
// Type1 only command with command not (yet) built-in ,throw an error
|
|
"6": -1, // seac
|
|
"7": -1, //sbw
|
|
|
|
"11": "sub",
|
|
"12": "div",
|
|
|
|
// callothersubr is a mechanism to make calls on the postscript
|
|
// interpreter, this is not supported by Type2 charstring but hopefully
|
|
// most of the default commands can be ignored safely.
|
|
"16": "callothersubr",
|
|
|
|
"17": "pop",
|
|
|
|
// setcurrentpoint sets the current point to x, y without performing a
|
|
// moveto (this is a one shot positionning command). This is used only
|
|
// with the return of an OtherSubrs call.
|
|
// TODO Implement the OtherSubrs charstring embedding and replace this
|
|
// call by a no-op, like 2 'pop' commands for example.
|
|
"33": null, //setcurrentpoint
|
|
},
|
|
"13": "hsbw",
|
|
"14": "endchar",
|
|
"21": "rmoveto",
|
|
"22": "hmoveto",
|
|
"30": "vhcurveto",
|
|
"31": "hvcurveto"
|
|
};
|
|
|
|
var kEscapeCommand = 12;
|
|
|
|
function decodeCharString(array) {
|
|
var charstring = [];
|
|
var lsb = 0;
|
|
var width = 0;
|
|
var used = false;
|
|
|
|
var value = "";
|
|
var count = array.length;
|
|
for (var i = 0; i < count; i++) {
|
|
value = parseInt(array[i]);
|
|
|
|
if (value < 32) {
|
|
var command = null;
|
|
if (value == kEscapeCommand) {
|
|
var escape = array[++i];
|
|
|
|
// TODO Clean this code
|
|
if (escape == 16) {
|
|
var index = charstring.pop();
|
|
var argc = charstring.pop();
|
|
var data = charstring.pop();
|
|
|
|
// If the flex mechanishm is not used in a font program, Adobe
|
|
// state that that entries 0, 1 and 2 can simply be replace by
|
|
// {}, which means that we can simply ignore them.
|
|
if (index < 3) {
|
|
continue;
|
|
}
|
|
|
|
// This is the same things about hint replacement, if it is not used
|
|
// entry 3 can be replaced by {3}
|
|
if (index == 3) {
|
|
charstring.push(3);
|
|
i++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
command = charStringDictionary["12"][escape];
|
|
} else {
|
|
// TODO Clean this code
|
|
if (value == 13) {
|
|
if (charstring.length == 2) {
|
|
width = charstring[1];
|
|
} else if (charstring.length == 4 && charstring[3] == "div") {
|
|
width = charstring[1] / charstring[2];
|
|
} else {
|
|
error("Unsupported hsbw format: " + charstring);
|
|
}
|
|
|
|
lsb = charstring[0];
|
|
charstring.push(lsb, "hmoveto");
|
|
charstring.splice(0, 1);
|
|
continue;
|
|
}
|
|
command = charStringDictionary[value];
|
|
}
|
|
|
|
// Some charstring commands are meaningless in Type2 and will return
|
|
// a null, let's just ignored them
|
|
if (!command && i < count) {
|
|
continue;
|
|
} else if (!command) {
|
|
break;
|
|
} else if (command == -1) {
|
|
error("Support for Type1 command " + value + " (" + escape + ") is not implemented in charstring: " + charString);
|
|
}
|
|
|
|
value = command;
|
|
} else if (value <= 246) {
|
|
value = parseInt(value) - 139;
|
|
} else if (value <= 250) {
|
|
value = ((value - 247) * 256) + parseInt(array[++i]) + 108;
|
|
} else if (value <= 254) {
|
|
value = -((value - 251) * 256) - parseInt(array[++i]) - 108;
|
|
} else {
|
|
value = (array[++i] & 0xff) << 24 | (array[++i] & 0xff) << 16 |
|
|
(array[++i] & 0xff) << 8 | (array[++i] & 0xff) << 0;
|
|
}
|
|
|
|
charstring.push(value);
|
|
}
|
|
|
|
return { charstring: charstring, width: width, lsb: lsb };
|
|
};
|
|
|
|
/**
|
|
* Returns an object containing a Subrs array and a CharStrings array
|
|
* extracted from and eexec encrypted block of data
|
|
*/
|
|
function readNumberArray(str, index) {
|
|
var start = ++index;
|
|
var count = 0;
|
|
while (str[index++] != "]")
|
|
count++;
|
|
|
|
var array = str.substr(start, count).split(" ");
|
|
for (var i = 0; i < array.length; i++)
|
|
array[i] = parseFloat(array[i] || 0);
|
|
return array;
|
|
};
|
|
|
|
this.extractFontProgram = function t1_extractFontProgram(stream) {
|
|
var eexec = decrypt(stream, kEexecEncryptionKey, 4);
|
|
var eexecString = "";
|
|
for (var i = 0; i < eexec.length; i++)
|
|
eexecString += String.fromCharCode(eexec[i]);
|
|
|
|
var glyphsSection = false, subrsSection = false;
|
|
var extracted = {
|
|
subrs: [],
|
|
charstrings: [],
|
|
properties: {
|
|
stemSnapH: [0, 0],
|
|
stemSnapV: [0, 0]
|
|
}
|
|
};
|
|
|
|
var glyph = "";
|
|
var token = "";
|
|
var length = 0;
|
|
|
|
var c = "";
|
|
var count = eexecString.length;
|
|
for (var i = 0; i < count; i++) {
|
|
var c = eexecString[i];
|
|
|
|
if ((glyphsSection || subrsSection) && c == "R") {
|
|
var data = eexec.slice(i + 3, i + 3 + length);
|
|
var encoded = decrypt(data, kCharStringsEncryptionKey, 4);
|
|
var str = decodeCharString(encoded);
|
|
|
|
if (glyphsSection) {
|
|
extracted.charstrings.push({
|
|
glyph: glyph,
|
|
data: str.charstring,
|
|
lsb: str.lsb,
|
|
width: str.width
|
|
});
|
|
} else {
|
|
extracted.subrs.push(str.charstring);
|
|
}
|
|
i += length + 3;
|
|
} else if (c == " " || c == "\n") {
|
|
length = parseInt(token);
|
|
token = "";
|
|
} else {
|
|
token += c;
|
|
if (!glyphsSection) {
|
|
switch (token) {
|
|
case "/CharString":
|
|
glyphsSection = true;
|
|
break;
|
|
case "/Subrs":
|
|
subrsSection = true;
|
|
break;
|
|
case "/StdHW":
|
|
extracted.properties.stdHW = readNumberArray(eexecString, i + 2)[0];
|
|
break;
|
|
case "/StdVW":
|
|
extracted.properties.stdVW = readNumberArray(eexecString, i + 2)[0];
|
|
break;
|
|
case "/StemSnapH":
|
|
extracted.properties.stemSnapH = readNumberArray(eexecString, i + 2);
|
|
break;
|
|
case "/StemSnapV":
|
|
extracted.properties.stemSnapV = readNumberArray(eexecString, i + 2);
|
|
break;
|
|
}
|
|
} else if (c == "/") {
|
|
token = glyph = "";
|
|
while ((c = eexecString[++i]) != " ")
|
|
glyph += c;
|
|
}
|
|
}
|
|
}
|
|
|
|
return extracted;
|
|
},
|
|
|
|
this.extractFontHeader = function t1_extractFontProgram(stream) {
|
|
var headerString = "";
|
|
for (var i = 0; i < stream.length; i++)
|
|
headerString += String.fromCharCode(stream[i]);
|
|
|
|
var info = {
|
|
textMatrix: null
|
|
};
|
|
|
|
var token = "";
|
|
var count = headerString.length;
|
|
for (var i = 0; i < count; i++) {
|
|
var c = headerString[i];
|
|
if (c == " " || c == "\n") {
|
|
switch (token) {
|
|
case "/FontMatrix":
|
|
var matrix = readNumberArray(headerString, i + 1);
|
|
|
|
// The FontMatrix is in unitPerEm, so make it pixels
|
|
for (var j = 0; j < matrix.length; j++)
|
|
matrix[j] *= 1000;
|
|
|
|
// Make the angle into the right direction
|
|
matrix[2] *= -1;
|
|
|
|
info.textMatrix = matrix;
|
|
break;
|
|
}
|
|
token = "";
|
|
} else {
|
|
token += c;
|
|
}
|
|
}
|
|
|
|
return info;
|
|
};
|
|
};
|
|
|
|
/**
|
|
* The CFF class takes a Type1 file and wrap it into a 'Compact Font Format',
|
|
* which itself embed Type2 charstrings.
|
|
*/
|
|
var CFFStrings = [
|
|
".notdef","space","exclam","quotedbl","numbersign","dollar","percent","ampersand",
|
|
"quoteright","parenleft","parenright","asterisk","plus","comma","hyphen","period",
|
|
"slash","zero","one","two","three","four","five","six","seven","eight","nine",
|
|
"colon","semicolon","less","equal","greater","question","at","A","B","C","D","E",
|
|
"F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y",
|
|
"Z","bracketleft","backslash","bracketright","asciicircum","underscore",
|
|
"quoteleft","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q",
|
|
"r","s","t","u","v","w","x","y","z","braceleft","bar","braceright","asciitilde",
|
|
"exclamdown","cent","sterling","fraction","yen","florin","section","currency",
|
|
"quotesingle","quotedblleft","guillemotleft","guilsinglleft","guilsinglright",
|
|
"fi","fl","endash","dagger","daggerdbl","periodcentered","paragraph","bullet",
|
|
"quotesinglbase","quotedblbase","quotedblright","guillemotright","ellipsis",
|
|
"perthousand","questiondown","grave","acute","circumflex","tilde","macron",
|
|
"breve","dotaccent","dieresis","ring","cedilla","hungarumlaut","ogonek","caron",
|
|
"emdash","AE","ordfeminine","Lslash","Oslash","OE","ordmasculine","ae","dotlessi",
|
|
"lslash","oslash","oe","germandbls","onesuperior","logicalnot","mu","trademark",
|
|
"Eth","onehalf","plusminus","Thorn","onequarter","divide","brokenbar","degree",
|
|
"thorn","threequarters","twosuperior","registered","minus","eth","multiply",
|
|
"threesuperior","copyright","Aacute","Acircumflex","Adieresis","Agrave","Aring",
|
|
"Atilde","Ccedilla","Eacute","Ecircumflex","Edieresis","Egrave","Iacute",
|
|
"Icircumflex","Idieresis","Igrave","Ntilde","Oacute","Ocircumflex","Odieresis",
|
|
"Ograve","Otilde","Scaron","Uacute","Ucircumflex","Udieresis","Ugrave","Yacute",
|
|
"Ydieresis","Zcaron","aacute","acircumflex","adieresis","agrave","aring","atilde",
|
|
"ccedilla","eacute","ecircumflex","edieresis","egrave","iacute","icircumflex",
|
|
"idieresis","igrave","ntilde","oacute","ocircumflex","odieresis","ograve",
|
|
"otilde","scaron","uacute","ucircumflex","udieresis","ugrave","yacute",
|
|
"ydieresis","zcaron","exclamsmall","Hungarumlautsmall","dollaroldstyle",
|
|
"dollarsuperior","ampersandsmall","Acutesmall","parenleftsuperior",
|
|
"parenrightsuperior","266 ff","onedotenleader","zerooldstyle","oneoldstyle",
|
|
"twooldstyle","threeoldstyle","fouroldstyle","fiveoldstyle","sixoldstyle",
|
|
"sevenoldstyle","eightoldstyle","nineoldstyle","commasuperior",
|
|
"threequartersemdash","periodsuperior","questionsmall","asuperior","bsuperior",
|
|
"centsuperior","dsuperior","esuperior","isuperior","lsuperior","msuperior",
|
|
"nsuperior","osuperior","rsuperior","ssuperior","tsuperior","ff","ffi","ffl",
|
|
"parenleftinferior","parenrightinferior","Circumflexsmall","hyphensuperior",
|
|
"Gravesmall","Asmall","Bsmall","Csmall","Dsmall","Esmall","Fsmall","Gsmall",
|
|
"Hsmall","Ismall","Jsmall","Ksmall","Lsmall","Msmall","Nsmall","Osmall","Psmall",
|
|
"Qsmall","Rsmall","Ssmall","Tsmall","Usmall","Vsmall","Wsmall","Xsmall","Ysmall",
|
|
"Zsmall","colonmonetary","onefitted","rupiah","Tildesmall","exclamdownsmall",
|
|
"centoldstyle","Lslashsmall","Scaronsmall","Zcaronsmall","Dieresissmall",
|
|
"Brevesmall","Caronsmall","Dotaccentsmall","Macronsmall","figuredash",
|
|
"hypheninferior","Ogoneksmall","Ringsmall","Cedillasmall","questiondownsmall",
|
|
"oneeighth","threeeighths","fiveeighths","seveneighths","onethird","twothirds",
|
|
"zerosuperior","foursuperior","fivesuperior","sixsuperior","sevensuperior",
|
|
"eightsuperior","ninesuperior","zeroinferior","oneinferior","twoinferior",
|
|
"threeinferior","fourinferior","fiveinferior","sixinferior","seveninferior",
|
|
"eightinferior","nineinferior","centinferior","dollarinferior","periodinferior",
|
|
"commainferior","Agravesmall","Aacutesmall","Acircumflexsmall","Atildesmall",
|
|
"Adieresissmall","Aringsmall","AEsmall","Ccedillasmall","Egravesmall",
|
|
"Eacutesmall","Ecircumflexsmall","Edieresissmall","Igravesmall","Iacutesmall",
|
|
"Icircumflexsmall","Idieresissmall","Ethsmall","Ntildesmall","Ogravesmall",
|
|
"Oacutesmall","Ocircumflexsmall","Otildesmall","Odieresissmall","OEsmall",
|
|
"Oslashsmall","Ugravesmall","Uacutesmall","Ucircumflexsmall","Udieresissmall",
|
|
"Yacutesmall","Thornsmall","Ydieresissmall","001.000","001.001","001.002",
|
|
"001.003","Black","Bold","Book","Light","Medium","Regular","Roman","Semibold"
|
|
];
|
|
|
|
var type1Parser = new Type1Parser();
|
|
|
|
var CFF = function(name, file, properties) {
|
|
// Get the data block containing glyphs and subrs informations
|
|
var length1 = file.dict.get("Length1");
|
|
var length2 = file.dict.get("Length2");
|
|
|
|
var headerBlock = file.getBytes(length1);
|
|
var header = type1Parser.extractFontHeader(headerBlock);
|
|
for (var info in header)
|
|
properties[info] = header[info];
|
|
|
|
// Decrypt the data blocks and retrieve it's content
|
|
var eexecBlock = file.getBytes(length2);
|
|
var data = type1Parser.extractFontProgram(eexecBlock);
|
|
for (var info in data.properties)
|
|
properties[info] = data.properties[info];
|
|
|
|
var charstrings = this.getOrderedCharStrings(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);
|
|
};
|
|
|
|
CFF.prototype = {
|
|
createCFFIndexHeader: function cff_createCFFIndexHeader(objects, isByte) {
|
|
// First 2 bytes contains the number of objects contained into this index
|
|
var count = objects.length;
|
|
|
|
// If there is no object, just create an array saying that with another
|
|
// offset byte.
|
|
if (count == 0)
|
|
return "\x00\x00\x00";
|
|
|
|
var data = String.fromCharCode(count >> 8, count & 0xff);
|
|
|
|
// Next byte contains the offset size use to reference object in the file
|
|
// Actually we're using 0x04 to be sure to be able to store everything
|
|
// without thinking of it while coding.
|
|
data += "\x04";
|
|
|
|
// Add another offset after this one because we need a new offset
|
|
var relativeOffset = 1;
|
|
for (var i = 0; i < count + 1; i++) {
|
|
data += String.fromCharCode(relativeOffset >> 24, relativeOffset >> 16,
|
|
relativeOffset >> 8, relativeOffset & 0xff);
|
|
|
|
if (objects[i])
|
|
relativeOffset += objects[i].length;
|
|
}
|
|
|
|
for (var i =0; i < count; i++) {
|
|
for (var j = 0; j < objects[i].length; j++)
|
|
data += isByte ? String.fromCharCode(objects[i][j]) : objects[i][j];
|
|
}
|
|
return data;
|
|
},
|
|
|
|
encodeNumber: function cff_encodeNumber(value) {
|
|
if (value >= -32768 && value <= 32767) {
|
|
return "\x1c" +
|
|
String.fromCharCode(value >> 8) +
|
|
String.fromCharCode(value & 0xFF);
|
|
} else if (value >= (-2147483647-1) && value <= 2147483647) {
|
|
return "\xff" +
|
|
String.fromCharCode(value >> 24) +
|
|
String.fromCharCode(value >> 16) +
|
|
String.fromCharCode(value >> 8) +
|
|
String.fromCharCode(value & 0xFF);
|
|
}
|
|
error("Value: " + value + " is not allowed");
|
|
return null;
|
|
},
|
|
|
|
getOrderedCharStrings: function cff_getOrderedCharStrings(glyphs) {
|
|
var charstrings = [];
|
|
|
|
for (var i = 0; i < glyphs.length; i++) {
|
|
var glyph = glyphs[i];
|
|
var unicode = GlyphsUnicode[glyph.glyph];
|
|
if (!unicode) {
|
|
if (glyph.glyph != ".notdef")
|
|
warn(glyph + " does not have an entry in the glyphs unicode dictionary");
|
|
} else {
|
|
charstrings.push({
|
|
glyph: glyph,
|
|
unicode: unicode,
|
|
charstring: glyph.data,
|
|
width: glyph.width,
|
|
lsb: glyph.lsb
|
|
});
|
|
}
|
|
};
|
|
|
|
charstrings.sort(function charstrings_sort(a, b) {
|
|
return a.unicode - b.unicode;
|
|
});
|
|
return charstrings;
|
|
},
|
|
|
|
getType2Charstrings: function cff_getType2Charstrings(type1Charstrings) {
|
|
var type2Charstrings = [];
|
|
var count = type1Charstrings.length;
|
|
for (var i = 0; i < count; i++) {
|
|
var charstring = type1Charstrings[i].charstring;
|
|
type2Charstrings.push(this.flattenCharstring(charstring.slice(), this.commandsMap));
|
|
}
|
|
return type2Charstrings;
|
|
},
|
|
|
|
getType2Subrs: function cff_getType2Charstrings(type1Subrs) {
|
|
var bias = 0;
|
|
var count = type1Subrs.length;
|
|
if (count < 1240)
|
|
bias = 107;
|
|
else if (count < 33900)
|
|
bias = 1131;
|
|
else
|
|
bias = 32768;
|
|
|
|
// Add a bunch of empty subrs to deal with the Type2 bias
|
|
var type2Subrs = [];
|
|
for (var i = 0; i < bias; i++)
|
|
type2Subrs.push([0x0B]);
|
|
|
|
for (var i = 0; i < count; i++)
|
|
type2Subrs.push(this.flattenCharstring(type1Subrs[i], this.commandsMap));
|
|
|
|
return type2Subrs;
|
|
},
|
|
|
|
/*
|
|
* Flatten the commands by interpreting the postscript code and replacing
|
|
* every 'callsubr', 'callothersubr' by the real commands.
|
|
*/
|
|
commandsMap: {
|
|
"hstem": 1,
|
|
"vstem": 3,
|
|
"vmoveto": 4,
|
|
"rlineto": 5,
|
|
"hlineto": 6,
|
|
"vlineto": 7,
|
|
"rrcurveto": 8,
|
|
"callsubr": 10,
|
|
"return": 11,
|
|
"sub": [12, 11],
|
|
"div": [12, 12],
|
|
"pop": [1, 12, 18],
|
|
"endchar": 14,
|
|
"rmoveto": 21,
|
|
"hmoveto": 22,
|
|
"vhcurveto": 30,
|
|
"hvcurveto": 31,
|
|
},
|
|
|
|
flattenCharstring: function flattenCharstring(charstring, map) {
|
|
for (var i = 0; i < charstring.length; i++) {
|
|
var command = charstring[i];
|
|
if (command.charAt) {
|
|
var cmd = map[command];
|
|
assert(cmd, "Unknow command: " + command);
|
|
|
|
if (IsArray(cmd)) {
|
|
charstring.splice(i++, 1, cmd[0], cmd[1]);
|
|
} else {
|
|
charstring[i] = cmd;
|
|
}
|
|
} else {
|
|
charstring.splice(i, 1, 28, command >> 8, command & 0xff);
|
|
i+= 2;
|
|
}
|
|
}
|
|
return charstring;
|
|
},
|
|
|
|
wrap: function wrap(name, glyphs, charstrings, subrs, properties) {
|
|
var fields = {
|
|
"header": "\x01\x00\x04\x04", // major version, minor version, header size, offset size
|
|
|
|
"names": this.createCFFIndexHeader([name]),
|
|
|
|
"topDict": (function topDict(self) {
|
|
return function() {
|
|
var dict =
|
|
"\x00\x01\x01\x01\x30" +
|
|
"\xf8\x1b\x00" + // version
|
|
"\xf8\x1b\x01" + // Notice
|
|
"\xf8\x1b\x02" + // FullName
|
|
"\xf8\x1b\x03" + // FamilyName
|
|
"\xf8\x1b\x04" + // Weight
|
|
"\x1c\x00\x00\x10"; // Encoding
|
|
|
|
var boundingBox = properties.bbox;
|
|
for (var i = 0; i < boundingBox.length; i++)
|
|
dict += self.encodeNumber(boundingBox[i]);
|
|
dict += "\x05"; // FontBBox;
|
|
|
|
var offset = fields.header.length +
|
|
fields.names.length +
|
|
(dict.length + (4 + 4 + 7)) +
|
|
fields.strings.length +
|
|
fields.globalSubrs.length;
|
|
dict += self.encodeNumber(offset) + "\x0f"; // Charset
|
|
|
|
offset = offset + (glyphs.length * 2) + 1;
|
|
dict += self.encodeNumber(offset) + "\x11"; // Charstrings
|
|
|
|
dict += self.encodeNumber(fields.private.length);
|
|
var offset = offset + fields.charstrings.length;
|
|
dict += self.encodeNumber(offset) + "\x12"; // Private
|
|
|
|
return dict;
|
|
};
|
|
})(this),
|
|
|
|
"strings": (function strings(self) {
|
|
var strings = [
|
|
"Version 0.11", // Version
|
|
"See original notice", // Notice
|
|
name, // FullName
|
|
name, // FamilyName
|
|
"Medium" // Weight
|
|
];
|
|
return self.createCFFIndexHeader(strings);
|
|
})(this),
|
|
|
|
"globalSubrs": this.createCFFIndexHeader([]),
|
|
|
|
"charset": (function charset(self) {
|
|
var charset = "\x00"; // Encoding
|
|
|
|
var count = glyphs.length;
|
|
for (var i = 0; i < count; i++) {
|
|
var index = CFFStrings.indexOf(charstrings[i].glyph.glyph);
|
|
// Some characters like asterikmath && circlecopyrt are missing from the
|
|
// original strings, for the moment let's map them to .notdef and see
|
|
// later if it cause any problems
|
|
if (index == -1)
|
|
index = 0;
|
|
|
|
charset += String.fromCharCode(index >> 8, index & 0xff);
|
|
}
|
|
return charset;
|
|
})(this),
|
|
|
|
"charstrings": this.createCFFIndexHeader([[0x8B, 0x0E]].concat(glyphs), true),
|
|
|
|
"private": (function(self) {
|
|
var data =
|
|
"\x8b\x14" + // defaultWidth
|
|
"\x8b\x15" + // nominalWidth
|
|
self.encodeNumber(properties.stdHW || 0) + "\x0a" + // StdHW
|
|
self.encodeNumber(properties.stdVW || 0) + "\x0b"; // StdVW
|
|
|
|
var stemH = properties.stemSnapH;
|
|
for (var i = 0; i < stemH.length; i++)
|
|
data += self.encodeNumber(stemH[i]);
|
|
data += "\x0c\x0c"; // StemSnapH
|
|
|
|
var stemV = properties.stemSnapV;
|
|
for (var i = 0; i < stemV.length; i++)
|
|
data += self.encodeNumber(stemV[i]);
|
|
data += "\x0c\x0d"; // StemSnapV
|
|
|
|
data += self.encodeNumber(data.length + 4) + "\x13"; // Subrs offset
|
|
|
|
return data;
|
|
})(this),
|
|
|
|
"localSubrs": this.createCFFIndexHeader(subrs, true)
|
|
};
|
|
fields.topDict = fields.topDict();
|
|
|
|
|
|
var cff = [];
|
|
for (var index in fields) {
|
|
var field = fields[index];
|
|
for (var i = 0; i < field.length; i++)
|
|
cff.push(field.charCodeAt(i));
|
|
}
|
|
|
|
return cff;
|
|
}
|
|
};
|
|
|