Fully support truetype composite fonts, clean up
This commit is contained in:
Adil Allawi
parent
926e4f1130
commit
36763e8e82
182
fonts.js
182
fonts.js
@ -411,7 +411,7 @@ var Font = (function() {
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break;
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}
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this.data = data;
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this.type = properties.type; //use the type to test if the string is single or multi-byte
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this.type = properties.type; // Use the type to test if the string is single or multi-byte
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this.id = Fonts.registerFont(name, data, properties);
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this.loadedName = 'pdfFont' + this.id;
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this.compositeFont = properties.compositeFont;
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@ -682,6 +682,65 @@ var Font = (function() {
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'\x00\x00\x00\x00'; // maxMemType1
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};
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function createNameTable(name) {
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var strings = [
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'Original licence', // 0.Copyright
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name, // 1.Font family
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'Unknown', // 2.Font subfamily (font weight)
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'uniqueID', // 3.Unique ID
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name, // 4.Full font name
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'Version 0.11', // 5.Version
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'', // 6.Postscript name
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'Unknown', // 7.Trademark
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'Unknown', // 8.Manufacturer
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'Unknown' // 9.Designer
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];
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// Mac want 1-byte per character strings while Windows want
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// 2-bytes per character, so duplicate the names table
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var stringsUnicode = [];
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for (var i = 0; i < strings.length; i++) {
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var str = strings[i];
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var strUnicode = '';
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for (var j = 0; j < str.length; j++)
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strUnicode += string16(str.charCodeAt(j));
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stringsUnicode.push(strUnicode);
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}
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var names = [strings, stringsUnicode];
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var platforms = ['\x00\x01', '\x00\x03'];
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var encodings = ['\x00\x00', '\x00\x01'];
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var languages = ['\x00\x00', '\x04\x09'];
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var namesRecordCount = strings.length * platforms.length;
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var nameTable =
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'\x00\x00' + // format
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string16(namesRecordCount) + // Number of names Record
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string16(namesRecordCount * 12 + 6); // Storage
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// Build the name records field
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var strOffset = 0;
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for (var i = 0; i < platforms.length; i++) {
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var strs = names[i];
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for (var j = 0; j < strs.length; j++) {
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var str = strs[j];
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var nameRecord =
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platforms[i] + // platform ID
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encodings[i] + // encoding ID
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languages[i] + // language ID
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string16(j) + // name ID
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string16(str.length) +
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string16(strOffset);
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nameTable += nameRecord;
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strOffset += str.length;
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}
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}
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nameTable += strings.join('') + stringsUnicode.join('');
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return nameTable;
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}
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constructor.prototype = {
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name: null,
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font: null,
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@ -814,7 +873,7 @@ var Font = (function() {
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// This keep a reference to the CMap and the post tables since they can
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// be rewritted
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var cmap, post;
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var cmap, post, nameTable, maxp;
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var tables = [];
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for (var i = 0; i < numTables; i++) {
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@ -825,6 +884,10 @@ var Font = (function() {
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cmap = table;
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else if (table.tag == 'post')
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post = table;
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else if (table.tag == 'name')
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nameTable = table;
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else if (table.tag == 'maxp')
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maxp = table;
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requiredTables.splice(index, 1);
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}
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@ -859,24 +922,50 @@ var Font = (function() {
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data: stringToArray(createOS2Table(properties))
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});
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if (!cmap) {
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// Replace the old CMAP table with a shiny new one
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if (properties.type == 'CIDFontType2') {
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// Type2 composite fonts map charcters directly to glyphs so the cmap
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// table must be replaced.
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var glyphs = [];
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var charset = properties.charset;
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for (var i=1; i < charset.length; i++) {
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if (charset.indexOf(i) != -1) {
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if (charset.length == 0)
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{
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// PDF did not contain a GIDMap for the font so create an identity cmap
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// First get the number of glyphs from the maxp table
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font.pos = (font.start ? font.start : 0) + maxp.length;
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var version = int16(font.getBytes(4));
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var numGlyphs = int16(font.getBytes(2));
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// Now create an identity mapping
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for (var i=1; i < numGlyphs; i++) {
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glyphs.push({
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unicode: charset.indexOf(i)
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unicode: i
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});
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} else {
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break;
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}
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} else {
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for (var i=1; i < charset.length; i++) {
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if (charset.indexOf(i) != -1) {
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glyphs.push({
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unicode: charset.indexOf(i)
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});
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} else {
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break;
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}
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}
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}
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tables.push({
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tag: 'cmap',
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data: createCMapTable(glyphs)
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})
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if (!cmap) {
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// Font did not contain a cmap
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tables.push({
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tag: 'cmap',
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data: createCMapTable(glyphs)
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})
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} else {
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cmap.data = createCMapTable(glyphs);
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}
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} else {
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// Replace the old CMAP table with a shiny new one
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replaceCMapTable(cmap, font, properties);
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}
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@ -888,6 +977,14 @@ var Font = (function() {
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});
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}
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// Rewrite the 'name' table if needed
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if (!nameTable) {
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tables.push({
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tag: 'name',
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data: stringToArray(createNameTable(this.name))
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});
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}
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// Tables needs to be written by ascendant alphabetic order
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tables.sort(function tables_sort(a, b) {
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return (a.tag > b.tag) - (a.tag < b.tag);
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@ -930,65 +1027,6 @@ var Font = (function() {
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},
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convert: function font_convert(fontName, font, properties) {
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function createNameTable(name) {
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var strings = [
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'Original licence', // 0.Copyright
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name, // 1.Font family
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'Unknown', // 2.Font subfamily (font weight)
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'uniqueID', // 3.Unique ID
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name, // 4.Full font name
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'Version 0.11', // 5.Version
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'', // 6.Postscript name
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'Unknown', // 7.Trademark
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'Unknown', // 8.Manufacturer
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'Unknown' // 9.Designer
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];
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// Mac want 1-byte per character strings while Windows want
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// 2-bytes per character, so duplicate the names table
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var stringsUnicode = [];
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for (var i = 0; i < strings.length; i++) {
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var str = strings[i];
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var strUnicode = '';
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for (var j = 0; j < str.length; j++)
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strUnicode += string16(str.charCodeAt(j));
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stringsUnicode.push(strUnicode);
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}
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var names = [strings, stringsUnicode];
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var platforms = ['\x00\x01', '\x00\x03'];
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var encodings = ['\x00\x00', '\x00\x01'];
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var languages = ['\x00\x00', '\x04\x09'];
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var namesRecordCount = strings.length * platforms.length;
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var nameTable =
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'\x00\x00' + // format
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string16(namesRecordCount) + // Number of names Record
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string16(namesRecordCount * 12 + 6); // Storage
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// Build the name records field
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var strOffset = 0;
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for (var i = 0; i < platforms.length; i++) {
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var strs = names[i];
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for (var j = 0; j < strs.length; j++) {
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var str = strs[j];
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var nameRecord =
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platforms[i] + // platform ID
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encodings[i] + // encoding ID
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languages[i] + // language ID
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string16(j) + // name ID
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string16(str.length) +
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string16(strOffset);
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nameTable += nameRecord;
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strOffset += str.length;
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}
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}
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nameTable += strings.join('') + stringsUnicode.join('');
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return nameTable;
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}
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function isFixedPitch(glyphs) {
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for (var i = 0; i < glyphs.length - 1; i++) {
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if (glyphs[i] != glyphs[i + 1])
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50
pdf.js
50
pdf.js
@ -3630,7 +3630,7 @@ var PartialEvaluator = (function() {
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var compositeFont = false;
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assertWellFormed(IsName(subType), 'invalid font Subtype');
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//If font is a composite
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// If font is a composite
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// - get the descendant font
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// - set the type according to the descendant font
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// - get the FontDescriptor from the descendant font
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@ -3664,31 +3664,35 @@ var PartialEvaluator = (function() {
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var encodingMap = {};
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var charset = [];
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if (compositeFont) {
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//Special CIDFont support
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//XXX only identity CID Encodings supported for now
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var encoding = xref.fetchIfRef(fontDict.get('Encoding'));
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if (IsName(encoding)) {
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//Encoding is a predefined CMap
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if (encoding.name == 'Identity-H') {
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if (subType.name == 'CIDFontType2') {
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var cidToGidMap = descendant.get('CIDToGIDMap');
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if (cidToGidMap) {
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//Extract the charset from the CIDToGIDMap
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var glyphsStream = xref.fetchIfRef(cidToGidMap);
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var glyphsData = glyphsStream.getBytes(0);
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var i = 0;
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//glyph ids are big-endian 2-byte values
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for (var j=0; j<glyphsData.length; j++) {
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var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
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charset.push(glyphID);
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}
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}
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// Special CIDFont support
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// XXX only CIDFontType2 supported for now
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if (subType.name == 'CIDFontType2') {
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var cidToGidMap = descendant.get('CIDToGIDMap');
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if (cidToGidMap && IsRef(cidToGidMap)) {
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// Extract the charset from the CIDToGIDMap
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var glyphsStream = xref.fetchIfRef(cidToGidMap);
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var glyphsData = glyphsStream.getBytes(0);
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var i = 0;
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// Glyph ids are big-endian 2-byte values
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for (var j=0; j<glyphsData.length; j++) {
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var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
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charset.push(glyphID);
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}
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}
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}
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else {
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// XXX This is a placeholder for handling of the encoding of CIDFontType0 fonts
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var encoding = xref.fetchIfRef(fontDict.get('Encoding'));
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if (IsName(encoding)) {
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// Encoding is a predefined CMap
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if (encoding.name == 'Identity-H') {
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TODO ('Need to create an identity cmap')
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} else {
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TODO ('Need to support predefined CMaps see PDF 32000-1:2008 9.7.5.2 Predefined CMaps')
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}
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} else {
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TODO ('Need to support predefined CMaps see PDF 32000-1:2008 9.7.5.2 Predefined CMaps')
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TODO ('Need to support encoding streams see PDF 32000-1:2008 9.7.5.3');
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}
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} else {
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TODO ('Need to support encoding streams see PDF 32000-1:2008 9.7.5.3');
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}
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} else if (fontDict.has('Encoding')) {
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var encoding = xref.fetchIfRef(fontDict.get('Encoding'));
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