Beginning of the separatation of the Type1/CFF/OTF code
This commit is contained in:
Vivien Nicolas
parent
0a135091de
commit
a8ce1d24e9
882
PDFFont.js
882
PDFFont.js
@ -1,6 +1,12 @@
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/* -*- 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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/**
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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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* Hold a map of decoded fonts and of the standard fourteen Type1 fonts and
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* their acronyms.
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@ -32,20 +38,32 @@ var Font = function(aFontName, aFontFile, aFontType) {
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switch (aFontType) {
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case "Type1":
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// All Type1 font program should begin with the comment %!
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if (aFontFile.getByte() != 0x25 || aFontFile.getByte() != 0x21)
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error("Invalid file header");
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var cff = new CFF(aFontName, aFontFile);
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this.mimetype = "font/otf";
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this.font = new Type1(aFontName, aFontFile);
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// Wrap the CFF data inside an OTF font file
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this.font = this.cover(cff);
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break;
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case "TrueType":
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this.mimetype = "font/ttf";
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this.font = new TrueType(aFontName, aFontFile);
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var ttf = new TrueType(aFontName, aFontFile);
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this.font = ttf.data;
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break;
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default:
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error("Font " + aFontType + " is not supported");
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warn("Font " + aFontType + " is not supported");
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break;
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}
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Fonts[aFontName] = this.font;
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// Attach the font to the document
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this.bind();
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Fonts[aFontName] = this.font;
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};
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Font.prototype = {
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@ -53,8 +71,8 @@ Font.prototype = {
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font: null,
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mimetype: null,
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bind: function() {
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var data = this.font.data;
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bind: function font_bind() {
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var data = this.font;
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// Compute the binary data to base 64
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var str = [];
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@ -70,12 +88,413 @@ Font.prototype = {
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var rule = "@font-face { font-family:'" + this.name + "';src:" + url + "}";
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var styleSheet = document.styleSheets[0];
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styleSheet.insertRule(rule, styleSheet.length);
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},
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_createOpenTypeHeader: function font_createOpenTypeHeader(aNumTables) {
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// sfnt version (4 bytes)
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var version = [0x4F, 0x54, 0x54, 0X4F];
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// numTables (2 bytes)
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var numTables = aNumTables;
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// searchRange (2 bytes)
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var tablesMaxPower2 = FontsUtils.getMaxPower2(numTables);
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var searchRange = tablesMaxPower2 * 16;
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// entrySelector (2 bytes)
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var entrySelector = Math.log(tablesMaxPower2) / Math.log(2);
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// rangeShift (2 bytes)
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var rangeShift = numTables * 16 - searchRange;
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return [].concat(version,
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FontsUtils.integerToBytes(numTables, 2),
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FontsUtils.integerToBytes(searchRange, 2),
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FontsUtils.integerToBytes(entrySelector, 2),
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FontsUtils.integerToBytes(rangeShift, 2));
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},
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_createTableEntry: function font_createTableEntry(aTag, aOffset, aData) {
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// tag
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var tag = [
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aTag.charCodeAt(0),
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aTag.charCodeAt(1),
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aTag.charCodeAt(2),
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aTag.charCodeAt(3)
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];
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// offset
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var offset = aOffset;
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// Per spec tables must be 4-bytes align so add some 0x00 if needed
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while (aData.length & 3)
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aData.push(0x00);
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// length
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var length = aData.length;
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// checksum
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var checksum = FontsUtils.bytesToInteger(tag) + offset + length;
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return [].concat(tag,
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FontsUtils.integerToBytes(checksum, 4),
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FontsUtils.integerToBytes(offset, 4),
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FontsUtils.integerToBytes(length, 4));
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},
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_createCMAPTable: function font_createCMAPTable(aGlyphs) {
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var data = new Array(1000);
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for (var i = 0; i < aGlyphs.length; i++)
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data[aGlyphs[i].unicode] = i + 1;
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var ranges = [];
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var range = [];
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for (var i = 0; i < data.length; i++) {
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var char = data[i];
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if (char) {
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range.push(i);
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} else if (range.length) {
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if (0) {
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log("create a new range of " + range.length + " chars width min: " + range[0] + " to max: " + range[range.length - 1]);
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log("range content is: " + range);
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}
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ranges.push(range.slice());
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range = [];
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}
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}
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var cmap = [];
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var segCount = ranges.length + 1;
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var segCount2 = segCount * 2;
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var searchRange = FontsUtils.getMaxPower2(segCount) * 2;
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var searchEntry = Math.log(segCount) / Math.log(2);
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var rangeShift = 2 * segCount - searchRange;
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cmap = cmap.concat(FontsUtils.integerToBytes(segCount2, 2));
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cmap = cmap.concat(FontsUtils.integerToBytes(searchRange, 2));
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cmap = cmap.concat(FontsUtils.integerToBytes(searchEntry, 2));
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cmap = cmap.concat(FontsUtils.integerToBytes(rangeShift, 2));
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// End characters code with an additional 0xFFFF to finish the array
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for (var i = 0; i < ranges.length; i++) {
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var range = ranges[i];
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cmap = cmap.concat(FontsUtils.integerToBytes(range[range.length - 1], 2));
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};
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cmap = cmap.concat([0xFF, 0xFF]);
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// reserved pad
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cmap = cmap.concat([0x00, 0x00]);
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// Start characters code with an additional 0xFFFF to finish the array
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for (var i = 0; i < ranges.length; i++) {
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var range = ranges[i];
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cmap = cmap.concat(FontsUtils.integerToBytes(range[0], 2));
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};
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cmap = cmap.concat([0xFF, 0xFF]);
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// Fill idDelta
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var delta = 0;
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var p = 0;
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for (var i = 0; i < ranges.length; i++) {
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var range = ranges[i];
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var start = range[0];
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var delta = ((start - 1) - p) % 65536;
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var value = FontsUtils.integerToBytes(delta, 2);
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value[0] ^= 0xFF;
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value[1] ^= 0xFF;
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value[1] += 1;
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cmap = cmap.concat([value[0], value[1]]);
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p += range.length;
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};
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cmap = cmap.concat([0x00, 0x01]);
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// Fill id Offsets with 0x00
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for (var i = 0; i < ranges.length; i++) {
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var range = ranges[i];
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cmap = cmap.concat([0x00, 0x00]);
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};
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cmap = cmap.concat([0x00, 0x00]);
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var cmapHeader = [
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0x00, 0x00, // version
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0x00, 0x01, // numTables
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0x00, 0x03, // platformID
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0x00, 0x01, // encodingID
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0x00, 0x00, 0x00, 0x0C, // start of the table record
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0x00, 0x04 // format
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];
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cmapHeader = cmapHeader.concat(FontsUtils.integerToBytes(cmap.length + 6, 2)); // length
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cmapHeader = cmapHeader.concat(0x00, 0x00); // language
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// Fill up data!
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for (var i = 0; i < ranges.length; i++) {
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var range = ranges[i];
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for (var j = 0; j < range.length; j++)
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cmap = cmap.concat(range[j]);
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};
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cmap = cmapHeader.concat(cmap);
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return cmap;
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},
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cover: function font_cover(aFont) {
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var otf = new Uint8Array(kMaxFontFileSize);
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var aFontData = aFont.data;
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var currentOffset = 0;
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var numTables = 9;
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//var tables = [OS2, cmap, head, hhea, hmtx, maxp, name, post];
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var header = this._createOpenTypeHeader(numTables);
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otf.set(header, currentOffset);
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currentOffset += header.length;
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var baseOffset = numTables * (4 * 4) + currentOffset;
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var virtualOffset = baseOffset;
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var tableEntry = this._createTableEntry("CFF ", virtualOffset, aFontData);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += aFontData.length;
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var OS2 = [
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0x00, 0x03, // version
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0x02, 0x24, // xAvgCharWidth
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0x01, 0xF4, // usWeightClass
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0x00, 0x05, // usWidthClass
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0x00, 0x00, // fstype
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0x02, 0x8A, // ySubscriptXSize
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0x02, 0xBB, // ySubscriptYSize
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0x00, 0x00, // ySubscriptXOffset
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0x00, 0x8C, // ySubscriptYOffset
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0x02, 0x8A, // ySuperScriptXSize
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0x02, 0xBB, // ySuperScriptYSize
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0x00, 0x00, // ySuperScriptXOffset
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0x01, 0xDF, // ySuperScriptYOffset
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0x00, 0x31, // yStrikeOutSize
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0x01, 0x02, // yStrikeOutPosition
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0x00, 0x00, // sFamilyClass
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0x02, 0x00, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Panose
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0x00, 0x00, 0x00, 0x01, // ulUnicodeRange1 (Bits 0-31)
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0x00, 0x00, 0x00, 0x00, // ulUnicodeRange2 (Bits 32-63)
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0x00, 0x00, 0x00, 0x00, // ulUnicodeRange3 (Bits 64-95)
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0x00, 0x00, 0x00, 0x00, // ulUnicodeRange4 (Bits 96-127)
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0x47, 0x49, 0x60, 0x20, // achVendID
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0x00, 0x20, // fsSelection
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0x00, 0x2D, // usFirstCharIndex
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0x00, 0x7A, // usLastCharIndex
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0x00, 0x03, // sTypoAscender
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0x00, 0x20, // sTypeDescender
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0x00, 0x38, // sTypoLineGap
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0x00, 0x5A, // usWinAscent
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0x02, 0xB4, // usWinDescent
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0x00, 0xCE, 0x00, 0x00, // ulCodePageRange1 (Bits 0-31)
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0x00, 0x01, 0x00, 0x00, // ulCodePageRange2 (Bits 32-63)
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0x00, 0x00, // sxHeight
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0x00, 0x00, // sCapHeight
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0x00, 0x01, // usDefaultChar
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0x00, 0xCD, // usBreakChar
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0x00, 0x02 // usMaxContext
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];
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var tableEntry = this._createTableEntry("OS/2", virtualOffset, OS2);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += OS2.length;
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/** CMAP */
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var charstrings = aFont.getOrderedCharStrings(aFont.font);
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var cmap = this._createCMAPTable(charstrings);
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var tableEntry = this._createTableEntry("cmap", virtualOffset, cmap);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += cmap.length;
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/** HEAD */
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var head = [
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0x00, 0x01, 0x00, 0x00, // Version number
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0x00, 0x00, 0x50, 0x00, // fontRevision
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0x00, 0x00, 0x00, 0x00, // checksumAdjustement
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0x5F, 0x0F, 0x3C, 0xF5, // magicNumber
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0x00, 0x00, // Flags
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0x03, 0xE8, // unitsPerEM (>= 16 && <=16384)
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // created
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // modified
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0x00, 0x00, // xMin
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0x00, 0x00, // yMin
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0x00, 0x00, // xMax
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0x00, 0x00, // yMax
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0x00, 0x00, // macStyle
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0x00, 0x00, // lowestRecPPEM
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0x00, 0x00, // fontDirectionHint
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0x00, 0x00, // indexToLocFormat
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0x00, 0x00 // glyphDataFormat
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];
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var tableEntry = this._createTableEntry("head", virtualOffset, head);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += head.length;
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/** HHEA */
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var hhea = [
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0x00, 0x01, 0x00, 0x00, // Version number
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0x00, 0x00, // Typographic Ascent
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0x00, 0x00, // Typographic Descent
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0x00, 0x00, // Line Gap
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0xFF, 0xFF, // advanceWidthMax
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0x00, 0x00, // minLeftSidebearing
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0x00, 0x00, // minRightSidebearing
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0x00, 0x00, // xMaxExtent
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0x00, 0x00, // caretSlopeRise
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0x00, 0x00, // caretSlopeRun
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0x00, 0x00, // caretOffset
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0x00, 0x00, // -reserved-
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0x00, 0x00, // -reserved-
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0x00, 0x00, // -reserved-
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0x00, 0x00, // -reserved-
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0x00, 0x00 // metricDataFormat
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];
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hhea = hhea.concat(FontsUtils.integerToBytes(charstrings.length, 2)); // numberOfHMetrics
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var tableEntry = this._createTableEntry("hhea", virtualOffset, hhea);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += hhea.length;
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/** HMTX */
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var hmtx = [0x01, 0xF4, 0x00, 0x00];
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for (var i = 0; i < charstrings.length; i++) {
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var charstring = charstrings[i].charstring;
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var width = FontsUtils.integerToBytes(charstring[1], 2);
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var lsb = FontsUtils.integerToBytes(charstring[0], 2);
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hmtx = hmtx.concat(width, lsb);
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}
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var tableEntry = this._createTableEntry("hmtx", virtualOffset, hmtx);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += hmtx.length;
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/** MAXP */
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var maxp = [
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0x00, 0x00, 0x50, 0x00, // Version number
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].concat(FontsUtils.integerToBytes(charstrings.length + 1, 2)); // Num of glyphs (+1 to pass the sanitizer...)
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var tableEntry = this._createTableEntry("maxp", virtualOffset, maxp);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += maxp.length;
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/** NAME */
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var name = [
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0x00, 0x00, // format
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0x00, 0x00, // Number of names Record
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0x00, 0x00 // Storage
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];
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var tableEntry = this._createTableEntry("name", virtualOffset, name);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += name.length;
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/** POST */
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// XXX get those info from the Font dict!
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var post = [
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0x00, 0x03, 0x00, 0x00, // Version number
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0x00, 0x00, 0x01, 0x00, // italicAngle
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0x00, 0x00, // underlinePosition
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0x00, 0x00, // underlineThickness
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0x00, 0x00, 0x00, 0x00, // isFixedPitch
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0x00, 0x00, 0x00, 0x00, // minMemType42
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0x00, 0x00, 0x00, 0x00, // maxMemType42
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0x00, 0x00, 0x00, 0x00, // minMemType1
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0x00, 0x00, 0x00, 0x00 // maxMemType1
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];
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var tableEntry = this._createTableEntry("post", virtualOffset, post);
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otf.set(tableEntry, currentOffset);
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currentOffset += tableEntry.length;
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virtualOffset += post.length;
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// Set the CFF data
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otf.set(aFontData, currentOffset);
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currentOffset += aFontData.length;
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var tables = [OS2, cmap, head, hhea, hmtx, maxp, name, post];
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for (var i = 0; i < tables.length; i++) {
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var table = tables[i];
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otf.set(table, currentOffset);
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currentOffset += table.length;
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}
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var fontData = [];
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for (var i = 0; i < currentOffset; i++)
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fontData.push(otf[i]);
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//writeToFile(fontData, "/tmp/pdf.js." + fontCount + ".otf");
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return fontData;
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}
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};
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var FontsUtils = {
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integerToBytes: function fu_integerToBytes(aValue, aBytesCount) {
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var bytes = [];
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for (var i = 0; i < aBytesCount; i++)
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bytes[i] = 0x00;
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do {
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bytes[--aBytesCount] = (aValue & 0xFF);
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aValue = aValue >> 8;
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} while (aBytesCount && aValue > 0);
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return bytes;
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},
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bytesToInteger: function(aBytesArray) {
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var value = 0;
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for (var i = 0; i < aBytesArray.length; i++)
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value = (value << 8) + aBytesArray[i];
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return value;
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||||
},
|
||||
|
||||
getMaxPower2: function fu_getMaxPower2(aNumber) {
|
||||
var maxPower = 0;
|
||||
var value = aNumber;
|
||||
while (value >= 2) {
|
||||
value /= 2;
|
||||
maxPower++;
|
||||
}
|
||||
|
||||
value = 2;
|
||||
for (var i = 1; i < maxPower; i++)
|
||||
value *= 2;
|
||||
return value;
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
/** Implementation dirty logic starts here */
|
||||
|
||||
var kMaxFontFileSize = 100000;
|
||||
/**
|
||||
* At the moment TrueType is just a stub that does mostly nothing but in a
|
||||
* (near?) future this class will rewrite the font to ensure it is well formed
|
||||
* and valid in the point of view of the sanitizer.
|
||||
*/
|
||||
var TrueType = function(aFontName, aFontFile) {
|
||||
this.data = aFontFile;
|
||||
};
|
||||
|
||||
/**
|
||||
* This dictionary holds decoded fonts data.
|
||||
@ -124,17 +543,6 @@ var Stack = function() {
|
||||
};
|
||||
};
|
||||
|
||||
var TrueType = function(aFontName, aFontFile) {
|
||||
var debug = true;
|
||||
function dump(aMsg) {
|
||||
if (debug)
|
||||
log(aMsg);
|
||||
}
|
||||
|
||||
dump("Loading a TrueType font: " + aFontName);
|
||||
this.data = aFontFile;
|
||||
};
|
||||
|
||||
var Type1Parser = function(aAsciiStream, aBinaryStream) {
|
||||
var lexer = aAsciiStream ? new Lexer(aAsciiStream) : null;
|
||||
|
||||
@ -760,11 +1168,7 @@ var Type1Parser = function(aAsciiStream, aBinaryStream) {
|
||||
|
||||
|
||||
var fontCount = 0;
|
||||
var Type1 = function(aFontName, aFontFile) {
|
||||
// All Type1 font program should begin with the comment %!
|
||||
if (aFontFile.getByte() != 0x25 || aFontFile.getByte() != 0x21)
|
||||
error("Invalid file header");
|
||||
|
||||
var CFF = function(aFontName, aFontFile) {
|
||||
if (!fontCount || true) {
|
||||
fontCount++;
|
||||
var start = Date.now();
|
||||
@ -774,14 +1178,14 @@ var Type1 = function(aFontName, aFontFile) {
|
||||
|
||||
this.parser = new Type1Parser(ASCIIStream, binaryStream);
|
||||
var fontName = this.parser.parse();
|
||||
var font = PSFonts.get(fontName);
|
||||
this.data = this.convertToOTF(this.convertToCFF(font), font);
|
||||
this.font = PSFonts.get(fontName);
|
||||
this.data = this.convertToCFF(this.font);
|
||||
var end = Date.now();
|
||||
log("Time to parse font is:" + (end - start));
|
||||
}
|
||||
};
|
||||
|
||||
Type1.prototype = {
|
||||
CFF.prototype = {
|
||||
getDefaultWidth: function(aCharstrings) {
|
||||
var defaultWidth = 0;
|
||||
var defaultUsedCount = 0;
|
||||
@ -809,7 +1213,7 @@ Type1.prototype = {
|
||||
if (count ==0)
|
||||
return [0x00, 0x00, 0x00];
|
||||
|
||||
var bytes = this.integerToBytes(count, 2);
|
||||
var bytes = FontsUtils.integerToBytes(count, 2);
|
||||
for (var i = 0; i < bytes.length; i++)
|
||||
data.push(bytes[i]);
|
||||
|
||||
@ -821,7 +1225,7 @@ Type1.prototype = {
|
||||
// Add another offset after this one because we need a new offset
|
||||
var relativeOffset = 1;
|
||||
for (var i = 0; i < count + 1; i++) {
|
||||
var bytes = this.integerToBytes(relativeOffset, 4);
|
||||
var bytes = FontsUtils.integerToBytes(relativeOffset, 4);
|
||||
for (var j = 0; j < bytes.length; j++)
|
||||
data.push(bytes[j]);
|
||||
|
||||
@ -836,42 +1240,22 @@ Type1.prototype = {
|
||||
return data;
|
||||
},
|
||||
|
||||
integerToBytes: function(aValue, aBytesCount) {
|
||||
var bytes = [];
|
||||
for (var i = 0; i < aBytesCount; i++)
|
||||
bytes[i] = 0x00;
|
||||
|
||||
do {
|
||||
bytes[--aBytesCount] = (aValue & 0xFF);
|
||||
aValue = aValue >> 8;
|
||||
} while (aBytesCount && aValue > 0);
|
||||
|
||||
return bytes;
|
||||
},
|
||||
|
||||
bytesToInteger: function(aBytesArray) {
|
||||
var value = 0;
|
||||
for (var i = 0; i < aBytesArray.length; i++)
|
||||
value = (value << 8) + aBytesArray[i];
|
||||
return value;
|
||||
},
|
||||
|
||||
encodeNumber: function(aValue) {
|
||||
var x = 0;
|
||||
// XXX we don't really care about Type2 optimization here...
|
||||
if (aValue >= -32768 && aValue <= 32767) {
|
||||
return [
|
||||
28,
|
||||
this.integerToBytes(aValue >> 8, 1),
|
||||
this.integerToBytes(aValue, 1)
|
||||
FontsUtils.integerToBytes(aValue >> 8, 1),
|
||||
FontsUtils.integerToBytes(aValue, 1)
|
||||
];
|
||||
} else if (aValue >= (-2147483647-1) && aValue <= 2147483647) {
|
||||
return [
|
||||
0xFF,
|
||||
this.integerToBytes(aValue >> 24, 1),
|
||||
this.integerToBytes(aValue >> 16, 1),
|
||||
this.integerToBytes(aValue >> 8, 1),
|
||||
this.integerToBytes(aValue, 1)
|
||||
FontsUtils.integerToBytes(aValue >> 24, 1),
|
||||
FontsUtils.integerToBytes(aValue >> 16, 1),
|
||||
FontsUtils.integerToBytes(aValue >> 8, 1),
|
||||
FontsUtils.integerToBytes(aValue, 1)
|
||||
];
|
||||
} else {
|
||||
error("Value: " + aValue + " is not allowed");
|
||||
@ -891,7 +1275,7 @@ Type1.prototype = {
|
||||
|
||||
var b1 = parseInt("0x" + unicode[0] + unicode[1]);
|
||||
var b2 = parseInt("0x" + unicode[2] + unicode[3]);
|
||||
unicode = this.bytesToInteger([b1, b2]);
|
||||
unicode = FontsUtils.bytesToInteger([b1, b2]);
|
||||
|
||||
charstrings.push({
|
||||
glyph: glyph,
|
||||
@ -973,7 +1357,7 @@ Type1.prototype = {
|
||||
var index = CFFStrings.indexOf(charstrings[i].glyph);
|
||||
if (index == -1)
|
||||
index = CFFStrings.length + strings.indexOf(glyph);
|
||||
var bytes = this.integerToBytes(index, 2);
|
||||
var bytes = FontsUtils.integerToBytes(index, 2);
|
||||
charset.push(bytes[0]);
|
||||
charset.push(bytes[1]);
|
||||
}
|
||||
@ -1121,392 +1505,6 @@ Type1.prototype = {
|
||||
//log("== write to file");
|
||||
//writeToFile(fontData, "/tmp/pdf.js." + fontCount + ".cff");
|
||||
|
||||
return fontData;
|
||||
},
|
||||
|
||||
getMaxPower2: function(aNumber) {
|
||||
var maxPower = 0;
|
||||
var value = aNumber;
|
||||
while (value >= 2) {
|
||||
value /= 2;
|
||||
maxPower++;
|
||||
}
|
||||
|
||||
value = 2;
|
||||
for (var i = 1; i < maxPower; i++)
|
||||
value *= 2;
|
||||
return value;
|
||||
},
|
||||
|
||||
createOpenTypeHeader: function(aNumTables) {
|
||||
// sfnt version (4 bytes)
|
||||
var version = [0x4F, 0x54, 0x54, 0X4F];
|
||||
|
||||
// numTables (2 bytes)
|
||||
var numTables = aNumTables;
|
||||
|
||||
// searchRange (2 bytes)
|
||||
var searchRange = this.getMaxPower2(numTables) * 16;
|
||||
|
||||
// entrySelector (2 bytes)
|
||||
var entrySelector = Math.log(this.getMaxPower2(numTables)) / Math.log(2);
|
||||
|
||||
// rangeShift (2 bytes)
|
||||
var rangeShift = numTables * 16 - searchRange;
|
||||
|
||||
return [].concat(version,
|
||||
this.integerToBytes(numTables, 2),
|
||||
this.integerToBytes(searchRange, 2),
|
||||
this.integerToBytes(entrySelector, 2),
|
||||
this.integerToBytes(rangeShift, 2));
|
||||
},
|
||||
|
||||
createTableEntry: function(aTag, aOffset, aData) {
|
||||
// tag
|
||||
var tag = [
|
||||
aTag.charCodeAt(0),
|
||||
aTag.charCodeAt(1),
|
||||
aTag.charCodeAt(2),
|
||||
aTag.charCodeAt(3)
|
||||
];
|
||||
|
||||
// offset
|
||||
var offset = aOffset;
|
||||
|
||||
// length
|
||||
// Per spec tables must be 4-bytes align so add some 0x00 if needed
|
||||
while (aData.length & 3)
|
||||
aData.push(0x00);
|
||||
|
||||
var length = aData.length;
|
||||
|
||||
// checksum
|
||||
var checksum = this.bytesToInteger(tag) + offset + length;
|
||||
|
||||
return [].concat(tag,
|
||||
this.integerToBytes(checksum, 4),
|
||||
this.integerToBytes(offset, 4),
|
||||
this.integerToBytes(length, 4));
|
||||
},
|
||||
|
||||
convertToOTF: function(aData, aFont) {
|
||||
var otf = new Uint8Array(kMaxFontFileSize);
|
||||
var currentOffset = 0;
|
||||
|
||||
var numTables = 9;
|
||||
var header = this.createOpenTypeHeader(numTables);
|
||||
otf.set(header, currentOffset);
|
||||
currentOffset += header.length;
|
||||
|
||||
var baseOffset = numTables * (4 * 4) + currentOffset;
|
||||
var virtualOffset = baseOffset;
|
||||
var tableEntry = this.createTableEntry("CFF ", virtualOffset, aData);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += aData.length;
|
||||
|
||||
var OS2 = [
|
||||
0x00, 0x03, // version
|
||||
0x02, 0x24, // xAvgCharWidth
|
||||
0x01, 0xF4, // usWeightClass
|
||||
0x00, 0x05, // usWidthClass
|
||||
0x00, 0x00, // fstype
|
||||
0x02, 0x8A, // ySubscriptXSize
|
||||
0x02, 0xBB, // ySubscriptYSize
|
||||
0x00, 0x00, // ySubscriptXOffset
|
||||
0x00, 0x8C, // ySubscriptYOffset
|
||||
0x02, 0x8A, // ySuperScriptXSize
|
||||
0x02, 0xBB, // ySuperScriptYSize
|
||||
0x00, 0x00, // ySuperScriptXOffset
|
||||
0x01, 0xDF, // ySuperScriptYOffset
|
||||
0x00, 0x31, // yStrikeOutSize
|
||||
0x01, 0x02, // yStrikeOutPosition
|
||||
0x00, 0x00, // sFamilyClass
|
||||
0x02, 0x00, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Panose
|
||||
0x00, 0x00, 0x00, 0x01, // ulUnicodeRange1 (Bits 0-31)
|
||||
0x00, 0x00, 0x00, 0x00, // ulUnicodeRange2 (Bits 32-63)
|
||||
0x00, 0x00, 0x00, 0x00, // ulUnicodeRange3 (Bits 64-95)
|
||||
0x00, 0x00, 0x00, 0x00, // ulUnicodeRange4 (Bits 96-127)
|
||||
0x47, 0x49, 0x60, 0x20, // achVendID
|
||||
0x00, 0x20, // fsSelection
|
||||
0x00, 0x2D, // usFirstCharIndex
|
||||
0x00, 0x7A, // usLastCharIndex
|
||||
0x00, 0x03, // sTypoAscender
|
||||
0x00, 0x20, // sTypeDescender
|
||||
0x00, 0x38, // sTypoLineGap
|
||||
0x00, 0x5A, // usWinAscent
|
||||
0x02, 0xB4, // usWinDescent
|
||||
0x00, 0xCE, 0x00, 0x00, // ulCodePageRange1 (Bits 0-31)
|
||||
0x00, 0x01, 0x00, 0x00, // ulCodePageRange2 (Bits 32-63)
|
||||
0x00, 0x00, // sxHeight
|
||||
0x00, 0x00, // sCapHeight
|
||||
0x00, 0x01, // usDefaultChar
|
||||
0x00, 0xCD, // usBreakChar
|
||||
0x00, 0x02 // usMaxContext
|
||||
];
|
||||
|
||||
var tableEntry = this.createTableEntry("OS/2", virtualOffset, OS2);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += OS2.length;
|
||||
|
||||
/** CMAP */
|
||||
var charstrings = this.getOrderedCharStrings(aFont);
|
||||
|
||||
if (false) {
|
||||
var cmap = [
|
||||
0x00, 0x00, // version
|
||||
0x00, 0x01, // numTables
|
||||
0x00, 0x01, // platformID
|
||||
0x00, 0x00, // encodingID
|
||||
0x00, 0x00, 0x00, 0x0C, //offset
|
||||
0x00, 0x00,
|
||||
0x01, 0x06,
|
||||
0x00, 0x00
|
||||
];
|
||||
|
||||
var data = [];
|
||||
for (var i = 0; i < 262; i++) {
|
||||
data.push(0x00);
|
||||
}
|
||||
|
||||
for (var i = 0; i < charstrings.length; i++)
|
||||
data[charstrings[i].unicode] = i + 1;
|
||||
cmap = cmap.concat(data);
|
||||
}
|
||||
else {
|
||||
var data = new Array(1000);
|
||||
for (var i = 0; i < charstrings.length; i++)
|
||||
data[charstrings[i].unicode] = i + 1;
|
||||
|
||||
var ranges = [];
|
||||
var range = [];
|
||||
for (var i = 0; i < data.length; i++) {
|
||||
var char = data[i];
|
||||
if (char) {
|
||||
range.push(i);
|
||||
} else if (range.length) {
|
||||
if (0) {
|
||||
log("create a new range of " + range.length + " chars width min: " + range[0] + " to max: " + range[range.length - 1]);
|
||||
log("range content is: " + range);
|
||||
}
|
||||
ranges.push(range.slice());
|
||||
range = [];
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
var cmap = [];
|
||||
var segCount = ranges.length + 1;
|
||||
|
||||
var segCount2 = segCount * 2;
|
||||
var searchRange = this.getMaxPower2(segCount) * 2;
|
||||
var searchEntry = Math.log(segCount) / Math.log(2);
|
||||
var rangeShift = 2 * segCount - searchRange;
|
||||
cmap = cmap.concat(this.integerToBytes(segCount2, 2));
|
||||
cmap = cmap.concat(this.integerToBytes(searchRange, 2));
|
||||
cmap = cmap.concat(this.integerToBytes(searchEntry, 2));
|
||||
cmap = cmap.concat(this.integerToBytes(rangeShift, 2));
|
||||
|
||||
// End characters code with an additional 0xFFFF to finish the array
|
||||
for (var i = 0; i < ranges.length; i++) {
|
||||
var range = ranges[i];
|
||||
cmap = cmap.concat(this.integerToBytes(range[range.length - 1], 2));
|
||||
};
|
||||
cmap = cmap.concat([0xFF, 0xFF]);
|
||||
|
||||
// reserved pad
|
||||
cmap = cmap.concat([0x00, 0x00]);
|
||||
|
||||
// Start characters code with an additional 0xFFFF to finish the array
|
||||
for (var i = 0; i < ranges.length; i++) {
|
||||
var range = ranges[i];
|
||||
cmap = cmap.concat(this.integerToBytes(range[0], 2));
|
||||
};
|
||||
cmap = cmap.concat([0xFF, 0xFF]);
|
||||
|
||||
// Fill idDelta
|
||||
var delta = 0;
|
||||
var p = 0;
|
||||
for (var i = 0; i < ranges.length; i++) {
|
||||
var range = ranges[i];
|
||||
var start = range[0];
|
||||
var delta = ((start - 1) - p) % 65536;
|
||||
|
||||
var value = this.integerToBytes(delta, 2);
|
||||
value[0] ^= 0xFF;
|
||||
value[1] ^= 0xFF;
|
||||
value[1] += 1;
|
||||
cmap = cmap.concat([value[0], value[1]]);
|
||||
|
||||
p += range.length;
|
||||
};
|
||||
cmap = cmap.concat([0x00, 0x01]);
|
||||
|
||||
|
||||
// Fill id Offsets with 0x00
|
||||
for (var i = 0; i < ranges.length; i++) {
|
||||
var range = ranges[i];
|
||||
cmap = cmap.concat([0x00, 0x00]);
|
||||
};
|
||||
cmap = cmap.concat([0x00, 0x00]);
|
||||
|
||||
var cmapHeader = [
|
||||
0x00, 0x00, // version
|
||||
0x00, 0x01, // numTables
|
||||
0x00, 0x03, // platformID
|
||||
0x00, 0x01, // encodingID
|
||||
0x00, 0x00, 0x00, 0x0C, // start of the table record
|
||||
0x00, 0x04 // format
|
||||
];
|
||||
cmapHeader = cmapHeader.concat(this.integerToBytes(cmap.length + 6, 2)); // length
|
||||
cmapHeader = cmapHeader.concat(0x00, 0x00); // language
|
||||
|
||||
// Fill up data!
|
||||
for (var i = 0; i < ranges.length; i++) {
|
||||
var range = ranges[i];
|
||||
for (var j = 0; j < range.length; j++)
|
||||
cmap = cmap.concat(range[j]);
|
||||
};
|
||||
cmap = cmapHeader.concat(cmap);
|
||||
}
|
||||
|
||||
var tableEntry = this.createTableEntry("cmap", virtualOffset, cmap);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += cmap.length;
|
||||
|
||||
|
||||
/** HEAD */
|
||||
|
||||
var head = [
|
||||
0x00, 0x01, 0x00, 0x00, // Version number
|
||||
0x00, 0x00, 0x50, 0x00, // fontRevision
|
||||
0x00, 0x00, 0x00, 0x00, // checksumAdjustement
|
||||
0x5F, 0x0F, 0x3C, 0xF5, // magicNumber
|
||||
0x00, 0x00, // Flags
|
||||
0x03, 0xE8, // unitsPerEM (>= 16 && <=16384)
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // created
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // modified
|
||||
0x00, 0x00, // xMin
|
||||
0x00, 0x00, // yMin
|
||||
0x00, 0x00, // xMax
|
||||
0x00, 0x00, // yMax
|
||||
0x00, 0x00, // macStyle
|
||||
0x00, 0x00, // lowestRecPPEM
|
||||
0x00, 0x00, // fontDirectionHint
|
||||
0x00, 0x00, // indexToLocFormat
|
||||
0x00, 0x00 // glyphDataFormat
|
||||
];
|
||||
var tableEntry = this.createTableEntry("head", virtualOffset, head);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += head.length;
|
||||
|
||||
|
||||
/** HHEA */
|
||||
|
||||
var hhea = [
|
||||
0x00, 0x01, 0x00, 0x00, // Version number
|
||||
0x00, 0x00, // Typographic Ascent
|
||||
0x00, 0x00, // Typographic Descent
|
||||
0x00, 0x00, // Line Gap
|
||||
0xFF, 0xFF, // advanceWidthMax
|
||||
0x00, 0x00, // minLeftSidebearing
|
||||
0x00, 0x00, // minRightSidebearing
|
||||
0x00, 0x00, // xMaxExtent
|
||||
0x00, 0x00, // caretSlopeRise
|
||||
0x00, 0x00, // caretSlopeRun
|
||||
0x00, 0x00, // caretOffset
|
||||
0x00, 0x00, // -reserved-
|
||||
0x00, 0x00, // -reserved-
|
||||
0x00, 0x00, // -reserved-
|
||||
0x00, 0x00, // -reserved-
|
||||
0x00, 0x00 // metricDataFormat
|
||||
];
|
||||
hhea = hhea.concat(this.integerToBytes(charstrings.length, 2)); // numberOfHMetrics
|
||||
|
||||
var tableEntry = this.createTableEntry("hhea", virtualOffset, hhea);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += hhea.length;
|
||||
|
||||
/** HMTX */
|
||||
|
||||
var hmtx = [0x01, 0xF4, 0x00, 0x00];
|
||||
for (var i = 0; i < charstrings.length; i++) {
|
||||
var charstring = charstrings[i].charstring;
|
||||
var width = this.integerToBytes(charstring[1], 2);
|
||||
var lsb = this.integerToBytes(charstring[0], 2);
|
||||
hmtx = hmtx.concat(width, lsb);
|
||||
}
|
||||
|
||||
var tableEntry = this.createTableEntry("hmtx", virtualOffset, hmtx);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += hmtx.length;
|
||||
|
||||
|
||||
/** MAXP */
|
||||
|
||||
var maxp = [
|
||||
0x00, 0x00, 0x50, 0x00, // Version number
|
||||
].concat(this.integerToBytes(charstrings.length + 1, 2)); // Num of glyphs (+1 to pass the sanitizer...)
|
||||
|
||||
var tableEntry = this.createTableEntry("maxp", virtualOffset, maxp);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += maxp.length;
|
||||
|
||||
|
||||
/** NAME */
|
||||
|
||||
var name = [
|
||||
0x00, 0x00, // format
|
||||
0x00, 0x00, // Number of names Record
|
||||
0x00, 0x00 // Storage
|
||||
];
|
||||
var tableEntry = this.createTableEntry("name", virtualOffset, name);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += name.length;
|
||||
|
||||
|
||||
/** POST */
|
||||
|
||||
// XXX get those info from the Font dict!
|
||||
var post = [
|
||||
0x00, 0x03, 0x00, 0x00, // Version number
|
||||
0x00, 0x00, 0x01, 0x00, // italicAngle
|
||||
0x00, 0x00, // underlinePosition
|
||||
0x00, 0x00, // underlineThickness
|
||||
0x00, 0x00, 0x00, 0x00, // isFixedPitch
|
||||
0x00, 0x00, 0x00, 0x00, // minMemType42
|
||||
0x00, 0x00, 0x00, 0x00, // maxMemType42
|
||||
0x00, 0x00, 0x00, 0x00, // minMemType1
|
||||
0x00, 0x00, 0x00, 0x00 // maxMemType1
|
||||
];
|
||||
var tableEntry = this.createTableEntry("post", virtualOffset, post);
|
||||
otf.set(tableEntry, currentOffset);
|
||||
currentOffset += tableEntry.length;
|
||||
virtualOffset += post.length;
|
||||
|
||||
// Set the CFF data
|
||||
otf.set(aData, currentOffset);
|
||||
currentOffset += aData.length;
|
||||
|
||||
var tables = [OS2, cmap, head, hhea, hmtx, maxp, name, post];
|
||||
for (var i = 0; i < tables.length; i++) {
|
||||
var table = tables[i];
|
||||
otf.set(table, currentOffset);
|
||||
currentOffset += table.length;
|
||||
}
|
||||
|
||||
var fontData = [];
|
||||
for (var i = 0; i < currentOffset; i++)
|
||||
fontData.push(otf[i]);
|
||||
|
||||
//writeToFile(fontData, "/tmp/pdf.js." + fontCount + ".otf");
|
||||
return fontData;
|
||||
}
|
||||
};
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user