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add a closure around Font so we can hide helper functions in it

Andreas Gal 14 years ago
parent
5001ee7120
commit
75ad5aa016
1 changed files with 429 additions and 426 deletions
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  1. 855
      fonts.js

855
fonts.js
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@ -84,17 +84,18 @@ var Fonts = { @@ -84,17 +84,18 @@ var Fonts = {
* var type1Font = new Font("MyFontName", binaryFile, propertiesObject);
* type1Font.bind();
*/
var Font = function(aName, aFile, aProperties) {
this.name = aName;
// If the font has already been decoded simply return it
if (Fonts[aName]) {
this.font = Fonts[aName].data;
return;
}
fontCount++;
var Font = (function () {
var constructor = function(aName, aFile, aProperties) {
this.name = aName;
// If the font has already been decoded simply return it
if (Fonts[aName]) {
this.font = Fonts[aName].data;
return;
}
fontCount++;
switch (aProperties.type) {
switch (aProperties.type) {
case "Type1":
var cff = new CFF(aName, aFile, aProperties);
this.mimetype = "font/otf";
@ -124,448 +125,450 @@ var Font = function(aName, aFile, aProperties) { @@ -124,448 +125,450 @@ var Font = function(aName, aFile, aProperties) {
default:
warn("Font " + aProperties.type + " is not supported");
break;
}
Fonts[aName] = {
data: this.font,
properties: aProperties,
loading: true,
cache: Object.create(null)
}
// Attach the font to the document
this.bind();
};
/**
* A bunch of the OpenType code is duplicate between this class and the
* TrueType code, this is intentional and will merge in a future version
* where all the code relative to OpenType will probably have its own
* class and will take decision without the Fonts consent.
* But at the moment it allows to develop around the TrueType rewriting
* on the fly without messing up with the 'regular' Type1 to OTF conversion.
*/
Font.prototype = {
name: null,
font: null,
mimetype: null,
bind: function font_bind() {
var data = this.font;
// Get the base64 encoding of the binary font data
var str = "";
var length = data.length;
for (var i = 0; i < length; ++i)
str += String.fromCharCode(data[i]);
var dataBase64 = window.btoa(str);
var fontName = this.name;
/** Hack begin */
// Actually there is not event when a font has finished downloading so
// the following tons of code are a dirty hack to 'guess' when a font is
// ready
var debug = false;
if (debug) {
var name = document.createElement("font");
name.setAttribute("style", "position: absolute; left: 20px; top: " +
(100 * fontCount + 60) + "px");
name.innerHTML = fontName;
document.body.appendChild(name);
}
var canvas = document.createElement("canvas");
var style = "border: 1px solid black; position:absolute; top: " +
(debug ? (100 * fontCount) : "-200") + "px; left: 2px; width: 340px; height: 100px";
canvas.setAttribute("style", style);
canvas.setAttribute("width", 340);
canvas.setAttribute("heigth", 100);
document.body.appendChild(canvas);
// Retrieve font charset
var charset = Fonts[fontName].charset || [];
// if the charset is too small make it repeat a few times
var count = 30;
while (count-- && charset.length <= 30)
charset = charset.concat(charset.slice());
// Get the font size canvas think it will be for 'spaces'
var ctx = canvas.getContext("2d");
var testString = " ";
// When debugging use the characters provided by the charsets to visually
// see what's happening
if (debug) {
for (var i = 0; i < charset.length; i++) {
var unicode = GlyphsUnicode[charset[i]];
if (!unicode)
error("Unicode for " + charset[i] + " is has not been found in the glyphs list");
testString += String.fromCharCode(unicode);
}
Fonts[aName] = {
data: this.font,
properties: aProperties,
loading: true,
cache: Object.create(null)
}
ctx.font = "bold italic 20px " + fontName + ", Symbol, Arial";
var textWidth = ctx.measureText(testString).width;
if (debug)
ctx.fillText(testString, 20, 20);
// Attach the font to the document
this.bind();
};
var start = Date.now();
var interval = window.setInterval(function canvasInterval(self) {
ctx.font = "bold italic 20px " + fontName + ", Symbol, Arial";
// For some reasons the font has not loaded, so mark it loaded for the
// page to proceed but cry
if ((Date.now() - start) >= kMaxWaitForFontFace) {
window.clearInterval(interval);
Fonts[fontName].loading = false;
warn("Is " + fontName + " for charset: " + charset + " loaded?");
} else if (textWidth != ctx.measureText(testString).width) {
window.clearInterval(interval);
Fonts[fontName].loading = false;
/**
* A bunch of the OpenType code is duplicate between this class and the
* TrueType code, this is intentional and will merge in a future version
* where all the code relative to OpenType will probably have its own
* class and will take decision without the Fonts consent.
* But at the moment it allows to develop around the TrueType rewriting
* on the fly without messing up with the 'regular' Type1 to OTF conversion.
*/
constructor.prototype = {
name: null,
font: null,
mimetype: null,
bind: function font_bind() {
var data = this.font;
// Get the base64 encoding of the binary font data
var str = "";
var length = data.length;
for (var i = 0; i < length; ++i)
str += String.fromCharCode(data[i]);
var dataBase64 = window.btoa(str);
var fontName = this.name;
/** Hack begin */
// Actually there is not event when a font has finished downloading so
// the following tons of code are a dirty hack to 'guess' when a font is
// ready
var debug = false;
if (debug) {
var name = document.createElement("font");
name.setAttribute("style", "position: absolute; left: 20px; top: " +
(100 * fontCount + 60) + "px");
name.innerHTML = fontName;
document.body.appendChild(name);
}
if (debug)
ctx.fillText(testString, 20, 50);
}, 50, this);
/** Hack end */
// Add the @font-face rule to the document
var url = "url(data:" + this.mimetype + ";base64," + dataBase64 + ");";
var rule = "@font-face { font-family:'" + fontName + "';src:" + url + "}";
var styleSheet = document.styleSheets[0];
styleSheet.insertRule(rule, styleSheet.length);
},
_createOpenTypeHeader: function font_createOpenTypeHeader(aFile, aOffsets, aNumTables) {
// sfnt version (4 bytes)
var version = [0x4F, 0x54, 0x54, 0X4F];
// numTables (2 bytes)
var numTables = aNumTables;
// searchRange (2 bytes)
var tablesMaxPower2 = FontsUtils.getMaxPower2(numTables);
var searchRange = tablesMaxPower2 * 16;
// entrySelector (2 bytes)
var entrySelector = Math.log(tablesMaxPower2) / Math.log(2);
// rangeShift (2 bytes)
var rangeShift = numTables * 16 - searchRange;
var canvas = document.createElement("canvas");
var style = "border: 1px solid black; position:absolute; top: " +
(debug ? (100 * fontCount) : "-200") + "px; left: 2px; width: 340px; height: 100px";
canvas.setAttribute("style", style);
canvas.setAttribute("width", 340);
canvas.setAttribute("heigth", 100);
document.body.appendChild(canvas);
// Retrieve font charset
var charset = Fonts[fontName].charset || [];
// if the charset is too small make it repeat a few times
var count = 30;
while (count-- && charset.length <= 30)
charset = charset.concat(charset.slice());
// Get the font size canvas think it will be for 'spaces'
var ctx = canvas.getContext("2d");
var testString = " ";
// When debugging use the characters provided by the charsets to visually
// see what's happening
if (debug) {
for (var i = 0; i < charset.length; i++) {
var unicode = GlyphsUnicode[charset[i]];
if (!unicode)
error("Unicode for " + charset[i] + " is has not been found in the glyphs list");
testString += String.fromCharCode(unicode);
}
}
ctx.font = "bold italic 20px " + fontName + ", Symbol, Arial";
var textWidth = ctx.measureText(testString).width;
var header = [].concat(version,
FontsUtils.integerToBytes(numTables, 2),
FontsUtils.integerToBytes(searchRange, 2),
FontsUtils.integerToBytes(entrySelector, 2),
FontsUtils.integerToBytes(rangeShift, 2));
aFile.set(header, aOffsets.currentOffset);
aOffsets.currentOffset += header.length;
aOffsets.virtualOffset += header.length;
},
if (debug)
ctx.fillText(testString, 20, 20);
var start = Date.now();
var interval = window.setInterval(function canvasInterval(self) {
ctx.font = "bold italic 20px " + fontName + ", Symbol, Arial";
// For some reasons the font has not loaded, so mark it loaded for the
// page to proceed but cry
if ((Date.now() - start) >= kMaxWaitForFontFace) {
window.clearInterval(interval);
Fonts[fontName].loading = false;
warn("Is " + fontName + " for charset: " + charset + " loaded?");
} else if (textWidth != ctx.measureText(testString).width) {
window.clearInterval(interval);
Fonts[fontName].loading = false;
}
if (debug)
ctx.fillText(testString, 20, 50);
}, 50, this);
/** Hack end */
// Add the @font-face rule to the document
var url = "url(data:" + this.mimetype + ";base64," + dataBase64 + ");";
var rule = "@font-face { font-family:'" + fontName + "';src:" + url + "}";
var styleSheet = document.styleSheets[0];
styleSheet.insertRule(rule, styleSheet.length);
},
_createTableEntry: function font_createTableEntry(aFile, aOffsets, aTag, aData) {
// tag
var tag = [
aTag.charCodeAt(0),
aTag.charCodeAt(1),
aTag.charCodeAt(2),
aTag.charCodeAt(3)
];
_createOpenTypeHeader: function font_createOpenTypeHeader(aFile, aOffsets, aNumTables) {
// sfnt version (4 bytes)
var version = [0x4F, 0x54, 0x54, 0X4F];
// offset
var offset = aOffsets.virtualOffset;
// numTables (2 bytes)
var numTables = aNumTables;
// Per spec tables must be 4-bytes align so add some 0x00 if needed
while (aData.length & 3)
aData.push(0x00);
// searchRange (2 bytes)
var tablesMaxPower2 = FontsUtils.getMaxPower2(numTables);
var searchRange = tablesMaxPower2 * 16;
// length
var length = aData.length;
// entrySelector (2 bytes)
var entrySelector = Math.log(tablesMaxPower2) / Math.log(2);
// checksum
var checksum = FontsUtils.bytesToInteger(tag) + offset + length;
// rangeShift (2 bytes)
var rangeShift = numTables * 16 - searchRange;
var tableEntry = [].concat(tag,
FontsUtils.integerToBytes(checksum, 4),
FontsUtils.integerToBytes(offset, 4),
FontsUtils.integerToBytes(length, 4));
aFile.set(tableEntry, aOffsets.currentOffset);
aOffsets.currentOffset += tableEntry.length;
aOffsets.virtualOffset += aData.length;
},
var header = [].concat(version,
FontsUtils.integerToBytes(numTables, 2),
FontsUtils.integerToBytes(searchRange, 2),
FontsUtils.integerToBytes(entrySelector, 2),
FontsUtils.integerToBytes(rangeShift, 2));
aFile.set(header, aOffsets.currentOffset);
aOffsets.currentOffset += header.length;
aOffsets.virtualOffset += header.length;
},
_createCMAPTable: function font_createCMAPTable(aGlyphs) {
var characters = new Uint16Array(kMaxGlyphsCount);
for (var i = 0; i < aGlyphs.length; i++)
characters[aGlyphs[i].unicode] = i + 1;
_createTableEntry: function font_createTableEntry(aFile, aOffsets, aTag, aData) {
// tag
var tag = [
aTag.charCodeAt(0),
aTag.charCodeAt(1),
aTag.charCodeAt(2),
aTag.charCodeAt(3)
];
// offset
var offset = aOffsets.virtualOffset;
// Per spec tables must be 4-bytes align so add some 0x00 if needed
while (aData.length & 3)
aData.push(0x00);
// length
var length = aData.length;
// checksum
var checksum = FontsUtils.bytesToInteger(tag) + offset + length;
var tableEntry = [].concat(tag,
FontsUtils.integerToBytes(checksum, 4),
FontsUtils.integerToBytes(offset, 4),
FontsUtils.integerToBytes(length, 4));
aFile.set(tableEntry, aOffsets.currentOffset);
aOffsets.currentOffset += tableEntry.length;
aOffsets.virtualOffset += aData.length;
},
// Separate the glyphs into continuous range of codes, aka segment.
var ranges = [];
var range = [];
var count = characters.length;
for (var i = 0; i < count; i++) {
if (characters[i]) {
range.push(i);
} else if (range.length) {
ranges.push(range.slice());
range = [];
_createCMAPTable: function font_createCMAPTable(aGlyphs) {
var characters = new Uint16Array(kMaxGlyphsCount);
for (var i = 0; i < aGlyphs.length; i++)
characters[aGlyphs[i].unicode] = i + 1;
// Separate the glyphs into continuous range of codes, aka segment.
var ranges = [];
var range = [];
var count = characters.length;
for (var i = 0; i < count; i++) {
if (characters[i]) {
range.push(i);
} else if (range.length) {
ranges.push(range.slice());
range = [];
}
}
}
// The size in bytes of the header is equal to the size of the
// different fields * length of a short + (size of the 4 parallels arrays
// describing segments * length of a short).
var headerSize = (12 * 2 + (ranges.length * 4 * 2));
var segCount = ranges.length + 1;
var segCount2 = segCount * 2;
var searchRange = FontsUtils.getMaxPower2(segCount) * 2;
var searchEntry = Math.log(segCount) / Math.log(2);
var rangeShift = 2 * segCount - searchRange;
var cmap = [].concat(
[
0x00, 0x00, // version
0x00, 0x01, // numTables
0x00, 0x03, // platformID
0x00, 0x01, // encodingID
0x00, 0x00, 0x00, 0x0C, // start of the table record
0x00, 0x04 // format
],
FontsUtils.integerToBytes(headerSize, 2), // length
[0x00, 0x00], // language
FontsUtils.integerToBytes(segCount2, 2),
FontsUtils.integerToBytes(searchRange, 2),
FontsUtils.integerToBytes(searchEntry, 2),
FontsUtils.integerToBytes(rangeShift, 2)
);
// Fill up the 4 parallel arrays describing the segments.
var startCount = [];
var endCount = [];
var idDeltas = [];
var idRangeOffsets = [];
var glyphsIdsArray = [];
var bias = 0;
for (var i = 0; i < segCount - 1; i++) {
var range = ranges[i];
var start = FontsUtils.integerToBytes(range[0], 2);
var end = FontsUtils.integerToBytes(range[range.length - 1], 2);
var delta = FontsUtils.integerToBytes(((range[0] - 1) - bias) % 65536, 2);
bias += range.length;
// deltas are signed shorts
delta[0] ^= 0xFF;
delta[1] ^= 0xFF;
delta[1] += 1;
startCount.push(start[0], start[1]);
endCount.push(end[0], end[1]);
idDeltas.push(delta[0], delta[1]);
// The size in bytes of the header is equal to the size of the
// different fields * length of a short + (size of the 4 parallels arrays
// describing segments * length of a short).
var headerSize = (12 * 2 + (ranges.length * 4 * 2));
var segCount = ranges.length + 1;
var segCount2 = segCount * 2;
var searchRange = FontsUtils.getMaxPower2(segCount) * 2;
var searchEntry = Math.log(segCount) / Math.log(2);
var rangeShift = 2 * segCount - searchRange;
var cmap = [].concat(
[
0x00, 0x00, // version
0x00, 0x01, // numTables
0x00, 0x03, // platformID
0x00, 0x01, // encodingID
0x00, 0x00, 0x00, 0x0C, // start of the table record
0x00, 0x04 // format
],
FontsUtils.integerToBytes(headerSize, 2), // length
[0x00, 0x00], // language
FontsUtils.integerToBytes(segCount2, 2),
FontsUtils.integerToBytes(searchRange, 2),
FontsUtils.integerToBytes(searchEntry, 2),
FontsUtils.integerToBytes(rangeShift, 2)
);
// Fill up the 4 parallel arrays describing the segments.
var startCount = [];
var endCount = [];
var idDeltas = [];
var idRangeOffsets = [];
var glyphsIdsArray = [];
var bias = 0;
for (var i = 0; i < segCount - 1; i++) {
var range = ranges[i];
var start = FontsUtils.integerToBytes(range[0], 2);
var end = FontsUtils.integerToBytes(range[range.length - 1], 2);
var delta = FontsUtils.integerToBytes(((range[0] - 1) - bias) % 65536, 2);
bias += range.length;
// deltas are signed shorts
delta[0] ^= 0xFF;
delta[1] ^= 0xFF;
delta[1] += 1;
startCount.push(start[0], start[1]);
endCount.push(end[0], end[1]);
idDeltas.push(delta[0], delta[1]);
idRangeOffsets.push(0x00, 0x00);
for (var j = 0; j < range.length; j++)
glyphsIdsArray.push(range[j]);
}
startCount.push(0xFF, 0xFF);
endCount.push(0xFF, 0xFF);
idDeltas.push(0x00, 0x01);
idRangeOffsets.push(0x00, 0x00);
for (var j = 0; j < range.length; j++)
glyphsIdsArray.push(range[j]);
}
startCount.push(0xFF, 0xFF);
endCount.push(0xFF, 0xFF);
idDeltas.push(0x00, 0x01);
idRangeOffsets.push(0x00, 0x00);
return cmap.concat(endCount, [0x00, 0x00], startCount,
idDeltas, idRangeOffsets, glyphsIdsArray);
},
cover: function font_cover(aFont, aProperties) {
var otf = new Uint8Array(kMaxFontFileSize);
// Required Tables
var CFF = aFont.data, // PostScript Font Program
OS2 = [], // OS/2 and Windows Specific metrics
cmap = [], // Character to glyphs mapping
head = [], // Font eader
hhea = [], // Horizontal header
hmtx = [], // Horizontal metrics
maxp = [], // Maximum profile
name = [], // Naming tables
post = []; // PostScript informations
var tables = [CFF, OS2, cmap, head, hhea, hmtx, maxp, name, post];
// 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 offsets = {
currentOffset: 0,
virtualOffset: tables.length * (4 * 4)
};
// For files with only one font the offset table is the first thing of the
// file
this._createOpenTypeHeader(otf, offsets, tables.length);
// XXX It is probable that in a future we want to get rid of this glue
// between the CFF and the OTF format in order to be able to embed TrueType
// data.
this._createTableEntry(otf, offsets, "CFF ", CFF);
/** OS/2 */
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
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 0-31)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 32-63)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 64-95)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 96-127)
0x2A, 0x32, 0x31, 0x2A, // 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
];
this._createTableEntry(otf, offsets, "OS/2", OS2);
//XXX Getting charstrings here seems wrong since this is another CFF glue
var charstrings = aFont.getOrderedCharStrings(aProperties.glyphs);
/** CMAP */
cmap = this._createCMAPTable(charstrings);
this._createTableEntry(otf, offsets, "cmap", cmap);
/** HEAD */
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 (defaulting to 1000)
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // creation date
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // modifification date
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
];
this._createTableEntry(otf, offsets, "head", head);
return cmap.concat(endCount, [0x00, 0x00], startCount,
idDeltas, idRangeOffsets, glyphsIdsArray);
},
/** HHEA */
hhea = [].concat(
[
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
],
FontsUtils.integerToBytes(charstrings.length, 2) // numberOfHMetrics
);
this._createTableEntry(otf, offsets, "hhea", hhea);
/** HMTX */
hmtx = [0x01, 0xF4, 0x00, 0x00];
for (var i = 0; i < charstrings.length; i++) {
var charstring = charstrings[i].charstring;
var width = FontsUtils.integerToBytes(charstring[1], 2);
var lsb = FontsUtils.integerToBytes(charstring[0], 2);
hmtx = hmtx.concat(width, lsb);
}
this._createTableEntry(otf, offsets, "hmtx", hmtx);
cover: function font_cover(aFont, aProperties) {
var otf = new Uint8Array(kMaxFontFileSize);
// Required Tables
var CFF = aFont.data, // PostScript Font Program
OS2 = [], // OS/2 and Windows Specific metrics
cmap = [], // Character to glyphs mapping
head = [], // Font eader
hhea = [], // Horizontal header
hmtx = [], // Horizontal metrics
maxp = [], // Maximum profile
name = [], // Naming tables
post = []; // PostScript informations
var tables = [CFF, OS2, cmap, head, hhea, hmtx, maxp, name, post];
// 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 offsets = {
currentOffset: 0,
virtualOffset: tables.length * (4 * 4)
};
/** MAXP */
maxp = [].concat(
[
0x00, 0x00, 0x50, 0x00, // Version number
],
FontsUtils.integerToBytes(charstrings.length + 1, 2) // Num of glyphs (+1 to pass the sanitizer...)
);
this._createTableEntry(otf, offsets, "maxp", maxp);
/** NAME */
name = [
0x00, 0x00, // format
0x00, 0x00, // Number of names Record
0x00, 0x00 // Storage
];
this._createTableEntry(otf, offsets, "name", name);
/** POST */
// FIXME Get those informations from the FontInfo structure
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
];
this._createTableEntry(otf, offsets, "post", post);
// For files with only one font the offset table is the first thing of the
// file
this._createOpenTypeHeader(otf, offsets, tables.length);
// XXX It is probable that in a future we want to get rid of this glue
// between the CFF and the OTF format in order to be able to embed TrueType
// data.
this._createTableEntry(otf, offsets, "CFF ", CFF);
/** OS/2 */
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
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 0-31)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 32-63)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 64-95)
0xFF, 0xFF, 0xFF, 0xFF, // ulUnicodeRange1 (Bits 96-127)
0x2A, 0x32, 0x31, 0x2A, // 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
];
this._createTableEntry(otf, offsets, "OS/2", OS2);
//XXX Getting charstrings here seems wrong since this is another CFF glue
var charstrings = aFont.getOrderedCharStrings(aProperties.glyphs);
/** CMAP */
cmap = this._createCMAPTable(charstrings);
this._createTableEntry(otf, offsets, "cmap", cmap);
/** HEAD */
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 (defaulting to 1000)
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // creation date
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // modifification date
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
];
this._createTableEntry(otf, offsets, "head", head);
/** HHEA */
hhea = [].concat(
[
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
],
FontsUtils.integerToBytes(charstrings.length, 2) // numberOfHMetrics
);
this._createTableEntry(otf, offsets, "hhea", hhea);
/** HMTX */
hmtx = [0x01, 0xF4, 0x00, 0x00];
for (var i = 0; i < charstrings.length; i++) {
var charstring = charstrings[i].charstring;
var width = FontsUtils.integerToBytes(charstring[1], 2);
var lsb = FontsUtils.integerToBytes(charstring[0], 2);
hmtx = hmtx.concat(width, lsb);
}
this._createTableEntry(otf, offsets, "hmtx", hmtx);
/** MAXP */
maxp = [].concat(
[
0x00, 0x00, 0x50, 0x00, // Version number
],
FontsUtils.integerToBytes(charstrings.length + 1, 2) // Num of glyphs (+1 to pass the sanitizer...)
);
this._createTableEntry(otf, offsets, "maxp", maxp);
/** NAME */
name = [
0x00, 0x00, // format
0x00, 0x00, // Number of names Record
0x00, 0x00 // Storage
];
this._createTableEntry(otf, offsets, "name", name);
/** POST */
// FIXME Get those informations from the FontInfo structure
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
];
this._createTableEntry(otf, offsets, "post", post);
// Once all the table entries header are written, dump the data!
var tables = [CFF, OS2, cmap, head, hhea, hmtx, maxp, name, post];
for (var i = 0; i < tables.length; i++) {
var table = tables[i];
otf.set(table, offsets.currentOffset);
offsets.currentOffset += table.length;
}
// Once all the table entries header are written, dump the data!
var tables = [CFF, OS2, cmap, head, hhea, hmtx, maxp, name, post];
for (var i = 0; i < tables.length; i++) {
var table = tables[i];
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;
}
};
var fontData = [];
for (var i = 0; i < offsets.currentOffset; i++)
fontData.push(otf[i]);
return fontData;
}
};
return constructor;
})();
/**
* FontsUtils is a static class dedicated to hold codes that are not related

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