diff --git a/fonts.js b/fonts.js index 3bc71e683..2ee8a0d3c 100644 --- a/fonts.js +++ b/fonts.js @@ -241,88 +241,6 @@ var Font = (function () { styleSheet.insertRule(rule, styleSheet.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; - - // 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]); - 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); - }, - convert: function font_convert(aFont, aProperties) { var otf = new Uint8Array(kMaxFontFileSize); @@ -392,6 +310,88 @@ var Font = (function () { aOffsets.currentOffset += tableEntry.length; aOffsets.virtualOffset += aData.length; } + + function 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]); + 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); + } // Required Tables var CFF = aFont.data, // PostScript Font Program @@ -469,7 +469,7 @@ var Font = (function () { var charstrings = aFont.getOrderedCharStrings(aProperties.glyphs); /** CMAP */ - cmap = this._createCMAPTable(charstrings); + cmap = createCMAPTable(charstrings); createTableEntry(otf, offsets, "cmap", cmap); /** HEAD */