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Support non-BMP characters contained in embedded fonts

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This commit is contained in:
vyv03354 2013-02-05 06:20:33 +09:00
parent 3699c311bb
commit 521723a9b5
1 changed files with 68 additions and 6 deletions
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74
src/fonts.js
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@ -2568,6 +2568,7 @@ var Font = (function FontClosure() {
codeIndices.push(codes[n].code);
++end;
++n;
if (end === 0x10000) { break; }
}
ranges.push([start, end, codeIndices]);
}
@ -2578,15 +2579,20 @@ var Font = (function FontClosure() {
function createCmapTable(glyphs, deltas) {
var ranges = getRanges(glyphs);
var numTables = 1;
var numTables = ranges[ranges.length - 1][1] > 0xFFFF ? 2 : 1;
var cmap = '\x00\x00' + // version
string16(numTables) + // numTables
'\x00\x03' + // platformID
'\x00\x01' + // encodingID
string32(4 + numTables * 8); // start of the table record
var trailingRangesCount = ranges[ranges.length - 1][1] < 0xFFFF ? 1 : 0;
var segCount = ranges.length + trailingRangesCount;
for (var i = ranges.length - 1; i >= 0; --i) {
if (ranges[i][0] <= 0xFFFF) { break; }
}
var bmpLength = i + 1;
var trailingRangesCount = ranges[bmpLength - 1][1] < 0xFFFF ? 1 : 0;
var segCount = bmpLength + trailingRangesCount;
var segCount2 = segCount * 2;
var searchRange = getMaxPower2(segCount) * 2;
var searchEntry = Math.log(segCount) / Math.log(2);
@ -2601,7 +2607,7 @@ var Font = (function FontClosure() {
var bias = 0;
if (deltas) {
for (var i = 0, ii = ranges.length; i < ii; i++) {
for (var i = 0, ii = bmpLength; i < ii; i++) {
var range = ranges[i];
var start = range[0];
var end = range[1];
@ -2618,7 +2624,7 @@ var Font = (function FontClosure() {
glyphsIds += string16(deltas[codes[j]]);
}
} else {
for (var i = 0, ii = ranges.length; i < ii; i++) {
for (var i = 0, ii = bmpLength; i < ii; i++) {
var range = ranges[i];
var start = range[0];
var end = range[1];
@ -2646,10 +2652,66 @@ var Font = (function FontClosure() {
endCount + '\x00\x00' + startCount +
idDeltas + idRangeOffsets + glyphsIds;
var format31012 = '';
var header31012 = '';
if (numTables > 1) {
cmap += '\x00\x03' + // platformID
'\x00\x0A' + // encodingID
string32(4 + numTables * 8 +
4 + format314.length); // start of the table record
format31012 = '';
if (deltas) {
for (var i = 0, ii = ranges.length; i < ii; i++) {
var range = ranges[i];
var start = range[0];
var codes = range[2];
var code = deltas[codes[0]];
for (var j = 1, jj = codes.length; j < jj; ++j) {
if (deltas[codes[j]] !== deltas[codes[j - 1]] + 1) {
var end = range[0] + j - 1;
format31012 += string32(start) + // startCharCode
string32(end) + // endCharCode
string32(code); // startGlyphID
start = end + 1;
code = deltas[codes[j]];
}
}
format31012 += string32(start) + // startCharCode
string32(range[1]) + // endCharCode
string32(code); // startGlyphID
}
} else {
for (var i = 0, ii = ranges.length; i < ii; i++) {
var range = ranges[i];
var start = range[0];
var codes = range[2];
var code = codes[0];
for (var j = 1, jj = codes.length; j < jj; ++j) {
if (codes[j] !== codes[j - 1] + 1) {
var end = range[0] + j - 1;
format31012 += string32(start) + // startCharCode
string32(end) + // endCharCode
string32(code); // startGlyphID
start = end + 1;
code = codes[j];
}
}
format31012 += string32(start) + // startCharCode
string32(range[1]) + // endCharCode
string32(code); // startGlyphID
}
}
header31012 = '\x00\x0C' + // format
'\x00\x00' + // reserved
string32(format31012.length + 16) + // length
'\x00\x00\x00\x00' + // language
string32(format31012.length / 12); // nGroups
}
return stringToArray(cmap +
'\x00\x04' + // format
string16(format314.length + 4) + // length
format314);
format314 + header31012 + format31012);
}
function validateOS2Table(os2) {