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Merge pull request #2875 from vyv03354/tounicode

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Convert CID fonts using "ToUnicode" CMap if available
This commit is contained in:
Yury Delendik 2013-03-03 12:04:42 -08:00
commit 4c061cdbf4
3 changed files with 22 additions and 6 deletions
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19
src/fonts.js
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@ -2401,7 +2401,7 @@ var Font = (function FontClosure() {
this.defaultVMetrics = properties.defaultVMetrics;
}
if (properties.toUnicode)
if (properties.toUnicode && properties.toUnicode.length > 0)
this.toUnicode = properties.toUnicode;
else
this.rebuildToUnicode(properties);
@ -4331,12 +4331,12 @@ var Font = (function FontClosure() {
rebuildToUnicode: function Font_rebuildToUnicode(properties) {
var firstChar = properties.firstChar, lastChar = properties.lastChar;
var map = [];
if (properties.composite) {
var isIdentityMap = this.cidToUnicode.length === 0;
var toUnicode = this.toUnicode || this.cidToUnicode;
if (toUnicode) {
var isIdentityMap = toUnicode.length === 0;
for (var i = firstChar, ii = lastChar; i <= ii; i++) {
// TODO missing map the character according font's CMap
var cid = i;
map[i] = isIdentityMap ? cid : this.cidToUnicode[cid];
map[i] = isIdentityMap ? i : toUnicode[i];
}
} else {
for (var i = firstChar, ii = lastChar; i <= ii; i++) {
@ -4358,6 +4358,14 @@ var Font = (function FontClosure() {
this.cidToUnicode = cidToUnicodeMap;
this.unicodeToCID = unicodeToCIDMap;
var cidEncoding = properties.cidEncoding;
if (properties.toUnicode) {
if (cidEncoding && cidEncoding.indexOf('Identity-') !== 0) {
TODO('Need to create a reverse mapping from \'ToUnicode\' CMap');
}
return; // 'ToUnicode' CMap will be used
}
var cidSystemInfo = properties.cidSystemInfo;
var cidToUnicode;
if (cidSystemInfo) {
@ -4368,7 +4376,6 @@ var Font = (function FontClosure() {
if (!cidToUnicode)
return; // identity encoding
var cidEncoding = properties.cidEncoding;
var overwrite = HalfwidthCMaps[cidEncoding];
var cid = 1, i, j, k, ii;
for (i = 0, ii = cidToUnicode.length; i < ii; ++i) {