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Clean up a bit the CMAP ranges creation loop

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This commit is contained in:
Vivien Nicolas 2011-06-13 03:45:24 +02:00
parent 65b8158c34
commit cebdda3f35
1 changed files with 9 additions and 10 deletions
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19
PDFFont.js
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@ -6,6 +6,11 @@
*/
var kMaxFontFileSize = 40000;
/**
* Maximum number of glyphs per font.
*/
var kMaxGlyphsCount = 1024;
/**
* Hold a map of decoded fonts and of the standard fourteen Type1 fonts and
@ -143,28 +148,22 @@ Font.prototype = {
},
_createCMAPTable: function font_createCMAPTable(aGlyphs) {
var data = new Array(1000);
var characters = new Array(kMaxGlyphsCount);
for (var i = 0; i < aGlyphs.length; i++)
data[aGlyphs[i].unicode] = i + 1;
characters[aGlyphs[i].unicode] = i + 1;
// Separate the glyphs into continuous range of codes, aka segment.
var ranges = [];
var range = [];
for (var i = 0; i < data.length; i++) {
var char = data[i];
if (char) {
for (var i = 0; i < characters.length; i++) {
if (characters[i]) {
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 = [];
}
}
// 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).