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Merge pull request #5219 from Snuffleupagus/sanitizeMetrics-avoid-intermediate-strings

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Avoid creating intermediate strings in sanitizeMetrics
This commit is contained in:
Yury Delendik 2014-08-21 08:05:44 -05:00
commit 4834f1c289
1 changed files with 5 additions and 9 deletions
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14
src/core/fonts.js
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@ -3297,16 +3297,12 @@ var Font = (function FontClosure() {
var numMissing = numOfSidebearings -
((metrics.length - numOfMetrics * 4) >> 1);
var i, ii;
if (numMissing > 0) {
font.pos = (font.start ? font.start : 0) + metrics.offset;
var entries = '';
for (i = 0, ii = metrics.length; i < ii; i++) {
entries += String.fromCharCode(font.getByte());
}
for (i = 0; i < numMissing; i++) {
entries += '\x00\x00';
}
// For each missing glyph, we set both the width and lsb to 0 (zero).
// Since we need to add two properties for each glyph, this explains
// the use of |numMissing * 2| when initializing the typed array.
var entries = new Uint8Array(metrics.length + numMissing * 2);
entries.set(metrics.data);
metrics.data = entries;
}
}