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Merge pull request #4959 from nnethercote/zero-cache-canvases

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Zero the height and width of cached canvases before deleting them.
This commit is contained in:
Yury Delendik 2014-06-17 08:26:04 -05:00
commit 11302f09a4
1 changed files with 8 additions and 1 deletions
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9
src/display/canvas.js
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@ -179,7 +179,14 @@ var CachedCanvases = (function CachedCanvasesClosure() {
return canvasEntry;
},
clear: function () {
cache = {};
for (var id in cache) {
var canvasEntry = cache[id];
// Zeroing the width and height causes Firefox to release graphics
// resources immediately, which can greatly reduce memory consumption.
canvasEntry.canvas.width = 0;
canvasEntry.canvas.height = 0;
delete cache[id];
}
}
};
})();