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Merge pull request #1971 from yurydelendik/issue-1970

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Using fast pixels copy in putBinaryImageData
This commit is contained in:
Artur Adib 2012-08-10 11:40:12 -07:00
commit 6ccf711966
1 changed files with 9 additions and 6 deletions
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15
src/canvas.js
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@ -1279,14 +1279,17 @@ function checkPutBinaryImageDataCompatibility() {
} catch (e) { } catch (e) {
CanvasGraphics.prototype.putBinaryImageData = CanvasGraphics.prototype.putBinaryImageData =
function CanvasGraphicsPutBinaryImageDataShim(ctx, imgData, w, h) { function CanvasGraphicsPutBinaryImageDataShim(ctx, imgData, w, h) {
var tmpImgData = ctx.getImageData(0, 0, w, h); var tmpImgData = 'createImageData' in ctx ? ctx.createImageData(w, h) :
ctx.getImageData(0, 0, w, h);
// Copy over the imageData pixel by pixel.
var tmpImgDataPixels = tmpImgData.data; var tmpImgDataPixels = tmpImgData.data;
var len = tmpImgDataPixels.length; var data = imgData.data;
if ('set' in tmpImgDataPixels)
while (len--) { tmpImgDataPixels.set(data);
tmpImgDataPixels[len] = imgData.data[len]; else {
// Copy over the imageData pixel by pixel.
for (var i = 0, ii = tmpImgDataPixels.length; i < ii; i++)
tmpImgDataPixels[i] = data[i];
} }
ctx.putImageData(tmpImgData, 0, 0); ctx.putImageData(tmpImgData, 0, 0);