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Use transfer function within copy, if set.

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This commit is contained in:
Michael Jumper
2012-02-27 11:35:02 -08:00
parent 7011f650c5
commit 6bfa0d7ea1
1 changed files with 23 additions and 2 deletions
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25
guacamole-common-js/src/main/resources/layer.js
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@@ -458,8 +458,29 @@ Guacamole.Layer = function(width, height) {
if (layer.autosize != 0) fitRect(x, y, srcw, srch);
var srcCanvas = srcLayer.getCanvas();
if (srcCanvas.width != 0 && srcCanvas.height != 0)
displayContext.drawImage(srcCanvas, srcx, srcy, srcw, srch, x, y, srcw, srch);
if (srcCanvas.width != 0 && srcCanvas.height != 0) {
// Just copy if no transfer function
if (!transferFunction)
displayContext.drawImage(srcCanvas, srcx, srcy, srcw, srch, x, y, srcw, srch);
// Otherwise, copy via transfer function
else {
// Get image data from src and dst
var src = srcLayer.getCanvas().getContext("2d").getImageData(srcx, srcy, srcw, srch);
var dst = displayContext.getImageData(x , y, srcw, srch);
// Apply transfer for each pixel
for (var i=0; i<srcw*srch*4; i+=4) {
dst.data[i ] = transferFunction(src.data[i ], dst.data[i ]);
dst.data[i+1] = transferFunction(src.data[i+1], dst.data[i+1]);
dst.data[i+2] = transferFunction(src.data[i+2], dst.data[i+2]);
dst.data[i+3] = 0xFF; // Assume output opaque
}
}
}
// Unblock the source layer now that draw is complete
if (srcLock != null)