destination.copyPixels(source, rect, pt, null, origin, true); // copies pixels considering alpha
vs
destination.copyPixels(source, rect, pt); // copies all pixels
Note that i’m copying pixels to a destination bitmap which does not have an alpha channel, so it won’t necessarily merge alpha. But does it make a difference in that:
For the earlier case with alpha, could it be faster if Flash skips the copying of the pixel if it detects that the alpha channel value is zero? I’m not sure of the inner intricacies of how it’s being coded…
