Hm... yes, it looks like you could do a real gaussian blur in hardware using a similar technique to the flawed one I used. You would have to choose window sizes which are powers of 2 though. So you could do a 2 pixel box/cubic/gaussian, or a 4 or an 8... But not a 5 or 6. The greater the window size however, the more color accuracy you will lose. I am not sure if this would affect the quality of the resulting blur or not.
fastest HDR Filter
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