Re: [Algorithms] Blurring in HLSL

[Steve L. <sm...@go...>]

> Hi All,
> 
> Thanks for all the help you people have given me in the past.
> 
> A question about blurring.
> I want to do a soft blur in HLSL. Preferably in one-pass.
> I've read lots of stuff but I want to know if anyone has managed to
> come
> up with a solution that works in one-pass and achieves a soft blur, AND
> is fast.
> 
> Any help much appreciated.
> 
> Cheers
> Zafar Qamar

Its generally quicker to do a two-pass Gaussian blur (the Gaussian kernel is separable so you can reduce the number of texture samples from N^2 to 2*N by doing two passes, one horizontal and one vertical.  I believe this also keeps it on topic since this is an algorithmic optimisation ;)

Thanks,
Steve.