Re: [Algorithms] Blurring in HLSL

[Oscar F. <os...@tr...>]

What sort of blur do you want? (ie full screen?) What sort of kernel do you
want to use? (ie Gaussian?)
What sort of hardware are you targetting?

I'd be very surprised, though, if you could beat a 2 pass (horizontal then
vertical) blur though.  To do the equivalent in a single pass would require
a stupid amount of samples.  The 2 pass 7 tap per pass gaussian blur (ie 14
samples and 2 writes per pixel) would require 49 samples and 1 write per
pixel to do in a single pass.  I'd be very surprised if you could get an
equivalent blur for the same cost as doing 2 passes.

I'll be very interested if some can show me an equivalently good single pass
method, but I doubt they will ...

Oscar

2009/6/16 Zafar Qamar <zaf...@co...>

> 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
>
>
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