[PD-dev] [GEM] pix_convolve

[guenter geiger]

I thought I had written a specific 3x3 function and changed pix_convolve
to integer. Had thought this got into to CVS :(

Anyhow, you will definitely gain a lot with these optimizations.

Greetings,
Guenter

On Sat, 1 Mar 2003, chris clepper wrote:

> hi
>
> i had a look at pix_convolve over the past two days, and i just
> committed my changes:
>
> - yuv support added
> - massive speed improvement by using integer processing (at least 2x
> but 5x in some cases)
> - removed the range divide (only added insult to the injury)
> - yuv function has option to discard chroma for accurate edge-detection
> - added an #ifdef so RGB works properly on OSX
>
> i'm going to write a 3x3 specific function this weekend and see what
> sort of optimizations can be done with using greater number of
> registers, unrolled loops, etc.  i'll give altivec a shot too.  maybe
> at that point it will be useful to write abstractions based on
> pix_convolve.  now, at least it's somewhat usable on machines
> available today.
>
> cgc
>
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