[cairo] Re: [Mesa3d-dev] Points in Cairo Glitz paper

Vladimir Vukicevic vladimir at pobox.com
Sun Apr 25 20:44:35 PDT 2004

David Reveman wrote:
> On Sun, 2004-04-25 at 11:01 -0600, Marcelo E. Magallon wrote:
>> I didn't take a closer look at the convolution operation and I'm not
>> sure if the imaging extensions are capable of providing equal
>> functionality.
> I've actually tried using the imaging extensions for convolution
> filtering but it turned out terribly slow. 

Some time ago, a friend was doing some work with the imaging extensions. 
  It turned out that neither nVidia nor ATI make any real attempts to 
optimize/accelerate them -- the majority of operations are terribly slow 
under both linux and win32.  It's probably not worth depending on 
ARB_imaging for much of anything, though I'm not sure if representing 
operations using ARB_imaging would help Mesa accelerate those operations 
(hand tailored assembly, etc.).

	- Vlad

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