[GEM-dev] pbs with GEM on macpro quad

[cyrille henry]

hello,

chris clepper a écrit :
> On 4/18/07, cyrille henry <cyrille.henry at la-kitchen.fr> wrote:
>>
>>
>> yes, that does improve performances.
>> i hope using pix_movie + shader will be ok.
> 
> 


working with shader make strange things with texturing mode :
when i start a patch, i have to send a mode 0 to pix_texture in order to 
see anything. so, i can't work with pix_movie instead of pix_film when i 
use shader.

> So you can play 10 DV clips now? 

regarding the codec, i can have from 2 to 8 DV film on the same time 
(with shader / pix_film).
8 is not that bad, i think it will be ok.


> The shaders will work but performance can
> still be a problem.  Pixel shaders are far from 'free' operations.  A
> moderately complex shader applied to a few quads stretched to 1280x1024 or
> higher can be slow.  The more pixels your texture uses on screen the more
> work the shader has to do.  It is not fixed to the size of the texture you
> upload.

yes, this is obvius regarding the way pixel shader work. but i did not 
do complex operation (removing the sky from movies of clouds). (in fact, 
there is less computing in the processing i'm doing than computing 
complex lighting on a white square).


thanks a lot for your help.

cyrille


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