[PD] pix_contrast eats up cpu power

[olsen]

hep cyrille
thanks for this hint - though it's my first time using shader - i 
tweaked around a bit with the example. i changed color saturation 
towards muchocolore in the texture.frag file. although removing color to 
get a black & white image i'm also loosing opacity f.e. with color = 
color* 0.1; the image gets almost black.
where aside the green behind my ears can i find infos about how to 
handle the shader?
thanks&salutis
olsen

cyrille henry wrote:
> use shader!
> you'll have to make your own shader, but adjusting color saturation is 
> quite easy.
> see gem documentation/10.glsl/01.simple_texture
> 
> cyrille
> 
> 
> olsen a écrit :
>> hi
>> roman & me are working on an videoinstallation using gem - only an 
>> additional [pix_contrast] in the gem chain hits the processing limit 
>> of our computer - is there a way to adjust color saturation in the gpu 
>> instead of the cpu in Gem?
>> thanks&greets
>> olsen
>>
>>
>>
>>
>>

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