Roman Haefeli a écrit :
On Fri, 2008-10-17 at 18:25 +0200, 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
it doesn't seem to work on my box. no matter, what shader i load, the texture looks the same. when i click on one of the shader loaders, i get the following messages:
[pix_texture]: using mode 0: TEXTURE_2D linking: link 5.60519e-45 4.2039e-45 linking: link 5.60519e-45 7.00649e-45
and
[pix_texture]: using mode 1: TEXTURE_RECTANGLE linking: link 2.8026e-45 7.00649e-45 linking: link 2.8026e-45 4.2039e-45
no change in the picture whatsoever.
both shader are doing the same. i.e : almost nothing! the images should only be a little bit darker than without the shader.
also the ID number is out of the range in order to be represented properly:
2.8026e-45
it's not displaying correctly, but it is computed correctly.
i remember there was a discussion once about this on the gem-dev list. is there a fix for that?
yes, there was a bug there, but it was corrected. the value you have show that it's working.
i am on ubuntu hardy with an nvidia Quadro NVS 140M and i very much hoped, that i have now opengl 2.x. glxinfo:
OpenGL version string: 2.1.2 NVIDIA 169.12
do you think, shader stuff is supposed to work on my box? if so, what can i do to make it work?
i'm no specialist in nvidia card, but it look like it's shader compliant.
everything else look good, so i suspect it is working. if you change color = color * 0.5; with : color = color * 0.1; and reload the shader, the images should be darker. (change in texture.frag)
could you also try the other examples?
Cyrille
thanks roman
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