[PD] problem with glsl shaders and texunits

Ben Baker-Smith bbakersmith at gmail.com
Mon Mar 8 00:48:13 CET 2010

Thanks for the help Cyrille and IOhannes, that's gotten me up the next step.


On Thu, Mar 4, 2010 at 9:39 AM, cyrille henry <ch at chnry.net> wrote:
> after a very quick look, i noticied that it work if you connect the right
> output of the framebuffer to the right input of the 2nd texture, in order to
> set the coordinate.
> i thought that Iohannes had recently made some change in order to improve
> this, but this patch is not working better than before.
> maybe because the texture is use not the texunit 0???
> Cyrille
> Ben Baker-Smith a écrit :
>> Hello,
>> I'm in over my head with glsl shaders right now. The attached patch is
>> a test I'm using to try and figure out how to properly use [texunit(
>> messages, but it only partially works. Instead of a clear image of me
>> in front of my webcam, I get a changing series of solid colors. It
>> responds to some rapid movements, so I know my video is making it to
>> the shader.
>> The shaders do nothing to alter the image, they are just there for
>> testing purposes. I've tested by running the video straight through
>> the shaders and it displays clear and normal, as expected.
>> I've read some things about the image size needing to be a power of 2,
>> not sure if that's related.
>> Thanks, this stuff is nuts!
>> -Ben
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