[GEM-dev] Guassian Blur pixel shader?

[chris clepper]

Got it.  The uniform was not being set properly in my patch.  Now I
get the blur, but linking is not always working the first time
through.

cgc

On 2/17/06, chris clepper <cgclepper at gmail.com> wrote:
> Some more info:
>
> There are three outlets for glsl_fragment and in these patches the
> middle one is connected to the shader number message for glsl_program.
>  That middle outlet never changes but the right one does.  I connected
> that up and now get varying output from the shader (although it still
> doesn't work):
>
> link 2 progs
> attach object 0
> attach object 1
> getting 722 chars for infolog
> GEM: [glsl_program]: Info_log:
> ERROR: Fragment shader reads varying 'texCoord0' which is not written
> since there is no vertex shader.
> ERROR: Fragment shader reads varying 'texCoord1' which is not written
> since there is no vertex shader.
> ERROR: Fragment shader reads varying 'texCoord2' which is not written
> since there is no vertex shader.
> ERROR: Fragment shader reads varying 'texCoord3' which is not written
> since there is no vertex shader.
> ERROR: Fragment shader reads varying 'texCoord4' which is not written
> since there is no vertex shader.
> ERROR: Fragment shader reads varying 'texCoord5' which is not written
> since there is no vertex shader.
> ERROR: Fragment shader reads varying 'texCoord6' which is not written
> since there is no vertex shader.
>
> GEM: [glsl_program]:  Link failed!
>
> After that I load the shaders again and get this:
>
> [glsl_vertex]: Loaded file: /Users/schwartz/Desktop/gaussBlurGLSL/gaussBlur.vert
> [glsl_fragment]: Loaded file:
> /Users/schwartz/Desktop/gaussBlurGLSL/gaussBlur.frag
> link 2 progs
> attach object 0
> attach object 1
> getting 0 chars for infolog
> [glsl_program]: vertex shader running in hardware
> [glsl_program]: fragment shader running in hardware
>
> I have a 256x256 file and pix_texture in mode 0.  Any ideas?
>
> cgc
>
> On 2/17/06, chris clepper <cgclepper at gmail.com> wrote:
> > No joy here.  It looks like the fragment shader is not loading properly:
> >
> > [glsl_fragment]: Loaded file:
> > /Users/schwartz/Desktop/gaussBlurGLSL/gaussBlur.frag
> > link 2 progs
> > attach object 0
> > attach object 1
> > getting 722 chars for infolog
> > GEM: [glsl_program]: Info_log:
> > WARNING: Vertex shader writes varying 'texCoord0' which is not read
> > since there is no fragment shader.
> > WARNING: Vertex shader writes varying 'texCoord1' which is not read
> > since there is no fragment shader.
> > WARNING: Vertex shader writes varying 'texCoord2' which is not read
> > since there is no fragment shader.
> > WARNING: Vertex shader writes varying 'texCoord3' which is not read
> > since there is no fragment shader.
> > WARNING: Vertex shader writes varying 'texCoord4' which is not read
> > since there is no fragment shader.
> > WARNING: Vertex shader writes varying 'texCoord5' which is not read
> > since there is no fragment shader.
> > WARNING: Vertex shader writes varying 'texCoord6' which is not read
> > since there is no fragment shader.
> >
> > [glsl_program]: vertex shader running in hardware
> > [glsl_program]: fragment shader running in hardware
> >
> > There's no ouput in the gemwin at all.
> >
> > The interface for GLSL in GEM is not exactly user friendly either.  I
> > wouldn't expect very many people to figure this out and get a shader
> > working in their own patches (myself included apparently).
> >
> > cgc
>