Hello guys,
Right now i'm preparing a shader that contains glow, bloom and FXAA on a single pass. The problem is that i'm using one sample3D for a texture lookup in the glow part. and I don't know why, when I try to validate the shader it appears the error:
"Validation Error!, Different sampler types for same sample texture unit in fragment shader". here is a summary of the problematic part of the code:
#version 130
#extension GL_EXT_gpu_shader4 : enable
precision mediump float;
uniform vec2 vInvViewport;
uniform float fGlowMultiplier;
uniform int iDebug;
uniform sampler3D sourceLUT;
uniform sampler2D sourceTex;
uniform sampler2D sourceBloom;
uniform sampler2D sourceBlurData;
void main()
{
vec3 vColor;
if( iDebug == 0 )
{
vColor = FxaaPixelShader( gl_TexCoord[0].xy, sourceTex, vInvViewport );
}
else
{
vColor = texture2D( sourceTex, gl_TexCoord[0].xy ).rgb;
}
vec3 vBloom = texture2D( sourceBloom, gl_TexCoord[0].xy ).rgb;
vColor += fGlowMultiplier * vBloom;
vec4 vBlak = texture3D( sourceLUT, vColor.xyz ).xyzw;
float fBlik = texture2D( sourceBlurData, gl_TexCoord[0].xy ).x;
gl_FragColor = vec4( vBlak.xyz, fBlik );
}
If I comment the line 33, it works perfectly. So I dont know If I'm not using the function / variables in the proper way, or maybe its a driver confilct.
Does anyone have dealed with this issue before? 
.
My configuration is: Ubuntu 12.04, latest catalyst and ATI HD6870. I'm forcing the app to use OpenGL 2.1 with extensions when its possible to apply ^_^.
Thanks in advance people! 
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1 Solution
