using floating point textures in ofShader

advanced
#1

I’m having trouble using a floating point texture in ofShader. It may be that I’m just having trouble with floating point textures/Fbo’s in general. See the following code for how I am trying to use it:

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_[b]h:_
----------------------------------------------------------------[/b]

  
  
ofShader _Shader;  
ofFbo floatingPointFbo;

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_[b]cpp:_
----------------------------------------------------------------[/b]

  
  
//----------------------------------------------  
  
void shaderTest::init(int w,int h){  
     _Shader.load("shaders/blablabla.vert","shaders/blablabla.frag");  
     floatingPointFbo.allocate(w, h, GL_FLOAT);  
}  
  
//----------------------------------------------  
  
void shaderTest::runShader(){  
     floatingPointFbo.begin();  
          _Shader.begin();  
               _Shader.setUniformTexture("floatTex",floatingPointFbo.getTextureReference(),1);  
               otherTexture.draw(0,0);  
          _Shader.end();  
     floatingPointFbo.end();  
}  
//----------------------------------------------  
  
void shaderTest::draw(int x, int y){  
     _shader.draw(x,y);  
}  
//----------------------------------------------

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_[b]frag:_
----------------------------------------------------------------[/b]

  
  
#extension GL_ARB_texture_rectangle : enable  
  
uniform sampler2DRect tex;  
uniform sampler2DRect floatTex;  
  
void main(void) {  
    do image processing stuff here  
}
#2

ok, solved the problem. I was allocating the wrong GL internal format for the texture. It should have been as follows:

  
  
bgDataTex.allocate(w, h, GL_RGBA32F);