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Revision 0d81d0fb

Added by Leszek Koltunski over 7 years ago

Separable Box blur (almost) works.

View differences:

src/main/res/raw/blur_fragment_shader.glsl
21 21 

  		




  22
  22
  
    
varying vec2 v_TexCoordinate;


  		




  23
  23
  
    
uniform sampler2D u_Texture;


  		




  24
  
  
    
uniform vec2 one_over_objD;


  		




  25
  
  
    
uniform float u_Radius;


  		




  
  24
  
    
uniform float u_Step;


  		




  
  25
  
    
uniform float u_Weights[MAX_BLUR];


  		




  
  26
  
    
uniform int u_Radius;


  		




  26
  27
  
    

  		




  27
  28
  
    
//////////////////////////////////////////////////////////////////////////////////////////////


  		




  28
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  29
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void main()


  		




  30
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  {


  		




  31
  
  
    
  vec2 tex;


  		




  32
  
  
    
  vec4 pixel = vec4(0.0);


  		




  33
  
  
    
  float denom = 1.0 / ((2.0*u_Radius+1.0)*(2.0*u_Radius+1.0));


  		




  
  32
  
    
  float lCoord = v_TexCoordinate.x;


  		




  
  33
  
    
  float rCoord = lCoord;


  		




  
  34
  
    
  float yCoord = v_TexCoordinate.y;


  		




  34
  35
  
    

  		




  35
  
  
    
  for (float x = -u_Radius; x <= u_Radius; x+=1.0)


  		




  36
  
  
    
    for (float y = -u_Radius; y <= u_Radius; y+=1.0)


  		




  37
  
  
    
      {


  		




  38
  
  
    
      tex = vec2(v_TexCoordinate.x + x*one_over_objD.x, v_TexCoordinate.y + y*one_over_objD.y);


  		




  39
  
  
    
      pixel += texture2D(u_Texture,tex)*denom;


  		




  40
  
  
    
      }


  		




  
  36
  
    
  vec4  pixel  = texture2D(u_Texture,vec2(lCoord,yCoord)) * u_Weights[0];


  		




  
  37
  
    

  		




  
  38
  
    
  for (int x = 1; x <= u_Radius; x+=1)


  		




  
  39
  
    
    {


  		




  
  40
  
    
    rCoord+= u_Step;


  		




  
  41
  
    
    lCoord-= u_Step;


  		




  
  42
  
    
    pixel += ( texture2D(u_Texture,vec2(rCoord,yCoord)) +


  		




  
  43
  
    
               texture2D(u_Texture,vec2(lCoord,yCoord)) ) * u_Weights[x];


  		




  
  44
  
    
    }


  		




  41
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  42
  46
  
    
  gl_FragColor = pixel;


  		




  43
  47
  
    
  }


  		












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