// SharpenFlou=ps_2_0
// Code by jim.ro
// http://www.homecinema-fr.com/forum/viewtopic.php?t=29814317 

sampler s0 : register(s0); 
float4 p0 : register(c0); 
float4 p1 : register(c1); 

#define width (p0[0]) 
#define height (p0[1]) 
#define counter (p0[2]) 
#define clock (p0[3]) 
#define one_over_width (p1[0]) 
#define one_over_height (p1[1]) 

#define PI acos(-1) 

float4 main( float2 tex : TEXCOORD0 ) : COLOR 
{ 
float dx = one_over_width; 
float dy = one_over_height; 

// recupperation de la matrice de 9 points 
//   [ 1, 2 , 3 ] 
//   [ 4,ori, 5 ] 
//   [ 6, 7 , 8 ] 

   float4 ori = tex2D(s0, tex); 
   float4 c1 = tex2D(s0, tex + float2(-dx,-dy)); 
   float4 c2 = tex2D(s0, tex + float2(0,-dy)); 
   float4 c3 = tex2D(s0, tex + float2(dx,-dy)); 
   float4 c4 = tex2D(s0, tex + float2(-dx,0)); 
   float4 c5 = tex2D(s0, tex + float2(dx,0)); 
   float4 c6 = tex2D(s0, tex + float2(-dx,dy)); 
   float4 c7 = tex2D(s0, tex + float2(0,dy)); 
   float4 c8 = tex2D(s0, tex + float2(dx,dy)); 

// calcul image floue (filtre gaussien) 
float  multipliers[9]= 
            {1,2,1, 
             2,4,2, 
             1,2,1}; 

float4 total=0; 
   total +=  c1 * multipliers[0]; 
   total +=  c2 * multipliers[1]; 
   total +=  c3 * multipliers[2]; 
   total +=  c4 * multipliers[3]; 
   total +=  ori * multipliers[4]; 
   total +=  c5 * multipliers[5]; 
   total +=  c6 * multipliers[6]; 
   total +=  c7 * multipliers[7]; 
   total +=  c8 * multipliers[8]; 

   // 1/(1+2+1+2+4+2+1+2+1) = 1/ 16 = .0625 
   total *= 0.0625f; 

// soustraction de l'image flou a l'image originale 
   total = 2*ori - total; 
//return ori; 
   return total; 
}