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- // EdgeSharpen v1.1=ps_2_0
- // 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)
-
- #define Edge_width 2.0
- #define Edge_threshold 0.2
-
- #define Sharpen_width 1.2
- #define Sharpen_val0 2.0
- #define Sharpen_val1 0.125
-
- float4 main(float2 tex : TEXCOORD0) : COLOR
- {
- // Read current pixel color
- float4 Res = tex2D( s0, tex );
-
- // Edge detection width vector
- float dx = Edge_width / height;
- float dy = Edge_width / width;
-
- // Read corners color
- float4 c2 = tex2D(s0, tex + float2( 0,-dy) );
- float4 c3 = tex2D(s0, tex + float2(-dx,0) );
- float4 c4 = tex2D(s0, tex + float2( dx,0) );
- float4 c5 = tex2D(s0, tex + float2( 0, dy) );
-
- // Compute vector lenght
- float4 c0 = Res*4 - c2 - c3 - c4 - c5;
-
- // If vector lenght > Edge_threshold : sharp this pixel
- if( length(c0) > Edge_threshold )
- {
- // Compute sharpen's width vector
- dx = Sharpen_width / width;
- dy = Sharpen_width / height;
-
- // Read 8 around pixels color
- float4 c1 = tex2D(s0, tex + float2(-dx,-dy)) ;
- c2 = tex2D(s0, tex + float2(0,-dy)) ;
- c3 = tex2D(s0, tex + float2(-dx,0)) ;
- c4 = tex2D(s0, tex + float2(dx,0));
- c5 = tex2D(s0, tex + float2(0,dy)) ;
- float4 c6 = tex2D(s0, tex + float2(dx,dy)) ;
- float4 c7 = tex2D(s0, tex + float2(-dx,+dy));
- float4 c8 = tex2D(s0, tex + float2(+dx,-dy)) ;
-
- float4 c9 =Res * Sharpen_val0;
-
- Res = c9 - (c1 + c2 + c3 + c4 + c5 + c6 + c7 + c8 ) * Sharpen_val1 ;
-
- // Uncomment next line to see detected Edges in red ...
- //Res = float4( 1.0, 0.0, 0.0, 0.0 );
-
- }
-
- return Res;
- }