// Pixel shader input structure
struct PS_INPUT
{
    float4 Position   : POSITION;
    float2 Texture    : TEXCOORD0;
};

// Pixel shader output structure
struct PS_OUTPUT
{
    float4 Color   : COLOR0;
};

// Global variables
sampler2D Tex0;
float fCoeff;

PS_OUTPUT ps_main( in PS_INPUT In )
{
    // Output pixel
    PS_OUTPUT Out;
	
    PS_OUTPUT TexT;
    PS_OUTPUT TexTL;
    PS_OUTPUT TexL;
    PS_OUTPUT TexBL;
    PS_OUTPUT TexB;
    PS_OUTPUT TexBR;
    PS_OUTPUT TexR;
    PS_OUTPUT TexTR;
	TexT.Color = tex2D(Tex0, float2(In.Texture.x,In.Texture.y-fCoeff));
	TexTL.Color = tex2D(Tex0, float2(In.Texture.x-fCoeff,In.Texture.y-fCoeff));
	TexL.Color = tex2D(Tex0, float2(In.Texture.x-fCoeff,In.Texture.y));
	TexBL.Color = tex2D(Tex0, float2(In.Texture.x-fCoeff,In.Texture.y+fCoeff));
	TexB.Color = tex2D(Tex0, float2(In.Texture.x,In.Texture.y+fCoeff));
	TexBR.Color = tex2D(Tex0, float2(In.Texture.x+fCoeff,In.Texture.y+fCoeff));
	TexR.Color = tex2D(Tex0, float2(In.Texture.x+fCoeff,In.Texture.y));
	TexTR.Color = tex2D(Tex0, float2(In.Texture.x+fCoeff,In.Texture.y-fCoeff));
	Out.Color = tex2D(Tex0, float2(In.Texture.x,In.Texture.y));
	
	Out.Color = (Out.Color+TexT.Color+TexTL.Color+TexL.Color+TexBL.Color+TexB.Color+TexBR.Color+TexR.Color+TexTR.Color)/9;
	
    return Out;
}

// Effect technique
technique tech_main
{
    pass P0
    {
        // shaders
        VertexShader = NULL;
        PixelShader  = compile ps_2_0 ps_main();
    }  
}