// GaussianBlur.fx 

// #######################
// ##### PARAMETERS #####

sampler TextureSampler : register(s0);

#define SAMPLE_COUNT 7

const float2 SampleOffsets[SAMPLE_COUNT] = 
{

	{0.000000, 0.000000},
	{0.002930, 0.000000},
	{-0.002930,0.000000},
	{0.006836, 0.000000},
	{-0.006836,0.000000},
	{0.010742, 0.000000},
	{-0.010742,0.000000}
};

float SampleWeights[SAMPLE_COUNT] = 
	{0.160949,  0.155997,  0.155997, 0.142037, 0.142037,0.121491, 0.121491};


// #######################
// ##### PIXELSHADER #####

float4 PixelShader(float2 texCoord : TEXCOORD0) : COLOR0
{
    float4 c = 0;
    
    // Combine a number of weighted image filter taps.
    for (int i = 0; i < SAMPLE_COUNT; i++)
    {
        c += tex2D(TextureSampler, texCoord + SampleOffsets[i]) * SampleWeights[i];
    }
    
    return c;
}

// #######################
// ##### TECHNIQUES ######

technique GaussianBlur
{
    pass Pass1
    {
        PixelShader = compile ps_2_0 PixelShader();
    }
}