[dsd]

простенький блюр

float4 downsample(float2 texCoords : TEXCOORD0) : COLOR
{

   float2 texCoordSample =float2(0.0f,0.0f);
   float3 cOut;
   
   float2 pixelSize =float2( 1.0f/1024, 1.0f/768 );
   texCoordSample.x = texCoords.x - pixelSize.x;
   texCoordSample.y = texCoords.y + pixelSize.y;
   cOut = tex2D(sceneSample, texCoordSample).rgb;
   
   texCoordSample.x = texCoords.x + pixelSize.x;
   texCoordSample.y = texCoords.y + pixelSize.y;
   cOut += tex2D(sceneSample, texCoordSample).rgb;
   
   texCoordSample.x = texCoords.x + pixelSize.x;
   texCoordSample.y = texCoords.y - pixelSize.y;
   cOut += tex2D(sceneSample, texCoordSample).rgb;
   
   texCoordSample.x = texCoords.x - pixelSize.x;
   texCoordSample.y = texCoords.y - pixelSize.y;
   cOut += tex2D(sceneSample, texCoordSample).rgb;
	return float4(0.25*cOut,1.0);
}

float4 gaussian(float2 texCoords : TEXCOORD0) : COLOR
{


   float2 texCoordSample =float2(0.0f,0.0f);
   float3 cOut;
   
   float2 pixelSize =4*float2( 1.0f/1024, 1.0f/768 );
   texCoordSample.x = texCoords.x;
   texCoordSample.y = texCoords.y;
   cOut = 0.5*tex2D(sceneSample, texCoords).rgb;
   
   texCoordSample.x = texCoords.x;
   texCoordSample.y = texCoords.y + pixelSize.y;
   cOut += 0.125*tex2D(sceneSample, texCoordSample).rgb;
   
   texCoordSample.x = texCoords.x;
   texCoordSample.y = texCoords.y - pixelSize.y;
   cOut += 0.125*tex2D(sceneSample, texCoordSample).rgb;
   
   texCoordSample.x = texCoords.x - pixelSize.x;
   texCoordSample.y = texCoords.y;
   cOut += 0.125*tex2D(sceneSample, texCoordSample).rgb;
   
   texCoordSample.x = texCoords.x - pixelSize.x;
   texCoordSample.y = texCoords.y;
   cOut += 0.125*tex2D(sceneSample, texCoordSample).rgb;
	return float4(cOut,1.0);
}