uniform samplerRECT samp0 : register(s0);
uniform samplerRECT samp1;

float4 brightPass(float2 uv0){

  float luminance = 0.13;
  float fMiddleGray = 0.14;
  float fWhiteCutOff = 0.70;

  float4 bp = texRECT(samp0, uv0);
  bp *= fMiddleGray / (luminance + 0.001);
  bp *= (1.0 + (bp / (fWhiteCutOff * fWhiteCutOff)));
  bp -= 0.0;

  return bp;

}

void main(out float4 ocol0 : COLOR0, in float2 uv0 : TEXCOORD0){

  float4 original = texRECT(samp0, uv0);
  float blurSize = 2.0;

  // blurring
  float4 blur = float4(0.0, 0.0, 0.0, 0.0);

  blur+= brightPass(uv0 + float2(0.0 * blurSize, 0.0 * blurSize)) * 256.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, 0.0 * blurSize)) * 240.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, 0.0 * blurSize)) * 192.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, 0.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, 0.0 * blurSize)) * 80.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, 0.0 * blurSize)) * 240.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, 0.0 * blurSize)) * 192.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, 0.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, 0.0 * blurSize)) * 80.0;

  blur += brightPass(uv0 + float2(0.0 * blurSize, 1.0 * blurSize)) * 240.0;
  blur += brightPass(uv0 + float2(0.0 * blurSize, 2.0 * blurSize)) * 192.0;
  blur += brightPass(uv0 + float2(0.0 * blurSize, 3.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(0.0 * blurSize, 4.0 * blurSize)) * 80.0;

  blur += brightPass(uv0 + float2(0.0 * blurSize, -1.0 * blurSize)) * 240.0;
  blur += brightPass(uv0 + float2(0.0 * blurSize, -2.0 * blurSize)) * 192.0;
  blur += brightPass(uv0 + float2(0.0 * blurSize, -3.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(0.0 * blurSize, -4.0 * blurSize)) * 80.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, 1.0 * blurSize)) * 225.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, 1.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, 1.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, 1.0 * blurSize)) * 75.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, 2.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, 2.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, 2.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, 2.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, 3.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, 3.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, 3.0 * blurSize)) * 81.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, 3.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, 4.0 * blurSize)) * 75.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, 4.0 * blurSize)) * 0.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, 4.0 * blurSize)) * 0.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, 4.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, 1.0 * blurSize)) * 225.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, 1.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, 1.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, 1.0 * blurSize)) * 75.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, 2.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, 2.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, 2.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, 2.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, 3.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, 3.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, 3.0 * blurSize)) * 81.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, 3.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, -1.0 * blurSize)) * 225.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, -1.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, -1.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, -1.0 * blurSize)) * 75.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, -2.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, -2.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, -2.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, -2.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, -3.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, -3.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, -3.0 * blurSize)) * 81.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, -3.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(1.0 * blurSize, -4.0 * blurSize)) * 75.0;
  blur += brightPass(uv0 + float2(2.0 * blurSize, -4.0 * blurSize)) * 0.0;
  blur += brightPass(uv0 + float2(3.0 * blurSize, -4.0 * blurSize)) * 0.0;
  blur += brightPass(uv0 + float2(4.0 * blurSize, -4.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, -1.0 * blurSize)) * 225.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, -1.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, -1.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, -1.0 * blurSize)) * 75.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, -2.0 * blurSize)) * 180.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, -2.0 * blurSize)) * 144.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, -2.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, -2.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, -3.0 * blurSize)) * 135.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, -3.0 * blurSize)) * 108.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, -3.0 * blurSize)) * 81.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, -3.0 * blurSize)) * 0.0;

  blur += brightPass(uv0 + float2(-1.0 * blurSize, -4.0 * blurSize)) * 75.0;
  blur += brightPass(uv0 + float2(-2.0 * blurSize, -4.0 * blurSize)) * 0.0;
  blur += brightPass(uv0 + float2(-3.0 * blurSize, -4.0 * blurSize)) * 0.0;
  blur += brightPass(uv0 + float2(-4.0 * blurSize, -4.0 * blurSize)) * 0.0;

  blur = max(blur / 8664.0, float4(0.0, 0.0, 0.0, 0.0));

  // output
  ocol0 = original * 0.6 + blur * 0.2;

}