static const bool description < string help = "Makes bright lights bleed their light into their surroundings."; > = true;

iface float BloomIntensity
< string help = "Controls the intensity of the bloom texture."; >
   = 1.30;

iface float OriginalIntensity
< string help = "Controls the intensity of the original scene texture."; >
   = 1.00;
   
iface float BloomSaturation
< string help = "Saturation amount on bloom."; >
   = 1.00;
   
iface float OriginalSaturation
< string help = "Saturation amount on original scene."; >
   = 1.00;
   

sampler BloomSampler : register(s0);

texture2D obge_LastRendertarget0_EFFECTPASS;

sampler2D ColorMapSampler = sampler_state {
   texture = <obge_LastRendertarget0_EFFECTPASS>;
   AddressU  = CLAMP;
   AddressV  = CLAMP;
   MINFILTER = LINEAR;
   MAGFILTER = LINEAR;
   MIPFILTER = LINEAR;
};

struct VSOUT {
   float4 vertPos : POSITION;
   float2 UVCoord : TEXCOORD0;
};

struct VSIN {
   float4 vertPos : POSITION0;
   float2 UVCoord : TEXCOORD0;
};

VSOUT DummyVS(VSIN IN) {
   VSOUT OUT = (VSOUT)0.0f;   // initialize to zero, avoid complaints.
   OUT.vertPos = IN.vertPos;
   OUT.UVCoord = IN.UVCoord;
   return (OUT);
}

float4 AdjustSaturation(float4 Color, float Saturation) {
   float Grey = dot(Color.rgb, float3(0.3, 0.59, 0.11));
   return lerp(Grey, Color, Saturation);
}

float4 BloomShader(float2 Tex : TEXCOORD0) : COLOR0 {
   float4 bloomColor = tex2D(BloomSampler, Tex);
   float4 originalColor = tex2D(ColorMapSampler, Tex);
   bloomColor = AdjustSaturation(bloomColor, BloomSaturation) * BloomIntensity;
    originalColor = AdjustSaturation(originalColor, OriginalSaturation) * OriginalIntensity;
   originalColor *= (1 - saturate(bloomColor));
   return originalColor + bloomColor;
}

technique main <
   int group = EFFECTGROUP_POST;
   int fxclass = EFFECTCLASS_COLOR;
>

{
   pass p0 {
      VertexShader = compile vs_1_1 DummyVS();
      PixelShader  = compile ps_2_0 BloomShader();
   }
}

static const bool description < string help = "Makes bright lights bleed their light into their surroundings."; > = true;

iface float BloomIntensity
< string help = "Controls the intensity of the bloom texture."; >
   = 1.30;

iface float OriginalIntensity
< string help = "Controls the intensity of the original scene texture."; >
   = 1.00;
   
iface float BloomSaturation
< string help = "Saturation amount on bloom."; >
   = 1.00;
   
iface float OriginalSaturation
< string help = "Saturation amount on original scene."; >
   = 1.00;
   
texture2D ColorMap;
   
sampler2D BloomSampler : register(s1);

sampler2D ColorMapSampler = sampler_state {
   texture = <ColorMap>;
   AddressU  = CLAMP;
   AddressV  = CLAMP;
   MINFILTER = LINEAR;
   MAGFILTER = LINEAR;
   MIPFILTER = LINEAR;
};

struct VSOUT {
   float4 vertPos : POSITION;
   float2 UVCoord : TEXCOORD0;
};

struct VSIN {
   float4 vertPos : POSITION0;
   float2 UVCoord : TEXCOORD0;
};

VSOUT DummyVS(VSIN IN) {
   VSOUT OUT = (VSOUT)0.0f;   // initialize to zero, avoid complaints.
   OUT.vertPos = IN.vertPos;
   OUT.UVCoord = IN.UVCoord;
   return (OUT);
}

float4 AdjustSaturation(float4 Color, float Saturation) {
   float Grey = dot(Color, float4(0.3, 0.59, 0.11, 0.0));
   return lerp(Grey, Color, Saturation);
}

float4 BloomShader(float2 Tex : TEXCOORD0) : COLOR0 {
   float4 bloomColor = tex2D(BloomSampler, Tex);
   float4 originalColor = tex2D(ColorMapSampler, Tex);
   bloomColor = AdjustSaturation(bloomColor, BloomSaturation) * BloomIntensity;
    originalColor = AdjustSaturation(originalColor, OriginalSaturation) * OriginalIntensity;
   originalColor *= (1 - saturate(bloomColor));
   return originalColor + bloomColor;
}

technique main <
   int group = EFFECTGROUP_POST;
   int fxclass = EFFECTCLASS_COLOR;
>

{
   pass p0 {
      VertexShader = compile vs_1_1 DummyVS();
      PixelShader  = compile ps_2_0 BloomShader();
   }
}