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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz,ImJezze
//-----------------------------------------------------------------------------
// Effect File Variables
//-----------------------------------------------------------------------------
texture DiffuseA;
texture DiffuseB;
texture DiffuseC;
texture DiffuseD;
texture DiffuseE;
texture DiffuseF;
texture DiffuseG;
texture DiffuseH;
texture DiffuseI;
texture DiffuseJ;
texture DiffuseK;
sampler DiffuseSampler0 = sampler_state
{
Texture = <DiffuseA>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler1 = sampler_state
{
Texture = <DiffuseB>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler2 = sampler_state
{
Texture = <DiffuseC>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler3 = sampler_state
{
Texture = <DiffuseD>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler4 = sampler_state
{
Texture = <DiffuseE>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler5 = sampler_state
{
Texture = <DiffuseF>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler6 = sampler_state
{
Texture = <DiffuseG>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler7 = sampler_state
{
Texture = <DiffuseH>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler8 = sampler_state
{
Texture = <DiffuseI>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSampler9 = sampler_state
{
Texture = <DiffuseJ>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
sampler DiffuseSamplerA = sampler_state
{
Texture = <DiffuseK>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
//-----------------------------------------------------------------------------
// Vertex Definitions
//-----------------------------------------------------------------------------
struct VS_OUTPUT
{
float4 Position : POSITION;
float4 Color : COLOR0;
float4 TexCoord01 : TEXCOORD0;
float4 TexCoord23 : TEXCOORD1;
float4 TexCoord45 : TEXCOORD2;
float4 TexCoord67 : TEXCOORD3;
float4 TexCoord89 : TEXCOORD4;
float2 TexCoordA : TEXCOORD5;
};
struct VS_INPUT
{
float3 Position : POSITION;
float4 Color : COLOR0;
float2 TexCoord : TEXCOORD0;
};
struct PS_INPUT
{
float4 Color : COLOR0;
float4 TexCoord01 : TEXCOORD0;
float4 TexCoord23 : TEXCOORD1;
float4 TexCoord45 : TEXCOORD2;
float4 TexCoord67 : TEXCOORD3;
float4 TexCoord89 : TEXCOORD4;
float2 TexCoordA : TEXCOORD5;
};
//-----------------------------------------------------------------------------
// Constants
//-----------------------------------------------------------------------------
static const float E = 2.7182817f;
static const float Gelfond = 23.140692f; // e^pi (Gelfond constant)
static const float GelfondSchneider = 2.6651442f; // 2^sqrt(2) (Gelfond-Schneider constant)
//-----------------------------------------------------------------------------
// Funcions
//-----------------------------------------------------------------------------
// www.stackoverflow.com/questions/5149544/can-i-generate-a-random-number-inside-a-pixel-shader/
float random(float2 seed)
{
// irrationals for pseudo randomness
float2 i = float2(Gelfond, GelfondSchneider);
return frac(cos(dot(seed, i)) * 123456.0f);
}
//-----------------------------------------------------------------------------
// Bloom Vertex Shader
//-----------------------------------------------------------------------------
uniform float2 ScreenDims;
uniform float2 TargetDims;
uniform float4 Level01Size;
uniform float4 Level23Size;
uniform float4 Level45Size;
uniform float4 Level67Size;
uniform float4 Level89Size;
uniform float2 LevelASize;
VS_OUTPUT vs_main(VS_INPUT Input)
{
VS_OUTPUT Output = (VS_OUTPUT)0;
Output.Position = float4(Input.Position.xyz, 1.0f);
Output.Position.xy /= ScreenDims;
Output.Position.y = 1.0f - Output.Position.y; // flip y
Output.Position.xy -= 0.5f; // center
Output.Position.xy *= 2.0f; // zoom
Output.Color = Input.Color;
float2 TexCoord = Input.Position.xy / ScreenDims;
TexCoord += 0.5f / TargetDims; // half texel offset correction (DX9)
Output.TexCoord01.xy = TexCoord.xy;
Output.TexCoord01.zw = TexCoord.xy + 0.5f / Level01Size.zw;
Output.TexCoord23 = TexCoord.xyxy + 0.5f / Level23Size;
Output.TexCoord45 = TexCoord.xyxy + 0.5f / Level45Size;
Output.TexCoord67 = TexCoord.xyxy + 0.5f / Level67Size;
Output.TexCoord89 = TexCoord.xyxy + 0.5f / Level89Size;
Output.TexCoordA = TexCoord.xy + 0.5f / LevelASize;
return Output;
}
//-----------------------------------------------------------------------------
// Bloom Pixel Shader
//-----------------------------------------------------------------------------
uniform float4 Level0123Weight;
uniform float4 Level4567Weight;
uniform float3 Level89AWeight;
uniform float3 OverdriveWeight;
float3 GetNoiseFactor(float3 n, float random)
{
// smaller n become more noisy
return 1.0f + random * max(0.0f, 0.25f * pow(E, -8 * n));
}
float4 ps_main(PS_INPUT Input) : COLOR
{
float3 texel0 = tex2D(DiffuseSampler0, Input.TexCoord01.xy).rgb;
float3 texel1 = tex2D(DiffuseSampler1, Input.TexCoord01.zw).rgb;
float3 texel2 = tex2D(DiffuseSampler2, Input.TexCoord23.xy).rgb;
float3 texel3 = tex2D(DiffuseSampler3, Input.TexCoord23.zw).rgb;
float3 texel4 = tex2D(DiffuseSampler4, Input.TexCoord45.xy).rgb;
float3 texel5 = tex2D(DiffuseSampler5, Input.TexCoord45.zw).rgb;
float3 texel6 = tex2D(DiffuseSampler6, Input.TexCoord67.xy).rgb;
float3 texel7 = tex2D(DiffuseSampler7, Input.TexCoord67.zw).rgb;
float3 texel8 = tex2D(DiffuseSampler8, Input.TexCoord89.xy).rgb;
float3 texel9 = tex2D(DiffuseSampler9, Input.TexCoord89.zw).rgb;
float3 texelA = tex2D(DiffuseSamplerA, Input.TexCoordA).rgb;
texel0 = texel0 * Level0123Weight.x;
texel1 = texel1 * Level0123Weight.y;
texel2 = texel2 * Level0123Weight.z;
texel3 = texel3 * Level0123Weight.w;
texel4 = texel4 * Level4567Weight.x;
texel5 = texel5 * Level4567Weight.y;
texel6 = texel6 * Level4567Weight.z;
texel7 = texel7 * Level4567Weight.w;
texel8 = texel8 * Level89AWeight.x;
texel9 = texel9 * Level89AWeight.y;
texelA = texelA * Level89AWeight.z;
float3 bloom = float3(
texel1 +
texel2 +
texel3 +
texel4 +
texel5 +
texel6 +
texel7 +
texel8 +
texel9 +
texelA);
float3 bloomOverdrive = max(0.0f, texel0 + bloom - 1.0f) * OverdriveWeight;
bloom.r += bloomOverdrive.g * 0.5f;
bloom.r += bloomOverdrive.b * 0.5f;
bloom.g += bloomOverdrive.r * 0.5f;
bloom.g += bloomOverdrive.b * 0.5f;
bloom.b += bloomOverdrive.r * 0.5f;
bloom.b += bloomOverdrive.g * 0.5f;
float2 NoiseCoord = Input.TexCoord01.xy;
float3 NoiseFactor = GetNoiseFactor(bloom, random(NoiseCoord));
return float4(texel0 + bloom * NoiseFactor, 1.0f);
}
//-----------------------------------------------------------------------------
// Bloom Effect
//-----------------------------------------------------------------------------
technique TestTechnique
{
pass Pass0
{
Lighting = FALSE;
Sampler[0] = <DiffuseSampler0>; // 2048x2048
Sampler[1] = <DiffuseSampler1>; // 1024x1024
Sampler[2] = <DiffuseSampler2>; // 512x512
Sampler[3] = <DiffuseSampler3>; // 256x256
Sampler[4] = <DiffuseSampler4>; // 128x128
Sampler[5] = <DiffuseSampler5>; // 64x64
Sampler[6] = <DiffuseSampler6>; // 32x32
Sampler[7] = <DiffuseSampler7>; // 16x16
Sampler[8] = <DiffuseSampler8>; // 8x8
Sampler[9] = <DiffuseSampler9>; // 4x4
Sampler[10] = <DiffuseSamplerA>; // 2x2
VertexShader = compile vs_3_0 vs_main();
PixelShader = compile ps_3_0 ps_main();
}
}
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