Martins improved Film Grain shader

21/07/2015 12:28:15:013 [12348] | INFO  | Loading effect from "H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\d3d9.fx" ...
21/07/2015 12:28:16:606 [12348] | ERROR | Failed to compile effect on context 0A3FC5E8:

H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(9, 7): warning X5000: global variables are considered 'uniform' by default
H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(10, 7): warning X5000: global variables are considered 'uniform' by default
H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(13, 7): warning X5000: global variables are considered 'uniform' by default
H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(14, 7): warning X5000: global variables are considered 'uniform' by default
H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(15, 7): warning X5000: global variables are considered 'uniform' by default
H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(16, 7): warning X5000: global variables are considered 'uniform' by default
H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(104, 8): error: internal shader creation failed with '2289436780'!

21/07/2015 12:28:16:606 [12348] | ERROR | Failed to compile effect on context 0A3FC5E8:
...
H:\Steam\steamapps\common\Tony Hawk's Pro Skater HD\Binaries\Win32\/ReShade/CustomFX/Grain.h(104, 8): error: internal shader creation failed with '2289436780'!

float4 GrainPass(float4 position : SV_Position, float2 texcoord : TEXCOORD0) : SV_Target
{
    float3 rotOffset = float3(1.425,3.892,5.835); //rotation offset values  
    float2 rotCoordsR = coordRot(texcoord, timer + rotOffset.x);
    float2 rot = rotCoordsR*float2(width/grainsize,height/grainsize);
    float pNoise = pnoise3D(float3(rot.x,rot.y,0.0));
    float3 noise = float3(pNoise, pNoise, pNoise);
  
    if (colored == 1)
    {
        float2 rotCoordsG = coordRot(texcoord, timer + rotOffset.y);
        float2 rotCoordsB = coordRot(texcoord, timer + rotOffset.z);
        noise.g = lerp(noise.r,pnoise3D(float3(rotCoordsG*float2(width/grainsize,height/grainsize),1.0)),coloramount);
        noise.b = lerp(noise.r,pnoise3D(float3(rotCoordsB*float2(width/grainsize,height/grainsize),2.0)),coloramount);
    }
    
    float3 col = position.rgb;

    //noisiness response curve based on scene luminance
    float3 lumcoeff = float3(0.299,0.587,0.114);
    float luminance = lerp(0.0,dot(col, lumcoeff),lumamount);
    float lum = smoothstep(0.2,0.0,luminance);
    lum += luminance;
    
    float2 thepow = pow(lum, 4.0);
    
    noise = lerp(noise,float3(0.0, 0.0, 0.0),pow(lum,4.0));
    col += noise*grainamount;
   
    return float4(col,1.0);
}

technique Grain_Tech <bool enabled = RFX_Start_Enabled; int toggle = Cel_ToggleKey; >
{
	pass Grain_Pass
	{
		VertexShader = RFX_VS_PostProcess;
		PixelShader = GrainPass;
	}
}