mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-12-05 03:55:39 +00:00
76 lines
2.2 KiB
HLSL
76 lines
2.2 KiB
HLSL
|
#include "ReShade.fxh"
|
||
|
|
||
|
|
||
|
// Multi-LUT Shader
|
||
|
|
||
|
// A simple shader that can load 2 LUTs.
|
||
|
// Can turn LUT off too.
|
||
|
|
||
|
|
||
|
|
||
|
uniform int LUT_selector <
|
||
|
ui_type = "combo";
|
||
|
ui_items = "Off\0Grade-RGB\0Grade-Composite\0";
|
||
|
ui_label = "LUT selector";
|
||
|
ui_tooltip = "Off: nothing. Grade-RGB: rgb trinitron colors. Grade-Composite: composite trinitron colors.";
|
||
|
> = 1;
|
||
|
|
||
|
|
||
|
texture tLUT1<source="../Textures/multi-LUT/grade-rgb.png";>{Width=1024;Height=32;};
|
||
|
sampler SamplerLUT1{Texture=tLUT1;};
|
||
|
|
||
|
texture tLUT2<source="../Textures/multi-LUT/grade-composite.png";>{Width=1024;Height=32;};
|
||
|
sampler SamplerLUT2{Texture=tLUT2;};
|
||
|
|
||
|
// This shouldn't be necessary but it seems some undefined values can
|
||
|
// creep in and each GPU vendor handles that differently. This keeps
|
||
|
// all values within a safe range
|
||
|
float4 mixfix(float4 a, float4 b, float c)
|
||
|
{
|
||
|
return (a.z < 1.0) ? lerp(a, b, c) : a;
|
||
|
}
|
||
|
|
||
|
float4 multiLUT(float4 vpos: SV_Position, float2 vTexCoord : TEXCOORD0) : SV_Target
|
||
|
{
|
||
|
float4 imgColor = tex2D(ReShade::BackBuffer, vTexCoord.xy);
|
||
|
|
||
|
if (LUT_selector > 0)
|
||
|
{
|
||
|
//float LUT_Size = lerp(textureSize(SamplerLUT1, 0).y, textureSize(SamplerLUT2, 0).y, LUT_selector_param - 1.0);
|
||
|
float LUT_Size = 32.0;
|
||
|
float4 color1, color2 = float4(0.,0.,0.,0.);
|
||
|
float red, green, blue1, blue2, mixer = 0.0;
|
||
|
|
||
|
red = ( imgColor.r * (LUT_Size - 1.0) + 0.4999 ) / (LUT_Size * LUT_Size);
|
||
|
green = ( imgColor.g * (LUT_Size - 1.0) + 0.4999 ) / LUT_Size;
|
||
|
blue1 = (floor( imgColor.b * (LUT_Size - 1.0) ) / LUT_Size) + red;
|
||
|
blue2 = (ceil( imgColor.b * (LUT_Size - 1.0) ) / LUT_Size) + red;
|
||
|
mixer = clamp(max((imgColor.b - blue1) / (blue2 - blue1), 0.0), 0.0, 32.0);
|
||
|
|
||
|
if(LUT_selector == 1)
|
||
|
{
|
||
|
color1 = tex2D(SamplerLUT1, float2( blue1, green ));
|
||
|
color2 = tex2D(SamplerLUT1, float2( blue2, green ));
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
color1 = tex2D(SamplerLUT2, float2( blue1, green ));
|
||
|
color2 = tex2D(SamplerLUT2, float2( blue2, green ));
|
||
|
}
|
||
|
imgColor = mixfix(color1, color2, mixer);
|
||
|
}
|
||
|
|
||
|
return imgColor;
|
||
|
}
|
||
|
|
||
|
|
||
|
|
||
|
technique multiLUT
|
||
|
{
|
||
|
pass PS_multiLUT
|
||
|
{
|
||
|
VertexShader = PostProcessVS;
|
||
|
PixelShader = multiLUT;
|
||
|
}
|
||
|
}
|