slang-shaders/crt/shaders/guest/linearize_scanlines.slang

#version 450

layout(push_constant) uniform Push
{
	vec4 SourceSize;
	vec4 OriginalSize;
	vec4 OutputSize;
	uint FrameCount;
   float SCANLINE_GAMMA;
} params;

#pragma parameter SCANLINE_GAMMA "Scanline Spike Removal" 12.0 1.0 15.0 0.5
#define SCANLINE_GAMMA params.SCANLINE_GAMMA

layout(std140, set = 0, binding = 0) uniform UBO
{
	mat4 MVP;
} global;

#pragma stage vertex
layout(location = 0) in vec4 Position;
layout(location = 1) in vec2 TexCoord;
layout(location = 0) out vec2 vTexCoord;

void main()
{
   gl_Position = global.MVP * Position;
   vTexCoord = TexCoord;
}

#pragma stage fragment
layout(location = 0) in vec2 vTexCoord;
layout(location = 0) out vec4 FragColor;
layout(set = 0, binding = 2) uniform sampler2D AfterglowPass;

void main()
{
   FragColor = vec4(pow(vec3(texture(AfterglowPass, vTexCoord).rgb), vec3(SCANLINE_GAMMA)),1.0/SCANLINE_GAMMA);
}