slang-shaders/dithering/shaders/checkerboard-dedither/linearize.slang

#version 450

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

#pragma parameter CD_BLEND_OPTION    "CHECKERBOARD-DEDITHER: [ OFF | ON ]" 1.0  0.0 1.0  1.0
#pragma parameter UseGamma           "    Gamma Slider"                    1.0  0.0 1.0  0.1

#define UseGamma     params.UseGamma
#define InputGamma   (UseGamma+1.0)

#define GAMMA_IN(color)     pow(color, vec3(InputGamma, InputGamma, InputGamma))

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 Source;

void main()
{
   FragColor = vec4(GAMMA_IN(texture(Source, vTexCoord).rgb), 1.0);
}