80 lines
1.7 KiB
GLSL
80 lines
1.7 KiB
GLSL
// Input, output blocks
|
|
VERTEX_EXPORT VertexData {
|
|
vec2 uv;
|
|
} VertexOut;
|
|
|
|
#if VERTEX_SHADER
|
|
|
|
layout(location = 0) in vec3 aPos;
|
|
|
|
void main() {
|
|
gl_Position = vec4(aPos, 1);
|
|
VertexOut.uv = aPos.xy * 0.5 + 0.5;
|
|
}
|
|
#endif // VERTEX_SHADER
|
|
|
|
#if FRAGMENT_SHADER
|
|
|
|
// Translated from https://github.com/TheRealMJP/BakingLab/blob/master/BakingLab/ACES.hlsl
|
|
// sRGB => XYZ => D65_2_D60 => AP1 => RRT_SAT
|
|
const mat3 ACESInputMat = mat3(
|
|
vec3(0.59719, 0.07600, 0.02840),
|
|
vec3(0.35458, 0.90834, 0.01566),
|
|
vec3(0.04823, 0.13383, 0.83777)
|
|
);
|
|
|
|
// ODT_SAT => XYZ => D60_2_D65 => sRGB
|
|
const mat3 ACESOutputMat = mat3(
|
|
vec3( 1.60475, -0.10208, -0.00327),
|
|
vec3(-0.53108, 1.10813, -0.00605),
|
|
vec3(-0.07367, -0.07276, 1.07602)
|
|
);
|
|
|
|
vec3 RRTAndODTFit(vec3 v) {
|
|
vec3 a = v * (v + 0.0245786f) - 0.000090537f;
|
|
vec3 b = v * (0.983729f * v + 0.4329510f) + 0.238081f;
|
|
return a / b;
|
|
}
|
|
|
|
vec3 ACESFitted(vec3 color)
|
|
{
|
|
color = ACESInputMat * color;
|
|
|
|
// Apply RRT and ODT
|
|
color = RRTAndODTFit(color);
|
|
|
|
color = ACESOutputMat * color;
|
|
|
|
// Clamp to [0, 1]
|
|
color = clamp(color, 0, 1);
|
|
|
|
return color;
|
|
}
|
|
|
|
layout(binding = 0) uniform sampler2D screen_sampler;
|
|
|
|
out vec4 FragColor;
|
|
|
|
vec3 linearToSRGB(vec3 color) {
|
|
vec3 x = color * 12.92f;
|
|
vec3 y = 1.055f * pow(clamp(color, 0, 1), vec3(1.0f / 2.4f)) - 0.055f;
|
|
|
|
vec3 clr = color;
|
|
clr.r = color.r < 0.0031308f ? x.r : y.r;
|
|
clr.g = color.g < 0.0031308f ? x.g : y.g;
|
|
clr.b = color.b < 0.0031308f ? x.b : y.b;
|
|
|
|
return clr;
|
|
}
|
|
|
|
void main() {
|
|
vec3 hdr_color = texture(screen_sampler, VertexOut.uv).rgb;
|
|
hdr_color = ACESFitted(hdr_color);
|
|
|
|
FragColor.rgb = linearToSRGB(hdr_color);
|
|
FragColor.a = 1;
|
|
}
|
|
|
|
|
|
#endif // FRAGMNET_SHADER
|