luboslenco
33 lines
1.0 KiB
GLSL
33 lines
1.0 KiB
GLSL
#version 450
|
|
|
|
uniform sampler2D tex;
|
|
// uniform sampler2D histogram;
|
|
uniform float vignetteStrength;
|
|
uniform float grainStrength;
|
|
|
|
in vec2 texCoord;
|
|
out vec4 fragColor;
|
|
|
|
// Based on Filmic Tonemapping Operators http://filmicgames.com/archives/75
|
|
vec3 tonemapFilmic(const vec3 color) {
|
|
vec3 x = max(vec3(0.0), color - 0.004);
|
|
return (x * (6.2 * x + 0.5)) / (x * (6.2 * x + 1.7) + 0.06);
|
|
}
|
|
|
|
void main() {
|
|
fragColor = textureLod(tex, texCoord, 0.0);
|
|
|
|
// Static grain
|
|
float x = (texCoord.x + 4.0) * (texCoord.y + 4.0) * 10.0;
|
|
fragColor.rgb += vec3(mod((mod(x, 13.0) + 1.0) * (mod(x, 123.0) + 1.0), 0.01) - 0.005) * grainStrength;
|
|
|
|
fragColor.rgb *= (1.0 - vignetteStrength) + vignetteStrength * pow(16.0 * texCoord.x * texCoord.y * (1.0 - texCoord.x) * (1.0 - texCoord.y), 0.2);
|
|
|
|
// Auto exposure
|
|
// const float autoExposureStrength = 1.0;
|
|
// float expo = 2.0 - clamp(length(textureLod(histogram, vec2(0.5, 0.5), 0).rgb), 0.0, 1.0);
|
|
// fragColor.rgb *= pow(expo, autoExposureStrength * 2.0);
|
|
|
|
fragColor.rgb = tonemapFilmic(fragColor.rgb); // With gamma
|
|
}
|