LYGIA Shader Library

Use:

<vec3|vec4> tonemapUncharted2(<vec3|vec4> x)

Check it on Github

#ifndef FNC_TONEMAPUNCHARTED2
#define FNC_TONEMAPUNCHARTED2
vec3 tonemapUncharted2(vec3 v) {
    float A = 0.15; // 0.22
    float B = 0.50; // 0.30
    float C = 0.10;
    float D = 0.20;
    float E = 0.02; // 0.01
    float F = 0.30;
    float W = 11.2;

    vec4 x = vec4(v, W);
    x = ((x*(A*x+C*B)+D*E)/(x*(A*x+B)+D*F))-E/F;
    return x.xyz / x.w;
}

vec4 tonemapUncharted2(const vec4 x) { return vec4( tonemapUncharted2(x.rgb), x.a); }
#endif

Use:

<float3|float4> tonemapUncharted2(<float3|float4> x)

Check it on Github

#ifndef FNC_TONEMAPUNCHARTED2
#define FNC_TONEMAPUNCHARTED2
float3 tonemapUncharted2(float3 color) {
    float A = 0.15; // 0.22
    float B = 0.50; // 0.30
    float C = 0.10;
    float D = 0.20;
    float E = 0.02; // 0.01
    float F = 0.30;
    float W = 11.2;

    float4 x = float4(color, W);
    x = ((x*(A*x+C*B)+D*E)/(x*(A*x+B)+D*F))-E/F;
    return x.xyz / x.w;
}

float4 tonemapUncharted2(const float4 x) { return float4( tonemapUncharted2(x.rgb), x.a); }
#endif