LYGIA Shader Library

Use:

exposure(<float|vec3|vec4> color, float amount)

Check it on Github

#ifndef FNC_EXPOSURE
#define FNC_EXPOSURE
float exposure(float v, float a) { return v * pow(2., a); }
vec3 exposure(vec3 v, float a) { return v * pow(2., a); }
vec4 exposure(vec4 v, float a) { return vec4(v.rgb * pow(2., a), v.a); }
#endif

Use:

exposure(<float|float3|float4> color, float amount)

Check it on Github

#ifndef FNC_EXPOSURE
#define FNC_EXPOSURE
float exposure(float value, float amount) {
    return value * pow(2., amount);
}

float3 exposure(float3 color, float amount) {
    return color * pow(2., amount);
}

float4 exposure(float4 color, float amount) {
    return float4(exposure( color.rgb, amount ), color.a);
}
#endif

Check it on Github

fn exposure(color : vec3<f32>, amount : f32) -> vec3<f32> {
    return color * pow(2., amount);
}