colorcorrection.h File Reference

Go to the source code of this file.

Data Structures
struct	ChannelCorrection

Functions
float	brightness (float v, float brightness_value)
float	contrast (float v, float contrast_value)
	Calculate contrast corrected value. More...
float	gamma (float v, float gamma_value)
	Calculate gamma corrected value. More...
float	corrected (in ChannelCorrection c, in float v)
vec3	color_correction (vec3 color)

Variables
ChannelCorrection	cc_red
ChannelCorrection	cc_green
ChannelCorrection	cc_blue
ChannelCorrection	cc_all

Function Documentation

float brightness	(	float	v,
		float	brightness_value
	)

                                                  {
    return max(v + brightness_value,0.0);
}

vec3 color_correction

(

vec3

color

)

                                  {
    if (cc_all.multiplier == 0.0) {
        return color;
    }
    return clamp(vec3(
        corrected(cc_all,corrected(cc_red,color.r)),
        corrected(cc_all,corrected(cc_green,color.g)),
        corrected(cc_all,corrected(cc_blue,color.b))
    ),vec3(0.0,0.0,0.0),vec3(1.0,1.0,1.0));
}

float contrast	(	float	v,
		float	contrast_value
	)

Calculate contrast corrected value.

                                              {
    float _c = (contrast_value <= 0.0) ?
        contrast_value + 1.0 :
        (1.0 / (1.0 - contrast_value));
    return (v - 0.5) * max(_c, 0.0f) + 0.5;
}

float corrected	(	in ChannelCorrection	c,
		in float	v
	)

                                                    {
    return brightness(contrast(gamma(v,
        c.gamma * c.multiplier),
        c.contrast * c.multiplier),
        c.brightness * c.multiplier);
}

float gamma	(	float	v,
		float	gamma_value
	)

Calculate gamma corrected value.

                                        {
    float g = 0.0;
    if (gamma_value >= 0.0) {
        g = 1.0 / (1.0 + gamma_value);
    } else {
        g = (1.0 - gamma_value);
    }
    return pow(v,g*g*g*g);
}

Variable Documentation

ChannelCorrection cc_all

ChannelCorrection cc_blue

ChannelCorrection cc_green

ChannelCorrection cc_red