al_color_rgb_to_cmyk(3alleg5) Allegro reference manual

NAME

al_color_rgb_to_cmyk − Allegro 5 API

SYNOPSIS

#include <allegro5/allegro_color.h>


void al_color_rgb_to_cmyk(float red, float green, float blue,   
   float *cyan, float *magenta, float *yellow, float *key)

DESCRIPTION

Each RGB color can be represented in CMYK with a K component of 0 with the following formula:

C = 1 − R
M = 1 − G
Y = 1 − B
K = 0

This function will instead find the representation with the maximal value for K and minimal color components.

SEE ALSO

al_color_cmyk(3alleg5), al_color_cmyk_to_rgb(3alleg5)