al_color_rgb_to_xyz - Allegro 5 API

       Convert RGB values to XYZ color space.

       al_color_rgb_to_xyz - Allegro 5 API

al_color_xyz(3alleg5), al_color_xyz_to_rgb(3alleg5)

Allegro reference manual                                                            al_color_rgb_to_xyz(3alleg5)

       5.2.3

              #include <allegro5/allegro_color.h>

              void al_color_rgb_to_xyz(float red, float green, float blue,
                 float *x, float *y, float *z)