Allegro 5 api
#include <allegro5/allegro.h> ALLEGRO_COLOR al_map_rgba( unsigned char r, unsigned char g, unsigned char b, unsigned char a)
Convert r, g, b, a (ranging from 0-255) into an ALLEGRO_COLOR(3alleg5).
al_map_rgb(3alleg5), al_map_rgba_f(3alleg5), al_map_rgb_f(3alleg5)