al_add_new_bitmap_flag - Man Page

#include <allegro5/allegro.h>

void al_add_new_bitmap_flag(int flag)

A convenience function which does the same as

al_set_new_bitmap_flags(al_get_new_bitmap_flags() | flag);

al_set_new_bitmap_flags(3), al_get_new_bitmap_flags(3), al_get_bitmap_flags(3)