al_destroy_bitmap - Allegro 5 API

       Destroys  the  given  bitmap, freeing all resources used by it.  This function does nothing if the bitmap
       argument is NULL.

       As a convenience, if the calling thread is currently  targeting  the  bitmap  then  the  bitmap  will  be
       untargeted first.  The new target bitmap is unspecified.  (since: 5.0.10, 5.1.6)

       Otherwise,  it  is  an  error  to destroy a bitmap while it (or a sub-bitmap) is the target bitmap of any
       thread.

       al_destroy_bitmap - Allegro 5 API

al_create_bitmap(3alleg5)

Allegro reference manual                                                              al_destroy_bitmap(3alleg5)

              #include <allegro5/allegro.h>

              void al_destroy_bitmap(ALLEGRO_BITMAP *bitmap)