al_reparent_bitmap - Allegro 5 API

       For  a  sub-bitmap, changes the parent, position and size.  This is the same as destroying the bitmap and
       re-creating it with al_create_sub_bitmap(3alleg5) - except the bitmap pointer stays the same.   This  has
       many  uses, for example an animation player could return a single bitmap which can just be re-parented to
       different animation frames without having to re-draw the contents.  Or a sprite  atlas  could  re-arrange
       its sprites without having to invalidate all existing bitmaps.

       al_reparent_bitmap - Allegro 5 API

al_create_sub_bitmap(3alleg5), al_get_parent_bitmap(3alleg5)

       5.1.12

Allegro reference manual                                                             al_reparent_bitmap(3alleg5)

              #include <allegro5/allegro.h>

              void al_reparent_bitmap(ALLEGRO_BITMAP *bitmap, ALLEGRO_BITMAP *parent,
                 int x, int y, int w, int h)