al_convert_bitmap - Allegro 5 API

       Converts the bitmap to the current bitmap flags and format.  The bitmap will be as if it was created anew
       with  al_create_bitmap(3alleg5)  but  retain  its  contents.   All  of this bitmap’s sub-bitmaps are also
       converted.  If the new bitmap type is memory,  then  the  bitmap’s  projection  bitmap  is  reset  to  be
       orthographic.

       If this bitmap is a sub-bitmap, then it, its parent and all the sibling sub-bitmaps are also converted.

       al_convert_bitmap - Allegro 5 API

al_create_bitmap(3alleg5),      al_set_new_bitmap_format(3alleg5),      al_set_new_bitmap_flags(3alleg5),
       al_clone_bitmap(3alleg5)

Allegro reference manual                                                              al_convert_bitmap(3alleg5)

       5.1.0

              #include <allegro5/allegro.h>

              void al_convert_bitmap(ALLEGRO_BITMAP *bitmap)