al_get_parent_bitmap(3)                                al_get_parent_bitmap(3)

NAME
       al_get_parent_bitmap - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro.h>

              ALLEGRO_BITMAP *al_get_parent_bitmap(ALLEGRO_BITMAP *bitmap)


DESCRIPTION
       Returns the bitmap this bitmap is a sub-bitmap of.  Returns NULL if
       this bitmap is not a sub-bitmap.  This function always returns the real
       bitmap, and never a sub-bitmap.  This might NOT match what was passed
       to al_create_sub_bitmap(3).  Consider this code, for instance:


              ALLEGRO_BITMAP* a = al_create_bitmap(512, 512);
              ALLEGRO_BITMAP* b = al_create_sub_bitmap(a, 128, 128, 256, 256);
              ALLEGRO_BITMAP* c = al_create_sub_bitmap(b, 64, 64, 128, 128);
              ASSERT(al_get_parent_bitmap(b) == a && al_get_parent_bitmap(c) == a);


       The assertion will pass because only a is a real bitmap, and both b and
       c are its sub-bitmaps.

SINCE
       5.0.6, 5.1.2

SEE ALSO
       al_create_sub_bitmap(3), al_is_sub_bitmap(3)

Allegro reference manual                               al_get_parent_bitmap(3)