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.TH "al_get_parent_bitmap" "3" "" "Allegro reference manual" ""
.SH NAME
al_get_parent_bitmap \- Allegro 5 API
.SH SYNOPSIS
.IP
.EX
#include <allegro5/allegro.h>

ALLEGRO_BITMAP *al_get_parent_bitmap(ALLEGRO_BITMAP *bitmap)
.EE
.SH 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:
.IP
.EX
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);
.EE
.PP
The assertion will pass because only \f[CR]a\f[R] is a real bitmap, and
both \f[CR]b\f[R] and \f[CR]c\f[R] are its sub\-bitmaps.
.SH SINCE
5.0.6, 5.1.2
.SH SEE ALSO
al_create_sub_bitmap(3), al_is_sub_bitmap(3)