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.TH "al_get_parent_bitmap" "3alleg5" "" "Allegro reference manual" ""
.hy
.SH NAME
.PP
al_get_parent_bitmap - Allegro 5 API
.SH SYNOPSIS
.IP
.nf
\f[C]
#include <allegro5/allegro.h>

ALLEGRO_BITMAP *al_get_parent_bitmap(ALLEGRO_BITMAP *bitmap)
\f[R]
.fi
.SH DESCRIPTION
.PP
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(3alleg5).
Consider this code, for instance:
.IP
.nf
\f[C]
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);
\f[R]
.fi
.PP
The assertion will pass because only \f[C]a\f[R] is a real bitmap, and
both \f[C]b\f[R] and \f[C]c\f[R] are its sub-bitmaps.
.SH SINCE
.PP
5.0.6, 5.1.2
.SH SEE ALSO
.PP
al_create_sub_bitmap(3alleg5), al_is_sub_bitmap(3alleg5)