1al_get_parent_bitmap(3)                                al_get_parent_bitmap(3)
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NAME

6       al_get_parent_bitmap - Allegro 5 API
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SYNOPSIS

9              #include <allegro5/allegro.h>
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11              ALLEGRO_BITMAP *al_get_parent_bitmap(ALLEGRO_BITMAP *bitmap)
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DESCRIPTION

14       Returns  the  bitmap  this  bitmap is a sub-bitmap of.  Returns NULL if
15       this bitmap is not a sub-bitmap.  This function always returns the real
16       bitmap,  and  never a sub-bitmap.  This might NOT match what was passed
17       to al_create_sub_bitmap(3).  Consider this code, for instance:
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19              ALLEGRO_BITMAP* a = al_create_bitmap(512, 512);
20              ALLEGRO_BITMAP* b = al_create_sub_bitmap(a, 128, 128, 256, 256);
21              ALLEGRO_BITMAP* c = al_create_sub_bitmap(b, 64, 64, 128, 128);
22              ASSERT(al_get_parent_bitmap(b) == a && al_get_parent_bitmap(c) == a);
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24       The assertion will pass because only a is a real bitmap, and both b and
25       c are its sub-bitmaps.
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SINCE

28       5.0.6, 5.1.2
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SEE ALSO

31       al_create_sub_bitmap(3), al_is_sub_bitmap(3)
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35Allegro reference manual                               al_get_parent_bitmap(3)
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