al_create_sub_bitmap - Online Linux Manual PageSection : 3
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Source : Allegro reference manual
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NAMEal_create_sub_bitmap − Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
ALLEGRO_BITMAP *al_create_sub_bitmap(ALLEGRO_BITMAP *parent,
int x, int y, int w, int h)
DESCRIPTIONCreates a sub−bitmap of the parent, at the specified coordinates and of the specified size. A sub−bitmap is a bitmap that shares drawing memory with a pre−existing (parent) bitmap, but possibly with a different size and clipping settings. The sub−bitmap may originate off or extend past the parent bitmap. See the discussion in al_get_backbuffer(3) about using sub−bitmaps of the backbuffer. The parent bitmap's clipping rectangles are ignored. If a sub−bitmap was not or cannot be created then NULL is returned. When you are done with using the sub−bitmap you must call al_destroy_bitmap(3) on it to free any resources allocated for it. Note that destroying parents of sub−bitmaps will not destroy the sub−bitmaps; instead the sub−bitmaps become invalid and should no longer be used for drawing − they still must be destroyed with al_destroy_bitmap(3) however. It does not matter whether you destroy a sub−bitmap before or after its parent otherwise.
SEE ALSOal_create_bitmap(3) 0
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