al_destroy_bitmap - Allegro 5 API
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#include <allegro5/allegro.h>
void al_destroy_bitmap(ALLEGRO_BITMAP *bitmap)
Destroys the given bitmap, freeing all resources used by it. This function does
nothing if the bitmap argument is NULL.
As a convenience, if the calling thread is currently targeting the
bitmap then the bitmap will be untargeted first. The new target bitmap is
unspecified. (since: 5.0.10, 5.1.6)
Otherwise, it is an error to destroy a bitmap while it (or a
sub-bitmap) is the target bitmap of any thread.