void spu_Attach( spu_t *, vlc_object_t *, bool );
VLC_EXPORT( subpicture_t *, spu_CreateSubpicture, ( spu_t * ) );
+/* XXX you cannot call spu_DestroySubpicture on a displayed picture */
VLC_EXPORT( void, spu_DestroySubpicture, ( spu_t *, subpicture_t * ) );
VLC_EXPORT( void, spu_DisplaySubpicture, ( spu_t *, subpicture_t * ) );