func (m *Map) Tiles(x, y int) []*MapTile {
var length C.int
c_tiles := C.al_get_tiles((*C.ALLEGRO_MAP)(m), C.int(x), C.int(y), &length)
ptr := uintptr(unsafe.Pointer(c_tiles))
tiles := make([]*MapTile, int(length))
for i := range tiles {
tiles[i] = (*MapTile)(unsafe.Pointer(ptr + uintptr(i)))
}
// When the list of tiles is garbage-collected, make sure the C list
// backing it is freed.
runtime.SetFinalizer(tiles, func(x []*MapTile) {
C._al_free(unsafe.Pointer(c_tiles))
})
return tiles
}
func (l MapLayer) Objects() []*MapObject {
var length C.int
c_objects := C.al_get_objects((*C.ALLEGRO_MAP_LAYER)(l.raw), &length)
ptr := uintptr(unsafe.Pointer(c_objects))
objects := make([]*MapObject, int(length))
for i := range objects {
objects[i] = (*MapObject)(unsafe.Pointer(ptr + uintptr(i)))
}
// When the list of objects is garbage-collected, make sure the C list
// backing it is freed.
runtime.SetFinalizer(objects, func(x []*MapObject) {
C._al_free(unsafe.Pointer(c_objects))
})
return objects
}