mapRect method
Sets dst to bounds of src corners mapped by Matrix. Returns true if mapped corners are dst corners.
Returned value is the same as calling rectStaysRect().
@param dst storage for bounds of mapped Point @param src Rect to map @return true if dst is equivalent to mapped src
Implementation
(bool, Rect) mapRect(Rect src) {
final p = calloc<c.mnn_cv_rect_t>();
final success = c.mnn_cv_matrix_map_rect(ptr, p, src.ptr.cast());
return (success, Rect.fromPointer(p.cast()));
}