int32_t width = _view_rectangle_x.second - _view_rectangle_x.first;
int32_t height = _view_rectangle_y.second - _view_rectangle_y.first;
cairo_rectangle (cr, _view_rectangle_x.first, _view_rectangle_y.first, width, height);
int32_t width = _view_rectangle_x.second - _view_rectangle_x.first;
int32_t height = _view_rectangle_y.second - _view_rectangle_y.first;
cairo_rectangle (cr, _view_rectangle_x.first, _view_rectangle_y.first, width, height);