Function IsEmptyRect

src/core/geometry_func.hpp:22–25

* Check if a rectangle is empty. * @param r Rectangle to check. * @return True if and only if the rectangle doesn't define space. */

 * @return True if and only if the rectangle doesn't define space.
 */
inline bool IsEmptyRect(const Rect &r)
{
	return (r.left | r.top | r.right | r.bottom) == 0;
}

Rect BoundingRect(const Rect &r1, const Rect &r2);