tickit_rect_intersects - test if two rectangles intersect
bool tickit_rect_intersects(const TickitRect *a, const TickitRect *b);
Link with -ltickit.
tickit_rect_intersects() tests whether the two given rectangles intersect
at all. It returns true if there is a non-empty rectangular region in common
covered by both rectangles. tickit_rect_intersect(3) can be used to
obtain this intersection as well as performing the intersection test itself.
tickit_rect_contains() returns a boolean value.