an array of SDL_Point structures representing points to be enclosed.
the number of structures in the points array.
an SDL_Rect used for clipping or NULL to enclose all points.
an SDL_Rect structure filled in with the minimal enclosing rectangle.
true if any points were enclosed or false if all the points were outside of the clipping rectangle.
Calculate a minimal rectangle enclosing a set of points.
If clip is not NULL then only points inside of the clipping rectangle are considered.