SDL_UpdateRects - Makes sure the given list of rectangles is updated on the given screen.

       Makes  sure  the  given  list  of  rectangles  is updated on the given screen. The rectangles must all be
       confined within the screen boundaries (no clipping is done).

       This function should not be called while screen is locked.

              Note:

              It is adviced to call this function only once per frame,  since  each  call  has  some  processing
              overhead. This is no restriction since you can pass any number of rectangles each time.

              The rectangles are not automatically merged or checked for overlap. In general, the programmer can
              use  his  knowledge  about  his  particular rectangles to merge them in an efficient way, to avoid
              overdraw.

       SDL_UpdateRects - Makes sure the given list of rectangles is updated on the given screen.

SDL_UpdateRect, SDL_Rect, SDL_Surface, SDL_LockSurface

SDL                                          Tue 11 Sep 2001, 23:01                           SDL_UpdateRects(3)

#include"SDL.h"voidSDL_UpdateRects(SDL_Surface*screen,intnumrects,SDL_Rect*rects);