NAME

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

SYNOPSIS

       #include "SDL.h"

       void SDL_UpdateRects(SDL_Surface *screen, int numrects, SDL_Rect *rects);

DESCRIPTION

       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.

SEE ALSO

       SDL_UpdateRect, SDL_Rect, SDL_Surface, SDL_LockSurface