SDL_UpdateRects man page on JazzOS

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SDL_UpdateRects(3)	       SDL API Reference	    SDL_UpdateRects(3)

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

       #include "SDL.h"

       void  SDL_UpdateRects(SDL_Surface  *screen,  int	  numrects,   SDL_Rect

       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.


	      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 over‐
	      lap. In general, the programmer can use his knowledge about  his
	      particular  rectangles  to  merge	 them  in an efficient way, to
	      avoid overdraw.

       SDL_UpdateRect, SDL_Rect, SDL_Surface, SDL_LockSurface

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

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