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RedHat 9 (Linux i386) - man page for sdl_updaterects (redhat section 3)

SDL_UpdateRects(3)			SDL API Reference		       SDL_UpdateRects(3)

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 rec-
	      tangles 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

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


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