4 >SDL_UpdateRects</TITLE
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83 >SDL_UpdateRects -- Makes sure the given list of rectangles is updated on the given screen.</DIV
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99 CLASS="FUNCSYNOPSISINFO"
100 >#include "SDL.h"</PRE
109 >(SDL_Surface *screen, int numrects, SDL_Rect *rects);</CODE
123 >Makes sure the given list of rectangles is updated on the given screen.
124 The rectangles must all be confined within the screen boundaries (no
125 clipping is done).</P
127 >This function should not be called while <TT
134 HREF="sdllocksurface.html"
144 >It is adviced to call this function only once per frame, since each
145 call has some processing overhead. This is no restriction since you
146 can pass any number of rectangles each time.</P
148 >The rectangles are not automatically merged or checked for overlap. In
149 general, the programmer can use his knowledge about his particular
150 rectangles to merge them in an efficient way, to avoid overdraw.</P
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