.TH "SDL_UpdateRects" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME"SDL_UpdateRects\- Makes sure the given list of rectangles is updated on the given screen\&..SH "SYNOPSIS".PP\fB#include "SDL\&.h".sp\fBvoid \fBSDL_UpdateRects\fP\fR(\fBSDL_Surface *screen, int numrects, SDL_Rect *rects\fR);.SH "DESCRIPTION".PPMakes 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)\&..PPThis function should not be called while \fBscreen\fR is \fIlocked\fR\&..PP.RS\fBNote:  .PPIt 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\&..PPThe 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\&..RE.SH "SEE ALSO".PP\fI\fBSDL_UpdateRect\fP\fR, \fI\fBSDL_Rect\fR\fR, \fI\fBSDL_Surface\fR\fR, \fI\fBSDL_LockSurface\fP\fR...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01