.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"

.PP

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)\&.

.PP

This function should not be called while \fBscreen\fR is \fIlocked\fR\&.

.PP

.RS

\fBNote:  

.PP

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\&.

.PP

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\&.

.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