| .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 |
