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1 | .TH "SDL_UpdateRects" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
2 | .SH "NAME" |
3 | SDL_UpdateRects \- Makes sure the given list of rectangles is updated on the given screen\&. |
4 | .SH "SYNOPSIS" |
5 | .PP |
6 | \fB#include "SDL\&.h" |
7 | .sp |
8 | \fBvoid \fBSDL_UpdateRects\fP\fR(\fBSDL_Surface *screen, int numrects, SDL_Rect *rects\fR); |
9 | .SH "DESCRIPTION" |
10 | .PP |
11 | 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)\&. |
12 | .PP |
13 | This function should not be called while \fBscreen\fR is \fIlocked\fR\&. |
14 | .PP |
15 | .RS |
16 | \fBNote: |
17 | .PP |
18 | 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\&. |
19 | .PP |
20 | 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\&. |
21 | .RE |
22 | .SH "SEE ALSO" |
23 | .PP |
24 | \fI\fBSDL_UpdateRect\fP\fR, \fI\fBSDL_Rect\fR\fR, \fI\fBSDL_Surface\fR\fR, \fI\fBSDL_LockSurface\fP\fR |
25 | .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |