Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_SetTimer.3 @ 3087:0b6f51c29267
Date: Wed, 4 Mar 2009 15:38:22 +0200
From: "Mike Gorchak"
Subject: Re: About QNX support in SDL 1.3
Here is another batch of patches.
1) Makefile.in - added SDL_opengles.h header as header to install.
2) configure.in - Added special define to detect Common Lite OpenGL ES
library in case if Common library is not installed. Added check for
clock_gettime in libc (in QNX it is in libc).
3) SDL_config.h.in - Added SDL_VIDEO_RENDER_OPENGL_ES and
SDL_VIDEO_OPENGL_ES declarations for configure script autodetection.
4) SDL_opengles.h - Added GL_API definition if it is not defined. Added
extension GL_OES_draw_texture because OpenGL ES Renderer uses it without
declaration. Added GL_OES_vertex_buffer_object extension, which is supported
under QNX OpenGL ES. Added GL_OES_single_precision extension.
5) To the test directory I've added building OpenGL ES test applications
through the autotools suite. Was support for iPhone IDE building only.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 04 Mar 2009 15:10:47 +0000 |
| parents | 546f7c1eb755 |
| children | 1238da4a7112 |
| rev | line source |
|---|---|
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1 .TH "SDL_SetTimer" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
|
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546f7c1eb755
Merged revision 3472 from SDL 1.2, fixing bug #493
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3 SDL_SetTimer \- Set a callback to run after the specified number of milliseconds has elapsed\&. |
| 0 | 4 .SH "SYNOPSIS" |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBint \fBSDL_SetTimer\fP\fR(\fBUint32 interval, SDL_TimerCallback callback\fR); | |
| 9 .SH "CALLBACK" | |
| 10 .PP | |
| 11 /* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval); | |
| 12 .SH "DESCRIPTION" | |
| 13 .PP | |
| 14 Set a callback to run after the specified number of milliseconds has elapsed\&. The callback function is passed the current timer interval and returns the next timer interval\&. If the returned value is the same as the one passed in, the periodic alarm continues, otherwise a new alarm is scheduled\&. | |
| 15 .PP | |
| 16 To cancel a currently running timer, call \fBSDL_SetTimer(0, NULL);\fP | |
| 17 .PP | |
| 18 The timer callback function may run in a different thread than your main constant, and so shouldn\&'t call any functions from within itself\&. | |
| 19 .PP | |
| 20 The maximum resolution of this timer is 10 ms, which means that if you request a 16 ms timer, your callback will run approximately 20 ms later on an unloaded system\&. If you wanted to set a flag signaling a frame update at 30 frames per second (every 33 ms), you might set a timer for 30 ms (see example below)\&. | |
| 21 .PP | |
| 22 If you use this function, you need to pass \fBSDL_INIT_TIMER\fP to \fBSDL_Init()\fP\&. | |
| 23 .PP | |
| 24 .RS | |
| 25 \fBNote: | |
| 26 .PP | |
|
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Added new docs for SDL 1.2.1
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27 This function is kept for compatibility but has been superseded by the new timer functions \fISDL_AddTimer\fR and \fISDL_RemoveTimer\fR which support multiple timers\&. |
| 0 | 28 .RE |
| 29 .SH "EXAMPLES" | |
| 30 .PP | |
| 31 .PP | |
| 32 .nf | |
| 33 \f(CWSDL_SetTimer((33/10)*10, my_callback);\fR | |
| 34 .fi | |
| 35 .PP | |
| 36 .SH "SEE ALSO" | |
| 37 .PP | |
| 38 \fI\fBSDL_AddTimer\fP\fR | |
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
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39 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |