Mercurial > sdl-ios-xcode
view docs/html/sdlinitsubsystem.html @ 896:b56dc586a5ef
Date: Tue, 16 Mar 2004 12:40:33 +0000
From: Alan Swanson
Subject: [SDL] [PATCH] Linux joystick evdev axis count fix
The event device configuration under Linux does not check the returned
ioctl value when reading the axis information. This means extra
undefined axes are returned.
Note, in EV_HandleEvents, the default for case EV_ABS is to return any
axis information which is fine as we have already checked for all valid
absolute axes. No new axes should be returned after opening the device.
(Unless, of course, the evdev allows closing and reassigning a new
device while in use and I can't believe that happens.)
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 16 May 2004 22:48:06 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_InitSubSystem</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="General" HREF="general.html"><LINK REL="PREVIOUS" TITLE="SDL_Init" HREF="sdlinit.html"><LINK REL="NEXT" TITLE="SDL_QuitSubSystem" HREF="sdlquitsubsystem.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdlinit.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlquitsubsystem.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLINITSUBSYSTEM" ></A >SDL_InitSubSystem</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN510" ></A ><H2 >Name</H2 >SDL_InitSubSystem -- Initialize subsystems</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN513" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN514" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >int <B CLASS="FSFUNC" >SDL_InitSubSystem</B ></CODE >(Uint32 flags);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN520" ></A ><H2 >Description</H2 ><P >After SDL has been initialized with <A HREF="sdlinit.html" ><TT CLASS="FUNCTION" >SDL_Init</TT ></A > you may initialize uninitialized subsystems with <TT CLASS="FUNCTION" >SDL_InitSubSystem</TT >. The <TT CLASS="PARAMETER" ><I >flags</I ></TT > parameter is the same as that used in <A HREF="sdlinit.html" ><TT CLASS="FUNCTION" >SDL_Init</TT ></A >.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN529" ></A ><H2 >Examples</H2 ><PRE CLASS="PROGRAMLISTING" >/* Seperating Joystick and Video initialization. */ SDL_Init(SDL_INIT_VIDEO); . . SDL_SetVideoMode(640, 480, 16, SDL_DOUBLEBUF|SDL_FULLSCREEN); . /* Do Some Video stuff */ . . /* Initialize the joystick subsystem */ SDL_InitSubSystem(SDL_INIT_JOYSTICK); /* Do some stuff with video and joystick */ . . . /* Shut them both down */ SDL_Quit();</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN532" ></A ><H2 >Return Value</H2 ><P >Returns <SPAN CLASS="RETURNVALUE" >-1</SPAN > on an error or <SPAN CLASS="RETURNVALUE" >0</SPAN > on success.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN537" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlinit.html" ><TT CLASS="FUNCTION" >SDL_Init</TT ></A >, <A HREF="sdlquit.html" ><TT CLASS="FUNCTION" >SDL_Quit</TT ></A >, <A HREF="sdlquitsubsystem.html" ><TT CLASS="FUNCTION" >SDL_QuitSubSystem</TT ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlinit.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdlquitsubsystem.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_Init</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="general.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_QuitSubSystem</TD ></TR ></TABLE ></DIV ></BODY ></HTML >