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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
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>General</TITLE
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><DIV
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>Chapter 5. General</H1
><DIV
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><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
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>SDL_Init</A
>&nbsp;--&nbsp;Initializes SDL</DT
><DT
><A
HREF="sdlinitsubsystem.html"
>SDL_InitSubSystem</A
>&nbsp;--&nbsp;Initialize subsystems</DT
><DT
><A
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>SDL_QuitSubSystem</A
>&nbsp;--&nbsp;Shut down a subsystem</DT
><DT
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>SDL_Quit</A
>&nbsp;--&nbsp;Shut down SDL</DT
><DT
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>SDL_WasInit</A
>&nbsp;--&nbsp;Check which subsystems are initialized</DT
><DT
><A
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>SDL_GetError</A
>&nbsp;--&nbsp;Get SDL error string</DT
><DT
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>SDL_envvars</A
>&nbsp;--&nbsp;SDL environment variables</DT
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><P
>Before SDL can be used in a program it must be initialized with <A
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><TT
CLASS="FUNCTION"
>SDL_Init</TT
></A
>. <TT
CLASS="FUNCTION"
>SDL_Init</TT
> initializes all the subsystems that the user requests (video, audio, joystick, timers and/or cdrom). Once SDL is initialized with <TT
CLASS="FUNCTION"
>SDL_Init</TT
> subsystems can be shut down and initialized as needed using <A
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><TT
CLASS="FUNCTION"
>SDL_InitSubSystem</TT
></A
> and <A
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><TT
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>SDL_QuitSubSystem</TT
></A
>.</P
><P
>SDL must also be shut down before the program exits to make sure it cleans up correctly. Calling <A
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>SDL_Quit</TT
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> shuts down all subsystems and frees any resources allocated to SDL.</P
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