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Date: Sun, 18 Apr 2004 16:09:53 -0400 (EDT) From: David MacCormack Subject: [SDL] Linux joystick patch I recently got myself a PS2 -> USB converter (a super joybox 5). It accepts 4 PSX/PS2 controllers. It's implemented as a HID, which is nice because it doesn't require its own driver, but the problem is that it's implemented as a *single* HID -- that is, it shows up as a single joystick with 19 axes, 4 hats, and 48 buttons. This poses a problem for a number of apps which use SDL (stella, fce ultra, zsnes, to name a few) and see only a single (physical) joystick even though there are really 4 (logical) joysticks. There are a number of these types of devices on the market, and I've seen others post messages (in the zsnes forum, for example) with the same problem, so I came up with what I think is a pretty generic solution. I patched src/joystick/linux/SDL_sysjoystic.c to include support for logical joysticks; basically, it's a static array and supporting functions that map a single physical joystick to multiple logical joysticks. The attached patch has the new code. It's wrapped inside #ifndef statements so that you can get the old behavior if you want.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 May 2004 18:46:24 +0000
parents 355632dca928
children
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<HTML
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>SDL_JoystickName</TITLE
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><H1
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>SDL_JoystickName</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN6066"
></A
><H2
>Name</H2
>SDL_JoystickName&nbsp;--&nbsp;Get joystick name.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN6069"
></A
><H2
>Synopsis</H2
><DIV
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>const char *<B
CLASS="FSFUNC"
>SDL_JoystickName</B
></CODE
>(int index);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6076"
></A
><H2
>Description</H2
><P
>Get the implementation dependent name of joystick. The <TT
CLASS="PARAMETER"
><I
>index</I
></TT
> parameter refers to the N'th joystick on the system.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6080"
></A
><H2
>Return Value</H2
><P
>Returns a char pointer to the joystick name.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6083"
></A
><H2
>Examples</H2
><P
><PRE
CLASS="PROGRAMLISTING"
>/* Print the names of all attached joysticks */
int num_joy, i;
num_joy=SDL_NumJoysticks();
printf("%d joysticks found\n", num_joy);
for(i=0;i&#60;num_joy;i++)
  printf("%s\n", SDL_JoystickName(i));</PRE
></P
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>See Also</H2
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><TT
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>SDL_JoystickOpen</TT
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