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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_PushEvent</TITLE
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>SDL_PushEvent</H1
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><H2
>Name</H2
>SDL_PushEvent&nbsp;--&nbsp;Pushes an event onto the event queue</DIV
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><H2
>Synopsis</H2
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><P
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><PRE
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>#include "SDL.h"</PRE
><P
><CODE
><CODE
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>int <B
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>SDL_PushEvent</B
></CODE
>(SDL_Event *event);</CODE
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><H2
>Description</H2
><P
>The event queue can actually be used as a two way communication channel. Not only can events be read from the queue, but the user can also push their own events onto it. <TT
CLASS="PARAMETER"
><I
>event</I
></TT
> is a pointer to the event structure you wish to push onto the queue.</P
><DIV
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><BLOCKQUOTE
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><B
>Note: </B
>Pushing device input events onto the queue doesn't modify the state of the device within SDL.</P
></BLOCKQUOTE
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><H2
>Return Value</H2
><P
>Returns <SPAN
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>0</SPAN
> on success or <SPAN
CLASS="RETURNVALUE"
>-1</SPAN
> if the event couldn't be pushed.</P
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>See <A
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>SDL_Event</SPAN
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>.</P
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