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Fixed bug #4 [Note: I'm applying this patch since it's a cleaner version of what's already implemented, and supports this controller on older kernels. I'll ask to make sure this doesn't break on the new kernels where it's no longer necessary] Date: Mon, 21 Mar 2005 09:41:11 -0500 From: Chris Nelson Subject: SDL Patch Hey, Ryan. I submitted the following patch about a year ago. It's just a simple patch for the linux port, to make multiple joysticks each appear to SDL as their own device, if they are on the same USB port (specifically, these guys <http://www.consoleplus.co.uk/product_info.php?pName=super-joybox-5-quad-joypad-converter>, which allow 4 Playstation2 controllers to be accessed via a single USB port). Without this patch, SDL pretty much drops the ball, and reports that there are 4 joysticks available when less than that number are plugged in. My work built upon the work of another person with the same device. When I submitted the patch to the list, he tested it, but it didn't work for him, so the patch was never accepted. Maybe about 3 times in the past year, I've tried to email the guy, to see if he couldn't run my new version, complete with debug code to diagnose the problem he was having. He never got back to me. So, I'm attaching the patch. I wish I knew why it didn't work for him, but I've been using it for the last year with no problems. Let me know if you need any more information, or have any ideas as to how I could test it. I'd like to see it in the tree, but I want to make sure it works. -Chris
author Sam Lantinga <slouken@libsdl.org>
date Sun, 19 Mar 2006 06:31:34 +0000
parents 6fd39b50dd91
children 3ba88cb7eb1b
line wrap: on
line source

/*
 * Copyright 1993-2001 by Xi Graphics, Inc.
 * All Rights Reserved.
 *
 * Please see the LICENSE file accompanying this distribution for licensing 
 * information. 
 *
 * Please send any bug fixes and modifications to src@xig.com.
 *
 * $XiGId: xme.c,v 1.2 2001/11/30 21:56:59 jon Exp $
 *
 */

#define NEED_EVENTS
#define NEED_REPLIES

#include "../../x11/SDL_x11dyn.h"

/*#include <X11/Xlibint.h>*/
#include <X11/Xthreads.h>
#include <X11/Xmd.h>
#include <X11/Xproto.h>
#include <X11/extensions/Xext.h>
#include "../extensions/extutil.h"

/*****************************************************************************/


#define	XIGMISC_PROTOCOL_NAME 		     "XiG-SUNDRY-NONSTANDARD"
#define XIGMISC_MAJOR_VERSION	             2
#define XIGMISC_MINOR_VERSION 	             0

#define XiGMiscNumberEvents	             0

#define	X_XiGMiscQueryVersion		     0
#define	X_XiGMiscQueryViews		     1
#define X_XiGMiscQueryResolutions            2
#define X_XiGMiscChangeResolution            3
#define X_XiGMiscFullScreen                  4

#define sz_xXiGMiscQueryVersionReq	     8
#define sz_xXiGMiscQueryViewsReq	     8
#define sz_xXiGMiscQueryResolutionsReq       8
#define sz_xXiGMiscChangeResolutionReq       16
#define sz_xXiGMiscFullScreenReq             16

#define sz_xXiGMiscQueryVersionReply	     32
#define sz_xXiGMiscQueryViewsReply	     32
#define sz_xXiGMiscQueryResolutionsReply     32
#define sz_xXiGMiscQueryFullScreenReply      32

/*******************************************************************/

typedef struct {
  CARD8         reqType;                /* always codes->major_opcode        */
  CARD8         xigmiscReqType;         /* always X_XiGMiscQueryVersion      */
  CARD16        length;
  CARD16        major;
  CARD16        minor;
} xXiGMiscQueryVersionReq;

typedef struct {
  CARD8         reqType;                /* always codes->major_opcode        */
  CARD8         xigmiscReqType;         /* always X_XiGMiscQueryViews        */
  CARD16        length;
  CARD8		screen;
  CARD8		pad0;
  CARD16	pad1;
} xXiGMiscQueryViewsReq;

typedef struct {
  CARD8         reqType;                /* always codes->major_opcode        */
  CARD8         xigmiscReqType;         /* always X_XiGMiscQueryResolutions  */
  CARD16        length;
  CARD8		screen;
  CARD8		view;
  CARD16	pad0;
} xXiGMiscQueryResolutionsReq;

typedef struct {
  CARD8         reqType;                /* always codes->major_opcode        */
  CARD8         xigmiscReqType;         /* always X_XiGMiscChangeResolution  */
  CARD16        length;
  CARD8		screen;
  CARD8		view;
  CARD16	pad0;
  CARD16        width;
  CARD16        height;
  INT32         refresh;
} xXiGMiscChangeResolutionReq;

typedef struct {
  CARD8         reqType;                /* always codes->major_opcode        */
  CARD8         xigmiscReqType;         /* always X_XiGMiscFullScreen        */
  CARD16        length;
  CARD8		screen;
  CARD8		pad0;
  CARD16	pad1;
  CARD32	window;
  CARD32	cmap;
} xXiGMiscFullScreenReq;

/*******************************************************************/

typedef struct {        
  BYTE          type;                   /* X_Reply                           */
  CARD8         pad0;
  CARD16        sequenceNumber;
  CARD32        length;
  CARD16        major;
  CARD16        minor;
  CARD32        pad1;
  CARD32        pad2;
  CARD32        pad3;
  CARD32        pad4;
  CARD32        pad5;
} xXiGMiscQueryVersionReply;

typedef struct {        
  BYTE          type;                   /* X_Reply                           */
  CARD8         pad0;
  CARD16        sequenceNumber;
  CARD32        length;
  CARD32        nviews;
  CARD32        pad1;
  CARD32        pad2;
  CARD32        pad3;
  CARD32        pad4;
  CARD32        pad5;
} xXiGMiscQueryViewsReply;

typedef struct {        
  BYTE          type;                   /* X_Reply                           */
  CARD8         pad0;
  CARD16        sequenceNumber;
  CARD32        length;
  CARD16        active;
  CARD16        nresolutions;
  CARD32        pad1;
  CARD32        pad2;
  CARD32        pad3;
  CARD32        pad4;
  CARD32        pad5;
} xXiGMiscQueryResolutionsReply;

typedef struct {        
  BYTE          type;                   /* X_Reply                           */
  BOOL          success;
  CARD16        sequenceNumber;
  CARD32        length;
  CARD32        pad1;
  CARD32        pad2;
  CARD32        pad3;
  CARD32        pad4;
  CARD32        pad5;
  CARD32        pad6;
} xXiGMiscFullScreenReply;

/*******************************************************************/

typedef struct {        
  INT16		x;
  INT16		y;
  CARD16	w;
  CARD16	h;
} XiGMiscViewInfo;

typedef struct {        
  CARD16        width;
  CARD16        height;
  INT32         refresh;
} XiGMiscResolutionInfo;

/*****************************************************************************/

static XExtensionInfo *xigmisc_info = NULL;
static char *xigmisc_extension_name = XIGMISC_PROTOCOL_NAME;

#define XiGMiscCheckExtension(dpy,i,val) \
  XextCheckExtension (dpy, i, xigmisc_extension_name, val)
#define XiGMiscSimpleCheckExtension(dpy,i) \
  XextSimpleCheckExtension (dpy, i, xigmisc_extension_name)

#if defined(__STDC__) && !defined(UNIXCPP)
#define XiGMiscGetReq(name,req,info) GetReq (name, req); \
        req->reqType = info->codes->major_opcode; \
        req->xigmiscReqType = X_##name;

#define XiGMiscGetReqExtra(name,n,req,info) GetReqExtra (name, n, req); \
        req->reqType = info->codes->major_opcode; \
        req->xigmicReqType = X_##name;
#else
#define XiGMiscGetReq(name,req,info) GetReq (name, req); \
        req->reqType = info->codes->major_opcode; \
        req->xigmiscReqType = X_/**/name;
#define XiGMiscGetReqExtra(name,n,req,info) GetReqExtra (name, n, req); \
        req->reqType = info->codes->major_opcode; \
        req->xigmiscReqType = X_/**/name;
#endif



/*
 * find_display - locate the display info block
 */
static int XiGMiscCloseDisplay();

static XExtensionHooks xigmisc_extension_hooks = {
    NULL,                               /* create_gc */
    NULL,                               /* copy_gc */
    NULL,                               /* flush_gc */
    NULL,                               /* free_gc */
    NULL,                               /* create_font */
    NULL,                               /* free_font */
    XiGMiscCloseDisplay,                /* close_display */
    NULL,                               /* wire_to_event */
    NULL,                               /* event_to_wire */
    NULL,                               /* error */
    NULL,                               /* error_string */
};


static XEXT_GENERATE_CLOSE_DISPLAY (XiGMiscCloseDisplay, xigmisc_info)

static XEXT_GENERATE_FIND_DISPLAY (XiGMiscFindDisplay, xigmisc_info,
				   xigmisc_extension_name, 
				   &xigmisc_extension_hooks, XiGMiscNumberEvents, NULL)


/*****************************************************************************/

Bool XiGMiscQueryVersion(Display *dpy, int *major, int *minor)
{
  int opcode, event, error;
  xXiGMiscQueryVersionReq *req;
  xXiGMiscQueryVersionReply rep;
  XExtDisplayInfo *info = XiGMiscFindDisplay(dpy);

  if (!pXQueryExtension(dpy, XIGMISC_PROTOCOL_NAME, &opcode, &event, &error))
    return xFalse;

  XiGMiscCheckExtension(dpy, info, xFalse);

  LockDisplay (dpy);
  XiGMiscGetReq (XiGMiscQueryVersion, req, info);

  req->major = XIGMISC_MAJOR_VERSION;
  req->minor = XIGMISC_MINOR_VERSION;

  if (!p_XReply (dpy, (xReply *)&rep, 0, xTrue)) {
    UnlockDisplay(dpy);
    SyncHandle();
    return xFalse;
  }

  *major = rep.major;
  *minor = rep.minor;
  UnlockDisplay(dpy);
  SyncHandle();

  return xTrue;
}

int XiGMiscQueryViews(Display *dpy, int screen, XiGMiscViewInfo **pviews)
{
  int n, size;
  XiGMiscViewInfo *views;
  xXiGMiscQueryViewsReq *req;
  xXiGMiscQueryViewsReply rep;
  XExtDisplayInfo *info = XiGMiscFindDisplay(dpy);
  XiGMiscCheckExtension(dpy, info, 0);

  LockDisplay (dpy);
  XiGMiscGetReq (XiGMiscQueryViews, req, info);
  req->screen = screen;

  if (!p_XReply (dpy, (xReply *)&rep, 0, xFalse)) {
    UnlockDisplay(dpy);
    SyncHandle();
    return 0;
  }

  n = rep.nviews;

  if (n > 0) {
    size = sizeof(XiGMiscViewInfo) * n;
    views = (XiGMiscViewInfo*)Xmalloc(size);
    if (!views) {
      p_XEatData(dpy, (unsigned long)size);
      UnlockDisplay(dpy);
      SyncHandle();
      return 0;
    }

    p_XReadPad(dpy, (void*)views, size);

    *pviews = views;
  }

  UnlockDisplay(dpy);
  SyncHandle();

  return n;
}

int XiGMiscQueryResolutions(Display *dpy, int screen, int view, int *pactive, XiGMiscResolutionInfo **presolutions)
{
  int n, size;
  XiGMiscResolutionInfo *resolutions;
  xXiGMiscQueryResolutionsReq *req;
  xXiGMiscQueryResolutionsReply rep;
  XExtDisplayInfo *info = XiGMiscFindDisplay(dpy);
  XiGMiscCheckExtension(dpy, info, 0);

  LockDisplay (dpy);
  XiGMiscGetReq (XiGMiscQueryResolutions, req, info);
  req->screen = screen;
  req->view   = view;

  if (!p_XReply (dpy, (xReply *)&rep, 0, xFalse)) {
    UnlockDisplay(dpy);
    SyncHandle();
    return 0;
  }

  n = rep.nresolutions;

  if (n > 0) {
    size = sizeof(XiGMiscResolutionInfo) * n;
    resolutions = (XiGMiscResolutionInfo*)Xmalloc(size);
    if (!resolutions) {
      p_XEatData(dpy, (unsigned long)size);
      UnlockDisplay(dpy);
      SyncHandle();
      return 0;
    }

    p_XReadPad(dpy, (void*)resolutions, size);

    *presolutions = resolutions;
    *pactive = rep.active;
  }

  UnlockDisplay(dpy);
  SyncHandle();

  return n;
}

void XiGMiscChangeResolution(Display *dpy, int screen, int view, int width, int height, int refresh)
{
  xXiGMiscChangeResolutionReq *req;
  XExtDisplayInfo *info = XiGMiscFindDisplay(dpy);

  XiGMiscSimpleCheckExtension(dpy, info);

  LockDisplay (dpy);
  XiGMiscGetReq (XiGMiscChangeResolution, req, info);
  req->screen = screen;
  req->view = view;
  req->width = width;
  req->height = height;
  req->refresh = refresh;

  UnlockDisplay(dpy);
  SyncHandle();
}


Bool XiGMiscFullScreen(Display *dpy, int screen, XID window, XID cmap)
{
  xXiGMiscFullScreenReq *req;
  xXiGMiscFullScreenReply rep;
  XExtDisplayInfo *info = XiGMiscFindDisplay(dpy);

  XiGMiscCheckExtension(dpy, info, xFalse);

  LockDisplay (dpy);
  XiGMiscGetReq (XiGMiscFullScreen, req, info);
  req->screen = screen;
  req->pad0 = 0;
  req->pad1 = 0;
  req->window = window;
  req->cmap = cmap;

  if (!p_XReply (dpy, (xReply *)&rep, 0, xTrue)) {
    UnlockDisplay(dpy);
    SyncHandle();
    return xFalse;
  }

  UnlockDisplay(dpy);
  SyncHandle();

  return (rep.success ? xTrue : xFalse);
}