IABSD.fr/xenocara/lib/libXp/src/XpScreens.c

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• Author : matthieu
  Date : 2006-11-25 17:22:40
  Hash : 19d7c699
  Message : import from X.Org 7.2RC2

• lib/libXp/src/XpScreens.c

• /* $Xorg: XpScreens.c,v 1.5 2000/08/17 19:46:08 cpqbld Exp $ */
  /******************************************************************************
   ******************************************************************************
   **
   ** (c) Copyright 1996 Hewlett-Packard Company
   ** (c) Copyright 1996 International Business Machines Corp.
   ** (c) Copyright 1996 Sun Microsystems, Inc.
   ** (c) Copyright 1996 Novell, Inc.
   ** (c) Copyright 1996 Digital Equipment Corp.
   ** (c) Copyright 1996 Fujitsu Limited
   ** (c) Copyright 1996 Hitachi, Ltd.
   ** 
   ** Permission is hereby granted, free of charge, to any person obtaining a copy
   ** of this software and associated documentation files (the "Software"), to deal
   ** in the Software without restriction, including without limitation the rights
   ** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   ** copies of the Software, and to permit persons to whom the Software is
   ** furnished to do so, subject to the following conditions:
   **
   ** The above copyright notice and this permission notice shall be included in
   ** all copies or substantial portions of the Software.
   **
   ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   ** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
   ** COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   ** IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   ** CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   **
   ** Except as contained in this notice, the names of the copyright holders shall
   ** not be used in advertising or otherwise to promote the sale, use or other
   ** dealings in this Software without prior written authorization from said
   ** copyright holders.
   **
   ******************************************************************************
   *****************************************************************************/
  /* $XFree86: xc/lib/Xp/XpScreens.c,v 1.5 2001/04/01 14:00:02 tsi Exp $ */
  
  #define NEED_REPLIES
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  #include <X11/extensions/Printstr.h>
  #include <X11/Xlibint.h>
  #include "XpExtUtil.h"
  
  
  Screen **
  XpQueryScreens (
      Display     *dpy,
      int         *list_count             /* return value */
  )
  {
      xPrintQueryScreensReq     *req;
      xPrintQueryScreensReply   rep;
  
      /* For decoding the variable portion of Reply */
      long	rootWindow;
  
      /* For converting root winID to corresponding ScreenPtr */
      Screen **scr_list;
      Screen *checkScr;
      int    i,j;
  
      XExtDisplayInfo *info = (XExtDisplayInfo *) xp_find_display (dpy);
  
  
      if (XpCheckExtInit(dpy, XP_DONT_CHECK) == -1)
          return ( (Screen **) NULL ); /* No such extension */
  
      LockDisplay (dpy);
  
      GetReq(PrintQueryScreens,req);
      req->reqType = info->codes->major_opcode;
      req->printReqType = X_PrintQueryScreens;
  
      if (! _XReply (dpy, (xReply *) &rep, 0, xFalse)) {
          UnlockDisplay(dpy);
          SyncHandle();
          return ( (Screen **) NULL ); /* error */
      }
  
      *list_count = rep.listCount;
  
      if (*list_count) {
  	scr_list = (Screen **)
  		   Xmalloc( (unsigned) (sizeof(Screen *) * *list_count) );
  
  	if (!scr_list) {
              UnlockDisplay(dpy);
              SyncHandle();
              return ( (Screen **) NULL ); /* malloc error */
  	}
  	i = 0;
  	while(i < *list_count){
  	    /*
  	     * Pull printer length and then name.
  	     */
  	    _XRead32 (dpy, &rootWindow, (long) sizeof(CARD32) );
  	    scr_list[i] = NULL;
  	    for ( j = 0; j < XScreenCount(dpy); j++ ) {
  		checkScr = XScreenOfDisplay(dpy, j);
  		if ( XRootWindowOfScreen(checkScr) == (Window) rootWindow  ) {
  		    scr_list[i] = checkScr;
  		    break;
  		}
  	    }
  	    if(scr_list[i] == NULL)
  		(*list_count)--;
  	    else
  		i++;
  	}
  	if(!(*list_count)) {
  	    Xfree(scr_list);
  	    scr_list = (Screen **) NULL;
  	}
      }
      else {
  	scr_list = (Screen **) NULL;
      }
  
      UnlockDisplay(dpy);
      SyncHandle();
  
      return ( scr_list );
  }