ref: b76e8ecc732cb311ceee6fd6c807b7e784d3fe31
dir: /sys/src/ape/X11/lib/Xp/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 );
}