+/* -*- Mode: C; tab-width: 2 -*- */
/*****************************************************************************/
/** Copyright 1991 by Andreas Stolcke **/
/** Copyright 1990 by Solbourne Computer Inc. **/
* - replaced all NULL's with properly cast 0's, 5/6/91
* - free children list (suggested by Mark Martin <mmm@cetia.fr>), 5/16/91
* - include X11/Xlib.h and support RootWindowOfScreen, too 9/17/91
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 28-Apr-1997
+ * - use ANSI C
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 3-Sep-2003
+ * - if the environment variable "XSCREENSAVER_WINDOW" is set, use that
+ * as the root window instead of searching for __SWM_VROOT.
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 14-Aug-2004
+ * - changes to get gcc to stop whining about "type punning".
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 16-Dec-2004
+ * - fixed that last fix.
*/
#ifndef _VROOT_H_
#define _VROOT_H_
+#define _XSCREENSAVER_VROOT_H_
#if !defined(lint) && !defined(SABER)
-static const char vroot_rcsid[] = "#Id: vroot.h,v 1.4 1991/09/30 19:23:16 stolcke Exp stolcke #";
+static const char vroot_rcsid[] =
+ "#Id: vroot.h,v 1.8 2004/12/16 05:33:54 jwz Exp #" "\n"
+ "#Id: vroot.h,v 1.4 1991/09/30 19:23:16 stolcke Exp stolcke #";
#endif
#include <X11/X.h>
Window rootReturn, parentReturn, *children;
unsigned int numChildren;
+ /* first check for a hex or decimal window ID in the environment */
+ const char *xss_id = getenv("XSCREENSAVER_WINDOW");
+ if (xss_id && *xss_id) {
+ unsigned long id = 0;
+ char c;
+ if (1 == sscanf (xss_id, " 0x%lx %c", &id, &c) ||
+ 1 == sscanf (xss_id, " %lu %c", &id, &c)) {
+ root = (Window) id;
+ save_screen = screen;
+ return root;
+ }
+ }
+
root = RootWindowOfScreen(screen);
/* go look for a virtual root */
Atom actual_type;
int actual_format;
unsigned long nitems, bytesafter;
- Window *newRoot = (Window *)0;
+ unsigned char *newRoot = 0;
if (XGetWindowProperty(dpy, children[i],
__SWM_VROOT, 0, 1, False, XA_WINDOW,
&actual_type, &actual_format,
&nitems, &bytesafter,
- (unsigned char **) &newRoot) == Success
+ &newRoot) == Success
&& newRoot) {
- root = *newRoot;
+ root = *((Window *) newRoot);
break;
}
}