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Gentoo's Bugzilla – Attachment 26235 Details for
Bug 42702
NEW x11-misc/sphere-eversion screensaver
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vroot.h
vroot.h (text/plain), 4.93 KB, created by
Ed Catmur
on 2004-02-23 21:36:22 UTC
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Description:
vroot.h
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Creator:
Ed Catmur
Created:
2004-02-23 21:36:22 UTC
Size:
4.93 KB
patch
obsolete
>/*****************************************************************************/ >/** Copyright 1991 by Andreas Stolcke **/ >/** Copyright 1990 by Solbourne Computer Inc. **/ >/** Longmont, Colorado **/ >/** **/ >/** All Rights Reserved **/ >/** **/ >/** Permission to use, copy, modify, and distribute this software and **/ >/** its documentation for any purpose and without fee is hereby **/ >/** granted, provided that the above copyright notice appear in all **/ >/** copies and that both that copyright notice and this permis- **/ >/** sion notice appear in supporting documentation, and that the **/ >/** name of Solbourne not be used in advertising **/ >/** in publicity pertaining to distribution of the software without **/ >/** specific, written prior permission. **/ >/** **/ >/** ANDREAS STOLCKE AND SOLBOURNE COMPUTER INC. DISCLAIMS ALL WARRANTIES **/ >/** WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF **/ >/** MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL ANDREAS STOLCKE **/ >/** OR SOLBOURNE BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL **/ >/** DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA **/ >/** OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER **/ >/** TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE **/ >/** OR PERFORMANCE OF THIS SOFTWARE. **/ >/*****************************************************************************/ >/* > * vroot.h -- Virtual Root Window handling header file > * > * This header file redefines the X11 macros RootWindow and DefaultRootWindow, > * making them look for a virtual root window as provided by certain `virtual' > * window managers like swm and tvtwm. If none is found, the ordinary root > * window is returned, thus retaining backward compatibility with standard > * window managers. > * The function implementing the virtual root lookup remembers the result of > * its last invocation to avoid overhead in the case of repeated calls > * on the same display and screen arguments. > * The lookup code itself is taken from Tom LaStrange's ssetroot program. > * > * Most simple root window changing X programs can be converted to using > * virtual roots by just including > * > * #include <X11/vroot.h> > * > * after all the X11 header files. It has been tested on such popular > * X clients as xphoon, xfroot, xloadimage, and xaqua. > * It also works with the core clients xprop, xwininfo, xwd, and editres > * (and is necessary to get those clients working under tvtwm). > * It does NOT work with xsetroot; get the xsetroot replacement included in > * the tvtwm distribution instead. > * > * Andreas Stolcke <stolcke@ICSI.Berkeley.EDU>, 9/7/90 > * - 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 > */ > >#ifndef _VROOT_H_ >#define _VROOT_H_ > >#if !defined(lint) && !defined(SABER) >static char vroot_rcsid[] = "$Id: vroot.h,v 1.1 1995/01/20 15:13:06 spb Exp $"; >#endif > >#include <X11/X.h> >#include <X11/Xatom.h> >#include <X11/Xlib.h> > >static Window >VirtualRootWindowOfScreen(Screen *screen) >{ > static Screen *save_screen = (Screen *)0; > static Window root = (Window)0; > > if (screen != save_screen) { > Display *dpy = DisplayOfScreen(screen); > Atom __SWM_VROOT = None; > int i; > Window rootReturn, parentReturn, *children; > unsigned int numChildren; > > root = RootWindowOfScreen(screen); > > /* go look for a virtual root */ > __SWM_VROOT = XInternAtom(dpy, "__SWM_VROOT", False); > if (XQueryTree(dpy, root, &rootReturn, &parentReturn, > &children, &numChildren)) { > for (i = 0; i < numChildren; i++) { > Atom actual_type; > int actual_format; > unsigned long nitems, bytesafter; > Window *newRoot = (Window *)0; > > if (XGetWindowProperty(dpy, children[i], > __SWM_VROOT, 0, 1, False, XA_WINDOW, > &actual_type, &actual_format, > &nitems, &bytesafter, > (unsigned char **) &newRoot) == Success > && newRoot) { > root = *newRoot; > break; > } > } > if (children) > XFree((char *)children); > } > > save_screen = screen; > } > > return root; >} > >#undef RootWindowOfScreen >#define RootWindowOfScreen(s) VirtualRootWindowOfScreen(s) > >#undef RootWindow >#define RootWindow(dpy,screen) VirtualRootWindowOfScreen(ScreenOfDisplay(dpy,screen)) > >#undef DefaultRootWindow >#define DefaultRootWindow(dpy) VirtualRootWindowOfScreen(DefaultScreenOfDisplay(dpy)) > >#endif /* _VROOT_H_ */
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