ftp://ftp.linux.ncsu.edu/mirror/ftp.redhat.com/pub/redhat/linux/enterprise/4/en/os...

[xscreensaver] / utils / grabscreen.c

diff --git a/utils/grabscreen.c b/utils/grabscreen.c
index 5ef32e1e9c899005abfb0805ba572f1bdde30ecb..cc5b57522de05d06d31e8cee2811fc4eae033797 100644 (file)
--- a/utils/grabscreen.c
+++ b/utils/grabscreen.c
@@ -1,4 +1,4 @@
-/* xscreensaver, Copyright (c) 1992, 1993, 1994, 1997, 1998
+/* xscreensaver, Copyright (c) 1992, 1993, 1994, 1997, 1998, 2003, 2004
  *  Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
@@ -117,12 +117,12 @@ xscreensaver_window_p (Display *dpy, Window window)
   Atom type;
   int format;
   unsigned long nitems, bytesafter;
-  char *version;
+  unsigned char *version;
   if (XGetWindowProperty (dpy, window,
                          XInternAtom (dpy, "_SCREENSAVER_VERSION", False),
                          0, 1, False, XA_STRING,
                          &type, &format, &nitems, &bytesafter,
-                         (unsigned char **) &version)
+                         &version)
       == Success
       && type != None)
     return True;
@@ -133,7 +133,6 @@ xscreensaver_window_p (Display *dpy, Window window)
 
 /* Whether the given window is:
    - the real root window;
-   - the virtual root window;
    - a direct child of the root window;
    - a direct child of the window manager's decorations.
  */
@@ -142,20 +141,16 @@ top_level_window_p (Screen *screen, Window window)
 {
   Display *dpy = DisplayOfScreen (screen);
   Window root, parent, *kids;
-  Window vroot = VirtualRootWindowOfScreen(screen);
   unsigned int nkids;
 
-  if (window == vroot)
-    return True;
-
   if (!XQueryTree (dpy, window, &root, &parent, &kids, &nkids))
     return False;
 
   if (window == root)
     return True;
 
-  /* If our direct parent is the root (or *a* root), then yes. */
-  if (parent == root || parent == vroot)
+  /* If our direct parent is the real root window, then yes. */
+  if (parent == root)
     return True;
   else
     {
@@ -183,11 +178,12 @@ top_level_window_p (Screen *screen, Window window)
 }
 
 
-
+static Bool error_handler_hit_p = False;
 static XErrorHandler old_ehandler = 0;
 static int
 BadWindow_ehandler (Display *dpy, XErrorEvent *error)
 {
+  error_handler_hit_p = True;
   if (error->error_code == BadWindow || error->error_code == BadDrawable)
     return 0;
   else if (!old_ehandler)
@@ -227,17 +223,18 @@ use_subwindow_mode_p(Screen *screen, Window window)
 static void
 install_screen_colormaps (Screen *screen)
 {
-  int i;
+  unsigned int i;
   Display *dpy = DisplayOfScreen (screen);
-  Window vroot, real_root;
+  Window real_root;
   Window parent, *kids = 0;
   unsigned int nkids = 0;
 
   XSync (dpy, False);
   old_ehandler = XSetErrorHandler (BadWindow_ehandler);
+  error_handler_hit_p = False;
 
-  vroot = VirtualRootWindowOfScreen (screen);
-  if (XQueryTree (dpy, vroot, &real_root, &parent, &kids, &nkids))
+  real_root = XRootWindowOfScreen (screen);  /* not vroot */
+  if (XQueryTree (dpy, real_root, &real_root, &parent, &kids, &nkids))
     for (i = 0; i < nkids; i++)
       {
        XWindowAttributes xgwa;
@@ -263,16 +260,23 @@ install_screen_colormaps (Screen *screen)
 
 
 void
-grab_screen_image (Screen *screen, Window window)
+grab_screen_image_internal (Screen *screen, Window window)
 {
   Display *dpy = DisplayOfScreen (screen);
   XWindowAttributes xgwa;
-  Window real_root = XRootWindowOfScreen (screen);  /* not vroot */
-  Bool root_p = (window == real_root);
-  Bool saver_p = xscreensaver_window_p (dpy, window);
+  Window real_root;
+  Bool root_p;
+  Bool saver_p;
   Bool grab_mouse_p = False;
   int unmap_time = 0;
 
+  real_root = XRootWindowOfScreen (screen);  /* not vroot */
+  root_p = (window == real_root);
+  saver_p = xscreensaver_window_p (dpy, window);
+
+  XGetWindowAttributes (dpy, window, &xgwa);
+  screen = xgwa.screen;
+
   if (saver_p)
     /* I think this is redundant, but just to be safe... */
     root_p = False;
@@ -300,15 +304,13 @@ grab_screen_image (Screen *screen, Window window)
 
   if (grab_verbose_p)
     {
-      XWindowAttributes xgwa2;
       fprintf(stderr,
               "\n%s: window 0x%08lX root: %d saver: %d grab: %d wait: %.1f\n",
               progname, (unsigned long) window,
               root_p, saver_p, grab_mouse_p, ((double)unmap_time)/1000000.0);
 
-      XGetWindowAttributes (dpy, window, &xgwa2);
       fprintf(stderr, "%s: ", progname);
-      describe_visual(stderr, screen, xgwa2.visual, False);
+      describe_visual(stderr, screen, xgwa.visual, False);
       fprintf (stderr, "\n");
     }
 
@@ -344,8 +346,6 @@ grab_screen_image (Screen *screen, Window window)
       usleep(unmap_time); /* wait for everyone to swap in and handle exposes */
     }
 
-  XGetWindowAttributes (dpy, window, &xgwa);
-
   if (!root_p)
     {
 #ifdef HAVE_READ_DISPLAY_EXTENSION
@@ -371,15 +371,13 @@ grab_screen_image (Screen *screen, Window window)
   else  /* root_p */
     {
       Pixmap pixmap;
-      XWindowAttributes xgwa;
-      XGetWindowAttributes(dpy, window, &xgwa);
       pixmap = XCreatePixmap(dpy, window, xgwa.width, xgwa.height, xgwa.depth);
 
 #ifdef HAVE_READ_DISPLAY_EXTENSION
       if (! read_display(screen, window, pixmap, True))
 #endif
        {
-         Window real_root = XRootWindowOfScreen (xgwa.screen); /* not vroot */
+         Window real_root = XRootWindowOfScreen (screen); /* not vroot */
          XGCValues gcv;
          GC gc;