handle the client having a shape mask, fixes #101806

2003-01-05  Havoc Pennington  <hp@pobox.com>

	* src/frames.c (meta_frames_apply_shapes): handle
	the client having a shape mask, fixes #101806

	* src/core.c (meta_core_get_client_xwindow): new function

	* src/frame.c, src/frame.h: keep a flag for whether we need to
	update the frame shape

	* src/window.c (meta_window_new): select for ShapeNotify

	* src/display.h, src/display.c: actually query the shape
	extension, instead of just using it all over the place.

	* src/prefs.c (update_application_based): don't let people turn on
	application_based, as it just causes funky bugs. We can reenable
	the pref when/if it ever does something useful.

16 files changed, 370 insertions, 52 deletions

diff --git a/ChangeLog b/ChangeLog
index b7ea7109..45288b35 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+2003-01-05  Havoc Pennington  <hp@pobox.com>
+
+	* src/frames.c (meta_frames_apply_shapes): handle 
+	the client having a shape mask, fixes #101806
+	
+	* src/core.c (meta_core_get_client_xwindow): new function
+
+	* src/frame.c, src/frame.h: keep a flag for whether we need to 
+	update the frame shape
+	
+	* src/window.c (meta_window_new): select for ShapeNotify
+
+	* src/display.h, src/display.c: actually query the shape
+	extension, instead of just using it all over the place.
+
+	* src/prefs.c (update_application_based): don't let people turn on
+	application_based, as it just causes funky bugs. We can reenable
+	the pref when/if it ever does something useful.
+
 2003-01-03  Havoc Pennington  <hp@redhat.com>
 
 	* src/display.c: include the Xrandr header file
diff --git a/src/core.c b/src/core.c
index 49dda84b..ee7ff2d4 100644
--- a/src/core.c
+++ b/src/core.c
@@ -46,6 +46,22 @@ meta_core_get_client_size (Display *xdisplay,
     *height = window->rect.height;
 }
 
+Window
+meta_core_get_client_xwindow (Display *xdisplay,
+                              Window   frame_xwindow)
+{
+  MetaDisplay *display;
+  MetaWindow *window;
+  
+  display = meta_display_for_x_display (xdisplay);
+  window = meta_display_lookup_x_window (display, frame_xwindow);
+
+  if (window == NULL || window->frame == NULL)
+    meta_bug ("No such frame window 0x%lx!\n", frame_xwindow);
+
+  return window->xwindow;
+}
+
 MetaFrameFlags
 meta_core_get_frame_flags (Display *xdisplay,
                            Window   frame_xwindow)
diff --git a/src/core.h b/src/core.h
index cc02d5a0..be4065a1 100644
--- a/src/core.h
+++ b/src/core.h
@@ -31,6 +31,9 @@ void meta_core_get_client_size (Display *xdisplay,
                                 int     *width,
                                 int     *height);
 
+Window meta_core_get_client_xwindow (Display *xdisplay,
+                                     Window   frame_xwindow);
+
 MetaFrameFlags meta_core_get_frame_flags (Display *xdisplay,
                                           Window   frame_xwindow);
 MetaFrameType  meta_core_get_frame_type   (Display *xdisplay,
diff --git a/src/display.c b/src/display.c
index b32ad425..01004123 100644
--- a/src/display.c
+++ b/src/display.c
@@ -45,6 +45,9 @@
 #ifdef HAVE_RANDR
 #include <X11/extensions/Xrandr.h>
 #endif
+#ifdef HAVE_SHAPE
+#include <X11/extensions/shape.h>
+#endif
 #include <string.h>
 
 #define USE_GDK_DISPLAY
@@ -489,6 +492,27 @@ meta_display_open (const char *name)
 #else  /* HAVE_XSYNC */
   meta_verbose ("Not compiled with Xsync support\n");
 #endif /* !HAVE_XSYNC */
+
+
+#ifdef HAVE_SHAPE
+  {
+    display->shape_error_base = 0;
+    display->shape_event_base = 0;
+    
+    if (!XShapeQueryExtension (display->xdisplay,
+                               &display->shape_event_base,
+                               &display->shape_error_base))
+      {
+        display->shape_error_base = 0;
+        display->shape_event_base = 0;
+      }
+    meta_verbose ("Attempted to init Shape, found error base %d event base %d\n",
+                  display->shape_error_base,
+                  display->shape_event_base);
+  }
+#else  /* HAVE_SHAPE */
+  meta_verbose ("Not compiled with Shape support\n");
+#endif /* !HAVE_SHAPE */
   
   screens = NULL;
   
@@ -1189,6 +1213,56 @@ event_callback (XEvent   *event,
         meta_window_handle_mouse_grab_op_event (display->grab_window, event);
     }
 #endif /* HAVE_XSYNC */
+
+#ifdef HAVE_SHAPE
+  if (META_DISPLAY_HAS_SHAPE (display) && 
+      event->type == (display->shape_event_base + ShapeNotify))
+    {
+      filter_out_event = TRUE; /* GTK doesn't want to see this really */
+      
+      if (window && !frame_was_receiver)
+        {
+          XShapeEvent *sev = (XShapeEvent*) event;
+
+          if (sev->kind == ShapeBounding)
+            {
+              if (sev->shaped && !window->has_shape)
+                {
+                  window->has_shape = TRUE;                  
+                  meta_topic (META_DEBUG_SHAPES,
+                              "Window %s now has a shape\n",
+                              window->desc);
+                }
+              else if (!sev->shaped && window->has_shape)
+                {
+                  window->has_shape = FALSE;
+                  meta_topic (META_DEBUG_SHAPES,
+                              "Window %s no longer has a shape\n",
+                              window->desc);
+                }
+              else
+                {
+                  meta_topic (META_DEBUG_SHAPES,
+                              "Window %s shape changed\n",
+                              window->desc);
+                }
+
+              if (window->frame)
+                {
+                  window->frame->need_reapply_frame_shape = TRUE;
+                  meta_window_queue_move_resize (window);
+                }
+            }
+        }
+      else
+        {
+          meta_topic (META_DEBUG_SHAPES,
+                      "ShapeNotify not on a client window (window %s frame_was_receiver = %d)\n",
+                      window ? window->desc : "(none)",
+                      frame_was_receiver);
+        }
+    }
+#endif /* HAVE_SHAPE */
   
   switch (event->type)
     {
@@ -1902,6 +1976,15 @@ event_get_modified_window (MetaDisplay *display,
       return None;
 
     default:
+#ifdef HAVE_SHAPE
+      if (META_DISPLAY_HAS_SHAPE (display) && 
+          event->type == (display->shape_event_base + ShapeNotify))
+        {
+          XShapeEvent *sev = (XShapeEvent*) event;
+          return sev->window;
+        }
+#endif
+
       return None;
     }
 }
@@ -2360,6 +2443,27 @@ meta_spew_event (MetaDisplay *display,
         }
       else
 #endif /* HAVE_XSYNC */
+#ifdef HAVE_SHAPE
+        if (META_DISPLAY_HAS_SHAPE (display) && 
+            event->type == (display->shape_event_base + ShapeNotify))
+          {
+            XShapeEvent *sev = (XShapeEvent*) event;
+
+            name = "ShapeNotify";
+
+            extra =
+              g_strdup_printf ("kind: %s "
+                               "x: %d y: %d w: %d h: %d "
+                               "shaped: %d",
+                               sev->kind == ShapeBounding ?
+                               "ShapeBounding" :
+                               (sev->kind == ShapeClip ?
+                               "ShapeClip" : "(unknown)"),
+                               sev->x, sev->y, sev->width, sev->height,
+                               sev->shaped);
+          }
+        else
+#endif /* HAVE_SHAPE */      
         {
           name = "(Unknown event)";
           extra = g_strdup_printf ("type: %d", event->xany.type);
@@ -3046,20 +3150,10 @@ meta_display_queue_retheme_all_windows (MetaDisplay *display)
       meta_window_queue_move_resize (window);
       if (window->frame)
         {
+          window->frame->need_reapply_frame_shape = TRUE;
+          
           meta_frame_queue_draw (window->frame);
-
-          /* FIXME this sucks and is slooooooooow. Do it in the idle with the
-           * redraw or the window resize. 
-           */
-
-#if 0
-          /* in case the theme doesn't affect the frame size */
-          meta_ui_apply_frame_shape (window->screen->ui,
-                                     window->frame->xwindow,
-                                     window->frame->rect.width,
-                                     window->frame->rect.height);
-#endif
-        }                                     
+        }
       
       tmp = tmp->next;
     }
diff --git a/src/display.h b/src/display.h
index 2641af4d..803f0213 100644
--- a/src/display.h
+++ b/src/display.h
@@ -296,6 +296,13 @@ struct _MetaDisplay
 #else
 #define META_DISPLAY_HAS_XSYNC(display) FALSE
 #endif
+#ifdef HAVE_SHAPE
+  int shape_event_base;
+  int shape_error_base;
+#define META_DISPLAY_HAS_SHAPE(display) ((display)->shape_event_base != 0)
+#else
+#define META_DISPLAY_HAS_SHAPE(display) FALSE
+#endif
 };
 
 gboolean      meta_display_open                (const char  *name);
diff --git a/src/frame.c b/src/frame.c
index b981559e..10ae0a5e 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -58,6 +58,7 @@ meta_window_ensure_frame (MetaWindow *window)
   frame->current_cursor = 0;
 
   frame->mapped = FALSE;
+  frame->need_reapply_frame_shape = TRUE;
   
   attrs.event_mask = EVENT_MASK;
 
@@ -144,7 +145,9 @@ meta_window_ensure_frame (MetaWindow *window)
   meta_ui_apply_frame_shape (frame->window->screen->ui,
                              frame->xwindow,
                              frame->rect.width,
-                             frame->rect.height);
+                             frame->rect.height,
+                             frame->window->has_shape);
+  frame->need_reapply_frame_shape = FALSE;
   
   meta_display_ungrab (window->display);
 }
@@ -277,6 +280,20 @@ meta_frame_calc_geometry (MetaFrame         *frame,
   *geomp = geom;
 }
 
+static void
+update_shape (MetaFrame *frame)
+{
+  if (frame->need_reapply_frame_shape)
+    {
+      meta_ui_apply_frame_shape (frame->window->screen->ui,
+                                 frame->xwindow,
+                                 frame->rect.width,
+                                 frame->rect.height,
+                                 frame->window->has_shape);
+      frame->need_reapply_frame_shape = FALSE;
+    }
+}
+
 void
 meta_frame_sync_to_window (MetaFrame *frame,
                            int        resize_gravity,
@@ -284,8 +301,11 @@ meta_frame_sync_to_window (MetaFrame *frame,
                            gboolean   need_resize)
 {
   if (!(need_move || need_resize))
-    return;
-  
+    {
+      update_shape (frame);
+      return;
+    }
+
   meta_topic (META_DEBUG_GEOMETRY,
               "Syncing frame geometry %d,%d %dx%d (SE: %d,%d)\n",
               frame->rect.x, frame->rect.y,
@@ -301,18 +321,17 @@ meta_frame_sync_to_window (MetaFrame *frame,
                                   frame->rect.width,
                                   frame->rect.height);
 
-      /* Done before the window resize, because doing it before means
-       * part of the window being resized becomes unshaped, which may
-       * be sort of hard to see with bg = None. If we did it after
-       * window resize, part of the window being resized would become
-       * shaped, which might be more visible.
-       */
-      
-      meta_ui_apply_frame_shape (frame->window->screen->ui,
-                                 frame->xwindow,
-                                 frame->rect.width,
-                                 frame->rect.height);
+      /* we need new shape if we're resized */
+      frame->need_reapply_frame_shape = TRUE;
     }
+
+  /* Done before the window resize, because doing it before means
+   * part of the window being resized becomes unshaped, which may
+   * be sort of hard to see with bg = None. If we did it after
+   * window resize, part of the window being resized would become
+   * shaped, which might be more visible.
+   */
+  update_shape (frame);
   
   if (need_move && need_resize)
     XMoveResizeWindow (frame->window->display->xdisplay,
diff --git a/src/frame.h b/src/frame.h
index 20f94699..afa19557 100644
--- a/src/frame.h
+++ b/src/frame.h
@@ -57,6 +57,7 @@ struct _MetaFrame
   int bottom_height;
 
   guint mapped : 1;
+  guint need_reapply_frame_shape : 1;
 };
 
 void     meta_window_ensure_frame           (MetaWindow *window);
diff --git a/src/frames.c b/src/frames.c
index e6492537..978e2bcc 100644
--- a/src/frames.c
+++ b/src/frames.c
@@ -495,6 +495,7 @@ meta_frames_manage_window (MetaFrames *frames,
   frame->text_height = -1;
   frame->title = NULL;
   frame->expose_delayed = FALSE;
+  frame->shape_applied = FALSE;
   frame->prelit_control = META_FRAME_CONTROL_NONE;
   
   meta_core_grab_buttons (gdk_display, frame->xwindow);
@@ -664,7 +665,8 @@ void
 meta_frames_apply_shapes (MetaFrames *frames,
                           Window      xwindow,
                           int         new_window_width,
-                          int         new_window_height)
+                          int         new_window_height,
+                          gboolean    window_has_shape)
 {
 #ifdef HAVE_SHAPE
   /* Apply shapes as if window had new_window_width, new_window_height */
@@ -685,10 +687,25 @@ meta_frames_apply_shapes (MetaFrames *frames,
   if (!(fgeom.top_left_corner_rounded ||
         fgeom.top_right_corner_rounded ||
         fgeom.bottom_left_corner_rounded ||
-        fgeom.bottom_right_corner_rounded))
+        fgeom.bottom_right_corner_rounded ||
+        window_has_shape))
     {
-      XShapeCombineMask (gdk_display, frame->xwindow,
-                         ShapeBounding, 0, 0, None, ShapeSet);
+      if (frame->shape_applied)
+        {
+          meta_topic (META_DEBUG_SHAPES,
+                      "Unsetting shape mask on frame 0x%lx\n",
+                      frame->xwindow);
+          
+          XShapeCombineMask (gdk_display, frame->xwindow,
+                             ShapeBounding, 0, 0, None, ShapeSet);
+          frame->shape_applied = FALSE;
+        }
+      else
+        {
+          meta_topic (META_DEBUG_SHAPES,
+                      "Frame 0x%lx still doesn't need a shape mask\n",
+                      frame->xwindow);
+        }
       
       return; /* nothing to do */
     }
@@ -804,11 +821,98 @@ meta_frames_apply_shapes (MetaFrames *frames,
 
   XSubtractRegion (window_xregion, corners_xregion, window_xregion);
 
-  XShapeCombineRegion (gdk_display, frame->xwindow,
-                       ShapeBounding, 0, 0, window_xregion, ShapeSet);
+  XDestroyRegion (corners_xregion);
+  
+  if (window_has_shape)
+    {
+      /* The client window is oclock or something and has a shape
+       * mask. To avoid a round trip to get its shape region, we
+       * create a fake window that's never mapped, build up our shape
+       * on that, then combine. Wasting the window is assumed cheaper
+       * than a round trip, but who really knows for sure.
+       */
+      XSetWindowAttributes attrs;      
+      Window shape_window;
+      Window client_window;
+      Region client_xregion;
+      GdkScreen *screen;
+      int screen_number;
+      
+      meta_topic (META_DEBUG_SHAPES,
+                  "Frame 0x%lx needs to incorporate client shape\n",
+                  frame->xwindow);
+      
+      screen = gtk_widget_get_screen (GTK_WIDGET (frames));
+      screen_number = gdk_x11_screen_get_screen_number (screen);
+      
+      attrs.override_redirect = True;
+      
+      shape_window = XCreateWindow (gdk_display,
+                                    RootWindow (gdk_display, screen_number),
+                                    -5000, -5000,
+                                    new_window_width,
+                                    new_window_height,
+                                    0,
+                                    CopyFromParent,
+                                    CopyFromParent,
+                                    CopyFromParent,
+                                    CWOverrideRedirect,
+                                    &attrs);
+
+      /* Copy the client's shape to the temporary shape_window */
+      client_window = meta_core_get_client_xwindow (gdk_display,
+                                                    frame->xwindow);
+
+      XShapeCombineShape (gdk_display, shape_window, ShapeBounding,
+                          fgeom.left_width,
+                          fgeom.top_height,
+                          client_window,
+                          ShapeBounding,
+                          ShapeSet);
+
+      /* Punch the client area out of the normal frame shape,
+       * then union it with the shape_window's existing shape
+       */
+      client_xregion = XCreateRegion ();
+  
+      xrect.x = fgeom.left_width;
+      xrect.y = fgeom.top_height;
+      xrect.width = new_window_width - fgeom.right_width - xrect.x;
+      xrect.height = new_window_height - fgeom.bottom_height - xrect.y;
+
+      XUnionRectWithRegion (&xrect, client_xregion, client_xregion);
+      
+      XSubtractRegion (window_xregion, client_xregion, window_xregion);
+
+      XDestroyRegion (client_xregion);
+      
+      XShapeCombineRegion (gdk_display, shape_window,
+                           ShapeBounding, 0, 0, window_xregion, ShapeUnion);
+      
+      /* Now copy shape_window shape to the real frame */
+      XShapeCombineShape (gdk_display, frame->xwindow, ShapeBounding,
+                          0, 0,
+                          shape_window,
+                          ShapeBounding,
+                          ShapeSet);
+
+      XDestroyWindow (gdk_display, shape_window);
+    }
+  else
+    {
+      /* No shape on the client, so just do simple stuff */
+
+      meta_topic (META_DEBUG_SHAPES,
+                  "Frame 0x%lx has shaped corners\n",
+                  frame->xwindow);
+      
+      XShapeCombineRegion (gdk_display, frame->xwindow,
+                           ShapeBounding, 0, 0, window_xregion, ShapeSet);
+    }
+  
+  frame->shape_applied = TRUE;
   
   XDestroyRegion (window_xregion);
-  XDestroyRegion (corners_xregion);
 #endif
 }
 
diff --git a/src/frames.h b/src/frames.h
index b0febb0a..182b6516 100644
--- a/src/frames.h
+++ b/src/frames.h
@@ -72,7 +72,8 @@ struct _MetaUIFrame
   int text_height;
   char *title; /* NULL once we have a layout */
   guint expose_delayed : 1;
-
+  guint shape_applied : 1;
+  
   /* FIXME get rid of this, it can just be in the MetaFrames struct */
   MetaFrameControl prelit_control;
 };
@@ -127,7 +128,8 @@ void meta_frames_unflicker_bg (MetaFrames *frames,
 void meta_frames_apply_shapes (MetaFrames *frames,
                                Window      xwindow,
                                int         new_window_width,
-                               int         new_window_height);
+                               int         new_window_height,
+                               gboolean    window_has_shape);
 
 void meta_frames_queue_draw (MetaFrames *frames,
                              Window      xwindow);
diff --git a/src/prefs.c b/src/prefs.c
index 2a88164e..aadb98e7 100644
--- a/src/prefs.c
+++ b/src/prefs.c
@@ -1028,7 +1028,12 @@ update_application_based (gboolean value)
 {
   gboolean old = application_based;
 
+  /* DISABLE application_based feature for now */
+#if 0
   application_based = value;
+#else
+  application_based = FALSE;
+#endif
 
   return old != application_based;
 }
diff --git a/src/ui.c b/src/ui.c
index 13542e99..e86c65b9 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -238,12 +238,15 @@ meta_ui_reset_frame_bg (MetaUI *ui,
 }
 
 void
-meta_ui_apply_frame_shape  (MetaUI *ui,
-                            Window  xwindow,
-                            int     new_window_width,
-                            int     new_window_height)
-{
-  meta_frames_apply_shapes (ui->frames, xwindow, new_window_width, new_window_height);
+meta_ui_apply_frame_shape  (MetaUI  *ui,
+                            Window   xwindow,
+                            int      new_window_width,
+                            int      new_window_height,
+                            gboolean window_has_shape)
+{
+  meta_frames_apply_shapes (ui->frames, xwindow,
+                            new_window_width, new_window_height,
+                            window_has_shape);
 }
 
 void
diff --git a/src/ui.h b/src/ui.h
index 488ce8e7..5415bedd 100644
--- a/src/ui.h
+++ b/src/ui.h
@@ -73,10 +73,11 @@ void meta_ui_unflicker_frame_bg (MetaUI *ui,
 void meta_ui_reset_frame_bg     (MetaUI *ui,
                                  Window  xwindow);
 
-void meta_ui_apply_frame_shape  (MetaUI *ui,
-                                 Window  xwindow,
-                                 int     new_window_width,
-                                 int     new_window_height);
+void meta_ui_apply_frame_shape  (MetaUI  *ui,
+                                 Window   xwindow,
+                                 int      new_window_width,
+                                 int      new_window_height,
+                                 gboolean window_has_shape);
 
 void meta_ui_queue_frame_draw (MetaUI *ui,
                                Window xwindow);
diff --git a/src/util.c b/src/util.c
index b54a66ce..6e43f5fe 100644
--- a/src/util.c
+++ b/src/util.c
@@ -282,6 +282,8 @@ topic_name (MetaDebugTopic topic)
       return "GROUPS";
     case META_DEBUG_RESIZING:
       return "RESIZING";
+    case META_DEBUG_SHAPES:
+      return "SHAPES";
     }
 
   return "Window manager";
diff --git a/src/util.h b/src/util.h
index abf29ea1..c53230bb 100644
--- a/src/util.h
+++ b/src/util.h
@@ -65,7 +65,8 @@ typedef enum
   META_DEBUG_STARTUP      = 1 << 15,
   META_DEBUG_PREFS        = 1 << 16,
   META_DEBUG_GROUPS       = 1 << 17,
-  META_DEBUG_RESIZING     = 1 << 18
+  META_DEBUG_RESIZING     = 1 << 18,
+  META_DEBUG_SHAPES       = 1 << 19
 
 } MetaDebugTopic;
 
diff --git a/src/window.c b/src/window.c
index f6fcaca8..dee56948 100644
--- a/src/window.c
+++ b/src/window.c
@@ -41,6 +41,10 @@
 #include <X11/Xatom.h>
 #include <string.h>
 
+#ifdef HAVE_SHAPE
+#include <X11/extensions/shape.h>
+#endif
+
 typedef enum
 {
   META_IS_CONFIGURE_REQUEST = 1 << 0,
@@ -159,9 +163,11 @@ meta_window_new (MetaDisplay *display,
   GSList *tmp;
   MetaWorkspace *space;
   gulong existing_wm_state;
+  gulong event_mask;
 #define N_INITIAL_PROPS 10
   Atom initial_props[N_INITIAL_PROPS];
   int i;
+  gboolean has_shape;
   
   g_assert (N_INITIAL_PROPS == (int) G_N_ELEMENTS (initial_props));
   
@@ -241,11 +247,36 @@ meta_window_new (MetaDisplay *display,
   
   XAddToSaveSet (display->xdisplay, xwindow);
 
-  XSelectInput (display->xdisplay, xwindow,
-                PropertyChangeMask |
-                EnterWindowMask | LeaveWindowMask |
-                FocusChangeMask |
-                ColormapChangeMask);
+  event_mask =
+    PropertyChangeMask | EnterWindowMask | LeaveWindowMask |
+    FocusChangeMask | ColormapChangeMask;
+
+  XSelectInput (display->xdisplay, xwindow, event_mask);
+
+  has_shape = FALSE;
+#ifdef HAVE_SHAPE
+  if (META_DISPLAY_HAS_SHAPE (display))
+    {
+      int x_bounding, y_bounding, x_clip, y_clip;
+      unsigned w_bounding, h_bounding, w_clip, h_clip;
+      int bounding_shaped, clip_shaped;
+
+      XShapeSelectInput (display->xdisplay, xwindow, ShapeNotifyMask);
+
+      XShapeQueryExtents (display->xdisplay, xwindow,
+                          &bounding_shaped, &x_bounding, &y_bounding,
+                          &w_bounding, &h_bounding,
+                          &clip_shaped, &x_clip, &y_clip,
+                          &w_clip, &h_clip);
+
+      has_shape = bounding_shaped != FALSE;
+
+      meta_topic (META_DEBUG_SHAPES,
+                  "Window has_shape = %d extents %d,%d %d x %d\n",
+                  has_shape, x_bounding, y_bounding,
+                  w_bounding, h_bounding);
+    }
+#endif
 
   /* Get rid of any borders */
   if (attrs.border_width != 0)
@@ -311,6 +342,8 @@ meta_window_new (MetaDisplay *display,
 
   /* avoid tons of stack updates */
   meta_stack_freeze (window->screen->stack);
+
+  window->has_shape = has_shape;
   
   /* Remember this rect is the actual window size */
   window->rect.x = attrs.x;
@@ -977,6 +1010,11 @@ meta_window_free (MetaWindow  *window)
   XSelectInput (window->display->xdisplay,
                 window->xwindow,
                 NoEventMask);
+
+#ifdef HAVE_SHAPE
+  if (META_DISPLAY_HAS_SHAPE (window->display))
+    XShapeSelectInput (window->display->xdisplay, window->xwindow, NoEventMask);
+#endif
   
   meta_error_trap_pop (window->display, FALSE);
 
diff --git a/src/window.h b/src/window.h
index c200c9c8..e8541f5c 100644
--- a/src/window.h
+++ b/src/window.h
@@ -219,6 +219,9 @@ struct _MetaWindow
   guint using_net_wm_name : 1; /* vs. plain wm_name */
   guint using_net_wm_icon_name : 1; /* vs. plain wm_icon_name */
 
+  /* has a shape mask */
+  guint has_shape : 1;
+  
 #ifdef HAVE_XSYNC
   /* XSync update counter */
   XSyncCounter update_counter;