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diff -up gnome-desktop-2.24.0/libgnome-desktop/gnome-bg.c.fade gnome-desktop-2.24.0/libgnome-desktop/gnome-bg.c
--- gnome-desktop-2.24.0/libgnome-desktop/gnome-bg.c.fade	2008-09-22 17:01:45.000000000 -0400
+++ gnome-desktop-2.24.0/libgnome-desktop/gnome-bg.c	2008-10-12 12:17:40.000000000 -0400
@@ -37,11 +37,15 @@ Author: Soren Sandmann <sandmann@redhat.
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
 
+#include <cairo.h>
+#include <cairo-xlib.h>
+
 #include <gconf/gconf-client.h>
 #include <libgnomeui/libgnomeui.h>
 
 #define GNOME_DESKTOP_USE_UNSTABLE_API
 #include <libgnomeui/gnome-bg.h>
+#include <libgnomeui/gnome-bg-crossfade.h>
 
 #define BG_KEY_DRAW_BACKGROUND    GNOME_BG_KEY_DIR "/draw_background"
 #define BG_KEY_PRIMARY_COLOR      GNOME_BG_KEY_DIR "/primary_color"
@@ -98,6 +102,7 @@ struct _GnomeBG
 	GFileMonitor *		file_monitor;
 
 	guint                   changed_id;
+	guint                   transitioned_id;
 	
 	/* Cached information, only access through cache accessor functions */
         SlideShow *		slideshow;
@@ -115,6 +120,7 @@ struct _GnomeBGClass
 
 enum {
 	CHANGED,
+	TRANSITIONED,
 	N_SIGNALS
 };
 
@@ -275,6 +281,30 @@ queue_changed (GnomeBG *bg)
 					     NULL);
 }
 
+static gboolean
+do_transitioned (GnomeBG *bg)
+{
+	bg->transitioned_id = 0;
+
+	g_signal_emit (G_OBJECT (bg), signals[TRANSITIONED], 0);
+
+	return FALSE;
+}
+
+static void
+queue_transitioned (GnomeBG *bg)
+{
+	if (bg->transitioned_id > 0) {
+		g_source_remove (bg->transitioned_id);
+	}
+
+	bg->transitioned_id = g_timeout_add_full (G_PRIORITY_LOW,
+					     100,
+					     (GSourceFunc)do_transitioned,
+					     bg,
+					     NULL);
+}
+
 void
 gnome_bg_load_from_preferences (GnomeBG     *bg,
 				GConfClient *client)
@@ -414,6 +444,14 @@ gnome_bg_class_init (GnomeBGClass *klass
 					 NULL, NULL,
 					 g_cclosure_marshal_VOID__VOID,
 					 G_TYPE_NONE, 0);
+
+	signals[TRANSITIONED] = g_signal_new ("transitioned",
+					 G_OBJECT_CLASS_TYPE (object_class),
+					 G_SIGNAL_RUN_LAST,
+					 0,
+					 NULL, NULL,
+					 g_cclosure_marshal_VOID__VOID,
+					 G_TYPE_NONE, 0);
 }
 
 GnomeBG *
@@ -1012,52 +1050,88 @@ gnome_bg_create_thumbnail (GnomeBG      
 }
 
 
-/* Set the root pixmap, and properties pointing to it. We
- * do this atomically with XGrabServer to make sure that
- * we won't leak the pixmap if somebody else it setting
- * it at the same time. (This assumes that they follow the
- * same conventions we do)
- */
-void 
-gnome_bg_set_pixmap_as_root (GdkScreen *screen, GdkPixmap *pixmap)
+static GdkPixmap * 
+gnome_bg_set_root_pixmap_id (GdkScreen *screen,
+			     GdkPixmap *pixmap,
+			     gboolean   copy_old_root)
 {
 	int      result;
 	gint     format;
 	gulong   nitems;
 	gulong   bytes_after;
-	guchar  *data_esetroot;
+	guchar  *data;
 	Pixmap   pixmap_id;
 	Atom     type;
 	Display *display;
 	int      screen_num;
-	
-	g_return_if_fail (screen != NULL);
-	g_return_if_fail (pixmap != NULL);
+	GdkPixmap *old_root_pixmap;
 	
 	screen_num = gdk_screen_get_number (screen);
-	
-	data_esetroot = NULL;
+	old_root_pixmap = NULL;
+	data = NULL;
 	display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen));
 	
 	XGrabServer (display);
+
+	if (copy_old_root) {
+		result = XGetWindowProperty (display,
+					    RootWindow (display, screen_num),
+					    gdk_x11_get_xatom_by_name ("_XROOTPMAP_ID"),
+					    0L, 1L, False, XA_PIXMAP,
+					    &type, &format, &nitems, &bytes_after,
+					    &data);
+
+		if (data != NULL) {
+			if (result == Success && type == XA_PIXMAP &&
+			    format == 32 && nitems == 1) {
+				GdkPixmap *source_pixmap;
+				int width, height;
+				cairo_t *cr;
+				cairo_pattern_t *pattern;
+
+				source_pixmap = gdk_pixmap_foreign_new (*(Pixmap *) data);
+				gdk_drawable_set_colormap (source_pixmap, gdk_screen_get_default_colormap (screen));
+
+				width = gdk_screen_get_width (screen);
+				height = gdk_screen_get_width (screen);
+
+				old_root_pixmap = gdk_pixmap_new (source_pixmap, width, height, -1);
+
+				cr = gdk_cairo_create (old_root_pixmap);
+				gdk_cairo_set_source_pixmap (cr, source_pixmap, 0, 0);
+				pattern = cairo_get_source (cr);
+				cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
+				cairo_paint (cr);
+
+				if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) {
+					g_object_unref (old_root_pixmap);
+					old_root_pixmap = NULL;
+				}
+				cairo_destroy (cr);
+
+				g_object_unref (source_pixmap);
+			}
+			XFree (data);
+	    }
+	}
 	
 	result = XGetWindowProperty (
 		display, RootWindow (display, screen_num),
 		gdk_x11_get_xatom_by_name ("ESETROOT_PMAP_ID"),
 		0L, 1L, False, XA_PIXMAP,
 		&type, &format, &nitems, &bytes_after,
-		&data_esetroot);
+		&data);
 	
-	if (data_esetroot != NULL) {
+	if (data!= NULL) {
 		if (result == Success && type == XA_PIXMAP &&
 		    format == 32 &&
 		    nitems == 1) {
 			gdk_error_trap_push ();
-			XKillClient (display, *(Pixmap *)data_esetroot);
+			XKillClient (display, *(Pixmap *)data);
 			gdk_flush ();
 			gdk_error_trap_pop ();
 		}
-		XFree (data_esetroot);
+		XFree (data);
 	}
 	
 	pixmap_id = GDK_WINDOW_XWINDOW (pixmap);
@@ -1071,13 +1145,68 @@ gnome_bg_set_pixmap_as_root (GdkScreen *
 			 32, PropModeReplace,
 			 (guchar *) &pixmap_id, 1);
 	
-	XSetWindowBackgroundPixmap (display, RootWindow (display, screen_num),
-				    pixmap_id);
-	XClearWindow (display, RootWindow (display, screen_num));
-	
 	XUngrabServer (display);
 	
 	XFlush (display);
+	return old_root_pixmap;
+}
+
+/* Set the root pixmap, and properties pointing to it. We
+ * do this atomically with XGrabServer to make sure that
+ * we won't leak the pixmap if somebody else it setting
+ * it at the same time. (This assumes that they follow the
+ * same conventions we do)
+ */
+void 
+gnome_bg_set_pixmap_as_root (GdkScreen *screen, GdkPixmap *pixmap)
+{
+	Display *display;
+	int      screen_num;
+	
+	g_return_if_fail (screen != NULL);
+	g_return_if_fail (pixmap != NULL);
+	
+	screen_num = gdk_screen_get_number (screen);
+	display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen));
+
+	gnome_bg_set_root_pixmap_id (screen, pixmap, FALSE);
+
+	XSetWindowBackgroundPixmap (display, RootWindow (display, screen_num),
+				    GDK_PIXMAP_XID (pixmap));
+	XClearWindow (display, RootWindow (display, screen_num));
+	
+}
+
+GnomeBGCrossfade * 
+gnome_bg_set_pixmap_as_root_with_crossfade (GdkScreen    *screen,
+                                       GdkPixmap    *pixmap,
+                                       GMainContext *context)
+{
+	Display *display;
+	GdkWindow *root_window;
+	GdkPixmap *old_pixmap;
+	int      screen_num;
+	int      width, height;
+	GnomeBGCrossfade *fade;
+
+	g_return_val_if_fail (screen != NULL, 0);
+	g_return_val_if_fail (pixmap != NULL, 0);
+
+	root_window = gdk_screen_get_root_window (screen);
+
+	width = gdk_screen_get_width (screen);
+	height = gdk_screen_get_height (screen);
+
+	fade = gnome_bg_crossfade_new (width, height);
+
+	old_pixmap = gnome_bg_set_root_pixmap_id (screen, pixmap, TRUE);
+
+	gnome_bg_crossfade_set_start_pixmap (fade, old_pixmap);
+	gnome_bg_crossfade_set_end_pixmap (fade, pixmap);
+
+	gnome_bg_crossfade_start (fade, root_window, context);
+
+	return fade;
 }
 
 
@@ -1343,7 +1472,7 @@ on_timeout (gpointer data)
 
 	bg->timeout_id = 0;
 	
-	queue_changed (bg);
+	queue_transitioned (bg);
 
 	return FALSE;
 }
diff -up /dev/null gnome-desktop-2.24.0/libgnome-desktop/gnome-bg-crossfade.c
--- /dev/null	2008-10-12 06:46:34.272291660 -0400
+++ gnome-desktop-2.24.0/libgnome-desktop/gnome-bg-crossfade.c	2008-10-10 19:17:21.000000000 -0400
@@ -0,0 +1,432 @@
+/* gnome-bg-crossfade.h - fade window background between two pixmaps
+ *
+ * Copyright (C) 2008 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License
+ * as published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Ray Strode <rstrode@redhat.com>
+*/
+
+#include <string.h>
+#include <math.h>
+#include <stdarg.h>
+
+#include <gio/gio.h>
+
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+
+#include <cairo.h>
+#include <cairo-xlib.h>
+
+#include <libgnomeui/libgnomeui.h>
+
+#define GNOME_DESKTOP_USE_UNSTABLE_API
+#include <libgnomeui/gnome-bg.h>
+#include "libgnomeui/gnome-bg-crossfade.h"
+
+struct _GnomeBGCrossfadePrivate
+{
+	GObject		 parent_instance;
+	GdkWindow	*window;
+	int              width;
+	int              height;
+	GdkPixmap	*fading_pixmap;
+	GdkPixmap	*end_pixmap;
+	gdouble		 start_time;
+	guint		 timeout_id;
+};
+
+enum {
+	PROP_0,
+	PROP_WIDTH,
+	PROP_HEIGHT,
+};
+
+enum {
+	FINISHED,
+	NUMBER_OF_SIGNALS
+};
+
+static guint signals[NUMBER_OF_SIGNALS] = { 0 };
+
+G_DEFINE_TYPE (GnomeBGCrossfade, gnome_bg_crossfade, G_TYPE_OBJECT)
+#define GNOME_BG_CROSSFADE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o),\
+			                   GNOME_TYPE_BG_CROSSFADE,\
+			                   GnomeBGCrossfadePrivate))
+
+static void
+gnome_bg_crossfade_set_property (GObject      *object,
+				 guint         property_id,
+				 const GValue *value,
+				 GParamSpec   *pspec)
+{
+	GnomeBGCrossfade *fade;
+
+	g_assert (GNOME_IS_BG_CROSSFADE (object));
+
+	fade = GNOME_BG_CROSSFADE (object);
+
+	switch (property_id)
+	{
+	case PROP_WIDTH:
+		fade->priv->width = g_value_get_int (value);
+		break;
+	case PROP_HEIGHT:
+		fade->priv->height = g_value_get_int (value);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+		break;
+	}
+}
+
+static void
+gnome_bg_crossfade_get_property (GObject    *object,
+			     guint       property_id,
+			     GValue     *value,
+			     GParamSpec *pspec)
+{
+	GnomeBGCrossfade *fade;
+
+	g_assert (GNOME_IS_BG_CROSSFADE (object));
+
+	fade = GNOME_BG_CROSSFADE (object);
+
+	switch (property_id)
+	{
+	case PROP_WIDTH:
+		g_value_set_int (value, fade->priv->width);
+		break;
+	case PROP_HEIGHT:
+		g_value_set_int (value, fade->priv->height);
+		break;
+
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+		break;
+	}
+}
+
+static void
+gnome_bg_crossfade_finalize (GObject *object)
+{
+	GnomeBGCrossfade *fade;
+
+	fade = GNOME_BG_CROSSFADE (object);
+
+	if (fade->priv->fading_pixmap != NULL) {
+		g_object_unref (fade->priv->fading_pixmap);
+		fade->priv->fading_pixmap = NULL;
+	}
+
+	if (fade->priv->end_pixmap != NULL) {
+		g_object_unref (fade->priv->end_pixmap);
+		fade->priv->end_pixmap = NULL;
+	}
+
+	if (fade->priv->timeout_id != 0) {
+		g_source_remove (fade->priv->timeout_id);
+		fade->priv->timeout_id = 0;
+	}
+
+}
+
+static void
+gnome_bg_crossfade_class_init (GnomeBGCrossfadeClass *fade_class)
+{
+	GObjectClass *gobject_class;
+
+	gobject_class = G_OBJECT_CLASS (fade_class);
+
+	gobject_class->get_property = gnome_bg_crossfade_get_property;
+	gobject_class->set_property = gnome_bg_crossfade_set_property;
+	gobject_class->finalize = gnome_bg_crossfade_finalize;
+
+	g_object_class_install_property (gobject_class,
+					 PROP_WIDTH,
+					 g_param_spec_int ("width",
+						           "Window Width",
+							    "Width of window to fade",
+							    0, G_MAXINT, 0,
+							    G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE));
+
+	g_object_class_install_property (gobject_class,
+					 PROP_HEIGHT,
+					 g_param_spec_int ("height", "Window Height",
+						           "Height of window to fade on",
+							   0, G_MAXINT, 0,
+							   G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE));
+	signals[FINISHED] = g_signal_new ("finished",
+					  G_OBJECT_CLASS_TYPE (gobject_class),
+					  G_SIGNAL_RUN_LAST, 0, NULL, NULL,
+					  g_cclosure_marshal_VOID__VOID,
+					  G_TYPE_NONE, 0);
+
+	g_type_class_add_private (gobject_class, sizeof (GnomeBGCrossfadePrivate));
+}
+
+static void
+gnome_bg_crossfade_init (GnomeBGCrossfade *fade)
+{
+	fade->priv = GNOME_BG_CROSSFADE_GET_PRIVATE (fade);
+}
+
+GnomeBGCrossfade *
+gnome_bg_crossfade_new (int width,
+			int height)
+{
+	GObject *object;
+
+	object = g_object_new (GNOME_TYPE_BG_CROSSFADE,
+			       "width", width,
+			       "height", height, NULL);
+
+	return (GnomeBGCrossfade *) object;
+}
+
+static GdkPixmap *
+copy_pixmap (GdkPixmap *pixmap,
+	     int        width,
+	     int        height)
+{
+	GdkPixmap *copy;
+	cairo_t *cr;
+
+	copy = gdk_pixmap_new (pixmap, width, height, pixmap == NULL? 24 : -1);
+
+	cr = gdk_cairo_create (copy);
+
+	if (pixmap != NULL) {
+		cairo_pattern_t *pattern;
+		gdk_cairo_set_source_pixmap (cr, pixmap, 0.0, 0.0);
+		pattern = cairo_get_source (cr);
+		cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
+	} else {
+		GtkStyle *style;
+		style = gtk_widget_get_default_style ();
+		gdk_cairo_set_source_color (cr, &style->bg[GTK_STATE_NORMAL]);
+	}
+
+	cairo_paint (cr);
+
+	if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) {
+		g_object_unref (copy);
+		copy = NULL;
+	}
+	cairo_destroy (cr);
+
+	return copy;
+}
+
+gboolean
+gnome_bg_crossfade_set_start_pixmap (GnomeBGCrossfade *fade,
+				     GdkPixmap        *pixmap)
+{
+	g_return_val_if_fail (GNOME_IS_BG_CROSSFADE (fade), FALSE);
+
+	if (fade->priv->fading_pixmap != NULL) {
+		g_object_unref (fade->priv->fading_pixmap);
+		fade->priv->fading_pixmap = NULL;
+	}
+
+	fade->priv->fading_pixmap = copy_pixmap (pixmap,
+						 fade->priv->width,
+						 fade->priv->height);
+
+	return fade->priv->fading_pixmap != NULL;
+}
+
+gboolean
+gnome_bg_crossfade_set_end_pixmap (GnomeBGCrossfade *fade,
+				   GdkPixmap        *pixmap)
+{
+	g_return_val_if_fail (GNOME_IS_BG_CROSSFADE (fade), FALSE);
+
+	if (fade->priv->end_pixmap != NULL) {
+		g_object_unref (fade->priv->end_pixmap);
+		fade->priv->end_pixmap = NULL;
+	}
+
+	fade->priv->end_pixmap = copy_pixmap (pixmap,
+					      fade->priv->width,
+					      fade->priv->height);
+
+	return fade->priv->end_pixmap != NULL;
+}
+
+static gdouble
+get_current_time (void)
+{
+	const double microseconds_per_second = 1000000.0;
+	double       timestamp;
+	GTimeVal     now;
+
+	g_get_current_time (&now);
+
+	timestamp = ((microseconds_per_second * now.tv_sec) + now.tv_usec) /
+	            microseconds_per_second;
+
+	return timestamp;
+}
+
+static gboolean
+animations_are_disabled (GnomeBGCrossfade *fade)
+{
+	GtkSettings *settings;
+	GdkScreen *screen;
+	gboolean are_enabled;
+
+	if (fade->priv->window == NULL) {
+		return FALSE;
+	}
+
+	screen = gdk_drawable_get_screen (fade->priv->window);
+
+	settings = gtk_settings_get_for_screen (screen);
+
+	g_object_get (settings, "gtk-enable-animations", &are_enabled, NULL);
+
+	return !are_enabled;
+}
+
+static gboolean
+on_tick (GnomeBGCrossfade *fade)
+{
+	gdouble now, percent_done;
+	cairo_t *cr;
+	cairo_status_t status;
+
+	g_return_val_if_fail (GNOME_IS_BG_CROSSFADE (fade), FALSE);
+
+	now = get_current_time ();
+
+	percent_done = (now - fade->priv->start_time) / .75;
+
+	percent_done = CLAMP (percent_done, 0.0, 1.0);
+
+	if (fade->priv->fading_pixmap == NULL) {
+		return FALSE;
+	}
+
+	if (animations_are_disabled (fade)) {
+		return FALSE;
+	}
+
+	/* We accumulate the results in place for performance reasons.
+	 *
+	 * This means 1) The fade is exponential, not linear (looks good!)
+	 * 2) The rate of fade is not independent of frame rate. Slower machines
+	 * will get a slower fade (but never longer than .75 seconds), and
+	 * even the fastest machines will get *some* fade because the framerate
+	 * is capped.
+	 */
+	cr = gdk_cairo_create (fade->priv->fading_pixmap);
+
+	gdk_cairo_set_source_pixmap (cr, fade->priv->end_pixmap,
+				     0.0, 0.0);
+	cairo_paint_with_alpha (cr, percent_done);
+	status = cairo_status (cr);
+	cairo_destroy (cr);
+
+	if (status == CAIRO_STATUS_SUCCESS) {
+		if (GDK_WINDOW_TYPE (fade->priv->window) == GDK_WINDOW_FOREIGN ||
+		    GDK_WINDOW_TYPE (fade->priv->window) == GDK_WINDOW_ROOT) {
+			GdkDisplay *display;
+			display = gdk_drawable_get_display (fade->priv->window);
+			gdk_window_clear (fade->priv->window);
+			gdk_display_flush (display);
+		} else {
+        		gdk_window_invalidate_rect (fade->priv->window, NULL, FALSE);
+		}
+        }
+	return percent_done <= .99;
+}
+
+static void
+on_finished (GnomeBGCrossfade *fade)
+{
+	if (fade->priv->end_pixmap != NULL) {
+		gdk_window_set_back_pixmap (fade->priv->window,
+					    fade->priv->end_pixmap,
+					    FALSE);
+		GdkDisplay *display;
+		display = gdk_drawable_get_display (fade->priv->window);
+		gdk_window_clear (fade->priv->window);
+		gdk_display_sync (display);
+	}
+
+	if (fade->priv->fading_pixmap != NULL) {
+		g_object_unref (fade->priv->fading_pixmap);
+		fade->priv->fading_pixmap = NULL;
+	}
+
+	if (fade->priv->end_pixmap != NULL) {
+		g_object_unref (fade->priv->end_pixmap);
+		fade->priv->end_pixmap = NULL;
+	}
+
+	fade->priv->timeout_id = 0;
+	g_signal_emit (fade, signals[FINISHED], 0);
+}
+
+void
+gnome_bg_crossfade_start (GnomeBGCrossfade *fade,
+			  GdkWindow        *window,
+			  GMainContext     *context)
+{
+	GSource *source;
+
+	g_return_if_fail (GNOME_IS_BG_CROSSFADE (fade));
+	g_return_if_fail (fade->priv->fading_pixmap != NULL);
+	g_return_if_fail (fade->priv->end_pixmap != NULL);
+	g_return_if_fail (!gnome_bg_crossfade_is_started (fade));
+
+	fade->priv->start_time = get_current_time ();
+
+	source = g_timeout_source_new (1000 / 60.0);
+	g_source_set_callback (source,
+			       (GSourceFunc) on_tick,
+			       fade,
+			       (GDestroyNotify) on_finished);
+	fade->priv->timeout_id = g_source_attach (source, context);
+	g_source_unref (source);
+
+	fade->priv->window = window;
+	gdk_window_set_back_pixmap (fade->priv->window,
+				    fade->priv->fading_pixmap,
+				    FALSE);
+}
+
+gboolean
+gnome_bg_crossfade_is_started (GnomeBGCrossfade *fade)
+{
+	g_return_val_if_fail (GNOME_IS_BG_CROSSFADE (fade), FALSE);
+
+	return fade->priv->timeout_id != 0;
+}
+
+void
+gnome_bg_crossfade_stop (GnomeBGCrossfade *fade)
+{
+	g_return_if_fail (GNOME_IS_BG_CROSSFADE (fade));
+
+	if (fade->priv->timeout_id != 0) {
+		g_source_remove (fade->priv->timeout_id);
+	}
+}
diff -up /dev/null gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/gnome-bg-crossfade.h
--- /dev/null	2008-10-12 06:46:34.272291660 -0400
+++ gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/gnome-bg-crossfade.h	2008-10-10 18:21:11.000000000 -0400
@@ -0,0 +1,79 @@
+/* gnome-bg-crossfade.h - fade window background between two pixmaps
+
+   Copyright 2008, Red Hat, Inc.
+
+   This file is part of the Gnome Library.
+
+   The Gnome Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+   
+   The Gnome Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with the Gnome Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+
+   Author: Ray Strode <rstrode@redhat.com>
+*/
+
+#ifndef __GNOME_BG_CROSSFADE_H__
+#define __GNOME_BG_CROSSFADE_H__
+
+#ifndef GNOME_DESKTOP_USE_UNSTABLE_API
+#error    GnomeBGCrossfade is unstable API. You must define GNOME_DESKTOP_USE_UNSTABLE_API before including gnome-bg-crossfade.h
+#endif
+
+#include <libgnomeui/libgnomeui.h>
+#include <gdk/gdk.h>
+
+G_BEGIN_DECLS
+
+#define GNOME_TYPE_BG_CROSSFADE            (gnome_bg_crossfade_get_type ())
+#define GNOME_BG_CROSSFADE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GNOME_TYPE_BG_CROSSFADE, GnomeBGCrossfade))
+#define GNOME_BG_CROSSFADE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GNOME_TYPE_BG_CROSSFADE, GnomeBGCrossfadeClass))
+#define GNOME_IS_BG_CROSSFADE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GNOME_TYPE_BG_CROSSFADE))
+#define GNOME_IS_BG_CROSSFADE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GNOME_TYPE_BG_CROSSFADE))
+#define GNOME_BG_CROSSFADE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GNOME_TYPE_BG_CROSSFADE, GnomeBGCrossfadeClass))
+
+typedef struct _GnomeBGCrossfadePrivate GnomeBGCrossfadePrivate;
+typedef struct _GnomeBGCrossfade GnomeBGCrossfade;
+typedef struct _GnomeBGCrossfadeClass GnomeBGCrossfadeClass;
+
+struct _GnomeBGCrossfade
+{
+	GObject parent_object;
+
+	GnomeBGCrossfadePrivate *priv;
+};
+
+struct _GnomeBGCrossfadeClass
+{
+	GObjectClass parent_class;
+
+	void (* finished) (GnomeBGCrossfade *fade);
+};
+
+GType             gnome_bg_crossfade_get_type              (void);
+GnomeBGCrossfade *gnome_bg_crossfade_new (int width, int height);
+gboolean          gnome_bg_crossfade_set_start_pixmap (GnomeBGCrossfade               *fade,
+                                                      GdkPixmap *pixmap);
+
+gboolean          gnome_bg_crossfade_set_end_pixmap (GnomeBGCrossfade               *fade,
+                                                    GdkPixmap *pixmap);
+void              gnome_bg_crossfade_set_context (GnomeBGCrossfade *fade,
+                                                  GMainContext *context);
+void              gnome_bg_crossfade_start (GnomeBGCrossfade *fade,
+                                            GdkWindow        *window,
+                                            GMainContext     *context);
+gboolean          gnome_bg_crossfade_is_started (GnomeBGCrossfade *fade);
+void              gnome_bg_crossfade_stop (GnomeBGCrossfade *fade);
+
+G_END_DECLS
+
+#endif
diff -up gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/gnome-bg.h.fade gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/gnome-bg.h
--- gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/gnome-bg.h.fade	2008-09-22 17:01:45.000000000 -0400
+++ gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/gnome-bg.h	2008-10-10 18:21:11.000000000 -0400
@@ -33,6 +33,8 @@
 #include <gdk/gdk.h>
 #include <gconf/gconf-client.h>
 
+#include <libgnomeui/gnome-bg-crossfade.h>
+
 G_BEGIN_DECLS
 
 #define GNOME_TYPE_BG            (gnome_bg_get_type ())
@@ -109,6 +111,9 @@ gboolean         gnome_bg_changes_with_s
 void             gnome_bg_set_pixmap_as_root    (GdkScreen             *screen,
 						 GdkPixmap             *pixmap);
 
+GnomeBGCrossfade *gnome_bg_set_pixmap_as_root_with_crossfade (GdkScreen *screen,
+                                                              GdkPixmap *pixmap,
+                                                              GMainContext *context);
 
 G_END_DECLS
 
diff -up gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/Makefile.am.fade gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/Makefile.am
--- gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/Makefile.am.fade	2008-09-22 17:01:45.000000000 -0400
+++ gnome-desktop-2.24.0/libgnome-desktop/libgnomeui/Makefile.am	2008-10-10 18:21:11.000000000 -0400
@@ -3,6 +3,7 @@ libgnomeui_desktop_HEADERS =	\
 	gnome-ditem-edit.h	\
 	gnome-hint.h		\
 	gnome-bg.h		\
+	gnome-bg-crossfade.h		\
 	gnome-rr.h		\
 	gnome-rr-config.h	\
 	gnome-rr-labeler.h
diff -up gnome-desktop-2.24.0/libgnome-desktop/Makefile.am.fade gnome-desktop-2.24.0/libgnome-desktop/Makefile.am
--- gnome-desktop-2.24.0/libgnome-desktop/Makefile.am.fade	2008-09-22 17:01:45.000000000 -0400
+++ gnome-desktop-2.24.0/libgnome-desktop/Makefile.am	2008-10-10 18:21:11.000000000 -0400
@@ -21,6 +21,7 @@ libgnome_desktop_2_la_SOURCES = \
 	gnome-ditem-edit.c	\
 	gnome-hint.c		\
 	gnome-bg.c		\
+	gnome-bg-crossfade.c	\
 	display-name.c		\
 	gnome-rr.c		\
 	gnome-rr-config.c	\