[mate-bg] Proper update for GTK3 changes, simplify GTK2 compatability

Reverts: bc53751054ab "some ugly gtk3 porting", then:
1. use upstream commit below as a reference (GTK3)
2. simplify our GTK_VERSION_CHECK's, hopefully to make the code more readable,
and the GTK2 backwards-compatibility snippets easier to cleanup later.
--
Includes a renaming of all "pixmap" names in APIs to "surface":
http://git.gnome.org/browse/gnome-desktop/commit/?id=28f2b06f50e3f1adf19389c2c3a1f63872539fa9
https://bugzilla.gnome.org/show_bug.cgi?id=630724
Remove unnecessary, deprecated, GDK_DRAWABLE cast:
http://git.gnome.org/browse/gnome-desktop/commit/?id=260f6d2431088c5cd0ad1eb8d57f0ec994240f08

4 files changed, 364 insertions, 288 deletions

diff --git a/libmate-desktop/libmateui/mate-bg-crossfade.h b/libmate-desktop/libmateui/mate-bg-crossfade.h
index 268f1c7..28c1e28 100644
--- a/libmate-desktop/libmateui/mate-bg-crossfade.h
+++ b/libmate-desktop/libmateui/mate-bg-crossfade.h
@@ -66,11 +66,15 @@ MateBGCrossfade *mate_bg_crossfade_new (int width, int height);
 
 
 #if GTK_CHECK_VERSION(3, 0, 0)
-	gboolean mate_bg_crossfade_set_start_pixmap(MateBGCrossfade* fade, cairo_surface_t* pixmap);
-	gboolean mate_bg_crossfade_set_end_pixmap(MateBGCrossfade* fade, cairo_surface_t* pixmap);
+gboolean          mate_bg_crossfade_set_start_surface (MateBGCrossfade *fade,
+						       cairo_surface_t *surface);
+gboolean          mate_bg_crossfade_set_end_surface (MateBGCrossfade *fade,
+						     cairo_surface_t *surface);
 #else
-	gboolean mate_bg_crossfade_set_start_pixmap(MateBGCrossfade* fade, GdkPixmap* pixmap);
-	gboolean mate_bg_crossfade_set_end_pixmap(MateBGCrossfade* fade, GdkPixmap* pixmap);
+gboolean          mate_bg_crossfade_set_start_pixmap (MateBGCrossfade *fade,
+						      GdkPixmap *pixmap);
+gboolean          mate_bg_crossfade_set_end_pixmap (MateBGCrossfade *fade,
+						    GdkPixmap *pixmap);
 #endif
 
 void              mate_bg_crossfade_start (MateBGCrossfade *fade,
diff --git a/libmate-desktop/libmateui/mate-bg.h b/libmate-desktop/libmateui/mate-bg.h
index 45b3615..61e2a01 100644
--- a/libmate-desktop/libmateui/mate-bg.h
+++ b/libmate-desktop/libmateui/mate-bg.h
@@ -96,10 +96,14 @@ void             mate_bg_draw                  (MateBG               *bg,
                                                  gboolean               is_root);
 
 #if GTK_CHECK_VERSION(3, 0, 0)
-	cairo_surface_t* mate_bg_create_pixmap(MateBG* bg, GdkWindow* window, int width, int height, gboolean root);
+cairo_surface_t *mate_bg_create_surface        (MateBG               *bg,
 #else
-	GdkPixmap* mate_bg_create_pixmap(MateBG* bg, GdkWindow* window, int width, int height, gboolean root);
+GdkPixmap       *mate_bg_create_pixmap         (MateBG               *bg,
 #endif
+						GdkWindow            *window,
+						int                   width,
+						int                   height,
+						gboolean              root);
 
 gboolean         mate_bg_get_image_size        (MateBG               *bg,
 						 MateDesktopThumbnailFactory *factory,
@@ -124,20 +128,25 @@ GdkPixbuf *      mate_bg_create_frame_thumbnail (MateBG              *bg,
 						 int                    dest_height,
 						 int                    frame_num);
 
-/* Set a pixmap as root - not a MateBG method. At some point
+/* Set a surface as root - not a MateBG method. At some point
  * if we decide to stabilize the API then we may want to make
- * these object methods, drop mate_bg_create_pixmap, etc.
+ * these object methods, drop mate_bg_create_surface, etc.
  */
-
 #if GTK_CHECK_VERSION(3, 0, 0)
-	void mate_bg_set_pixmap_as_root(GdkScreen* screen, cairo_surface_t* pixmap);
-	MateBGCrossfade* mate_bg_set_pixmap_as_root_with_crossfade(GdkScreen* screen, cairo_surface_t* pixmap);
-	cairo_surface_t* mate_bg_get_pixmap_from_root(GdkScreen* screen);
-#else
-	void mate_bg_set_pixmap_as_root(GdkScreen* screen, GdkPixmap* pixmap);
-	MateBGCrossfade* mate_bg_set_pixmap_as_root_with_crossfade(GdkScreen* screen, GdkPixmap* pixmap);
-	GdkPixmap* mate_bg_get_pixmap_from_root(GdkScreen* screen);
-#endif
+void             mate_bg_set_surface_as_root   (GdkScreen            *screen,
+						cairo_surface_t    *surface);
+MateBGCrossfade *mate_bg_set_surface_as_root_with_crossfade (GdkScreen       *screen,
+							     cairo_surface_t *surface);
+cairo_surface_t *mate_bg_get_surface_from_root (GdkScreen *screen);
+
+#else /* GTK_CHECK_VERSION(3, 0, 0) */
+
+void             mate_bg_set_pixmap_as_root    (GdkScreen          *screen,
+						GdkPixmap          *pixmap);
+MateBGCrossfade *mate_bg_set_pixmap_as_root_with_crossfade  (GdkScreen       *screen,
+							     GdkPixmap       *pixmap);
+GdkPixmap *mate_bg_get_pixmap_from_root (GdkScreen *screen);
+#endif /* GTK_CHECK_VERSION(3, 0, 0) */
 
 #ifdef __cplusplus
 }
diff --git a/libmate-desktop/mate-bg-crossfade.c b/libmate-desktop/mate-bg-crossfade.c
index 48afc37..c3667cd 100644
--- a/libmate-desktop/mate-bg-crossfade.c
+++ b/libmate-desktop/mate-bg-crossfade.c
@@ -1,4 +1,4 @@
-/* mate-bg-crossfade.h - fade window background between two pixmaps
+/* mate-bg-crossfade.h - fade window background between two surfaces
  *
  * Copyright (C) 2008 Red Hat, Inc.
  *
@@ -38,24 +38,24 @@
 #include <libmateui/mate-bg.h>
 #include "libmateui/mate-bg-crossfade.h"
 
+#if !GTK_CHECK_VERSION(3, 0, 0)
+#define cairo_surface_t GdkPixmap
+#define cairo_create gdk_cairo_create
+#define cairo_set_source_surface gdk_cairo_set_source_pixmap
+#define cairo_surface_destroy g_object_unref
+#endif
+
 struct _MateBGCrossfadePrivate
 {
-	GdkWindow *window;
-	int        width;
-	int        height;
-
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_surface_t* fading_pixmap;
-		cairo_surface_t* end_pixmap;
-	#else
-		GdkPixmap* fading_pixmap;
-		GdkPixmap* end_pixmap;
-	#endif
-
-	gdouble    start_time;
-	gdouble    total_duration;
-	guint      timeout_id;
-	guint      is_first_frame : 1;
+	GdkWindow       *window;
+	int              width;
+	int              height;
+	cairo_surface_t *fading_surface;
+	cairo_surface_t *end_surface;
+	gdouble          start_time;
+	gdouble          total_duration;
+	guint            timeout_id;
+	guint            is_first_frame : 1;
 };
 
 enum {
@@ -138,14 +138,14 @@ mate_bg_crossfade_finalize (GObject *object)
 
 	mate_bg_crossfade_stop (fade);
 
-	if (fade->priv->fading_pixmap != NULL) {
-		g_object_unref (fade->priv->fading_pixmap);
-		fade->priv->fading_pixmap = NULL;
+	if (fade->priv->fading_surface != NULL) {
+		cairo_surface_destroy (fade->priv->fading_surface);
+		fade->priv->fading_surface = NULL;
 	}
 
-	if (fade->priv->end_pixmap != NULL) {
-		g_object_unref (fade->priv->end_pixmap);
-		fade->priv->end_pixmap = NULL;
+	if (fade->priv->end_surface != NULL) {
+		cairo_surface_destroy (fade->priv->end_surface);
+		fade->priv->end_surface = NULL;
 	}
 }
 
@@ -164,7 +164,7 @@ mate_bg_crossfade_class_init (MateBGCrossfadeClass *fade_class)
 	 * MateBGCrossfade:width:
 	 *
 	 * When a crossfade is running, this is width of the fading
-	 * pixmap.
+	 * surface.
 	 */
 	g_object_class_install_property (gobject_class,
 					 PROP_WIDTH,
@@ -178,7 +178,7 @@ mate_bg_crossfade_class_init (MateBGCrossfadeClass *fade_class)
 	 * MateBGCrossfade:height:
 	 *
 	 * When a crossfade is running, this is height of the fading
-	 * pixmap.
+	 * surface.
 	 */
 	g_object_class_install_property (gobject_class,
 					 PROP_HEIGHT,
@@ -193,7 +193,7 @@ mate_bg_crossfade_class_init (MateBGCrossfadeClass *fade_class)
 	 * @window: the #GdkWindow the crossfade happend on.
 	 *
 	 * When a crossfade finishes, @window will have a copy
-	 * of the end pixmap as its background, and this signal will
+	 * of the end surface as its background, and this signal will
 	 * get emitted.
 	 */
 	signals[FINISHED] = g_signal_new ("finished",
@@ -210,8 +210,8 @@ mate_bg_crossfade_init (MateBGCrossfade *fade)
 {
 	fade->priv = MATE_BG_CROSSFADE_GET_PRIVATE (fade);
 
-	fade->priv->fading_pixmap = NULL;
-	fade->priv->end_pixmap = NULL;
+	fade->priv->fading_surface = NULL;
+	fade->priv->end_surface = NULL;
 	fade->priv->timeout_id = 0;
 }
 
@@ -221,11 +221,11 @@ mate_bg_crossfade_init (MateBGCrossfade *fade)
  * @height: The height of the crossfading window
  *
  * Creates a new object to manage crossfading a
- * window background between two #GdkPixmap drawables.
+ * window background between two #cairo_surface_ts.
  *
  * Return value: the new #MateBGCrossfade
  **/
-MateBGCrossfade* mate_bg_crossfade_new(int width, int height)
+MateBGCrossfade* mate_bg_crossfade_new (int width, int height)
 {
 	GObject* object;
 
@@ -237,28 +237,37 @@ MateBGCrossfade* mate_bg_crossfade_new(int width, int height)
 	return (MateBGCrossfade*) object;
 }
 
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static cairo_surface_t* tile_pixmap(cairo_surface_t* pixmap, int width, int height)
-#else
-	static GdkPixmap* tile_pixmap(GdkPixmap* pixmap, int width, int height)
-#endif
+static cairo_surface_t *
+tile_surface (cairo_surface_t *surface,
+              int              width,
+              int              height)
 {
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_surface_t* copy;
-	#else
-		GdkPixmap* copy;
-	#endif
-
+	cairo_surface_t *copy;
 	cairo_t *cr;
 
-	copy = gdk_pixmap_new(pixmap, width, height, pixmap == NULL? 24 : -1);
+#if GTK_CHECK_VERSION (3, 0, 0)
+	if (surface == NULL)
+	{
+		copy = gdk_window_create_similar_surface (gdk_get_default_root_window (),
+		                                          CAIRO_CONTENT_COLOR,
+		                                          width, height);
+	}
+	else
+	{
+		copy = cairo_surface_create_similar (surface,
+		                                     cairo_surface_get_content (surface),
+		                                     width, height);
+	}
+#else
+	copy = gdk_pixmap_new(surface, width, height, surface == NULL? 24 : -1);
+#endif
 
-	cr = gdk_cairo_create(copy);
+	cr = cairo_create (copy);
 
-	if (pixmap != NULL)
+	if (surface != NULL)
 	{
 		cairo_pattern_t *pattern;
-		gdk_cairo_set_source_pixmap (cr, pixmap, 0.0, 0.0);
+		cairo_set_source_surface (cr, surface, 0.0, 0.0);
 		pattern = cairo_get_source (cr);
 		cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
 	}
@@ -273,7 +282,7 @@ MateBGCrossfade* mate_bg_crossfade_new(int width, int height)
 
 	if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
 	{
-		g_object_unref (copy);
+		cairo_surface_destroy (copy);
 		copy = NULL;
 	}
 
@@ -283,36 +292,37 @@ MateBGCrossfade* mate_bg_crossfade_new(int width, int height)
 }
 
 /**
- * mate_bg_crossfade_set_start_pixmap:
+ * mate_bg_crossfade_set_start_surface:
  * @fade: a #MateBGCrossfade
- * @pixmap: The #GdkPixmap to fade from
+ * @surface: The cairo surface to fade from
  *
  * Before initiating a crossfade with mate_bg_crossfade_start()
- * a start and end pixmap have to be set.  This function sets
- * the pixmap shown at the beginning of the crossfade effect.
+ * a start and end surface have to be set.  This function sets
+ * the surface shown at the beginning of the crossfade effect.
  *
- * Return value: %TRUE if successful, or %FALSE if the pixmap
+ * Return value: %TRUE if successful, or %FALSE if the surface
  * could not be copied.
  **/
+gboolean
 #if GTK_CHECK_VERSION(3, 0, 0)
-	gboolean mate_bg_crossfade_set_start_pixmap(MateBGCrossfade* fade, cairo_surface_t* pixmap)
+mate_bg_crossfade_set_start_surface (MateBGCrossfade* fade, cairo_surface_t *surface)
 #else
-	gboolean mate_bg_crossfade_set_start_pixmap(MateBGCrossfade* fade, GdkPixmap* pixmap)
+mate_bg_crossfade_set_start_pixmap (MateBGCrossfade* fade, GdkPixmap *surface)
 #endif
 {
 	g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
 
-	if (fade->priv->fading_pixmap != NULL)
+	if (fade->priv->fading_surface != NULL)
 	{
-		g_object_unref (fade->priv->fading_pixmap);
-		fade->priv->fading_pixmap = NULL;
+		cairo_surface_destroy (fade->priv->fading_surface);
+		fade->priv->fading_surface = NULL;
 	}
 
-	fade->priv->fading_pixmap = tile_pixmap(pixmap,
-	                                        fade->priv->width,
-	                                        fade->priv->height);
+	fade->priv->fading_surface = tile_surface (surface,
+						   fade->priv->width,
+						   fade->priv->height);
 
-	return fade->priv->fading_pixmap != NULL;
+	return fade->priv->fading_surface != NULL;
 }
 
 static gdouble
@@ -331,38 +341,39 @@ get_current_time (void)
 }
 
 /**
- * mate_bg_crossfade_set_end_pixmap:
+ * mate_bg_crossfade_set_end_surface:
  * @fade: a #MateBGCrossfade
- * @pixmap: The #GdkPixmap to fade to
+ * @surface: The cairo surface to fade to
  *
  * Before initiating a crossfade with mate_bg_crossfade_start()
- * a start and end pixmap have to be set.  This function sets
- * the pixmap shown at the end of the crossfade effect.
+ * a start and end surface have to be set.  This function sets
+ * the surface shown at the end of the crossfade effect.
  *
- * Return value: %TRUE if successful, or %FALSE if the pixmap
+ * Return value: %TRUE if successful, or %FALSE if the surface
  * could not be copied.
  **/
+gboolean
 #if GTK_CHECK_VERSION(3, 0, 0)
-	gboolean mate_bg_crossfade_set_end_pixmap(MateBGCrossfade* fade, cairo_surface_t* pixmap)
+mate_bg_crossfade_set_end_surface (MateBGCrossfade* fade, cairo_surface_t *surface)
 #else
-	gboolean mate_bg_crossfade_set_end_pixmap(MateBGCrossfade* fade, GdkPixmap* pixmap)
+mate_bg_crossfade_set_end_pixmap (MateBGCrossfade* fade, GdkPixmap *surface)
 #endif
 {
 	g_return_val_if_fail (MATE_IS_BG_CROSSFADE (fade), FALSE);
 
-	if (fade->priv->end_pixmap != NULL) {
-		g_object_unref (fade->priv->end_pixmap);
-		fade->priv->end_pixmap = NULL;
+	if (fade->priv->end_surface != NULL) {
+		cairo_surface_destroy (fade->priv->end_surface);
+		fade->priv->end_surface = NULL;
 	}
 
-	fade->priv->end_pixmap = tile_pixmap (pixmap,
-					      fade->priv->width,
-					      fade->priv->height);
+	fade->priv->end_surface = tile_surface (surface,
+					        fade->priv->width,
+					        fade->priv->height);
 
 	/* Reset timer in case we're called while animating
 	 */
 	fade->priv->start_time = get_current_time ();
-	return fade->priv->end_pixmap != NULL;
+	return fade->priv->end_surface != NULL;
 }
 
 static gboolean
@@ -374,11 +385,7 @@ animations_are_disabled (MateBGCrossfade *fade)
 
 	g_assert (fade->priv->window != NULL);
 
-	#if GTK_CHECK_VERSION(2, 24, 0)
-		screen = gdk_window_get_screen(fade->priv->window);
-	#else // since 2.2
-		screen = gdk_drawable_get_screen(GDK_DRAWABLE(fade->priv->window));
-	#endif
+	screen = gdk_window_get_screen(fade->priv->window);
 
 	settings = gtk_settings_get_for_screen (screen);
 
@@ -391,9 +398,12 @@ static void
 draw_background (MateBGCrossfade *fade)
 {
 	if (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);
+		XClearArea (GDK_WINDOW_XDISPLAY (fade->priv->window),
+			    GDK_WINDOW_XID (fade->priv->window),
+			    0, 0,
+			    gdk_window_get_width (fade->priv->window),
+			    gdk_window_get_height (fade->priv->window),
+			    False);
 		gdk_flush ();
 	} else {
 		gdk_window_invalidate_rect (fade->priv->window, NULL, FALSE);
@@ -425,7 +435,7 @@ on_tick (MateBGCrossfade *fade)
 		return on_tick (fade);
 	}
 
-	if (fade->priv->fading_pixmap == NULL) {
+	if (fade->priv->fading_surface == NULL) {
 		return FALSE;
 	}
 
@@ -441,10 +451,10 @@ on_tick (MateBGCrossfade *fade)
 	 * even the fastest machines will get *some* fade because the framerate
 	 * is capped.
 	 */
-	cr = gdk_cairo_create (fade->priv->fading_pixmap);
+	cr = cairo_create (fade->priv->fading_surface);
 
-	gdk_cairo_set_source_pixmap (cr, fade->priv->end_pixmap,
-				     0.0, 0.0);
+	cairo_set_source_surface (cr, fade->priv->end_surface,
+				  0.0, 0.0);
 	cairo_paint_with_alpha (cr, percent_done);
 
 	status = cairo_status (cr);
@@ -462,20 +472,27 @@ on_finished (MateBGCrossfade *fade)
 	if (fade->priv->timeout_id == 0)
 		return;
 
-	g_assert (fade->priv->end_pixmap != NULL);
+	g_assert (fade->priv->end_surface != NULL);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+	cairo_pattern_t *pattern;
+	pattern = cairo_pattern_create_for_surface (fade->priv->end_surface);
+	gdk_window_set_background_pattern (fade->priv->window, pattern);
+	cairo_pattern_destroy (pattern);
+#else
 	gdk_window_set_back_pixmap (fade->priv->window,
-				    fade->priv->end_pixmap,
+				    fade->priv->end_surface,
 				    FALSE);
+#endif
 	draw_background (fade);
 
-	g_object_unref (fade->priv->end_pixmap);
-	fade->priv->end_pixmap = NULL;
+	cairo_surface_destroy (fade->priv->end_surface);
+	fade->priv->end_surface = NULL;
 
-	g_assert (fade->priv->fading_pixmap != NULL);
+	g_assert (fade->priv->fading_surface != NULL);
 
-	g_object_unref (fade->priv->fading_pixmap);
-	fade->priv->fading_pixmap = NULL;
+	cairo_surface_destroy (fade->priv->fading_surface);
+	fade->priv->fading_surface = NULL;
 
 	fade->priv->timeout_id = 0;
 	g_signal_emit (fade, signals[FINISHED], 0, fade->priv->window);
@@ -486,11 +503,11 @@ on_finished (MateBGCrossfade *fade)
  * @fade: a #MateBGCrossfade
  * @window: The #GdkWindow to draw crossfade on
  *
- * This function initiates a quick crossfade between two pixmaps on
+ * This function initiates a quick crossfade between two surfaces on
  * the background of @window.  Before initiating the crossfade both
  * mate_bg_crossfade_start() and mate_bg_crossfade_end() need to
  * be called. If animations are disabled, the crossfade is skipped,
- * and the window background is set immediately to the end pixmap.
+ * and the window background is set immediately to the end surface.
  **/
 void
 mate_bg_crossfade_start (MateBGCrossfade *fade,
@@ -501,8 +518,8 @@ mate_bg_crossfade_start (MateBGCrossfade *fade,
 
 	g_return_if_fail (MATE_IS_BG_CROSSFADE (fade));
 	g_return_if_fail (window != NULL);
-	g_return_if_fail (fade->priv->fading_pixmap != NULL);
-	g_return_if_fail (fade->priv->end_pixmap != NULL);
+	g_return_if_fail (fade->priv->fading_surface != NULL);
+	g_return_if_fail (fade->priv->end_surface != NULL);
 	g_return_if_fail (!mate_bg_crossfade_is_started (fade));
 	g_return_if_fail (GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN);
 
@@ -516,9 +533,16 @@ mate_bg_crossfade_start (MateBGCrossfade *fade,
 	g_source_unref (source);
 
 	fade->priv->window = window;
+#if GTK_CHECK_VERSION (3, 0, 0)
+	cairo_pattern_t *pattern;
+	pattern = cairo_pattern_create_for_surface (fade->priv->fading_surface);
+	gdk_window_set_background_pattern (fade->priv->window, pattern);
+	cairo_pattern_destroy (pattern);
+#else
 	gdk_window_set_back_pixmap (fade->priv->window,
-				    fade->priv->fading_pixmap,
+				    fade->priv->fading_surface,
 				    FALSE);
+#endif
 	draw_background (fade);
 
 	fade->priv->is_first_frame = TRUE;
diff --git a/libmate-desktop/mate-bg.c b/libmate-desktop/mate-bg.c
index 0e95471..1423415 100644
--- a/libmate-desktop/mate-bg.c
+++ b/libmate-desktop/mate-bg.c
@@ -34,19 +34,24 @@ Author: Soren Sandmann <[email protected]>
 
 #include <gio/gio.h>
 
-#include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
 
 #include <cairo.h>
 
-#include <gio/gio.h>
-
 #define MATE_DESKTOP_USE_UNSTABLE_API
 #include <libmateui/mate-bg.h>
 #include <libmateui/mate-bg-crossfade.h>
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+# include <cairo-xlib.h>
+#else
+#define cairo_surface_t GdkPixmap
+#define cairo_create gdk_cairo_create
+#define cairo_surface_destroy g_object_unref
+#endif
+
 #define BG_KEY_DRAW_BACKGROUND    "draw-background"
 #define BG_KEY_PRIMARY_COLOR      "primary-color"
 #define BG_KEY_SECONDARY_COLOR    "secondary-color"
@@ -129,11 +134,13 @@ static guint signals[N_SIGNALS] = {0};
 
 G_DEFINE_TYPE(MateBG, mate_bg, G_TYPE_OBJECT)
 
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static cairo_surface_t* make_root_pixmap(GdkScreen* screen, gint width, gint height);
+#if GTK_CHECK_VERSION (3, 0, 0)
+static cairo_surface_t *make_root_pixmap     (GdkScreen  *screen,
 #else
-	static GdkPixmap* make_root_pixmap(GdkScreen* screen, gint width, gint height);
+static GdkPixmap       *make_root_pixmap     (GdkScreen  *screen,
 #endif
+                                              gint        width,
+                                              gint        height);
 
 /* Pixbuf utils */
 static guint32    pixbuf_average_value (GdkPixbuf  *pixbuf);
@@ -144,12 +151,11 @@ static GdkPixbuf *pixbuf_scale_to_min  (GdkPixbuf  *src,
 					int         min_width,
 					int         min_height);
 
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static void pixbuf_draw_gradient(GdkPixbuf* pixbuf, gboolean horizontal, GdkColor* c1, GdkColor* c2, cairo_rectangle_int_t* rect);
-#else
-	static void pixbuf_draw_gradient(GdkPixbuf* pixbuf, gboolean horizontal, GdkColor* c1, GdkColor* c2, GdkRectangle* rect);
-#endif
-
+static void       pixbuf_draw_gradient (GdkPixbuf    *pixbuf,
+					gboolean      horizontal,
+					GdkColor     *c1,
+					GdkColor     *c2,
+					GdkRectangle *rect);
 
 static void       pixbuf_tile          (GdkPixbuf  *src,
 					GdkPixbuf  *dest);
@@ -615,27 +621,20 @@ mate_bg_set_filename (MateBG     *bg,
 	}
 }
 
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static void draw_color_area(MateBG* bg, GdkPixbuf* dest, cairo_rectangle_int_t* rect)
-#else
-	static void draw_color_area(MateBG* bg, GdkPixbuf* dest, GdkRectangle* rect)
-#endif
+static void
+draw_color_area (MateBG *bg,
+		 GdkPixbuf *dest,
+		 GdkRectangle *rect)
 {
 	guint32 pixel;
-
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_rectangle_int_t extent;
-	#else
-		GdkRectangle extent;
-	#endif
-
+	GdkRectangle extent;
 
         extent.x = 0;
         extent.y = 0;
         extent.width = gdk_pixbuf_get_width (dest);
         extent.height = gdk_pixbuf_get_height (dest);
 
-	gdk_rectangle_intersect(rect, &extent, rect);
+	gdk_rectangle_intersect (rect, &extent, rect);
 
 	switch (bg->color_type) {
 	case MATE_BG_COLOR_SOLID:
@@ -666,11 +665,7 @@ draw_color (MateBG *bg,
 	    GdkPixbuf *dest,
 	    GdkScreen *screen)
 {
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_rectangle_int_t rect;
-	#else
-		GdkRectangle rect;
-	#endif
+	GdkRectangle rect;
 
 	rect.x = 0;
 	rect.y = 0;
@@ -684,11 +679,7 @@ draw_color_each_monitor (MateBG *bg,
 			 GdkPixbuf *dest,
 			 GdkScreen *screen)
 {
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_rectangle_int_t rect;
-	#else
-		GdkRectangle rect;
-	#endif
+	GdkRectangle rect;
 	gint num_monitors;
 	int monitor;
 
@@ -780,11 +771,11 @@ get_scaled_pixbuf (MateBGPlacement placement,
 }
 
 
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static void draw_image_area(MateBGPlacement placement, GdkPixbuf* pixbuf, GdkPixbuf* dest, cairo_rectangle_int_t* area)
-#else
-	static void draw_image_area(MateBGPlacement placement, GdkPixbuf* pixbuf, GdkPixbuf* dest, GdkRectangle* area)
-#endif
+static void
+draw_image_area (MateBGPlacement   placement,
+		 GdkPixbuf        *pixbuf,
+		 GdkPixbuf        *dest,
+		 GdkRectangle     *area)
 {
 	int dest_width = area->width;
 	int dest_height = area->height;
@@ -822,11 +813,7 @@ draw_image (MateBGPlacement  placement,
 	    GdkPixbuf        *pixbuf,
 	    GdkPixbuf        *dest)
 {
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_rectangle_int_t rect;
-	#else
-		GdkRectangle rect;
-	#endif
+	GdkRectangle rect;
 
 	rect.x = 0;
 	rect.y = 0;
@@ -841,12 +828,7 @@ draw_once (MateBG   *bg,
 	   GdkPixbuf *dest,
 	   GdkScreen *screen)
 {
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_rectangle_int_t rect;
-	#else
-		GdkRectangle rect;
-	#endif
-
+	GdkRectangle rect;
 	GdkPixbuf   *pixbuf;
 
 	rect.x = 0;
@@ -869,11 +851,7 @@ draw_each_monitor (MateBG   *bg,
 		   GdkPixbuf *dest,
 		   GdkScreen *screen)
 {
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_rectangle_int_t rect;
-	#else
-		GdkRectangle rect;
-	#endif
+	GdkRectangle rect;
 	gint num_monitors;
 	int monitor;
 
@@ -962,39 +940,41 @@ mate_bg_get_pixmap_size (MateBG   *bg,
 }
 
 /**
- * mate_bg_get_pixmap:
+ * mate_bg_create_surface:
  * @bg: MateBG
  * @window:
  * @width:
  * @height:
+ * @is_root:
  *
- * Create a pixmap that can be set as background for @window. If @root is TRUE,
- * the pixmap created will be created by a temporary X server connection so
- * that if someone calls XKillClient on it, it won't affect the application who
- * created it.
- *
- * Since: 2.20
+ * Create a surface that can be set as background for @window. If @is_root is
+ * TRUE, the surface created will be created by a temporary X server connection
+ * so that if someone calls XKillClient on it, it won't affect the application
+ * who created it.
  **/
-#if GTK_CHECK_VERSION(3, 0, 0)
-	cairo_surface_t* mate_bg_create_pixmap(MateBG* bg, GdkWindow* window, int width, int height, gboolean is_root)
+#if GTK_CHECK_VERSION (3, 0, 0)
+cairo_surface_t *
+mate_bg_create_surface (MateBG      *bg,
 #else
-	GdkPixmap* mate_bg_create_pixmap(MateBG* bg, GdkWindow* window, int width, int height, gboolean is_root)
+GdkPixmap *
+mate_bg_create_pixmap  (MateBG      *bg,
 #endif
+		 	GdkWindow   *window,
+			int	     width,
+			int	     height,
+			gboolean     is_root)
 {
 	int pm_width, pm_height;
 
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_surface_t* pixmap;
-	#else
-		GdkPixmap* pixmap;
-	#endif
+	cairo_surface_t *surface;
 	cairo_t *cr;
 
 	g_return_val_if_fail (bg != NULL, NULL);
 	g_return_val_if_fail (window != NULL, NULL);
 
 	if (bg->last_pixmap_width != width ||
-	    bg->last_pixmap_height != height)  {
+	    bg->last_pixmap_height != height)
+	{
 		if (bg->pixbuf_cache) {
 			g_object_unref (bg->pixbuf_cache);
 			bg->pixbuf_cache = NULL;
@@ -1006,34 +986,33 @@ mate_bg_get_pixmap_size (MateBG   *bg,
 	/* has the side effect of loading and caching pixbuf only when in tile mode */
 	mate_bg_get_pixmap_size (bg, width, height, &pm_width, &pm_height);
 
-	if (is_root) {
-
-		#if GTK_CHECK_VERSION(2, 24, 0)
-			pixmap = make_root_pixmap(gdk_window_get_screen(window), pm_width, pm_height);
-		#else // since 2.2
-			pixmap = make_root_pixmap(gdk_drawable_get_screen(GDK_DRAWABLE(window)), pm_width, pm_height);
-		#endif
-
+	if (is_root)
+	{
+		surface = make_root_pixmap (gdk_window_get_screen(window),
+					    pm_width, pm_height);
 	}
-	else {
-		pixmap = gdk_pixmap_new (window, pm_width, pm_height, -1);
+	else
+	{
+#if GTK_CHECK_VERSION (3, 0, 0)
+		surface = gdk_window_create_similar_surface (window,
+                                                             CAIRO_CONTENT_COLOR,
+                                                             pm_width, pm_height);
+#else
+		surface = gdk_pixmap_new (window, pm_width, pm_height, -1);
+#endif
 	}
 
-	cr = gdk_cairo_create (pixmap);
+	cr = cairo_create (surface);
 	if (!bg->filename && bg->color_type == MATE_BG_COLOR_SOLID) {
 		gdk_cairo_set_source_color (cr, &(bg->primary));
 	}
-	else {
+	else
+	{
 		GdkPixbuf *pixbuf;
 
-		pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
-
-		#if GTK_CHECK_VERSION(2, 24, 0)
-			mate_bg_draw(bg, pixbuf, gdk_window_get_screen(window), is_root);
-		#else // since 2.2
-			mate_bg_draw(bg, pixbuf, gdk_drawable_get_screen(GDK_DRAWABLE(window)), is_root);
-		#endif
-
+		pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
+					 width, height);
+		mate_bg_draw (bg, pixbuf, gdk_window_get_screen (window), is_root);
 		gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
 		g_object_unref (pixbuf);
 	}
@@ -1042,7 +1021,7 @@ mate_bg_get_pixmap_size (MateBG   *bg,
 
 	cairo_destroy (cr);
 
-	return pixmap;
+	return surface;
 }
 
 
@@ -1092,23 +1071,17 @@ mate_bg_is_dark (MateBG *bg,
  * Create a persistent pixmap. We create a separate display
  * and set the closedown mode on it to RetainPermanent.
  */
-
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static cairo_surface_t* make_root_pixmap(GdkScreen* screen, gint width, gint height)
+#if GTK_CHECK_VERSION (3, 0, 0)
+static cairo_surface_t *
 #else
-	static GdkPixmap* make_root_pixmap(GdkScreen* screen, gint width, gint height)
+static GdkPixmap *
 #endif
+make_root_pixmap (GdkScreen *screen, gint width, gint height)
 {
-	Display* display;
-	const char* display_name;
+	Display *display;
+	const char *display_name;
 	Pixmap result;
-
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_surface_t* gdk_pixmap;
-	#else
-		GdkPixmap* gdk_pixmap;
-	#endif
-
+	cairo_surface_t *surface;
 	int screen_num;
 	int depth;
 
@@ -1141,14 +1114,21 @@ mate_bg_is_dark (MateBG *bg,
 
 	XCloseDisplay (display);
 
-	gdk_pixmap = gdk_pixmap_foreign_new_for_screen (screen, result,
+#if GTK_CHECK_VERSION (3, 0, 0)
+	surface = cairo_xlib_surface_create (GDK_SCREEN_XDISPLAY (screen),
+                                             result,
+                                             GDK_VISUAL_XVISUAL (gdk_screen_get_system_visual (screen)),
+        				     width, height);
+#else
+	surface = gdk_pixmap_foreign_new_for_screen (screen, result,
 							width, height, depth);
 
 	gdk_drawable_set_colormap (
-		GDK_DRAWABLE (gdk_pixmap),
+		GDK_DRAWABLE (surface),
 		gdk_drawable_get_colormap (gdk_screen_get_root_window (screen)));
+#endif
 
-	return gdk_pixmap;
+	return surface;
 }
 
 static gboolean
@@ -1256,21 +1236,23 @@ mate_bg_create_thumbnail (MateBG               *bg,
 }
 
 /**
- * mate_bg_get_pixmap_from_root:
+ * mate_bg_get_surface_from_root:
  * @screen: a #GdkScreen
  *
  * This function queries the _XROOTPMAP_ID property from
  * the root window associated with @screen to determine
- * the current root window background pixmap and returns
+ * the current root window background surface and returns
  * a copy of it. If the _XROOTPMAP_ID is not set, then
- * a black pixmap is returned.
+ * a black surface is returned.
  *
- * Return value: a #GdkPixmap if successful or %NULL
+ * Return value: a #cairo_surface_t if successful or %NULL
  **/
-#if GTK_CHECK_VERSION(3, 0, 0)
-	cairo_surface_t* mate_bg_get_pixmap_from_root(GdkScreen* screen)
+#if GTK_CHECK_VERSION (3, 0, 0)
+cairo_surface_t *
+mate_bg_get_surface_from_root (GdkScreen *screen)
 #else
-	GdkPixmap* mate_bg_get_pixmap_from_root(GdkScreen* screen)
+GdkPixmap *
+mate_bg_get_pixmap_from_root (GdkScreen *screen)
 #endif
 {
 	int result;
@@ -1281,17 +1263,10 @@ mate_bg_create_thumbnail (MateBG               *bg,
 	Atom type;
 	Display *display;
 	int screen_num;
-
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_surface_t* pixmap;
-		cairo_surface_t* source_pixmap;
-	#else
-		GdkPixmap* pixmap;
-		GdkPixmap* source_pixmap;
-	#endif
+	cairo_surface_t *surface;
+	cairo_surface_t *source_pixmap;
 	int width, height;
 	cairo_t *cr;
-	cairo_pattern_t *pattern;
 
 	display = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen));
 	screen_num = gdk_screen_get_number (screen);
@@ -1302,7 +1277,7 @@ mate_bg_create_thumbnail (MateBG               *bg,
 				     0L, 1L, False, XA_PIXMAP,
 				     &type, &format, &nitems, &bytes_after,
 				     &data);
-	pixmap = NULL;
+	surface = NULL;
 	source_pixmap = NULL;
 
 	if (result != Success || type != XA_PIXMAP ||
@@ -1313,6 +1288,26 @@ mate_bg_create_thumbnail (MateBG               *bg,
 
 	if (data != NULL) {
 		gdk_error_trap_push ();
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+		Pixmap xpixmap = *(Pixmap *) data;
+		Window root_return;
+		int x_ret, y_ret;
+		unsigned int w_ret, h_ret, bw_ret, depth_ret;
+
+		if (XGetGeometry (GDK_SCREEN_XDISPLAY (screen),
+				  xpixmap,
+				  &root_return,
+				  &x_ret, &y_ret, &w_ret, &h_ret, &bw_ret, &depth_ret))
+		{
+			source_pixmap = cairo_xlib_surface_create (GDK_SCREEN_XDISPLAY (screen),
+								   xpixmap,
+								   GDK_VISUAL_XVISUAL (gdk_screen_get_system_visual (screen)),
+								   w_ret, h_ret);
+		}
+
+		gdk_error_trap_pop ();
+#else
 		source_pixmap = gdk_pixmap_foreign_new (*(Pixmap *) data);
 		gdk_error_trap_pop ();
 
@@ -1320,19 +1315,44 @@ mate_bg_create_thumbnail (MateBG               *bg,
 			gdk_drawable_set_colormap (source_pixmap,
 						   gdk_screen_get_default_colormap (screen));
 		}
+#endif
 	}
 
 	width = gdk_screen_get_width (screen);
 	height = gdk_screen_get_height (screen);
 
-	pixmap = gdk_pixmap_new (source_pixmap != NULL? source_pixmap :
+#if GTK_CHECK_VERSION (3, 0, 0)
+	if (source_pixmap) {
+		surface = cairo_surface_create_similar (source_pixmap,
+							CAIRO_CONTENT_COLOR,
+							width, height);
+
+		cr = cairo_create (surface);
+		cairo_set_source_surface (cr, source_pixmap, 0, 0);
+		cairo_paint (cr);
+
+		if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) {
+			cairo_surface_destroy (surface);
+			surface = NULL;
+		}
+
+		cairo_destroy (cr);
+	}
+
+	if (surface == NULL) {
+		surface = gdk_window_create_similar_surface (gdk_screen_get_root_window (screen),
+							     CAIRO_CONTENT_COLOR,
+							     width, height);
+	}
+#else
+	surface = gdk_pixmap_new (source_pixmap != NULL? source_pixmap :
 				 gdk_screen_get_root_window (screen),
 				 width, height, -1);
 
-	cr = gdk_cairo_create (pixmap);
+	cr = gdk_cairo_create (surface);
 	if (source_pixmap != NULL) {
 		gdk_cairo_set_source_pixmap (cr, source_pixmap, 0, 0);
-		pattern = cairo_get_source (cr);
+		cairo_pattern_t *pattern = cairo_get_source (cr);
 		cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
 	} else {
 		cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
@@ -1340,25 +1360,24 @@ mate_bg_create_thumbnail (MateBG               *bg,
 	cairo_paint (cr);
 
 	if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) {
-		g_object_unref (pixmap);
-		pixmap = NULL;
+		g_object_unref (surface);
+		surface = NULL;
 	}
 	cairo_destroy (cr);
+#endif
 
 	if (source_pixmap != NULL)
-		g_object_unref (source_pixmap);
+		cairo_surface_destroy (source_pixmap);
 
 	if (data != NULL)
 		XFree (data);
 
-	return pixmap;
+	return surface;
 }
 
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static void mate_bg_set_root_pixmap_id(GdkScreen* screen, cairo_surface_t* pixmap)
-#else
-	static void mate_bg_set_root_pixmap_id(GdkScreen* screen, GdkPixmap* pixmap)
-#endif
+static void
+mate_bg_set_root_pixmap_id (GdkScreen       *screen,
+			    cairo_surface_t *surface)
 {
 	int      result;
 	gint     format;
@@ -1395,7 +1414,11 @@ mate_bg_create_thumbnail (MateBG               *bg,
 		XFree (data_esetroot);
 	}
 
-	pixmap_id = GDK_WINDOW_XWINDOW (pixmap);
+#if GTK_CHECK_VERSION (3, 0, 0)
+	pixmap_id = cairo_xlib_surface_get_drawable (surface);
+#else
+	pixmap_id = GDK_WINDOW_XWINDOW (surface);
+#endif
 
 	XChangeProperty (display, RootWindow (display, screen_num),
 			 gdk_x11_get_xatom_by_name ("ESETROOT_PMAP_ID"),
@@ -1408,28 +1431,34 @@ mate_bg_create_thumbnail (MateBG               *bg,
 }
 
 /**
- * mate_bg_set_pixmap_as_root:
+ * mate_bg_set_surface_as_root:
  * @screen: the #GdkScreen to change root background on
- * @pixmap: the #GdkPixmap to set root background from
+ * @surface: the #cairo_surface_t to set root background from.
+ *   Must be an xlib surface backing a pixmap.
  *
  * Set the root pixmap, and properties pointing to it. We
  * do this atomically with a server grab 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).  @pixmap should come from a call
- * to mate_bg_create_pixmap().
+ * same conventions we do).  @surface should come from a call
+ * to mate_bg_create_surface().
  **/
-#if GTK_CHECK_VERSION(3, 0, 0)
-	void mate_bg_set_pixmap_as_root(GdkScreen* screen, cairo_surface_t* pixmap)
+void
+#if GTK_CHECK_VERSION (3, 0, 0)
+mate_bg_set_surface_as_root (GdkScreen *screen, cairo_surface_t *surface)
 #else
-	void mate_bg_set_pixmap_as_root(GdkScreen* screen, GdkPixmap* pixmap)
+mate_bg_set_pixmap_as_root  (GdkScreen *screen, GdkPixmap *surface)
 #endif
 {
 	Display *display;
 	int      screen_num;
 
 	g_return_if_fail (screen != NULL);
-	g_return_if_fail (pixmap != NULL);
+#if GTK_CHECK_VERSION (3, 0, 0)
+	g_return_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_XLIB);
+#else
+	g_return_if_fail (surface != NULL);
+#endif
 
 	screen_num = gdk_screen_get_number (screen);
 
@@ -1437,10 +1466,14 @@ mate_bg_create_thumbnail (MateBG               *bg,
 
 	gdk_x11_display_grab (gdk_screen_get_display (screen));
 
-	mate_bg_set_root_pixmap_id (screen, pixmap);
+	mate_bg_set_root_pixmap_id (screen, surface);
 
 	XSetWindowBackgroundPixmap (display, RootWindow (display, screen_num),
-				    GDK_PIXMAP_XID (pixmap));
+#if GTK_CHECK_VERSION (3, 0, 0)
+				    cairo_xlib_surface_get_drawable (surface));
+#else
+				    GDK_PIXMAP_XID (surface));
+#endif
 	XClearWindow (display, RootWindow (display, screen_num));
 
 	gdk_display_flush (gdk_screen_get_display (screen));
@@ -1448,39 +1481,36 @@ mate_bg_create_thumbnail (MateBG               *bg,
 }
 
 /**
- * mate_bg_set_pixmap_as_root_with_crossfade:
+ * mate_bg_set_surface_as_root_with_crossfade:
  * @screen: the #GdkScreen to change root background on
- * @pixmap: the #GdkPixmap to set root background from
+ * @surface: the cairo xlib surface to set root background from
  * @context: a #GMainContext or %NULL
  *
  * Set the root pixmap, and properties pointing to it.
- * This function differs from mate_bg_set_pixmap_as_root()
+ * This function differs from mate_bg_set_surface_as_root()
  * in that it adds a subtle crossfade animation from the
  * current root pixmap to the new one.
- * same conventions we do).
  *
  * Return value: a #MateBGCrossfade object
  **/
-#if GTK_CHECK_VERSION(3, 0, 0)
-	MateBGCrossfade* mate_bg_set_pixmap_as_root_with_crossfade(GdkScreen* screen, cairo_surface_t* pixmap)
+MateBGCrossfade *
+#if GTK_CHECK_VERSION (3, 0, 0)
+mate_bg_set_surface_as_root_with_crossfade (GdkScreen       *screen,
+		 			    cairo_surface_t *surface)
 #else
-	MateBGCrossfade* mate_bg_set_pixmap_as_root_with_crossfade(GdkScreen* screen, GdkPixmap* pixmap)
+mate_bg_set_pixmap_as_root_with_crossfade (GdkScreen *screen,
+		 			   GdkPixmap *surface)
 #endif
 {
 	GdkDisplay *display;
 	GdkWindow *root_window;
-
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		cairo_surface_t* old_pixmap;
-	#else
-		GdkPixmap* old_pixmap;
-	#endif
+	cairo_surface_t *old_surface;
 
 	int      width, height;
 	MateBGCrossfade *fade;
 
 	g_return_val_if_fail (screen != NULL, NULL);
-	g_return_val_if_fail (pixmap != NULL, NULL);
+	g_return_val_if_fail (surface != NULL, NULL);
 
 	root_window = gdk_screen_get_root_window (screen);
 
@@ -1491,11 +1521,19 @@ mate_bg_create_thumbnail (MateBG               *bg,
 
 	display = gdk_screen_get_display (screen);
 	gdk_x11_display_grab (display);
-	old_pixmap = mate_bg_get_pixmap_from_root (screen);
-	mate_bg_set_root_pixmap_id (screen, pixmap);
-	mate_bg_crossfade_set_start_pixmap (fade, old_pixmap);
-	g_object_unref (old_pixmap);
-	mate_bg_crossfade_set_end_pixmap (fade, pixmap);
+#if GTK_CHECK_VERSION (3, 0, 0)
+	old_surface = mate_bg_get_surface_from_root (screen);
+	mate_bg_set_root_pixmap_id (screen, surface);
+	mate_bg_crossfade_set_start_surface (fade, old_surface);
+	cairo_surface_destroy (old_surface);
+	mate_bg_crossfade_set_end_surface (fade, surface);
+#else
+	old_surface = mate_bg_get_pixmap_from_root (screen);
+	mate_bg_set_root_pixmap_id (screen, surface);
+	mate_bg_crossfade_set_start_pixmap (fade, old_surface);
+	cairo_surface_destroy (old_surface);
+	mate_bg_crossfade_set_end_pixmap (fade, surface);
+#endif
 	gdk_display_flush (display);
 	gdk_x11_display_ungrab (display);
 
@@ -2363,11 +2401,12 @@ create_gradient (const GdkColor *primary,
 	return result;
 }
 
-#if GTK_CHECK_VERSION(3, 0, 0)
-	static void pixbuf_draw_gradient(GdkPixbuf* pixbuf, gboolean horizontal, GdkColor* primary, GdkColor* secondary, cairo_rectangle_int_t* rect)
-#else
-	static void pixbuf_draw_gradient(GdkPixbuf* pixbuf, gboolean horizontal, GdkColor* primary, GdkColor* secondary, GdkRectangle* rect)
-#endif
+static void
+pixbuf_draw_gradient (GdkPixbuf    *pixbuf,
+		      gboolean      horizontal,
+		      GdkColor     *primary,
+		      GdkColor     *secondary,
+		      GdkRectangle *rect)
 {
 	int width;
 	int height;