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diff -up gtk+-2.91.3/gtk/gtktooltip.c.fresh-tooltips gtk+-2.91.3/gtk/gtktooltip.c
--- gtk+-2.91.3/gtk/gtktooltip.c.fresh-tooltips	2010-10-31 14:28:19.000000000 -0400
+++ gtk+-2.91.3/gtk/gtktooltip.c	2010-11-01 14:12:41.027410023 -0400
@@ -35,6 +35,9 @@
 #include "gtkalignment.h"
 #include "gtksizerequest.h"
 
+#ifdef GDK_WINDOWING_X11
+#include "gdk/x11/gdkx.h"
+#endif
 
 /**
  * SECTION:gtktooltip
@@ -165,6 +168,7 @@ static void       gtk_tooltip_display_cl
 						    GtkTooltip      *tooltip);
 static void       gtk_tooltip_set_last_window      (GtkTooltip      *tooltip,
 						    GdkWindow       *window);
+static void       update_shape                     (GtkTooltip      *tooltip);
 
 
 G_DEFINE_TYPE (GtkTooltip, gtk_tooltip, G_TYPE_OBJECT);
@@ -180,6 +184,40 @@ gtk_tooltip_class_init (GtkTooltipClass 
 }
 
 static void
+on_composited_changed (GtkWidget  *window,
+                       GtkTooltip *tooltip)
+{
+  update_shape (tooltip);
+}
+
+static void
+on_screen_changed (GtkWidget  *window,
+                   GdkScreen  *previous,
+                   GtkTooltip *tooltip)
+{
+  GdkScreen *screen;
+  GdkVisual *visual;
+
+  screen = gtk_widget_get_screen (window);
+
+
+  visual = NULL;
+  if (gdk_screen_is_composited (screen))
+    visual = gdk_screen_get_rgba_visual (screen);
+  if (visual == NULL)
+    visual = gdk_screen_get_system_visual (screen);
+
+  gtk_widget_set_visual (window, visual);
+}
+
+static void
+on_realized (GtkWidget  *window,
+             GtkTooltip *tooltip)
+{
+  update_shape (tooltip);
+}
+
+static void
 gtk_tooltip_init (GtkTooltip *tooltip)
 {
   GtkStyle *style;
@@ -199,8 +237,12 @@ gtk_tooltip_init (GtkTooltip *tooltip)
   tooltip->last_window = NULL;
 
   tooltip->window = g_object_ref (gtk_window_new (GTK_WINDOW_POPUP));
+
+  on_screen_changed (tooltip->window, NULL, tooltip);
+
   gtk_window_set_type_hint (GTK_WINDOW (tooltip->window),
 			    GDK_WINDOW_TYPE_HINT_TOOLTIP);
+
   gtk_widget_set_app_paintable (tooltip->window, TRUE);
   gtk_window_set_resizable (GTK_WINDOW (tooltip->window), FALSE);
   gtk_widget_set_name (tooltip->window, "gtk-tooltip");
@@ -234,6 +276,13 @@ gtk_tooltip_init (GtkTooltip *tooltip)
   gtk_box_pack_start (GTK_BOX (tooltip->box), tooltip->label,
 		      FALSE, FALSE, 0);
 
+  g_signal_connect (tooltip->window, "composited-changed",
+                    G_CALLBACK (on_composited_changed), tooltip);
+  g_signal_connect (tooltip->window, "screen-changed",
+                    G_CALLBACK (on_screen_changed), tooltip);
+  g_signal_connect (tooltip->window, "realize",
+                    G_CALLBACK (on_realized), tooltip);
+
   tooltip->custom_widget = NULL;
 }
 
@@ -583,19 +632,209 @@ gtk_tooltip_window_style_set (GtkTooltip
   gtk_widget_queue_draw (tooltip->window);
 }
 
+static void
+draw_round_rect (cairo_t *cr,
+                 gdouble  aspect,
+                 gdouble  x,
+                 gdouble  y,
+                 gdouble  corner_radius,
+                 gdouble  width,
+                 gdouble  height)
+{
+  gdouble radius = corner_radius / aspect;
+
+  cairo_move_to (cr, x + radius, y);
+
+  /* top-right, left of the corner */
+  cairo_line_to (cr, x + width - radius, y);
+
+  /* top-right, below the corner */
+  cairo_arc (cr,
+             x + width - radius, y + radius, radius,
+             -90.0f * G_PI / 180.0f, 0.0f * G_PI / 180.0f);
+
+  /* bottom-right, above the corner */
+  cairo_line_to (cr, x + width, y + height - radius);
+
+  /* bottom-right, left of the corner */
+  cairo_arc (cr,
+             x + width - radius, y + height - radius, radius,
+             0.0f * G_PI / 180.0f, 90.0f * G_PI / 180.0f);
+
+  /* bottom-left, right of the corner */
+  cairo_line_to (cr, x + radius, y + height);
+
+  /* bottom-left, above the corner */
+  cairo_arc (cr,
+             x + radius, y + height - radius, radius,
+             90.0f * G_PI / 180.0f, 180.0f * G_PI / 180.0f);
+
+  /* top-left, below the corner */
+  cairo_line_to (cr, x, y + radius);
+
+  /* top-left, right of the corner */
+  cairo_arc (cr,
+             x + radius, y + radius, radius,
+             180.0f * G_PI / 180.0f, 270.0f * G_PI / 180.0f);
+
+  cairo_close_path (cr);
+}
+
+static void
+fill_background (GtkWidget  *widget,
+                 cairo_t    *cr)
+{
+  GdkColor color;
+  gdouble  r, g, b;
+  gint     radius;
+  gdouble  background_alpha;
+  GtkStyle *style;
+  GtkAllocation allocation;
+
+  if (gdk_screen_is_composited (gtk_widget_get_screen (widget)))
+    background_alpha = 0.90;
+  else
+    background_alpha = 1.0;
+
+  style = gtk_widget_get_style (widget);
+
+  radius = MIN (style->xthickness, style->ythickness);
+  radius = MAX (radius, 1);
+
+  cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+  cairo_paint (cr);
+  cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  draw_round_rect (cr,
+                   1.0, 0.5, 0.5, radius,
+                   allocation.width - 1,
+                   allocation.height - 1);
+
+  color = style->bg [GTK_STATE_NORMAL];
+  r = (float)color.red / 65535.0;
+  g = (float)color.green / 65535.0;
+  b = (float)color.blue / 65535.0;
+  cairo_set_source_rgba (cr, r, g, b, background_alpha);
+  cairo_fill_preserve (cr);
+
+  color = style->bg [GTK_STATE_SELECTED];
+  r = (float) color.red / 65535.0;
+  g = (float) color.green / 65535.0;
+  b = (float) color.blue / 65535.0;
+
+  cairo_set_source_rgba (cr, r, g, b, background_alpha);
+  cairo_set_line_width (cr, 1.0);
+  cairo_stroke (cr);
+}
+
+static void
+update_shape (GtkTooltip *tooltip)
+{
+  GdkScreen *screen;
+  cairo_t *cr;
+  cairo_surface_t *surface;
+  cairo_region_t *region;
+  gint width, height;
+  gboolean new_style;
+  gint radius;
+  GtkStyle *style;
+
+  gtk_widget_style_get (tooltip->window, "new-tooltip-style", &new_style, NULL);
+
+  if (!new_style)
+    {
+      gtk_widget_shape_combine_region (tooltip->window, NULL);
+     return;
+    }
+
+  screen = gtk_widget_get_screen (tooltip->window);
+  style = gtk_widget_get_style (tooltip->window);
+
+  gtk_window_get_size (GTK_WINDOW (tooltip->window), &width, &height);
+
+  if (gdk_screen_is_composited (screen))
+    {
+      const char *wm;
+
+      gtk_widget_shape_combine_region (tooltip->window, NULL);
+#ifdef GDK_WINDOWING_X11
+      /* This is a hack to keep the Metacity compositor from slapping a
+       * non-shaped shadow around the shaped tooltip
+       */
+      if (!gtk_widget_get_mapped (tooltip->window))
+        {
+          wm = gdk_x11_screen_get_window_manager_name (screen);
+          if (g_strcmp0 (wm, "Metacity") == 0)
+            gtk_window_set_type_hint (GTK_WINDOW (tooltip->window),
+                                     GDK_WINDOW_TYPE_HINT_DND);
+        }
+#endif
+      return;
+    }
+
+  radius = MIN (style->xthickness, style->ythickness);
+  radius = MAX (radius, 1);
+  surface = cairo_image_surface_create (CAIRO_FORMAT_A8, width, height);
+  cr = cairo_create (surface);
+  if (cairo_status (cr) == CAIRO_STATUS_SUCCESS)
+    {
+      cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+      cairo_paint (cr);
+
+      cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+      cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+      draw_round_rect (cr, 1.0, 0, 0, radius + 1, width, height);
+      cairo_fill (cr);
+      region = gdk_cairo_region_create_from_surface (surface);
+      gtk_widget_shape_combine_region (tooltip->window, region);
+      cairo_region_destroy (region);
+    }
+  cairo_destroy (cr);
+  cairo_surface_destroy (surface);
+}
+
 static gboolean
 gtk_tooltip_paint_window (GtkTooltip *tooltip,
-                          cairo_t    *cr)
+                          cairo_t    *context)
 {
-  gtk_paint_flat_box (gtk_widget_get_style (tooltip->window),
-		      cr,
-		      GTK_STATE_NORMAL,
-		      GTK_SHADOW_OUT,
-		      tooltip->window,
-		      "tooltip",
-		      0, 0,
-                      gtk_widget_get_allocated_width (tooltip->window),
-                      gtk_widget_get_allocated_height (tooltip->window));
+  gboolean new_style;
+
+  gtk_widget_style_get (tooltip->window, "new-tooltip-style", &new_style, NULL);
+
+  if (new_style)
+    {
+      cairo_surface_t *surface;
+      cairo_t         *cr;
+
+      cairo_set_operator (context, CAIRO_OPERATOR_SOURCE);
+      surface = cairo_surface_create_similar (cairo_get_target (context),
+                                              CAIRO_CONTENT_COLOR_ALPHA,
+                                               gtk_widget_get_allocated_width (tooltip->window),
+                                               gtk_widget_get_allocated_height (tooltip->window));
+      cr = cairo_create (surface);
+      fill_background (tooltip->window, cr);
+      cairo_destroy (cr);
+
+      cairo_set_source_surface (context, surface, 0, 0);
+      cairo_paint (context);
+      cairo_surface_destroy (surface);
+
+      update_shape (tooltip);
+    }
+  else
+    {
+      gtk_paint_flat_box (gtk_widget_get_style (tooltip->window),
+                           context,
+                          GTK_STATE_NORMAL,
+                          GTK_SHADOW_OUT,
+                          tooltip->window,
+                          "tooltip",
+                          0, 0,
+                           gtk_widget_get_allocated_width (tooltip->window),
+                           gtk_widget_get_allocated_height (tooltip->window));
+    }
 
   return FALSE;
 }
diff -up gtk+-2.91.3/gtk/gtkwidget.c.fresh-tooltips gtk+-2.91.3/gtk/gtkwidget.c
--- gtk+-2.91.3/gtk/gtkwidget.c.fresh-tooltips	2010-11-01 09:17:21.000000000 -0400
+++ gtk+-2.91.3/gtk/gtkwidget.c	2010-11-01 14:11:38.921410003 -0400
@@ -3190,6 +3190,14 @@ gtk_widget_class_init (GtkWidgetClass *k
                                                              1, G_MAXINT, 16,
                                                              GTK_PARAM_READABLE));
 
+  gtk_widget_class_install_style_property (klass,
+                                           g_param_spec_boolean ("new-tooltip-style",
+                                                                 NULL,
+                                                                 NULL,
+                                                                 FALSE,
+                                                                 GTK_PARAM_READABLE));
+
+
   g_type_class_add_private (klass, sizeof (GtkWidgetPrivate));
 }