widget: Improve early exit checks on queue_draw()

(1) We don't need to check for realized when we check for mapped right
    below.
(2) Empty regions don't need to be drawn.

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index c070e1411d598ff1c7b396f72f05659a5e49e3c1..14ea19567b2752eb0f3a62625176e2b153a90971 100644 (file)
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -5067,7 +5067,7 @@ gtk_widget_queue_draw_region (GtkWidget            *widget,
 
   g_return_if_fail (GTK_IS_WIDGET (widget));
 
-  if (!_gtk_widget_get_realized (widget))
+  if (cairo_region_is_empty (region))
     return;
 
   /* Just return if the widget or one of its ancestors isn't mapped */