From 6c7689506f8b6c71522e6c8a25a2b4523641592c Mon Sep 17 00:00:00 2001
From: Alexander Larsson <alexl@redhat.com>
Date: Thu, 25 Apr 2013 14:00:18 +0200
Subject: [PATCH] GtkWindow: Move cairo_save/restore from marshaller

We do the save/restore when emitting ::draw rather than in a custom
marshaller, as this saves an extra stack frame, which is helpfull now
that we do painting fully recursive. This is also likely to save a few
cycles.
---
 gtk/gtkwidget.c | 70 ++++++-------------------------------------------
 1 file changed, 8 insertions(+), 62 deletions(-)

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 2001718f3b..737d5b2f29 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -956,64 +956,6 @@ child_property_notify_dispatcher (GObject     *object,
   GTK_WIDGET_GET_CLASS (object)->dispatch_child_properties_changed (GTK_WIDGET (object), n_pspecs, pspecs);
 }
 
-/* We guard against the draw signal callbacks modifying the state of the
- * cairo context by surounding it with save/restore.
- * Maybe we should also cairo_new_path() just to be sure?
- */
-static void
-gtk_widget_draw_marshaller (GClosure     *closure,
-                            GValue       *return_value,
-                            guint         n_param_values,
-                            const GValue *param_values,
-                            gpointer      invocation_hint,
-                            gpointer      marshal_data)
-{
-  cairo_t *cr = g_value_get_boxed (&param_values[1]);
-
-  cairo_save (cr);
-
-  _gtk_marshal_BOOLEAN__BOXED (closure,
-                               return_value,
-                               n_param_values,
-                               param_values,
-                               invocation_hint,
-                               marshal_data);
-
-
-  cairo_restore (cr);
-}
-
-static void
-gtk_widget_draw_marshallerv (GClosure     *closure,
-			     GValue       *return_value,
-			     gpointer      instance,
-			     va_list       args,
-			     gpointer      marshal_data,
-			     int           n_params,
-			     GType        *param_types)
-{
-  cairo_t *cr;
-  va_list args_copy;
-
-  G_VA_COPY (args_copy, args);
-  cr = va_arg (args_copy, gpointer);
-
-  cairo_save (cr);
-
-  _gtk_marshal_BOOLEAN__BOXEDv (closure,
-				return_value,
-				instance,
-				args,
-				marshal_data,
-				n_params,
-				param_types);
-
-
-  cairo_restore (cr);
-
-  va_end (args_copy);
-}
-
 static void
 gtk_widget_class_init (GtkWidgetClass *klass)
 {
@@ -1960,12 +1902,12 @@ G_GNUC_END_IGNORE_DEPRECATIONS
 		   G_TYPE_FROM_CLASS (gobject_class),
 		   G_SIGNAL_RUN_LAST,
 		   G_STRUCT_OFFSET (GtkWidgetClass, draw),
-                   _gtk_boolean_handled_accumulator, NULL,
-                   gtk_widget_draw_marshaller,
+		   _gtk_boolean_handled_accumulator, NULL,
+		  _gtk_marshal_BOOLEAN__BOXED,
 		   G_TYPE_BOOLEAN, 1,
-		   CAIRO_GOBJECT_TYPE_CONTEXT);
+		   CAIRO_GOBJECT_TYPE_CONTEXT | G_SIGNAL_TYPE_STATIC_SCOPE);
   g_signal_set_va_marshaller (widget_signals[DRAW], G_TYPE_FROM_CLASS (klass),
-                              gtk_widget_draw_marshallerv);
+			      _gtk_marshal_BOOLEAN__BOXEDv);
 
   /**
    * GtkWidget::mnemonic-activate:
@@ -6391,10 +6333,14 @@ _gtk_widget_draw_internal (GtkWidget *widget,
     {
       gboolean result;
 
+      cairo_save (cr);
+
       g_signal_emit (widget, widget_signals[DRAW],
                      0, cr,
                      &result);
 
+      cairo_restore (cr);
+
 #ifdef G_ENABLE_DEBUG
       if (G_UNLIKELY (gtk_get_debug_flags () & GTK_DEBUG_BASELINES))
 	{
-- 
2.30.2