[gimp] app: disable double buffering on all offscreen widgets

[Michael Natterer <mitch src gnome org>]

commit 3a1c319c916c09f95be0dd0da2b3ca8308849b1e
Author: Michael Natterer <mitch gimp org>
Date:   Wed May 26 11:47:52 2010 +0200

    app: disable double buffering on all offscreen widgets
    
    They are rendered only after being completely drawn anyway, so there
    is no use in wasting an additional buffer for them.

 app/widgets/gimpoverlaybox.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/app/widgets/gimpoverlaybox.c b/app/widgets/gimpoverlaybox.c
index ab68d04..98353a9 100644
--- a/app/widgets/gimpoverlaybox.c
+++ b/app/widgets/gimpoverlaybox.c
@@ -355,6 +355,8 @@ gimp_overlay_box_add_child (GimpOverlayBox *box,
   g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
   g_return_if_fail (GTK_IS_WIDGET (widget));
 
+  gtk_widget_set_double_buffered (widget, FALSE);
+
   child = gimp_overlay_child_new (box, widget, xalign, yalign, 0.0, 0.7);
 
   box->children = g_list_append (box->children, child);