[gtk+] gdk: Do final copy with OPERATOR_SOURCE in end_implicit_paint

[Benjamin Otte <otte src gnome org>]

commit fc170551b6ffb57d9be6386a5d4d526bdca5bc68
Author: Benjamin Otte <otte redhat com>
Date:   Fri Aug 13 20:46:12 2010 +0200

    gdk: Do final copy with OPERATOR_SOURCE in end_implicit_paint
    
    For windows with alpha channel, the previous contents would otherwise
    not be erased. Visible for example in the status icon code.
    
    Thanks to Thomas Wood for noticing.

 gdk/gdkwindow.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 3201184..e8e3723 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -2833,6 +2833,7 @@ gdk_window_end_implicit_paint (GdkWindow *window)
       cr = gdk_cairo_create (private->impl);
       gdk_cairo_set_source_pixmap (cr, paint->pixmap,
                                    paint->x_offset, paint->y_offset);
+      cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
       gdk_cairo_region (cr, paint->region);
       cairo_fill (cr);
       cairo_destroy (cr);