Gdk: fix wrong user_data handling in resize_cairo_surface()

Instead of destroying the surface in the backend if this is
unable to resize, let the core code do it, and do it properly.

Based on a patch by Benjamin Otte.

https://bugzilla.gnome.org/show_bug.cgi?id=725172

1 files changed, 8 insertions, 4 deletions

diff --git a/gdk/gdkwindowimpl.h b/gdk/gdkwindowimpl.h
index ab04985c98..ed7d4c55c0 100644
--- a/gdk/gdkwindowimpl.h
+++ b/gdk/gdkwindowimpl.h
@@ -158,10 +158,14 @@ struct _GdkWindowImplClass
   */
   void         (*destroy_foreign)       (GdkWindow       *window);
 
-  cairo_surface_t * (* resize_cairo_surface) (GdkWindow       *window,
-                                              cairo_surface_t *surface,
-                                              gint             width,
-                                              gint             height);
+  /* Resizes @surface to a new size. If successful, return %TRUE.
+   * If the backend cannot resize surfaces, return %FALSE and a new
+   * surface will be created instead.
+   */
+  gboolean     (* resize_cairo_surface) (GdkWindow       *window,
+                                         cairo_surface_t *surface,
+                                         gint             width,
+                                         gint             height);
 
   /* optional */
   gboolean     (* beep)                 (GdkWindow       *window);