[clutter] gdk: stage: report geometry of the underlying surface for foreign windows

[Lionel Landwerlin <llandwerlin src gnome org>]

commit 3771ef2f08054770ebc6110de14efd8fa2de3a26
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Mon Aug 31 22:55:57 2015 +0100

    gdk: stage: report geometry of the underlying surface for foreign windows
    
    When running on wayland, we might have our own subsurface
    desynchronized from the foreign GdkWindow. It is important that we
    report the size of the actually surface we're rendering to, otherwise
    the logic in ClutterStage might discard resize operation that
    resynchronize the subsurface with the stage's size.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754697

 clutter/gdk/clutter-stage-gdk.c |   19 ++++++++++++-------
 1 files changed, 12 insertions(+), 7 deletions(-)
---
diff --git a/clutter/gdk/clutter-stage-gdk.c b/clutter/gdk/clutter-stage-gdk.c
index 3ab4b1e..953c2b7 100644
--- a/clutter/gdk/clutter-stage-gdk.c
+++ b/clutter/gdk/clutter-stage-gdk.c
@@ -122,16 +122,21 @@ clutter_stage_gdk_get_geometry (ClutterStageWindow    *stage_window,
 {
   ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
 
-  if (stage_gdk->window != NULL)
+  if (!stage_gdk->foreign_window)
     {
-      geometry->width = gdk_window_get_width (stage_gdk->window);
-      geometry->height = gdk_window_get_height (stage_gdk->window);
+      if (stage_gdk->window != NULL)
+        {
+          geometry->width = gdk_window_get_width (stage_gdk->window);
+          geometry->height = gdk_window_get_height (stage_gdk->window);
+        }
+      else
+        {
+          geometry->width = 640;
+          geometry->height = 480;
+        }
     }
   else
-    {
-      geometry->width = 640;
-      geometry->height = 480;
-    }
+    clutter_stage_window_parent_iface->get_geometry (stage_window, geometry);
 }
 
 static void