[mutter] clutter/stage-view: Add notify_ready()

[Marge Bot <marge-bot src gnome org>]

commit 88b06e39f4ac0122d3b25556f519fcada75c46b8
Author: Jonas Ådahl <jadahl gmail com>
Date:   Sat Oct 10 00:37:05 2020 +0200

    clutter/stage-view: Add notify_ready()
    
    Just as with the frame clock, add an API to communicate that a frame did
    not result in a presentation. This can't happen yet but will when we
    emulate atomic cursor plane changes using legacy drmMode API.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1488>

 clutter/clutter/clutter-stage-view-private.h | 2 ++
 clutter/clutter/clutter-stage-view.c         | 9 +++++++++
 2 files changed, 11 insertions(+)
---
diff --git a/clutter/clutter/clutter-stage-view-private.h b/clutter/clutter/clutter-stage-view-private.h
index deb56a1de8..feee44e9e5 100644
--- a/clutter/clutter/clutter-stage-view-private.h
+++ b/clutter/clutter/clutter-stage-view-private.h
@@ -68,4 +68,6 @@ void clutter_stage_view_schedule_update (ClutterStageView *view);
 void clutter_stage_view_notify_presented (ClutterStageView *view,
                                           ClutterFrameInfo *frame_info);
 
+void clutter_stage_view_notify_ready (ClutterStageView *view);
+
 #endif /* __CLUTTER_STAGE_VIEW_PRIVATE_H__ */
diff --git a/clutter/clutter/clutter-stage-view.c b/clutter/clutter/clutter-stage-view.c
index 81662de061..66d052ebe7 100644
--- a/clutter/clutter/clutter-stage-view.c
+++ b/clutter/clutter/clutter-stage-view.c
@@ -1134,6 +1134,15 @@ clutter_stage_view_notify_presented (ClutterStageView *view,
   clutter_frame_clock_notify_presented (priv->frame_clock, frame_info);
 }
 
+void
+clutter_stage_view_notify_ready (ClutterStageView *view)
+{
+  ClutterStageViewPrivate *priv =
+    clutter_stage_view_get_instance_private (view);
+
+  clutter_frame_clock_notify_ready (priv->frame_clock);
+}
+
 static void
 sanity_check_framebuffer (ClutterStageView *view)
 {