From 678dc3243f5ae97455a94bea432eb6abbf50cc39 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20=C3=85dahl?= <jadahl@gmail.com>
Date: Thu, 7 Jul 2022 09:23:41 +0200
Subject: [PATCH] clutter/stage-view: Allow stage view to allocate frame

This will be used to allow the native backend to allocate a KMS update
that'll be used for one frame.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2855>
---
 clutter/clutter/clutter-stage-view.c | 14 ++++++++++++++
 clutter/clutter/clutter-stage-view.h |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/clutter/clutter/clutter-stage-view.c b/clutter/clutter/clutter-stage-view.c
index 0bedb67f7..f489988bb 100644
--- a/clutter/clutter/clutter-stage-view.c
+++ b/clutter/clutter/clutter-stage-view.c
@@ -1278,9 +1278,23 @@ handle_frame_clock_frame (ClutterFrameClock *frame_clock,
   return clutter_frame_get_result (frame);
 }
 
+static ClutterFrame *
+handle_frame_clock_new_frame (ClutterFrameClock *frame_clock,
+                              gpointer           user_data)
+{
+  ClutterStageView *view = CLUTTER_STAGE_VIEW (user_data);
+  ClutterStageViewClass *view_class = CLUTTER_STAGE_VIEW_GET_CLASS (view);
+
+  if (view_class->new_frame)
+    return view_class->new_frame (view);
+  else
+    return NULL;
+}
+
 static const ClutterFrameListenerIface frame_clock_listener_iface = {
   .before_frame = handle_frame_clock_before_frame,
   .frame = handle_frame_clock_frame,
+  .new_frame = handle_frame_clock_new_frame,
 };
 
 void
diff --git a/clutter/clutter/clutter-stage-view.h b/clutter/clutter/clutter-stage-view.h
index 46ee87b3d..a2c5aad15 100644
--- a/clutter/clutter/clutter-stage-view.h
+++ b/clutter/clutter/clutter-stage-view.h
@@ -50,6 +50,8 @@ struct _ClutterStageViewClass
                                        int                          dst_width,
                                        int                          dst_height,
                                        cairo_rectangle_int_t       *dst_rect);
+
+  ClutterFrame * (* new_frame) (ClutterStageView *view);
 };
 
 CLUTTER_EXPORT