Extract non-Mojo bits of GpuCompositorFrameSink to CompositorFrameSinkSupport

cc/surfaces/compositor_frame_sink_support.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_SURFACES_COMPOSITOR_FRAME_SINK_SUPPORT_H_
+#define CC_SURFACES_COMPOSITOR_FRAME_SINK_SUPPORT_H_
+
+#include "base/memory/weak_ptr.h"
+#include "cc/output/compositor_frame.h"
+#include "cc/scheduler/begin_frame_source.h"
+#include "cc/surfaces/display.h"
+#include "cc/surfaces/display_client.h"
+#include "cc/surfaces/surface_factory.h"
+#include "cc/surfaces/surface_factory_client.h"
+#include "cc/surfaces/surfaces_export.h"
+
+namespace cc {
+
+class CompositorFrameSinkSupportClient;
+class Display;
+class SurfaceManager;
+
+class CC_SURFACES_EXPORT CompositorFrameSinkSupport
+    : public DisplayClient,
+      public SurfaceFactoryClient,
+      public BeginFrameObserver {
+ public:
+  CompositorFrameSinkSupport(CompositorFrameSinkSupportClient* client,
+                             SurfaceManager* surface_manager,
+                             const FrameSinkId& frame_sink_id,
+                             std::unique_ptr<Display> display);
+
+  ~CompositorFrameSinkSupport() override;
+
+  const FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
+
+  void SetNeedsBeginFrame(bool needs_begin_frame);
+  void SubmitCompositorFrame(const LocalFrameId& local_frame_id,
+                             CompositorFrame frame);
+  void AddChildFrameSink(const FrameSinkId& child_frame_sink_id);
+  void RemoveChildFrameSink(const FrameSinkId& child_frame_sink_id);
+
+ private:
+  void DidReceiveCompositorFrameAck();
+
+  // DisplayClient implementation.
+  void DisplayOutputSurfaceLost() override;
+  void DisplayWillDrawAndSwap(bool will_draw_and_swap,
+                              const RenderPassList& render_passes) override;
+  void DisplayDidDrawAndSwap() override;
+
+  // SurfaceFactoryClient implementation.
+  void ReturnResources(const ReturnedResourceArray& resources) override;
+  void SetBeginFrameSource(BeginFrameSource* begin_frame_source) override;
+
+  // BeginFrameObserver implementation.
+  void OnBeginFrame(const BeginFrameArgs& args) override;
+  const BeginFrameArgs& LastUsedBeginFrameArgs() const override;
+  void OnBeginFrameSourcePausedChanged(bool paused) override;
+
+  void UpdateNeedsBeginFramesInternal();
+
+  CompositorFrameSinkSupportClient* const client_;
+
+  SurfaceManager* const surface_manager_;
+
+  const FrameSinkId frame_sink_id_;
+
+  // GpuCompositorFrameSink holds a Display if it created with
+  // non-null gpu::SurfaceHandle. In the window server, the display root
+  // window's CompositorFrameSink will have a valid gpu::SurfaceHandle.
+  std::unique_ptr<Display> display_;
+
+  LocalFrameId local_frame_id_;
+  SurfaceFactory surface_factory_;
+  // Counts the number of CompositorFrames that have been submitted and have not
+  // yet received an ACK.
+  int ack_pending_count_ = 0;
+  ReturnedResourceArray surface_returned_resources_;
+
+  // The begin frame source being observered. Null if none.
+  BeginFrameSource* begin_frame_source_ = nullptr;
+
+  // The last begin frame args generated by the begin frame source.
+  BeginFrameArgs last_begin_frame_args_;
+
+  // Whether a request for begin frames has been issued.
+  bool needs_begin_frame_ = false;
+
+  // Whether or not a frame observer has been added.
+  bool added_frame_observer_ = false;
+
+  base::WeakPtrFactory<CompositorFrameSinkSupport> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(CompositorFrameSinkSupport);
+};
+
+}  // namespace cc
+
+#endif  // CC_SURFACES_COMPOSITOR_FRAME_SINK_SUPPORT_H_