Implement service-side surface synchronization

cc/surfaces/surface_factory.h

 // Copyright 2014 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_SURFACE_FACTORY_H_
 #define CC_SURFACES_SURFACE_FACTORY_H_
 
 #include <memory>
 #include <set>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "cc/output/compositor_frame.h"
+#include "cc/surfaces/pending_frame_observer.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_resource_holder.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "cc/surfaces/surfaces_export.h"
 
 namespace cc {
 class CopyOutputRequest;
 class Surface;
 class SurfaceFactoryClient;
 class SurfaceManager;
 
 // This class is used for creating surfaces and submitting compositor frames to
 // them. Surfaces are created lazily each time SubmitCompositorFrame is
 // called with a local frame id that is different from the last call. Only one
 // surface is owned by this class at a time, and upon constructing a new surface
 // the old one will be destructed. Resources submitted to surfaces created by a
 // particular factory will be returned to that factory's client when they are no
 // longer being used. This is the only class most users of surfaces will need to
 // directly interact with.
-class CC_SURFACES_EXPORT SurfaceFactory {
+class CC_SURFACES_EXPORT SurfaceFactory : public PendingFrameObserver {
  public:
   using DrawCallback = base::Callback<void()>;
 
   SurfaceFactory(const FrameSinkId& frame_sink_id,
                  SurfaceManager* manager,
                  SurfaceFactoryClient* client);
-  ~SurfaceFactory();
+  ~SurfaceFactory() override;
 
   const FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
 
   // Destroys the current surface. You need to call this method before the
   // factory is destroyed, or when you would like to get rid of the surface as
   // soon as possible (otherwise, the next time you call SubmitCompositorFrame
   // the old surface will be dealt with).
   void EvictSurface();
 
   // Destroys and disowns the current surface, and resets all resource
@@ skipping 18 matching lines @@
   void WillDrawSurface(const LocalSurfaceId& id, const gfx::Rect& damage_rect);
 
   SurfaceFactoryClient* client() { return client_; }
 
   void ReceiveFromChild(const TransferableResourceArray& resources);
   void RefResources(const TransferableResourceArray& resources);
   void UnrefResources(const ReturnedResourceArray& resources);
 
   SurfaceManager* manager() { return manager_; }
 
+  Surface* current_surface_for_testing() { return current_surface_.get(); }
+
   // This can be set to false if resources from this SurfaceFactory don't need
   // to have sync points set on them when returned from the Display, for
   // example if the Display shares a context with the creator.
   bool needs_sync_points() const { return needs_sync_points_; }
   void set_needs_sync_points(bool needs) { needs_sync_points_ = needs; }
 
   // SurfaceFactory's owner can call this when it finds out that SurfaceManager
   // is no longer alive during destruction.
   void DidDestroySurfaceManager() { manager_ = nullptr; }
 
  private:
+  // PendingFrameObserver implementation.
+  void OnSurfaceActivated(Surface* pending_surface) override;
+  void OnSurfaceDependenciesChanged(
+      Surface* pending_surface,
+      const SurfaceDependencies& added_dependencies,
+      const SurfaceDependencies& removed_dependencies) override;
+  void OnSurfaceDiscarded(Surface* pending_surface) override;
+
   std::unique_ptr<Surface> Create(const LocalSurfaceId& local_surface_id);
   void Destroy(std::unique_ptr<Surface> surface);
 
   const FrameSinkId frame_sink_id_;
   SurfaceManager* manager_;
   SurfaceFactoryClient* client_;
   SurfaceResourceHolder holder_;
   bool needs_sync_points_;
   std::unique_ptr<Surface> current_surface_;
   base::WeakPtrFactory<SurfaceFactory> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceFactory);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_SURFACE_FACTORY_H_