Unified BeginFrame scheduling

cc/output/output_surface.h

 // Copyright 2012 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_OUTPUT_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_OUTPUT_SURFACE_H_
 
 #include <deque>
 
 #include "base/basictypes.h"
@@ skipping 13 matching lines @@
 namespace gfx {
 class Rect;
 class Size;
 class Transform;
 }
 
 namespace cc {
 
 class CompositorFrame;
 class CompositorFrameAck;
+class OutputSurfaceClient;
+struct BeginFrameArgs;
 struct ManagedMemoryPolicy;
-class OutputSurfaceClient;
 
 // Represents the output surface for a compositor. The compositor owns
 // and manages its destruction. Its lifetime is:
 //   1. Created on the main thread by the LayerTreeHost through its client.
 //   2. Passed to the compositor thread and bound to a client via BindToClient.
 //      From here on, it will only be used on the compositor thread.
 //   3. If the 3D context is lost, then the compositor will delete the output
 //      surface (on the compositor thread) and go back to step 1.
 class CC_EXPORT OutputSurface {
  public:
@@ skipping 73 matching lines @@
 
   // Notifies frame-rate smoothness preference. If true, all non-critical
   // processing should be stopped, or lowered in priority.
   virtual void UpdateSmoothnessTakesPriority(bool prefer_smoothness) {}
 
   // Requests a BeginFrame notification from the output surface. The
   // notification will be delivered by calling
   // OutputSurfaceClient::BeginFrame until the callback is disabled.
   virtual void SetNeedsBeginFrame(bool enable) {}
 
-  bool HasClient() { return !!client_; }
+  bool HasClient() const { return !!client_; }
 
   // Returns an estimate of the current GPU latency. When only a software
   // device is present, returns 0.
   base::TimeDelta GpuLatencyEstimate();
 
   // Get the class capable of informing cc of hardware overlay capability.
   OverlayCandidateValidator* overlay_candidate_validator() const {
     return overlay_candidate_validator_.get();
   }
 
+  void BeginFrame(const BeginFrameArgs& args) const;
+
+  base::WeakPtr<OutputSurface> GetWeakPtr() {
+    return weak_ptr_factory_.GetWeakPtr();
+  }
+
  protected:
   OutputSurfaceClient* client_;
 
   // Synchronously initialize context3d and enter hardware mode.
   // This can only supported in threaded compositing mode.
   bool InitializeAndSetContext3d(
       scoped_refptr<ContextProvider> context_provider);
   void ReleaseGL();
 
   void PostSwapBuffersComplete();
@@ skipping 33 matching lines @@
   RollingTimeDeltaHistory gpu_latency_history_;
 
   base::WeakPtrFactory<OutputSurface> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_