cc: Emulate BeginFrame in OutputSurfaces that don't support it natively

cc/trees/thread_proxy.h

 // Copyright 2011 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_TREES_THREAD_PROXY_H_
 #define CC_TREES_THREAD_PROXY_H_
 
+#include <string>
+
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time.h"
 #include "cc/animation/animation_events.h"
 #include "cc/base/completion_event.h"
 #include "cc/resources/resource_update_controller.h"
 #include "cc/scheduler/scheduler.h"
-#include "cc/scheduler/vsync_time_source.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "cc/trees/proxy.h"
 
 namespace cc {
 
 class ContextProvider;
 class InputHandlerClient;
 class LayerTreeHost;
 class ResourceUpdateQueue;
 class Scheduler;
 class ScopedThreadProxy;
 class Thread;
 
 class ThreadProxy : public Proxy,
                     LayerTreeHostImplClient,
                     SchedulerClient,
-                    ResourceUpdateControllerClient,
-                    VSyncProvider {
+                    ResourceUpdateControllerClient {
  public:
   static scoped_ptr<Proxy> Create(LayerTreeHost* layer_tree_host,
                                   scoped_ptr<Thread> impl_thread);
 
   virtual ~ThreadProxy();
 
   // Proxy implementation
   virtual bool CompositeAndReadback(void* pixels, gfx::Rect rect) OVERRIDE;
   virtual void FinishAllRendering() OVERRIDE;
   virtual bool IsStarted() const OVERRIDE;
   virtual void SetLayerTreeHostClientReady() OVERRIDE;
   virtual void SetVisible(bool visible) OVERRIDE;
   virtual void CreateAndInitializeOutputSurface() OVERRIDE;
   virtual const RendererCapabilities& GetRendererCapabilities() const OVERRIDE;
   virtual void SetNeedsAnimate() OVERRIDE;
   virtual void SetNeedsCommit() OVERRIDE;
   virtual void SetNeedsRedraw(gfx::Rect damage_rect) OVERRIDE;
   virtual void SetDeferCommits(bool defer_commits) OVERRIDE;
   virtual bool CommitRequested() const OVERRIDE;
   virtual void MainThreadHasStoppedFlinging() OVERRIDE;
   virtual void Start(scoped_ptr<OutputSurface> first_output_surface) OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual size_t MaxPartialTextureUpdates() const OVERRIDE;
   virtual void AcquireLayerTextures() OVERRIDE;
   virtual void ForceSerializeOnSwapBuffers() OVERRIDE;
   virtual skia::RefPtr<SkPicture> CapturePicture() OVERRIDE;
   virtual scoped_ptr<base::Value> AsValue() const OVERRIDE;
   virtual bool CommitPendingForTesting() OVERRIDE;
+  virtual std::string SchedulerStateAsStringForTesting() OVERRIDE;
 
   // LayerTreeHostImplClient implementation
   virtual void DidTryInitializeRendererOnImplThread(
       bool success,
       scoped_refptr<ContextProvider> offscreen_context_provider) OVERRIDE;
   virtual void DidLoseOutputSurfaceOnImplThread() OVERRIDE;
   virtual void OnSwapBuffersCompleteOnImplThread() OVERRIDE;
-  virtual void OnVSyncParametersChanged(base::TimeTicks timebase,
-                                        base::TimeDelta interval) OVERRIDE;
-  virtual void BeginFrameOnImplThread(base::TimeTicks frame_time)
-      OVERRIDE;
+  virtual void BeginFrameOnImplThread(base::TimeTicks frame_time) OVERRIDE;
   virtual void OnCanDrawStateChanged(bool can_draw) OVERRIDE;
   virtual void OnHasPendingTreeStateChanged(bool has_pending_tree) OVERRIDE;
   virtual void SetNeedsRedrawOnImplThread() OVERRIDE;
   virtual void SetNeedsRedrawRectOnImplThread(gfx::Rect dirty_rect) OVERRIDE;
   virtual void DidInitializeVisibleTileOnImplThread() OVERRIDE;
   virtual void SetNeedsCommitOnImplThread() OVERRIDE;
   virtual void PostAnimationEventsToMainThreadOnImplThread(
       scoped_ptr<AnimationEventsVector> queue,
       base::Time wall_clock_time) OVERRIDE;
   virtual bool ReduceContentsTextureMemoryOnImplThread(size_t limit_bytes,
                                                        int priority_cutoff)
       OVERRIDE;
   virtual void ReduceWastedContentsTextureMemoryOnImplThread() OVERRIDE;
   virtual void SendManagedMemoryStats() OVERRIDE;
   virtual bool IsInsideDraw() OVERRIDE;
   virtual void RenewTreePriority() OVERRIDE;
   virtual void RequestScrollbarAnimationOnImplThread(base::TimeDelta delay)
       OVERRIDE;
   virtual void DidActivatePendingTree() OVERRIDE;
 
   // SchedulerClient implementation
+  virtual void SetNeedsBeginFrameOnImplThread(bool enable) OVERRIDE;
   virtual void ScheduledActionSendBeginFrameToMainThread() OVERRIDE;
   virtual ScheduledActionDrawAndSwapResult
       ScheduledActionDrawAndSwapIfPossible() OVERRIDE;
   virtual ScheduledActionDrawAndSwapResult ScheduledActionDrawAndSwapForced()
       OVERRIDE;
   virtual void ScheduledActionCommit() OVERRIDE;
   virtual void ScheduledActionCheckForCompletedTileUploads() OVERRIDE;
   virtual void ScheduledActionActivatePendingTreeIfNeeded() OVERRIDE;
   virtual void ScheduledActionBeginOutputSurfaceCreation() OVERRIDE;
   virtual void ScheduledActionAcquireLayerTexturesForMainThread() OVERRIDE;
   virtual void DidAnticipatedDrawTimeChange(base::TimeTicks time) OVERRIDE;
 
   // ResourceUpdateControllerClient implementation
   virtual void ReadyToFinalizeTextureUpdates() OVERRIDE;
 
-  // VSyncProvider implementation
-  virtual void RequestVSyncNotification(VSyncClient* client) OVERRIDE;
-
-  int MaxFramesPendingForTesting() const {
-    return scheduler_on_impl_thread_->MaxFramesPending();
-  }
-
-  int NumFramesPendingForTesting() const {
-    return scheduler_on_impl_thread_->NumFramesPendingForTesting();
-  }
-
  private:
   ThreadProxy(LayerTreeHost* layer_tree_host, scoped_ptr<Thread> impl_thread);
 
   struct BeginFrameAndCommitState {
     BeginFrameAndCommitState();
     ~BeginFrameAndCommitState();
 
     base::TimeTicks monotonic_frame_begin_time;
     scoped_ptr<ScrollAndScaleSet> scroll_info;
     size_t memory_allocation_limit_bytes;
   };
 
   // Called on main thread.
   void BeginFrameOnMainThread(
       scoped_ptr<BeginFrameAndCommitState> begin_frame_state);
   void DidCommitAndDrawFrame();
   void DidCompleteSwapBuffers();
   void SetAnimationEvents(scoped_ptr<AnimationEventsVector> queue,
                           base::Time wall_clock_time);
   void DoCreateAndInitializeOutputSurface();
   // |capabilities| is set only when |success| is true.
   void OnOutputSurfaceInitializeAttempted(
       bool success,
       const RendererCapabilities& capabilities);
 
   // Called on impl thread.
-  struct ReadbackRequest {
-    CompletionEvent completion;
-    bool success;
-    void* pixels;
-    gfx::Rect rect;
-  };
-  struct CommitPendingRequest {
-    CompletionEvent completion;
-    bool commit_pending;
-  };
+  struct ReadbackRequest;
+  struct CommitPendingRequest;
+  struct SchedulerStateRequest;
+
   void ForceCommitOnImplThread(CompletionEvent* completion);
   void StartCommitOnImplThread(
       CompletionEvent* completion,
       ResourceUpdateQueue* queue,
       scoped_refptr<cc::ContextProvider> offscreen_context_provider);
   void BeginFrameAbortedByMainThreadOnImplThread();
   void RequestReadbackOnImplThread(ReadbackRequest* request);
   void FinishAllRenderingOnImplThread(CompletionEvent* completion);
   void InitializeImplOnImplThread(CompletionEvent* completion);
   void SetLayerTreeHostClientReadyOnImplThread();
   void SetVisibleOnImplThread(CompletionEvent* completion, bool visible);
   void HasInitializedOutputSurfaceOnImplThread(
       CompletionEvent* completion,
       bool* has_initialized_output_surface);
   void InitializeOutputSurfaceOnImplThread(
       CompletionEvent* completion,
       scoped_ptr<OutputSurface> output_surface,
       scoped_refptr<ContextProvider> offscreen_context_provider,
       bool* success,
       RendererCapabilities* capabilities);
   void FinishGLOnImplThread(CompletionEvent* completion);
   void LayerTreeHostClosedOnImplThread(CompletionEvent* completion);
   void AcquireLayerTexturesForMainThreadOnImplThread(
       CompletionEvent* completion);
   ScheduledActionDrawAndSwapResult ScheduledActionDrawAndSwapInternal(
       bool forced_draw);
   void ForceSerializeOnSwapBuffersOnImplThread(CompletionEvent* completion);
   void CheckOutputSurfaceStatusOnImplThread();
   void CommitPendingOnImplThreadForTesting(CommitPendingRequest* request);
+  void SchedulerStateAsStringOnImplThreadForTesting(
+      SchedulerStateRequest* request);
   void CapturePictureOnImplThread(CompletionEvent* completion,
                                   skia::RefPtr<SkPicture>* picture);
   void AsValueOnImplThread(CompletionEvent* completion,
                            base::DictionaryValue* state) const;
   void RenewTreePriorityOnImplThread();
   void DidSwapUseIncompleteTileOnImplThread();
   void StartScrollbarAnimationOnImplThread();
   void MainThreadHasStoppedFlingingOnImplThread();
 
   // Accessed on main thread only.
@@ skipping 48 matching lines @@
   scoped_ptr<ResourceUpdateController>
       current_resource_update_controller_on_impl_thread_;
 
   // Set when the next draw should post DidCommitAndDrawFrame to the main
   // thread.
   bool next_frame_is_newly_committed_frame_on_impl_thread_;
 
   bool throttle_frame_production_;
   bool begin_frame_scheduling_enabled_;
   bool using_synchronous_renderer_compositor_;
-  VSyncClient* vsync_client_;
 
   bool inside_draw_;
 
   bool defer_commits_;
   scoped_ptr<BeginFrameAndCommitState> pending_deferred_commit_;
 
   base::TimeTicks smoothness_takes_priority_expiration_time_;
   bool renew_tree_priority_on_impl_thread_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadProxy);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_THREAD_PROXY_H_