cc: Split animating and drawing into separate actions

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"
@@ skipping 64 matching lines @@
   virtual void DidLoseOutputSurfaceOnImplThread() OVERRIDE;
   virtual void CommitVSyncParameters(base::TimeTicks timebase,
                                      base::TimeDelta interval) OVERRIDE;
   virtual void SetEstimatedParentDrawTime(base::TimeDelta draw_time) OVERRIDE;
   virtual void BeginFrame(const BeginFrameArgs& args) OVERRIDE;
   virtual void SetMaxSwapsPendingOnImplThread(int max) OVERRIDE;
   virtual void DidSwapBuffersOnImplThread() OVERRIDE;
   virtual void DidSwapBuffersCompleteOnImplThread() OVERRIDE;
   virtual void OnCanDrawStateChanged(bool can_draw) OVERRIDE;
   virtual void NotifyReadyToActivate() OVERRIDE;
-  // Please call these 2 functions through
-  // LayerTreeHostImpl's SetNeedsRedraw() and SetNeedsRedrawRect().
+  // Please call these 3 functions through
+  // LayerTreeHostImpl's SetNeedsRedraw(), SetNeedsRedrawRect() and
+  // SetNeedsAnimate().
   virtual void SetNeedsRedrawOnImplThread() OVERRIDE;
   virtual void SetNeedsRedrawRectOnImplThread(const gfx::Rect& dirty_rect)
       OVERRIDE;
+  virtual void SetNeedsAnimateOnImplThread() OVERRIDE;
   virtual void SetNeedsManageTilesOnImplThread() OVERRIDE;
   virtual void DidInitializeVisibleTileOnImplThread() OVERRIDE;
   virtual void SetNeedsCommitOnImplThread() OVERRIDE;
   virtual void PostAnimationEventsToMainThreadOnImplThread(
       scoped_ptr<AnimationEventsVector> queue) OVERRIDE;
   virtual bool ReduceContentsTextureMemoryOnImplThread(size_t limit_bytes,
                                                        int priority_cutoff)
       OVERRIDE;
   virtual void SendManagedMemoryStats() OVERRIDE;
   virtual bool IsInsideDraw() OVERRIDE;
   virtual void RenewTreePriority() OVERRIDE;
   virtual void RequestScrollbarAnimationOnImplThread(base::TimeDelta delay)
       OVERRIDE;
   virtual void DidActivatePendingTree() OVERRIDE;
   virtual void DidManageTiles() OVERRIDE;
 
   // SchedulerClient implementation
   virtual void SetNeedsBeginFrame(bool enable) OVERRIDE;
   virtual void WillBeginImplFrame(const BeginFrameArgs& args) OVERRIDE;
   virtual void ScheduledActionSendBeginMainFrame() OVERRIDE;
   virtual DrawSwapReadbackResult ScheduledActionDrawAndSwapIfPossible()
       OVERRIDE;
   virtual DrawSwapReadbackResult ScheduledActionDrawAndSwapForced() OVERRIDE;
   virtual DrawSwapReadbackResult ScheduledActionDrawAndReadback() OVERRIDE;
+  virtual void ScheduledActionAnimate() OVERRIDE;
   virtual void ScheduledActionCommit() OVERRIDE;
   virtual void ScheduledActionUpdateVisibleTiles() OVERRIDE;
   virtual void ScheduledActionActivatePendingTree() OVERRIDE;
   virtual void ScheduledActionBeginOutputSurfaceCreation() OVERRIDE;
   virtual void ScheduledActionManageTiles() OVERRIDE;
   virtual void DidAnticipatedDrawTimeChange(base::TimeTicks time) OVERRIDE;
   virtual base::TimeDelta DrawDurationEstimate() OVERRIDE;
   virtual base::TimeDelta BeginMainFrameToCommitDurationEstimate() OVERRIDE;
   virtual base::TimeDelta CommitToActivateDurationEstimate() OVERRIDE;
   virtual void DidBeginImplFrameDeadline() OVERRIDE;
@@ skipping 152 matching lines @@
     // Set when the next draw should post DidCommitAndDrawFrame to the main
     // thread.
     bool next_frame_is_newly_committed_frame;
 
     bool inside_draw;
 
     bool input_throttled_until_commit;
 
     // Set when we freeze animations to avoid checkerboarding.
     bool animations_frozen_until_next_draw;
-    base::TimeTicks animation_freeze_time;
+    base::TimeTicks animation_time;
+
+    // Whether a commit has been completed since the last time animations were
+    // ticked. If this happens, we need to animate again.
+    bool did_commit_after_animating;
 
     base::TimeTicks smoothness_takes_priority_expiration_time;
     bool renew_tree_priority_pending;
 
     ProxyTimingHistory timing_history;
 
     scoped_ptr<LayerTreeHostImpl> layer_tree_host_impl;
     base::WeakPtrFactory<ThreadProxy> weak_factory;
   };
   // Use accessors instead of this variable directly.
   CompositorThreadOnly compositor_thread_vars_unsafe_;
   CompositorThreadOnly& impl();
   const CompositorThreadOnly& impl() const;
 
   base::WeakPtr<ThreadProxy> main_thread_weak_ptr_;
   base::WeakPtr<ThreadProxy> impl_thread_weak_ptr_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadProxy);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_THREAD_PROXY_H_