Ref count layer animation controllers.

cc/layer_tree_host_impl.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_LAYER_TREE_HOST_IMPL_H_
 #define CC_LAYER_TREE_HOST_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "cc/animation_events.h"
+#include "cc/animation_registrar.h"
 #include "cc/cc_export.h"
 #include "cc/input_handler.h"
 #include "cc/output_surface_client.h"
 #include "cc/render_pass.h"
 #include "cc/render_pass_sink.h"
 #include "cc/renderer.h"
 #include "cc/tile_manager.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/rect.h"
 
@@ skipping 219 matching lines @@
     scoped_ptr<ScrollAndScaleSet> processScrollDeltas();
     gfx::Transform implTransform() const;
 
     void startPageScaleAnimation(gfx::Vector2d targetOffset, bool useAnchor, float scale, base::TimeDelta duration);
 
     SkColor backgroundColor() const { return m_backgroundColor; }
     void setBackgroundColor(SkColor color) { m_backgroundColor = color; }
 
     bool hasTransparentBackground() const { return m_hasTransparentBackground; }
     void setHasTransparentBackground(bool transparent) { m_hasTransparentBackground = transparent; }
-
-    bool needsAnimateLayers() const { return m_needsAnimateLayers; }
-    void setNeedsAnimateLayers() { m_needsAnimateLayers = true; }
+    bool needsAnimateLayers() const { return !m_animationRegistrar->active_animation_controllers().empty(); }
 
     bool needsUpdateDrawProperties() const { return m_needsUpdateDrawProperties; }
     void setNeedsUpdateDrawProperties() { m_needsUpdateDrawProperties = true; }
 
     void setNeedsRedraw();
 
     void renderingStats(RenderingStats*) const;
 
     void sendManagedMemoryStats(
        size_t memoryVisibleBytes,
        size_t memoryVisibleAndNearbyBytes,
        size_t memoryUseBytes);
 
     FrameRateCounter* fpsCounter() const { return m_fpsCounter.get(); }
     DebugRectHistory* debugRectHistory() const { return m_debugRectHistory.get(); }
     ResourceProvider* resourceProvider() const { return m_resourceProvider.get(); }
 
     Proxy* proxy() const { return m_proxy; }
 
+    AnimationRegistrar* animationRegistrar() const { return m_animationRegistrar.get(); }
+
     void setDebugState(const LayerTreeDebugState& debugState) { m_debugState = debugState; }
     const LayerTreeDebugState& debugState() const { return m_debugState; }
 
     class CC_EXPORT CullRenderPassesWithCachedTextures {
     public:
         bool shouldRemoveRenderPass(const RenderPassDrawQuad&, const FrameData&) const;
 
         // Iterates from the root first, in order to remove the surfaces closest
         // to the root with cached textures, and all surfaces that draw into
         // them.
@@ skipping 24 matching lines @@
 
 protected:
     LayerTreeHostImpl(const LayerTreeSettings&, LayerTreeHostImplClient*, Proxy*);
 
     // Virtual for testing.
     virtual void animateLayers(base::TimeTicks monotonicTime, base::Time wallClockTime);
 
     // Virtual for testing.
     virtual base::TimeDelta lowFrequencyAnimationInterval() const;
 
+    const AnimationRegistrar::AnimationControllerMap& activeAnimationControllers() const { return m_animationRegistrar->active_animation_controllers(); }
+
     LayerTreeHostImplClient* m_client;
     Proxy* m_proxy;
 
 private:
     void animatePageScale(base::TimeTicks monotonicTime);
     void animateScrollbars(base::TimeTicks monotonicTime);
 
     void updateDrawProperties();
 
     void computeDoubleTapZoomDeltas(ScrollAndScaleSet* scrollInfo);
@@ skipping 35 matching lines @@
     gfx::Size m_layoutViewportSize;
     gfx::Size m_deviceViewportSize;
     float m_deviceScaleFactor;
     bool m_visible;
     bool m_contentsTexturesPurged;
     ManagedMemoryPolicy m_managedMemoryPolicy;
 
     SkColor m_backgroundColor;
     bool m_hasTransparentBackground;
 
-    // If this is true, it is necessary to traverse the layer tree ticking the animators.
-    bool m_needsAnimateLayers;
     bool m_needsUpdateDrawProperties;
     bool m_pinchGestureActive;
     gfx::Point m_previousPinchAnchor;
 
     scoped_ptr<PageScaleAnimation> m_pageScaleAnimation;
 
     // This is used for ticking animations slowly when hidden.
     scoped_ptr<LayerTreeHostImplTimeSourceAdapter> m_timeSourceClientAdapter;
 
     // List of visible layers for the most recently prepared frame. Used for
     // rendering and input event hit testing.
     LayerList m_renderSurfaceLayerList;
 
     PinchZoomViewport m_pinchZoomViewport;
 
     scoped_ptr<FrameRateCounter> m_fpsCounter;
     scoped_ptr<DebugRectHistory> m_debugRectHistory;
 
     int64 m_numImplThreadScrolls;
     int64 m_numMainThreadScrolls;
 
     int64 m_cumulativeNumLayersDrawn;
 
     int64 m_cumulativeNumMissingTiles;
 
     size_t m_lastSentMemoryVisibleBytes;
     size_t m_lastSentMemoryVisibleAndNearbyBytes;
     size_t m_lastSentMemoryUseBytes;
 
+    scoped_ptr<AnimationRegistrar> m_animationRegistrar;
+
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_HOST_IMPL_H_