Drive SVG Animations via requestAnimationFrame

Source/core/svg/animation/SMILTimeContainer.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 #include "platform/Timer.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/StringHash.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
+class AnimationClock;
+class Document;
 class SVGElement;
 class SVGSMILElement;
 class SVGSVGElement;
 
 class SMILTimeContainer : public RefCounted<SMILTimeContainer>  {
 public:
     static PassRefPtr<SMILTimeContainer> create(SVGSVGElement* owner) { return adoptRef(new SMILTimeContainer(owner)); }
     ~SMILTimeContainer();
 
     void schedule(SVGSMILElement*, SVGElement*, const QualifiedName&);
     void unschedule(SVGSMILElement*, SVGElement*, const QualifiedName&);
     void notifyIntervalsChanged();
 
     SMILTime elapsed() const;
 
     bool isPaused() const;
     bool isStarted() const;
 
     void begin();
     void pause();
     void resume();
     void setElapsed(SMILTime);
 
+    void serviceAnimations(double monotonicAnimationStartTime);
+    bool hasAnimations() const;
+
     void setDocumentOrderIndexesDirty() { m_documentOrderIndexesDirty = true; }
 
 private:
     SMILTimeContainer(SVGSVGElement* owner);
 
+    enum FrameSchedulingState {
+        // No frame scheduled.
+        Idle,
+        // Scheduled a wakeup to update the animation values.
+        SynchronizeAnimations,
+        // Scheduled a animation frame for continuous update.
+        AnimationFrame
+    };
+
     bool isTimelineRunning() const;
     void scheduleAnimationFrame(SMILTime fireTime);
-    void scheduleAnimationFrame();
     void cancelAnimationFrame();
-    void timerFired(Timer<SMILTimeContainer>*);
-    void updateAnimations(SMILTime elapsed, bool seekToTime = false);
+    void wakeupTimerFired(Timer<SMILTimeContainer>*);
+    void updateAnimationsAndScheduleFrameIfNeeded(SMILTime elapsed, bool seekToTime = false);
+    SMILTime updateAnimations(SMILTime elapsed, bool seekToTime = false);
+    void serviceOnNextFrame();
+    void scheduleWakeUp(double delayTime, FrameSchedulingState);
 
     void updateDocumentOrderIndexes();
     double lastResumeTime() const { return m_resumeTime ? m_resumeTime : m_beginTime; }
 
+    Document& document() const;
+    AnimationClock& animationClock() const;
+    double currentTime() const;
+
     double m_beginTime;
     double m_pauseTime;
     double m_resumeTime;
     double m_accumulatedActiveTime;
     double m_presetStartTime;
 
+    FrameSchedulingState m_frameSchedulingState;
     bool m_documentOrderIndexesDirty;
 
-    Timer<SMILTimeContainer> m_timer;
+    OwnPtr<AnimationClock> m_animationClock;
+    Timer<SMILTimeContainer> m_wakeupTimer;
 
     typedef pair<SVGElement*, QualifiedName> ElementAttributePair;
     typedef Vector<SVGSMILElement*> AnimationsVector;
     typedef HashMap<ElementAttributePair, OwnPtr<AnimationsVector> > GroupedAnimationsMap;
     GroupedAnimationsMap m_scheduledAnimations;
 
     SVGSVGElement* m_ownerSVGElement;
 
 #ifndef NDEBUG
     bool m_preventScheduledAnimationsChanges;
 #endif
 };
 }
 
 #endif // SMILTimeContainer_h