Animations: Introduce compositor AnimationPlayer and AnimationTimeline.

Source/core/animation/AnimationPlayer.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 22 matching lines @@
 
 #include "core/animation/Animation.h"
 #include "core/animation/AnimationTimeline.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/events/AnimationPlayerEvent.h"
 #include "core/frame/UseCounter.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "platform/TraceEvent.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebCompositorAnimationPlayer.h"
+#include "public/platform/WebCompositorSupport.h"
 #include "wtf/MathExtras.h"
 
 namespace blink {
 
 namespace {
 
 static unsigned nextSequenceNumber()
 {
     static unsigned next = 0;
     return ++next;
@@ skipping 31 matching lines @@
     , m_held(true)
     , m_isPausedForTesting(false)
     , m_outdated(false)
     , m_finished(true)
     , m_compositorState(nullptr)
     , m_compositorPending(false)
     , m_compositorGroup(0)
     , m_currentTimePending(false)
     , m_stateIsBeingUpdated(false)
 {
+    createCompositorPlayer();

[dstockwell, 2015/02/26 00:07:12]

Why do we always create a compositor player? Seems like a waste of
time/resources.

[loyso (OOO), 2015/02/26 03:24:57]

Because draft. In reality we must know beforehand, whether we need it. (If it
has compositor-compatible animations?)

I will hide it behind runtime flag (maybe, temporary).

+
     if (m_content) {
         if (m_content->player()) {
             m_content->player()->cancel();
             m_content->player()->setSource(0);
         }
         m_content->attach(this);
     }
 }
 
 AnimationPlayer::~AnimationPlayer()
 {
 #if !ENABLE(OILPAN)
     if (m_content)
         m_content->detach();
     if (m_timeline)
         m_timeline->playerDestroyed(this);
 #endif
+
+    destroyCompositorPlayer();
 }
 
 double AnimationPlayer::sourceEnd() const
 {
     return m_content ? m_content->endTimeInternal() : 0;
 }
 
 bool AnimationPlayer::limited(double currentTime) const
 {
     return (m_playbackRate < 0 && currentTime <= 0) || (m_playbackRate > 0 && currentTime >= sourceEnd());
@@ skipping 225 matching lines @@
 
 bool AnimationPlayer::affects(const Element& element, CSSPropertyID property) const
 {
     if (!m_content || !m_content->isAnimation())
         return false;
 
     const Animation* animation = toAnimation(m_content.get());
     return (animation->target() == &element) && animation->affects(property);
 }
 
+void AnimationPlayer::notifyAnimationStarted(double monotonicTime, int group)
+{
+    timeline()->document()->compositorPendingAnimations().notifyCompositorAnimationStarted(monotonicTime, group);
+}
+
+void AnimationPlayer::notifyAnimationFinished(double monotonicTime, int group)
+{
+}
+
+void AnimationPlayer::createCompositorPlayer()
+{
+    if (Platform::current()->compositorSupport()) {
+        m_compositorPlayer = adoptPtr(Platform::current()->compositorSupport()->createAnimationPlayer());
+        m_compositorPlayer->setAnimationDelegate(this);
+    }
+}
+
+void AnimationPlayer::destroyCompositorPlayer()
+{
+    if (m_compositorPlayer)
+        m_compositorPlayer->setAnimationDelegate(nullptr);
+    m_compositorPlayer.clear();
+}
+
 double AnimationPlayer::calculateStartTime(double currentTime) const
 {
     return m_timeline->effectiveTime() - currentTime / m_playbackRate;
 }
 
 double AnimationPlayer::calculateCurrentTime() const
 {
     if (isNull(m_startTime) || !m_timeline)
         return 0;
     return (m_timeline->effectiveTime() - m_startTime) * m_playbackRate;
@@ skipping 564 matching lines @@
     visitor->trace(m_content);
     visitor->trace(m_timeline);
     visitor->trace(m_pendingFinishedEvent);
     visitor->trace(m_finishedPromise);
     visitor->trace(m_readyPromise);
     EventTargetWithInlineData::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace