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 21 matching lines @@
 #include "core/animation/AnimationPlayer.h"
 
 #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/RuntimeEnabledFeatures.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 28 matching lines @@
     , m_content(content)
     , m_timeline(&timeline)
     , m_paused(false)
     , m_held(true)
     , m_isPausedForTesting(false)
     , m_outdated(false)
     , m_finished(true)
     , m_compositorState(nullptr)
     , m_compositorPending(false)
     , m_compositorGroup(0)
+    , m_attachCompositorPlayerToElement(false)
     , m_currentTimePending(false)
     , m_stateIsBeingUpdated(false)
 {
+    createCompositorPlayer();
+
     if (m_content) {
         if (m_content->player()) {
             m_content->player()->cancel();
             m_content->player()->setSource(0);
         }
         m_content->attach(this);
+        attachElementToPlayer();
     }
 }
 
 AnimationPlayer::~AnimationPlayer()
 {
 #if !ENABLE(OILPAN)
-    if (m_content)
+    if (m_content) {
+        detachElementFromPlayer();
         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 305 matching lines @@
 }
 
 void AnimationPlayer::setSource(AnimationNode* newSource)
 {
     if (m_content == newSource)
         return;
 
     PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand, SetCompositorPendingWithSourceChanged);
 
     double storedCurrentTime = currentTimeInternal();
-    if (m_content)
+    if (m_content) {
+        detachElementFromPlayer();
         m_content->detach();
+    }
     m_content = newSource;
     if (newSource) {
         // FIXME: This logic needs to be updated once groups are implemented
         if (newSource->player()) {
             newSource->player()->cancel();
             newSource->player()->setSource(0);
         }
         newSource->attach(this);
+        attachElementToPlayer();
         setOutdated();
     }
     setCurrentTimeInternal(storedCurrentTime, TimingUpdateOnDemand);
 }
 
 const char* AnimationPlayer::playStateString(AnimationPlayState playState)
 {
     switch (playState) {
     case Idle:
         return "idle";
@@ skipping 367 matching lines @@
     ASSERT(!m_stateIsBeingUpdated);
     m_stateIsBeingUpdated = true;
 }
 
 void AnimationPlayer::endUpdatingState()
 {
     ASSERT(m_stateIsBeingUpdated);
     m_stateIsBeingUpdated = false;
 }
 
+void AnimationPlayer::createCompositorPlayer()
+{
+    if (RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() && Platform::current()->compositorSupport()) {
+        m_compositorPlayer = adoptPtr(Platform::current()->compositorSupport()->createAnimationPlayer());
+        ASSERT(m_compositorPlayer);
+        m_compositorPlayer->setAnimationDelegate(this);
+    }
+}
+
+void AnimationPlayer::destroyCompositorPlayer()
+{
+    if (m_compositorPlayer)
+        m_compositorPlayer->setAnimationDelegate(nullptr);
+    m_compositorPlayer.clear();
+}
+
+void AnimationPlayer::attachElementToPlayer()
+{
+    m_attachCompositorPlayerToElement = true;
+    updateCompositorPlayerToElementAttachment();
+}
+
+void AnimationPlayer::detachElementFromPlayer()
+{
+    m_attachCompositorPlayerToElement = false;
+    if (m_compositorPlayer && m_compositorPlayer->isLayerAttached())
+        m_compositorPlayer->detachLayer();
+}
+
+void AnimationPlayer::updateCompositorPlayerToElementAttachment()
+{
+    if (!RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() || !m_attachCompositorPlayerToElement)
+        return;
+    if (!m_compositorPlayer || !m_content || !m_content->isAnimation() || !toAnimation(m_content.get())->canAttachElementToCompositorPlayer())
+        return;
+
+    m_attachCompositorPlayerToElement = false;
+    toAnimation(m_content.get())->attachElementToCompositorPlayer();
+}
+
+void AnimationPlayer::notifyAnimationStarted(double monotonicTime, int group)
+{
+    ASSERT(RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled());
+    timeline()->document()->compositorPendingAnimations().notifyCompositorAnimationStarted(monotonicTime, group);
+}
+
 AnimationPlayer::PlayStateUpdateScope::PlayStateUpdateScope(AnimationPlayer& player, TimingUpdateReason reason, CompositorPendingChange compositorPendingChange)
     : m_player(player)
     , m_initialPlayState(m_player->playStateInternal())
     , m_compositorPendingChange(compositorPendingChange)
 {
     m_player->beginUpdatingState();
     m_player->updateCurrentTimingState(reason);
 }
 
 AnimationPlayer::PlayStateUpdateScope::~PlayStateUpdateScope()
@@ skipping 93 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