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;
 }
 
 }
 
 PassRefPtrWillBeRawPtr<AnimationPlayer> AnimationPlayer::create(AnimationNode* source, AnimationTimeline* timeline)
 {
     if (!timeline) {
         // FIXME: Support creating players without a timeline.
         return nullptr;
     }
 
     RefPtrWillBeRawPtr<AnimationPlayer> player = adoptRefWillBeNoop(new AnimationPlayer(timeline->document()->contextDocument().get(), *timeline, source));
     player->suspendIfNeeded();
 
     if (timeline) {
         timeline->playerAttached(*player);
+        player->attachCompositorTimeline();
     }
 
     return player.release();
 }
 
 AnimationPlayer::AnimationPlayer(ExecutionContext* executionContext, AnimationTimeline& timeline, AnimationNode* content)
     : ActiveDOMObject(executionContext)
     , m_playState(Idle)
     , m_playbackRate(1)
     , m_startTime(nullValue())
@@ skipping 22 matching lines @@
 }
 
 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 138 matching lines @@
 
     ASSERT(!m_compositorState || !std::isnan(m_compositorState->startTime));
 
     if (!shouldStart) {
         m_currentTimePending = false;
     }
 
     if (shouldStart) {
         m_compositorGroup = compositorGroup;
         if (startOnCompositor) {
+            if (isCandidateForAnimationOnCompositor())
+                createCompositorPlayer();
+
             if (maybeStartAnimationOnCompositor())
                 m_compositorState = adoptPtr(new CompositorState(*this));
             else
                 cancelIncompatibleAnimationsOnCompositor();
         }
     }
 }
 
 void AnimationPlayer::postCommit(double timelineTime)
 {
@@ skipping 138 matching lines @@
         // Even though this player is not outdated, time to effect change is
         // infinity until start time is set.
         m_timeline->wake();
     }
 }
 
 void AnimationPlayer::setSource(AnimationNode* newSource)
 {
     if (m_content == newSource)
         return;
-
     PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand, SetCompositorPendingWithSourceChanged);
 
     double storedCurrentTime = currentTimeInternal();
     if (m_content)
         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();
@@ skipping 220 matching lines @@
     setCurrentTimeInternal(storedCurrentTime, TimingUpdateOnDemand);
 }
 
 void AnimationPlayer::setOutdated()
 {
     m_outdated = true;
     if (m_timeline)
         m_timeline->setOutdatedAnimationPlayer(this);
 }
 
-bool AnimationPlayer::canStartAnimationOnCompositor()
+bool AnimationPlayer::canStartAnimationOnCompositor() const
 {
     // FIXME: Timeline playback rates should be compositable
     if (m_playbackRate == 0 || (std::isinf(sourceEnd()) && m_playbackRate < 0) || (timeline() && timeline()->playbackRate() != 1))
         return false;
 
     return m_timeline && m_content && m_content->isAnimation() && playing();
 }
 
+bool AnimationPlayer::isCandidateForAnimationOnCompositor() const
+{
+    if (!canStartAnimationOnCompositor())
+        return false;
+
+    return toAnimation(m_content.get())->isCandidateForAnimationOnCompositor(m_playbackRate);
+}
+
 bool AnimationPlayer::maybeStartAnimationOnCompositor()
 {
     if (!canStartAnimationOnCompositor())
         return false;
 
     bool reversed = m_playbackRate < 0;
 
     double startTime = timeline()->zeroTime() + startTimeInternal();
     if (reversed) {
         startTime -= sourceEnd() / fabs(m_playbackRate);
     }
 
     double timeOffset = 0;
     if (std::isnan(startTime)) {
         timeOffset = reversed ? sourceEnd() - currentTimeInternal() : currentTimeInternal();
         timeOffset = timeOffset / fabs(m_playbackRate);
     }
     ASSERT(m_compositorGroup != 0);
     return toAnimation(m_content.get())->maybeStartAnimationOnCompositor(m_compositorGroup, startTime, timeOffset, m_playbackRate);
 }
 
 void AnimationPlayer::setCompositorPending(bool sourceChanged)
 {
     // FIXME: Animation could notify this directly?
     if (!hasActiveAnimationsOnCompositor()) {
+        destroyCompositorPlayer();
         m_compositorState.release();
     }
     if (sourceChanged && m_compositorState) {
         m_compositorState->sourceChanged = true;
     }
     if (m_compositorPending || m_isPausedForTesting) {
         return;
     }
 
     if (sourceChanged || !m_compositorState
         || !playing() || m_compositorState->playbackRate != m_playbackRate
         || m_compositorState->startTime != m_startTime) {
         m_compositorPending = true;
         timeline()->document()->compositorPendingAnimations().add(this);
     }
 }
 
 void AnimationPlayer::cancelAnimationOnCompositor()
 {
     if (hasActiveAnimationsOnCompositor())
         toAnimation(m_content.get())->cancelAnimationOnCompositor();
+
+    destroyCompositorPlayer();
 }
 
 void AnimationPlayer::restartAnimationOnCompositor()
 {
     if (hasActiveAnimationsOnCompositor())
         toAnimation(m_content.get())->restartAnimationOnCompositor();
 }
 
 void AnimationPlayer::cancelIncompatibleAnimationsOnCompositor()
 {
@@ skipping 82 matching lines @@
     ASSERT(!m_stateIsBeingUpdated);
     m_stateIsBeingUpdated = true;
 }
 
 void AnimationPlayer::endUpdatingState()
 {
     ASSERT(m_stateIsBeingUpdated);
     m_stateIsBeingUpdated = false;
 }
 
+void AnimationPlayer::createCompositorPlayer()
+{
+    if (RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() && !m_compositorPlayer && Platform::current()->compositorSupport()) {
+        m_compositorPlayer = adoptPtr(Platform::current()->compositorSupport()->createAnimationPlayer());
+        ASSERT(m_compositorPlayer);
+        m_compositorPlayer->setAnimationDelegate(this);
+        attachCompositorTimeline();
+    }
+
+    attachCompositedLayers();
+}
+
+void AnimationPlayer::destroyCompositorPlayer()
+{
+    detachCompositedLayers();
+
+    if (m_compositorPlayer) {
+        detachCompositorTimeline();
+        m_compositorPlayer->setAnimationDelegate(nullptr);
+    }
+    m_compositorPlayer.clear();
+}
+
+void AnimationPlayer::attachCompositorTimeline()
+{
+    if (m_compositorPlayer) {
+        WebCompositorAnimationTimeline* timeline = m_timeline ? m_timeline->compositorTimeline() : nullptr;
+        if (timeline)
+            timeline->playerAttached(*this);
+    }
+}
+
+void AnimationPlayer::detachCompositorTimeline()
+{
+    if (m_compositorPlayer) {
+        WebCompositorAnimationTimeline* timeline = m_timeline ? m_timeline->compositorTimeline() : nullptr;
+        if (timeline)
+            timeline->playerDestroyed(*this);
+    }
+}
+
+void AnimationPlayer::attachCompositedLayers()
+{
+    if (!RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() || !m_compositorPlayer)
+        return;
+
+    ASSERT(m_content);
+    ASSERT(m_content->isAnimation());
+
+    if (toAnimation(m_content.get())->canAttachCompositedLayers())
+        toAnimation(m_content.get())->attachCompositedLayers();
+}
+
+void AnimationPlayer::detachCompositedLayers()
+{
+    if (m_compositorPlayer && m_compositorPlayer->isLayerAttached())
+        m_compositorPlayer->detachLayer();
+}
+
+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