src/third_party/WebKit/Source/core/animation/CompositorPendingAnimations.cpp

   1 /*
   2  * Copyright (C) 2013 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "core/animation/CompositorPendingAnimations.h"
  33
  34 #include "core/animation/Animation.h"
  35 #include "core/animation/AnimationTimeline.h"
  36 #include "core/frame/FrameView.h"
  37 #include "core/page/Page.h"
  38 #include "core/rendering/RenderLayer.h"
  39
  40 namespace blink {
  41
  42 void CompositorPendingAnimations::add(AnimationPlayer* player)
  43 {
  44     ASSERT(player);
  45     ASSERT(m_pending.find(player) == kNotFound);
  46     m_pending.append(player);
  47
  48     Document* document = player->timeline()->document();
  49     if (document->view())
  50         document->view()->scheduleAnimation();
  51
  52     bool visible = document->page() && document->page()->visibilityState() == PageVisibilityStateVisible;
  53     if (!visible && !m_timer.isActive()) {
  54         m_timer.startOneShot(0, FROM_HERE);
  55     }
  56 }
  57
  58 bool CompositorPendingAnimations::update(bool startOnCompositor)
  59 {
  60     Vector<AnimationPlayer*> waitingForStartTime;
  61     bool startedSynchronizedOnCompositor = false;
  62
  63     WillBeHeapVector<RefPtrWillBeMember<AnimationPlayer> > players;
  64     players.swap(m_pending);
  65
  66     for (size_t i = 0; i < players.size(); ++i) {
  67         AnimationPlayer& player = *players[i].get();
  68         bool hadCompositorAnimation = player.hasActiveAnimationsOnCompositor();
  69         player.preCommit(startOnCompositor);
  70         if (player.hasActiveAnimationsOnCompositor() && !hadCompositorAnimation) {
  71             startedSynchronizedOnCompositor = true;
  72         }
  73
  74         if (player.playing() && !player.hasStartTime()) {
  75             waitingForStartTime.append(&player);
  76         }
  77     }
  78
  79     // If any synchronized animations were started on the compositor, all
  80     // remaning synchronized animations need to wait for the synchronized
  81     // start time. Otherwise they may start immediately.
  82     if (startedSynchronizedOnCompositor) {
  83         for (size_t i = 0; i < waitingForStartTime.size(); ++i) {
  84             if (!waitingForStartTime[i]->hasStartTime()) {
  85                 m_waitingForCompositorAnimationStart.append(waitingForStartTime[i]);
  86             }
  87         }
  88     } else {
  89         for (size_t i = 0; i < waitingForStartTime.size(); ++i) {
  90             if (!waitingForStartTime[i]->hasStartTime()) {
  91                 waitingForStartTime[i]->notifyCompositorStartTime(waitingForStartTime[i]->timeline()->currentTimeInternal());
  92             }
  93         }
  94     }
  95
  96     // FIXME: The postCommit should happen *after* the commit, not before.
  97     for (size_t i = 0; i < players.size(); ++i) {
  98         AnimationPlayer& player = *players[i].get();
  99         player.postCommit(player.timeline()->currentTimeInternal());
 100     }
 101
 102     ASSERT(m_pending.isEmpty());
 103
 104     if (startedSynchronizedOnCompositor)
 105         return true;
 106
 107     if (m_waitingForCompositorAnimationStart.isEmpty())
 108         return false;
 109
 110     // Check if we're still waiting for any compositor animations to start.
 111     for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
 112         if (m_waitingForCompositorAnimationStart[i].get()->hasActiveAnimationsOnCompositor())
 113             return true;
 114     }
 115
 116     // If not, go ahead and start any animations that were waiting.
 117     notifyAnimationStarted(monotonicallyIncreasingTime(), false);
 118
 119     ASSERT(m_pending.isEmpty());
 120     return false;
 121 }
 122
 123 void CompositorPendingAnimations::notifyAnimationStarted(double monotonicAnimationStartTime, bool startedOnCompositor)
 124 {
 125     TRACE_EVENT0("blink", "CompositorPendingAnimations::notifyCompositorAnimationStarted");
 126     for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
 127         AnimationPlayer* player = m_waitingForCompositorAnimationStart[i].get();
 128         if (player->hasStartTime())
 129             continue;
 130         double effectiveStartTime = monotonicAnimationStartTime - player->timeline()->zeroTime();
 131         if (startedOnCompositor) {
 132             player->notifyCompositorStartTime(effectiveStartTime);
 133         } else {
 134             player->notifyStartTime(effectiveStartTime);
 135         }
 136     }
 137
 138     m_waitingForCompositorAnimationStart.clear();
 139 }
 140
 141 void CompositorPendingAnimations::notifyCompositorAnimationStarted(double monotonicAnimationStartTime)
 142 {
 143     TRACE_EVENT0("blink", "CompositorPendingAnimations::notifyCompositorAnimationStarted");
 144     notifyAnimationStarted(monotonicAnimationStartTime, true);
 145 }
 146
 147 void CompositorPendingAnimations::trace(Visitor* visitor)
 148 {
 149     visitor->trace(m_pending);
 150     visitor->trace(m_waitingForCompositorAnimationStart);
 151 }
 152
 153 } // namespace