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      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 WebCore {
     41 
     42 void CompositorPendingAnimations::add(AnimationPlayer* player)
     43 {
     44     Page* page = player->timeline()->document()->page();
     45     bool visible = page && page->visibilityState() == PageVisibilityStateVisible;
     46     if (!player->hasStartTime() && !visible)
     47         player->setStartTimeInternal(player->timeline()->currentTimeInternal(), true);
     48 
     49     m_pending.append(player);
     50 }
     51 
     52 bool CompositorPendingAnimations::startPendingAnimations()
     53 {
     54     bool startedSynchronizedOnCompositor = false;
     55     for (size_t i = 0; i < m_pending.size(); ++i) {
     56         if (!m_pending[i]->hasActiveAnimationsOnCompositor() && m_pending[i]->maybeStartAnimationOnCompositor() && !m_pending[i]->hasStartTime())
     57             startedSynchronizedOnCompositor = true;
     58     }
     59 
     60     // If any synchronized animations were started on the compositor, all
     61     // remaning synchronized animations need to wait for the synchronized
     62     // start time. Otherwise they may start immediately.
     63     if (startedSynchronizedOnCompositor) {
     64         for (size_t i = 0; i < m_pending.size(); ++i) {
     65             if (!m_pending[i]->hasStartTime()) {
     66                 m_waitingForCompositorAnimationStart.append(m_pending[i]);
     67             }
     68         }
     69     } else {
     70         for (size_t i = 0; i < m_pending.size(); ++i) {
     71             if (!m_pending[i]->hasStartTime()) {
     72                 m_pending[i]->setStartTimeInternal(m_pending[i]->timeline()->currentTimeInternal(), true);
     73             }
     74         }
     75     }
     76     m_pending.clear();
     77 
     78     if (startedSynchronizedOnCompositor || m_waitingForCompositorAnimationStart.isEmpty())
     79         return !m_waitingForCompositorAnimationStart.isEmpty();
     80 
     81     // Check if we're still waiting for any compositor animations to start.
     82     for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
     83         if (m_waitingForCompositorAnimationStart[i].get()->hasActiveAnimationsOnCompositor())
     84             return true;
     85     }
     86 
     87     // If not, go ahead and start any animations that were waiting.
     88     notifyCompositorAnimationStarted(monotonicallyIncreasingTime());
     89     return false;
     90 }
     91 
     92 void CompositorPendingAnimations::notifyCompositorAnimationStarted(double monotonicAnimationStartTime)
     93 {
     94     for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
     95         AnimationPlayer* player = m_waitingForCompositorAnimationStart[i].get();
     96         player->setStartTimeInternal(monotonicAnimationStartTime - player->timeline()->zeroTime(), true);
     97     }
     98 
     99     m_waitingForCompositorAnimationStart.clear();
    100 }
    101 
    102 void CompositorPendingAnimations::trace(Visitor* visitor)
    103 {
    104     visitor->trace(m_pending);
    105     visitor->trace(m_waitingForCompositorAnimationStart);
    106 }
    107 
    108 } // namespace
    109