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This CL generated by |sed -i '/sky\/engine\/config.h/d'| and a manual sweep to catch some oddballs. TBR=eseidel@chromium.org Review URL: https://codereview.chromium.org/1206763002.
82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
/*
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* Copyright (c) 2014, Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "sky/engine/core/animation/AnimationClock.h"
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#include <math.h>
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#include "sky/engine/wtf/CurrentTime.h"
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namespace {
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// FIXME: This is an approximation of time between frames, used when
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// ticking the animation clock outside of animation frame callbacks.
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// Ideally this would be generated by the compositor.
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const double approximateFrameTime = 1 / 60.0;
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}
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namespace blink {
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unsigned AnimationClock::s_currentTask = 0;
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void AnimationClock::updateTime(double time)
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{
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if (time > m_time)
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m_time = time;
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m_currentTask = s_currentTask;
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}
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double AnimationClock::currentTime()
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{
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if (m_currentTask != s_currentTask) {
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const double currentTime = m_monotonicallyIncreasingTime();
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if (m_time < currentTime) {
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// Advance to the first estimated frame after the current time.
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const double frameShift = fmod(currentTime - m_time, approximateFrameTime);
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const double newTime = currentTime + (approximateFrameTime - frameShift);
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ASSERT(newTime >= currentTime);
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ASSERT(newTime <= currentTime + approximateFrameTime);
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updateTime(newTime);
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} else {
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m_currentTask = s_currentTask;
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}
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}
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return m_time;
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}
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void AnimationClock::resetTimeForTesting()
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{
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m_time = 0;
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m_currentTask = 0;
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s_currentTask = 0;
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}
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}
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