| /* |
| * Copyright (C) 2010, 2011 Research In Motion Limited. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "config.h" |
| |
| #if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR) |
| |
| #include "DisplayRefreshMonitor.h" |
| |
| #include <wtf/CurrentTime.h> |
| #include <wtf/MainThread.h> |
| |
| namespace WebCore { |
| |
| DisplayAnimationClient::DisplayAnimationClient(DisplayRefreshMonitor *monitor) |
| : m_monitor(monitor) |
| { |
| } |
| |
| void DisplayAnimationClient::animationFrameChanged() |
| { |
| m_monitor->displayLinkFired(); |
| } |
| |
| DisplayRefreshMonitor::~DisplayRefreshMonitor() |
| { |
| stopAnimationClient(); |
| cancelCallOnMainThread(DisplayRefreshMonitor::handleDisplayRefreshedNotificationOnMainThread, this); |
| } |
| |
| void DisplayRefreshMonitor::startAnimationClient() |
| { |
| if (m_animationClient) |
| return; |
| |
| m_animationClient = new DisplayAnimationClient(this); |
| BlackBerry::Platform::AnimationFrameRateController::instance()->addClient(m_animationClient); |
| } |
| |
| void DisplayRefreshMonitor::stopAnimationClient() |
| { |
| if (!m_animationClient) |
| return; |
| |
| BlackBerry::Platform::AnimationFrameRateController::instance()->removeClient(m_animationClient); |
| delete m_animationClient; |
| m_animationClient = 0; |
| } |
| |
| bool DisplayRefreshMonitor::requestRefreshCallback() |
| { |
| MutexLocker lock(m_mutex); |
| |
| startAnimationClient(); |
| |
| m_scheduled = true; |
| return true; |
| } |
| |
| void DisplayRefreshMonitor::displayLinkFired() |
| { |
| if (!m_mutex.tryLock()) |
| return; |
| |
| if (!m_previousFrameDone) { |
| m_mutex.unlock(); |
| return; |
| } |
| |
| m_previousFrameDone = false; |
| |
| m_monotonicAnimationStartTime = monotonicallyIncreasingTime(); |
| |
| callOnMainThread(handleDisplayRefreshedNotificationOnMainThread, this); |
| m_mutex.unlock(); |
| } |
| |
| } |
| |
| #endif // USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR) |