| /* |
| * Copyright (C) 2010, 2014 Apple 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "DisplayRefreshMonitorMac.h" |
| |
| #if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR) && PLATFORM(MAC) |
| |
| #include <QuartzCore/QuartzCore.h> |
| #include <wtf/RunLoop.h> |
| |
| namespace WebCore { |
| |
| DisplayRefreshMonitorMac::DisplayRefreshMonitorMac(PlatformDisplayID displayID) |
| : DisplayRefreshMonitor(displayID) |
| { |
| } |
| |
| DisplayRefreshMonitorMac::~DisplayRefreshMonitorMac() |
| { |
| ASSERT(!m_displayLink); |
| } |
| |
| void DisplayRefreshMonitorMac::stop() |
| { |
| if (!m_displayLink) |
| return; |
| |
| CVDisplayLinkStop(m_displayLink); |
| CVDisplayLinkRelease(m_displayLink); |
| m_displayLink = nullptr; |
| } |
| |
| static CVReturn displayLinkCallback(CVDisplayLinkRef, const CVTimeStamp*, const CVTimeStamp*, CVOptionFlags, CVOptionFlags*, void* data) |
| { |
| DisplayRefreshMonitorMac* monitor = static_cast<DisplayRefreshMonitorMac*>(data); |
| monitor->displayLinkFired(); |
| return kCVReturnSuccess; |
| } |
| |
| bool DisplayRefreshMonitorMac::requestRefreshCallback() |
| { |
| if (!isActive()) |
| return false; |
| |
| if (!m_displayLink) { |
| setIsActive(false); |
| CVReturn error = CVDisplayLinkCreateWithCGDisplay(displayID(), &m_displayLink); |
| if (error) |
| return false; |
| |
| error = CVDisplayLinkSetOutputCallback(m_displayLink, displayLinkCallback, this); |
| if (error) |
| return false; |
| |
| error = CVDisplayLinkStart(m_displayLink); |
| if (error) |
| return false; |
| |
| setIsActive(true); |
| } |
| |
| LockHolder lock(mutex()); |
| setIsScheduled(true); |
| return true; |
| } |
| |
| void DisplayRefreshMonitorMac::displayLinkFired() |
| { |
| LockHolder lock(mutex()); |
| if (!isPreviousFrameDone()) |
| return; |
| |
| setIsPreviousFrameDone(false); |
| |
| RunLoop::main().dispatch([this, protectedThis = makeRef(*this)] { |
| if (m_displayLink) |
| handleDisplayRefreshedNotificationOnMainThread(this); |
| }); |
| } |
| |
| } |
| |
| #endif // USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR) && PLATFORM(MAC) |