| /* |
| * Copyright (C) 2018 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. AND ITS CONTRIBUTORS ``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 ITS 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 "DisplayLink.h" |
| |
| #if PLATFORM(MAC) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 101400 |
| |
| #include "DrawingAreaMessages.h" |
| #include "WebPageProxy.h" |
| #include "WebProcessProxy.h" |
| #include <wtf/ProcessPrivilege.h> |
| |
| namespace WebKit { |
| |
| DisplayLink::DisplayLink(WebCore::PlatformDisplayID displayID, WebPageProxy& webPageProxy) |
| { |
| RELEASE_ASSERT(hasProcessPrivilege(ProcessPrivilege::CanCommunicateWithWindowServer)); |
| CVReturn error = CVDisplayLinkCreateWithCGDisplay(displayID, &m_displayLink); |
| if (error) { |
| WTFLogAlways("Could not create a display link: %d", error); |
| return; |
| } |
| |
| error = CVDisplayLinkSetOutputCallback(m_displayLink, displayLinkCallback, &webPageProxy); |
| if (error) { |
| WTFLogAlways("Could not set the display link output callback: %d", error); |
| return; |
| } |
| |
| error = CVDisplayLinkStart(m_displayLink); |
| if (error) |
| WTFLogAlways("Could not start the display link: %d", error); |
| } |
| |
| DisplayLink::~DisplayLink() |
| { |
| RELEASE_ASSERT(hasProcessPrivilege(ProcessPrivilege::CanCommunicateWithWindowServer)); |
| ASSERT(m_displayLink); |
| if (!m_displayLink) |
| return; |
| |
| CVDisplayLinkStop(m_displayLink); |
| CVDisplayLinkRelease(m_displayLink); |
| } |
| |
| void DisplayLink::addObserver(unsigned observerID) |
| { |
| m_observers.add(observerID); |
| } |
| |
| void DisplayLink::removeObserver(unsigned observerID) |
| { |
| m_observers.remove(observerID); |
| } |
| |
| bool DisplayLink::hasObservers() const |
| { |
| return !m_observers.isEmpty(); |
| } |
| |
| CVReturn DisplayLink::displayLinkCallback(CVDisplayLinkRef displayLinkRef, const CVTimeStamp*, const CVTimeStamp*, CVOptionFlags, CVOptionFlags*, void* data) |
| { |
| WebPageProxy* webPageProxy = reinterpret_cast<WebPageProxy*>(data); |
| callOnMainThread([webPageProxy = makeRefPtr(webPageProxy)] { |
| webPageProxy->process().send(Messages::DrawingArea::DisplayWasRefreshed(), webPageProxy->pageID()); |
| }); |
| return kCVReturnSuccess; |
| } |
| |
| } |
| |
| #endif |