| /* |
| * Copyright (C) 2011 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 COMPUTER, 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" |
| |
| #if USE(ACCELERATED_COMPOSITING) |
| |
| #include "LayerFlushScheduler.h" |
| |
| #include <wtf/AutodrainedPool.h> |
| |
| namespace WebCore { |
| |
| static const CFIndex CoreAnimationRunLoopOrder = 2000000; |
| static const CFIndex LayerFlushRunLoopOrder = CoreAnimationRunLoopOrder - 1; |
| |
| LayerFlushScheduler::LayerFlushScheduler(LayerFlushSchedulerClient* client) |
| : m_isSuspended(false) |
| , m_client(client) |
| { |
| ASSERT_ARG(client, client); |
| } |
| |
| LayerFlushScheduler::~LayerFlushScheduler() |
| { |
| ASSERT(!m_runLoopObserver); |
| } |
| |
| void LayerFlushScheduler::runLoopObserverCallback(CFRunLoopObserverRef, CFRunLoopActivity, void* context) |
| { |
| static_cast<LayerFlushScheduler*>(context)->runLoopObserverCallback(); |
| } |
| |
| void LayerFlushScheduler::runLoopObserverCallback() |
| { |
| ASSERT(m_runLoopObserver); |
| ASSERT(!m_isSuspended); |
| |
| AutodrainedPool pool; |
| if (m_client->flushLayers()) |
| invalidate(); |
| } |
| |
| void LayerFlushScheduler::schedule() |
| { |
| if (m_isSuspended) |
| return; |
| |
| CFRunLoopRef currentRunLoop = CFRunLoopGetCurrent(); |
| |
| // Make sure we wake up the loop or the observer could be delayed until some other source fires. |
| CFRunLoopWakeUp(currentRunLoop); |
| |
| if (m_runLoopObserver) |
| return; |
| |
| CFRunLoopObserverContext context = { 0, this, 0, 0, 0 }; |
| m_runLoopObserver.adoptCF(CFRunLoopObserverCreate(0, kCFRunLoopBeforeWaiting | kCFRunLoopExit, true, LayerFlushRunLoopOrder, runLoopObserverCallback, &context)); |
| |
| CFRunLoopAddObserver(currentRunLoop, m_runLoopObserver.get(), kCFRunLoopCommonModes); |
| } |
| |
| void LayerFlushScheduler::invalidate() |
| { |
| if (m_runLoopObserver) { |
| CFRunLoopObserverInvalidate(m_runLoopObserver.get()); |
| m_runLoopObserver = nullptr; |
| } |
| } |
| |
| } // namespace WebCore |
| |
| #endif // USE(ACCELERATED_COMPOSITING) |