1ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch/* 2ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * Copyright (C) 2011 Apple Inc. All rights reserved. 3ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * 4ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * Redistribution and use in source and binary forms, with or without 5ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * modification, are permitted provided that the following conditions 6ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * are met: 7ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * 1. Redistributions of source code must retain the above copyright 8ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * notice, this list of conditions and the following disclaimer. 9ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * 2. Redistributions in binary form must reproduce the above copyright 10ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * notice, this list of conditions and the following disclaimer in the 11ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * documentation and/or other materials provided with the distribution. 12ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * 13ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch */ 25ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 26ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch#include "config.h" 27ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch#include "LayerChangesFlusher.h" 28ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 29ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch#if USE(ACCELERATED_COMPOSITING) 30ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 312daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch#include "AbstractCACFLayerTreeHost.h" 32ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch#include <wtf/StdLibExtras.h> 33ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch#include <wtf/Vector.h> 34ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 35ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdochnamespace WebCore { 36ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 37ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen MurdochLayerChangesFlusher& LayerChangesFlusher::shared() 38ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 39ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch DEFINE_STATIC_LOCAL(LayerChangesFlusher, flusher, ()); 40ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return flusher; 41ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 42ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 43ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen MurdochLayerChangesFlusher::LayerChangesFlusher() 44ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch : m_hook(0) 45ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch , m_isCallingHosts(false) 46ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 47ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 48ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 492daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdochvoid LayerChangesFlusher::flushPendingLayerChangesSoon(AbstractCACFLayerTreeHost* host) 50ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 51ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (!m_hostsWithChangesToFlush.add(host).second || m_hook) 52ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return; 53ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 54ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch setHook(); 55ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 56ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 572daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdochvoid LayerChangesFlusher::cancelPendingFlush(AbstractCACFLayerTreeHost* host) 58ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 59ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch m_hostsWithChangesToFlush.remove(host); 60ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 61ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (!m_hostsWithChangesToFlush.isEmpty() || !m_hook) 62ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return; 63ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 64ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // We handle removing the hook when we finish calling out to the hosts, so we shouldn't 65ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // mess with it while we're in the process of calling them. 66ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (m_isCallingHosts) 67ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return; 68ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 69ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch removeHook(); 70ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 71ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 72ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen MurdochLRESULT LayerChangesFlusher::hookCallback(int code, WPARAM wParam, LPARAM lParam) 73ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 74ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return shared().hookFired(code, wParam, lParam); 75ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 76ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 77ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen MurdochLRESULT LayerChangesFlusher::hookFired(int code, WPARAM wParam, LPARAM lParam) 78ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 79ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT(m_hook); 80ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 81ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // Calling out to the hosts can cause m_hostsWithChangesToFlush to be modified, so we copy it 822daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch // into a Vector first. 832daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch Vector<AbstractCACFLayerTreeHost*> hosts; 84ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch copyToVector(m_hostsWithChangesToFlush, hosts); 85ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch m_hostsWithChangesToFlush.clear(); 86ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 87ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch m_isCallingHosts = true; 88ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch for (size_t i = 0; i < hosts.size(); ++i) 89ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch hosts[i]->flushPendingLayerChangesNow(); 90ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch m_isCallingHosts = false; 91ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 92ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch LRESULT result = ::CallNextHookEx(m_hook, code, wParam, lParam); 93ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 94ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (m_hostsWithChangesToFlush.isEmpty()) { 95ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // We won't have any work to do next time around, so just remove our hook. 96ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch removeHook(); 97ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch } 98ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 99ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return result; 100ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 101ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 102ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdochvoid LayerChangesFlusher::setHook() 103ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 104ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT(!m_hook); 105ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT(!m_isCallingHosts); 106ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 107ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch DWORD threadID = ::GetCurrentThreadId(); 108ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 1092daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch m_hook = ::SetWindowsHookExW(WH_GETMESSAGE, hookCallback, 0, threadID); 110ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT_WITH_MESSAGE(m_hook, "::SetWindowsHookExW failed with error %lu", ::GetLastError()); 111ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 112ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // Post a message to the message queue to prevent ::GetMessage from blocking, which will ensure 113ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // our hook is called soon. 114ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ::PostThreadMessageW(threadID, WM_NULL, 0, 0); 115ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 116ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 117ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdochvoid LayerChangesFlusher::removeHook() 118ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 119ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT(m_hook); 120ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT(!m_isCallingHosts); 121ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 122ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (!::UnhookWindowsHookEx(m_hook)) 123ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT_WITH_MESSAGE(false, "::UnhookWindowsHookEx failed with error %lu", ::GetLastError()); 124ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 125ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch m_hook = 0; 126ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 127ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 128ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} // namespace WebCore 129ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 130ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch#endif // USE(ACCELERATED_COMPOSITING) 131