1 /* 2 * Copyright (C) 2011 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef LayerChangesFlusher_h 27 #define LayerChangesFlusher_h 28 29 #if USE(ACCELERATED_COMPOSITING) 30 31 #include <windows.h> 32 #include <wtf/HashSet.h> 33 #include <wtf/Noncopyable.h> 34 35 namespace WebCore { 36 37 class AbstractCACFLayerTreeHost; 38 39 class LayerChangesFlusher { 40 WTF_MAKE_NONCOPYABLE(LayerChangesFlusher); 41 public: 42 static LayerChangesFlusher& shared(); 43 44 void flushPendingLayerChangesSoon(AbstractCACFLayerTreeHost*); 45 void cancelPendingFlush(AbstractCACFLayerTreeHost*); 46 47 private: 48 LayerChangesFlusher(); 49 ~LayerChangesFlusher(); 50 51 static LRESULT CALLBACK hookCallback(int code, WPARAM, LPARAM); 52 LRESULT hookFired(int code, WPARAM, LPARAM); 53 void setHook(); 54 void removeHook(); 55 56 HashSet<AbstractCACFLayerTreeHost*> m_hostsWithChangesToFlush; 57 HHOOK m_hook; 58 bool m_isCallingHosts; 59 }; 60 61 } // namespace WebCore 62 63 #endif // USE(ACCELERATED_COMPOSITING) 64 65 #endif // LayerChangesFlusher_h 66
