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. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef LayerTreeContext_h 27 #define LayerTreeContext_h 28 29 namespace CoreIPC { 30 class ArgumentDecoder; 31 class ArgumentEncoder; 32 } 33 34 #if USE(ACCELERATED_COMPOSITING) 35 36 namespace WebKit { 37 38 class LayerTreeContext { 39 public: 40 LayerTreeContext(); 41 ~LayerTreeContext(); 42 43 void encode(CoreIPC::ArgumentEncoder*) const; 44 static bool decode(CoreIPC::ArgumentDecoder*, LayerTreeContext&); 45 46 bool isEmpty() const; 47 48 #if PLATFORM(MAC) 49 uint32_t contextID; 50 #endif 51 }; 52 53 bool operator==(const LayerTreeContext&, const LayerTreeContext&); 54 55 inline bool operator!=(const LayerTreeContext& a, const LayerTreeContext& b) 56 { 57 return !(a == b); 58 } 59 60 }; 61 62 #endif // USE(ACCELERATED_COMPOSITING) 63 64 #endif // LayerTreeContext_h 65
