1 /* 2 * Copyright (C) 2010 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 UpdateChunk_h 27 #define UpdateChunk_h 28 29 #include <WebCore/IntRect.h> 30 #include <wtf/RetainPtr.h> 31 32 namespace CoreIPC { 33 class ArgumentEncoder; 34 class ArgumentDecoder; 35 } 36 37 namespace WebKit { 38 39 class UpdateChunk { 40 public: 41 UpdateChunk(); 42 UpdateChunk(const WebCore::IntRect&); 43 ~UpdateChunk(); 44 45 uint8_t* data() { return m_data; } 46 const WebCore::IntRect& rect() const { return m_rect; } 47 bool isEmpty() const { return m_rect.isEmpty(); } 48 49 void encode(CoreIPC::ArgumentEncoder*) const; 50 static bool decode(CoreIPC::ArgumentDecoder*, UpdateChunk&); 51 52 RetainPtr<CGImageRef> createImage(); 53 54 private: 55 size_t size() const { return m_rect.width() * 4 * m_rect.height(); } 56 57 WebCore::IntRect m_rect; 58 59 // This needs to be mutable, because encoding an update chunk will hand over its memory to the target process. 60 mutable uint8_t* m_data; 61 size_t m_size; 62 }; 63 64 } // namespace WebKit 65 66 #endif // UpdateChunk_h 67
