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 BackingStore_h 27#define BackingStore_h 28 29#include <WebCore/IntSize.h> 30#include <wtf/Noncopyable.h> 31#include <wtf/PassOwnPtr.h> 32 33#if PLATFORM(MAC) 34#include <wtf/RetainPtr.h> 35#elif PLATFORM(WIN) 36#include <wtf/OwnPtr.h> 37#endif 38 39namespace WebCore { 40 class IntRect; 41} 42 43namespace WebKit { 44 45class ShareableBitmap; 46class UpdateInfo; 47class WebPageProxy; 48 49class BackingStore { 50 WTF_MAKE_NONCOPYABLE(BackingStore); 51 52public: 53 static PassOwnPtr<BackingStore> create(const WebCore::IntSize&, WebPageProxy*); 54 ~BackingStore(); 55 56 const WebCore::IntSize& size() const { return m_size; } 57 58#if PLATFORM(MAC) 59 typedef CGContextRef PlatformGraphicsContext; 60#elif PLATFORM(WIN) 61 typedef HDC PlatformGraphicsContext; 62#endif 63 64 void paint(PlatformGraphicsContext, const WebCore::IntRect&); 65 void incorporateUpdate(const UpdateInfo&); 66 67private: 68 BackingStore(const WebCore::IntSize&, WebPageProxy*); 69 70 void incorporateUpdate(ShareableBitmap*, const UpdateInfo&); 71 void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset); 72 73 WebCore::IntSize m_size; 74 WebPageProxy* m_webPageProxy; 75 76#if PLATFORM(MAC) 77 CGContextRef backingStoreContext(); 78 79 RetainPtr<CGLayerRef> m_cgLayer; 80 RetainPtr<CGContextRef> m_bitmapContext; 81#elif PLATFORM(WIN) 82 OwnPtr<HBITMAP> m_bitmap; 83#endif 84}; 85 86} // namespace WebKit 87 88#endif // BackingStore_h 89