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 39 namespace WebCore { 40 class IntRect; 41 } 42 43 namespace WebKit { 44 45 class ShareableBitmap; 46 class UpdateInfo; 47 class WebPageProxy; 48 49 class BackingStore { 50 WTF_MAKE_NONCOPYABLE(BackingStore); 51 52 public: 53 static PassOwnPtr<BackingStore> create(const WebCore::IntSize&, WebPageProxy*); 54 ~BackingStore(); 55 size()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 67 private: 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