2 * Copyright (C) 2011 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
26 #ifndef BackingStore_h
27 #define BackingStore_h
29 #include <WebCore/IntRect.h>
30 #include <wtf/Noncopyable.h>
31 #include <wtf/PassOwnPtr.h>
34 #include <wtf/RetainPtr.h>
35 #elif PLATFORM(WIN) || PLATFORM(WIN_CAIRO)
36 #include <wtf/OwnPtr.h>
40 #include <QtGui/QPainter>
41 #include <QtGui/QPixmap>
44 #if USE(CAIRO) && !PLATFORM(WIN_CAIRO)
45 #include <RefPtrCairo.h>
46 #include <WebCore/WidgetBackingStore.h>
51 class ShareableBitmap;
56 WTF_MAKE_NONCOPYABLE(BackingStore);
59 static PassOwnPtr<BackingStore> create(const WebCore::IntSize&, float deviceScaleFactor, WebPageProxy*);
62 const WebCore::IntSize& size() const { return m_size; }
63 float deviceScaleFactor() const { return m_deviceScaleFactor; }
66 typedef CGContextRef PlatformGraphicsContext;
68 typedef HDC PlatformGraphicsContext;
70 typedef QPainter* PlatformGraphicsContext;
72 typedef cairo_t* PlatformGraphicsContext;
75 void paint(PlatformGraphicsContext, const WebCore::IntRect&);
76 void incorporateUpdate(const UpdateInfo&);
79 BackingStore(const WebCore::IntSize&, float deviceScaleFactor, WebPageProxy*);
81 void incorporateUpdate(ShareableBitmap*, const UpdateInfo&);
82 void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
84 WebCore::IntSize m_size;
85 float m_deviceScaleFactor;
86 WebPageProxy* m_webPageProxy;
89 CGContextRef backingStoreContext();
91 void performWithScrolledRectTransform(const WebCore::IntRect&, void (^)(const WebCore::IntRect&, const WebCore::IntSize&));
92 void resetScrolledRect();
94 RetainPtr<CGLayerRef> m_cgLayer;
95 RetainPtr<CGContextRef> m_bitmapContext;
97 // The rectange that was scrolled most recently.
98 WebCore::IntRect m_scrolledRect;
100 // Contents of m_scrolledRect are offset by this amount (and wrapped around) with respect to
101 // their original location.
102 WebCore::IntSize m_scrolledRectOffset;
103 #elif PLATFORM(WIN) || PLATFORM(WIN_CAIRO)
104 OwnPtr<HBITMAP> m_bitmap;
108 OwnPtr<WebCore::WidgetBackingStore> m_backingStore;
112 } // namespace WebKit
114 #endif // BackingStore_h