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/IntRect.h>
30#include <wtf/Noncopyable.h>
31
32#if USE(CAIRO)
33#include <WebCore/BackingStoreBackendCairo.h>
34#endif
35
36namespace WebKit {
37
38class ShareableBitmap;
39class UpdateInfo;
40class WebPageProxy;
41
42class BackingStore {
43 WTF_MAKE_FAST_ALLOCATED;
44 WTF_MAKE_NONCOPYABLE(BackingStore);
45
46public:
47 BackingStore(const WebCore::IntSize&, float deviceScaleFactor, WebPageProxy&);
48 ~BackingStore();
49
50 const WebCore::IntSize& size() const { return m_size; }
51 float deviceScaleFactor() const { return m_deviceScaleFactor; }
52
53#if USE(CAIRO)
54 typedef cairo_t* PlatformGraphicsContext;
55#endif
56
57 void paint(PlatformGraphicsContext, const WebCore::IntRect&);
58 void incorporateUpdate(const UpdateInfo&);
59
60private:
61 void incorporateUpdate(ShareableBitmap*, const UpdateInfo&);
62 void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
63
64#if USE(CAIRO)
65 std::unique_ptr<WebCore::BackingStoreBackendCairo> createBackend();
66#endif
67
68 WebCore::IntSize m_size;
69 float m_deviceScaleFactor;
70 WebPageProxy& m_webPageProxy;
71#if USE(CAIRO)
72 std::unique_ptr<WebCore::BackingStoreBackendCairo> m_backend;
73#endif
74};
75
76} // namespace WebKit
77
78#endif // BackingStore_h
79