1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef BackingStore_h
#define BackingStore_h
#include <WebCore/IntSize.h>
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#if PLATFORM(MAC)
#include <wtf/RetainPtr.h>
#endif
namespace WebCore {
class IntRect;
}
namespace WebKit {
class ShareableBitmap;
class UpdateInfo;
class WebPageProxy;
class BackingStore {
WTF_MAKE_NONCOPYABLE(BackingStore);
public:
static PassOwnPtr<BackingStore> create(const WebCore::IntSize&, WebPageProxy*);
~BackingStore();
const WebCore::IntSize& size() const { return m_size; }
#if PLATFORM(MAC)
typedef CGContextRef PlatformGraphicsContext;
#endif
void paint(PlatformGraphicsContext, const WebCore::IntRect&);
void incorporateUpdate(const UpdateInfo&);
private:
BackingStore(const WebCore::IntSize&, WebPageProxy*);
void incorporateUpdate(ShareableBitmap*, const UpdateInfo&);
void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
WebCore::IntSize m_size;
WebPageProxy* m_webPageProxy;
double m_latestUpdateTimestamp;
#if PLATFORM(MAC)
CGContextRef backingStoreContext();
RetainPtr<CGLayerRef> m_cgLayer;
RetainPtr<CGContextRef> m_bitmapContext;
#endif
};
} // namespace WebKit
#endif // BackingStore_h
|
