1/*
2 * Copyright (C) 2012 Google 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'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#ifndef ContentLayerDelegate_h
26#define ContentLayerDelegate_h
27
28#include "platform/PlatformExport.h"
29#include "public/platform/WebContentLayerClient.h"
30#include "wtf/Noncopyable.h"
31#include "wtf/PassOwnPtr.h"
32
33class SkCanvas;
34
35namespace blink {
36
37class GraphicsContext;
38class IntRect;
39
40class PLATFORM_EXPORT GraphicsContextPainter {
41public:
42    virtual void paint(GraphicsContext&, const IntRect& clip) = 0;
43
44protected:
45    virtual ~GraphicsContextPainter() { }
46};
47
48class PLATFORM_EXPORT ContentLayerDelegate : public WebContentLayerClient {
49    WTF_MAKE_NONCOPYABLE(ContentLayerDelegate);
50
51public:
52    explicit ContentLayerDelegate(GraphicsContextPainter*);
53    virtual ~ContentLayerDelegate();
54
55    // When we know everything painted through this delegate will be opaque, allow for optimizations to take place.
56    void setOpaque(bool opaque)
57    {
58        m_opaque = opaque;
59    }
60
61    // WebContentLayerClient implementation.
62    virtual void paintContents(SkCanvas*, const WebRect& clip, bool canPaintLCDText, WebContentLayerClient::GraphicsContextStatus = GraphicsContextEnabled) OVERRIDE;
63
64private:
65    GraphicsContextPainter* m_painter;
66    bool m_opaque;
67};
68
69} // namespace blink
70
71#endif // ContentLayerDelegate_h
72