1/*
2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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 TiledDrawingAreaTile_h
27#define TiledDrawingAreaTile_h
28
29#include "IntPoint.h"
30#include "IntPointHash.h"
31#include "IntRect.h"
32#include "GraphicsContext.h"
33#include <wtf/PassRefPtr.h>
34#include <wtf/RefCounted.h>
35
36#if PLATFORM(QT)
37#include <QPixmap>
38#include <QRegion>
39#endif
40
41namespace WebKit {
42
43class TiledDrawingAreaProxy;
44class UpdateChunk;
45
46class TiledDrawingAreaTile : public RefCounted<TiledDrawingAreaTile> {
47public:
48    typedef WebCore::IntPoint Coordinate;
49
50    static PassRefPtr<TiledDrawingAreaTile> create(TiledDrawingAreaProxy* proxy, const Coordinate& tileCoordinate) { return adoptRef(new TiledDrawingAreaTile(proxy, tileCoordinate)); }
51    ~TiledDrawingAreaTile();
52
53    bool isDirty() const;
54    void invalidate(const WebCore::IntRect&);
55    void updateBackBuffer();
56    bool hasReadyBackBuffer() const;
57    void swapBackBufferToFront();
58    bool isReadyToPaint() const;
59    void paint(WebCore::GraphicsContext*, const WebCore::IntRect&);
60    bool hasBackBufferUpdatePending() const { return m_hasUpdatePending; }
61
62    const TiledDrawingAreaTile::Coordinate& coordinate() const { return m_coordinate; }
63    const WebCore::IntRect& rect() const { return m_rect; }
64    void resize(const WebCore::IntSize&);
65
66    void updateFromChunk(UpdateChunk* updateChunk, float);
67
68    int ID() const { return m_ID; }
69
70private:
71    TiledDrawingAreaTile(TiledDrawingAreaProxy* proxy, const TiledDrawingAreaTile::Coordinate& tileCoordinate);
72
73    TiledDrawingAreaProxy* m_proxy;
74    Coordinate m_coordinate;
75    WebCore::IntRect m_rect;
76
77    int m_ID;
78    bool m_hasUpdatePending;
79
80#if PLATFORM(QT)
81    QPixmap m_buffer;
82    QPixmap m_backBuffer;
83    QRegion m_dirtyRegion;
84#endif
85};
86
87}
88
89#endif
90