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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 
41 namespace WebKit {
42 
43 class TiledDrawingAreaProxy;
44 class UpdateChunk;
45 
46 class TiledDrawingAreaTile : public RefCounted<TiledDrawingAreaTile> {
47 public:
48     typedef WebCore::IntPoint Coordinate;
49 
create(TiledDrawingAreaProxy * proxy,const Coordinate & tileCoordinate)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&);
hasBackBufferUpdatePending()60     bool hasBackBufferUpdatePending() const { return m_hasUpdatePending; }
61 
coordinate()62     const TiledDrawingAreaTile::Coordinate& coordinate() const { return m_coordinate; }
rect()63     const WebCore::IntRect& rect() const { return m_rect; }
64     void resize(const WebCore::IntSize&);
65 
66     void updateFromChunk(UpdateChunk* updateChunk, float);
67 
ID()68     int ID() const { return m_ID; }
69 
70 private:
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