1/*
2 Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public
6 License as published by the Free Software Foundation; either
7 version 2 of the License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public License
15 along with this library; see the file COPYING.LIB.  If not, write to
16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 Boston, MA 02110-1301, USA.
18 */
19
20#ifndef CoordinatedBackingStore_h
21#define CoordinatedBackingStore_h
22
23#if USE(COORDINATED_GRAPHICS)
24
25#include "TextureMapper.h"
26#include "TextureMapperBackingStore.h"
27#include "TextureMapperTile.h"
28#include <wtf/HashMap.h>
29#include <wtf/HashSet.h>
30
31namespace WebCore {
32
33class CoordinatedSurface;
34
35class CoordinatedBackingStoreTile : public TextureMapperTile {
36public:
37    explicit CoordinatedBackingStoreTile(float scale = 1)
38        : TextureMapperTile(FloatRect())
39        , m_scale(scale)
40    {
41    }
42
43    inline float scale() const { return m_scale; }
44    void swapBuffers(TextureMapper*);
45    void setBackBuffer(const IntRect&, const IntRect&, PassRefPtr<CoordinatedSurface> buffer, const IntPoint&);
46
47private:
48    RefPtr<CoordinatedSurface> m_surface;
49    IntRect m_sourceRect;
50    IntRect m_tileRect;
51    IntPoint m_surfaceOffset;
52    float m_scale;
53};
54
55class CoordinatedBackingStore : public TextureMapperBackingStore {
56public:
57    void createTile(uint32_t tileID, float);
58    void removeTile(uint32_t tileID);
59    void removeAllTiles();
60    void updateTile(uint32_t tileID, const IntRect&, const IntRect&, PassRefPtr<CoordinatedSurface>, const IntPoint&);
61    static PassRefPtr<CoordinatedBackingStore> create() { return adoptRef(new CoordinatedBackingStore); }
62    void commitTileOperations(TextureMapper*);
63    PassRefPtr<BitmapTexture> texture() const;
64    void setSize(const FloatSize&);
65    virtual void paintToTextureMapper(TextureMapper*, const FloatRect&, const TransformationMatrix&, float);
66    virtual void drawBorder(TextureMapper*, const Color&, float borderWidth, const FloatRect&, const TransformationMatrix&) override;
67    virtual void drawRepaintCounter(TextureMapper*, int repaintCount, const Color&, const FloatRect&, const TransformationMatrix&) override;
68
69private:
70    CoordinatedBackingStore()
71        : m_scale(1.)
72    { }
73    void paintTilesToTextureMapper(Vector<TextureMapperTile*>&, TextureMapper*, const TransformationMatrix&, float, const FloatRect&);
74    TransformationMatrix adjustedTransformForRect(const FloatRect&);
75    FloatRect rect() const { return FloatRect(FloatPoint::zero(), m_size); }
76
77    typedef HashMap<uint32_t, CoordinatedBackingStoreTile> CoordinatedBackingStoreTileMap;
78    CoordinatedBackingStoreTileMap m_tiles;
79    HashSet<uint32_t> m_tilesToRemove;
80    // FIXME: m_pendingSize should be removed after the following bug is fixed: https://bugs.webkit.org/show_bug.cgi?id=108294
81    FloatSize m_pendingSize;
82    FloatSize m_size;
83    float m_scale;
84};
85
86} // namespace WebCore
87
88#endif // USE(COORDINATED_GRAPHICS)
89
90#endif // CoordinatedBackingStore_h
91