1 files changed, 78 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/Tile.h b/Source/WebCore/platform/graphics/Tile.h
new file mode 100644
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+++ b/Source/WebCore/platform/graphics/Tile.h
@@ -0,0 +1,78 @@
+/*
+ Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ 
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+ 
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Library General Public License for more details.
+ 
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB.  If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+ */
+
+#ifndef Tile_h
+#define Tile_h
+
+#if ENABLE(TILED_BACKING_STORE)
+
+#include "IntPoint.h"
+#include "IntPointHash.h"
+#include "IntRect.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+#if PLATFORM(QT)
+QT_BEGIN_NAMESPACE
+class QPixmap;
+class QRegion;
+QT_END_NAMESPACE
+#endif
+
+namespace WebCore {
+    
+class GraphicsContext;
+class TiledBackingStore;
+
+class Tile : public RefCounted<Tile> {
+public:
+    typedef IntPoint Coordinate;
+
+    static PassRefPtr<Tile> create(TiledBackingStore* backingStore, const Coordinate& tileCoordinate) { return adoptRef(new Tile(backingStore, tileCoordinate)); }
+    ~Tile();
+    
+    bool isDirty() const;
+    void invalidate(const IntRect&);
+    void updateBackBuffer();
+    void swapBackBufferToFront();
+    bool isReadyToPaint() const;
+    void paint(GraphicsContext*, const IntRect&);
+
+    const Tile::Coordinate& coordinate() const { return m_coordinate; }
+    const IntRect& rect() const { return m_rect; }
+    
+    static void paintCheckerPattern(GraphicsContext*, const FloatRect&);
+
+private:
+    Tile(TiledBackingStore*, const Coordinate&);
+    
+    TiledBackingStore* m_backingStore;
+    Coordinate m_coordinate;
+    IntRect m_rect;
+
+#if PLATFORM(QT)
+    QPixmap* m_buffer;
+    QPixmap* m_backBuffer;
+    QRegion* m_dirtyRegion;
+#endif
+};
+
+}
+#endif
+#endif