1 /* 2 Copyright (C) 2010 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 Tile_h 21 #define Tile_h 22 23 #if ENABLE(TILED_BACKING_STORE) 24 25 #include "IntPoint.h" 26 #include "IntPointHash.h" 27 #include "IntRect.h" 28 #include <wtf/PassRefPtr.h> 29 #include <wtf/RefCounted.h> 30 31 #if PLATFORM(QT) 32 QT_BEGIN_NAMESPACE 33 class QPixmap; 34 class QRegion; 35 QT_END_NAMESPACE 36 #endif 37 38 namespace WebCore { 39 40 class GraphicsContext; 41 class TiledBackingStore; 42 43 class Tile : public RefCounted<Tile> { 44 public: 45 typedef IntPoint Coordinate; 46 create(TiledBackingStore * backingStore,const Coordinate & tileCoordinate)47 static PassRefPtr<Tile> create(TiledBackingStore* backingStore, const Coordinate& tileCoordinate) { return adoptRef(new Tile(backingStore, tileCoordinate)); } 48 ~Tile(); 49 50 bool isDirty() const; 51 void invalidate(const IntRect&); 52 Vector<IntRect> updateBackBuffer(); 53 void swapBackBufferToFront(); 54 bool isReadyToPaint() const; 55 void paint(GraphicsContext*, const IntRect&); 56 coordinate()57 const Tile::Coordinate& coordinate() const { return m_coordinate; } rect()58 const IntRect& rect() const { return m_rect; } 59 60 static void paintCheckerPattern(GraphicsContext*, const FloatRect&); 61 62 private: 63 Tile(TiledBackingStore*, const Coordinate&); 64 65 TiledBackingStore* m_backingStore; 66 Coordinate m_coordinate; 67 IntRect m_rect; 68 69 #if PLATFORM(QT) 70 QPixmap* m_buffer; 71 QPixmap* m_backBuffer; 72 QRegion* m_dirtyRegion; 73 #endif 74 }; 75 76 } 77 #endif 78 #endif 79