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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef TILECACHE_H
#define TILECACHE_H
#include "qmobilityglobal.h"
#include <QObject>
#include <QCache>
#include <QSet>
class QGeoMappingManager;
class TileSpec;
class Tile;
class TileDisk;
class TileMemory;
class TileTexture;
class QGLSceneNode;
class QPixmap;
class QThread;
class Q_LOCATION_EXPORT TileCache : public QObject
{
Q_OBJECT
public:
TileCache(const QString &directory = QString(), QObject *parent = 0);
~TileCache();
void setMappingManager(QGeoMappingManager *manager);
void setMaxDiskUsage(int diskUsage);
int maxDiskUsage() const;
int diskUsage() const;
void setMaxMemoryUsage(int memoryUsage);
int maxMemoryUsage() const;
int memoryUsage() const;
void setMaxTextureUsage(int textureUsage);
int maxTextureUsage() const;
int textureUsage() const;
void GLContextAvailable(QGLSceneNode *parentNode);
bool contains(const TileSpec &spec) const;
Tile get(const TileSpec &spec);
void update(const TileSpec &spec, const Tile &tile);
void prefetch(const QList<TileSpec> &tiles);
void evictFromDiskCache(TileDisk *td);
void evictFromMemoryCache(TileMemory *tm);
void evictFromTextureCache(TileTexture *tt);
private slots:
void insert(const TileSpec &spec, const QByteArray &bytes);
void handleError(const TileSpec &spec, const QString &errorString);
signals:
void beginPrefetch(const QList<TileSpec> &tiles);
void tileFetched(const TileSpec &spec);
void prefetchingFinished();
private:
void loadTiles();
TileDisk* addToDiskCache(const TileSpec &spec, const QString &filename);
TileMemory* addToMemoryCache(const TileSpec &spec, const QPixmap &pixmap);
TileTexture* addToTextureCache(const TileSpec &spec, const QPixmap &pixmap);
static QString tileSpecToFilename(const TileSpec &spec, const QString &directory);
static TileSpec filenameToTileSpec(const QString &filename);
QString directory_;
int diskSize_;
int memorySize_;
int textureSize_;
QSet<TileSpec> keys_;
QCache<TileSpec, TileDisk > diskCache_;
QCache<TileSpec, TileMemory > memoryCache_;
QCache<TileSpec, TileTexture > textureCache_;
QList<Tile> cleanupList_;
QGeoMappingManager *manager_;
};
#endif // TILECACHE_H
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