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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QGEOTILECACHE_P_H
#define QGEOTILECACHE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtLocation/qlocationglobal.h>
#include <QObject>
#include <QCache>
#include "qcache3q_p.h"
#include <QSet>
#include <QMutex>
#include <QTimer>
#include "qgeotilespec_p.h"
#include "qgeotiledmappingmanagerengine_p.h"
#include <QImage>
QT_BEGIN_NAMESPACE
class QGeoMappingManager;
class QGeoTile;
class QGeoCachedTileMemory;
class QGeoTileCache;
class QPixmap;
class QThread;
/* This would be internal to qgeotilecache.cpp except that the eviction
* policy can't be defined without it being concrete here */
class QGeoCachedTileDisk
{
public:
~QGeoCachedTileDisk();
QGeoTileSpec spec;
QString filename;
QString format;
QGeoTileCache *cache;
};
/* This is also used in the mapgeometry */
class Q_LOCATION_EXPORT QGeoTileTexture
{
public:
QGeoTileTexture();
~QGeoTileTexture();
QGeoTileSpec spec;
QImage image;
bool textureBound;
};
/* Custom eviction policy for the disk cache, to avoid deleting all the files
* when the application closes */
class QCache3QTileEvictionPolicy : public QCache3QDefaultEvictionPolicy<QGeoTileSpec,QGeoCachedTileDisk>
{
protected:
void aboutToBeRemoved(const QGeoTileSpec &key, QSharedPointer<QGeoCachedTileDisk> obj);
void aboutToBeEvicted(const QGeoTileSpec &key, QSharedPointer<QGeoCachedTileDisk> obj);
};
class Q_LOCATION_EXPORT QGeoTileCache : public QObject
{
Q_OBJECT
public:
QGeoTileCache(const QString &directory = QString(), QObject *parent = 0);
~QGeoTileCache();
void setMaxDiskUsage(int diskUsage);
int maxDiskUsage() const;
int diskUsage() const;
void setMaxMemoryUsage(int memoryUsage);
int maxMemoryUsage() const;
int memoryUsage() const;
void setMinTextureUsage(int textureUsage);
void setExtraTextureUsage(int textureUsage);
int maxTextureUsage() const;
int minTextureUsage() const;
int textureUsage() const;
QSharedPointer<QGeoTileTexture> get(const QGeoTileSpec &spec);
QString directory() const;
// can be called without a specific tileCache pointer
static void evictFromDiskCache(QGeoCachedTileDisk *td);
static void evictFromMemoryCache(QGeoCachedTileMemory *tm);
void insert(const QGeoTileSpec &spec,
const QByteArray &bytes,
const QString &format,
QGeoTiledMappingManagerEngine::CacheAreas areas = QGeoTiledMappingManagerEngine::AllCaches);
void handleError(const QGeoTileSpec &spec, const QString &errorString);
public Q_SLOTS:
void printStats();
private:
void loadTiles();
QSharedPointer<QGeoCachedTileDisk> addToDiskCache(const QGeoTileSpec &spec, const QString &filename);
QSharedPointer<QGeoCachedTileMemory> addToMemoryCache(const QGeoTileSpec &spec, const QByteArray &bytes, const QString &format);
QSharedPointer<QGeoTileTexture> addToTextureCache(const QGeoTileSpec &spec, const QPixmap &pixmap);
static QString tileSpecToFilename(const QGeoTileSpec &spec, const QString &format, const QString &directory);
static QGeoTileSpec filenameToTileSpec(const QString &filename);
QString directory_;
QCache3Q<QGeoTileSpec, QGeoCachedTileDisk, QCache3QTileEvictionPolicy > diskCache_;
QCache3Q<QGeoTileSpec, QGeoCachedTileMemory > memoryCache_;
QCache3Q<QGeoTileSpec, QGeoTileTexture > textureCache_;
int minTextureUsage_;
int extraTextureUsage_;
};
QT_END_NAMESPACE
#endif // QGEOTILECACHE_P_H
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