qabstractgeotilecache_p.h

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// Copyright (C) 2015 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QABSTRACTGEOTILECACHE_P_H
#define QABSTRACTGEOTILECACHE_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/private/qlocationglobal_p.h>
 
#include <QtCore/QSharedPointer>
#include <QtCore/QObject>
#include <QtCore/QString>
#include <QtGui/QImage>
 
#include "qgeotilespec_p.h"
 
 
QT_BEGIN_NAMESPACE
 
class QGeoMappingManager;
class QGeoMappingManagerEngine;
 
class QGeoTile;
class QAbstractGeoTileCache;
 
class QThread;
 
/* This is also used in the mapgeometry */
struct QGeoTileTexture
{
    QGeoTileSpec spec;
    QImage image;
    bool textureBound = false;
};
 
class Q_LOCATION_PRIVATE_EXPORT QAbstractGeoTileCache : public QObject
{
    Q_OBJECT
public:
    enum CostStrategy {
        Unitary,
        ByteSize
    };
 
    enum CacheArea {
        DiskCache = 0x01,
        MemoryCache = 0x02,
        AllCaches = 0xFF
    };
    Q_DECLARE_FLAGS(CacheAreas, CacheArea)
 
    virtual ~QAbstractGeoTileCache();
 
    virtual void setMaxDiskUsage(int diskUsage);
    virtual int maxDiskUsage() const;
    virtual int diskUsage() const;
 
    virtual void setMaxMemoryUsage(int memoryUsage);
    virtual int maxMemoryUsage() const;
    virtual int memoryUsage() const;
 
    virtual void setMinTextureUsage(int textureUsage) = 0;
    virtual void setExtraTextureUsage(int textureUsage) = 0;
    virtual int maxTextureUsage() const = 0;
    virtual int minTextureUsage() const = 0;
    virtual int textureUsage() const = 0;
    virtual void clearAll() = 0;
    virtual void setCostStrategyDisk(CostStrategy costStrategy) = 0;
    virtual CostStrategy costStrategyDisk() const = 0;
    virtual void setCostStrategyMemory(CostStrategy costStrategy) = 0;
    virtual CostStrategy costStrategyMemory() const = 0;
    virtual void setCostStrategyTexture(CostStrategy costStrategy) = 0;
    virtual CostStrategy costStrategyTexture() const = 0;
 
    virtual QSharedPointer<QGeoTileTexture> get(const QGeoTileSpec &spec) = 0;
 
    virtual void insert(const QGeoTileSpec &spec,
                const QByteArray &bytes,
                const QString &format,
                QAbstractGeoTileCache::CacheAreas areas = QAbstractGeoTileCache::AllCaches) = 0;
    virtual void handleError(const QGeoTileSpec &spec, const QString &errorString);
    virtual void init() = 0;
 
    static QString baseCacheDirectory();
    static QString baseLocationCacheDirectory();
 
protected:
    QAbstractGeoTileCache(QObject *parent = nullptr);
    virtual void printStats() = 0;
 
    friend class QGeoTiledMappingManagerEngine;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS(QAbstractGeoTileCache::CacheAreas)
 
QT_END_NAMESPACE
 
#endif // QABSTRACTGEOTILECACHE_P_H