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// Copyright (C) 2022 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 QGEOFILETILECACHE_P_H
#define QGEOFILETILECACHE_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 <QObject>
#include "qcache3q_p.h"
#include "qabstractgeotilecache_p.h"
QT_BEGIN_NAMESPACE
class QGeoMappingManager;
class QGeoTile;
class QGeoCachedTileMemory;
class QGeoFileTileCache;
class QImage;
/* This would be internal to qgeofiletilecache.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;
QGeoFileTileCache *cache = nullptr;
};
/* Custom eviction policy for the disk cache, to avoid deleting all the files
* when the application closes */
class Q_LOCATION_EXPORT 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 QGeoFileTileCache : public QAbstractGeoTileCache
{
Q_OBJECT
public:
QGeoFileTileCache(const QString &directory = QString(), QObject *parent = nullptr);
~QGeoFileTileCache();
void setMaxDiskUsage(int diskUsage) override;
int maxDiskUsage() const override;
int diskUsage() const override;
void setMaxMemoryUsage(int memoryUsage) override;
int maxMemoryUsage() const override;
int memoryUsage() const override;
void setMinTextureUsage(int textureUsage) override;
void setExtraTextureUsage(int textureUsage) override;
int maxTextureUsage() const override;
int minTextureUsage() const override;
int textureUsage() const override;
void clearAll() override;
void clearMapId(int mapId);
void setCostStrategyDisk(CostStrategy costStrategy) override;
CostStrategy costStrategyDisk() const override;
void setCostStrategyMemory(CostStrategy costStrategy) override;
CostStrategy costStrategyMemory() const override;
void setCostStrategyTexture(CostStrategy costStrategy) override;
CostStrategy costStrategyTexture() const override;
QSharedPointer<QGeoTileTexture> get(const QGeoTileSpec &spec) override;
// 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,
QAbstractGeoTileCache::CacheAreas areas = QAbstractGeoTileCache::AllCaches) override;
static QString tileSpecToFilenameDefault(const QGeoTileSpec &spec, const QString &format, const QString &directory);
static QGeoTileSpec filenameToTileSpecDefault(const QString &filename);
protected:
void init() override;
void printStats() override;
void loadTiles();
QString directory() const;
QSharedPointer<QGeoCachedTileDisk> addToDiskCache(const QGeoTileSpec &spec, const QString &filename);
bool addToDiskCache(const QGeoTileSpec &spec, const QString &filename, const QByteArray &bytes);
void addToMemoryCache(const QGeoTileSpec &spec, const QByteArray &bytes, const QString &format);
QSharedPointer<QGeoTileTexture> addToTextureCache(const QGeoTileSpec &spec, const QImage &image);
QSharedPointer<QGeoTileTexture> getFromMemory(const QGeoTileSpec &spec);
QSharedPointer<QGeoTileTexture> getFromDisk(const QGeoTileSpec &spec);
virtual bool isTileBogus(const QByteArray &bytes) const;
virtual QString tileSpecToFilename(const QGeoTileSpec &spec, const QString &format, const QString &directory) const;
virtual QGeoTileSpec filenameToTileSpec(const QString &filename) const;
QCache3Q<QGeoTileSpec, QGeoCachedTileDisk, QCache3QTileEvictionPolicy> diskCache_;
QCache3Q<QGeoTileSpec, QGeoCachedTileMemory> memoryCache_;
QCache3Q<QGeoTileSpec, QGeoTileTexture> textureCache_;
QString directory_;
int minTextureUsage_ = 0;
int extraTextureUsage_ = 0;
CostStrategy costStrategyDisk_ = ByteSize;
CostStrategy costStrategyMemory_ = ByteSize;
CostStrategy costStrategyTexture_ = ByteSize;
bool isDiskCostSet_ = false;
bool isMemoryCostSet_ = false;
bool isTextureCostSet_ = false;
};
QT_END_NAMESPACE
#endif // QGEOFILETILECACHE_P_H
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