84 lines
2.0 KiB
C++
84 lines
2.0 KiB
C++
/*
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QAD - Qt ADvanced
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Ivan Pelipenko peri4ko@yandex.ru
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef osm_tile_cache_h
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#define osm_tile_cache_h
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#include "osm_types_p.h"
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#include <QCache>
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#include <QDir>
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#include <QMutex>
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#include <QQueue>
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#include <QThread>
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#include <QWaitCondition>
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class MapView;
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class OSMTileCache: public QThread {
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Q_OBJECT
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public:
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explicit OSMTileCache(MapView * p);
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~OSMTileCache();
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void setMinimumCacheSize(int bytes) {
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fixed_size_b = bytes;
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updateCacheSize();
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}
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void setAdditionalCacheSize(int mb) {
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add_size_b = mb * 1024 * 1024;
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updateCacheSize();
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}
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void tileDownloaded(OSM::TileIndex index, const QPixmap & pixmap);
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OSM::TilePixmap getTile(OSM::TileIndex index, QRectF & rect_src);
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bool isTileFileExists(OSM::TileIndex index) const;
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QString cacheRoot() const { return cache_root; }
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void setCacheRoot(const QString & p);
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private:
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OSM::TilePixmap getTileFromCache(OSM::TileIndex index);
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void updateCacheSize();
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void saveTile(OSM::TilePixmap * tile);
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void writeToDisk(const OSM::TilePixmap & tile);
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void run() override;
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MapView * parent;
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QString cache_root;
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QDir cache_dir;
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QWaitCondition cond;
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QMutex cond_mutex;
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int fixed_size_b = 0, add_size_b = 0;
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QQueue<OSM::TilePixmap> queue;
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QCache<quint64, OSM::TilePixmap> tile_cache;
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public slots:
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private slots:
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signals:
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void tileReady(OSM::TilePixmap);
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};
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#endif
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