src/data/dem.h

   1 #ifndef DEM_H
   2 #define DEM_H
   3
   4 #include <QString>
   5 #include <QCache>
   6 #include <QByteArray>
   7 #include <QMutex>
   8 #include "common/hash.h"
   9 #include "area.h"
  10
  11 class Coordinates;
  12
  13 class DEM
  14 {
  15 public:
  16         class Tile {
  17         public:
  18                 Tile(int lon, int lat) : _lon(lon), _lat(lat) {}
  19
  20                 int lon() const {return _lon;}
  21                 int lat() const {return _lat;}
  22
  23                 QString lonStr() const;
  24                 QString latStr() const;
  25                 QString baseName() const;
  26
  27                 bool operator==(const Tile &other) const
  28                 {
  29                         return (_lon == other._lon && _lat == other._lat);
  30                 }
  31
  32         private:
  33                 int _lon, _lat;
  34         };
  35
  36         static void setCacheSize(int size);
  37         static void setDir(const QString &path);
  38         static void clearCache();
  39
  40         static double elevation(const Coordinates &c);
  41         static void lock() {_lock.lock();}
  42         static void unlock() {_lock.unlock();}
  43
  44         static QList<Area> tiles();
  45
  46 private:
  47         typedef QCache<DEM::Tile, QByteArray> TileCache;
  48
  49         static QString fileName(const QString &baseName);
  50
  51         static QString _dir;
  52         static TileCache _data;
  53         static QMutex _lock;
  54 };
  55
  56 inline HASH_T qHash(const DEM::Tile &tile)
  57 {
  58         return (qHash(tile.lon()) ^ qHash(tile.lat()));
  59 }
  60
  61 #ifndef QT_NO_DEBUG
  62 QDebug operator<<(QDebug dbg, const DEM::Tile &tile);
  63 #endif // QT_NO_DEBUG
  64
  65 #endif // DEM_H