src/data/dem.h

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