src/map/geotiff.h

   1 #ifndef GEOTIFF_H
   2 #define GEOTIFF_H
   3
   4 #include <QMap>
   5 #include <QList>
   6 #include "transform.h"
   7 #include "projection.h"
   8
   9 class TIFFFile;
  10 class GCS;
  11
  12 class GeoTIFF
  13 {
  14 public:
  15         GeoTIFF(const QString &path);
  16
  17         bool isValid() const {return _projection.isValid() && _transform.isValid();}
  18         const QString &errorString() const {return _errorString;}
  19
  20         const Projection &projection() const {return _projection;}
  21         const Transform &transform() const {return _transform;}
  22
  23 private:
  24         union Value {
  25                 quint16 SHORT;
  26                 double DOUBLE;
  27         };
  28
  29         struct Ctx {
  30                 quint32 scale;
  31                 quint32 tiepoints;
  32                 quint32 tiepointCount;
  33                 quint32 matrix;
  34                 quint32 keys;
  35                 quint32 values;
  36
  37                 Ctx() : scale(0), tiepoints(0), tiepointCount(0), matrix(0), keys(0),
  38                   values(0) {}
  39         };
  40
  41         bool readEntry(TIFFFile &file, Ctx &ctx) const;
  42         bool readIFD(TIFFFile &file, quint32 &offset, Ctx &ctx) const;
  43         bool readScale(TIFFFile &file, quint32 offset, PointD &scale) const;
  44         bool readTiepoints(TIFFFile &file, quint32 offset, quint32 count,
  45           QList<ReferencePoint> &points) const;
  46         bool readMatrix(TIFFFile &file, quint32 offset, double matrix[16]) const;
  47         bool readKeys(TIFFFile &file, Ctx &ctx, QMap<quint16, Value> &kv) const;
  48         bool readGeoValue(TIFFFile &file, quint32 offset, quint16 index,
  49           double &val) const;
  50
  51         const GCS *gcs(QMap<quint16, Value> &kv);
  52         Projection::Method method(QMap<quint16, Value> &kv);
  53         bool geographicModel(QMap<quint16, Value> &kv);
  54         bool projectedModel(QMap<quint16, Value> &kv);
  55
  56         Transform _transform;
  57         Projection _projection;
  58
  59         QString _errorString;
  60 };
  61
  62 #endif // GEOTIFF_H