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63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
#ifndef GEOTIFF_H
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#define GEOTIFF_H
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#include <QMap>
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#include <QList>
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#include "transform.h"
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#include "projection.h"
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class TIFFFile;
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class GCS;
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class GeoTIFF
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{
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public:
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GeoTIFF(const QString &path);
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bool isValid() const {return _projection.isValid() && _transform.isValid();}
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const QString &errorString() const {return _errorString;}
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const Projection &projection() const {return _projection;}
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const Transform &transform() const {return _transform;}
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private:
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union Value {
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quint16 SHORT;
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double DOUBLE;
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};
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struct Ctx {
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quint32 scale;
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quint32 tiepoints;
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quint32 tiepointCount;
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quint32 matrix;
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quint32 keys;
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quint32 values;
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Ctx() : scale(0), tiepoints(0), tiepointCount(0), matrix(0), keys(0),
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values(0) {}
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};
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bool readEntry(TIFFFile &file, Ctx &ctx) const;
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bool readIFD(TIFFFile &file, quint32 offset, Ctx &ctx) const;
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bool readScale(TIFFFile &file, quint32 offset, PointD &scale) const;
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bool readTiepoints(TIFFFile &file, quint32 offset, quint32 count,
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QList<ReferencePoint> &points) const;
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bool readMatrix(TIFFFile &file, quint32 offset, double matrix[16]) const;
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bool readKeys(TIFFFile &file, Ctx &ctx, QMap<quint16, Value> &kv) const;
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bool readGeoValue(TIFFFile &file, quint32 offset, quint16 index,
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double &val) const;
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GCS geographicCS(QMap<quint16, Value> &kv);
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Projection::Method coordinateTransformation(QMap<quint16, Value> &kv);
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bool geographicModel(QMap<quint16, Value> &kv);
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bool projectedModel(QMap<quint16, Value> &kv);
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Transform _transform;
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Projection _projection;
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QString _errorString;
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};
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#endif // GEOTIFF_H
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