ImageBand.hpp

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/****************************************************************************\
 *                                 VRVis                                    *
 *                      http://vrvis.sourceforge.net                        *
 *                       (C) 2004 by Alex Loeffler                          *
 *                 mailto:aloeffler@users.sourceforge.net                   *
 ****************************************************************************
 *                                License                                   *
 *                                                                          *
 * This library is free software; you can redistribute it and/or modify it  *
 * under the terms of the GNU Library General Public License as published   *
 * by the Free Software Foundation, version 2.                              *
 *                                                                          *
 * This library is distributed in the hope that it will be useful, but      *
 * WITHOUT ANY WARRANTY; without even the implied warranty of               *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        *
 * Library General Public License for more details.                         *
 *                                                                          *
 * You should have received a copy of the GNU Library General Public        *
 * License along with this library; if not, write to the Free Software      *
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
\****************************************************************************/

#ifndef IMAGEBAND_HPP
#define IMAGEBAND_HPP

#include <vector>
#include "Common.hpp"
#include "RasterData.hpp"

class GDALDataset;
class GDALRasterBand;

namespace vrvis
{

template <class DataTypeT> class Image;

template <class DataTypeT>
class ImageBand : public RasterData
{
  // ================================================================== PUBLIC

  public:

  // ----------------------------------------------- Constructor & Destructor.

  ImageBand(Image<DataTypeT>* pParentImage, const int cBandIndex);
  ~ImageBand(void);

  // ------------------------- Data Loading/Unloading (Implements RasterData).

  void load(void);
  void unload(void);

  // --------------------------------------- Geometry (Implements RasterData).

  void getSizeInPixels(int& rPixelsX, int& rPixelsY) const;

  // ------------------------------------------- Data (Implements RasterData).

  double* getValues(void) const;

  // -------------------------------------------------------------- Accessors.

  DataTypeT getMinValue(void) const;
  DataTypeT getMaxValue(void) const;

  GDALRasterBand* getGDALRasterBand(void);

  // ================================================================= PRIVATE

  private:

  // ---------------------------------------------------- Member Construction.

  static GDALRasterBand* constructRasterBand(Image<DataTypeT>* pParentImage,
                                             const int cBandIndex);

  static DataTypeT constructMinValue(GDALRasterBand* pBand);
  static DataTypeT constructMaxValue(GDALRasterBand* pBand);

  // ---------------------------------------------------------------- Members.

  Image<DataTypeT>* mpParentImage;
  const int mcBandIndex;
  GDALRasterBand* mpGDALRasterBand;
  const DataTypeT mcMinValue;
  const DataTypeT mcMaxValue;
  double* mpValues;
  bool mIsLoaded;
};

}  // End namespace.

// Include template implementation.
#include "ImageBand.inl"

#endif // IMAGEBAND_HPP

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