GrayLevelImage8.h

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#ifndef GrayLevelImage8_H
#define GrayLevelImage8_H

#include "SingleElementImage.h"
#include "ImageSuperClasses.h"
#include "MultiElementImage.h"

namespace puma2 {

typedef unsigned char byte;

class GrayLevelImage8 :
    public SingleElementImage<byte>
{
  public:

    GrayLevelImage8(int xwidth = 0, int height = 0);

    GrayLevelImage8(const GrayLevelImage8 &);

    GrayLevelImage8(int width, int height, GrayLevelImage8 * m, int xo, int yo);

    ~GrayLevelImage8();

    double getElementTypeMinimum() const { return 0; };

    double getElementTypeMaximum() const { return 255; };

    void readFromFile(const char * fileName);
    void writeToFile(const char * fileName) const;

    MultiElementImage<byte,1> & asMultiElementImage();
        // we could initialize alt only, when we need it
        // { if (alt == NULL) alt = new ...; return *alt; }
        // but we would have to store xo, yo, -- another
        // DESIGN OPTION

    operator MultiElementImage<byte,1>& () { return asMultiElementImage(); }

    void operator= (const GrayLevelImage8 & g) {
       SingleElementImage<byte>::operator=(g);
        }

  protected:
    virtual void reset(); 
  private:
    MultiElementImage<byte,1> * alt; 
};

}

#endif