spatmod/imagefilteroverlay.h

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#ifndef  INC_SPATMOD_IMAGEFILTEROVERLAY_H
#define  INC_SPATMOD_IMAGEFILTEROVERLAY_H

#ifndef  INC_SPATMOD_IMAGEFILTER_H
#include <spatmod/imagefilter.h>
#endif

namespace SPATMOD {
namespace IMAGE {

class BUFFER;
class SAMPLEITERATOR;
class SAMPLEITERATOR_CONST;

//=====================================================================================================================

class FILTER_OVERLAY : public FILTER {
   public:
      enum OVERLAPMETHOD {
         OVERLAPMETHOD_First,                
         OVERLAPMETHOD_Last,                 
         OVERLAPMETHOD_Minimum,              
         OVERLAPMETHOD_Maximum,              
         OVERLAPMETHOD_ClosestToSpecified    
         };

      FILTER_OVERLAY (
         STAGE_ARRAY& PreviousStages,        
         bool TakeOwnership,                 
         OVERLAPMETHOD OverlapMethod   = OVERLAPMETHOD_First 
         );

      // Destructor.
      virtual ~FILTER_OVERLAY ();

      ERRVALUE SetPixelTestClosest (
         const PIXEL& PixelTestClosest       
         );

   private:
      #ifndef GENERATING_DOXYGEN_OUTPUT
      typedef FILTER BASECLASS;

      OVERLAPMETHOD m_OverlapMethod;
      PIXEL m_PixelTestClosest;
      double *m_dValueTestClosest;
      SAMPLEITERATOR_CONST *m_itInput;
      SAMPLEITERATOR *m_itOutput;

      void InitPixelTestClosest ();
      ERRVALUE ProcessOverlap (BUFFER& BufferOutput, const BUFFER& BufferInput, INT32 NumColumns, INT32 NumRows) const;

      // STAGE/FILTER overrides.
      virtual ERRVALUE v_Initialize ();
      virtual ERRVALUE v_PullBegin (const SECTION_ITERATOR& iterator);
      virtual ERRVALUE v_PullSubSection (const SECTION& SubSection, BUFFER& buffer);

      // Unimplemented
      FILTER_OVERLAY (const FILTER_OVERLAY&);
      FILTER_OVERLAY& operator= (const FILTER_OVERLAY&);
      #endif // GENERATING_DOXYGEN_OUTPUT

   };

//=====================================================================================================================

}  // End namespace IMAGE
}  // End namespace SPATMOD

#endif   // INC_SPATMOD_IMAGEFILTEROVERLAY_H

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