itkWatershedBoundary.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkWatershedBoundary.h,v $
  Language:  C++
  Date:      $Date: 2002/09/12 01:13:11 $
  Version:   $Revision: 1.10 $

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkWatershedBoundary_h
#define __itkWatershedBoundary_h

#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif

#include <list>
#include <vector>
#include "itkImage.h"
#include "itkObjectFactory.h"
#include "itkDataObject.h"
#include "itkProcessObject.h"
#include "itk_hash_map.h"

namespace itk
{
namespace watershed
{
template <class TScalarType, unsigned int TDimension>
class Boundary : public DataObject
{
public:
  itkStaticConstMacro(Dimension, unsigned int, TDimension);

  typedef std::pair<unsigned, unsigned> IndexType;
  typedef typename Image<unsigned long, TDimension>::IndexType ImageIndexType;
  typedef TScalarType ScalarType;

  struct face_pixel_t
  {
    short flow;

    unsigned long label;
  };

  struct flat_region_t
  {
    std::list<unsigned long> offset_list;

    ScalarType bounds_min;

    unsigned long min_label;

    ScalarType value;
  };
  
  typedef Image<face_pixel_t, TDimension> face_t;

  typedef itk::hash_map<unsigned long, flat_region_t,
                        itk::hash<unsigned long> > flat_hash_t;
  typedef typename flat_hash_t::value_type FlatHashValueType;
  
  typedef Boundary Self;
  typedef DataObject Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;
  itkNewMacro(Self);
  itkTypeMacro(Boundary, DataObject);

  typedef typename face_t::Pointer FacePointer;

  
  FacePointer GetFace(const IndexType &idx)
    {      return this->GetFace(idx.first, idx.second);    }

  FacePointer GetFace(unsigned dimension, unsigned highlow)
    {
      if (highlow == 0) return m_Faces[dimension].first;
      else return m_Faces[dimension].second;
    }

  void SetFace(FacePointer f, const IndexType &idx)
    { this->SetFace(f, idx.first, idx.second); }
  
  void SetFace(FacePointer f, unsigned dimension, unsigned highlow)
    {
      if (highlow ==0 ) m_Faces[dimension].first = f;
      else m_Faces[dimension].second = f;
      this->Modified();
    }
  
  flat_hash_t *GetFlatHash(const IndexType &idx)
    { return this->GetFlatHash(idx.first, idx.second); }
  flat_hash_t *GetFlatHash(unsigned dimension, unsigned highlow)
    {
      if (highlow == 0) return &(m_FlatHashes[dimension].first);
      else return &(m_FlatHashes[dimension].second);
    }
  void SetFlatHash(flat_hash_t & l, const IndexType &idx)
    { this->SetFlatHash(l, idx.first, idx.second); }  
  void SetFlatHash(flat_hash_t & l, unsigned dimension,
                             unsigned highlow)
    {
      if (highlow ==0 ) m_FlatHashes[dimension].first = l;
      else m_FlatHashes[dimension].second = l;
      this->Modified();
    }

  void SetValid(bool & l, const IndexType &idx)
    { this->SetValid(l, idx.first, idx.second); }  
  void SetValid(bool b, unsigned dimension,
                             unsigned highlow)
    {
      if (highlow ==0 ) m_Valid[dimension].first = b;
      else m_Valid[dimension].second = b;
      this->Modified();
    }
  bool GetValid(const IndexType &idx) const
    { return this->GetValid(idx.first, idx.second); }
  bool GetValid(unsigned dimension, unsigned highlow) const
    {
      if (highlow == 0) return m_Valid[dimension].first;
      else return m_Valid[dimension].second;
    }

protected:
  Boundary();
  virtual ~Boundary() {}
  Boundary(const Self&) {}
  void operator=(const Self&) {}
  void PrintSelf(std::ostream& os, Indent indent) const;

  std::vector<std::pair<FacePointer, FacePointer> > m_Faces;

  std::vector<std::pair<flat_hash_t, flat_hash_t> >  m_FlatHashes;

  std::vector<std::pair<bool,bool> >  m_Valid;

  void UpdateOutputInformation();
  bool VerifyRequestedRegion() { return true; }
  void SetRequestedRegionToLargestPossibleRegion () {}
  bool RequestedRegionIsOutsideOfTheBufferedRegion () { return false; }
  void SetRequestedRegion (DataObject *) {}

};
}// end namespace watershed
}// end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkWatershedBoundary.txx"
#endif

#endif

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