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

  Program:   Visualization Toolkit
  Module:    vtkExtractGrid.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/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 notice for more information.

=========================================================================*/
#ifndef vtkExtractStructuredGridHelper_h
#define vtkExtractStructuredGridHelper_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"

// Forward declarations
class vtkCellData;
class vtkPointData;
class vtkPoints;

namespace vtk
{
namespace detail
{

struct vtkIndexMap;

} // END namespace detail
} // END namespace vtk

class VTKCOMMONDATAMODEL_EXPORT vtkExtractStructuredGridHelper :
  public vtkObject
{
public:
  static vtkExtractStructuredGridHelper *New();
  vtkTypeMacro(vtkExtractStructuredGridHelper,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Get & Set Macros
  vtkGetVector6Macro(OutputWholeExtent,int);


  void Initialize(int voi[6], int wholeExt[6], int sampleRate[3],
                  bool includeBoundary);

  bool IsValid() const;

  int GetSize(const int dim);

  int GetMappedIndex(int dim, int outIdx);

  int GetMappedIndexFromExtentValue(int dim, int outExtVal);

  int GetMappedExtentValue(int dim, int outExtVal);

  int GetMappedExtentValueFromIndex(int dim, int outIdx);

  void ComputeBeginAndEnd(int inExt[6], int voi[6], int begin[3], int end[3]);


  void CopyPointsAndPointData( int inExt[6], int outExt[6],
                    vtkPointData* pd, vtkPoints* inpnts,
                    vtkPointData* outPD, vtkPoints* outpnts,
                    int sampleRate[3] = NULL);


  void CopyCellData(int inExt[6], int outExt[6],
                    vtkCellData* cd, vtkCellData* outCD,
                    int sampleRate[3] = NULL);


  static void GetPartitionedVOI(const int globalVOI[6],
                                const int partitionedExtent[6],
                                const int sampleRate[3],
                                bool includeBoundary,
                                int partitionedVOI[6]);


  static void GetPartitionedOutputExtent(const int globalVOI[6],
                                         const int partitionedVOI[6],
                                         const int outputWholeExtent[6],
                                         const int sampleRate[3],
                                         bool includeBoundary,
                                         int partitionedOutputExtent[6]);

protected:
  vtkExtractStructuredGridHelper();
  ~vtkExtractStructuredGridHelper();

  // Input parameters -- used to reinitialize when data changes.
  int VOI[6];
  int InputWholeExtent[6];
  int SampleRate[3];
  bool IncludeBoundary;

  int OutputWholeExtent[6];
  vtk::detail::vtkIndexMap* IndexMap;

  void Invalidate();

private:
  vtkExtractStructuredGridHelper(const vtkExtractStructuredGridHelper&); // Not implemented.
  void operator=(const vtkExtractStructuredGridHelper&); // Not implemented.
};

#endif /* VTKEXTRACTSTRUCTUREDGRIDHELPER_H_ */