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

  Program:   Visualization Toolkit
  Module:    vtkExtentSplitter.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 vtkExtentSplitter_h
#define vtkExtentSplitter_h

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

class vtkExtentSplitterInternals;

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


  void AddExtentSource(int id, int priority, int x0, int x1,
                       int y0, int y1, int z0, int z1);
  void AddExtentSource(int id, int priority, int* extent);
  void RemoveExtentSource(int id);
  void RemoveAllExtentSources();


  void AddExtent(int x0, int x1, int y0, int y1, int z0, int z1);
  void AddExtent(int* extent);

  int ComputeSubExtents();

  int GetNumberOfSubExtents();


  int* GetSubExtent(int index);
  void GetSubExtent(int index, int* extent);

  int GetSubExtentSource(int index);


  vtkGetMacro(PointMode, int);
  vtkSetMacro(PointMode, int);
  vtkBooleanMacro(PointMode, int);

protected:
  vtkExtentSplitter();
  ~vtkExtentSplitter();

  // Internal utility methods.
  void SplitExtent(int* extent, int* subextent);
  int IntersectExtents(const int* extent1, const int* extent2, int* result);
  int Min(int a, int b);
  int Max(int a, int b);

  // Internal implementation data.
  vtkExtentSplitterInternals* Internal;

  // On if reading only all points (but not always all cells) is
  // necessary.  Used for reading volumes of planar slices storing
  // only point data.
  int PointMode;

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

#endif