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

  Program:   Visualization Toolkit
  Module:    vtkSMPContourGrid.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.

=========================================================================*/
/**
 * @class   vtkSMPContourGrid
 * @brief   a subclass of vtkContourGrid that works in parallel
 * vtkSMPContourGrid performs the same functionaliy as vtkContourGrid but does
 * it using multiple threads. This will probably be merged with vtkContourGrid
 * in the future.
*/

#ifndef vtkSMPContourGrid_h
#define vtkSMPContourGrid_h

#include "vtkFiltersSMPModule.h" // For export macro
#include "vtkContourGrid.h"

class VTKFILTERSSMP_EXPORT vtkSMPContourGrid : public vtkContourGrid
{
public:
  vtkTypeMacro(vtkSMPContourGrid,vtkContourGrid);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  /**
   * Constructor.
   */
  static vtkSMPContourGrid *New();

  //@{
  /**
   * If MergePieces is true (default), this filter will merge all
   * pieces generated by processing the input with multiple threads.
   * The output will be a vtkPolyData. Note that this has a slight overhead
   * which becomes more significant as the number of threads used grows.
   * If MergePieces is false, this filter will generate a vtkMultiBlock
   * of vtkPolyData where the number of pieces will be equal to the number
   * of threads used.
   */
  vtkSetMacro(MergePieces, bool);
  vtkGetMacro(MergePieces, bool);
  vtkBooleanMacro(MergePieces, bool);
  //@}

  /**
   * Please see vtkAlgorithm for details.
   */
  int ProcessRequest(vtkInformation*,
                             vtkInformationVector**,
                             vtkInformationVector*) override;

protected:
  vtkSMPContourGrid();
  ~vtkSMPContourGrid() override;

  virtual int RequestDataObject(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;

  int FillOutputPortInformation(int port, vtkInformation* info) override;

  bool MergePieces;

private:
  vtkSMPContourGrid(const vtkSMPContourGrid&) = delete;
  void operator=(const vtkSMPContourGrid&) = delete;
};

#endif
