dox/Filtering/vtkThreadedImageAlgorithm.h

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

  Program:   Visualization Toolkit
  Module:    vtkThreadedImageAlgorithm.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 __vtkThreadedImageAlgorithm_h
#define __vtkThreadedImageAlgorithm_h

#include "vtkImageAlgorithm.h"

class vtkImageData;
class vtkMultiThreader;

class VTK_FILTERING_EXPORT vtkThreadedImageAlgorithm : public vtkImageAlgorithm
{
public:
  vtkTypeMacro(vtkThreadedImageAlgorithm,vtkImageAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);


  virtual void ThreadedRequestData(vtkInformation *request, 
                                   vtkInformationVector **inputVector, 
                                   vtkInformationVector *outputVector,
                                   vtkImageData ***inData, 
                                   vtkImageData **outData,
                                   int extent[6], int threadId);
  
  // also support the old signature
  virtual void ThreadedExecute(vtkImageData *inData, 
                               vtkImageData *outData,
                               int extent[6], int threadId);
  

  vtkSetClampMacro( NumberOfThreads, int, 1, VTK_MAX_THREADS );
  vtkGetMacro( NumberOfThreads, int );


  virtual int SplitExtent(int splitExt[6], int startExt[6], 
                          int num, int total); 

protected:
  vtkThreadedImageAlgorithm();
  ~vtkThreadedImageAlgorithm();

  vtkMultiThreader *Threader;
  int NumberOfThreads;
  

  virtual int RequestData(vtkInformation* request,
                          vtkInformationVector** inputVector,
                          vtkInformationVector* outputVector);

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

#endif

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