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 "vtkCommonExecutionModelModule.h" // For export macro
#include "vtkImageAlgorithm.h"
#include "vtkThreads.h" // for VTK_MAX_THREADS
 
class vtkImageData;
class vtkMultiThreader;
 
class VTKCOMMONEXECUTIONMODEL_EXPORT vtkThreadedImageAlgorithm : public vtkImageAlgorithm
{
public:
  vtkTypeMacro(vtkThreadedImageAlgorithm, vtkImageAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  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);
 
 
  vtkGetMacro(EnableSMP, bool);
  vtkSetMacro(EnableSMP, bool);
 
 
  static void SetGlobalDefaultEnableSMP(bool enable);
  static bool GetGlobalDefaultEnableSMP();
 
 
  vtkSetVector3Macro(MinimumPieceSize, int);
  vtkGetVector3Macro(MinimumPieceSize, int);
 
 
  vtkSetMacro(DesiredBytesPerPiece, vtkIdType);
  vtkGetMacro(DesiredBytesPerPiece, vtkIdType);
 
 
  vtkSetClampMacro(SplitMode, int, 0, 2);
  void SetSplitModeToSlab() { this->SetSplitMode(SLAB); }
  void SetSplitModeToBeam() { this->SetSplitMode(BEAM); }
  void SetSplitModeToBlock() { this->SetSplitMode(BLOCK); }
  vtkGetMacro(SplitMode, int);
 
 
  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() override;
 
  vtkMultiThreader* Threader;
  int NumberOfThreads;
 
  bool EnableSMP;
  static bool GlobalDefaultEnableSMP;
 
  enum SplitModeEnum
  {
    SLAB = 0,
    BEAM = 1,
    BLOCK = 2
  };
 
  int SplitMode;
  int SplitPath[3];
  int SplitPathLength;
  int MinimumPieceSize[3];
  vtkIdType DesiredBytesPerPiece;
 
  int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  virtual void SMPRequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector, vtkImageData*** inData, vtkImageData** outData,
    vtkIdType begin, vtkIdType end, vtkIdType pieces, int extent[6]);
 
  virtual void PrepareImageData(vtkInformationVector** inputVector,
    vtkInformationVector* outputVector, vtkImageData*** inDataObjects = nullptr,
    vtkImageData** outDataObjects = nullptr);
 
private:
  vtkThreadedImageAlgorithm(const vtkThreadedImageAlgorithm&) = delete;
  void operator=(const vtkThreadedImageAlgorithm&) = delete;
 
  friend class vtkThreadedImageAlgorithmFunctor;
};
 
#endif