vtkStreamingDemandDrivenPipeline.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkStreamingDemandDrivenPipeline.h,v $

  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 __vtkStreamingDemandDrivenPipeline_h
#define __vtkStreamingDemandDrivenPipeline_h

#include "vtkDemandDrivenPipeline.h"

class vtkExtentTranslator;
class vtkInformationDoubleVectorKey;
class vtkInformationIntegerKey;
class vtkInformationIntegerVectorKey;
class vtkInformationObjectBaseKey;

class VTK_FILTERING_EXPORT vtkStreamingDemandDrivenPipeline : public vtkDemandDrivenPipeline
{
public:
  static vtkStreamingDemandDrivenPipeline* New();
  vtkTypeRevisionMacro(vtkStreamingDemandDrivenPipeline,vtkDemandDrivenPipeline);
  void PrintSelf(ostream& os, vtkIndent indent);


  virtual int ProcessRequest(vtkInformation* request,
                             vtkInformationVector** inInfo,
                             vtkInformationVector* outInfo);


  virtual int Update();
  virtual int Update(int port);
  virtual int UpdateWholeExtent();

  int PropagateUpdateExtent(int outputPort);


  int SetMaximumNumberOfPieces(vtkInformation *, int n);
  int GetMaximumNumberOfPieces(vtkInformation *);


  int SetWholeExtent(vtkInformation *, int extent[6]);
  void GetWholeExtent(vtkInformation *, int extent[6]);
  int* GetWholeExtent(vtkInformation *);

  int SetUpdateExtentToWholeExtent(vtkInformation *);
  

  int SetUpdateExtent(vtkInformation *, int extent[6]);
  void GetUpdateExtent(vtkInformation *, int extent[6]);
  int* GetUpdateExtent(vtkInformation *);


  int SetUpdateExtent(vtkInformation *, 
                      int piece, int numPieces, int ghostLevel);
  int SetUpdatePiece(vtkInformation *, int piece);
  int GetUpdatePiece(vtkInformation *);
  int SetUpdateNumberOfPieces(vtkInformation *, int n);
  int GetUpdateNumberOfPieces(vtkInformation *);
  int SetUpdateGhostLevel(vtkInformation *, int n);
  int GetUpdateGhostLevel(vtkInformation *);


  int SetRequestExactExtent(int port, int flag);
  int GetRequestExactExtent(int port);


  int SetExtentTranslator(vtkInformation *, vtkExtentTranslator* translator);
  vtkExtentTranslator* GetExtentTranslator(vtkInformation *info);


  int SetWholeBoundingBox(int port, double bb[6]);
  void GetWholeBoundingBox(int port, double bb[6]);
  double* GetWholeBoundingBox(int port);

  static vtkInformationRequestKey* REQUEST_UPDATE_EXTENT();

  static vtkInformationIntegerKey* CONTINUE_EXECUTING();

  static vtkInformationObjectBaseKey* EXTENT_TRANSLATOR();


  static vtkInformationIntegerKey* UPDATE_EXTENT_INITIALIZED();
  static vtkInformationIntegerVectorKey* UPDATE_EXTENT();
  static vtkInformationIntegerKey* UPDATE_PIECE_NUMBER();
  static vtkInformationIntegerKey* UPDATE_NUMBER_OF_PIECES();
  static vtkInformationIntegerKey* UPDATE_NUMBER_OF_GHOST_LEVELS();

  static vtkInformationIntegerVectorKey* WHOLE_EXTENT();

  static vtkInformationIntegerKey* MAXIMUM_NUMBER_OF_PIECES();

  static vtkInformationDoubleVectorKey* WHOLE_BOUNDING_BOX();

  static vtkInformationIntegerKey* EXACT_EXTENT();

  static vtkInformationDoubleVectorKey* TIME_STEPS();

  static vtkInformationIntegerKey* UPDATE_TIME_INDEX();

protected:
  vtkStreamingDemandDrivenPipeline();
  ~vtkStreamingDemandDrivenPipeline();

  // Setup default information on the output after the algorithm
  // executes information.
  virtual int ExecuteInformation(vtkInformation* request,
                                 vtkInformationVector** inInfoVec,
                                 vtkInformationVector* outInfoVec);

  // Copy information for the given request.
  virtual void CopyDefaultInformation(vtkInformation* request, int direction,
                                      vtkInformationVector** inInfoVec,
                                      vtkInformationVector* outInfoVec);

  // Helper to check output information before propagating it to inputs.
  virtual int VerifyOutputInformation(int outputPort,
                                      vtkInformationVector** inInfoVec,
                                      vtkInformationVector* outInfoVec);


  // Override this check to account for update extent.
  virtual int NeedToExecuteData(int outputPort,
                                vtkInformationVector** inInfoVec,
                                vtkInformationVector* outInfoVec);

  // Override these to handle the continue-executing option.
  virtual void ExecuteDataStart(vtkInformation* request,
                                vtkInformationVector** inInfoVec,
                                vtkInformationVector* outInfoVec);
  virtual void ExecuteDataEnd(vtkInformation* request,
                              vtkInformationVector** inInfoVec,
                              vtkInformationVector* outInfoVec);

  // Override this to handle cropping and ghost levels.
  virtual void MarkOutputsGenerated(vtkInformation* request,
                                    vtkInformationVector** inInfoVec,
                                    vtkInformationVector* outInfoVec);


  // Remove update/whole extent when resetting pipeline information.
  virtual void ResetPipelineInformation(int port, vtkInformation*);

  // Flag for when an algorithm returns with CONTINUE_EXECUTING in the
  // request.
  int ContinueExecuting;

  vtkInformation *UpdateExtentRequest;

  // did the most recent PUE do anything ?
  int LastPropogateUpdateExtentShortCircuited;
  
private:
  vtkStreamingDemandDrivenPipeline(const vtkStreamingDemandDrivenPipeline&);  // Not implemented.
  void operator=(const vtkStreamingDemandDrivenPipeline&);  // Not implemented.
};

#endif

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