vtkAlgorithm.h

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

  Program:   Visualization Toolkit
  Module:    vtkAlgorithm.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 vtkAlgorithm_h
#define vtkAlgorithm_h

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

class vtkAbstractArray;
class vtkAlgorithmInternals;
class vtkAlgorithmOutput;
class vtkCollection;
class vtkDataArray;
class vtkDataObject;
class vtkExecutive;
class vtkInformation;
class vtkInformationInformationVectorKey;
class vtkInformationIntegerKey;
class vtkInformationStringKey;
class vtkInformationStringVectorKey;
class vtkInformationVector;
class vtkProgressObserver;

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

  enum DesiredOutputPrecision
  {
    SINGLE_PRECISION,
    DOUBLE_PRECISION,
    DEFAULT_PRECISION
  };

  int HasExecutive();

  vtkExecutive* GetExecutive();

  virtual void SetExecutive(vtkExecutive* executive);

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

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

  virtual int
  ComputePipelineMTime(vtkInformation* request,
                       vtkInformationVector** inInfoVec,
                       vtkInformationVector* outInfoVec,
                       int requestFromOutputPort,
                       vtkMTimeType* mtime);

  virtual int ModifyRequest(vtkInformation* request, int when);

  vtkInformation* GetInputPortInformation(int port);

  vtkInformation* GetOutputPortInformation(int port);


  vtkGetObjectMacro(Information, vtkInformation);
  virtual void SetInformation(vtkInformation*);

  int GetNumberOfInputPorts();

  int GetNumberOfOutputPorts();


  void Register(vtkObjectBase* o) override;
  void UnRegister(vtkObjectBase* o) override;


  vtkSetMacro(AbortExecute,vtkTypeBool);
  vtkGetMacro(AbortExecute,vtkTypeBool);
  vtkBooleanMacro(AbortExecute,vtkTypeBool);


  vtkGetMacro(Progress,double);

  VTK_LEGACY(void SetProgress(double));

  void UpdateProgress(double amount);


  void SetProgressShiftScale(double shift, double scale);
  vtkGetMacro(ProgressShift, double);
  vtkGetMacro(ProgressScale, double);


  void SetProgressText(const char* ptext);
  vtkGetStringMacro(ProgressText);


  vtkGetMacro( ErrorCode, unsigned long );

  // left public for performance since it is used in inner loops
  vtkTypeBool AbortExecute;

  static vtkInformationIntegerKey* INPUT_IS_OPTIONAL();
  static vtkInformationIntegerKey* INPUT_IS_REPEATABLE();
  static vtkInformationInformationVectorKey* INPUT_REQUIRED_FIELDS();
  static vtkInformationStringVectorKey* INPUT_REQUIRED_DATA_TYPE();
  static vtkInformationInformationVectorKey* INPUT_ARRAYS_TO_PROCESS();
  static vtkInformationIntegerKey* INPUT_PORT();
  static vtkInformationIntegerKey* INPUT_CONNECTION();

  static vtkInformationIntegerKey* CAN_PRODUCE_SUB_EXTENT();

  static vtkInformationIntegerKey* CAN_HANDLE_PIECE_REQUEST();



  virtual void SetInputArrayToProcess(int idx, int port, int connection,
                              int fieldAssociation,
                              const char *name);
  virtual void SetInputArrayToProcess(int idx, int port, int connection,
                              int fieldAssociation,
                              int fieldAttributeType);
  virtual void SetInputArrayToProcess(int idx, vtkInformation *info);

  virtual void SetInputArrayToProcess(int idx, int port, int connection,
                              const char* fieldAssociation,
                              const char* attributeTypeorName);

  vtkInformation *GetInputArrayInformation(int idx);

  // from here down are convenience methods that really are executive methods



  void RemoveAllInputs();

  vtkDataObject* GetOutputDataObject(int port);

  vtkDataObject *GetInputDataObject(int port,
                                    int connection);


  virtual void SetInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void SetInputConnection(vtkAlgorithmOutput* input);


  virtual void AddInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void AddInputConnection(vtkAlgorithmOutput* input);

  virtual void RemoveInputConnection(int port, vtkAlgorithmOutput* input);

  virtual void RemoveInputConnection(int port, int idx);

  virtual void RemoveAllInputConnections(int port);

  virtual void SetInputDataObject(int port, vtkDataObject* data);
  virtual void SetInputDataObject(vtkDataObject* data)
    { this->SetInputDataObject(0, data); }

  virtual void AddInputDataObject(int port, vtkDataObject* data);
  virtual void AddInputDataObject(vtkDataObject* data)
    { this->AddInputDataObject(0, data); }

  vtkAlgorithmOutput* GetOutputPort(int index);
  vtkAlgorithmOutput* GetOutputPort() {
    return this->GetOutputPort(0); }

  int GetNumberOfInputConnections(int port);

  int GetTotalNumberOfInputConnections();

  vtkAlgorithmOutput* GetInputConnection(int port, int index);

  vtkAlgorithm* GetInputAlgorithm(int port, int index, int& algPort);

  vtkAlgorithm* GetInputAlgorithm(int port, int index);

  vtkAlgorithm* GetInputAlgorithm()
  {
    return this->GetInputAlgorithm(0, 0);
  }

  vtkExecutive* GetInputExecutive(int port, int index);

  vtkExecutive* GetInputExecutive()
  {
    return this->GetInputExecutive(0, 0);
  }

  vtkInformation* GetInputInformation(int port, int index);

  vtkInformation* GetInputInformation()
  {
    return this->GetInputInformation(0, 0);
  }

  vtkInformation* GetOutputInformation(int port);


  virtual void Update(int port);
  virtual void Update();

  virtual int Update(int port, vtkInformationVector* requests);

  virtual int Update(vtkInformation* requests);

  virtual int UpdatePiece(
    int piece, int numPieces, int ghostLevels, const int extents[6]=nullptr);

  virtual int UpdateExtent(const int extents[6]);

  virtual int UpdateTimeStep(double time,
    int piece=-1, int numPieces=1, int ghostLevels=0, const int extents[6]=nullptr);

  virtual void UpdateInformation();

  virtual void UpdateDataObject();

  virtual void PropagateUpdateExtent();

  virtual void UpdateWholeExtent();

  void ConvertTotalInputToPortConnection(int ind, int& port, int& conn);

  //======================================================================
  //The following block of code is to support old style VTK applications. If
  //you are using these calls there are better ways to do it in the new
  //pipeline
  //======================================================================


  virtual void SetReleaseDataFlag(int);
  virtual int GetReleaseDataFlag();
  void ReleaseDataFlagOn();
  void ReleaseDataFlagOff();

  //========================================================================


  int UpdateExtentIsEmpty(vtkInformation *pinfo, vtkDataObject *output);
  int UpdateExtentIsEmpty(vtkInformation *pinfo, int extentType);

  static void SetDefaultExecutivePrototype(vtkExecutive* proto);


  int* GetUpdateExtent() VTK_SIZEHINT(6)
  {
    return this->GetUpdateExtent(0);
  }
  int* GetUpdateExtent(int port) VTK_SIZEHINT(6);
  void GetUpdateExtent(int& x0, int& x1, int& y0, int& y1,
                       int& z0, int& z1)
  {
    this->GetUpdateExtent(0, x0, x1, y0, y1, z0, z1);
  }
  void GetUpdateExtent(int port,
                       int& x0, int& x1, int& y0, int& y1,
                       int& z0, int& z1);
  void GetUpdateExtent(int extent[6])
  {
    this->GetUpdateExtent(0, extent);
  }
  void GetUpdateExtent(int port, int extent[6]);


  int GetUpdatePiece()
  {
    return this->GetUpdatePiece(0);
  }
  int GetUpdatePiece(int port);
  int GetUpdateNumberOfPieces()
  {
    return this->GetUpdateNumberOfPieces(0);
  }
  int GetUpdateNumberOfPieces(int port);
  int GetUpdateGhostLevel()
  {
    return this->GetUpdateGhostLevel(0);
  }
  int GetUpdateGhostLevel(int port);


  void SetProgressObserver(vtkProgressObserver*);
  vtkGetObjectMacro(ProgressObserver, vtkProgressObserver);

protected:
  vtkAlgorithm();
  ~vtkAlgorithm() override;

  // Keys used to indicate that input/output port information has been
  // filled.
  static vtkInformationIntegerKey* PORT_REQUIREMENTS_FILLED();

  // Arbitrary extra information associated with this algorithm
  vtkInformation* Information;

  virtual int FillInputPortInformation(int port, vtkInformation* info);

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

  virtual void SetNumberOfInputPorts(int n);

  virtual void SetNumberOfOutputPorts(int n);

  // Helper methods to check input/output port index ranges.
  int InputPortIndexInRange(int index, const char* action);
  int OutputPortIndexInRange(int index, const char* action);

  int GetInputArrayAssociation(int idx, vtkInformationVector **inputVector);


  int GetInputArrayAssociation(int idx, int connection,
                               vtkInformationVector **inputVector);
  int GetInputArrayAssociation(int idx, vtkDataObject* input);



  vtkDataArray *GetInputArrayToProcess(int idx,vtkInformationVector **inputVector);
  vtkDataArray *GetInputArrayToProcess(int idx,
                                       vtkInformationVector **inputVector,
                                       int& association);


  vtkDataArray *GetInputArrayToProcess(int idx,
                                       int connection,
                                       vtkInformationVector **inputVector);
  vtkDataArray *GetInputArrayToProcess(int idx,
                                       int connection,
                                       vtkInformationVector **inputVector,
                                       int& association);
  vtkDataArray *GetInputArrayToProcess(int idx,
                                       vtkDataObject* input);
  vtkDataArray *GetInputArrayToProcess(int idx,
                                       vtkDataObject* input,
                                       int& association);



  vtkAbstractArray *GetInputAbstractArrayToProcess(int idx,vtkInformationVector **inputVector);
  vtkAbstractArray *GetInputAbstractArrayToProcess
    (int idx, vtkInformationVector **inputVector, int& association);


  vtkAbstractArray *GetInputAbstractArrayToProcess(int idx,
                                       int connection,
                                       vtkInformationVector **inputVector);
  vtkAbstractArray *GetInputAbstractArrayToProcess(int idx,
                                       int connection,
                                       vtkInformationVector **inputVector,
                                       int& association);
  vtkAbstractArray *GetInputAbstractArrayToProcess(int idx,
                                       vtkDataObject* input);
  vtkAbstractArray *GetInputAbstractArrayToProcess(int idx,
                                       vtkDataObject* input,
                                       int& association);



  vtkInformation *GetInputArrayFieldInformation(int idx,
                                                vtkInformationVector **inputVector);


  virtual vtkExecutive* CreateDefaultExecutive();


  vtkSetMacro( ErrorCode, unsigned long );
  unsigned long ErrorCode;

  // Progress/Update handling
  double Progress;
  char  *ProgressText;

  // Garbage collection support.
  void ReportReferences(vtkGarbageCollector*) override;

  // executive methods below

  virtual void SetNthInputConnection(int port, int index,
                                     vtkAlgorithmOutput* input);

  virtual void SetNumberOfInputConnections(int port, int n);

  static vtkExecutive* DefaultExecutivePrototype;

  void SetInputDataInternal(int port, vtkDataObject *input)
    { this->SetInputDataObject(port, input); }
  void AddInputDataInternal(int port, vtkDataObject *input)
    { this->AddInputDataObject(port, input); }

  vtkProgressObserver* ProgressObserver;

private:
  vtkExecutive* Executive;
  vtkInformationVector* InputPortInformation;
  vtkInformationVector* OutputPortInformation;
  vtkAlgorithmInternals* AlgorithmInternal;
  static void ConnectionAdd(vtkAlgorithm* producer, int producerPort,
                            vtkAlgorithm* consumer, int consumerPort);
  static void ConnectionRemove(vtkAlgorithm* producer, int producerPort,
                               vtkAlgorithm* consumer, int consumerPort);
  static void ConnectionRemoveAllInput(vtkAlgorithm* consumer, int port);
  static void ConnectionRemoveAllOutput(vtkAlgorithm* producer, int port);

private:
  vtkAlgorithm(const vtkAlgorithm&) = delete;
  void operator=(const vtkAlgorithm&) = delete;

  double ProgressShift;
  double ProgressScale;
};

#endif