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

  Program: DICOM for VTK

  Copyright (c) 2012-2015 David Gobbi
  All rights reserved.
  See Copyright.txt or http://dgobbi.github.io/bsd3.txt 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.

=========================================================================*/
// .NAME vtkDICOMAlgorithm - Base class for DICOM image filters
// .SECTION Description
// This class allows the DICOM meta data to be carried by the VTK pipeline.
// Subclasses should always call Superclass::RequestInformation() and
// Superclass::RequestData within their own RequestInformation and
// RequestData methods.

#ifndef vtkDICOMAlgorithm_h
#define vtkDICOMAlgorithm_h

#include <vtkThreadedImageAlgorithm.h>
#include "vtkDICOMModule.h" // For export macro

class vtkLookupTable;
class vtkInformationDataObjectKey;
class vtkInformationDoubleVectorKey;
class vtkDICOMMetaData;
class vtkDICOMPerFilePalette;

//----------------------------------------------------------------------------
class VTKDICOM_EXPORT vtkDICOMAlgorithm : public vtkThreadedImageAlgorithm
{
public:
  vtkTypeMacro(vtkDICOMAlgorithm, vtkThreadedImageAlgorithm);

  // Description:
  // Static method for construction.
  static vtkDICOMAlgorithm *New();

  // Description:
  // Print information about this object.
  virtual void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // The information key for the meta data.
  static vtkInformationDataObjectKey *META_DATA();

  // Description:
  // A key to get the patient matrix from the VTK pipeline.
  static vtkInformationDoubleVectorKey *PATIENT_MATRIX();

protected:
  vtkDICOMAlgorithm();
  ~vtkDICOMAlgorithm();

  // Description:
  // Get the information object that holds the meta data for the given input.
  vtkInformation *GetMetaDataInformation(
    vtkInformationVector** inputVector, int inputPort, int inputConnection);

  // Description:
  // Copy the meta data from an input connection to an output port.
  // This is called by RequestInformation. To copy the meta data to
  // all output ports, use "-1" as the output port.
  virtual void CopyMetaDataToOutputInformation(
    vtkInformationVector** inputVector, int inputPort, int inputConnection,
    vtkInformationVector* outputVector, int outputPort);

  // Description:
  // Copy the meta data from the output information to the output data.
  // This is called by RequestData.
  virtual void CopyMetaDataToOutputData(
    vtkInformation *outInfo, vtkDataObject *outData);

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

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

  virtual void ThreadedRequestData(
    vtkInformation *request, vtkInformationVector **inputVector,
    vtkInformationVector *outputVector, vtkImageData ***inData,
    vtkImageData **outData, int ext[6], int id);

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

#endif // vtkDICOMAlgorithm_h