/*=========================================================================
  Program:   vv                     http://www.creatis.insa-lyon.fr/rio/vv

  Authors belong to: 
  - University of LYON              http://www.universite-lyon.fr/
  - Léon Bérard cancer center       http://www.centreleonberard.fr
  - CREATIS CNRS laboratory         http://www.creatis.insa-lyon.fr

  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the copyright notices for more information.

  It is distributed under dual licence

  - BSD        See included LICENSE.txt file
  - CeCILL-B   http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html
===========================================================================**/
#ifndef __itkImageToVTKImageFilter_h
#define __itkImageToVTKImageFilter_h
#include "itkVTKImageExport.h"
#include "vtkImageImport.h"
#include "vtkImageData.h"

namespace itk
{

/** \class ImageToVTKImageFilter
 * \brief Converts an ITK image into a VTK image and plugs a
 *  itk data pipeline to a VTK datapipeline.
 *
 *  This class puts together an itkVTKImageExporter and a vtkImageImporter.
 *  It takes care of the details related to the connection of ITK and VTK
 *  pipelines. The User will perceive this filter as an adaptor to which
 *  an itk::Image can be plugged as input and a vtkImage is produced as
 *  output.
 *
 * \ingroup   ImageFilters
 */
template <class TInputImage >
class ITK_EXPORT ImageToVTKImageFilter : public ProcessObject
{
public:
    /** Standard class typedefs. */
    typedef ImageToVTKImageFilter       Self;
    typedef ProcessObject             Superclass;
    typedef SmartPointer<Self>        Pointer;
    typedef SmartPointer<const Self>  ConstPointer;

    /** Method for creation through the object factory. */
    itkNewMacro(Self);

    /** Run-time type information (and related methods). */
    itkTypeMacro(ImageToVTKImageFilter, ProcessObject);

    /** Some typedefs. */
    typedef TInputImage InputImageType;
    typedef typename    InputImageType::ConstPointer    InputImagePointer;
    typedef VTKImageExport< InputImageType>            ExporterFilterType;
    typedef typename ExporterFilterType::Pointer        ExporterFilterPointer;

    /** Get the output in the form of a vtkImage.
        This call is delegated to the internal vtkImageImporter filter  */
    vtkImageData *  GetOutput() const;

    /** Set the input in the form of an itk::Image */
    void SetInput( const InputImageType * );

    /** Return the internal VTK image importer filter.
        This is intended to facilitate users the access
        to methods in the importer */
    vtkImageImport * GetImporter() const;

    /** Return the internal ITK image exporter filter.
        This is intended to facilitate users the access
        to methods in the exporter */
    ExporterFilterType * GetExporter() const;

    /** This call delegate the update to the importer */
    void Update();

protected:
    ImageToVTKImageFilter();
    virtual ~ImageToVTKImageFilter();

private:
    ImageToVTKImageFilter(const Self&); //purposely not implemented
    void operator=(const Self&); //purposely not implemented

    ExporterFilterPointer       m_Exporter;
    vtkImageImport            * m_Importer;

};

} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImageToVTKImageFilter.txx"
#endif

#endif