/*=========================================================================
                                                                                
  Program:   bbtk
  Module:    $RCSfile: bbitkvtkitkImage2vtkImageData.cxx,v $
  Language:  C++
  Date:      $Date: 2008/05/14 07:01:00 $
  Version:   $Revision: 1.4 $
                                                                                
  Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
  l'Image). All rights reserved. See Doc/License.txt or
  http://www.creatis.insa-lyon.fr/Public/bbtk/License.html 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 notices for more information.
                                                                                
=========================================================================*/
/**
 *  \file 
 *  \brief 
 */
#ifdef _USE_ITK_
#ifdef _USE_VTK_

#include "bbitkvtkitkImage2vtkImageData.h"
#include "bbitkvtkPackage.h"
// VtkToItkConnection 
//#include "itkVTKImageToImageFilter.h"
// ItkToVtkConnection
#include "itkImageToVTKImageFilter.h"


namespace bbitkvtk 
{
  BBTK_BLACK_BOX_IMPLEMENTATION(itkImage2vtkImageData,bbtk::AtomicBlackBox);

  BBTK_ADD_BLACK_BOX_TO_PACKAGE(itkvtk,itkImage2vtkImageData);




  void itkImage2vtkImageData::Convert()
  {
    bbtk::TypeInfo t = bbGetInputIn().type();
    BBTK_TEMPLATE_ITK_IMAGE_SWITCH(t,Convert);
  }
  


   template<class T>
   void itkImage2vtkImageData::Convert()
  {
    bbtkDebugMessage("process",5,"==> ["<<bbGetFullName()<<"] : Convert<"
		     <<bbtk::TypeName<T>()
		     <<">()"<<std::endl);

    typedef T itkImageType;
    typedef itk::ImageToVTKImageFilter< itkImageType > ItkToVtkConnection;
    typename ItkToVtkConnection::Pointer conv;

    // No converter yet : create it and set its input
    if (!mConverter) 
      {
	bbtkDebugMessage("process",5,"    ["<<bbGetFullName()<<"] : No converter yet : creating it"<<std::endl);
	conv = ItkToVtkConnection::New();
	mConverter = conv;
	conv->SetInput( this->bbGetInputIn().get<itkImageType*>() );
      }
    else 
      {
	bbtkDebugMessage("process",5,"    ["<<bbGetFullName()<<"] : Converter ok "<<std::endl);
	
	// Input itkImageType type changed ? 
	// Have to change the converter and set its input
	conv = dynamic_cast<ItkToVtkConnection*>
	  ((itk::ProcessObject*)mConverter);
	if (!conv) 
	  {
	    bbtkDebugMessage("process",5,"    ["<<bbGetFullName()<<"] : Converter of wrong input type : reacreating it "<<std::endl);

	    mConverter->UnRegister();
	    conv = ItkToVtkConnection::New();
	    mConverter = conv;
	    conv->SetInput( this->bbGetInputIn().get<itkImageType*>() );
	  }
	// Input image type did not change but input image pointer did:
	// set new input
	else if ( this->bbGetInputIn().get<itkImageType*>() 
		  != (itkImageType*)(conv->GetExporter()->GetInputs()[0].GetPointer()))
	  {
	    bbtkDebugMessage("process",5,"    ["<<bbGetFullName()<<"] : Converter input changed : resetting it"<<std::endl);

	    conv->SetInput( this->bbGetInputIn().get<itkImageType*>() );
	  }
	else 
	  {
	    bbtkDebugMessage("process",5,"    ["<<bbGetFullName()<<"] : Nothing changed"<<std::endl);	  

	  }
      }
    try
      {
	
	bbtkDebugMessage("process",5,"    ["<<bbGetFullName()<<"] : Trying update"<<std::endl);	 

	conv->Update();
	bbSetOutputOut(conv->GetOutput());
      }
    catch( itk::ExceptionObject & e) 
      {
	bbtkError("itkImage2vtkImageData<"
		  <<bbtk::TypeName<T>()
		  <<">::Convert() : "<<e);
      } 
    bbtkDebugMessage("process",5,"<== ["<<bbGetFullName()<<"] : Convert<"
		     <<bbtk::TypeName<T>()
		     <<">() *DONE*"<<std::endl);


 }

  void itkImage2vtkImageData::bbUserConstructor()
  {
    bbSetOutputOut(NULL);
    mConverter = 0;
  }
  void itkImage2vtkImageData::bbUserCopyConstructor()
  {
    bbSetOutputOut(NULL);
    mConverter = 0;
  }
  void itkImage2vtkImageData::bbUserDestructor()
  {
  }
  

}
// eo namespace bbitkvtk

#endif
// _USE_VTK_
#endif
// _USE_ITK_