/*=========================================================================                                                                               
  Program:   bbtk
  Module:    $RCSfile: bbvtkConcatImages.cxx,v $
  Language:  C++
  Date:      $Date: 2010/04/08 14:39:45 $
  Version:   $Revision: 1.1 $
=========================================================================*/

/* ---------------------------------------------------------------------

* Copyright (c) CREATIS-LRMN (Centre de Recherche en Imagerie Medicale)
* Authors : Eduardo Davila, Laurent Guigues, Jean-Pierre Roux
*
*  This software is governed by the CeCILL-B license under French law and 
*  abiding by the rules of distribution of free software. You can  use, 
*  modify and/ or redistribute the software under the terms of the CeCILL-B 
*  license as circulated by CEA, CNRS and INRIA at the following URL 
*  http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html 
*  or in the file LICENSE.txt.
*
*  As a counterpart to the access to the source code and  rights to copy,
*  modify and redistribute granted by the license, users are provided only
*  with a limited warranty  and the software's author,  the holder of the
*  economic rights,  and the successive licensors  have only  limited
*  liability. 
*
*  The fact that you are presently reading this means that you have had
*  knowledge of the CeCILL-B license and that you accept its terms.
* ------------------------------------------------------------------------ */                                                                         

/**
 *  \file 
 *  \brief 
 */

#ifdef _USE_VTK_
#include "bbvtkConcatImages.h"
#include "bbvtkPackage.h"

namespace bbvtk
{
   BBTK_ADD_BLACK_BOX_TO_PACKAGE(vtk,ConcatImages)
   BBTK_BLACK_BOX_IMPLEMENTATION(ConcatImages,bbtk::AtomicBlackBox);

//---------------------------------------------------------------------

   void ConcatImages::bbUserSetDefaultValues() 
   { 
      //std::cout << "-------- entree ds ConcatImages::bbUserSetDefaultValues()\n" << std::endl;
      
   // bbSetInputIn(NULL);  /// \TODO fix it! IN is a std::vector<vtkImageData> // JPR
      mConcat = NULL;
      bbSetOutputOut(NULL);
   }

//---------------------------------------------------------------------

   void ConcatImages::bbUserInitializeProcessing() 
   {
       //std::cout << "-------- entree ds ConcatImages::bbUserInitalizeProcessing()\n" << std::endl;
      //bbUserFinalizeProcessing();
      mConcat = vtkImageData::New();  // Alloc depends on  bbGetInputIn().size()  
   }
  
//---------------------------------------------------------------------

   void ConcatImages::bbUserFinalizeProcessing() 
   {
            //std::cout << "-------- entree ds ConcatImages::bbUserFinalizeProcessing()\n" << std::endl;
   // WTF? we never enter here // JPR  bbUserFinalizeProcessing()  JPR	
      if (mConcat!=NULL)
      {
        // mConcat->Delete();
        // mConcat=NULL;
      }
      bbSetOutputOut(mConcat);          
   }

//---------------------------------------------------------------------
 
 /// \TODO :clean this dirty stuff :
 ///  - receives a std::vector<vtkImageData*>
 ///  - exports a vtkImageData*
 ///  - supposes *all* the images are consistent (same type, same number of components, same pixel type)
 ///  - if images in the vector are already 3D, exports only the first one. ?!?  // JPR
 ///
   void ConcatImages::Process()
   {
        int dim[3];
	int nb = (unsigned int)bbGetInputIn().size();
        if (nb == 0) {} // ??? JPR
	
	bbGetInputIn()[0]->GetDimensions(dim);
	if (dim[2] > 1  || nb == 1) // dim[2] > 1 : Hopeless for vtk : the first file contains already a 3D object
				    // nb == 1 : only one image, nothing to do.
	{
	   mConcat->Delete();
	   mConcat = bbGetInputIn()[0];
	   //mConcat->PrintSelf(std::cout, vtkIndent(2));
	}
	else
	{
	   // We suppose *all* the images within the directory are consistent (same sizeS, same pixel Type?...)
	   vtkImageData * firstImage = bbGetInputIn()[0];
	   
		  //std::cout << "--------PrintSelf firstImage " << std::endl;
		  // firstImage->PrintSelf(std::cout, vtkIndent(2));	   
	   
           int nbComponents = firstImage->GetNumberOfScalarComponents();
           mConcat->SetNumberOfScalarComponents(nbComponents);
           mConcat->SetScalarType(firstImage->GetScalarType( ));	
	   firstImage->GetDimensions(dim);
	   dim[2]=nb;
	   mConcat->SetDimensions(dim);
	   mConcat->SetExtent(0, dim[0]-1, 0, dim[1]-1, 0, dim[2]-1);
	   mConcat->SetSpacing(firstImage->GetSpacing());
	   
	   mConcat->AllocateScalars();
	   mConcat->Update();	   
		     
	   int index_image, index_lignes, index_colonnes, index_components;
	   
	   for(index_image=0; index_image<nb; index_image++)
	   {
	      for(index_lignes=0; index_lignes<dim[0];index_lignes++)
	      {
	         for(index_colonnes=0; index_colonnes<dim[1];index_colonnes++)
	         {
	            for(index_components=0; index_components<nbComponents;index_components++)
		    { 
		      mConcat->SetScalarComponentFromDouble(index_lignes, index_colonnes, index_image, index_components,(bbGetInputIn()[index_image])->GetScalarComponentAsDouble(index_colonnes,index_lignes,0,index_components));
		    }
	         }
	      }
	   }
	}
   // Devrait etre dans bbUserFinalizeProcessing() ? On n'y entre jamais // JPR	
   bbSetOutputOut(mConcat);   	
   }		   

}//namespace bbtk

#endif // _USE_VTK_