/*=========================================================================                                                                               
  Program:   bbtk
  Module:    $RCSfile: bbvtkFlip.cxx,v $
  Language:  C++
  Date:      $Date: 2012/07/09 13:03:17 $
  Version:   $Revision: 1.3 $
=========================================================================*/

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

* 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 "bbvtkFlip.h"
#include "bbvtkPackage.h"

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

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

   void Flip::bbUserSetDefaultValues() 
   { 
      //std::cout << "-------- entree ds Flip::bbUserSetDefaultValues()\n" << std::endl;
      
      bbSetInputIn(NULL); 
      mImageOut = NULL;
      bbSetOutputOut(NULL);
   }

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

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

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

//---------------------------------------------------------------------
 
 ///  :
 ///  - receives a vtkImageData*imageIn, flips it
 ///  - exports a vtkImageData*  
 ///  
 ///
void Flip::Process()
{
	vtkImageData* imageIn = bbGetInputIn();
	vtkImageData * mImageOut = flip(imageIn);
      
   // Devrait etre dans bbUserFinalizeProcessing() ? // JPR	
        bbSetOutputOut(mImageOut);   	
}


vtkImageData * Flip::flip(vtkImageData *imageIn)
{   
   int inputdims[3];
//   int outputdims[3];
   imageIn->GetDimensions (inputdims);
   imageIn->Update();
   int nbScalComp = imageIn->GetNumberOfScalarComponents();
   int scalarSize = imageIn->GetScalarSize();
   int lineSize  = inputdims[0]*scalarSize*nbScalComp;	   
   int planeSize = inputdims[1]*lineSize;
   char *pixelsIn = (char *)imageIn->GetScalarPointer();
      
   char *temp = (char *)malloc(lineSize);
   char *line1;
   char *line2;
   char *debPlan;     
   for(int k=0; k<inputdims[2]; k++) {  // iterate on planes
        debPlan = pixelsIn+k*planeSize;
		for(int j=0; j<inputdims[1]/2; j++) { // iterates on rows
			line1 = debPlan+j*lineSize;
			line2 = debPlan+(inputdims[1]-1-j)*lineSize;
			memcpy(temp,  line2, lineSize);
			memcpy(line2, line1, lineSize);
			memcpy(line1, temp,  lineSize);	       
       }
   }
   
   free (temp);
   return imageIn;        
}

}//namespace bbtk

#endif // _USE_VTK_