/*=========================================================================
                                                                                
  Program:   bbtk
  Module:    $RCSfile: bbitkImageReader.cxx,v $
  Language:  C++
  Date:      $Date: 2008/04/18 12:59:50 $
  Version:   $Revision: 1.3 $
                                                                                
  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_

#include "bbitkImageReader.h"
#include "bbitkPackage.h"
#include "itkImageFileReader.h"

namespace bbitk 
{
  BBTK_BLACK_BOX_IMPLEMENTATION(ImageReader,bbtk::AtomicBlackBox);
  
  BBTK_ADD_BLACK_BOX_TO_PACKAGE(itk,ImageReader);




  void ImageReader::Read()
  {
    std::string filename = bbGetInputFilename();

    itk::ImageIOBase::Pointer genericReader = 
      itk::ImageIOFactory::CreateImageIO(filename.c_str(), 
					 itk::ImageIOFactory::ReadMode);
    if (!genericReader)
      {
	bbtkError("File format unknown (while reading \"" << filename << "\")");
      }
    genericReader->SetFileName(filename.c_str());
    genericReader->ReadImageInformation();  
    
    bbtk::TypeInfo typ = GetITKImagePtrTypeInfoFromPixelTypeInfoAndDimension(genericReader->GetComponentTypeInfo(), genericReader->GetNumberOfDimensions());

    BBTK_TEMPLATE_ITK_IMAGE_SWITCH( typ, Read);
  }



  /** 
      Template Processing 
  */
  template<class itkImageType>
  void ImageReader::Read()
  {
    bbtkDebugMessageInc("Core",9,"itkImageReader<"<<
			bbtk::TypeName<itkImageType>()
			<<">::Read()"<<std::endl);

    typedef itk::ImageFileReader< itkImageType > itkReaderType;

    typename itkReaderType::Pointer reader = itkReaderType::New();
    std::string filename = bbGetInputFilename();
    reader->SetFileName(filename.c_str());
    try { reader->Update(); }
    catch( std::exception& e ) 
      {
	bbtkError("could not read image \""<< filename << "\" : "<<e.what());
      }

    reader->GetOutput()->Register();
    bbSetOutputOut( reader->GetOutput() );

    bbtkDebugDecTab("Core",9);
  }






}
// eo namespace bbtk

#endif