MagickReader.ih

/**
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 **/
 
/**
 * @file MagickReader.ih
 * @author David Coeurjolly (\c david.coeurjolly@liris.cnrs.fr )
 * Laboratoire d'InfoRmatique en Image et Systèmes d'information - LIRIS (CNRS, UMR 5205), CNRS, France
 *
 * @date 2010/07/25
 *
 * Implementation of inline methods defined in MagickReader.h
 *
 * This file is part of the DGtal library.
 */
 
 
//////////////////////////////////////////////////////////////////////////////
#include <cstdlib>
//////////////////////////////////////////////////////////////////////////////
 
///////////////////////////////////////////////////////////////////////////////
// Interface - public :
 
template <typename TImageContainer, typename TFunctor>
inline
TImageContainer
DGtal::MagickReader<TImageContainer, TFunctor>::importImage(const std::string & filename,
                                                  const Functor & aFunctor, bool topbotomOrder )
{
  int w,h;
  const Magick::PixelPacket *cacheRead;
  DGtal::IOException dgtalio;
 
  Magick::InitializeMagick(NULL);
 
  Magick::Image img;
 
  try
    {
      img.read ( filename );
    }
  catch( ... )
    {
      std::cout << "MagickReader : can't open " << filename << std::endl;
      throw dgtalio;
    }
 
  w = img.size().width();
  h = img.size().height();
 
  //@todo Check Magick::Types according to ValueType
  img.type ( Magick::TrueColorType );
  img.modifyImage();
  cacheRead = img.getConstPixels ( 0, 0, w, h );
 
  //@todo check ImageMagick errors.
  //trace.error() << "MagickReader : can't open "<< filename<<endl;
 
  typename TImageContainer::Point firstPoint;
  typename TImageContainer::Point lastPoint;
 
  firstPoint = TImageContainer::Point::zero;
  lastPoint[0] = w-1;
  lastPoint[1] = h-1;
 
  typename TImageContainer::Domain domain(firstPoint,lastPoint);
  TImageContainer image(domain);
 
  //We scan the file
  typename TImageContainer::Domain::ConstIterator it = domain.begin(),
    itend=domain.end();
 
  for(; it != itend; ++it)
    {
      const Magick::PixelPacket *pixel = cacheRead + w * ((topbotomOrder)? ( h - 1 - (*it)[1] ): (*it)[1] ) + (*it)[0];
      Color col(pixel->red,pixel->green,pixel->blue);
      image.setValue( (*it),  aFunctor(col)  );
    }
 
  return image;
}