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ImageIO.h

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/*
 * @(#)vImageIO.h  1.0  2002-08-27 13:35
 *
 * Copyright (C)  2002  Daniel Léonard
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifndef _IMAGEIO_H_
#define _IMAGEIO_H_

#include <exception>
#include <string>
#include "Image.h"

class std::istream;
class std::ostream;

namespace halftoner
{

//---------------------------
// Class ImageFormatError
//---------------------------

   class ImageFormatError : public std::runtime_error
   {
      public:
         ImageFormatError(const std::string& message) : std::runtime_error(message) {}
   };


//---------------------------
// Class IOError
//---------------------------

   class IOError : public std::runtime_error
   {
      public:
         IOError(const std::string& message): runtime_error(message) {}
   };


//---------------------------
// Class ImageIO
//---------------------------

   class ImageIO
   {
      private:

         ImageIO() throw();

         ImageIO(const ImageIO&) throw();

         ImageIO operator=(const ImageIO&) throw();

      public:
         ~ImageIO() throw();


         static Image* loadPGM(std::istream& is) throw(ImageFormatError, IOError);

         static void savePBMraw(const Image& image, std::ostream& os) throw(IOError);

         static void savePBMascii(const Image& image, std::ostream& os) throw(IOError);
   };

}

#endif   /* ifndef _IMAGEIO_H_ */

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