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Image.h

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/*
 * @(#)include/Image.h  1.0  2002-08-27 13:49
 *
 * 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 _IMAGE_H_
#define _IMAGE_H_

#include <stdexcept>

namespace halftoner
{

   class Image
   {
      private:

         unsigned char* pixels;
         int width;
         int height;

      public:
         Image(int width, int height) throw(std::invalid_argument);

         ~Image() throw();


         int getWidth() const throw();

         int getHeight() const throw();

         int getColorAt(int x, int y) const throw (std::out_of_range);

         unsigned char* getCopy() const throw();


         void setColorAt(int x, int y, int color) throw (std::out_of_range);

         void setLine(int line, int* colors, int width) throw (std::out_of_range);

      private:

         unsigned char* getPixels() const throw();

         unsigned char* getPixel(int x, int y) const throw(std::out_of_range);

      public:

         static int calculateOffset(int x, int y, int width) throw();
   };

}

#endif   /* ifndef _IMAGE_H_ */

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