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ErrorDiffusionSpec.cxx

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/*
 * @(#)src/ErrorDiffusionSpec.cxx  1.0  2002-08-27 12:27
 *
 * 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.
 */

#include <string>
#include "ErrorDiffusionSpec.h"

namespace halftoner
{

//---------------------------
// Constructor
//---------------------------

   ErrorDiffusionSpec::ErrorDiffusionSpec(int threshold, ErrorDiffusionHalftoner::PathStrategy& strategy) throw(std::domain_error) :
      threshold(threshold),
      strategy(strategy)
   {
   // check parameters
      if ((0 > threshold) || (threshold > 255))
      {
         std::string message("threshold is not within limits");
         throw std::domain_error(message);
      }
   }


//---------------------------
// Destructor
//---------------------------

   ErrorDiffusionSpec::~ErrorDiffusionSpec() throw()
   {
   // nothing
   }


//---------------------------
// Instance methods
//---------------------------

   int ErrorDiffusionSpec::getThreshold() const throw()
   {
      return this->threshold;
   }

   ErrorDiffusionHalftoner::PathStrategy& ErrorDiffusionSpec::getStrategy() const throw()
   {
      return this->strategy;
   }

}

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