DitheringOp.h

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/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2013 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLFilter/src/ICLFilter/DitheringOp.h                  **
** Module : ICLFilter                                              **
** Authors: Christof Elbrechter                                    **
**                                                                 **
**                                                                 **
** GNU LESSER GENERAL PUBLIC LICENSE                               **
** This file may be used under the terms of the GNU Lesser General **
** Public License version 3.0 as published by the                  **
**                                                                 **
** Free Software Foundation and appearing in the file LICENSE.LGPL **
** included in the packaging of this file.  Please review the      **
** following information to ensure the license requirements will   **
** be met: http://www.gnu.org/licenses/lgpl-3.0.txt                **
**                                                                 **
** The development of this software was supported by the           **
** Excellence Cluster EXC 277 Cognitive Interaction Technology.    **
** The Excellence Cluster EXC 277 is a grant of the Deutsche       **
** Forschungsgemeinschaft (DFG) in the context of the German       **
** Excellence Initiative.                                          **
**                                                                 **
********************************************************************/

#pragma once

#include <ICLUtils/CompatMacros.h>
#include <ICLUtils/Uncopyable.h>
#include <ICLFilter/UnaryOp.h>

namespace icl{
  namespace filter{


    class ICLFilter_API DitheringOp : public UnaryOp, public utils::Uncopyable {
      public:

      enum Algorithm{
        FloydSteinberg 
      };
      DitheringOp (Algorithm a=FloydSteinberg, int levels=2);

      virtual ~DitheringOp(){}

      void apply (const core::ImgBase *poSrc, core::ImgBase **ppoDst);

      Algorithm getAlgorithm() const { return m_algorithm; }

      void setAlgorithm(Algorithm a) { m_algorithm = a; }

      int getLevels() const { return m_levels; }

      void setLevels(int l) {
        if(l<2) l=2;
        if(l>128) l=128;
        m_levels = l;
      }

      using UnaryOp::apply;

      private:
      Algorithm m_algorithm;
      int m_levels;
    };
  } // namespace filter
}