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/******************************************************************************
 *       __    _    _   _       _       _   _____                             *
 *       | \  / |  | | | |     | |     | |  | ___|                            *
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 *       |_|  |_|  |_| |____|  |____|  |_|  |____|                            *
 * __________________________________________________________________________ *
 *                 Multifunctional Library For Image Processing               *
 *                                                                            *
 *                                                                            *
 *                                                                            *
 *      (c) Copyright 2007 by Humbert Florent                                 *
 *                                                                            *
 *      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; only version 2 of the License.          *
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 *      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.                          *
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 *      You should have received a copy of the GNU General Public License     *
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 *      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA             *
 *      02111-1307, USA.                                                      *
 ******************************************************************************/

#include "AreaOperator.hpp"

using namespace Millie;

AreaOperator::AreaOperator(const LocalAreaOperator & localOp)
{
  _localOp = 0;
  _localOp = localOp.clone();
}

AreaOperator::AreaOperator(LocalAreaOperator* areaOp)
{
  if(areaOp == 0)
    throw NullPointer("AAreaOperator");

  _localOp = areaOp;
}

AreaOperator::~AreaOperator()
{
  delete _localOp;
}

void AreaOperator::compute(Image & out, const Image& in)
{
  if(out.getNumComponents() != in.getNumComponents())
    throw IllegalArgument("AreaOperator::compute");

  LocalAreaOperator& localAreaOp = getLocalAreaOperator();

  int leftpadding = getLeftPadding();
  int rightpadding = getRightPadding();
  int toppadding = getTopPadding();
  int bottompadding = getBottomPadding();
  int hauteur = in.getHeight();
  int largeur = in.getWidth();

  out.resize(largeur - (rightpadding + leftpadding), hauteur - (toppadding+bottompadding));


  for(int canal=0; canal< in.getNumComponents(); canal++)
    for(int j = toppadding; j< hauteur - bottompadding; j++)
    {
      for(int i = leftpadding; i< largeur - rightpadding; i++)
      {
        out.setPixel(i - leftpadding, j - toppadding,
                     canal, localAreaOp.computeLocalArea(in, i,j, canal));

      }
    }
}

void AreaOperator::compute(Image& out, const Image& in, const BorderExtender& extender)
{
  Image tempo(in.getNumComponents());
  /*on étend le bord de l'image pour lui appliquer ensuite l'opération*/
  extender.extend(tempo, in, getTopPadding(),
                  getLeftPadding(),
                  getRightPadding(),
                  getBottomPadding());

  compute(out, tempo);
}


LocalAreaOperator& AreaOperator::getLocalAreaOperator()
{
  return *_localOp;
}

int AreaOperator::getTopPadding() const
{
  return _localOp->getTopPadding();
}

int AreaOperator::getBottomPadding() const
{
  return _localOp->getBottomPadding();
}

int AreaOperator::getLeftPadding() const
{
  return _localOp->getLeftPadding() ;
}


int AreaOperator::getRightPadding() const
{
  return _localOp->getRightPadding();
}


AreaOperator * AreaOperator::clone() const
{
  return new AreaOperator(*this);
}

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