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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  *
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 ******************************************************************************/

#include <iostream>

#include "Kernel.hpp"


using namespace Millie;

Kernel::Kernel(int taillex, int tailley, int originex, int originey)
{

  if(taillex<=0 | tailley<=0)
    throw IllegalArgument("Kernel::KernelP");
  if(originex>=taillex || originey>=tailley)
    throw IllegalArgument("Kernel::KernelP");
  if(originex<0 || originey<0)
    throw IllegalArgument("Kernel::KernelP");

  _largeur = taillex;
  _hauteur = tailley;
  _originex = originex;
  _originey = originey;
  _isSeparable = false;


  _data.resize(getHeight() * getWidth());
  for(int i = 0; i<_data.getSize(); i++)
   _data[i] = 0.0f;

}

Kernel::Kernel(int taillex, int tailley, int originex, int originey, const float * data)
{
  if(data==NULL)
    throw NullPointer("Kernel::Kernel");

  if(taillex<=0 | tailley<=0)
    throw IllegalArgument("Kernel::Kernel");
  if(originex>=taillex || originey>=tailley)
    throw IllegalArgument("Kernel::Kernel");
  if(originex<0 || originey<0)
    throw IllegalArgument("Kernel::Kernel");

  _largeur = taillex;
  _hauteur = tailley;
  _originex = originex;
  _originey = originey;
  _isSeparable = false;


  _data.resize(getHeight() * getWidth());
  for(int i = 0; i< _data.getSize(); i++)
    _data[i] = data[i];

}

Kernel::Kernel(int taillex, int tailley, int originex, int originey, const float * datax, const float * datay)
{
  if(datax==NULL || datay==NULL)
    throw NullPointer("Kernel::Kernel");
  if(taillex<=0 || tailley<=0)
    throw IllegalArgument("Kernel::Kernel");
  if(originex>=taillex || originey>=tailley)
    throw IllegalArgument("Kernel::Kernel");
  if(originex<0 || originey<0)
    throw IllegalArgument("Kernel::Kernel");

  _largeur = taillex;
  _hauteur = tailley;
  _originex = originex;
  _originey = originey;
  _isSeparable = true;


  _dataX.resize(getWidth());
  for(int i = 0; i< _dataX.getSize(); i++)
    _dataX[i] = datax[i];

  _dataY.resize(getHeight());
  for(int i = 0; i< _dataX.getSize(); i++)
    _dataY[i] = datay[i];


}

Kernel & Kernel::operator=(Kernel& origine)
{
  if(origine.getHeight() != getHeight() | origine.getWidth() != getWidth())
  {
    throw IllegalArgument("Kernel::operator=");
  }

  _originex = origine.getXOrigin();
  _originey = origine.getYOrigin();

  if(origine.isSeparable())
  {
    _dataX = origine._dataX;
    _dataY = origine._dataY;
  }
  else
  {
    _data = origine._data;
  }


  _isSeparable = origine.isSeparable();
  return (*this);
}

Kernel::Kernel(const Kernel& origine)
{

  _originex = origine.getXOrigin();
  _originey = origine.getYOrigin();
  _largeur = origine.getWidth();
  _hauteur = origine.getHeight();

  if(origine.isSeparable())
  {
    _dataX = origine._dataX;
    _dataY = origine._dataY;
  }
  else
  {
    _data = origine._data;
  }

  _isSeparable = origine.isSeparable();

}

bool Kernel::isSeparable() const
{
  return _isSeparable;
}

Kernel::~Kernel()
{
}

int Kernel::getXOrigin() const
{
  return _originex;
}

int Kernel::getYOrigin() const
{
  return _originey;
}

int Kernel::getWidth() const
{
  return _largeur;
}

int Kernel::getHeight() const
{
  return _hauteur;
}


float   Kernel::operator()(int x, int y) const
{
  if(isSeparable())
    return (_dataX[x] * _dataY[y]);
  else
    return(_data[y * getWidth() + x]);
}

void Kernel::setValue(int x, int y, float value)
{
  if(isSeparable())
    throw IllegalArgument("Kernel is separable, no sense !");
  else
   _data[y * getWidth() + x] = value;

}

int Kernel::getTopPadding() const
{
  return getYOrigin();
}

int Kernel::getBottomPadding() const
{
  return getHeight() - getYOrigin()-1;
}

int Kernel::getLeftPadding() const
{
  return getXOrigin();
}

int Kernel::getRightPadding() const
{
  return getWidth() - getXOrigin()-1;
}

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