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channel.cpp

/**********************************************************************************
* Copyright (c) 2003, Christoph Rueegg <opendev@cdrnet.ch> and Matthias Bader     *
* All rights reserved.                                                            *
*                                                                                 *
* Project Website: http://www.cdrnet.net/projects/painter/                        *
*                                                                                 *
* Redistribution and use in source and binary forms, with or without modification,*
* are permitted provided that the following conditions are met:                   *
*                                                                                 *
* 1. Redistributions of source code must retain the above copyright notice,       *
* this list of conditions and the following disclaimer.                           *
*                                                                                 *
* 2. Redistributions in binary form must reproduce the above copyright notice,    *
* this list of conditions and the following disclaimer in the documentation       *
* and/or other materials provided with the distribution.                          *
*                                                                                 *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"     *
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE       *
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE      *
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE        *
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR             *
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF          *
* THE POSSIBILITY OF SUCH DAMAGE.                                                 *
**********************************************************************************/

#ifndef __CHANNEL_GNX__
#define __CHANNEL_GNX__

//NOTE: no separated headerfiles = generics workaround (missing support for token 'extern')

#include <stdlib.h>
#include <iostream>
using namespace std;

template<class T>
class Channel
{
private:
  T *data;
  int id;
protected:
  int width;
  int height;
public:
  Channel(const int height, const int width);
  Channel();
  virtual ~Channel();
  virtual int GetId();
  virtual void SetId(const int id);
  virtual inline T Get(const int x, const int y);
  virtual inline void Set(const int x, const int y, const T val);
  virtual inline int GetWidth();
  virtual inline int GetHeight();
  virtual Channel<T>* EmptyClone();
  virtual T** GetRawData();
  virtual void ResetChannel();
  virtual void Normalize(int* x, int* y);
  virtual void Normalize(int* topleftx, int* toplefty, int* bottomrightx, int* bottomrighty);
};


template<class T>
Channel<T>::Channel(const int height, const int width)
{
  data = new T[width*height];
  this->height=height;
  this->width=width;
  id = 0;
}

template<class T>
Channel<T>::Channel()
{
  data = 0;
  id = 0;
}

template<class T>
Channel<T>::~Channel()
{
  if(data != 0) //avoid undefined behavior (=crash) on mixed single/field pointers
    delete [] data;
}

template<class T>
void Channel<T>::SetId(const int id)
{
  this->id = id;
}

template<class T>
int Channel<T>::GetId()
{
  return(id);
}

template<class T>
inline T Channel<T>::Get(const int x, const int y)
{
  //if(x<0||y<0||x>=width||y>=height)
  //{
  //  cerr << "ILLEGALGET[" << x << "|" << y << "]";
  //  return 0;
  //}
  return(data[x+y*width]);
}

template<class T>
inline void Channel<T>::Set(const int x, const int y, const T val)
{
  //if(x<0||y<0||x>=width||y>=height)
  //{
  //  cerr << "ILLEGALSET[" << x << "|" << y << "]";
  //  return;
  //}
  data[x+y*width] = val;
}


template<class T>
inline int Channel<T>::GetWidth()
{
  return(width);
}

template<class T>
inline int Channel<T>::GetHeight()
{
  return(height);
}

template<class T>
T** Channel<T>::GetRawData()
{
  return(&data);
}

template<class T>
Channel<T>* Channel<T>::EmptyClone()
{
  Channel<T> *copy = new Channel<T>(height,width);
  return(copy);
}

template<class T>
void Channel<T>::ResetChannel()
{
}

template<class T>
void Channel<T>::Normalize(int* x, int* y)

{

  if(*x<0)
    *x = 0;
  if(*y<0)
    *y = 0;
  if(*x >= width)
    *x = width-1;
  if(*y >= height)
    *y = height-1;
}

template<class T>

void Channel<T>::Normalize(int* topleftx, int* toplefty, int* bottomrightx, int* bottomrighty)
{
  int temp;
  Normalize(topleftx,toplefty);
  Normalize(bottomrightx,bottomrighty);
  if(*topleftx > *bottomrightx)
  {
    temp = *topleftx;
    *topleftx = *bottomrightx;
    *bottomrightx = temp;
  }
  if(*toplefty > *bottomrighty)
  {
    temp = *toplefty;
    *toplefty = *bottomrighty;
    *bottomrighty = temp;
  }
}

#endif

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