/*
Copyright (C) 2006 Pedro Felzenszwalb

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
*/

/* a simple image class */

#ifndef IMAGE_H
#define IMAGE_H

#include <cstring>
#include <misc.h>
/*
template <class T>
class image {
 public:
  
  image(const int width, const int height, const bool init = true);

  
  ~image();

  
  void init(const T &val);

  image<T> *copy() const;
  
  int width() const { return w; }
  
  int height() const { return h; }
  
  T *data;
  
  T **access;
  
 private:
  int w, h;
};
*/

typedef struct{
	int w,h;
	rgb *data;
	rgb **access;
}image;

typedef struct{
        int w,h;
        float *data;
        float **access;
}imagef;

image *image_construct(const int width, const int height, const bool init);
void image_destruct(image *self){
	free(self->data);
	free(self->access);
	free(self);
}
void image_init(image *self,const rgb *val);
image *image_copy(image *self);
int image_width(image *self){return self->w;}
int image_height(image *self){return self->h;}

/* use imRef to access image data. */
#define imRef(im, x, y) (im->access[y][x])
  
/* use imPtr to get pointer to image data. */
#define imPtr(im, x, y) &(im->access[y][x])

image *image_construct(const int width, const int height, const bool init) {
  image *self = (image *)malloc(sizeof(image));
  self->w = width;
  self->h = height;
  self->data = (rgb *)malloc(self->w * self->h * sizeof(rgb));  // allocate space for image data
  self->access = (rgb **)malloc(self->h* sizeof (rgb *));   // allocate space for row pointers
  
  // initialize row pointers
  for (int i = 0; i < self->h; i++)
    self->access[i] = self->data + (i * self->w);  
  
  if (init)
    memset(self->data, 0, self->w * self->h * sizeof(rgb));
  return self;
}

void image_init(image *self,const rgb *val){
	rgb *ptr = imPtr(self,0,0);
	rgb *end = imPtr(self,self->w-1, self->h -1);
	while (ptr <=end)
	   *ptr++ = *val;
}

image * image_copy(image *self){
	image *im = image_construct(self->w, self->h,false);
	memcpy(im->data, self->data, self->w * self->h *sizeof(rgb));
	return im;
}

//imagef

imagef *imagef_construct(const int width, const int height, const bool init);
void imagef_destruct(imagef *self){
        free(self->data);
        free(self->access);
        free(self);
}
void imagef_init(imagef *self,const float *val);
imagef *imagef_copy(imagef *self);
int imagef_width(imagef *self){return self->w;}
int imagef_height(imagef *self){return self->h;}

/* use imRef to access image data. */
#define imRef(im, x, y) (im->access[y][x])

/* use imPtr to get pointer to image data. */
#define imPtr(im, x, y) &(im->access[y][x])

imagef *imagef_construct(const int width, const int height, const bool init) {
  imagef *self = (imagef *)malloc(sizeof(imagef));
  self->w = width;
  self->h = height;
  self->data = (float *)malloc(self->w * self->h * sizeof(float));  // allocate space for image data
  self->access = (float **)malloc(self->h* sizeof (float *));   // allocate space for row pointers

  // initialize row pointers
  for (int i = 0; i < self->h; i++)
    self->access[i] = self->data + (i * self->w);
  
  if (init)
    memset(self->data, 0, self->w * self->h * sizeof(float));
  return self;
}
  
void imagef_init(imagef *self,const float *val){
  float *ptr = imPtr(self,0,0);
  float *end = imPtr(self,self->w-1, self->h -1);
  while (ptr <=end)
    *ptr++ = *val;
                                                 
}

imagef * imagef_copy(image *self){
        imagef *im = imagef_construct(self->w, self->h,false);
        memcpy(im->data, self->data, self->w * self->h *sizeof(float));
        return im;
}

#endif