image_class.h

#ifndef CLASS_INCLUDED
#define CLASS_INCLUDED

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


//============================================================================
//                           Class declaration
//============================================================================
class Image
{
private:
	u_char* data;
  int width;
  int height;

public:
  // Getters
  int getWidth() const;
  int getHeight() const;
  u_char* getData() const;

  // Default constructor
  Image();

  // Copy constructor
  Image(const Image& old_one);

  // Destructor
  ~Image();

  // Write the image contained in <my_image.data> (of size <my_image.width>
	// * <my_image.height>) into plain RGB ppm file at <file_name>
	void ppm_write_to_file(const char* file_name);

	// Read the image contained in plain RGB ppm file at <file_name>
	// into <my_image.data> and set <my_image.width> and <my_image.height> 
	// accordingly
	// Warning: data is malloc_ed, don't forget to free it
	void ppm_read_from_file(const char* file_name);

	// Desaturate (transform to B&W) <my_image>
	void ppm_desaturate();

	// Shrink image (of original size <my_image.width> * <my_image.height>)
	// by factor <factor> (<my_image> updated accordingly)
	void ppm_shrink(int factor);
};

#endif