image.h

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#ifndef _IMAGEN_H_
#define _IMAGEN_H_
 
 
#include <cstdlib>
#include "imageIO.h"
 
 
typedef unsigned char byte;
 
 
enum LoadResult: unsigned char {
    SUCCESS,
    NOT_PGM,
    READING_ERROR
};
 
 
class Image{
 
private :
 
    byte **img;
 
    int rows;
 
 
    int cols;
 
    byte * orgn_ptr;
 
    void Initialize (int nrows= 0, int ncols= 0, byte *buffer= 0);
 
    LoadResult LoadFromPGM(const char * file_path);
 
    void Copy(const Image &orig);
 
    void Allocate(int nrows, int ncols, byte * buffer = 0);
 
    void Destroy();
 
public :
 
    Image();
 
    Image(int nrows, int ncols, byte value=0);
 
    Image (const Image & orig);
 
    ~Image() ;
 
    Image & operator= (const Image & orig);
 
    bool Empty() const;
 
    int get_rows() const;
 
    int get_cols() const;
 
    int size() const;
 
void set_pixel (int i, int j, byte value);
 
    byte get_pixel (int i, int j) const;
 
    byte get_pixel (int k) const;
 
    void set_pixel (int k, byte value);
 
    bool Save (const char * file_path) const;
 
    bool MySave (const char *file_path) const;
 
    bool Load (const char * file_path);
 
    void Invert();
 
    void AdjustContrast (byte in1, byte in2, byte out1, byte out2);
 
 
    double Mean (int i, int j, int height, int width) const;
 
    Image Subsample(int factor) const;
 
    Image Crop(int nrow, int ncol, int height, int width) const;
 
    Image Zoom2X() const;
 
 
 
    void ShuffleRows_noeff();
 
     void ShuffleRows_eff();
 
 
    bool operator==(const Image & other) const;
} ;
 
 
#endif // _IMAGEN_H_