/*  tiff_io.h  */

#define II       1
#define MM       2  
#define BYTE     1 
#define ASCII    2
#define SHORT    3
#define LONG     4
#define RATIONAL 5
    
/* 
  Header structure: 
*/

typedef struct {
  short int  byte_order;
  short int  version;
  long int   ifd_offset;
} TIFF_HEADER;

/* 
  Pointer structure: 
*/

typedef struct {
  short int  tag;
  short int  type;
  long int   length;
  long int   voff;
} TIFF_POINTER;

/* 
  File information structure: 
*/

typedef struct {
  long int   iimm;
  long int   subfile_flags;
  long int   photo_interp;
  long int   planar_config;
  short int  bits_sample[3];
  short int  sample_pixel;
  long int   rows_strip;
  long int   strip_cnt_length;
  long int   strip_cnt_offset;
  long int   strip_off_length;
  long int   strip_off_offset;
} TIFF_DATA;

/******************************************************************************/
/*
  Function prototypes.
*/
/******************************************************************************/

short int      ii2mms ( short int input );

long int       ii2mml ( long int input );

unsigned char *make_tag ( short int tag, short int type, long int lng, 
                 long int fld, unsigned char *b, char *cnt );

int            read_tiff_data ( FILE *fp, long int xs, long int ys,
                 long int pl, TIFF_DATA td, unsigned char *r, unsigned char *g, 
                 unsigned char *b );

int            read_tiff_header ( FILE *fp, long int *xs, long int *ys, 
                 long int *pl, TIFF_DATA *td );

void           strip_read ( FILE *fp, long int im, long int xs, long int pl, 
                 long int sco, long int scf, long int soo, long int sof, 
                 unsigned char *line, unsigned char *r, unsigned char *g, 
                 unsigned char *b, long int *lng );

void           write_tiff_data ( FILE *fp, long int xs, long int ys, 
                 long int pl, unsigned char *r, unsigned char *g, 
                 unsigned char *b );

void           write_tiff_header ( FILE *fp, long int xs, long int ys, 
                 long int pl );