/* pnm.h - header file for libpnm portable anymap library
*/

#ifndef _PNM_H_
#define _PNM_H_

#include "ppm.h"
typedef pixel xel;
typedef pixval xelval;
#define PNM_MAXMAXVAL PPM_MAXMAXVAL
#define PNM_GET1(x) PPM_GETB(x)
#define PNM_ASSIGN1(x,v) PPM_ASSIGN(x,0,0,v)
#define PNM_EQUAL(x,y) PPM_EQUAL(x,y)
#define PNM_FORMAT_TYPE(f) PPM_FORMAT_TYPE(f)

/* Declarations of routines. */

void pnm_init( int* argcP, char* argv[] );

#define pnm_allocarray( cols, rows ) ((xel**) pm_allocarray( cols, rows, sizeof(xel) ))
#define pnm_allocrow( cols ) ((xel*) pm_allocrow( cols, sizeof(xel) ))
#define pnm_freearray( xels, rows ) pm_freearray( (char**) xels, rows )
#define pnm_freerow( xelrow ) pm_freerow( (char*) xelrow )

xel** pnm_readpnm( FILE* file, int* colsP, int* rowsP, xelval* maxvalP, int* formatP );
void pnm_readpnminit( FILE* file, int* colsP, int* rowsP, xelval* maxvalP, int* formatP );
void pnm_readpnmrow( FILE* file, xel* xelrow, int cols, xelval maxval, int format );

void pnm_writepnm( FILE* file, xel** xels, int cols, int rows, xelval maxval, int format, int forceplain );
void pnm_writepnminit( FILE* file, int cols, int rows, xelval maxval, int format, int forceplain );
void pnm_writepnmrow( FILE* file, xel* xelrow, int cols, xelval maxval, int format, int forceplain );

xel pnm_backgroundxel( xel** xels, int cols, int rows, xelval maxval, int format );
xel pnm_backgroundxelrow( xel* xelrow, int cols, xelval maxval, int format );
xel pnm_whitexel( xelval maxval, int format );
xel pnm_blackxel( xelval maxval, int format );
void pnm_invertxel( xel* x, xelval maxval, int format );
void pnm_promoteformat( xel** xels, int cols, int rows, xelval maxval, int format, xelval newmaxval, int newformat );
void pnm_promoteformatrow( xel* xelrow, int cols, xelval maxval, int format, xelval newmaxval, int newformat );

extern xelval pnm_pbmmaxval;
/* This is the maxval used when a PNM program reads a PBM file.  Normally
** it is 1; however, for some programs, a larger value gives better results
*/

extern void pm_init_perm( unsigned long plen, unsigned long psize );
extern unsigned long pm_next_perm( void );
extern void pm_map_comps( int comp_r, int comp_g, int comp_b, int num_comps, int comp_map[] );

#endif /*_PNM_H_*/