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PBM_PLUS
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pgm
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pgm.h
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C/C++ Source or Header
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1980-12-04
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1KB
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38 lines
/* pgm.h - header file for libpgm portable graymap library
*/
#ifndef _PGM_H_
#define _PGM_H_
#include "pbm.h"
#ifdef PGM_BIGGRAYS
typedef unsigned short gray;
#define PGM_MAXMAXVAL 65535
#else PGM_BIGGRAYS
typedef unsigned char gray;
#define PGM_MAXMAXVAL 255
#endif PGM_BIGGRAYS
/* Declarations of routines. */
#define pgm_allocarray( cols, rows ) ((gray **) pm_allocarray( cols, rows, sizeof(gray) ))
#define pgm_allocrow( cols ) ((gray *) pm_allocrow( cols, sizeof(gray) ))
#define pgm_freearray( grayrow, rows ) pm_freearray( grayrow, rows )
#define pgm_freerow( grayrow ) pm_freerow( grayrow )
gray **pgm_readpgm( /* FILE *file, int *colsP, int *rowsP, gray *maxvalP */ );
void pgm_readpgminit( /* FILE *file, int *colsP, int *rowsP, gray *maxvalP, int *formatP */ );
void pgm_readpgmrow( /* FILE *file, gray *grayrow, int cols, gray maxval, int format */ );
void pgm_writepgm( /* FILE *file, gray **grays, int cols, int rows, gray maxval */ );
void pgm_writepgminit( /* FILE *file, int cols, int rows, gray maxval */ );
void pgm_writepgmrow( /* FILE *file, gray *grayrow, int cols, gray maxval */ );
extern gray pgm_pbmmaxval;
/* This is the maxval used when a PGM program reads a PBM file. Normally
** it is 1; however, for some programs, a larger value gives better results
*/
#endif _PGM_H_