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libpbm3.c
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C/C++ Source or Header
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1990-05-31
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93 lines
/* libpbm3.c - pbm utility library part 3
**
** Copyright (C) 1988 by Jef Poskanzer.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
*/
#include <stdio.h>
#include "pbm.h"
#include "libpbm.h"
void
pbm_writepbminit( file, cols, rows )
FILE *file;
int cols, rows;
{
#ifdef PBMPLUS_RAWBITS
fprintf( file, "%c%c\n%d %d\n", PBM_MAGIC1, RPBM_MAGIC2, cols, rows );
#else /*PBMPLUS_RAWBITS*/
fprintf( file, "%c%c\n%d %d\n", PBM_MAGIC1, PBM_MAGIC2, cols, rows );
#endif /*PBMPLUS_RAWBITS*/
}
void
pbm_writepbmrow( file, bitrow, cols )
FILE *file;
bit *bitrow;
int cols;
{
#ifdef PBMPLUS_RAWBITS
register int col, bitshift;
register unsigned char item;
register bit *bP;
bitshift = 7;
item = 0;
for ( col = 0, bP = bitrow; col < cols; col++, bP++ )
{
if ( *bP )
item += 1 << bitshift;
bitshift--;
if ( bitshift == -1 )
{
if ( putc( item, file ) == EOF )
pm_perror( 0 );
bitshift = 7;
item = 0;
}
}
if ( bitshift != 7 )
if ( putc( item, file ) == EOF )
pm_perror( 0 );
#else /*PBMPLUS_RAWBITS*/
register int col, charcount;
register bit *bP;
charcount = 0;
for ( col = 0, bP = bitrow; col < cols; col++, bP++ )
{
if ( charcount >= 70 )
{
if ( putc( '\n', file ) == EOF )
pm_perror( 0 );
charcount = 0;
}
if ( putc( *bP ? '1' : '0', file ) == EOF )
pm_perror( 0 );
charcount++;
}
if ( putc( '\n', file ) == EOF )
pm_perror( 0 );
#endif /*PBMPLUS_RAWBITS*/
}
void
pbm_writepbm( file, bits, cols, rows )
FILE *file;
bit **bits;
int cols, rows;
{
int row;
pbm_writepbminit( file, cols, rows );
for ( row = 0; row < rows; row++ )
pbm_writepbmrow( file, bits[row], cols );
}