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/* pbmtoplot.c - read a portable bitmap and produce a UNIX-format plot file.
**
** Copyright (C) 1990 by Arthur David Olson.
**
** 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"
static void
puttwo(int const i)
{
(void) putchar(i);
(void) putchar(i >> 8);
}
int
main(int argc, char * argv[]) {
FILE* ifp;
bit** bits;
int row, col, scol;
int rows, cols;
pbm_init( &argc, argv );
if ( argc > 2 )
pm_usage( "[pbmfile]" );
ifp = (argc == 2) ? pm_openr( argv[1] ) : stdin;
bits = pbm_readpbm( ifp, &cols, &rows );
pm_close( ifp );
(void) putchar( 's' );
puttwo( 0 );
puttwo( 0 );
puttwo( rows - 1 );
puttwo( cols - 1 );
for ( row = 0; row < rows; ++row )
{
for ( col = 0; col < cols; ++col )
{
if ( bits[row][col] == PBM_WHITE )
continue;
scol = col;
while ( ++col < cols && bits[row][col] == PBM_BLACK )
; /* nothing */
--col;
if ( col == scol )
(void) putchar( 'p' );
else
{
(void) putchar( 'l' );
puttwo( scol );
puttwo( rows - 1 - row );
}
puttwo( col );
puttwo( rows - 1 - row );
}
}
exit( 0 );
}
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