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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 ARGS((int i));
- static void
- puttwo( i )
- int i;
- {
- (void) putchar(i);
- (void) putchar(i >> 8);
- }
-
- int
- main( argc, argv )
- int argc;
- char* argv[];
- {
- FILE* ifp;
- register bit** bits;
- register 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 );
- }
-