1 files changed, 76 insertions, 0 deletions
diff --git a/converter/pbm/pbmtoplot.c b/converter/pbm/pbmtoplot.c
new file mode 100644
index 00000000..8c9075b2
--- /dev/null
+++ b/converter/pbm/pbmtoplot.c
@@ -0,0 +1,76 @@
+/* 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 );
+    }