--- ray/src/px/protate.c	1990/06/26 09:09:35	1.5
+++ ray/src/px/protate.c	1991/04/18 14:42:06	1.8
@@ -9,21 +9,39 @@ static char SCCSid[] = "$SunId$ LBL";
  *	2/26/88
  */
 
-#include <stdio.h>
+#include "standard.h"
 
 #include "color.h"
 
 int	xres, yres;			/* input resolution */
+double	inpaspect = 1.0;		/* input aspect ratio */
 
 char	buf[1<<20];			/* output buffer */
 
 int	nrows;				/* number of rows output at once */
 
+int	wrongformat = 0;
+
 #define scanbar		((COLR *)buf)
 
 char	*progname;
 
 
+headline(s)				/* process line from header */
+char	*s;
+{
+	char	fmt[32];
+
+	fputs(s, stdout);
+	if (isaspect(s))
+		inpaspect *= aspectval(s);
+	else if (isformat(s)) {
+		formatval(fmt, s);
+		wrongformat = strcmp(fmt, COLRFMT);
+	}
+}
+
+
 main(argc, argv)
 int	argc;
 char	*argv[];
@@ -44,9 +62,15 @@ char	*argv[];
 		fprintf(stderr, "%s: cannot open\n", argv[2]);
 		exit(1);
 	}
-					/* copy header */
-	copyheader(fin, stdout);
+					/* transfer header */
+	getheader(fin, headline, NULL);
+	if (wrongformat) {
+		fprintf(stderr, "%s: wrong picture format\n", progname);
+		exit(1);
+	}
 					/* add new header info. */
+	if (inpaspect < .99 || inpaspect > 1.01)
+		fputaspect(1./inpaspect/inpaspect, stdout);
 	printf("%s\n\n", progname);
 					/* get picture size */
 	if (fgetresolu(&xres, &yres, fin) != (YMAJOR|YDECR)) {