--- ray/src/px/pfilt.c	2010/09/03 21:18:15	2.31
+++ ray/src/px/pfilt.c	2023/12/07 21:15:54	2.35
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: pfilt.c,v 2.31 2010/09/03 21:18:15 greg Exp $";
+static const char RCSid[] = "$Id: pfilt.c,v 2.35 2023/12/07 21:15:54 greg Exp $";
 #endif
 /*
  *  pfilt.c - program to post-process picture file.
@@ -11,17 +11,11 @@ static const char RCSid[] = "$Id: pfilt.c,v 2.31 2010/
 #include  "copyright.h"
 
 #include  <signal.h>
-#include  <string.h>
-
+#include  "pfilt.h"
 #include  "platform.h"
-#include  "standard.h"
-#include  "rtio.h"
-#include  "color.h"
-#include  "view.h"
 #include  "paths.h"
-#include  "pfilt.h"
+#include  "view.h"
 
-
 #define	 FEQ(a,b)	((a) >= .98*(b) && (a) <= 1.02*(b))
 
 double	 CHECKRAD = 2.0;	/* radius to check for filtering */
@@ -348,7 +342,7 @@ headline(				/* process line from header */
 	void	*p
 )
 {
-	char  fmt[32];
+	char  fmt[MAXFMTLEN];
 
 	fputs(s, stdout);		/* copy to output */
 	if (isaspect(s))		/* get aspect ratio */
@@ -371,11 +365,11 @@ headline(				/* process line from header */
 
 static void
 copyfile(			/* copy a file */
-	register FILE  *in,
-	register FILE  *out
+	FILE  *in,
+	FILE  *out
 )
 {
-	register int  c;
+	int  c;
 
 	while ((c = getc(in)) != EOF)
 		putc(c, out);
@@ -480,7 +474,7 @@ scan2init(void)			/* prepare scanline arrays */
 {
 	COLOR	ctmp;
 	double	d;
-	register int  i;
+	int  i;
 
 	xbrad = xres/ncols/2 + 1;
 	ybrad = yres/nrows/2 + 1;
@@ -561,7 +555,7 @@ scan2sync(			/* synchronize grey averages and output s
 	static int  nextrow = 0;
 	COLOR  ctmp;
 	int  ybot;
-	register int  c;
+	int  c;
 					/* average input scanlines */
 	while (nextrow <= r+orad && nextrow < nrows) {
 		ybot = (nextrow+.5)*yres/nrows;
@@ -584,7 +578,7 @@ scan2sync(			/* synchronize grey averages and output s
 static void
 scan2flush(void)			/* flush output buffer */
 {
-	register int  r;
+	int  r;
 
 	for (r = nrows-orad; r < nrows; r++)
 		if (fwritescan(scoutbar[r%obarsize], ncols, stdout) < 0)