--- ray/src/px/pfilt.c	1992/10/02 16:24:06	2.5
+++ ray/src/px/pfilt.c	1993/06/18 16:20:16	2.8
@@ -10,14 +10,8 @@ static char SCCSid[] = "$SunId$ LBL";
  *     9/26/85
  */
 
-#include  <stdio.h>
+#include  "standard.h"
 
-#ifdef MSDOS
-#include  <fcntl.h>
-#endif
-
-#include  <math.h>
-
 #include  <signal.h>
 
 #include  "color.h"
@@ -26,7 +20,6 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  "paths.h"
 
-extern char  *malloc();
 extern float  *matchlamp();
 
 #define	 FEQ(a,b)	((a) >= .98*(b) && (a) <= 1.02*(b))
@@ -47,7 +40,7 @@ int  singlepass = 0;		/* true means skip first pass */
 
 int  avghot = 0;		/* true means average in bright spots */
 
-double	hotlvl = 1000.0;	/* level considered "hot" */
+double	hotlvl = 100.0;		/* level considered "hot" */
 
 int  npts = 0;			/* (half) number of points for stars */
 
@@ -104,7 +97,7 @@ char  **argv;
 	signal(SIGXFSZ, quit);
 #endif
 
-	progname = argv[0];
+	progname = argv[0] = fixargv0(argv[0]);
 
 	for (i = 1; i < argc; i++)
 		if (argv[i][0] == '-')
@@ -299,6 +292,8 @@ char  *s;
 	fputs(s, stdout);		/* copy to output */
 	if (isaspect(s))		/* get aspect ratio */
 		inpaspect *= aspectval(s);
+	else if (isexpos(s))
+		hotlvl *= exposval(s);
 	else if (isformat(s)) {
 		formatval(fmt, s);
 		wrongformat = strcmp(fmt, COLRFMT);
@@ -336,13 +331,13 @@ FILE  *in;
 	}
 	for (i = 0; i < yres; i++) {
 		if (freadscan(scan, xres, in) < 0) {
-			nrows = nrows * i / yres;	/* adjust frame */
+			nrows = (long)nrows * i / yres;	/* adjust frame */
 			if (nrows <= 0) {
 				fprintf(stderr, "%s: empty frame\n", progname);
 				quit(1);
 			}
 			fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
-					progname, 100*i/yres);
+					progname, (int)(100L*i/yres));
 			yres = i;
 			y_r = (double)nrows/yres;
 			break;