--- ray/src/px/ra_t16.c	1991/11/12 16:04:21	2.1
+++ ray/src/px/ra_t16.c	1992/10/30 09:11:36	2.4
@@ -13,6 +13,12 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  <stdio.h>
 
+#ifdef MSDOS
+#include  <fcntl.h>
+#endif
+
+#include  <math.h>
+
 #include  "color.h"
 
 #include  "resolu.h"
@@ -34,10 +40,8 @@ static char SCCSid[] = "$SunId$ LBL";
 
 extern char	*ecalloc(), *emalloc();
 
-extern double  atof(), pow();
+double	gamcor = 2.2;			/* gamma correction */
 
-double	gamma = 2.2;			/* gamma correction */
-
 int  bradj = 0;				/* brightness adjustment */
 
 char  *progname;
@@ -52,7 +56,12 @@ char  *argv[];
 	struct hdStruct  head;
 	int  reverse = 0;
 	int  i;
-	
+#ifdef MSDOS
+	extern int  _fmode;
+	_fmode = O_BINARY;
+	setmode(fileno(stdin), O_BINARY);
+	setmode(fileno(stdout), O_BINARY);
+#endif
 	progname = argv[0];
 
 	head.dataBits = 16;
@@ -60,7 +69,7 @@ char  *argv[];
 		if (argv[i][0] == '-')
 			switch (argv[i][1]) {
 			case 'g':
-				gamma = atof(argv[++i]);
+				gamcor = atof(argv[++i]);
 				break;
 			case 'r':
 				reverse = !reverse;
@@ -95,7 +104,7 @@ char  *argv[];
 		quiterr(msg);
 	}
 					/* set gamma */
-	setcolrgam(gamma);
+	setcolrgam(gamcor);
 					/* convert */
 	if (reverse) {
 					/* get header */