--- ray/src/px/pvalue.c	1992/05/08 11:55:42	2.4
+++ ray/src/px/pvalue.c	1994/10/06 13:27:16	2.9
@@ -1,4 +1,4 @@
-/* Copyright (c) 1991 Regents of the University of California */
+/* Copyright (c) 1992 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -16,13 +16,13 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  "resolu.h"
 
-#define  min(a,b)		((a)<(b)?(a):(b))
+#define	 min(a,b)		((a)<(b)?(a):(b))
 
-RESOLU  picres;			/* resolution of picture */
+RESOLU	picres;			/* resolution of picture */
 
 int  uniq = 0;			/* print only unique values? */
 
-int  original = 0;		/* convert back to original values? */
+int  doexposure = 0;		/* exposure change? (>100 to print) */
 
 int  dataonly = 0;		/* data only format? */
 
@@ -37,9 +37,11 @@ int  header = 1;		/* do header? */
 
 int  resolution = 1;		/* put/get resolution string? */
 
+int  original = 0;		/* convert to original values? */
+
 int  wrongformat = 0;		/* wrong input format? */
 
-double  gamcor = 1.0;		/* gamma correction */
+double	gamcor = 1.0;		/* gamma correction */
 
 int  ord[3] = {RED, GRN, BLU};	/* RGB ordering */
 int  rord[4];			/* reverse ordering */
@@ -58,6 +60,7 @@ int  argc;
 char  **argv;
 {
 	extern int  checkhead();
+	double  d, expval = 1.0;
 	int  i;
 
 	progname = argv[0];
@@ -78,10 +81,21 @@ char  **argv;
 				original = argv[i][0] == '-';
 				break;
 			case 'g':		/* gamma correction */
-				gamcor = atof(argv[++i]);
+				gamcor = atof(argv[i+1]);
 				if (argv[i][0] == '+')
 					gamcor = 1.0/gamcor;
+				i++;
 				break;
+			case 'e':		/* exposure correction */
+				d = atof(argv[i+1]);
+				if (argv[i+1][0] == '-' || argv[i+1][0] == '+')
+					d = pow(2.0, d);
+				if (argv[i][0] == '-')
+					expval *= d;
+				scalecolor(exposure, d);
+				doexposure++;
+				i++;
+				break;
 			case 'R':		/* reverse byte sequence */
 				if (argv[i][0] == '-') {
 					ord[0]=BLU; ord[1]=GRN; ord[2]=RED;
@@ -127,12 +141,14 @@ char  **argv;
 				}
 				break;
 			case 'x':		/* x resolution */
+			case 'X':		/* x resolution */
 				resolution = 0;
 				if (argv[i][0] == '-')
 					picres.or |= XDECR;
 				picres.xr = atoi(argv[++i]);
 				break;
 			case 'y':		/* y resolution */
+			case 'Y':		/* y resolution */
 				resolution = 0;
 				if (argv[i][0] == '-')
 					picres.or |= YDECR;
@@ -176,11 +192,20 @@ unkopt:
 	set_io();
 
 	if (reverse) {
+#ifdef MSDOS
+		setmode(fileno(stdout), O_BINARY);
+		if (format != 'a' && format != 'i')
+			setmode(fileno(fin), O_BINARY);
+#endif
 					/* get header */
-		if (header && checkheader(fin, fmtid, stdout) < 0) {
-			fprintf(stderr, "%s: wrong input format\n", progname);
-			quit(1);
-		}
+		if (header) {
+			if (checkheader(fin, fmtid, stdout) < 0) {
+				fprintf(stderr, "%s: wrong input format\n",
+						progname);
+				quit(1);
+			}
+		} else
+			newheader("RADIANCE", stdout);
 					/* get resolution */
 		if ((resolution && !fgetsresolu(&picres, fin)) ||
 				picres.xr <= 0 || picres.yr <= 0) {
@@ -189,11 +214,18 @@ unkopt:
 		}
 						/* add to header */
 		printargs(i, argv, stdout);
+		if (expval < .99 || expval > 1.01)
+			fputexpos(expval, stdout);
 		fputformat(COLRFMT, stdout);
 		putchar('\n');
 		fputsresolu(&picres, stdout);	/* always put resolution */
 		valtopix();
 	} else {
+#ifdef MSDOS
+		setmode(fileno(fin), O_BINARY);
+		if (format != 'a' && format != 'i')
+			setmode(fileno(stdout), O_BINARY);
+#endif
 						/* get header */
 		getheader(fin, checkhead, NULL);
 		if (wrongformat) {
@@ -207,6 +239,8 @@ unkopt:
 		}
 		if (header) {
 			printargs(i, argv, stdout);
+			if (expval < .99 || expval > 1.01)
+				fputexpos(expval, stdout);
 			fputformat(fmtid, stdout);
 			putchar('\n');
 		}
@@ -226,17 +260,18 @@ char  *line;
 	double	d;
 	COLOR	ctmp;
 
-	if (isformat(line)) {
-		formatval(fmt, line);
+	if (formatval(fmt, line))
 		wrongformat = strcmp(fmt, COLRFMT);
-	} else if (original && isexpos(line)) {
+	else if (original && isexpos(line)) {
 		d = 1.0/exposval(line);
 		scalecolor(exposure, d);
+		doexposure++;
 	} else if (original && iscolcor(line)) {
 		colcorval(ctmp, line);
 		setcolor(exposure, colval(exposure,RED)/colval(ctmp,RED),
 				colval(exposure,GRN)/colval(ctmp,GRN),
 				colval(exposure,BLU)/colval(ctmp,BLU));
+		doexposure++;
 	} else if (header)
 		fputs(line, stdout);
 }
@@ -244,7 +279,7 @@ char  *line;
 
 pixtoval()				/* convert picture to values */
 {
-	register COLOR  *scanln;
+	register COLOR	*scanln;
 	int  dogamma;
 	COLOR  lastc;
 	FLOAT  hv[2];
@@ -274,7 +309,7 @@ pixtoval()				/* convert picture to values */
 					continue;
 				else
 					copycolor(lastc, scanln[x]);
-			if (original)
+			if (doexposure)
 				multcolor(scanln[x], exposure);
 			if (dogamma)
 				setcolor(scanln[x],
@@ -299,7 +334,7 @@ pixtoval()				/* convert picture to values */
 valtopix()			/* convert values to a pixel file */
 {
 	int  dogamma;
-	register COLOR  *scanln;
+	register COLOR	*scanln;
 	int  y;
 	register int  x;
 
@@ -322,6 +357,8 @@ valtopix()			/* convert values to a pixel file */
 					pow(colval(scanln[x],RED), gamcor),
 					pow(colval(scanln[x],GRN), gamcor),
 					pow(colval(scanln[x],BLU), gamcor));
+			if (doexposure)
+				multcolor(scanln[x], exposure);
 		}
 		if (fwritescan(scanln, scanlen(&picres), stdout) < 0) {
 			fprintf(stderr, "%s: write error\n", progname);
@@ -343,7 +380,7 @@ getcascii(col, fp)		/* get an ascii color value from f
 COLOR  col;
 FILE  *fp;
 {
-	double  vd[3];
+	double	vd[3];
 
 	if (fscanf(fp, "%lf %lf %lf", &vd[0], &vd[1], &vd[2]) != 3)
 		return(-1);
@@ -356,7 +393,7 @@ getcdouble(col, fp)		/* get a double color value from 
 COLOR  col;
 FILE  *fp;
 {
-	double  vd[3];
+	double	vd[3];
 
 	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
 		return(-1);
@@ -410,7 +447,7 @@ getbascii(col, fp)		/* get an ascii brightness value f
 COLOR  col;
 FILE  *fp;
 {
-	double  vd;
+	double	vd;
 
 	if (fscanf(fp, "%lf", &vd) != 1)
 		return(-1);
@@ -423,7 +460,7 @@ getbdouble(col, fp)		/* get a double brightness value 
 COLOR  col;
 FILE  *fp;
 {
-	double  vd;
+	double	vd;
 
 	if (fread((char *)&vd, sizeof(double), 1, fp) != 1)
 		return(-1);
@@ -450,7 +487,7 @@ COLOR  col;
 FILE  *fp;
 {
 	int  vi;
-	double  d;
+	double	d;
 
 	if (fscanf(fp, "%d", &vi) != 1)
 		return(-1);
@@ -465,7 +502,7 @@ COLOR  col;
 FILE  *fp;
 {
 	BYTE  vb;
-	double  d;
+	double	d;
 
 	if (fread((char *)&vb, sizeof(BYTE), 1, fp) != 1)
 		return(-1);
@@ -507,7 +544,7 @@ putcdouble(col, fp)			/* put a double color to fp */
 COLOR  col;
 FILE  *fp;
 {
-	double  vd[3];
+	double	vd[3];
 
 	vd[0] = colval(col,ord[0]);
 	vd[1] = colval(col,ord[1]);
@@ -577,7 +614,7 @@ putbdouble(col, fp)			/* put a double brightness to fp
 COLOR  col;
 FILE  *fp;
 {
-	double  vd;
+	double	vd;
 
 	vd = bright(col);
 	fwrite((char *)&vd, sizeof(double), 1, fp);