--- ray/src/px/ra_bn.c	1990/06/20 09:17:32	1.5
+++ ray/src/px/ra_bn.c	1991/11/11 14:01:48	1.9
@@ -1,4 +1,4 @@
-/* Copyright (c) 1986 Regents of the University of California */
+/* Copyright (c) 1991 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -14,10 +14,14 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  "color.h"
 
+#include  "resolu.h"
+
 extern double  atof(), pow();
 
 double	gamma = 2.0;			/* gamma correction */
 
+int  bradj = 0;				/* brightness adjustment */
+
 char  *progname;
 
 char  errmsg[128];
@@ -45,11 +49,18 @@ char  *argv[];
 			case 'r':
 				reverse = !reverse;
 				break;
+			case 'e':
+				if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
+					goto userr;
+				bradj = atoi(argv[++i]);
+				break;
 			default:
 				goto userr;
 			}
 		else
 			break;
+						/* set gamma correction */
+	setcolrgam(gamma);
 
 	if (reverse) {
 		if (i > argc-1 || i < argc-2)
@@ -67,8 +78,9 @@ char  *argv[];
 		}
 					/* put header */
 		printargs(i, argv, rafp);
+		fputformat(COLRFMT, rafp);
 		putc('\n', rafp);
-		fputresolu(YMAJOR|YDECR, xmax, ymax, rafp);
+		fprtresolu(xmax, ymax, rafp);
 					/* convert file */
 		bn2ra();
 	} else {
@@ -82,8 +94,8 @@ char  *argv[];
 			quiterr(errmsg);
 		}
 					/* get header */
-		getheader(rafp, NULL);
-		if (fgetresolu(&xmax, &ymax, rafp) != (YMAJOR|YDECR))
+		if (checkheader(rafp, COLRFMT, NULL) < 0 ||
+				fgetresolu(&xmax, &ymax, rafp) < 0)
 			quiterr("bad RADIANCE format");
 		if (openbarney(argv[i+1], "w") < 0) {
 			sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]);
@@ -94,9 +106,10 @@ char  *argv[];
 	}
 	quiterr(NULL);
 userr:
-	fprintf(stderr, "Usage: %s [-g gamma] {input|-} output\n", progname);
-	fprintf(stderr, "   or: %s -r [-g gamma] input [output|-]\n",
+	fprintf(stderr, "Usage: %s [-g gamma][-e +/-stops] {input|-} output\n",
 			progname);
+	fprintf(stderr, "   or: %s -r [-g gamma][-e +/-stops] input [output|-]\n",
+			progname);
 	exit(1);
 }
 
@@ -165,25 +178,25 @@ register FILE	*fp;
 
 ra2bn()					/* convert radiance to barneyscan */
 {
-	unsigned char	gmap[1024];
-	register int	i,k,c;
-	register COLOR	*inl;
+	register int	i;
+	register COLR	*inl;
 	int	j;
 
-	if ((inl = (COLOR *)malloc(xmax*sizeof(COLOR))) == NULL)
+	if ((inl = (COLR *)malloc(xmax*sizeof(COLR))) == NULL)
 		quiterr("out of memory");
-	for (i = 0; i < 1024; i++)
-		gmap[i] = 256.*pow((i+.5)/1024., 1./gamma);
 	for (j = 0; j < ymax; j++) {
-		if (freadscan(inl, xmax, rafp) < 0)
+		if (freadcolrs(inl, xmax, rafp) < 0)
 			quiterr("error reading RADIANCE file");
-		for (i = 0; i < xmax; i++)
-			for (k = 0; k < 3; k++) {
-				c = 1024.*colval(inl[i],k);
-				if (c >= 1024)
-					c = 1023;
-				putc(gmap[c], bnfp[k]);
-			}
+		if (bradj)
+			shiftcolrs(inl, xmax, bradj);
+		colrs_gambs(inl, xmax);
+		for (i = 0; i < xmax; i++) {
+			putc(inl[i][RED], bnfp[0]);
+			putc(inl[i][GRN], bnfp[1]);
+			putc(inl[i][BLU], bnfp[2]);
+		}
+		if (ferror(bnfp[0]) || ferror(bnfp[1]) || ferror(bnfp[2]))
+			quiterr("error writing Barney files");
 	}
 	free((char *)inl);
 }
@@ -191,23 +204,24 @@ ra2bn()					/* convert radiance to barneyscan */
 
 bn2ra()					/* convert barneyscan to radiance */
 {
-	float	gmap[256];
-	register int	i,k,c;
-	register COLOR	*outline;
+	register int	i;
+	register COLR	*outline;
 	int	j;
 
-	if ((outline = (COLOR *)malloc(xmax*sizeof(COLOR))) == NULL)
+	if ((outline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL)
 		quiterr("out of memory");
-	for (i = 0; i < 256; i++)
-		gmap[i] = pow((i+.5)/256., gamma);
 	for (j = 0; j < ymax; j++) {
-		for (i = 0; i < xmax; i++)
-			for (k = 0; k < 3; k++)
-				if ((c = getc(bnfp[k])) == EOF)
-					quiterr("error reading barney file");
-				else
-					colval(outline[i],k) = gmap[c];
-		if (fwritescan(outline, xmax, rafp) < 0)
+		for (i = 0; i < xmax; i++) {
+			outline[i][RED] = getc(bnfp[0]);
+			outline[i][GRN] = getc(bnfp[1]);
+			outline[i][BLU] = getc(bnfp[2]);
+		}
+		if (feof(bnfp[0]) || feof(bnfp[1]) || feof(bnfp[2]))
+			quiterr("error reading barney file");
+		gambs_colrs(outline, xmax);
+		if (bradj)
+			shiftcolrs(outline, xmax, bradj);
+		if (fwritecolrs(outline, xmax, rafp) < 0)
 			quiterr("error writing RADIANCE file");
 	}
 	free((char *)outline);