--- ray/src/px/ra_pr24.c	1991/01/09 15:33:20	1.4
+++ ray/src/px/ra_pr24.c	1991/08/15 12:38:24	1.8
@@ -1,4 +1,4 @@
-/* Copyright (c) 1990 Regents of the University of California */
+/* Copyright (c) 1991 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -18,6 +18,8 @@ extern double  atof(), pow();
 
 double	gamma = 2.0;			/* gamma correction */
 
+int  bradj = 0;				/* brightness adjustment */
+
 char  *progname;
 
 int  xmax, ymax;
@@ -39,6 +41,11 @@ char  *argv[];
 			case 'g':
 				gamma = atof(argv[++i]);
 				break;
+			case 'e':
+				if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
+					goto userr;
+				bradj = atoi(argv[++i]);
+				break;
 			case 'r':
 				reverse = !reverse;
 				break;
@@ -69,22 +76,23 @@ char  *argv[];
 			quiterr("bad raster format");
 		xmax = head.ras_width;
 		ymax = head.ras_height;
-		if (head.ras_type != RT_STANDARD ||
-				head.ras_maptype != RMT_NONE ||
-				head.ras_depth != 24)
+		if ((head.ras_type != RT_STANDARD
+					&& head.ras_type != RT_FORMAT_RGB)
+				|| head.ras_maptype != RMT_NONE
+				|| head.ras_depth != 24)
 			quiterr("incompatible format");
 					/* put header */
 		printargs(i, argv, stdout);
+		fputformat(COLRFMT, stdout);
 		putchar('\n');
 		fputresolu(YMAJOR|YDECR, xmax, ymax, stdout);
 					/* convert file */
-		pr2ra();
+		pr2ra(head.ras_type);
 	} else {
-					/* discard input header */
-		getheader(stdin, NULL);
-					/* get resolution */
-		if (fgetresolu(&xmax, &ymax, stdin) != (YMAJOR|YDECR))
-			quiterr("bad picture size");
+					/* get header info. */
+		if (checkheader(stdin, COLRFMT, NULL) < 0 ||
+			fgetresolu(&xmax, &ymax, stdin) != (YMAJOR|YDECR))
+			quiterr("bad picture format");
 					/* write rasterfile header */
 		head.ras_magic = RAS_MAGIC;
 		head.ras_width = xmax;
@@ -100,7 +108,7 @@ char  *argv[];
 	}
 	exit(0);
 userr:
-	fprintf(stderr, "Usage: %s [-r][-g gamma] [input [output]]\n",
+	fprintf(stderr, "Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n",
 			progname);
 	exit(1);
 }
@@ -117,7 +125,8 @@ char  *err;
 }
 
 
-pr2ra()			/* convert 24-bit scanlines to Radiance picture */
+pr2ra(rf)		/* convert 24-bit scanlines to Radiance picture */
+int	rf;
 {
 	COLR	*scanout;
 	register int	x;
@@ -128,14 +137,21 @@ pr2ra()			/* convert 24-bit scanlines to Radiance pict
 		quiterr("out of memory in pr2ra");
 						/* convert image */
 	for (y = ymax-1; y >= 0; y--) {
-		for (x = 0; x < xmax; x++) {
-			scanout[x][BLU] = getc(stdin);
-			scanout[x][GRN] = getc(stdin);
-			scanout[x][RED] = getc(stdin);
-		}
+		for (x = 0; x < xmax; x++)
+			if (rf == RT_FORMAT_RGB) {
+				scanout[x][RED] = getc(stdin);
+				scanout[x][GRN] = getc(stdin);
+				scanout[x][BLU] = getc(stdin);
+			} else {
+				scanout[x][BLU] = getc(stdin);
+				scanout[x][GRN] = getc(stdin);
+				scanout[x][RED] = getc(stdin);
+			}
 		if (feof(stdin) || ferror(stdin))
 			quiterr("error reading rasterfile");
 		gambs_colrs(scanout, xmax);
+		if (bradj)
+			shiftcolrs(scanout, xmax, bradj);
 		if (fwritecolrs(scanout, xmax, stdout) < 0)
 			quiterr("error writing Radiance picture");
 	}
@@ -152,11 +168,13 @@ ra2pr()			/* convert Radiance scanlines to 24-bit rast
 						/* allocate scanline */
 	scanin = (COLR *)malloc(xmax*sizeof(COLR));
 	if (scanin == NULL)
-		quiterr("out of memory in pr2ra");
+		quiterr("out of memory in ra2pr");
 						/* convert image */
 	for (y = ymax-1; y >= 0; y--) {
 		if (freadcolrs(scanin, xmax, stdin) < 0)
 			quiterr("error reading Radiance picture");
+		if (bradj)
+			shiftcolrs(scanin, xmax, bradj);
 		colrs_gambs(scanin, xmax);
 		for (x = 0; x < xmax; x++) {
 			putc(scanin[x][BLU], stdout);