--- ray/src/px/ra_pr24.c	1991/04/29 11:14:10	1.6
+++ ray/src/px/ra_pr24.c	1991/10/14 17:06:49	1.9
@@ -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;
@@ -33,14 +35,23 @@ char  *argv[];
 	
 	progname = argv[0];
 
+	head.ras_type = RT_STANDARD;
 	for (i = 1; i < argc; i++)
 		if (argv[i][0] == '-')
 			switch (argv[i][1]) {
 			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;
+				if (!strcmp(argv[i], "-rgb"))
+					head.ras_type = RT_FORMAT_RGB;
+				else
+					reverse = 1;
 				break;
 			default:
 				goto userr;
@@ -92,16 +103,15 @@ char  *argv[];
 		head.ras_height = ymax;
 		head.ras_depth = 24;
 		head.ras_length = xmax*ymax*3;
-		head.ras_type = RT_STANDARD;
 		head.ras_maptype = RMT_NONE;
 		head.ras_maplength = 0;
 		fwrite((char *)&head, sizeof(head), 1, stdout);
 					/* convert file */
-		ra2pr();
+		ra2pr(head.ras_type);
 	}
 	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);
 }
@@ -130,12 +140,14 @@ int	rf;
 		quiterr("out of memory in pr2ra");
 						/* convert image */
 	for (y = ymax-1; y >= 0; y--) {
-		for (x = 0; x < xmax; x++)
-			if (rf == RT_FORMAT_RGB) {
+		if (rf == RT_FORMAT_RGB)
+			for (x = 0; x < xmax; x++) {
 				scanout[x][RED] = getc(stdin);
 				scanout[x][GRN] = getc(stdin);
 				scanout[x][BLU] = getc(stdin);
-			} else {
+			}
+		else
+			for (x = 0; x < xmax; x++) {
 				scanout[x][BLU] = getc(stdin);
 				scanout[x][GRN] = getc(stdin);
 				scanout[x][RED] = getc(stdin);
@@ -143,6 +155,8 @@ int	rf;
 		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");
 	}
@@ -151,7 +165,8 @@ int	rf;
 }
 
 
-ra2pr()			/* convert Radiance scanlines to 24-bit rasterfile */
+ra2pr(rf)		/* convert Radiance scanlines to 24-bit rasterfile */
+int  rf;
 {
 	COLR	*scanin;
 	register int	x;
@@ -159,17 +174,26 @@ 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);
-			putc(scanin[x][GRN], stdout);
-			putc(scanin[x][RED], stdout);
-		}
+		if (rf == RT_FORMAT_RGB)
+			for (x = 0; x < xmax; x++) {
+				putc(scanin[x][RED], stdout);
+				putc(scanin[x][GRN], stdout);
+				putc(scanin[x][BLU], stdout);
+			}
+		else
+			for (x = 0; x < xmax; x++) {
+				putc(scanin[x][BLU], stdout);
+				putc(scanin[x][GRN], stdout);
+				putc(scanin[x][RED], stdout);
+			}
 		if (ferror(stdout))
 			quiterr("error writing rasterfile");
 	}