--- ray/src/util/rcode_depth.c	2019/11/13 18:17:05	2.7
+++ ray/src/util/rcode_depth.c	2020/02/12 01:13:01	2.10
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rcode_depth.c,v 2.7 2019/11/13 18:17:05 greg Exp $";
+static const char RCSid[] = "$Id: rcode_depth.c,v 2.10 2020/02/12 01:13:01 greg Exp $";
 #endif
 /*
  * Encode and decode depth map using 16-bit integers
@@ -27,7 +27,7 @@ usage_exit(int code)
 	fputs("Usage: ", stderr);
 	fputs(progname, stderr);
 	fputs(
-	" [-d ref_depth/unit][-h[io]][-H[io]][-f[afd]] [input [output.dpt]]\n",
+	" [-d ref_depth/unit][-h[io]][-H[io]][-f[afd]][-x xr -y yr] [input [output.dpt]]\n",
 			stderr);
 	fputs("   Or: ", stderr);
 	fputs(progname, stderr);
@@ -45,11 +45,11 @@ encode_depths(DEPTHCODEC *dcp)
 	long	nexpected = (long)dcp->res.xr * dcp->res.yr;
 
 	if (dcp->inpfmt[0]) {
-		if (strstr(dcp->inpfmt, "ascii") != NULL)
+		if (!strcmp(dcp->inpfmt, "ascii"))
 			dcp->format = 'a';
-		else if (strstr(dcp->inpfmt, "float") != NULL)
+		else if (!strcmp(dcp->inpfmt, "float"))
 			dcp->format = 'f';
-		else if (strstr(dcp->inpfmt, "double") != NULL)
+		else if (!strcmp(dcp->inpfmt, "double"))
 			dcp->format = 'd';
 		else {
 			fputs(dcp->inpname, stderr);
@@ -429,6 +429,11 @@ main(int argc, char *argv[])
 					/* process data */
 	switch (conversion) {
 	case CV_FWD:			/* distance -> depth code */
+		if (!strcmp(dc.depth_unit, "1")) {
+			fputs(progname, stderr);
+			fputs(": warning - using reference depth of 1.0\n",
+					stderr);
+		}
 		if (!encode_depths(&dc))
 			return 1;
 		break;