--- ray/src/util/rcrop.c	2022/03/15 00:25:50	1.1
+++ ray/src/util/rcrop.c	2022/03/15 04:41:45	1.5
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rcrop.c,v 1.1 2022/03/15 00:25:50 greg Exp $";
+static const char RCSid[] = "$Id: rcrop.c,v 1.5 2022/03/15 04:41:45 greg Exp $";
 #endif
 /*
  * rcrop.c - crop a Radiance picture or matrix data
@@ -79,11 +79,11 @@ colr_copyf(FILE *fp)
 		return(1);
 writerr:
 	fputs(progname, stderr);
-	fputs(": error writing scanline\n", stderr);
+	fputs(": error writing picture\n", stderr);
 	return(0);
 readerr:
 	fputs(progname, stderr);
-	fputs(": error reading scanline\n", stderr);
+	fputs(": error reading picture\n", stderr);
 	return(0);
 }
 
@@ -91,22 +91,41 @@ readerr:
 static int
 binary_copyf(FILE *fp, int asize)
 {
+	const int	skip_thresh = 8192;
 	const size_t	elsiz = asize*ncomp;
 	const int	width = scanlen(&res);
-	char		*buf = (char *)malloc(elsiz*width);
+	const long	skip_len = (width-ncols)*elsiz;
+	char		*buf;
 	int		y;
-
-	if (!buf) {
-		fputs(progname, stderr);
-		fputs(": out of memory!\n", stderr);
-		return(0);
-	}
+					/* check if fseek() useful */
+	if (skip_len > skip_thresh &&
+			fseek(fp, (rmin*width + cmin)*elsiz, SEEK_CUR) == 0) {
+		buf = (char *)malloc(ncols*elsiz);
+		if (!buf)
+			goto memerr;
+		for (y = nrows; y-- > 0; ) {
+			if (getbinary(buf, elsiz, ncols, fp) != ncols)
+				goto readerr;
+			if (putbinary(buf, elsiz, ncols, stdout) != ncols)
+				goto writerr;
+			if (y && fseek(fp, skip_len, SEEK_CUR) < 0) {
+				fputs(progname, stderr);
+				fputs(": unexpected seek error on input\n", stderr);
+				return(0);
+			}
+		}
+		free(buf);		/* success! */
+		return(1);
+	}				/* else need to read it all... */
+	buf = (char *)malloc(width*elsiz);
+	if (!buf)
+		goto memerr;
 					/* skip rows as requested */
-	if (rmin && fseek(fp, rmin*width*elsiz, SEEK_CUR) < 0) {
+	if (skip_len > skip_thresh ||
+			(rmin && fseek(fp, rmin*width*elsiz, SEEK_CUR) < 0))
 		for (y = 0; y < rmin; y++)
 			if (getbinary(buf, elsiz, width, fp) != width)
 				goto readerr;
-	}
 	for (y = 0; y < nrows; y++) {	/* copy portion */
 		if (getbinary(buf, elsiz, width, fp) != width)
 			goto readerr;
@@ -124,6 +143,10 @@ readerr:
 	fputs(progname, stderr);
 	fputs(": error reading binary data\n", stderr);
 	return(0);
+memerr:
+	fputs(progname, stderr);
+	fputs(": out of memory!\n", stderr);
+	return(0);
 }
 
 /* Read (and copy) specified number of white-space-separated words */
@@ -235,7 +258,7 @@ main(int argc, char *argv[])
 		return(1);
 	}
 	printargs(argc, argv, stdout);
-	if (gotvw) {
+	if (gotvw) {		/* adjust view? */
 		double		p0[2], p1[2];
 		const char	*err;
 		if (res.rt & YMAJOR) {
@@ -264,10 +287,11 @@ main(int argc, char *argv[])
 			fputs(err, stderr);
 			fputc('\n', stderr);
 			return(1);
+		} else {
+			fputs(VIEWSTR, stdout);
+			fprintview(&vw, stdout);
+			fputc('\n', stdout);
 		}
-		fputs(VIEWSTR, stdout);
-		fprintview(&vw, stdout);
-		fputc('\n', stdout);
 	}
 	if (gotdims)
 		printf("NROWS=%d\nNCOLS=%d\n", nrows, ncols);
@@ -292,9 +316,16 @@ main(int argc, char *argv[])
 		asiz = sizeof(float);
 	} else if (!strcmp(fmt, "double")) {
 		asiz = sizeof(double);
+	} else if (!strcmp(fmt, "32-bit_encoded_normal")) {
+		asiz = 4;
+		ncomp = 1;
+	} else if (!strcmp(fmt, "16-bit_encoded_depth")) {
+		asiz = 2;
+		ncomp = 1;
 	} else if (globmatch(PICFMT, fmt)) {
 		asiz = -1;
 		if (!ncomp) ncomp = 3;
+		else ncomp *= (ncomp == 3);
 	} else if (strcasecmp(fmt, "ascii")) {
 		fputs(progname, stderr);
 		fputs(": unsupported format - ", stderr);