Initial import of argyll version 1.5.1-8debian/1.5.1-8

1 files changed, 639 insertions, 0 deletions

diff --git a/tiff/tools/thumbnail.c b/tiff/tools/thumbnail.c
new file mode 100644
index 0000000..e9e51a3
--- /dev/null
+++ b/tiff/tools/thumbnail.c
@@ -0,0 +1,639 @@
+/* $Id: thumbnail.c,v 1.9.2.1 2010-06-08 18:50:44 bfriesen Exp $ */
+
+/*
+ * Copyright (c) 1994-1997 Sam Leffler
+ * Copyright (c) 1994-1997 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and 
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the names of
+ * Sam Leffler and Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Sam Leffler and Silicon Graphics.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
+ * 
+ * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
+ * OF THIS SOFTWARE.
+ */
+
+#include "tif_config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#include "tiffio.h"
+
+#ifndef HAVE_GETOPT
+extern int getopt(int, char**, char*);
+#endif
+
+#define	streq(a,b)	(strcmp(a,b) == 0)
+
+#ifndef TIFFhowmany8
+# define TIFFhowmany8(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3)
+#endif
+
+typedef enum {
+    EXP50,
+    EXP60,
+    EXP70,
+    EXP80,
+    EXP90,
+    EXP,
+    LINEAR
+} Contrast;
+
+static	uint32 tnw = 216;		/* thumbnail width */
+static	uint32 tnh = 274;		/* thumbnail height */
+static	Contrast contrast = LINEAR;	/* current contrast */
+static	uint8* thumbnail;
+
+static	int cpIFD(TIFF*, TIFF*);
+static	int generateThumbnail(TIFF*, TIFF*);
+static	void initScale();
+static	void usage(void);
+
+extern	char* optarg;
+extern	int optind;
+
+int
+main(int argc, char* argv[])
+{
+    TIFF* in;
+    TIFF* out;
+    int c;
+
+    while ((c = getopt(argc, argv, "w:h:c:")) != -1) {
+	switch (c) {
+	case 'w':	tnw = strtoul(optarg, NULL, 0); break;
+	case 'h':	tnh = strtoul(optarg, NULL, 0); break;
+	case 'c':	contrast = streq(optarg, "exp50") ? EXP50 :
+				   streq(optarg, "exp60") ? EXP60 :
+				   streq(optarg, "exp70") ? EXP70 :
+				   streq(optarg, "exp80") ? EXP80 :
+				   streq(optarg, "exp90") ? EXP90 :
+				   streq(optarg, "exp")   ? EXP :
+				   streq(optarg, "linear")? LINEAR :
+							    EXP;
+			break;
+	default:	usage();
+	}
+    }
+    if (argc-optind != 2)
+	usage();
+
+    out = TIFFOpen(argv[optind+1], "w");
+    if (out == NULL)
+	return 2;
+    in = TIFFOpen(argv[optind], "r");
+
+    thumbnail = (uint8*) _TIFFmalloc(tnw * tnh);
+    if (!thumbnail) {
+	    TIFFError(TIFFFileName(in),
+		      "Can't allocate space for thumbnail buffer.");
+	    return 1;
+    }
+
+    if (in != NULL) {
+	initScale();
+	do {
+	    if (!generateThumbnail(in, out))
+		goto bad;
+	    if (!cpIFD(in, out) || !TIFFWriteDirectory(out))
+		goto bad;
+	} while (TIFFReadDirectory(in));
+	(void) TIFFClose(in);
+    }
+    (void) TIFFClose(out);
+    return 0;
+bad:
+    (void) TIFFClose(out);
+    return 1;
+}
+
+#define	CopyField(tag, v) \
+    if (TIFFGetField(in, tag, &v)) TIFFSetField(out, tag, v)
+#define	CopyField2(tag, v1, v2) \
+    if (TIFFGetField(in, tag, &v1, &v2)) TIFFSetField(out, tag, v1, v2)
+#define	CopyField3(tag, v1, v2, v3) \
+    if (TIFFGetField(in, tag, &v1, &v2, &v3)) TIFFSetField(out, tag, v1, v2, v3)
+#define	CopyField4(tag, v1, v2, v3, v4) \
+    if (TIFFGetField(in, tag, &v1, &v2, &v3, &v4)) TIFFSetField(out, tag, v1, v2, v3, v4)
+
+static void
+cpTag(TIFF* in, TIFF* out, uint16 tag, uint16 count, TIFFDataType type)
+{
+	switch (type) {
+	case TIFF_SHORT:
+		if (count == 1) {
+			uint16 shortv;
+			CopyField(tag, shortv);
+		} else if (count == 2) {
+			uint16 shortv1, shortv2;
+			CopyField2(tag, shortv1, shortv2);
+		} else if (count == 4) {
+			uint16 *tr, *tg, *tb, *ta;
+			CopyField4(tag, tr, tg, tb, ta);
+		} else if (count == (uint16) -1) {
+			uint16 shortv1;
+			uint16* shortav;
+			CopyField2(tag, shortv1, shortav);
+		}
+		break;
+	case TIFF_LONG:
+		{ uint32 longv;
+		  CopyField(tag, longv);
+		}
+		break;
+	case TIFF_RATIONAL:
+		if (count == 1) {
+			float floatv;
+			CopyField(tag, floatv);
+		} else if (count == (uint16) -1) {
+			float* floatav;
+			CopyField(tag, floatav);
+		}
+		break;
+	case TIFF_ASCII:
+		{ char* stringv;
+		  CopyField(tag, stringv);
+		}
+		break;
+	case TIFF_DOUBLE:
+		if (count == 1) {
+			double doublev;
+			CopyField(tag, doublev);
+		} else if (count == (uint16) -1) {
+			double* doubleav;
+			CopyField(tag, doubleav);
+		}
+		break;
+          default:
+                TIFFError(TIFFFileName(in),
+                          "Data type %d is not supported, tag %d skipped.",
+                          tag, type);
+	}
+}
+
+#undef CopyField4
+#undef CopyField3
+#undef CopyField2
+#undef CopyField
+
+static struct cpTag {
+    uint16	tag;
+    uint16	count;
+    TIFFDataType type;
+} tags[] = {
+    { TIFFTAG_IMAGEWIDTH,		1, TIFF_LONG },
+    { TIFFTAG_IMAGELENGTH,		1, TIFF_LONG },
+    { TIFFTAG_BITSPERSAMPLE,		1, TIFF_SHORT },
+    { TIFFTAG_COMPRESSION,		1, TIFF_SHORT },
+    { TIFFTAG_FILLORDER,		1, TIFF_SHORT },
+    { TIFFTAG_SAMPLESPERPIXEL,		1, TIFF_SHORT },
+    { TIFFTAG_ROWSPERSTRIP,		1, TIFF_LONG },
+    { TIFFTAG_PLANARCONFIG,		1, TIFF_SHORT },
+    { TIFFTAG_GROUP3OPTIONS,		1, TIFF_LONG },
+    { TIFFTAG_SUBFILETYPE,		1, TIFF_LONG },
+    { TIFFTAG_PHOTOMETRIC,		1, TIFF_SHORT },
+    { TIFFTAG_THRESHHOLDING,		1, TIFF_SHORT },
+    { TIFFTAG_DOCUMENTNAME,		1, TIFF_ASCII },
+    { TIFFTAG_IMAGEDESCRIPTION,		1, TIFF_ASCII },
+    { TIFFTAG_MAKE,			1, TIFF_ASCII },
+    { TIFFTAG_MODEL,			1, TIFF_ASCII },
+    { TIFFTAG_ORIENTATION,		1, TIFF_SHORT },
+    { TIFFTAG_MINSAMPLEVALUE,		1, TIFF_SHORT },
+    { TIFFTAG_MAXSAMPLEVALUE,		1, TIFF_SHORT },
+    { TIFFTAG_XRESOLUTION,		1, TIFF_RATIONAL },
+    { TIFFTAG_YRESOLUTION,		1, TIFF_RATIONAL },
+    { TIFFTAG_PAGENAME,			1, TIFF_ASCII },
+    { TIFFTAG_XPOSITION,		1, TIFF_RATIONAL },
+    { TIFFTAG_YPOSITION,		1, TIFF_RATIONAL },
+    { TIFFTAG_GROUP4OPTIONS,		1, TIFF_LONG },
+    { TIFFTAG_RESOLUTIONUNIT,		1, TIFF_SHORT },
+    { TIFFTAG_PAGENUMBER,		2, TIFF_SHORT },
+    { TIFFTAG_SOFTWARE,			1, TIFF_ASCII },
+    { TIFFTAG_DATETIME,			1, TIFF_ASCII },
+    { TIFFTAG_ARTIST,			1, TIFF_ASCII },
+    { TIFFTAG_HOSTCOMPUTER,		1, TIFF_ASCII },
+    { TIFFTAG_WHITEPOINT,		1, TIFF_RATIONAL },
+    { TIFFTAG_PRIMARYCHROMATICITIES,	(uint16) -1,TIFF_RATIONAL },
+    { TIFFTAG_HALFTONEHINTS,		2, TIFF_SHORT },
+    { TIFFTAG_BADFAXLINES,		1, TIFF_LONG },
+    { TIFFTAG_CLEANFAXDATA,		1, TIFF_SHORT },
+    { TIFFTAG_CONSECUTIVEBADFAXLINES,	1, TIFF_LONG },
+    { TIFFTAG_INKSET,			1, TIFF_SHORT },
+    { TIFFTAG_INKNAMES,			1, TIFF_ASCII },
+    { TIFFTAG_DOTRANGE,			2, TIFF_SHORT },
+    { TIFFTAG_TARGETPRINTER,		1, TIFF_ASCII },
+    { TIFFTAG_SAMPLEFORMAT,		1, TIFF_SHORT },
+    { TIFFTAG_YCBCRCOEFFICIENTS,	(uint16) -1,TIFF_RATIONAL },
+    { TIFFTAG_YCBCRSUBSAMPLING,		2, TIFF_SHORT },
+    { TIFFTAG_YCBCRPOSITIONING,		1, TIFF_SHORT },
+    { TIFFTAG_REFERENCEBLACKWHITE,	(uint16) -1,TIFF_RATIONAL },
+    { TIFFTAG_EXTRASAMPLES,		(uint16) -1, TIFF_SHORT },
+};
+#define	NTAGS	(sizeof (tags) / sizeof (tags[0]))
+
+static void
+cpTags(TIFF* in, TIFF* out)
+{
+    struct cpTag *p;
+    for (p = tags; p < &tags[NTAGS]; p++)
+	cpTag(in, out, p->tag, p->count, p->type);
+}
+#undef NTAGS
+
+static int
+cpStrips(TIFF* in, TIFF* out)
+{
+    tsize_t bufsize  = TIFFStripSize(in);
+    unsigned char *buf = (unsigned char *)_TIFFmalloc(bufsize);
+
+    if (buf) {
+	tstrip_t s, ns = TIFFNumberOfStrips(in);
+	tsize_t *bytecounts;
+
+	TIFFGetField(in, TIFFTAG_STRIPBYTECOUNTS, &bytecounts);
+	for (s = 0; s < ns; s++) {
+	    if (bytecounts[s] > bufsize) {
+		buf = (unsigned char *)_TIFFrealloc(buf, bytecounts[s]);
+		if (!buf)
+		    goto bad;
+		bufsize = bytecounts[s];
+	    }
+	    if (TIFFReadRawStrip(in, s, buf, bytecounts[s]) < 0 ||
+		TIFFWriteRawStrip(out, s, buf, bytecounts[s]) < 0) {
+		_TIFFfree(buf);
+		return 0;
+	    }
+	}
+	_TIFFfree(buf);
+	return 1;
+    }
+
+bad:
+	TIFFError(TIFFFileName(in),
+		  "Can't allocate space for strip buffer.");
+	return 0;
+}
+
+static int
+cpTiles(TIFF* in, TIFF* out)
+{
+    tsize_t bufsize = TIFFTileSize(in);
+    unsigned char *buf = (unsigned char *)_TIFFmalloc(bufsize);
+
+    if (buf) {
+	ttile_t t, nt = TIFFNumberOfTiles(in);
+	tsize_t *bytecounts;
+
+	TIFFGetField(in, TIFFTAG_TILEBYTECOUNTS, &bytecounts);
+	for (t = 0; t < nt; t++) {
+	    if (bytecounts[t] > bufsize) {
+		buf = (unsigned char *)_TIFFrealloc(buf, bytecounts[t]);
+		if (!buf)
+		    goto bad;
+		bufsize = bytecounts[t];
+	    }
+	    if (TIFFReadRawTile(in, t, buf, bytecounts[t]) < 0 ||
+		TIFFWriteRawTile(out, t, buf, bytecounts[t]) < 0) {
+		_TIFFfree(buf);
+		return 0;
+	    }
+	}
+	_TIFFfree(buf);
+	return 1;
+    }
+
+bad:
+    TIFFError(TIFFFileName(in),
+		  "Can't allocate space for tile buffer.");
+	return (0);
+}
+
+static int
+cpIFD(TIFF* in, TIFF* out)
+{
+    cpTags(in, out);
+    if (TIFFIsTiled(in)) {
+	if (!cpTiles(in, out))
+	    return (0);
+    } else {
+	if (!cpStrips(in, out))
+	    return (0);
+    }
+    return (1);
+}
+
+static	uint16	photometric;		/* current photometric of raster */
+static	uint16	filterWidth;		/* filter width in pixels */
+static	uint32	stepSrcWidth;		/* src image stepping width */
+static	uint32	stepDstWidth;		/* dest stepping width */
+static	uint8* src0;			/* horizontal bit stepping (start) */
+static	uint8* src1;			/* horizontal bit stepping (middle) */
+static	uint8* src2;			/* horizontal bit stepping (end) */
+static	uint32* rowoff;			/* row offset for stepping */
+static	uint8 cmap[256];		/* colormap indexes */
+static	uint8 bits[256];		/* count of bits set */
+
+static void
+setupBitsTables()
+{
+    int i;
+    for (i = 0; i < 256; i++) {
+	int n = 0;
+	if (i&0x01) n++;
+	if (i&0x02) n++;
+	if (i&0x04) n++;
+	if (i&0x08) n++;
+	if (i&0x10) n++;
+	if (i&0x20) n++;
+	if (i&0x40) n++;
+	if (i&0x80) n++;
+	bits[i] = n;
+    }
+}
+
+static int clamp(float v, int low, int high)
+    { return (v < low ? low : v > high ? high : (int)v); }
+
+#ifndef M_E
+#define M_E		2.7182818284590452354
+#endif
+
+static void
+expFill(float pct[], uint32 p, uint32 n)
+{
+    uint32 i;
+    uint32 c = (p * n) / 100;
+    for (i = 1; i < c; i++)
+	pct[i] = (float) (1-exp(i/((double)(n-1)))/ M_E);
+    for (; i < n; i++)
+	pct[i] = 0.;
+}
+
+static void
+setupCmap()
+{
+    float pct[256];			/* known to be large enough */
+    uint32 i;
+    pct[0] = 1;				/* force white */
+    switch (contrast) {
+    case EXP50: expFill(pct, 50, 256); break;
+    case EXP60:	expFill(pct, 60, 256); break;
+    case EXP70:	expFill(pct, 70, 256); break;
+    case EXP80:	expFill(pct, 80, 256); break;
+    case EXP90:	expFill(pct, 90, 256); break;
+    case EXP:	expFill(pct, 100, 256); break;
+    case LINEAR:
+	for (i = 1; i < 256; i++)
+	    pct[i] = 1-((float)i)/(256-1);
+	break;
+    }
+    switch (photometric) {
+    case PHOTOMETRIC_MINISWHITE:
+	for (i = 0; i < 256; i++)
+	    cmap[i] = clamp(255*pct[(256-1)-i], 0, 255);
+	break;
+    case PHOTOMETRIC_MINISBLACK:
+	for (i = 0; i < 256; i++)
+	    cmap[i] = clamp(255*pct[i], 0, 255);
+	break;
+    }
+}
+
+static void
+initScale()
+{
+    src0 = (uint8*) _TIFFmalloc(sizeof (uint8) * tnw);
+    src1 = (uint8*) _TIFFmalloc(sizeof (uint8) * tnw);
+    src2 = (uint8*) _TIFFmalloc(sizeof (uint8) * tnw);
+    rowoff = (uint32*) _TIFFmalloc(sizeof (uint32) * tnw);
+    filterWidth = 0;
+    stepDstWidth = stepSrcWidth = 0;
+    setupBitsTables();
+}
+
+/*
+ * Calculate the horizontal accumulation parameteres
+ * according to the widths of the src and dst images.
+ */
+static void
+setupStepTables(uint32 sw)
+{
+    if (stepSrcWidth != sw || stepDstWidth != tnw) {
+	int step = sw;
+	int limit = tnw;
+	int err = 0;
+	uint32 sx = 0;
+	uint32 x;
+	int fw;
+	uint8 b;
+	for (x = 0; x < tnw; x++) {
+	    uint32 sx0 = sx;
+	    err += step;
+	    while (err >= limit) {
+		err -= limit;
+		sx++;
+	    }
+	    rowoff[x] = sx0 >> 3;
+	    fw = sx - sx0;		/* width */
+	    b = (fw < 8) ? 0xff<<(8-fw) : 0xff;
+	    src0[x] = b >> (sx0&7);
+	    fw -= 8 - (sx0&7);
+	    if (fw < 0)
+		fw = 0;
+	    src1[x] = fw >> 3;
+	    fw -= (fw>>3)<<3;
+	    src2[x] = 0xff << (8-fw);
+	}
+	stepSrcWidth = sw;
+	stepDstWidth = tnw;
+    }
+}
+
+static void
+setrow(uint8* row, uint32 nrows, const uint8* rows[])
+{
+    uint32 x;
+    uint32 area = nrows * filterWidth;
+    for (x = 0; x < tnw; x++) {
+	uint32 mask0 = src0[x];
+	uint32 fw = src1[x];
+	uint32 mask1 = src1[x];
+	uint32 off = rowoff[x];
+	uint32 acc = 0;
+	uint32 y, i;
+	for (y = 0; y < nrows; y++) {
+	    const uint8* src = rows[y] + off;
+	    acc += bits[*src++ & mask0];
+	    switch (fw) {
+	    default:
+		for (i = fw; i > 8; i--)
+		    acc += bits[*src++];
+		/* fall thru... */
+	    case 8: acc += bits[*src++];
+	    case 7: acc += bits[*src++];
+	    case 6: acc += bits[*src++];
+	    case 5: acc += bits[*src++];
+	    case 4: acc += bits[*src++];
+	    case 3: acc += bits[*src++];
+	    case 2: acc += bits[*src++];
+	    case 1: acc += bits[*src++];
+	    case 0: break;
+	    }
+	    acc += bits[*src & mask1];
+	}
+	*row++ = cmap[(255*acc)/area];
+    }
+}
+
+/*
+ * Install the specified image.  The
+ * image is resized to fit the display page using
+ * a box filter.  The resultant pixels are mapped
+ * with a user-selectable contrast curve.
+ */
+static void
+setImage1(const uint8* br, uint32 rw, uint32 rh)
+{
+    int step = rh;
+    int limit = tnh;
+    int err = 0;
+    int bpr = TIFFhowmany8(rw);
+    int sy = 0;
+    uint8* row = thumbnail;
+    uint32 dy;
+    for (dy = 0; dy < tnh; dy++) {
+	const uint8* rows[256];
+	uint32 nrows = 1;
+	fprintf(stderr, "bpr=%d, sy=%d, bpr*sy=%d\n", bpr, sy, bpr*sy);
+	rows[0] = br + bpr*sy;
+	err += step;
+	while (err >= limit) {
+	    err -= limit;
+	    sy++;
+	    if (err >= limit)
+		rows[nrows++] = br + bpr*sy;
+	}
+	setrow(row, nrows, rows);
+	row += tnw;
+    }
+}
+
+static void
+setImage(const uint8* br, uint32 rw, uint32 rh)
+{
+    filterWidth = (uint16) ceil((double) rw / (double) tnw);
+    setupStepTables(rw);
+    setImage1(br, rw, rh);
+}
+
+static int
+generateThumbnail(TIFF* in, TIFF* out)
+{
+    unsigned char* raster;
+    unsigned char* rp;
+    uint32 sw, sh, rps;
+    uint16 bps, spp;
+    tsize_t rowsize, rastersize;
+    tstrip_t s, ns = TIFFNumberOfStrips(in);
+    uint32 diroff[1];
+
+    TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &sw);
+    TIFFGetField(in, TIFFTAG_IMAGELENGTH, &sh);
+    TIFFGetFieldDefaulted(in, TIFFTAG_BITSPERSAMPLE, &bps);
+    TIFFGetFieldDefaulted(in, TIFFTAG_SAMPLESPERPIXEL, &spp);
+    TIFFGetFieldDefaulted(in, TIFFTAG_ROWSPERSTRIP, &rps);
+    if (spp != 1 || bps != 1)
+	return 0;
+    rowsize = TIFFScanlineSize(in);
+    rastersize = sh * rowsize;
+    fprintf(stderr, "rastersize=%u\n", (unsigned int)rastersize);
+    raster = (unsigned char*)_TIFFmalloc(rastersize);
+    if (!raster) {
+	    TIFFError(TIFFFileName(in),
+		      "Can't allocate space for raster buffer.");
+	    return 0;
+    }
+    rp = raster;
+    for (s = 0; s < ns; s++) {
+	(void) TIFFReadEncodedStrip(in, s, rp, -1);
+	rp += rps * rowsize;
+    }
+    TIFFGetField(in, TIFFTAG_PHOTOMETRIC, &photometric);
+    setupCmap();
+    setImage(raster, sw, sh);
+    _TIFFfree(raster);
+
+    TIFFSetField(out, TIFFTAG_SUBFILETYPE, FILETYPE_REDUCEDIMAGE);
+    TIFFSetField(out, TIFFTAG_IMAGEWIDTH, (uint32) tnw);
+    TIFFSetField(out, TIFFTAG_IMAGELENGTH, (uint32) tnh);
+    TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, (uint16) 8);
+    TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, (uint16) 1);
+    TIFFSetField(out, TIFFTAG_COMPRESSION, COMPRESSION_PACKBITS);
+    TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISWHITE);
+    TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
+    TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
+    cpTag(in, out, TIFFTAG_SOFTWARE,		(uint16) -1, TIFF_ASCII);
+    cpTag(in, out, TIFFTAG_IMAGEDESCRIPTION,	(uint16) -1, TIFF_ASCII);
+    cpTag(in, out, TIFFTAG_DATETIME,		(uint16) -1, TIFF_ASCII);
+    cpTag(in, out, TIFFTAG_HOSTCOMPUTER,	(uint16) -1, TIFF_ASCII);
+    diroff[0] = 0;
+    TIFFSetField(out, TIFFTAG_SUBIFD, 1, diroff);
+    return (TIFFWriteEncodedStrip(out, 0, thumbnail, tnw*tnh) != -1 &&
+            TIFFWriteDirectory(out) != -1);
+}
+
+char* stuff[] = {
+"usage: thumbnail [options] input.tif output.tif",
+"where options are:",
+" -h #		specify thumbnail image height (default is 274)",
+" -w #		specify thumbnail image width (default is 216)",
+"",
+" -c linear	use linear contrast curve",
+" -c exp50	use 50% exponential contrast curve",
+" -c exp60	use 60% exponential contrast curve",
+" -c exp70	use 70% exponential contrast curve",
+" -c exp80	use 80% exponential contrast curve",
+" -c exp90	use 90% exponential contrast curve",
+" -c exp		use pure exponential contrast curve",
+NULL
+};
+
+static void
+usage(void)
+{
+	char buf[BUFSIZ];
+	int i;
+
+	setbuf(stderr, buf);
+        fprintf(stderr, "%s\n\n", TIFFGetVersion());
+	for (i = 0; stuff[i] != NULL; i++)
+		fprintf(stderr, "%s\n", stuff[i]);
+	exit(-1);
+}
+
+/* vim: set ts=8 sts=8 sw=8 noet: */
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */