xref: /libtiff-4.0.7/tools/raw2tiff.c (revision bfbc7176)
1 /* $Id: raw2tiff.c,v 1.25 2010-03-10 18:56:49 bfriesen Exp $
2  *
3  * Project:  libtiff tools
4  * Purpose:  Convert raw byte sequences in TIFF images
5  * Author:   Andrey Kiselev, [email protected]
6  *
7  ******************************************************************************
8  * Copyright (c) 2002, Andrey Kiselev <[email protected]>
9  *
10  * Permission to use, copy, modify, distribute, and sell this software and
11  * its documentation for any purpose is hereby granted without fee, provided
12  * that (i) the above copyright notices and this permission notice appear in
13  * all copies of the software and related documentation, and (ii) the names of
14  * Sam Leffler and Silicon Graphics may not be used in any advertising or
15  * publicity relating to the software without the specific, prior written
16  * permission of Sam Leffler and Silicon Graphics.
17  *
18  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
19  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
20  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
21  *
22  * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
23  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
24  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
25  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
26  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
27  * OF THIS SOFTWARE.
28  */
29 
30 #include "tif_config.h"
31 
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <sys/stat.h>
36 #include <sys/types.h>
37 #include <math.h>
38 #include <ctype.h>
39 
40 #ifdef HAVE_UNISTD_H
41 # include <unistd.h>
42 #endif
43 
44 #if HAVE_FCNTL_H
45 # include <fcntl.h>
46 #endif
47 
48 #if HAVE_SYS_TYPES_H
49 # include <sys/types.h>
50 #endif
51 
52 #if HAVE_IO_H
53 # include <io.h>
54 #endif
55 
56 #ifdef NEED_LIBPORT
57 # include "libport.h"
58 #endif
59 
60 #include "tiffio.h"
61 
62 #ifndef HAVE_GETOPT
63 extern int getopt(int, char**, char*);
64 #endif
65 
66 #ifndef O_BINARY
67 # define O_BINARY 0
68 #endif
69 
70 typedef enum {
71 	PIXEL,
72 	BAND
73 } InterleavingType;
74 
75 static	uint16 compression = (uint16) -1;
76 static	int jpegcolormode = JPEGCOLORMODE_RGB;
77 static	int quality = 75;		/* JPEG quality */
78 static	uint16 predictor = 0;
79 
80 static void swapBytesInScanline(void *, uint32, TIFFDataType);
81 static int guessSize(int, TIFFDataType, off_t, uint32, int,
82 		     uint32 *, uint32 *);
83 static double correlation(void *, void *, uint32, TIFFDataType);
84 static void usage(void);
85 static	int processCompressOptions(char*);
86 
87 int
88 main(int argc, char* argv[])
89 {
90 	uint32	width = 0, length = 0, linebytes, bufsize;
91 	uint32	nbands = 1;		    /* number of bands in input image*/
92 	off_t	hdr_size = 0;		    /* size of the header to skip */
93 	TIFFDataType dtype = TIFF_BYTE;
94 	int16	depth = 1;		    /* bytes per pixel in input image */
95 	int	swab = 0;		    /* byte swapping flag */
96 	InterleavingType interleaving = 0;  /* interleaving type flag */
97 	uint32  rowsperstrip = (uint32) -1;
98 	uint16	photometric = PHOTOMETRIC_MINISBLACK;
99 	uint16	config = PLANARCONFIG_CONTIG;
100 	uint16	fillorder = FILLORDER_LSB2MSB;
101 	int	fd;
102 	char	*outfilename = NULL;
103 	TIFF	*out;
104 
105 	uint32 row, col, band;
106 	int	c;
107 	unsigned char *buf = NULL, *buf1 = NULL;
108 	extern int optind;
109 	extern char* optarg;
110 
111 	while ((c = getopt(argc, argv, "c:r:H:w:l:b:d:LMp:si:o:h")) != -1) {
112 		switch (c) {
113 		case 'c':		/* compression scheme */
114 			if (!processCompressOptions(optarg))
115 				usage();
116 			break;
117 		case 'r':		/* rows/strip */
118 			rowsperstrip = atoi(optarg);
119 			break;
120 		case 'H':		/* size of input image file header */
121 			hdr_size = atoi(optarg);
122 			break;
123 		case 'w':		/* input image width */
124 			width = atoi(optarg);
125 			break;
126 		case 'l':		/* input image length */
127 			length = atoi(optarg);
128 			break;
129 		case 'b':		/* number of bands in input image */
130 			nbands = atoi(optarg);
131 			break;
132 		case 'd':		/* type of samples in input image */
133 			if (strncmp(optarg, "byte", 4) == 0)
134 				dtype = TIFF_BYTE;
135 			else if (strncmp(optarg, "short", 5) == 0)
136 				dtype = TIFF_SHORT;
137 			else if  (strncmp(optarg, "long", 4) == 0)
138 				dtype = TIFF_LONG;
139 			else if  (strncmp(optarg, "sbyte", 5) == 0)
140 				dtype = TIFF_SBYTE;
141 			else if  (strncmp(optarg, "sshort", 6) == 0)
142 				dtype = TIFF_SSHORT;
143 			else if  (strncmp(optarg, "slong", 5) == 0)
144 				dtype = TIFF_SLONG;
145 			else if  (strncmp(optarg, "float", 5) == 0)
146 				dtype = TIFF_FLOAT;
147 			else if  (strncmp(optarg, "double", 6) == 0)
148 				dtype = TIFF_DOUBLE;
149 			else
150 				dtype = TIFF_BYTE;
151 			depth = TIFFDataWidth(dtype);
152 			break;
153 		case 'L':		/* input has lsb-to-msb fillorder */
154 			fillorder = FILLORDER_LSB2MSB;
155 			break;
156 		case 'M':		/* input has msb-to-lsb fillorder */
157 			fillorder = FILLORDER_MSB2LSB;
158 			break;
159 		case 'p':		/* photometric interpretation */
160 			if (strncmp(optarg, "miniswhite", 10) == 0)
161 				photometric = PHOTOMETRIC_MINISWHITE;
162 			else if (strncmp(optarg, "minisblack", 10) == 0)
163 				photometric = PHOTOMETRIC_MINISBLACK;
164 			else if (strncmp(optarg, "rgb", 3) == 0)
165 				photometric = PHOTOMETRIC_RGB;
166 			else if (strncmp(optarg, "cmyk", 4) == 0)
167 				photometric = PHOTOMETRIC_SEPARATED;
168 			else if (strncmp(optarg, "ycbcr", 5) == 0)
169 				photometric = PHOTOMETRIC_YCBCR;
170 			else if (strncmp(optarg, "cielab", 6) == 0)
171 				photometric = PHOTOMETRIC_CIELAB;
172 			else if (strncmp(optarg, "icclab", 6) == 0)
173 				photometric = PHOTOMETRIC_ICCLAB;
174 			else if (strncmp(optarg, "itulab", 6) == 0)
175 				photometric = PHOTOMETRIC_ITULAB;
176 			else
177 				photometric = PHOTOMETRIC_MINISBLACK;
178 			break;
179 		case 's':		/* do we need to swap bytes? */
180 			swab = 1;
181 			break;
182 		case 'i':		/* type of interleaving */
183 			if (strncmp(optarg, "pixel", 4) == 0)
184 				interleaving = PIXEL;
185 			else if  (strncmp(optarg, "band", 6) == 0)
186 				interleaving = BAND;
187 			else
188 				interleaving = 0;
189 			break;
190 		case 'o':
191 			outfilename = optarg;
192 			break;
193 		case 'h':
194 			usage();
195 		default:
196 			break;
197 		}
198         }
199 
200         if (argc - optind < 2)
201 		usage();
202 
203         fd = open(argv[optind], O_RDONLY|O_BINARY, 0);
204 	if (fd < 0) {
205 		fprintf(stderr, "%s: %s: Cannot open input file.\n",
206 			argv[0], argv[optind]);
207 		return (-1);
208 	}
209 
210 	if (guessSize(fd, dtype, hdr_size, nbands, swab, &width, &length) < 0)
211 		return 1;
212 
213 	if (outfilename == NULL)
214 		outfilename = argv[optind+1];
215 	out = TIFFOpen(outfilename, "w");
216 	if (out == NULL) {
217 		fprintf(stderr, "%s: %s: Cannot open file for output.\n",
218 			argv[0], outfilename);
219 		return (-1);
220 	}
221 	TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);
222 	TIFFSetField(out, TIFFTAG_IMAGELENGTH, length);
223 	TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
224 	TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, nbands);
225 	TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, depth * 8);
226 	TIFFSetField(out, TIFFTAG_FILLORDER, fillorder);
227 	TIFFSetField(out, TIFFTAG_PLANARCONFIG, config);
228 	TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);
229 	switch (dtype) {
230 	case TIFF_BYTE:
231 	case TIFF_SHORT:
232 	case TIFF_LONG:
233 		TIFFSetField(out, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
234 		break;
235 	case TIFF_SBYTE:
236 	case TIFF_SSHORT:
237 	case TIFF_SLONG:
238 		TIFFSetField(out, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT);
239 		break;
240 	case TIFF_FLOAT:
241 	case TIFF_DOUBLE:
242 		TIFFSetField(out, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP);
243 		break;
244 	default:
245 		TIFFSetField(out, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_VOID);
246 		break;
247 	}
248 	if (compression == (uint16) -1)
249 		compression = COMPRESSION_PACKBITS;
250 	TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
251 	switch (compression) {
252 	case COMPRESSION_JPEG:
253 		if (photometric == PHOTOMETRIC_RGB
254 		    && jpegcolormode == JPEGCOLORMODE_RGB)
255 			photometric = PHOTOMETRIC_YCBCR;
256 		TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);
257 		TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);
258 		break;
259 	case COMPRESSION_LZW:
260 	case COMPRESSION_DEFLATE:
261 		if (predictor != 0)
262 			TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);
263 		break;
264 	}
265 	switch(interleaving) {
266 	case BAND:				/* band interleaved data */
267 		linebytes = width * depth;
268 		buf = (unsigned char *)_TIFFmalloc(linebytes);
269 		break;
270 	case PIXEL:				/* pixel interleaved data */
271 	default:
272 		linebytes = width * nbands * depth;
273 		break;
274 	}
275 	bufsize = width * nbands * depth;
276 	buf1 = (unsigned char *)_TIFFmalloc(bufsize);
277 
278 	rowsperstrip = TIFFDefaultStripSize(out, rowsperstrip);
279 	if (rowsperstrip > length) {
280 		rowsperstrip = length;
281 	}
282 	TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, rowsperstrip );
283 
284 	lseek(fd, hdr_size, SEEK_SET);		/* Skip the file header */
285 	for (row = 0; row < length; row++) {
286 		switch(interleaving) {
287 		case BAND:			/* band interleaved data */
288 			for (band = 0; band < nbands; band++) {
289 				lseek(fd,
290 				      hdr_size + (length*band+row)*linebytes,
291 				      SEEK_SET);
292 				if (read(fd, buf, linebytes) < 0) {
293 					fprintf(stderr,
294 					"%s: %s: scanline %lu: Read error.\n",
295 					argv[0], argv[optind],
296 					(unsigned long) row);
297 				break;
298 				}
299 				if (swab)	/* Swap bytes if needed */
300 					swapBytesInScanline(buf, width, dtype);
301 				for (col = 0; col < width; col++)
302 					memcpy(buf1 + (col*nbands+band)*depth,
303 					       buf + col * depth, depth);
304 			}
305 			break;
306 		case PIXEL:			/* pixel interleaved data */
307 		default:
308 			if (read(fd, buf1, bufsize) < 0) {
309 				fprintf(stderr,
310 					"%s: %s: scanline %lu: Read error.\n",
311 					argv[0], argv[optind],
312 					(unsigned long) row);
313 				break;
314 			}
315 			if (swab)		/* Swap bytes if needed */
316 				swapBytesInScanline(buf1, width, dtype);
317 			break;
318 		}
319 
320 		if (TIFFWriteScanline(out, buf1, row, 0) < 0) {
321 			fprintf(stderr,	"%s: %s: scanline %lu: Write error.\n",
322 				argv[0], outfilename, (unsigned long) row);
323 			break;
324 		}
325 	}
326 	if (buf)
327 		_TIFFfree(buf);
328 	if (buf1)
329 		_TIFFfree(buf1);
330 	TIFFClose(out);
331 	return (0);
332 }
333 
334 static void
335 swapBytesInScanline(void *buf, uint32 width, TIFFDataType dtype)
336 {
337 	switch (dtype) {
338 		case TIFF_SHORT:
339 		case TIFF_SSHORT:
340 			TIFFSwabArrayOfShort((uint16*)buf,
341                                              (unsigned long)width);
342 			break;
343 		case TIFF_LONG:
344 		case TIFF_SLONG:
345 			TIFFSwabArrayOfLong((uint32*)buf,
346                                             (unsigned long)width);
347 			break;
348 		/* case TIFF_FLOAT: */	/* FIXME */
349 		case TIFF_DOUBLE:
350 			TIFFSwabArrayOfDouble((double*)buf,
351                                               (unsigned long)width);
352 			break;
353 		default:
354 			break;
355 	}
356 }
357 
358 static int
359 guessSize(int fd, TIFFDataType dtype, off_t hdr_size, uint32 nbands,
360 	  int swab, uint32 *width, uint32 *length)
361 {
362 	const float longt = 40.0;    /* maximum possible height/width ratio */
363 	char	    *buf1, *buf2;
364 	struct stat filestat;
365 	uint32	    w, h, scanlinesize, imagesize;
366 	uint32	    depth = TIFFDataWidth(dtype);
367 	float	    cor_coef = 0, tmp;
368 
369 	fstat(fd, &filestat);
370 
371 	if (filestat.st_size < hdr_size) {
372 		fprintf(stderr, "Too large header size specified.\n");
373 		return -1;
374 	}
375 
376 	imagesize = (filestat.st_size - hdr_size) / nbands / depth;
377 
378 	if (*width != 0 && *length == 0) {
379 		fprintf(stderr,	"Image height is not specified.\n");
380 
381 		*length = imagesize / *width;
382 
383 		fprintf(stderr, "Height is guessed as %lu.\n",
384 			(unsigned long)*length);
385 
386 		return 1;
387 	} else if (*width == 0 && *length != 0) {
388 		fprintf(stderr, "Image width is not specified.\n");
389 
390 		*width = imagesize / *length;
391 
392 		fprintf(stderr,	"Width is guessed as %lu.\n",
393 			(unsigned long)*width);
394 
395 		return 1;
396 	} else if (*width == 0 && *length == 0) {
397 		fprintf(stderr,	"Image width and height are not specified.\n");
398 
399 		for (w = (uint32) sqrt(imagesize / longt);
400 		     w < sqrt(imagesize * longt);
401 		     w++) {
402 			if (imagesize % w == 0) {
403 				scanlinesize = w * depth;
404 				buf1 = _TIFFmalloc(scanlinesize);
405 				buf2 = _TIFFmalloc(scanlinesize);
406 				h = imagesize / w;
407 				lseek(fd, hdr_size + (int)(h/2)*scanlinesize,
408 				      SEEK_SET);
409 				read(fd, buf1, scanlinesize);
410 				read(fd, buf2, scanlinesize);
411 				if (swab) {
412 					swapBytesInScanline(buf1, w, dtype);
413 					swapBytesInScanline(buf2, w, dtype);
414 				}
415 				tmp = (float) fabs(correlation(buf1, buf2,
416 							       w, dtype));
417 				if (tmp > cor_coef) {
418 					cor_coef = tmp;
419 					*width = w, *length = h;
420 				}
421 
422 				_TIFFfree(buf1);
423 				_TIFFfree(buf2);
424 			}
425 		}
426 
427 		fprintf(stderr,
428 			"Width is guessed as %lu, height is guessed as %lu.\n",
429 			(unsigned long)*width, (unsigned long)*length);
430 
431 		return 1;
432 	} else {
433 		if (filestat.st_size<(off_t)(hdr_size+(*width)*(*length)*nbands*depth)) {
434 			fprintf(stderr, "Input file too small.\n");
435 		return -1;
436 		}
437 	}
438 
439 	return 1;
440 }
441 
442 /* Calculate correlation coefficient between two numeric vectors */
443 static double
444 correlation(void *buf1, void *buf2, uint32 n_elem, TIFFDataType dtype)
445 {
446 	double	X, Y, M1 = 0.0, M2 = 0.0, D1 = 0.0, D2 = 0.0, K = 0.0;
447 	uint32	i;
448 
449 	switch (dtype) {
450 		case TIFF_BYTE:
451 		default:
452                         for (i = 0; i < n_elem; i++) {
453 				X = ((unsigned char *)buf1)[i];
454 				Y = ((unsigned char *)buf2)[i];
455 				M1 += X, M2 += Y;
456 				D1 += X * X, D2 += Y * Y;
457 				K += X * Y;
458                         }
459 			break;
460 		case TIFF_SBYTE:
461                         for (i = 0; i < n_elem; i++) {
462 				X = ((signed char *)buf1)[i];
463 				Y = ((signed char *)buf2)[i];
464 				M1 += X, M2 += Y;
465 				D1 += X * X, D2 += Y * Y;
466 				K += X * Y;
467                         }
468 			break;
469 		case TIFF_SHORT:
470                         for (i = 0; i < n_elem; i++) {
471 				X = ((uint16 *)buf1)[i];
472 				Y = ((uint16 *)buf2)[i];
473 				M1 += X, M2 += Y;
474 				D1 += X * X, D2 += Y * Y;
475 				K += X * Y;
476                         }
477 			break;
478 		case TIFF_SSHORT:
479                         for (i = 0; i < n_elem; i++) {
480 				X = ((int16 *)buf1)[i];
481 				Y = ((int16 *)buf2)[i];
482 				M1 += X, M2 += Y;
483 				D1 += X * X, D2 += Y * Y;
484 				K += X * Y;
485                         }
486 			break;
487 		case TIFF_LONG:
488                         for (i = 0; i < n_elem; i++) {
489 				X = ((uint32 *)buf1)[i];
490 				Y = ((uint32 *)buf2)[i];
491 				M1 += X, M2 += Y;
492 				D1 += X * X, D2 += Y * Y;
493 				K += X * Y;
494                         }
495 			break;
496 		case TIFF_SLONG:
497                         for (i = 0; i < n_elem; i++) {
498 				X = ((int32 *)buf1)[i];
499 				Y = ((int32 *)buf2)[i];
500 				M1 += X, M2 += Y;
501 				D1 += X * X, D2 += Y * Y;
502 				K += X * Y;
503                         }
504 			break;
505 		case TIFF_FLOAT:
506                         for (i = 0; i < n_elem; i++) {
507 				X = ((float *)buf1)[i];
508 				Y = ((float *)buf2)[i];
509 				M1 += X, M2 += Y;
510 				D1 += X * X, D2 += Y * Y;
511 				K += X * Y;
512                         }
513 			break;
514 		case TIFF_DOUBLE:
515                         for (i = 0; i < n_elem; i++) {
516 				X = ((double *)buf1)[i];
517 				Y = ((double *)buf2)[i];
518 				M1 += X, M2 += Y;
519 				D1 += X * X, D2 += Y * Y;
520 				K += X * Y;
521                         }
522 			break;
523 	}
524 
525 	M1 /= n_elem;
526 	M2 /= n_elem;
527 	D1 -= M1 * M1 * n_elem;
528 	D2 -= M2 * M2 * n_elem;
529 	K = (K - M1 * M2 * n_elem) / sqrt(D1 * D2);
530 
531 	return K;
532 }
533 
534 static int
535 processCompressOptions(char* opt)
536 {
537 	if (strcmp(opt, "none") == 0)
538 		compression = COMPRESSION_NONE;
539 	else if (strcmp(opt, "packbits") == 0)
540 		compression = COMPRESSION_PACKBITS;
541 	else if (strncmp(opt, "jpeg", 4) == 0) {
542 		char* cp = strchr(opt, ':');
543 
544                 compression = COMPRESSION_JPEG;
545                 while( cp )
546                 {
547                     if (isdigit((int)cp[1]))
548 			quality = atoi(cp+1);
549                     else if (cp[1] == 'r' )
550 			jpegcolormode = JPEGCOLORMODE_RAW;
551                     else
552                         usage();
553 
554                     cp = strchr(cp+1,':');
555                 }
556 	} else if (strncmp(opt, "lzw", 3) == 0) {
557 		char* cp = strchr(opt, ':');
558 		if (cp)
559 			predictor = atoi(cp+1);
560 		compression = COMPRESSION_LZW;
561 	} else if (strncmp(opt, "zip", 3) == 0) {
562 		char* cp = strchr(opt, ':');
563 		if (cp)
564 			predictor = atoi(cp+1);
565 		compression = COMPRESSION_DEFLATE;
566 	} else
567 		return (0);
568 	return (1);
569 }
570 
571 static char* stuff[] = {
572 "raw2tiff --- tool for converting raw byte sequences in TIFF images",
573 "usage: raw2tiff [options] input.raw output.tif",
574 "where options are:",
575 " -L		input data has LSB2MSB bit order (default)",
576 " -M		input data has MSB2LSB bit order",
577 " -r #		make each strip have no more than # rows",
578 " -H #		size of input image file header in bytes (0 by default)",
579 " -w #		width of input image in pixels",
580 " -l #		length of input image in lines",
581 " -b #		number of bands in input image (1 by default)",
582 "",
583 " -d data_type	type of samples in input image",
584 "where data_type may be:",
585 " byte		8-bit unsigned integer (default)",
586 " short		16-bit unsigned integer",
587 " long		32-bit unsigned integer",
588 " sbyte		8-bit signed integer",
589 " sshort		16-bit signed integer",
590 " slong		32-bit signed integer",
591 " float		32-bit IEEE floating point",
592 " double		64-bit IEEE floating point",
593 "",
594 " -p photo	photometric interpretation (color space) of the input image",
595 "where photo may be:",
596 " miniswhite	white color represented with 0 value",
597 " minisblack	black color represented with 0 value (default)",
598 " rgb		image has RGB color model",
599 " cmyk		image has CMYK (separated) color model",
600 " ycbcr		image has YCbCr color model",
601 " cielab		image has CIE L*a*b color model",
602 " icclab		image has ICC L*a*b color model",
603 " itulab		image has ITU L*a*b color model",
604 "",
605 " -s		swap bytes fetched from input file",
606 "",
607 " -i config	type of samples interleaving in input image",
608 "where config may be:",
609 " pixel		pixel interleaved data (default)",
610 " band		band interleaved data",
611 "",
612 " -c lzw[:opts]	compress output with Lempel-Ziv & Welch encoding",
613 " -c zip[:opts]	compress output with deflate encoding",
614 " -c jpeg[:opts]	compress output with JPEG encoding",
615 " -c packbits	compress output with packbits encoding",
616 " -c none	use no compression algorithm on output",
617 "",
618 "JPEG options:",
619 " #		set compression quality level (0-100, default 75)",
620 " r		output color image as RGB rather than YCbCr",
621 "For example, -c jpeg:r:50 to get JPEG-encoded RGB data with 50% comp. quality",
622 "",
623 "LZW and deflate options:",
624 " #		set predictor value",
625 "For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
626 " -o out.tif	write output to out.tif",
627 " -h		this help message",
628 NULL
629 };
630 
631 static void
632 usage(void)
633 {
634 	char buf[BUFSIZ];
635 	int i;
636 
637 	setbuf(stderr, buf);
638         fprintf(stderr, "%s\n\n", TIFFGetVersion());
639 	for (i = 0; stuff[i] != NULL; i++)
640 		fprintf(stderr, "%s\n", stuff[i]);
641 	exit(-1);
642 }
643 
644 /* vim: set ts=8 sts=8 sw=8 noet: */
645 /*
646  * Local Variables:
647  * mode: c
648  * c-basic-offset: 8
649  * fill-column: 78
650  * End:
651  */
652