[wxWidgets.git] / src / tiff / tools / tiff2bw.c

/* $Id$ */

/*
 * Copyright (c) 1988-1997 Sam Leffler
 * Copyright (c) 1991-1997 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 <ctype.h>

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#include "tiffio.h"

#define	streq(a,b)	(strcmp((a),(b)) == 0)
#define	strneq(a,b,n)	(strncmp(a,b,n) == 0)

/* x% weighting -> fraction of full color */
#define	PCT(x)	(((x)*255+127)/100)
int	RED = PCT(30);		/* 30% */
int	GREEN = PCT(59);	/* 59% */
int	BLUE = PCT(11);		/* 11% */

static	void usage(void);
static	int processCompressOptions(char*);

static void
compresscontig(unsigned char* out, unsigned char* rgb, uint32 n)
{
	register int v, red = RED, green = GREEN, blue = BLUE;

	while (n-- > 0) {
		v = red*(*rgb++);
		v += green*(*rgb++);
		v += blue*(*rgb++);
		*out++ = v>>8;
	}
}

static void
compresssep(unsigned char* out,
	    unsigned char* r, unsigned char* g, unsigned char* b, uint32 n)
{
	register uint32 red = RED, green = GREEN, blue = BLUE;

	while (n-- > 0)
		*out++ = (unsigned char)
			((red*(*r++) + green*(*g++) + blue*(*b++)) >> 8);
}

static int
checkcmap(TIFF* tif, int n, uint16* r, uint16* g, uint16* b)
{
	while (n-- > 0)
		if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256)
			return (16);
	TIFFWarning(TIFFFileName(tif), "Assuming 8-bit colormap");
	return (8);
}

static void
compresspalette(unsigned char* out, unsigned char* data, uint32 n, uint16* rmap, uint16* gmap, uint16* bmap)
{
	register int v, red = RED, green = GREEN, blue = BLUE;

	while (n-- > 0) {
		unsigned int ix = *data++;
		v = red*rmap[ix];
		v += green*gmap[ix];
		v += blue*bmap[ix];
		*out++ = v>>8;
	}
}

static	uint16 compression = (uint16) -1;
static	uint16 predictor = 0;
static	int jpegcolormode = JPEGCOLORMODE_RGB;
static	int quality = 75;		/* JPEG quality */

static	void cpTags(TIFF* in, TIFF* out);

int
main(int argc, char* argv[])
{
	uint32 rowsperstrip = (uint32) -1;
	TIFF *in, *out;
	uint32 w, h;
	uint16 samplesperpixel;
	uint16 bitspersample;
	uint16 config;
	uint16 photometric;
	uint16* red;
	uint16* green;
	uint16* blue;
	tsize_t rowsize;
	register uint32 row;
	register tsample_t s;
	unsigned char *inbuf, *outbuf;
	char thing[1024];
	int c;
	extern int optind;
	extern char *optarg;

	while ((c = getopt(argc, argv, "c:r:R:G:B:")) != -1)
		switch (c) {
		case 'c':		/* compression scheme */
			if (!processCompressOptions(optarg))
				usage();
			break;
		case 'r':		/* rows/strip */
			rowsperstrip = atoi(optarg);
			break;
		case 'R':
			RED = PCT(atoi(optarg));
			break;
		case 'G':
			GREEN = PCT(atoi(optarg));
			break;
		case 'B':
			BLUE = PCT(atoi(optarg));
			break;
		case '?':
			usage();
			/*NOTREACHED*/
		}
	if (argc - optind < 2)
		usage();
	in = TIFFOpen(argv[optind], "r");
	if (in == NULL)
		return (-1);
	photometric = 0;
	TIFFGetField(in, TIFFTAG_PHOTOMETRIC, &photometric);
	if (photometric != PHOTOMETRIC_RGB && photometric != PHOTOMETRIC_PALETTE ) {
		fprintf(stderr,
	    "%s: Bad photometric; can only handle RGB and Palette images.\n",
		    argv[optind]);
		return (-1);
	}
	TIFFGetField(in, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel);
	if (samplesperpixel != 1 && samplesperpixel != 3) {
		fprintf(stderr, "%s: Bad samples/pixel %u.\n",
		    argv[optind], samplesperpixel);
		return (-1);
	}
	TIFFGetField(in, TIFFTAG_BITSPERSAMPLE, &bitspersample);
	if (bitspersample != 8) {
		fprintf(stderr,
		    " %s: Sorry, only handle 8-bit samples.\n", argv[optind]);
		return (-1);
	}
	TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &w);
	TIFFGetField(in, TIFFTAG_IMAGELENGTH, &h);
	TIFFGetField(in, TIFFTAG_PLANARCONFIG, &config);

	out = TIFFOpen(argv[optind+1], "w");
	if (out == NULL)
		return (-1);
	TIFFSetField(out, TIFFTAG_IMAGEWIDTH, w);
	TIFFSetField(out, TIFFTAG_IMAGELENGTH, h);
	TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
	TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 1);
	TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
	cpTags(in, out);
	if (compression != (uint16) -1) {
		TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
		switch (compression) {
		case COMPRESSION_JPEG:
			TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);
			TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);
			break;
		case COMPRESSION_LZW:
		case COMPRESSION_DEFLATE:
			if (predictor != 0)
				TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);
			break;
		}
	}
	TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
	sprintf(thing, "B&W version of %s", argv[optind]);
	TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, thing);
	TIFFSetField(out, TIFFTAG_SOFTWARE, "tiff2bw");
	outbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(out));
	TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
	    TIFFDefaultStripSize(out, rowsperstrip));

#define	pack(a,b)	((a)<<8 | (b))
	switch (pack(photometric, config)) {
	case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_CONTIG):
	case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_SEPARATE):
		TIFFGetField(in, TIFFTAG_COLORMAP, &red, &green, &blue);
		/*
		 * Convert 16-bit colormap to 8-bit (unless it looks
		 * like an old-style 8-bit colormap).
		 */
		if (checkcmap(in, 1<<bitspersample, red, green, blue) == 16) {
			int i;
#define	CVT(x)		(((x) * 255L) / ((1L<<16)-1))
			for (i = (1<<bitspersample)-1; i >= 0; i--) {
				red[i] = CVT(red[i]);
				green[i] = CVT(green[i]);
				blue[i] = CVT(blue[i]);
			}
#undef CVT
		}
		inbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(in));
		for (row = 0; row < h; row++) {
			if (TIFFReadScanline(in, inbuf, row, 0) < 0)
				break;
			compresspalette(outbuf, inbuf, w, red, green, blue);
			if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
				break;
		}
		break;
	case pack(PHOTOMETRIC_RGB, PLANARCONFIG_CONTIG):
		inbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(in));
		for (row = 0; row < h; row++) {
			if (TIFFReadScanline(in, inbuf, row, 0) < 0)
				break;
			compresscontig(outbuf, inbuf, w);
			if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
				break;
		}
		break;
	case pack(PHOTOMETRIC_RGB, PLANARCONFIG_SEPARATE):
		rowsize = TIFFScanlineSize(in);
		inbuf = (unsigned char *)_TIFFmalloc(3*rowsize);
		for (row = 0; row < h; row++) {
			for (s = 0; s < 3; s++)
				if (TIFFReadScanline(in,
				    inbuf+s*rowsize, row, s) < 0)
					 return (-1);
			compresssep(outbuf,
			    inbuf, inbuf+rowsize, inbuf+2*rowsize, w);
			if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
				break;
		}
		break;
	}
#undef pack
	TIFFClose(out);
	return (0);
}

static int
processCompressOptions(char* opt)
{
	if (streq(opt, "none"))
		compression = COMPRESSION_NONE;
	else if (streq(opt, "packbits"))
		compression = COMPRESSION_PACKBITS;
	else if (strneq(opt, "jpeg", 4)) {
		char* cp = strchr(opt, ':');

                compression = COMPRESSION_JPEG;
                while( cp )
                {
                    if (isdigit((int)cp[1]))
			quality = atoi(cp+1);
                    else if (cp[1] == 'r' )
			jpegcolormode = JPEGCOLORMODE_RAW;
                    else
                        usage();

                    cp = strchr(cp+1,':');
                }
	} else if (strneq(opt, "lzw", 3)) {
		char* cp = strchr(opt, ':');
		if (cp)
			predictor = atoi(cp+1);
		compression = COMPRESSION_LZW;
	} else if (strneq(opt, "zip", 3)) {
		char* cp = strchr(opt, ':');
		if (cp)
			predictor = atoi(cp+1);
		compression = COMPRESSION_DEFLATE;
	} else
		return (0);
	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_SUBFILETYPE,		1, TIFF_LONG },
	{ 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_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_RESOLUTIONUNIT,	1, 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_INKSET,		1, TIFF_SHORT },
	{ 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 },
	{ TIFFTAG_SMINSAMPLEVALUE,	1, TIFF_DOUBLE },
	{ TIFFTAG_SMAXSAMPLEVALUE,	1, TIFF_DOUBLE },
	{ TIFFTAG_STONITS,		1, TIFF_DOUBLE },
};
#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

char* stuff[] = {
"usage: tiff2bw [options] input.tif output.tif",
"where options are:",
" -R %		use #% from red channel",
" -G %		use #% from green channel",
" -B %		use #% from blue channel",
"",
" -r #		make each strip have no more than # rows",
"",
" -c lzw[:opts]	compress output with Lempel-Ziv & Welch encoding",
" -c zip[:opts]	compress output with deflate encoding",
" -c packbits	compress output with packbits encoding",
" -c g3[:opts]	compress output with CCITT Group 3 encoding",
" -c g4		compress output with CCITT Group 4 encoding",
" -c none	use no compression algorithm on output",
"",
"LZW and deflate options:",
" #		set predictor value",
"For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
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: */
Commit	Line	Data
8414a40c VZ	1	/* $Id$ */
	2
	3	/*
	4	* Copyright (c) 1988-1997 Sam Leffler
	5	* Copyright (c) 1991-1997 Silicon Graphics, Inc.
	6	*
	7	* Permission to use, copy, modify, distribute, and sell this software and
	8	* its documentation for any purpose is hereby granted without fee, provided
	9	* that (i) the above copyright notices and this permission notice appear in
	10	* all copies of the software and related documentation, and (ii) the names of
	11	* Sam Leffler and Silicon Graphics may not be used in any advertising or
	12	* publicity relating to the software without the specific, prior written
	13	* permission of Sam Leffler and Silicon Graphics.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	16	* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	17	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	18	*
	19	* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	20	* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	21	* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	22	* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	23	* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	24	* OF THIS SOFTWARE.
	25	*/
	26
	27	#include "tif_config.h"
	28
	29	#include <stdio.h>
	30	#include <stdlib.h>
	31	#include <string.h>
	32	#include <ctype.h>
	33
	34	#ifdef HAVE_UNISTD_H
	35	# include <unistd.h>
	36	#endif
	37
	38	#include "tiffio.h"
	39
	40	#define streq(a,b) (strcmp((a),(b)) == 0)
	41	#define strneq(a,b,n) (strncmp(a,b,n) == 0)
	42
	43	/* x% weighting -> fraction of full color */
	44	#define PCT(x) (((x)*255+127)/100)
	45	int RED = PCT(30); /* 30% */
	46	int GREEN = PCT(59); /* 59% */
	47	int BLUE = PCT(11); /* 11% */
	48
	49	static void usage(void);
	50	static int processCompressOptions(char*);
	51
	52	static void
	53	compresscontig(unsigned char* out, unsigned char* rgb, uint32 n)
	54	{
	55	register int v, red = RED, green = GREEN, blue = BLUE;
	56
	57	while (n-- > 0) {
	58	v = red(rgb++);
	59	v += green(rgb++);
	60	v += blue(rgb++);
	61	*out++ = v>>8;
	62	}
	63	}
	64
65	static void
66	compresssep(unsigned char* out,
67	unsigned char* r, unsigned char* g, unsigned char* b, uint32 n)
68	{
69	register uint32 red = RED, green = GREEN, blue = BLUE;
70
71	while (n-- > 0)
72	*out++ = (unsigned char)
73	((red(r++) + green(g++) + blue(b++)) >> 8);
74	}
75
76	static int
77	checkcmap(TIFF* tif, int n, uint16* r, uint16* g, uint16* b)
78	{
79	while (n-- > 0)
80	if (r++ >= 256 \|\| g++ >= 256 \|\| *b++ >= 256)
81	return (16);
82	TIFFWarning(TIFFFileName(tif), "Assuming 8-bit colormap");
83	return (8);
84	}
85
86	static void
87	compresspalette(unsigned char* out, unsigned char* data, uint32 n, uint16* rmap, uint16* gmap, uint16* bmap)
88	{
89	register int v, red = RED, green = GREEN, blue = BLUE;
90
91	while (n-- > 0) {
92	unsigned int ix = *data++;
93	v = red*rmap[ix];
94	v += green*gmap[ix];
95	v += blue*bmap[ix];
96	*out++ = v>>8;
97	}
98	}
99
100	static uint16 compression = (uint16) -1;
101	static uint16 predictor = 0;
102	static int jpegcolormode = JPEGCOLORMODE_RGB;
103	static int quality = 75; /* JPEG quality */
104
105	static void cpTags(TIFF* in, TIFF* out);
106
107	int
108	main(int argc, char* argv[])
109	{
110	uint32 rowsperstrip = (uint32) -1;
111	TIFF in, out;
112	uint32 w, h;
113	uint16 samplesperpixel;
114	uint16 bitspersample;
115	uint16 config;
116	uint16 photometric;
117	uint16* red;
118	uint16* green;
119	uint16* blue;
120	tsize_t rowsize;
121	register uint32 row;
122	register tsample_t s;
123	unsigned char inbuf, outbuf;
124	char thing[1024];
125	int c;
126	extern int optind;
127	extern char *optarg;
128
129	while ((c = getopt(argc, argv, "c:r:R:G:B:")) != -1)
130	switch (c) {
131	case 'c': /* compression scheme */
132	if (!processCompressOptions(optarg))
133	usage();
134	break;
135	case 'r': /* rows/strip */
136	rowsperstrip = atoi(optarg);
137	break;
138	case 'R':
139	RED = PCT(atoi(optarg));
140	break;
141	case 'G':
142	GREEN = PCT(atoi(optarg));
143	break;
144	case 'B':
145	BLUE = PCT(atoi(optarg));
146	break;
147	case '?':
148	usage();
149	/NOTREACHED/
150	}
151	if (argc - optind < 2)
152	usage();
153	in = TIFFOpen(argv[optind], "r");
154	if (in == NULL)
155	return (-1);
156	photometric = 0;
157	TIFFGetField(in, TIFFTAG_PHOTOMETRIC, &photometric);
158	if (photometric != PHOTOMETRIC_RGB && photometric != PHOTOMETRIC_PALETTE ) {
159	fprintf(stderr,
160	"%s: Bad photometric; can only handle RGB and Palette images.\n",
161	argv[optind]);
162	return (-1);
163	}
164	TIFFGetField(in, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel);
165	if (samplesperpixel != 1 && samplesperpixel != 3) {
166	fprintf(stderr, "%s: Bad samples/pixel %u.\n",
167	argv[optind], samplesperpixel);
168	return (-1);
169	}
170	TIFFGetField(in, TIFFTAG_BITSPERSAMPLE, &bitspersample);
171	if (bitspersample != 8) {
172	fprintf(stderr,
173	" %s: Sorry, only handle 8-bit samples.\n", argv[optind]);
174	return (-1);
175	}
176	TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &w);
177	TIFFGetField(in, TIFFTAG_IMAGELENGTH, &h);
178	TIFFGetField(in, TIFFTAG_PLANARCONFIG, &config);
179
180	out = TIFFOpen(argv[optind+1], "w");
181	if (out == NULL)
182	return (-1);
183	TIFFSetField(out, TIFFTAG_IMAGEWIDTH, w);
184	TIFFSetField(out, TIFFTAG_IMAGELENGTH, h);
185	TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
186	TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 1);
187	TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
188	cpTags(in, out);
189	if (compression != (uint16) -1) {
190	TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
191	switch (compression) {
192	case COMPRESSION_JPEG:
193	TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);
194	TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);
195	break;
196	case COMPRESSION_LZW:
197	case COMPRESSION_DEFLATE:
198	if (predictor != 0)
199	TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);
200	break;
201	}
202	}
203	TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
204	sprintf(thing, "B&W version of %s", argv[optind]);
205	TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, thing);
206	TIFFSetField(out, TIFFTAG_SOFTWARE, "tiff2bw");
207	outbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(out));
208	TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
209	TIFFDefaultStripSize(out, rowsperstrip));
210
211	#define pack(a,b) ((a)<<8 \| (b))
212	switch (pack(photometric, config)) {
213	case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_CONTIG):
214	case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_SEPARATE):
215	TIFFGetField(in, TIFFTAG_COLORMAP, &red, &green, &blue);
216	/*
217	* Convert 16-bit colormap to 8-bit (unless it looks
218	* like an old-style 8-bit colormap).
219	*/
220	if (checkcmap(in, 1<<bitspersample, red, green, blue) == 16) {
221	int i;
222	#define CVT(x) (((x) * 255L) / ((1L<<16)-1))
223	for (i = (1<<bitspersample)-1; i >= 0; i--) {
224	red[i] = CVT(red[i]);
225	green[i] = CVT(green[i]);
226	blue[i] = CVT(blue[i]);
227	}
228	#undef CVT
229	}
230	inbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(in));
231	for (row = 0; row < h; row++) {
232	if (TIFFReadScanline(in, inbuf, row, 0) < 0)
233	break;
234	compresspalette(outbuf, inbuf, w, red, green, blue);
235	if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
236	break;
237	}
238	break;
239	case pack(PHOTOMETRIC_RGB, PLANARCONFIG_CONTIG):
240	inbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(in));
241	for (row = 0; row < h; row++) {
242	if (TIFFReadScanline(in, inbuf, row, 0) < 0)
243	break;
244	compresscontig(outbuf, inbuf, w);
245	if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
246	break;
247	}
248	break;
249	case pack(PHOTOMETRIC_RGB, PLANARCONFIG_SEPARATE):
250	rowsize = TIFFScanlineSize(in);
251	inbuf = (unsigned char )_TIFFmalloc(3rowsize);
252	for (row = 0; row < h; row++) {
253	for (s = 0; s < 3; s++)
254	if (TIFFReadScanline(in,
255	inbuf+s*rowsize, row, s) < 0)
256	return (-1);
257	compresssep(outbuf,
258	inbuf, inbuf+rowsize, inbuf+2*rowsize, w);
259	if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
260	break;
261	}
262	break;
263	}
264	#undef pack
265	TIFFClose(out);
266	return (0);
267	}
268
269	static int
270	processCompressOptions(char* opt)
271	{
272	if (streq(opt, "none"))
273	compression = COMPRESSION_NONE;
274	else if (streq(opt, "packbits"))
275	compression = COMPRESSION_PACKBITS;
276	else if (strneq(opt, "jpeg", 4)) {
277	char* cp = strchr(opt, ':');
278
279	compression = COMPRESSION_JPEG;
280	while( cp )
281	{
282	if (isdigit((int)cp[1]))
283	quality = atoi(cp+1);
284	else if (cp[1] == 'r' )
285	jpegcolormode = JPEGCOLORMODE_RAW;
286	else
287	usage();
288
289	cp = strchr(cp+1,':');
290	}
291	} else if (strneq(opt, "lzw", 3)) {
292	char* cp = strchr(opt, ':');
293	if (cp)
294	predictor = atoi(cp+1);
295	compression = COMPRESSION_LZW;
296	} else if (strneq(opt, "zip", 3)) {
297	char* cp = strchr(opt, ':');
298	if (cp)
299	predictor = atoi(cp+1);
300	compression = COMPRESSION_DEFLATE;
301	} else
302	return (0);
303	return (1);
304	}
305
306	#define CopyField(tag, v) \
307	if (TIFFGetField(in, tag, &v)) TIFFSetField(out, tag, v)
308	#define CopyField2(tag, v1, v2) \
309	if (TIFFGetField(in, tag, &v1, &v2)) TIFFSetField(out, tag, v1, v2)
310	#define CopyField3(tag, v1, v2, v3) \
311	if (TIFFGetField(in, tag, &v1, &v2, &v3)) TIFFSetField(out, tag, v1, v2, v3)
312	#define CopyField4(tag, v1, v2, v3, v4) \
313	if (TIFFGetField(in, tag, &v1, &v2, &v3, &v4)) TIFFSetField(out, tag, v1, v2, v3, v4)
314
315	static void
316	cpTag(TIFF* in, TIFF* out, uint16 tag, uint16 count, TIFFDataType type)
317	{
318	switch (type) {
319	case TIFF_SHORT:
320	if (count == 1) {
321	uint16 shortv;
322	CopyField(tag, shortv);
323	} else if (count == 2) {
324	uint16 shortv1, shortv2;
325	CopyField2(tag, shortv1, shortv2);
326	} else if (count == 4) {
327	uint16 tr, tg, tb, ta;
328	CopyField4(tag, tr, tg, tb, ta);
329	} else if (count == (uint16) -1) {
330	uint16 shortv1;
331	uint16* shortav;
332	CopyField2(tag, shortv1, shortav);
333	}
334	break;
335	case TIFF_LONG:
336	{ uint32 longv;
337	CopyField(tag, longv);
338	}
339	break;
340	case TIFF_RATIONAL:
341	if (count == 1) {
342	float floatv;
343	CopyField(tag, floatv);
344	} else if (count == (uint16) -1) {
345	float* floatav;
346	CopyField(tag, floatav);
347	}
348	break;
349	case TIFF_ASCII:
350	{ char* stringv;
351	CopyField(tag, stringv);
352	}
353	break;
354	case TIFF_DOUBLE:
355	if (count == 1) {
356	double doublev;
357	CopyField(tag, doublev);
358	} else if (count == (uint16) -1) {
359	double* doubleav;
360	CopyField(tag, doubleav);
361	}
362	break;
363	default:
364	TIFFError(TIFFFileName(in),
365	"Data type %d is not supported, tag %d skipped.",
366	tag, type);
367	}
368	}
369
370	#undef CopyField4
371	#undef CopyField3
372	#undef CopyField2
373	#undef CopyField
374
375	static struct cpTag {
376	uint16 tag;
377	uint16 count;
378	TIFFDataType type;
379	} tags[] = {
380	{ TIFFTAG_SUBFILETYPE, 1, TIFF_LONG },
381	{ TIFFTAG_THRESHHOLDING, 1, TIFF_SHORT },
382	{ TIFFTAG_DOCUMENTNAME, 1, TIFF_ASCII },
383	{ TIFFTAG_IMAGEDESCRIPTION, 1, TIFF_ASCII },
384	{ TIFFTAG_MAKE, 1, TIFF_ASCII },
385	{ TIFFTAG_MODEL, 1, TIFF_ASCII },
386	{ TIFFTAG_MINSAMPLEVALUE, 1, TIFF_SHORT },
387	{ TIFFTAG_MAXSAMPLEVALUE, 1, TIFF_SHORT },
388	{ TIFFTAG_XRESOLUTION, 1, TIFF_RATIONAL },
389	{ TIFFTAG_YRESOLUTION, 1, TIFF_RATIONAL },
390	{ TIFFTAG_PAGENAME, 1, TIFF_ASCII },
391	{ TIFFTAG_XPOSITION, 1, TIFF_RATIONAL },
392	{ TIFFTAG_YPOSITION, 1, TIFF_RATIONAL },
393	{ TIFFTAG_RESOLUTIONUNIT, 1, TIFF_SHORT },
394	{ TIFFTAG_SOFTWARE, 1, TIFF_ASCII },
395	{ TIFFTAG_DATETIME, 1, TIFF_ASCII },
396	{ TIFFTAG_ARTIST, 1, TIFF_ASCII },
397	{ TIFFTAG_HOSTCOMPUTER, 1, TIFF_ASCII },
398	{ TIFFTAG_WHITEPOINT, 1, TIFF_RATIONAL },
399	{ TIFFTAG_PRIMARYCHROMATICITIES,(uint16) -1,TIFF_RATIONAL },
400	{ TIFFTAG_HALFTONEHINTS, 2, TIFF_SHORT },
401	{ TIFFTAG_INKSET, 1, TIFF_SHORT },
402	{ TIFFTAG_DOTRANGE, 2, TIFF_SHORT },
403	{ TIFFTAG_TARGETPRINTER, 1, TIFF_ASCII },
404	{ TIFFTAG_SAMPLEFORMAT, 1, TIFF_SHORT },
405	{ TIFFTAG_YCBCRCOEFFICIENTS, (uint16) -1,TIFF_RATIONAL },
406	{ TIFFTAG_YCBCRSUBSAMPLING, 2, TIFF_SHORT },
407	{ TIFFTAG_YCBCRPOSITIONING, 1, TIFF_SHORT },
408	{ TIFFTAG_REFERENCEBLACKWHITE, (uint16) -1,TIFF_RATIONAL },
409	{ TIFFTAG_EXTRASAMPLES, (uint16) -1, TIFF_SHORT },
410	{ TIFFTAG_SMINSAMPLEVALUE, 1, TIFF_DOUBLE },
411	{ TIFFTAG_SMAXSAMPLEVALUE, 1, TIFF_DOUBLE },
412	{ TIFFTAG_STONITS, 1, TIFF_DOUBLE },
413	};
414	#define NTAGS (sizeof (tags) / sizeof (tags[0]))
415
416	static void
417	cpTags(TIFF* in, TIFF* out)
418	{
419	struct cpTag *p;
420	for (p = tags; p < &tags[NTAGS]; p++)
421	cpTag(in, out, p->tag, p->count, p->type);
422	}
423	#undef NTAGS
424
425	char* stuff[] = {
426	"usage: tiff2bw [options] input.tif output.tif",
427	"where options are:",
428	" -R % use #% from red channel",
429	" -G % use #% from green channel",
430	" -B % use #% from blue channel",
431	"",
432	" -r # make each strip have no more than # rows",
433	"",
434	" -c lzw[:opts] compress output with Lempel-Ziv & Welch encoding",
435	" -c zip[:opts] compress output with deflate encoding",
436	" -c packbits compress output with packbits encoding",
437	" -c g3[:opts] compress output with CCITT Group 3 encoding",
438	" -c g4 compress output with CCITT Group 4 encoding",
439	" -c none use no compression algorithm on output",
440	"",
441	"LZW and deflate options:",
442	" # set predictor value",
443	"For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
444	NULL
445	};
446
447	static void
448	usage(void)
449	{
450	char buf[BUFSIZ];
451	int i;
452
453	setbuf(stderr, buf);
454	fprintf(stderr, "%s\n\n", TIFFGetVersion());
455	for (i = 0; stuff[i] != NULL; i++)
456	fprintf(stderr, "%s\n", stuff[i]);
457	exit(-1);
458	}
459
460	/* vim: set ts=8 sts=8 sw=8 noet: */