[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

#ifdef NEED_LIBPORT
# include "libport.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,		2, 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: */
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 8
 * fill-column: 78
 * End:
 */
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
80ed523f VZ	38	#ifdef NEED_LIBPORT
	39	# include "libport.h"
	40	#endif
	41
8414a40c VZ	42	#include "tiffio.h"
	43
	44	#define streq(a,b) (strcmp((a),(b)) == 0)
	45	#define strneq(a,b,n) (strncmp(a,b,n) == 0)
	46
	47	/* x% weighting -> fraction of full color */
	48	#define PCT(x) (((x)*255+127)/100)
	49	int RED = PCT(30); /* 30% */
	50	int GREEN = PCT(59); /* 59% */
	51	int BLUE = PCT(11); /* 11% */
	52
	53	static void usage(void);
	54	static int processCompressOptions(char*);
	55
	56	static void
	57	compresscontig(unsigned char* out, unsigned char* rgb, uint32 n)
	58	{
	59	register int v, red = RED, green = GREEN, blue = BLUE;
	60
	61	while (n-- > 0) {
	62	v = red(rgb++);
	63	v += green(rgb++);
	64	v += blue(rgb++);
	65	*out++ = v>>8;
	66	}
	67	}
	68
	69	static void
	70	compresssep(unsigned char* out,
	71	unsigned char* r, unsigned char* g, unsigned char* b, uint32 n)
	72	{
	73	register uint32 red = RED, green = GREEN, blue = BLUE;
	74
	75	while (n-- > 0)
	76	*out++ = (unsigned char)
	77	((red(r++) + green(g++) + blue(b++)) >> 8);
	78	}
	79
	80	static int
	81	checkcmap(TIFF* tif, int n, uint16* r, uint16* g, uint16* b)
	82	{
	83	while (n-- > 0)
	84	if (r++ >= 256 \|\| g++ >= 256 \|\| *b++ >= 256)
	85	return (16);
	86	TIFFWarning(TIFFFileName(tif), "Assuming 8-bit colormap");
	87	return (8);
	88	}
	89
	90	static void
	91	compresspalette(unsigned char* out, unsigned char* data, uint32 n, uint16* rmap, uint16* gmap, uint16* bmap)
	92	{
	93	register int v, red = RED, green = GREEN, blue = BLUE;
	94
	95	while (n-- > 0) {
	96	unsigned int ix = *data++;
	97	v = red*rmap[ix];
	98	v += green*gmap[ix];
	99	v += blue*bmap[ix];
	100	*out++ = v>>8;
	101	}
	102	}
	103
	104	static uint16 compression = (uint16) -1;
	105	static uint16 predictor = 0;
106	static int jpegcolormode = JPEGCOLORMODE_RGB;
107	static int quality = 75; /* JPEG quality */
108
109	static void cpTags(TIFF* in, TIFF* out);
110
111	int
112	main(int argc, char* argv[])
113	{
114	uint32 rowsperstrip = (uint32) -1;
115	TIFF in, out;
116	uint32 w, h;
117	uint16 samplesperpixel;
118	uint16 bitspersample;
119	uint16 config;
120	uint16 photometric;
121	uint16* red;
122	uint16* green;
123	uint16* blue;
124	tsize_t rowsize;
125	register uint32 row;
126	register tsample_t s;
127	unsigned char inbuf, outbuf;
128	char thing[1024];
129	int c;
130	extern int optind;
131	extern char *optarg;
132
133	while ((c = getopt(argc, argv, "c:r:R:G:B:")) != -1)
134	switch (c) {
135	case 'c': /* compression scheme */
136	if (!processCompressOptions(optarg))
137	usage();
138	break;
139	case 'r': /* rows/strip */
140	rowsperstrip = atoi(optarg);
141	break;
142	case 'R':
143	RED = PCT(atoi(optarg));
144	break;
145	case 'G':
146	GREEN = PCT(atoi(optarg));
147	break;
148	case 'B':
149	BLUE = PCT(atoi(optarg));
150	break;
151	case '?':
152	usage();
153	/NOTREACHED/
154	}
155	if (argc - optind < 2)
156	usage();
157	in = TIFFOpen(argv[optind], "r");
158	if (in == NULL)
159	return (-1);
160	photometric = 0;
161	TIFFGetField(in, TIFFTAG_PHOTOMETRIC, &photometric);
162	if (photometric != PHOTOMETRIC_RGB && photometric != PHOTOMETRIC_PALETTE ) {
163	fprintf(stderr,
164	"%s: Bad photometric; can only handle RGB and Palette images.\n",
165	argv[optind]);
166	return (-1);
167	}
168	TIFFGetField(in, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel);
169	if (samplesperpixel != 1 && samplesperpixel != 3) {
170	fprintf(stderr, "%s: Bad samples/pixel %u.\n",
171	argv[optind], samplesperpixel);
172	return (-1);
173	}
174	TIFFGetField(in, TIFFTAG_BITSPERSAMPLE, &bitspersample);
175	if (bitspersample != 8) {
176	fprintf(stderr,
177	" %s: Sorry, only handle 8-bit samples.\n", argv[optind]);
178	return (-1);
179	}
180	TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &w);
181	TIFFGetField(in, TIFFTAG_IMAGELENGTH, &h);
182	TIFFGetField(in, TIFFTAG_PLANARCONFIG, &config);
183
184	out = TIFFOpen(argv[optind+1], "w");
185	if (out == NULL)
186	return (-1);
187	TIFFSetField(out, TIFFTAG_IMAGEWIDTH, w);
188	TIFFSetField(out, TIFFTAG_IMAGELENGTH, h);
189	TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
190	TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 1);
191	TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
192	cpTags(in, out);
193	if (compression != (uint16) -1) {
194	TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
195	switch (compression) {
196	case COMPRESSION_JPEG:
197	TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);
198	TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);
199	break;
200	case COMPRESSION_LZW:
201	case COMPRESSION_DEFLATE:
202	if (predictor != 0)
203	TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);
204	break;
205	}
206	}
207	TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
208	sprintf(thing, "B&W version of %s", argv[optind]);
209	TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, thing);
210	TIFFSetField(out, TIFFTAG_SOFTWARE, "tiff2bw");
211	outbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(out));
212	TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
213	TIFFDefaultStripSize(out, rowsperstrip));
214
215	#define pack(a,b) ((a)<<8 \| (b))
216	switch (pack(photometric, config)) {
217	case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_CONTIG):
218	case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_SEPARATE):
219	TIFFGetField(in, TIFFTAG_COLORMAP, &red, &green, &blue);
220	/*
221	* Convert 16-bit colormap to 8-bit (unless it looks
222	* like an old-style 8-bit colormap).
223	*/
224	if (checkcmap(in, 1<<bitspersample, red, green, blue) == 16) {
225	int i;
226	#define CVT(x) (((x) * 255L) / ((1L<<16)-1))
227	for (i = (1<<bitspersample)-1; i >= 0; i--) {
228	red[i] = CVT(red[i]);
229	green[i] = CVT(green[i]);
230	blue[i] = CVT(blue[i]);
231	}
232	#undef CVT
233	}
234	inbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(in));
235	for (row = 0; row < h; row++) {
236	if (TIFFReadScanline(in, inbuf, row, 0) < 0)
237	break;
238	compresspalette(outbuf, inbuf, w, red, green, blue);
239	if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
240	break;
241	}
242	break;
243	case pack(PHOTOMETRIC_RGB, PLANARCONFIG_CONTIG):
244	inbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(in));
245	for (row = 0; row < h; row++) {
246	if (TIFFReadScanline(in, inbuf, row, 0) < 0)
247	break;
248	compresscontig(outbuf, inbuf, w);
249	if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
250	break;
251	}
252	break;
253	case pack(PHOTOMETRIC_RGB, PLANARCONFIG_SEPARATE):
254	rowsize = TIFFScanlineSize(in);
255	inbuf = (unsigned char )_TIFFmalloc(3rowsize);
256	for (row = 0; row < h; row++) {
257	for (s = 0; s < 3; s++)
258	if (TIFFReadScanline(in,
259	inbuf+s*rowsize, row, s) < 0)
260	return (-1);
261	compresssep(outbuf,
262	inbuf, inbuf+rowsize, inbuf+2*rowsize, w);
263	if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
264	break;
265	}
266	break;
267	}
268	#undef pack
269	TIFFClose(out);
270	return (0);
271	}
272
273	static int
274	processCompressOptions(char* opt)
275	{
276	if (streq(opt, "none"))
277	compression = COMPRESSION_NONE;
278	else if (streq(opt, "packbits"))
279	compression = COMPRESSION_PACKBITS;
280	else if (strneq(opt, "jpeg", 4)) {
281	char* cp = strchr(opt, ':');
282
283	compression = COMPRESSION_JPEG;
284	while( cp )
285	{
286	if (isdigit((int)cp[1]))
287	quality = atoi(cp+1);
288	else if (cp[1] == 'r' )
289	jpegcolormode = JPEGCOLORMODE_RAW;
290	else
291	usage();
292
293	cp = strchr(cp+1,':');
294	}
295	} else if (strneq(opt, "lzw", 3)) {
296	char* cp = strchr(opt, ':');
297	if (cp)
298	predictor = atoi(cp+1);
299	compression = COMPRESSION_LZW;
300	} else if (strneq(opt, "zip", 3)) {
301	char* cp = strchr(opt, ':');
302	if (cp)
303	predictor = atoi(cp+1);
304	compression = COMPRESSION_DEFLATE;
305	} else
306	return (0);
307	return (1);
308	}
309
310	#define CopyField(tag, v) \
311	if (TIFFGetField(in, tag, &v)) TIFFSetField(out, tag, v)
312	#define CopyField2(tag, v1, v2) \
313	if (TIFFGetField(in, tag, &v1, &v2)) TIFFSetField(out, tag, v1, v2)
314	#define CopyField3(tag, v1, v2, v3) \
315	if (TIFFGetField(in, tag, &v1, &v2, &v3)) TIFFSetField(out, tag, v1, v2, v3)
316	#define CopyField4(tag, v1, v2, v3, v4) \
317	if (TIFFGetField(in, tag, &v1, &v2, &v3, &v4)) TIFFSetField(out, tag, v1, v2, v3, v4)
318
319	static void
320	cpTag(TIFF* in, TIFF* out, uint16 tag, uint16 count, TIFFDataType type)
321	{
322	switch (type) {
323	case TIFF_SHORT:
324	if (count == 1) {
325	uint16 shortv;
326	CopyField(tag, shortv);
327	} else if (count == 2) {
328	uint16 shortv1, shortv2;
329	CopyField2(tag, shortv1, shortv2);
330	} else if (count == 4) {
331	uint16 tr, tg, tb, ta;
332	CopyField4(tag, tr, tg, tb, ta);
333	} else if (count == (uint16) -1) {
334	uint16 shortv1;
335	uint16* shortav;
336	CopyField2(tag, shortv1, shortav);
337	}
338	break;
339	case TIFF_LONG:
340	{ uint32 longv;
341	CopyField(tag, longv);
342	}
343	break;
344	case TIFF_RATIONAL:
345	if (count == 1) {
346	float floatv;
347	CopyField(tag, floatv);
348	} else if (count == (uint16) -1) {
349	float* floatav;
350	CopyField(tag, floatav);
351	}
352	break;
353	case TIFF_ASCII:
354	{ char* stringv;
355	CopyField(tag, stringv);
356	}
357	break;
358	case TIFF_DOUBLE:
359	if (count == 1) {
360	double doublev;
361	CopyField(tag, doublev);
362	} else if (count == (uint16) -1) {
363	double* doubleav;
364	CopyField(tag, doubleav);
365	}
366	break;
367	default:
368	TIFFError(TIFFFileName(in),
369	"Data type %d is not supported, tag %d skipped.",
370	tag, type);
371	}
372	}
373
374	#undef CopyField4
375	#undef CopyField3
376	#undef CopyField2
377	#undef CopyField
378
379	static struct cpTag {
380	uint16 tag;
381	uint16 count;
382	TIFFDataType type;
383	} tags[] = {
384	{ TIFFTAG_SUBFILETYPE, 1, TIFF_LONG },
385	{ TIFFTAG_THRESHHOLDING, 1, TIFF_SHORT },
386	{ TIFFTAG_DOCUMENTNAME, 1, TIFF_ASCII },
387	{ TIFFTAG_IMAGEDESCRIPTION, 1, TIFF_ASCII },
388	{ TIFFTAG_MAKE, 1, TIFF_ASCII },
389	{ TIFFTAG_MODEL, 1, TIFF_ASCII },
390	{ TIFFTAG_MINSAMPLEVALUE, 1, TIFF_SHORT },
391	{ TIFFTAG_MAXSAMPLEVALUE, 1, TIFF_SHORT },
392	{ TIFFTAG_XRESOLUTION, 1, TIFF_RATIONAL },
393	{ TIFFTAG_YRESOLUTION, 1, TIFF_RATIONAL },
394	{ TIFFTAG_PAGENAME, 1, TIFF_ASCII },
395	{ TIFFTAG_XPOSITION, 1, TIFF_RATIONAL },
396	{ TIFFTAG_YPOSITION, 1, TIFF_RATIONAL },
397	{ TIFFTAG_RESOLUTIONUNIT, 1, TIFF_SHORT },
398	{ TIFFTAG_SOFTWARE, 1, TIFF_ASCII },
399	{ TIFFTAG_DATETIME, 1, TIFF_ASCII },
400	{ TIFFTAG_ARTIST, 1, TIFF_ASCII },
401	{ TIFFTAG_HOSTCOMPUTER, 1, TIFF_ASCII },
80ed523f	402	{ TIFFTAG_WHITEPOINT, 2, TIFF_RATIONAL },
8414a40c VZ	403	{ TIFFTAG_PRIMARYCHROMATICITIES,(uint16) -1,TIFF_RATIONAL },
	404	{ TIFFTAG_HALFTONEHINTS, 2, TIFF_SHORT },
	405	{ TIFFTAG_INKSET, 1, TIFF_SHORT },
	406	{ TIFFTAG_DOTRANGE, 2, TIFF_SHORT },
	407	{ TIFFTAG_TARGETPRINTER, 1, TIFF_ASCII },
	408	{ TIFFTAG_SAMPLEFORMAT, 1, TIFF_SHORT },
	409	{ TIFFTAG_YCBCRCOEFFICIENTS, (uint16) -1,TIFF_RATIONAL },
	410	{ TIFFTAG_YCBCRSUBSAMPLING, 2, TIFF_SHORT },
	411	{ TIFFTAG_YCBCRPOSITIONING, 1, TIFF_SHORT },
	412	{ TIFFTAG_REFERENCEBLACKWHITE, (uint16) -1,TIFF_RATIONAL },
	413	{ TIFFTAG_EXTRASAMPLES, (uint16) -1, TIFF_SHORT },
	414	{ TIFFTAG_SMINSAMPLEVALUE, 1, TIFF_DOUBLE },
	415	{ TIFFTAG_SMAXSAMPLEVALUE, 1, TIFF_DOUBLE },
	416	{ TIFFTAG_STONITS, 1, TIFF_DOUBLE },
	417	};
	418	#define NTAGS (sizeof (tags) / sizeof (tags[0]))
	419
	420	static void
	421	cpTags(TIFF* in, TIFF* out)
	422	{
	423	struct cpTag *p;
	424	for (p = tags; p < &tags[NTAGS]; p++)
	425	cpTag(in, out, p->tag, p->count, p->type);
	426	}
	427	#undef NTAGS
	428
	429	char* stuff[] = {
	430	"usage: tiff2bw [options] input.tif output.tif",
	431	"where options are:",
	432	" -R % use #% from red channel",
	433	" -G % use #% from green channel",
	434	" -B % use #% from blue channel",
	435	"",
	436	" -r # make each strip have no more than # rows",
	437	"",
	438	" -c lzw[:opts] compress output with Lempel-Ziv & Welch encoding",
	439	" -c zip[:opts] compress output with deflate encoding",
	440	" -c packbits compress output with packbits encoding",
	441	" -c g3[:opts] compress output with CCITT Group 3 encoding",
	442	" -c g4 compress output with CCITT Group 4 encoding",
	443	" -c none use no compression algorithm on output",
	444	"",
	445	"LZW and deflate options:",
	446	" # set predictor value",
	447	"For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
	448	NULL
	449	};
	450
	451	static void
	452	usage(void)
	453	{
	454	char buf[BUFSIZ];
	455	int i;
	456
	457	setbuf(stderr, buf);
	458	fprintf(stderr, "%s\n\n", TIFFGetVersion());
	459	for (i = 0; stuff[i] != NULL; i++)
	460	fprintf(stderr, "%s\n", stuff[i]);
	461	exit(-1);
	462	}
	463
	464	/* vim: set ts=8 sts=8 sw=8 noet: */
80ed523f VZ	465	/*
	466	* Local Variables:
	467	* mode: c
	468	* c-basic-offset: 8
	469	* fill-column: 78
	470	* End:
	471	*/