/* $Id: tiff2bw.c,v 1.21 2017-11-01 13:41:58 bfriesen Exp $ */
/*
* 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)*256+50)/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;
#if !HAVE_DECL_OPTARG
extern int optind;
extern char *optarg;
#endif
in = (TIFF *) NULL;
out = (TIFF *) NULL;
inbuf = (unsigned char *) NULL;
outbuf = (unsigned char *) NULL;
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]);
goto tiff2bw_error;
}
TIFFGetField(in, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel);
if (samplesperpixel != 1 && samplesperpixel != 3) {
fprintf(stderr, "%s: Bad samples/pixel %u.\n",
argv[optind], samplesperpixel);
goto tiff2bw_error;
}
if( photometric == PHOTOMETRIC_RGB && samplesperpixel != 3) {
fprintf(stderr, "%s: Bad samples/pixel %u for PHOTOMETRIC_RGB.\n",
argv[optind], samplesperpixel);
goto tiff2bw_error;
}
TIFFGetField(in, TIFFTAG_BITSPERSAMPLE, &bitspersample);
if (bitspersample != 8) {
fprintf(stderr,
" %s: Sorry, only handle 8-bit samples.\n", argv[optind]);
goto tiff2bw_error;
}
TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(in, TIFFTAG_IMAGELENGTH, &h);
TIFFGetField(in, TIFFTAG_PLANARCONFIG, &config);
out = TIFFOpen(argv[optind+1], "w");
if (out == NULL)
{
goto tiff2bw_error;
}
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);
snprintf(thing, sizeof(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)
goto tiff2bw_error;
compresssep(outbuf,
inbuf, inbuf+rowsize, inbuf+2*rowsize, w);
if (TIFFWriteScanline(out, outbuf, row, 0) < 0)
break;
}
break;
}
#undef pack
if (inbuf)
_TIFFfree(inbuf);
if (outbuf)
_TIFFfree(outbuf);
TIFFClose(in);
TIFFClose(out);
return (0);
tiff2bw_error:
if (inbuf)
_TIFFfree(inbuf);
if (outbuf)
_TIFFfree(outbuf);
if (out)
TIFFClose(out);
if (in)
TIFFClose(in);
return (-1);
}
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:
*/