659 lines
17 KiB
C
659 lines
17 KiB
C
/* $Id: thumbnail.c,v 1.16 2010-07-02 12:02:56 dron 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
|
|
|
|
#ifdef NEED_LIBPORT
|
|
# include "libport.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");
|
|
if( in == NULL )
|
|
return 2;
|
|
|
|
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_LONG8:
|
|
{ uint64 longv8;
|
|
CopyField(tag, longv8);
|
|
}
|
|
break;
|
|
case TIFF_SLONG8:
|
|
{ int64 longv8;
|
|
CopyField(tag, longv8);
|
|
}
|
|
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;
|
|
case TIFF_IFD8:
|
|
{ toff_t ifd8;
|
|
CopyField(tag, ifd8);
|
|
}
|
|
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, 2, 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);
|
|
uint64 *bytecounts;
|
|
|
|
TIFFGetField(in, TIFFTAG_STRIPBYTECOUNTS, &bytecounts);
|
|
for (s = 0; s < ns; s++) {
|
|
if (bytecounts[s] > (uint64) bufsize) {
|
|
buf = (unsigned char *)_TIFFrealloc(buf, (tmsize_t)bytecounts[s]);
|
|
if (!buf)
|
|
goto bad;
|
|
bufsize = (tmsize_t)bytecounts[s];
|
|
}
|
|
if (TIFFReadRawStrip(in, s, buf, (tmsize_t)bytecounts[s]) < 0 ||
|
|
TIFFWriteRawStrip(out, s, buf, (tmsize_t)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);
|
|
uint64 *bytecounts;
|
|
|
|
TIFFGetField(in, TIFFTAG_TILEBYTECOUNTS, &bytecounts);
|
|
for (t = 0; t < nt; t++) {
|
|
if (bytecounts[t] > (uint64) bufsize) {
|
|
buf = (unsigned char *)_TIFFrealloc(buf, (tmsize_t)bytecounts[t]);
|
|
if (!buf)
|
|
goto bad;
|
|
bufsize = (tmsize_t)bytecounts[t];
|
|
}
|
|
if (TIFFReadRawTile(in, t, buf, (tmsize_t)bytecounts[t]) < 0 ||
|
|
TIFFWriteRawTile(out, t, buf, (tmsize_t)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);
|
|
toff_t 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] = 0UL;
|
|
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:
|
|
*/
|