d21d2b3057
definitions that configure produces, including for WIN64. Still needs to be tested. 'lld' is not assured by the run-time DLLs and so GCC warns. Add TIFF_SIZE_T and TIFF_SIZE_FORMAT to provide a type definition and printf format specifier to deal with printing values of 'size_t' type. In particular, this was necessary for WIN64. Added a configure test for if the system headers provide 'optarg' (normal case) and block out the many explicit 'extern' statements in the utilities. This was found to be necessary under Windows when getopt is in a DLL and the symbols are already imported with dllimport via standard header files.
692 lines
18 KiB
C
692 lines
18 KiB
C
/* $Id: thumbnail.c,v 1.21 2015-06-21 01:09:10 bfriesen 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);
|
|
|
|
#if !HAVE_DECL_OPTARG
|
|
extern char* optarg;
|
|
extern int optind;
|
|
#endif
|
|
|
|
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 },*/ /* Needs much more complicated logic. See tiffcp */
|
|
{ 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++)
|
|
{
|
|
/* Horrible: but TIFFGetField() expects 2 arguments to be passed */
|
|
/* if we request a tag that is defined in a codec, but that codec */
|
|
/* isn't used */
|
|
if( p->tag == TIFFTAG_GROUP3OPTIONS )
|
|
{
|
|
uint16 compression;
|
|
if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
|
|
compression != COMPRESSION_CCITTFAX3 )
|
|
continue;
|
|
}
|
|
if( p->tag == TIFFTAG_GROUP4OPTIONS )
|
|
{
|
|
uint16 compression;
|
|
if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
|
|
compression != COMPRESSION_CCITTFAX4 )
|
|
continue;
|
|
}
|
|
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)
|
|
{
|
|
/* We should perhaps error loudly, but I can't make sense of that */
|
|
/* code... */
|
|
if( nrows == 256 )
|
|
break;
|
|
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);
|
|
/* +3 : add a few guard bytes since setrow() can read a bit */
|
|
/* outside buffer */
|
|
raster = (unsigned char*)_TIFFmalloc(rastersize+3);
|
|
if (!raster) {
|
|
TIFFError(TIFFFileName(in),
|
|
"Can't allocate space for raster buffer.");
|
|
return 0;
|
|
}
|
|
raster[rastersize] = 0;
|
|
raster[rastersize+1] = 0;
|
|
raster[rastersize+2] = 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:
|
|
*/
|