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xvtiff.c
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xvtiff.c
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/*
* xvtiff.c - load routine for 'TIFF' format pictures
*
* LoadTIFF(fname, numcols, quick) - load a TIFF file
*/
#ifndef va_start
# define NEEDSARGS
#endif
#include "xv.h"
#ifdef HAVE_TIFF
#include "tiffio.h" /* has to be after xv.h, as it needs varargs/stdarg */
/* Portions fall under the following copyright:
*
* Copyright (c) 1992, 1993, 1994 Sam Leffler
* Copyright (c) 1992, 1993, 1994 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.
*/
static int copyTiff PARM((TIFF *, char *));
static int cpStrips PARM((TIFF *, TIFF *));
static int cpTiles PARM((TIFF *, TIFF *));
static byte *loadPalette PARM((TIFF *, uint32, uint32, int, int, PICINFO *));
static byte *loadColor PARM((TIFF *, uint32, uint32, int, int, PICINFO *));
static int loadImage PARM((TIFF *, uint32, uint32, byte *, int));
static void _TIFFerr PARM((const char *, const char *, va_list));
static void _TIFFwarn PARM((const char *, const char *, va_list));
static long filesize;
static byte *rmap, *gmap, *bmap;
static const char *filename;
static int error_occurred;
/*******************************************/
int LoadTIFF(fname, pinfo, quick)
char *fname;
PICINFO *pinfo;
int quick;
/*******************************************/
{
/* returns '1' on success, '0' on failure */
TIFF *tif;
uint32 w, h;
float xres, yres;
short bps, spp, photo, orient;
FILE *fp;
byte *pic8;
char *desc, oldpath[MAXPATHLEN+1], tmppath[MAXPATHLEN+1], *sp;
char tmp[256], tmpname[256];
int i, nump;
error_occurred = 0;
pinfo->type = PIC8;
TIFFSetErrorHandler(_TIFFerr);
TIFFSetWarningHandler(_TIFFwarn);
/* open the stream to find out filesize (for info box) */
fp = fopen(fname,"r");
if (!fp) {
TIFFError("LoadTIFF()", "couldn't open file");
return 0;
}
fseek(fp, 0L, 2);
filesize = ftell(fp);
fclose(fp);
rmap = pinfo->r; gmap = pinfo->g; bmap = pinfo->b;
/* a kludge: temporarily cd to the directory that the file is in (if
the file has a path), and cd back when done, as I can't make the
various TIFF error messages print the simple filename */
filename = fname; /* use fullname unless it all works out */
oldpath[0] = '\0';
if (fname[0] == '/') {
xv_getwd(oldpath, sizeof(oldpath));
strcpy(tmppath, fname);
sp = (char *) BaseName(tmppath); /* intentionally losing constness */
if (sp != tmppath) {
sp[-1] = '\0'; /* truncate before last '/' char */
if (chdir(tmppath)) {
oldpath[0] = '\0';
}
else filename = BaseName(fname);
}
}
nump = 1;
if (!quick) {
/* see if there's more than 1 image in tiff file, to determine if we
should do multi-page thing... */
tif = TIFFOpen(filename, "r");
if (!tif) return 0;
while (TIFFReadDirectory(tif)) ++nump;
TIFFClose(tif);
if (DEBUG)
fprintf(stderr,"LoadTIFF: %d page%s found\n", nump, nump==1 ? "" : "s");
/* if there are multiple images, copy them out to multiple tmp files,
and load the first one... */
if (nump>1) {
TIFF *in;
/* GRR 20050320: converted this fake mktemp() to use mktemp()/mkstemp()
internally (formerly it simply prepended tmpdir to the string and
returned immediately) */
xv_mktemp(tmpname, "xvpgXXXXXX");
if (tmpname[0] == '\0') { /* mktemp() or mkstemp() blew up */
sprintf(dummystr,"LoadTIFF: Unable to create temporary filename???");
ErrPopUp(dummystr, "\nHow unlikely!");
return 0;
}
/* GRR 20070506: could clean up unappended tmpname-file here (Linux
bug?), but "cleaner" (more general) to do so in KillPageFiles() */
in = TIFFOpen(filename, "r");
if (!in) return 0;
for (i=1; i<=nump; i++) {
sprintf(tmp, "%s%d", tmpname, i);
if (!copyTiff(in, tmp)) {
SetISTR(ISTR_WARNING, "LoadTIFF: Error writing page files!");
break;
}
if (!TIFFReadDirectory(in)) break;
}
TIFFClose(in);
if (DEBUG)
fprintf(stderr,"LoadTIFF: %d page%s written\n",
i-1, (i-1)==1 ? "" : "s");
sprintf(tmp, "%s%d", tmpname, 1); /* start with page #1 */
filename = tmp;
}
} /* if (!quick) ... */
tif = TIFFOpen(filename, "r");
if (!tif) return 0;
/* flip orientation so that image comes in X order */
TIFFGetFieldDefaulted(tif, TIFFTAG_ORIENTATION, &orient);
switch (orient) {
case ORIENTATION_TOPLEFT:
case ORIENTATION_TOPRIGHT:
case ORIENTATION_LEFTTOP:
case ORIENTATION_RIGHTTOP: orient = ORIENTATION_BOTLEFT; break;
case ORIENTATION_BOTRIGHT:
case ORIENTATION_BOTLEFT:
case ORIENTATION_RIGHTBOT:
case ORIENTATION_LEFTBOT: orient = ORIENTATION_TOPLEFT; break;
}
TIFFSetField(tif, TIFFTAG_ORIENTATION, orient);
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h);
TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bps);
TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photo);
TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &spp);
if ((TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres) == 1) &&
(TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres) == 1)) {
normaspect = yres / xres;
if (DEBUG) fprintf(stderr,"TIFF aspect = %f\n", normaspect);
}
if (spp == 1) {
pic8 = loadPalette(tif, w, h, photo, bps, pinfo);
} else {
pic8 = loadColor(tif, w, h, photo, bps, pinfo);
}
/* try to get comments, if any */
pinfo->comment = (char *) NULL;
desc = (char *) NULL;
TIFFGetField(tif, TIFFTAG_IMAGEDESCRIPTION, &desc);
if (desc && strlen(desc) > (size_t) 0) {
/* kludge: tiff library seems to return bizarre comments */
if (strlen(desc)==4 && strcmp(desc, "\367\377\353\370")==0) {}
else {
pinfo->comment = (char *) malloc(strlen(desc) + 1);
if (pinfo->comment) strcpy(pinfo->comment, desc);
}
}
TIFFClose(tif);
/* un-kludge */
if (oldpath[0] != '\0') chdir(oldpath);
if (error_occurred) {
if (pic8) free(pic8);
if (pinfo->comment) free(pinfo->comment);
pinfo->comment = (char *) NULL;
if (!quick && nump>1) KillPageFiles(tmpname, nump);
SetCursors(-1);
return 0;
}
pinfo->pic = pic8;
pinfo->w = w; pinfo->h = h;
pinfo->normw = pinfo->w; pinfo->normh = pinfo->h;
pinfo->frmType = F_TIFF;
if (nump>1) strcpy(pinfo->pagebname, tmpname);
pinfo->numpages = nump;
if (pinfo->pic) return 1;
/* failed. if we malloc'd a comment, free it */
if (pinfo->comment) free(pinfo->comment);
pinfo->comment = (char *) NULL;
if (!quick && nump>1) KillPageFiles(tmpname, nump);
SetCursors(-1);
return 0;
}
/*******************************************/
#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)
/*******************************************/
static int copyTiff(in, fname)
TIFF *in;
char *fname;
{
/* copies tiff (sub)image to given filename. (Used only for multipage
images.) Returns 0 on error */
TIFF *out;
short bitspersample, samplesperpixel, shortv, *shortav;
uint32 w, l;
float floatv, *floatav;
char *stringv;
uint32 longv;
uint16 *red, *green, *blue, shortv2;
int rv;
out = TIFFOpen(fname, "w");
if (!out) return 0;
if (TIFFGetField(in, TIFFTAG_COMPRESSION, &shortv)){
/* Currently, the TIFF Library cannot correctly copy TIFF version 6.0 (or
* earlier) files that use "old" JPEG compression, so don't even try. */
if (shortv == COMPRESSION_OJPEG) return 0;
TIFFSetField(out, TIFFTAG_COMPRESSION, shortv);
}
CopyField (TIFFTAG_SUBFILETYPE, longv);
CopyField (TIFFTAG_TILEWIDTH, w);
CopyField (TIFFTAG_TILELENGTH, l);
CopyField (TIFFTAG_IMAGEWIDTH, w);
CopyField (TIFFTAG_IMAGELENGTH, l);
CopyField (TIFFTAG_BITSPERSAMPLE, bitspersample);
CopyField (TIFFTAG_PREDICTOR, shortv);
CopyField (TIFFTAG_PHOTOMETRIC, shortv);
CopyField (TIFFTAG_THRESHHOLDING, shortv);
CopyField (TIFFTAG_FILLORDER, shortv);
CopyField (TIFFTAG_ORIENTATION, shortv);
CopyField (TIFFTAG_SAMPLESPERPIXEL, samplesperpixel);
CopyField (TIFFTAG_MINSAMPLEVALUE, shortv);
CopyField (TIFFTAG_MAXSAMPLEVALUE, shortv);
CopyField (TIFFTAG_XRESOLUTION, floatv);
CopyField (TIFFTAG_YRESOLUTION, floatv);
CopyField (TIFFTAG_GROUP3OPTIONS, longv);
CopyField (TIFFTAG_GROUP4OPTIONS, longv);
CopyField (TIFFTAG_RESOLUTIONUNIT, shortv);
CopyField (TIFFTAG_PLANARCONFIG, shortv);
CopyField (TIFFTAG_ROWSPERSTRIP, longv);
CopyField (TIFFTAG_XPOSITION, floatv);
CopyField (TIFFTAG_YPOSITION, floatv);
CopyField (TIFFTAG_IMAGEDEPTH, longv);
CopyField (TIFFTAG_TILEDEPTH, longv);
CopyField2(TIFFTAG_EXTRASAMPLES, shortv, shortav);
CopyField3(TIFFTAG_COLORMAP, red, green, blue);
CopyField2(TIFFTAG_PAGENUMBER, shortv, shortv2);
CopyField (TIFFTAG_ARTIST, stringv);
CopyField (TIFFTAG_IMAGEDESCRIPTION, stringv);
CopyField (TIFFTAG_MAKE, stringv);
CopyField (TIFFTAG_MODEL, stringv);
CopyField (TIFFTAG_SOFTWARE, stringv);
CopyField (TIFFTAG_DATETIME, stringv);
CopyField (TIFFTAG_HOSTCOMPUTER, stringv);
CopyField (TIFFTAG_PAGENAME, stringv);
CopyField (TIFFTAG_DOCUMENTNAME, stringv);
CopyField2(TIFFTAG_JPEGTABLES, longv, stringv);
CopyField (TIFFTAG_YCBCRCOEFFICIENTS, floatav);
CopyField2(TIFFTAG_YCBCRSUBSAMPLING, shortv,shortv2);
CopyField (TIFFTAG_YCBCRPOSITIONING, shortv);
CopyField (TIFFTAG_REFERENCEBLACKWHITE, floatav);
if (TIFFIsTiled(in)) rv = cpTiles (in, out);
else rv = cpStrips(in, out);
TIFFClose(out);
return rv;
}
/*******************************************/
static int cpStrips(in, out)
TIFF *in, *out;
{
tsize_t bufsize;
byte *buf;
bufsize = TIFFStripSize(in);
if (bufsize <= 0) return 0; /* tsize_t is signed */
buf = (byte *) malloc((size_t) bufsize);
if (buf) {
tstrip_t s, ns = TIFFNumberOfStrips(in);
uint32 *bytecounts;
TIFFGetField(in, TIFFTAG_STRIPBYTECOUNTS, &bytecounts);
for (s = 0; s < ns; s++) {
if (bytecounts[s] > bufsize) {
buf = (unsigned char *) realloc(buf, (size_t) bytecounts[s]);
if (!buf) return (0);
bufsize = bytecounts[s];
}
if (TIFFReadRawStrip (in, s, buf, (tsize_t) bytecounts[s]) < 0 ||
TIFFWriteRawStrip(out, s, buf, (tsize_t) bytecounts[s]) < 0) {
free(buf);
return 0;
}
}
free(buf);
return 1;
}
return 0;
}
/*******************************/
static int cpTiles(in, out)
TIFF *in, *out;
{
tsize_t bufsize;
byte *buf;
bufsize = TIFFTileSize(in);
if (bufsize <= 0) return 0; /* tsize_t is signed */
buf = (unsigned char *) malloc((size_t) bufsize);
if (buf) {
ttile_t t, nt = TIFFNumberOfTiles(in);
uint32 *bytecounts;
TIFFGetField(in, TIFFTAG_TILEBYTECOUNTS, &bytecounts);
for (t = 0; t < nt; t++) {
if (bytecounts[t] > bufsize) {
buf = (unsigned char *)realloc(buf, (size_t) bytecounts[t]);
if (!buf) return (0);
bufsize = bytecounts[t];
}
if (TIFFReadRawTile (in, t, buf, (tsize_t) bytecounts[t]) < 0 ||
TIFFWriteRawTile(out, t, buf, (tsize_t) bytecounts[t]) < 0) {
free(buf);
return 0;
}
}
free(buf);
return 1;
}
return 0;
}
/*******************************************/
static byte *loadPalette(tif, w, h, photo, bps, pinfo)
TIFF *tif;
uint32 w,h;
int photo,bps;
PICINFO *pinfo;
{
byte *pic8;
uint32 npixels;
switch (photo) {
case PHOTOMETRIC_PALETTE:
pinfo->colType = F_FULLCOLOR;
sprintf(pinfo->fullInfo, "TIFF, %u-bit, palette format. (%ld bytes)",
bps, filesize);
break;
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
pinfo->colType = (bps==1) ? F_BWDITHER : F_GREYSCALE;
sprintf(pinfo->fullInfo,"TIFF, %u-bit, %s format. (%ld bytes)",
bps,
photo == PHOTOMETRIC_MINISWHITE ? "min-is-white" :
"min-is-black",
filesize);
break;
}
sprintf(pinfo->shrtInfo, "%ux%u TIFF.",(u_int) w, (u_int) h);
npixels = w*h;
if (npixels/w != h) {
/* SetISTR(ISTR_WARNING, "loadPalette() - image dimensions too large"); */
TIFFError(filename, "Image dimensions too large");
return (byte *) NULL;
}
pic8 = (byte *) malloc((size_t) npixels);
if (!pic8) FatalError("loadPalette() - couldn't malloc 'pic8'");
if (loadImage(tif, w, h, pic8, 0)) return pic8;
return (byte *) NULL;
}
/*******************************************/
static byte *loadColor(tif, w, h, photo, bps, pinfo)
TIFF *tif;
uint32 w,h;
int photo,bps;
PICINFO *pinfo;
{
byte *pic24, *pic8;
uint32 npixels, count;
pinfo->colType = F_FULLCOLOR;
sprintf(pinfo->fullInfo, "TIFF, %u-bit, %s format. (%ld bytes)",
bps,
(photo == PHOTOMETRIC_RGB ? "RGB" :
photo == PHOTOMETRIC_YCBCR ? "YCbCr" :
"???"),
filesize);
sprintf(pinfo->shrtInfo, "%ux%u TIFF.",(u_int) w, (u_int) h);
npixels = w*h;
count = 3*npixels;
if (npixels/w != h || count/3 != npixels) {
/* SetISTR(ISTR_WARNING, "loadPalette() - image dimensions too large"); */
TIFFError(filename, "Image dimensions too large");
return (byte *) NULL;
}
/* allocate 24-bit image */
pic24 = (byte *) malloc((size_t) count);
if (!pic24) FatalError("loadColor() - couldn't malloc 'pic24'");
pic8 = (byte *) NULL;
if (loadImage(tif, w, h, pic24, 0)) {
pinfo->type = PIC24;
pic8 = pic24;
}
else free(pic24);
return pic8;
}
/*******************************************/
static void _TIFFerr(module, fmt, ap)
const char *module;
const char *fmt;
va_list ap;
{
char buf[2048];
char *cp = buf;
if (module != NULL) {
sprintf(cp, "%s: ", module);
cp = (char *) index(cp, '\0');
}
vsprintf(cp, fmt, ap);
strcat(cp, ".");
SetISTR(ISTR_WARNING, "%s", buf);
error_occurred = 1;
}
/*******************************************/
static void _TIFFwarn(module, fmt, ap)
const char *module;
const char *fmt;
va_list ap;
{
char buf[2048];
char *cp = buf;
if (module != NULL) {
sprintf(cp, "%s: ", module);
cp = (char *) index(cp, '\0');
}
strcpy(cp, "Warning, ");
cp = (char *) index(cp, '\0');
vsprintf(cp, fmt, ap);
strcat(cp, ".");
SetISTR(ISTR_WARNING, "%s", buf);
}
typedef byte RGBvalue;
static u_short bitspersample;
static u_short samplesperpixel;
static u_short photometric;
static u_short orientation;
/* colormap for pallete images */
static u_short *redcmap, *greencmap, *bluecmap;
static int stoponerr; /* stop on read error */
/* YCbCr support */
static u_short YCbCrHorizSampling;
static u_short YCbCrVertSampling;
static float *YCbCrCoeffs;
static float *refBlackWhite;
static byte **BWmap;
static byte **PALmap;
/* XXX Work around some collisions with the new library. */
#define tileContigRoutine _tileContigRoutine
#define tileSeparateRoutine _tileSeparateRoutine
typedef void (*tileContigRoutine) PARM((byte*, u_char*, RGBvalue*,
uint32, uint32, int, int));
typedef void (*tileSeparateRoutine) PARM((byte*, u_char*, u_char*, u_char*,
RGBvalue*, uint32, uint32, int, int));
static int checkcmap PARM((int, u_short*, u_short*, u_short*));
static int gt PARM((TIFF *, uint32, uint32, byte *));
static uint32 setorientation PARM((TIFF *, uint32));
static int gtTileContig PARM((TIFF *, byte *, RGBvalue *,
uint32, uint32, int));
static int gtTileSeparate PARM((TIFF *, byte *, RGBvalue *,
uint32, uint32, int));
static int gtStripContig PARM((TIFF *, byte *, RGBvalue *,
uint32, uint32, int));
static int gtStripSeparate PARM((TIFF *, byte *, RGBvalue *,
uint32, uint32, int));
static int makebwmap PARM((void));
static int makecmap PARM((void));
static void put8bitcmaptile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void put4bitcmaptile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void put2bitcmaptile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void put1bitcmaptile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void putgreytile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void put1bitbwtile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void put2bitbwtile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void put4bitbwtile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void put16bitbwtile PARM((byte *, u_short *, RGBvalue *,
uint32, uint32, int, int));
static void putRGBcontig8bittile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void putRGBcontig16bittile PARM((byte *, u_short *, RGBvalue *,
uint32, uint32, int, int));
static void putRGBseparate8bittile PARM((byte *, u_char *, u_char *,
u_char *, RGBvalue *,
uint32, uint32, int, int));
static void putRGBseparate16bittile PARM((byte *, u_short *, u_short *,
u_short *, RGBvalue *,
uint32, uint32, int, int));
static void initYCbCrConversion PARM((void));
static void putRGBContigYCbCrClump PARM((byte *, u_char *, int, int,
uint32, int, int, int));
static void putRGBSeparateYCbCrClump PARM((byte *, u_char *, u_char *,
u_char *, int, int, uint32, int,
int, int));
static void putRGBSeparate16bitYCbCrClump PARM((byte *, u_short *, u_short *,
u_short *, int, int, uint32,
int, int, int));
static void putcontig8bitYCbCrtile PARM((byte *, u_char *, RGBvalue *,
uint32, uint32, int, int));
static void putYCbCrseparate8bittile PARM((byte *, u_char *, u_char *,
u_char *, RGBvalue *,
uint32, uint32, int, int));
static void putYCbCrseparate16bittile PARM((byte *, u_short *, u_short *,
u_short *, RGBvalue *,
uint32, uint32, int, int));
static tileContigRoutine pickTileContigCase PARM((RGBvalue *));
static tileSeparateRoutine pickTileSeparateCase PARM((RGBvalue *));
/*******************************************/
static int loadImage(tif, rwidth, rheight, raster, stop)
TIFF *tif;
uint32 rwidth, rheight;
byte *raster;
int stop;
{
int ok;
uint32 width, height;
TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bitspersample);
switch (bitspersample) {
case 1:
case 2:
case 4:
case 8:
case 16: break;
default:
TIFFError(TIFFFileName(tif),
"Sorry, cannot handle %d-bit pictures", bitspersample);
return (0);
}
TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel);
switch (samplesperpixel) {
case 1:
case 3:
case 4: break;
default:
TIFFError(TIFFFileName(tif),
"Sorry, cannot handle %d-channel images", samplesperpixel);
return (0);
}
if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric)) {
switch (samplesperpixel) {
case 1: photometric = PHOTOMETRIC_MINISBLACK; break;
case 3:
case 4: photometric = PHOTOMETRIC_RGB; break;
default:
TIFFError(TIFFFileName(tif),
"Missing needed \"PhotometricInterpretation\" tag");
return (0);
}
TIFFWarning(TIFFFileName(tif),
"No \"PhotometricInterpretation\" tag, assuming %s\n",
photometric == PHOTOMETRIC_RGB ? "RGB" : "min-is-black");
}
/* XXX maybe should check photometric? */
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);
/* XXX verify rwidth and rheight against width and height */
stoponerr = stop;
BWmap = NULL;
PALmap = NULL;
ok = gt(tif, rwidth, height, raster + (rheight-height)*rwidth);
if (BWmap)
free((char *)BWmap);
if (PALmap)
free((char *)PALmap);
return (ok);
}
/*******************************************/
static int checkcmap(n, r, g, b)
int n;
u_short *r, *g, *b;
{
while (n-- >= 0)
if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256) return (16);
TIFFWarning(filename, "Assuming 8-bit colormap");
return (8);
}
/*******************************************/
static int gt(tif, w, h, raster)
TIFF *tif;
uint32 w, h;
byte *raster;
{
#ifdef USE_LIBJPEG_FOR_TIFF_YCbCr_RGB_CONVERSION
u_short compression;
#endif
u_short minsamplevalue, maxsamplevalue, planarconfig;
RGBvalue *Map;
int bpp = 1, e;
int x, range;
#ifdef USE_LIBJPEG_FOR_TIFF_YCbCr_RGB_CONVERSION
TIFFGetField(tif, TIFFTAG_COMPRESSION, &compression);
#endif
TIFFGetField(tif, TIFFTAG_PLANARCONFIG, &planarconfig);
TIFFGetFieldDefaulted(tif, TIFFTAG_MINSAMPLEVALUE, &minsamplevalue);
TIFFGetFieldDefaulted(tif, TIFFTAG_MAXSAMPLEVALUE, &maxsamplevalue);
Map = NULL;
switch (photometric) {
case PHOTOMETRIC_YCBCR:
#ifdef USE_LIBJPEG_FOR_TIFF_YCbCr_RGB_CONVERSION
if (compression == COMPRESSION_JPEG
#ifdef LIBTIFF_HAS_OLDJPEG_SUPPORT
|| compression == COMPRESSION_OJPEG
#endif
) {
/* FIXME: Remove the following test as soon as TIFF Library is fixed!
* (Currently [June 2002] this requires supporting patches in both
* tif_ojpeg.c and tif_jpeg.c in order to support subsampled YCbCr
* images having separated color planes.) */
if (planarconfig == PLANARCONFIG_CONTIG) {
/* can rely on libjpeg to convert to RGB (assuming newer libtiff,
* compiled with appropriate forms of JPEG support) */
TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB);
photometric = PHOTOMETRIC_RGB;
} else {
TIFFError(filename, "Cannot handle format");
return (0);
}
} else
#endif // USE_LIBJPEG_FOR_TIFF_YCbCr_RGB_CONVERSION
{
TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRCOEFFICIENTS, &YCbCrCoeffs);
TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING,
&YCbCrHorizSampling, &YCbCrVertSampling);
/* According to the TIFF specification, if no "ReferenceBlackWhite"
* tag is present in the input file, "TIFFGetFieldDefaulted()" returns
* default reference black and white levels suitable for PHOTOMETRIC_RGB;
* namely: <0,255,0,255,0,255>. But for PHOTOMETRIC_YCBCR in JPEG
* images, the usual default (e.g., corresponding to the behavior of the
* IJG libjpeg) is: <0,255,128,255,128,255>. Since libtiff doesn't have
* a clean, standard interface for making this repair, the following
* slightly dirty code installs the default. --Scott Marovich,
* Hewlett-Packard Labs, 9/2001.
*/
if (!TIFFGetField(tif, TIFFTAG_REFERENCEBLACKWHITE, &refBlackWhite)) {
TIFFGetFieldDefaulted(tif, TIFFTAG_REFERENCEBLACKWHITE, &refBlackWhite);
refBlackWhite[4] = refBlackWhite[2] = 1 << (bitspersample - 1);
}
TIFFGetFieldDefaulted(tif, TIFFTAG_REFERENCEBLACKWHITE, &refBlackWhite);
initYCbCrConversion();
}
/* fall thru... */
case PHOTOMETRIC_RGB:
bpp *= 3;
if (minsamplevalue == 0 && maxsamplevalue == 255)
break;
/* fall thru... */
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_MINISWHITE:
range = maxsamplevalue - minsamplevalue;
Map = (RGBvalue *)malloc((range + 1) * sizeof (RGBvalue));
if (Map == NULL) {
TIFFError(filename, "No space for photometric conversion table");
return (0);
}
if (photometric == PHOTOMETRIC_MINISWHITE) {
for (x = 0; x <= range; x++)
Map[x] = (255*(range-x))/range;
} else {
for (x = 0; x <= range; x++)
Map[x] = (255*x)/range;
}
if (range<256) {
for (x=0; x<=range; x++) rmap[x] = gmap[x] = bmap[x] = Map[x];
} else {
for (x=0; x<256; x++)
rmap[x] = gmap[x] = bmap[x] = Map[(range*x)/255];
}
if (photometric != PHOTOMETRIC_RGB && bitspersample <= 8) {
/*
* Use photometric mapping table to construct
* unpacking tables for samples <= 8 bits.
*/
if (!makebwmap())
return (0);
/* no longer need Map, free it */
free((char *)Map);
Map = NULL;
}
break;
case PHOTOMETRIC_PALETTE:
if (!TIFFGetField(tif, TIFFTAG_COLORMAP,
&redcmap, &greencmap, &bluecmap)) {
TIFFError(filename, "Missing required \"Colormap\" tag");
return (0);
}
/*
* Convert 16-bit colormap to 8-bit (unless it looks
* like an old-style 8-bit colormap).
*/
range = (1<<bitspersample)-1;
if (checkcmap(range, redcmap, greencmap, bluecmap) == 16) {
#define CVT(x) ((((int) x) * 255) / ((1L<<16)-1))
for (x = range; x >= 0; x--) {
rmap[x] = CVT(redcmap[x]);
gmap[x] = CVT(greencmap[x]);
bmap[x] = CVT(bluecmap[x]);
}
} else {
for (x = range; x >= 0; x--) {
rmap[x] = redcmap[x];
gmap[x] = greencmap[x];
bmap[x] = bluecmap[x];
}
}
if (bitspersample <= 8) {
/*
* Use mapping table to construct
* unpacking tables for samples < 8 bits.
*/
if (!makecmap())
return (0);
}
break;
default:
TIFFError(filename, "Unknown photometric tag %u", photometric);
return (0);
}
if (planarconfig == PLANARCONFIG_SEPARATE && samplesperpixel > 1) {
e = TIFFIsTiled(tif) ? gtTileSeparate (tif, raster, Map, h, w, bpp) :
gtStripSeparate(tif, raster, Map, h, w, bpp);
} else {
e = TIFFIsTiled(tif) ? gtTileContig (tif, raster, Map, h, w, bpp) :
gtStripContig(tif, raster, Map, h, w, bpp);
}
if (Map) free((char *)Map);
return (e);
}
/*******************************************/
static uint32 setorientation(tif, h)
TIFF *tif;
uint32 h;
{
/* note that orientation was flipped in LoadTIFF() (near line 175) */
uint32 y;
TIFFGetFieldDefaulted(tif, TIFFTAG_ORIENTATION, &orientation);
switch (orientation) {
case ORIENTATION_BOTRIGHT:
case ORIENTATION_RIGHTBOT: /* XXX */
case ORIENTATION_LEFTBOT: /* XXX */
TIFFWarning(filename, "using bottom-left orientation");
orientation = ORIENTATION_BOTLEFT;
/* fall thru... */
case ORIENTATION_BOTLEFT:
y = 0;
break;
case ORIENTATION_TOPRIGHT:
case ORIENTATION_RIGHTTOP: /* XXX */
case ORIENTATION_LEFTTOP: /* XXX */
default:
TIFFWarning(filename, "using top-left orientation");
orientation = ORIENTATION_TOPLEFT;
/* fall thru... */
case ORIENTATION_TOPLEFT:
/* GRR 20050319: This may be wrong for tiled images (also stripped?);
* looks like we want to return th-1 instead of h-1 in at least some
* cases. For now, just added quick hack (USE_TILED_TIFF_BOTLEFT_FIX)
* to gtTileContig(). (Note that, as of libtiff 3.7.1, tiffcp still
* has exactly the same bug.) */
y = h-1;
break;
}
return (y);
}
/*
* Get a tile-organized image that has
* PlanarConfiguration contiguous if SamplesPerPixel > 1
* or
* SamplesPerPixel == 1
*/
/*******************************************/
static int gtTileContig(tif, raster, Map, h, w, bpp)
TIFF *tif;
byte *raster;
RGBvalue *Map;
uint32 h, w;
int bpp;
{
uint32 col, row, y;
uint32 tw, th;
u_char *buf;
int fromskew, toskew;
u_int nrow;
tileContigRoutine put;
tsize_t bufsize;
put = pickTileContigCase(Map);
if (put == 0) return (0);
bufsize = TIFFTileSize(tif);
if (bufsize <= 0) return 0; /* tsize_t is signed */
buf = (u_char *) malloc((size_t) bufsize);
if (buf == 0) {
TIFFError(filename, "No space for tile buffer");
return (0);