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b7508608aa
libtiff/libtiff/tif_dirwrite.c
Frank Warmerdam 4b1d7e4c29 added TIFFRewriteDirectory
2001-09-26 17:42:18 +00:00

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/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirwrite.c,v 1.9 2001-09-26 17:42:18 warmerda 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.
*/
/*
* TIFF Library.
*
* Directory Write Support Routines.
*/
#include "tiffiop.h"
#if HAVE_IEEEFP
#define TIFFCvtNativeToIEEEFloat(tif, n, fp)
#define TIFFCvtNativeToIEEEDouble(tif, n, dp)
#else
extern void TIFFCvtNativeToIEEEFloat(TIFF*, uint32, float*);
extern void TIFFCvtNativeToIEEEDouble(TIFF*, uint32, double*);
#endif
static int TIFFWriteNormalTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*);
static void TIFFSetupShortLong(TIFF*, ttag_t, TIFFDirEntry*, uint32);
static int TIFFSetupShortPair(TIFF*, ttag_t, TIFFDirEntry*);
static int TIFFWritePerSampleShorts(TIFF*, ttag_t, TIFFDirEntry*);
static int TIFFWritePerSampleAnys(TIFF*, TIFFDataType, ttag_t, TIFFDirEntry*);
static int TIFFWriteShortTable(TIFF*, ttag_t, TIFFDirEntry*, uint32, uint16**);
static int TIFFWriteShortArray(TIFF*,
TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint16*);
static int TIFFWriteLongArray(TIFF *,
TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint32*);
static int TIFFWriteRationalArray(TIFF *,
TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
static int TIFFWriteFloatArray(TIFF *,
TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
static int TIFFWriteDoubleArray(TIFF *,
TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
static int TIFFWriteByteArray(TIFF*, TIFFDirEntry*, char*);
static int TIFFWriteAnyArray(TIFF*,
TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
#ifdef COLORIMETRY_SUPPORT
static int TIFFWriteTransferFunction(TIFF*, TIFFDirEntry*);
#endif
#ifdef CMYK_SUPPORT
static int TIFFWriteInkNames(TIFF*, TIFFDirEntry*);
#endif
static int TIFFWriteData(TIFF*, TIFFDirEntry*, char*);
static int TIFFLinkDirectory(TIFF*);
#define WriteRationalPair(type, tag1, v1, tag2, v2) { \
if (!TIFFWriteRational(tif, type, tag1, dir, v1)) \
goto bad; \
if (!TIFFWriteRational(tif, type, tag2, dir+1, v2)) \
goto bad; \
dir++; \
}
#define TIFFWriteRational(tif, type, tag, dir, v) \
TIFFWriteRationalArray((tif), (type), (tag), (dir), 1, &(v))
#ifndef TIFFWriteRational
static int TIFFWriteRational(TIFF*,
TIFFDataType, ttag_t, TIFFDirEntry*, float);
#endif
/*
* Write the contents of the current directory
* to the specified file. This routine doesn't
* handle overwriting a directory with auxiliary
* storage that's been changed.
*/
int
TIFFWriteDirectory(TIFF* tif)
{
uint16 dircount;
toff_t diroff;
ttag_t tag;
uint32 nfields;
tsize_t dirsize;
char* data;
TIFFDirEntry* dir;
TIFFDirectory* td;
u_long b, fields[FIELD_SETLONGS];
int fi, nfi;
if (tif->tif_mode == O_RDONLY)
return (1);
/*
* Clear write state so that subsequent images with
* different characteristics get the right buffers
* setup for them.
*/
if (tif->tif_flags & TIFF_POSTENCODE) {
tif->tif_flags &= ~TIFF_POSTENCODE;
if (!(*tif->tif_postencode)(tif)) {
TIFFError(tif->tif_name,
"Error post-encoding before directory write");
return (0);
}
}
(*tif->tif_close)(tif); /* shutdown encoder */
/*
* Flush any data that might have been written
* by the compression close+cleanup routines.
*/
if (tif->tif_rawcc > 0 && !TIFFFlushData1(tif)) {
TIFFError(tif->tif_name,
"Error flushing data before directory write");
return (0);
}
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
_TIFFfree(tif->tif_rawdata);
tif->tif_rawdata = NULL;
tif->tif_rawcc = 0;
tif->tif_rawdatasize = 0;
}
tif->tif_flags &= ~(TIFF_BEENWRITING|TIFF_BUFFERSETUP);
td = &tif->tif_dir;
/*
* Size the directory so that we can calculate
* offsets for the data items that aren't kept
* in-place in each field.
*/
nfields = 0;
for (b = 0; b <= FIELD_LAST; b++)
if (TIFFFieldSet(tif, b))
nfields += (b < FIELD_SUBFILETYPE ? 2 : 1);
dirsize = nfields * sizeof (TIFFDirEntry);
data = (char*) _TIFFmalloc(dirsize);
if (data == NULL) {
TIFFError(tif->tif_name,
"Cannot write directory, out of space");
return (0);
}
/*
* Directory hasn't been placed yet, put
* it at the end of the file and link it
* into the existing directory structure.
*/
if (tif->tif_diroff == 0 && !TIFFLinkDirectory(tif))
goto bad;
tif->tif_dataoff = (toff_t)(
tif->tif_diroff + sizeof (uint16) + dirsize + sizeof (toff_t));
if (tif->tif_dataoff & 1)
tif->tif_dataoff++;
(void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET);
tif->tif_curdir++;
dir = (TIFFDirEntry*) data;
/*
* Setup external form of directory
* entries and write data items.
*/
_TIFFmemcpy(fields, td->td_fieldsset, sizeof (fields));
/*
* Write out ExtraSamples tag only if
* extra samples are present in the data.
*/
if (FieldSet(fields, FIELD_EXTRASAMPLES) && !td->td_extrasamples) {
ResetFieldBit(fields, FIELD_EXTRASAMPLES);
nfields--;
dirsize -= sizeof (TIFFDirEntry);
} /*XXX*/
for (fi = 0, nfi = tif->tif_nfields; nfi > 0; nfi--, fi++) {
const TIFFFieldInfo* fip = tif->tif_fieldinfo[fi];
if (!FieldSet(fields, fip->field_bit))
continue;
switch (fip->field_bit) {
case FIELD_STRIPOFFSETS:
/*
* We use one field bit for both strip and tile
* offsets, and so must be careful in selecting
* the appropriate field descriptor (so that tags
* are written in sorted order).
*/
tag = isTiled(tif) ?
TIFFTAG_TILEOFFSETS : TIFFTAG_STRIPOFFSETS;
if (tag != fip->field_tag)
continue;
if (!TIFFWriteLongArray(tif, TIFF_LONG, tag, dir,
(uint32) td->td_nstrips, td->td_stripoffset))
goto bad;
break;
case FIELD_STRIPBYTECOUNTS:
/*
* We use one field bit for both strip and tile
* byte counts, and so must be careful in selecting
* the appropriate field descriptor (so that tags
* are written in sorted order).
*/
tag = isTiled(tif) ?
TIFFTAG_TILEBYTECOUNTS : TIFFTAG_STRIPBYTECOUNTS;
if (tag != fip->field_tag)
continue;
if (!TIFFWriteLongArray(tif, TIFF_LONG, tag, dir,
(uint32) td->td_nstrips, td->td_stripbytecount))
goto bad;
break;
case FIELD_ROWSPERSTRIP:
TIFFSetupShortLong(tif, TIFFTAG_ROWSPERSTRIP,
dir, td->td_rowsperstrip);
break;
case FIELD_COLORMAP:
if (!TIFFWriteShortTable(tif, TIFFTAG_COLORMAP, dir,
3, td->td_colormap))
goto bad;
break;
case FIELD_IMAGEDIMENSIONS:
TIFFSetupShortLong(tif, TIFFTAG_IMAGEWIDTH,
dir++, td->td_imagewidth);
TIFFSetupShortLong(tif, TIFFTAG_IMAGELENGTH,
dir, td->td_imagelength);
break;
case FIELD_TILEDIMENSIONS:
TIFFSetupShortLong(tif, TIFFTAG_TILEWIDTH,
dir++, td->td_tilewidth);
TIFFSetupShortLong(tif, TIFFTAG_TILELENGTH,
dir, td->td_tilelength);
break;
case FIELD_POSITION:
WriteRationalPair(TIFF_RATIONAL,
TIFFTAG_XPOSITION, td->td_xposition,
TIFFTAG_YPOSITION, td->td_yposition);
break;
case FIELD_RESOLUTION:
WriteRationalPair(TIFF_RATIONAL,
TIFFTAG_XRESOLUTION, td->td_xresolution,
TIFFTAG_YRESOLUTION, td->td_yresolution);
break;
case FIELD_BITSPERSAMPLE:
case FIELD_MINSAMPLEVALUE:
case FIELD_MAXSAMPLEVALUE:
case FIELD_SAMPLEFORMAT:
if (!TIFFWritePerSampleShorts(tif, fip->field_tag, dir))
goto bad;
break;
case FIELD_SMINSAMPLEVALUE:
case FIELD_SMAXSAMPLEVALUE:
if (!TIFFWritePerSampleAnys(tif,
_TIFFSampleToTagType(tif), fip->field_tag, dir))
goto bad;
break;
case FIELD_PAGENUMBER:
case FIELD_HALFTONEHINTS:
#ifdef YCBCR_SUPPORT
case FIELD_YCBCRSUBSAMPLING:
#endif
#ifdef CMYK_SUPPORT
case FIELD_DOTRANGE:
#endif
if (!TIFFSetupShortPair(tif, fip->field_tag, dir))
goto bad;
break;
#ifdef CMYK_SUPPORT
case FIELD_INKNAMES:
if (!TIFFWriteInkNames(tif, dir))
goto bad;
break;
#endif
#ifdef COLORIMETRY_SUPPORT
case FIELD_TRANSFERFUNCTION:
if (!TIFFWriteTransferFunction(tif, dir))
goto bad;
break;
#endif
#if SUBIFD_SUPPORT
case FIELD_SUBIFD:
if (!TIFFWriteNormalTag(tif, dir, fip))
goto bad;
/*
* Total hack: if this directory includes a SubIFD
* tag then force the next <n> directories to be
* written as ``sub directories'' of this one. This
* is used to write things like thumbnails and
* image masks that one wants to keep out of the
* normal directory linkage access mechanism.
*/
if (dir->tdir_count > 0) {
tif->tif_flags |= TIFF_INSUBIFD;
tif->tif_nsubifd = (uint16) dir->tdir_count;
if (dir->tdir_count > 1)
tif->tif_subifdoff = dir->tdir_offset;
else
tif->tif_subifdoff = (uint32)(
tif->tif_diroff
+ sizeof (uint16)
+ ((char*)&dir->tdir_offset-data));
}
break;
#endif
default:
if (!TIFFWriteNormalTag(tif, dir, fip))
goto bad;
break;
}
dir++;
ResetFieldBit(fields, fip->field_bit);
}
/*
* Write directory.
*/
dircount = (uint16) nfields;
diroff = (uint32) tif->tif_nextdiroff;
if (tif->tif_flags & TIFF_SWAB) {
/*
* The file's byte order is opposite to the
* native machine architecture. We overwrite
* the directory information with impunity
* because it'll be released below after we
* write it to the file. Note that all the
* other tag construction routines assume that
* we do this byte-swapping; i.e. they only
* byte-swap indirect data.
*/
for (dir = (TIFFDirEntry*) data; dircount; dir++, dircount--) {
TIFFSwabArrayOfShort(&dir->tdir_tag, 2);
TIFFSwabArrayOfLong(&dir->tdir_count, 2);
}
dircount = (uint16) nfields;
TIFFSwabShort(&dircount);
TIFFSwabLong(&diroff);
}
(void) TIFFSeekFile(tif, tif->tif_diroff, SEEK_SET);
if (!WriteOK(tif, &dircount, sizeof (dircount))) {
TIFFError(tif->tif_name, "Error writing directory count");
goto bad;
}
if (!WriteOK(tif, data, dirsize)) {
TIFFError(tif->tif_name, "Error writing directory contents");
goto bad;
}
if (!WriteOK(tif, &diroff, sizeof (diroff))) {
TIFFError(tif->tif_name, "Error writing directory link");
goto bad;
}
TIFFFreeDirectory(tif);
_TIFFfree(data);
tif->tif_flags &= ~TIFF_DIRTYDIRECT;
(*tif->tif_cleanup)(tif);
/*
* Reset directory-related state for subsequent
* directories.
*/
TIFFCreateDirectory(tif);
return (1);
bad:
_TIFFfree(data);
return (0);
}
#undef WriteRationalPair
/*
* Process tags that are not special cased.
*/
static int
TIFFWriteNormalTag(TIFF* tif, TIFFDirEntry* dir, const TIFFFieldInfo* fip)
{
u_short wc = (u_short) fip->field_writecount;
uint32 wc2;
dir->tdir_tag = (uint16) fip->field_tag;
dir->tdir_type = (u_short) fip->field_type;
dir->tdir_count = wc;
#define WRITEF(x,y) x(tif, fip->field_type, fip->field_tag, dir, wc, y)
switch (fip->field_type) {
case TIFF_SHORT:
case TIFF_SSHORT:
if (wc > 1) {
uint16* wp;
if (wc == (u_short) TIFF_VARIABLE)
TIFFGetField(tif, fip->field_tag, &wc, &wp);
else
TIFFGetField(tif, fip->field_tag, &wp);
if (!WRITEF(TIFFWriteShortArray, wp))
return (0);
} else {
uint16 sv;
TIFFGetField(tif, fip->field_tag, &sv);
dir->tdir_offset =
TIFFInsertData(tif, dir->tdir_type, sv);
}
break;
case TIFF_LONG:
case TIFF_SLONG:
if (wc > 1) {
uint32* lp;
if (wc == (u_short) TIFF_VARIABLE)
TIFFGetField(tif, fip->field_tag, &wc, &lp);
else
TIFFGetField(tif, fip->field_tag, &lp);
if (!WRITEF(TIFFWriteLongArray, lp))
return (0);
} else {
/* XXX handle LONG->SHORT conversion */
TIFFGetField(tif, fip->field_tag, &dir->tdir_offset);
}
break;
case TIFF_RATIONAL:
case TIFF_SRATIONAL:
if (wc > 1) {
float* fp;
if (wc == (u_short) TIFF_VARIABLE)
TIFFGetField(tif, fip->field_tag, &wc, &fp);
else
TIFFGetField(tif, fip->field_tag, &fp);
if (!WRITEF(TIFFWriteRationalArray, fp))
return (0);
} else {
float fv;
TIFFGetField(tif, fip->field_tag, &fv);
if (!WRITEF(TIFFWriteRationalArray, &fv))
return (0);
}
break;
case TIFF_FLOAT:
if (wc > 1) {
float* fp;
if (wc == (u_short) TIFF_VARIABLE)
TIFFGetField(tif, fip->field_tag, &wc, &fp);
else
TIFFGetField(tif, fip->field_tag, &fp);
if (!WRITEF(TIFFWriteFloatArray, fp))
return (0);
} else {
float fv;
TIFFGetField(tif, fip->field_tag, &fv);
if (!WRITEF(TIFFWriteFloatArray, &fv))
return (0);
}
break;
case TIFF_DOUBLE:
if (wc > 1) {
double* dp;
if (wc == (u_short) TIFF_VARIABLE)
TIFFGetField(tif, fip->field_tag, &wc, &dp);
else
TIFFGetField(tif, fip->field_tag, &dp);
if (!WRITEF(TIFFWriteDoubleArray, dp))
return (0);
} else {
double dv;
TIFFGetField(tif, fip->field_tag, &dv);
if (!WRITEF(TIFFWriteDoubleArray, &dv))
return (0);
}
break;
case TIFF_ASCII:
{ char* cp;
TIFFGetField(tif, fip->field_tag, &cp);
dir->tdir_count = (uint32) (strlen(cp) + 1);
if (!TIFFWriteByteArray(tif, dir, cp))
return (0);
}
break;
/* added based on patch request from MARTIN.MCBRIDE.MM@agfa.co.uk,
correctness not verified (FW, 99/08) */
case TIFF_BYTE:
case TIFF_SBYTE:
if (wc > 1) {
char* cp;
if (wc == (u_short) TIFF_VARIABLE) {
TIFFGetField(tif, fip->field_tag, &wc, &cp);
dir->tdir_count = wc;
} else if (wc == (u_short) TIFF_VARIABLE2) {
TIFFGetField(tif, fip->field_tag, &wc2, &cp);
dir->tdir_count = wc2;
} else
TIFFGetField(tif, fip->field_tag, &cp);
if (!TIFFWriteByteArray(tif, dir, cp))
return (0);
} else {
char cv;
TIFFGetField(tif, fip->field_tag, &cv);
if (!TIFFWriteByteArray(tif, dir, &cv))
return (0);
}
break;
case TIFF_UNDEFINED:
{ char* cp;
if (wc == (u_short) TIFF_VARIABLE) {
TIFFGetField(tif, fip->field_tag, &wc, &cp);
dir->tdir_count = wc;
} else if (wc == (u_short) TIFF_VARIABLE2) {
TIFFGetField(tif, fip->field_tag, &wc2, &cp);
dir->tdir_count = wc2;
} else
TIFFGetField(tif, fip->field_tag, &cp);
if (!TIFFWriteByteArray(tif, dir, cp))
return (0);
}
break;
case TIFF_NOTYPE:
break;
}
return (1);
}
#undef WRITEF
/*
* Setup a directory entry with either a SHORT
* or LONG type according to the value.
*/
static void
TIFFSetupShortLong(TIFF* tif, ttag_t tag, TIFFDirEntry* dir, uint32 v)
{
dir->tdir_tag = (uint16) tag;
dir->tdir_count = 1;
if (v > 0xffffL) {
dir->tdir_type = (short) TIFF_LONG;
dir->tdir_offset = v;
} else {
dir->tdir_type = (short) TIFF_SHORT;
dir->tdir_offset = TIFFInsertData(tif, (int) TIFF_SHORT, v);
}
}
#undef MakeShortDirent
#ifndef TIFFWriteRational
/*
* Setup a RATIONAL directory entry and
* write the associated indirect value.
*/
static int
TIFFWriteRational(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, float v)
{
return (TIFFWriteRationalArray(tif, type, tag, dir, 1, &v));
}
#endif
#define NITEMS(x) (sizeof (x) / sizeof (x[0]))
/*
* Setup a directory entry that references a
* samples/pixel array of SHORT values and
* (potentially) write the associated indirect
* values.
*/
static int
TIFFWritePerSampleShorts(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
{
uint16 buf[10], v;
uint16* w = buf;
int i, status, samples = tif->tif_dir.td_samplesperpixel;
if (samples > NITEMS(buf))
w = (uint16*) _TIFFmalloc(samples * sizeof (uint16));
TIFFGetField(tif, tag, &v);
for (i = 0; i < samples; i++)
w[i] = v;
status = TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, samples, w);
if (w != buf)
_TIFFfree((char*) w);
return (status);
}
/*
* Setup a directory entry that references a samples/pixel array of ``type''
* values and (potentially) write the associated indirect values. The source
* data from TIFFGetField() for the specified tag must be returned as double.
*/
static int
TIFFWritePerSampleAnys(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir)
{
double buf[10], v;
double* w = buf;
int i, status;
int samples = (int) tif->tif_dir.td_samplesperpixel;
if (samples > NITEMS(buf))
w = (double*) _TIFFmalloc(samples * sizeof (double));
TIFFGetField(tif, tag, &v);
for (i = 0; i < samples; i++)
w[i] = v;
status = TIFFWriteAnyArray(tif, type, tag, dir, samples, w);
if (w != buf)
_TIFFfree(w);
return (status);
}
#undef NITEMS
/*
* Setup a pair of shorts that are returned by
* value, rather than as a reference to an array.
*/
static int
TIFFSetupShortPair(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
{
uint16 v[2];
TIFFGetField(tif, tag, &v[0], &v[1]);
return (TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, 2, v));
}
/*
* Setup a directory entry for an NxM table of shorts,
* where M is known to be 2**bitspersample, and write
* the associated indirect data.
*/
static int
TIFFWriteShortTable(TIFF* tif,
ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16** table)
{
uint32 i, off;
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) TIFF_SHORT;
/* XXX -- yech, fool TIFFWriteData */
dir->tdir_count = (uint32) (1L<<tif->tif_dir.td_bitspersample);
off = tif->tif_dataoff;
for (i = 0; i < n; i++)
if (!TIFFWriteData(tif, dir, (char *)table[i]))
return (0);
dir->tdir_count *= n;
dir->tdir_offset = off;
return (1);
}
/*
* Write/copy data associated with an ASCII or opaque tag value.
*/
static int
TIFFWriteByteArray(TIFF* tif, TIFFDirEntry* dir, char* cp)
{
if (dir->tdir_count > 4) {
if (!TIFFWriteData(tif, dir, cp))
return (0);
} else
_TIFFmemcpy(&dir->tdir_offset, cp, dir->tdir_count);
return (1);
}
/*
* Setup a directory entry of an array of SHORT
* or SSHORT and write the associated indirect values.
*/
static int
TIFFWriteShortArray(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16* v)
{
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) type;
dir->tdir_count = n;
if (n <= 2) {
if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
dir->tdir_offset = (uint32) ((long) v[0] << 16);
if (n == 2)
dir->tdir_offset |= v[1] & 0xffff;
} else {
dir->tdir_offset = v[0] & 0xffff;
if (n == 2)
dir->tdir_offset |= (long) v[1] << 16;
}
return (1);
} else
return (TIFFWriteData(tif, dir, (char*) v));
}
/*
* Setup a directory entry of an array of LONG
* or SLONG and write the associated indirect values.
*/
static int
TIFFWriteLongArray(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint32* v)
{
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) type;
dir->tdir_count = n;
if (n == 1) {
dir->tdir_offset = v[0];
return (1);
} else
return (TIFFWriteData(tif, dir, (char*) v));
}
/*
* Setup a directory entry of an array of RATIONAL
* or SRATIONAL and write the associated indirect values.
*/
static int
TIFFWriteRationalArray(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
{
uint32 i;
uint32* t;
int status;
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) type;
dir->tdir_count = n;
t = (uint32*) _TIFFmalloc(2*n * sizeof (uint32));
for (i = 0; i < n; i++) {
float fv = v[i];
int sign = 1;
uint32 den;
if (fv < 0) {
if (type == TIFF_RATIONAL) {
TIFFWarning(tif->tif_name,
"\"%s\": Information lost writing value (%g) as (unsigned) RATIONAL",
_TIFFFieldWithTag(tif,tag)->field_name, fv);
fv = 0;
} else
fv = -fv, sign = -1;
}
den = 1L;
if (fv > 0) {
while (fv < 1L<<(31-3) && den < 1L<<(31-3))
fv *= 1<<3, den *= 1L<<3;
}
t[2*i+0] = (uint32) (sign * (fv + 0.5));
t[2*i+1] = den;
}
status = TIFFWriteData(tif, dir, (char *)t);
_TIFFfree((char*) t);
return (status);
}
static int
TIFFWriteFloatArray(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
{
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) type;
dir->tdir_count = n;
TIFFCvtNativeToIEEEFloat(tif, n, v);
if (n == 1) {
dir->tdir_offset = *(uint32*) &v[0];
return (1);
} else
return (TIFFWriteData(tif, dir, (char*) v));
}
static int
TIFFWriteDoubleArray(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
{
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) type;
dir->tdir_count = n;
TIFFCvtNativeToIEEEDouble(tif, n, v);
return (TIFFWriteData(tif, dir, (char*) v));
}
/*
* Write an array of ``type'' values for a specified tag (i.e. this is a tag
* which is allowed to have different types, e.g. SMaxSampleType).
* Internally the data values are represented as double since a double can
* hold any of the TIFF tag types (yes, this should really be an abstract
* type tany_t for portability). The data is converted into the specified
* type in a temporary buffer and then handed off to the appropriate array
* writer.
*/
static int
TIFFWriteAnyArray(TIFF* tif,
TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
{
char buf[10 * sizeof(double)];
char* w = buf;
int i, status = 0;
if (n * tiffDataWidth[type] > sizeof buf)
w = (char*) _TIFFmalloc(n * tiffDataWidth[type]);
switch (type) {
case TIFF_BYTE:
{ uint8* bp = (uint8*) w;
for (i = 0; i < (int) n; i++)
bp[i] = (uint8) v[i];
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) type;
dir->tdir_count = n;
if (!TIFFWriteByteArray(tif, dir, (char*) bp))
goto out;
}
break;
case TIFF_SBYTE:
{ int8* bp = (int8*) w;
for (i = 0; i < (int) n; i++)
bp[i] = (int8) v[i];
dir->tdir_tag = (uint16) tag;
dir->tdir_type = (short) type;
dir->tdir_count = n;
if (!TIFFWriteByteArray(tif, dir, (char*) bp))
goto out;
}
break;
case TIFF_SHORT:
{ uint16* bp = (uint16*) w;
for (i = 0; i < (int) n; i++)
bp[i] = (uint16) v[i];
if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
goto out;
}
break;
case TIFF_SSHORT:
{ int16* bp = (int16*) w;
for (i = 0; i < (int) n; i++)
bp[i] = (int16) v[i];
if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
goto out;
}
break;
case TIFF_LONG:
{ uint32* bp = (uint32*) w;
for (i = 0; i < (int) n; i++)
bp[i] = (uint32) v[i];
if (!TIFFWriteLongArray(tif, type, tag, dir, n, bp))
goto out;
}
break;
case TIFF_SLONG:
{ int32* bp = (int32*) w;
for (i = 0; i < (int) n; i++)
bp[i] = (int32) v[i];
if (!TIFFWriteLongArray(tif, type, tag, dir, n, (uint32*) bp))
goto out;
}
break;
case TIFF_FLOAT:
{ float* bp = (float*) w;
for (i = 0; i < (int) n; i++)
bp[i] = (float) v[i];
if (!TIFFWriteFloatArray(tif, type, tag, dir, n, bp))
goto out;
}
break;
case TIFF_DOUBLE:
return (TIFFWriteDoubleArray(tif, type, tag, dir, n, v));
default:
/* TIFF_NOTYPE */
/* TIFF_ASCII */
/* TIFF_UNDEFINED */
/* TIFF_RATIONAL */
/* TIFF_SRATIONAL */
goto out;
}
status = 1;
out:
if (w != buf)
_TIFFfree(w);
return (status);
}
#ifdef COLORIMETRY_SUPPORT
static int
TIFFWriteTransferFunction(TIFF* tif, TIFFDirEntry* dir)
{
TIFFDirectory* td = &tif->tif_dir;
tsize_t n = (1L<<td->td_bitspersample) * sizeof (uint16);
uint16** tf = td->td_transferfunction;
int ncols;
/*
* Check if the table can be written as a single column,
* or if it must be written as 3 columns. Note that we
* write a 3-column tag if there are 2 samples/pixel and
* a single column of data won't suffice--hmm.
*/
switch (td->td_samplesperpixel - td->td_extrasamples) {
default: if (_TIFFmemcmp(tf[0], tf[2], n)) { ncols = 3; break; }
case 2: if (_TIFFmemcmp(tf[0], tf[1], n)) { ncols = 3; break; }
case 1: case 0: ncols = 1;
}
return (TIFFWriteShortTable(tif,
TIFFTAG_TRANSFERFUNCTION, dir, ncols, tf));
}
#endif
#ifdef CMYK_SUPPORT
static int
TIFFWriteInkNames(TIFF* tif, TIFFDirEntry* dir)
{
TIFFDirectory* td = &tif->tif_dir;
dir->tdir_tag = TIFFTAG_INKNAMES;
dir->tdir_type = (short) TIFF_ASCII;
dir->tdir_count = td->td_inknameslen;
return (TIFFWriteByteArray(tif, dir, td->td_inknames));
}
#endif
/*
* Write a contiguous directory item.
*/
static int
TIFFWriteData(TIFF* tif, TIFFDirEntry* dir, char* cp)
{
tsize_t cc;
if (tif->tif_flags & TIFF_SWAB) {
switch (dir->tdir_type) {
case TIFF_SHORT:
case TIFF_SSHORT:
TIFFSwabArrayOfShort((uint16*) cp, dir->tdir_count);
break;
case TIFF_LONG:
case TIFF_SLONG:
case TIFF_FLOAT:
TIFFSwabArrayOfLong((uint32*) cp, dir->tdir_count);
break;
case TIFF_RATIONAL:
case TIFF_SRATIONAL:
TIFFSwabArrayOfLong((uint32*) cp, 2*dir->tdir_count);
break;
case TIFF_DOUBLE:
TIFFSwabArrayOfDouble((double*) cp, dir->tdir_count);
break;
}
}
dir->tdir_offset = tif->tif_dataoff;
cc = dir->tdir_count * tiffDataWidth[dir->tdir_type];
if (SeekOK(tif, dir->tdir_offset) &&
WriteOK(tif, cp, cc)) {
tif->tif_dataoff += (cc + 1) & ~1;
return (1);
}
TIFFError(tif->tif_name, "Error writing data for field \"%s\"",
_TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
return (0);
}
/*
* Similar to TIFFWriteDirectory(), but if the directory has already
* been written once, it is relocated to the end of the file, in case it
* has changed in size. Note that this will result in the loss of the
* previously used directory space.
*/
int
TIFFRewriteDirectory( TIFF *tif )
{
static const char module[] = "TIFFRewriteDirectory";
/* We don't need to do anything special if it hasn't been written. */
if( tif->tif_diroff == 0 )
return TIFFWriteDirectory( tif );
/*
** Find and zero the pointer to this directory, so that TIFFLinkDirectory
** will cause it to be added after this directories current pre-link.
*/
/* Is it the first directory in the file? */
if (tif->tif_header.tiff_diroff == tif->tif_diroff)
{
tif->tif_header.tiff_diroff = 0;
tif->tif_diroff = 0;
#define HDROFF(f) ((toff_t) &(((TIFFHeader*) 0)->f))
TIFFSeekFile(tif, HDROFF(tiff_diroff), SEEK_SET);
if (!WriteOK(tif, &(tif->tif_header.tiff_diroff),
sizeof (tif->tif_diroff)))
{
TIFFError(tif->tif_name, "Error updating TIFF header");
return (0);
}
}
else
{
toff_t nextdir, off;
nextdir = tif->tif_header.tiff_diroff;
do {
uint16 dircount;
if (!SeekOK(tif, nextdir) ||
!ReadOK(tif, &dircount, sizeof (dircount))) {
TIFFError(module, "Error fetching directory count");
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabShort(&dircount);
(void) TIFFSeekFile(tif,
dircount * sizeof (TIFFDirEntry), SEEK_CUR);
if (!ReadOK(tif, &nextdir, sizeof (nextdir))) {
TIFFError(module, "Error fetching directory link");
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&nextdir);
} while (nextdir != tif->tif_diroff && nextdir != 0);
off = TIFFSeekFile(tif, 0, SEEK_CUR); /* get current offset */
(void) TIFFSeekFile(tif, off - (toff_t)sizeof(nextdir), SEEK_SET);
tif->tif_diroff = 0;
if (!WriteOK(tif, &(tif->tif_diroff), sizeof (nextdir))) {
TIFFError(module, "Error writing directory link");
return (0);
}
}
/*
** Now use TIFFWriteDirectory() normally.
*/
return TIFFWriteDirectory( tif );
}
/*
* Link the current directory into the
* directory chain for the file.
*/
static int
TIFFLinkDirectory(TIFF* tif)
{
static const char module[] = "TIFFLinkDirectory";
toff_t nextdir;
toff_t diroff, off;
tif->tif_diroff = (TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;
diroff = tif->tif_diroff;
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&diroff);
#if SUBIFD_SUPPORT
if (tif->tif_flags & TIFF_INSUBIFD) {
(void) TIFFSeekFile(tif, tif->tif_subifdoff, SEEK_SET);
if (!WriteOK(tif, &diroff, sizeof (diroff))) {
TIFFError(module,
"%s: Error writing SubIFD directory link",
tif->tif_name);
return (0);
}
/*
* Advance to the next SubIFD or, if this is
* the last one configured, revert back to the
* normal directory linkage.
*/
if (--tif->tif_nsubifd)
tif->tif_subifdoff += sizeof (diroff);
else
tif->tif_flags &= ~TIFF_INSUBIFD;
return (1);
}
#endif
if (tif->tif_header.tiff_diroff == 0) {
/*
* First directory, overwrite offset in header.
*/
tif->tif_header.tiff_diroff = tif->tif_diroff;
#define HDROFF(f) ((toff_t) &(((TIFFHeader*) 0)->f))
(void) TIFFSeekFile(tif, HDROFF(tiff_diroff), SEEK_SET);
if (!WriteOK(tif, &diroff, sizeof (diroff))) {
TIFFError(tif->tif_name, "Error writing TIFF header");
return (0);
}
return (1);
}
/*
* Not the first directory, search to the last and append.
*/
nextdir = tif->tif_header.tiff_diroff;
do {
uint16 dircount;
if (!SeekOK(tif, nextdir) ||
!ReadOK(tif, &dircount, sizeof (dircount))) {
TIFFError(module, "Error fetching directory count");
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabShort(&dircount);
(void) TIFFSeekFile(tif,
dircount * sizeof (TIFFDirEntry), SEEK_CUR);
if (!ReadOK(tif, &nextdir, sizeof (nextdir))) {
TIFFError(module, "Error fetching directory link");
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&nextdir);
} while (nextdir != 0);
off = TIFFSeekFile(tif, 0, SEEK_CUR); /* get current offset */
(void) TIFFSeekFile(tif, off - (toff_t)sizeof(nextdir), SEEK_SET);
if (!WriteOK(tif, &diroff, sizeof (diroff))) {
TIFFError(module, "Error writing directory link");
return (0);
}
return (1);
}
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