This is tif_dirwrite.c in view mode; [Download] [Up]
#ifndef lint
static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_dirwrite.c,v 1.31 93/08/26 14:24:07 sam Exp $";
#endif
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992 Sam Leffler
* Copyright (c) 1991, 1992 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)
#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 TIFFWriteRational(TIFF*,
TIFFDataType, ttag_t, TIFFDirEntry*, float);
static int TIFFWritePerSampleShorts(TIFF*, 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 TIFFWriteString(TIFF*, ttag_t, TIFFDirEntry*, char*);
#ifdef JPEG_SUPPORT
static int TIFFWriteJPEGQTables(TIFF*, TIFFDirEntry*);
static int TIFFWriteJPEGCTables(TIFF*, ttag_t, TIFFDirEntry*, u_char**);
#endif
#ifdef COLORIMETRY_SUPPORT
static int TIFFWriteTransferFunction(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++; \
}
/*
* 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)
{
short dircount, tag;
int nfields, dirsize;
char *data;
const TIFFFieldInfo *fip;
TIFFDirEntry *dir;
TIFFDirectory *td;
u_long b, fields[FIELD_SETLONGS];
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->tif_postencode)(tif)) {
TIFFError(tif->tif_name,
"Error post-encoding before directory write");
return (0);
}
}
if (tif->tif_close)
(*tif->tif_close)(tif);
if (tif->tif_cleanup)
(*tif->tif_cleanup)(tif);
/*
* 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_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 = _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 =
tif->tif_diroff + sizeof (short) + dirsize + sizeof (long);
if (tif->tif_dataoff & 1)
tif->tif_dataoff++;
(void) TIFFSeekFile(tif, tif->tif_dataoff, L_SET);
tif->tif_curdir++;
dir = (TIFFDirEntry *)data;
/*
* Setup external form of directory
* entries and write data items.
*/
memcpy(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 (fip = tiffFieldInfo; fip->field_tag; fip++) {
if (fip->field_bit == FIELD_IGNORE ||
!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_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 JPEG_SUPPORT
case FIELD_JPEGQTABLES:
if (!TIFFWriteJPEGQTables(tif, dir))
goto bad;
break;
case FIELD_JPEGDCTABLES:
if (!TIFFWriteJPEGCTables(tif,
TIFFTAG_JPEGDCTABLES, dir, td->td_dctab))
goto bad;
break;
case FIELD_JPEGACTABLES:
if (!TIFFWriteJPEGCTables(tif,
TIFFTAG_JPEGACTABLES, dir, td->td_actab))
goto bad;
break;
#endif
#ifdef COLORIMETRY_SUPPORT
case FIELD_TRANSFERFUNCTION:
if (!TIFFWriteTransferFunction(tif, dir))
goto bad;
break;
#endif
default:
if (!TIFFWriteNormalTag(tif, dir, fip))
goto bad;
break;
}
dir++;
ResetFieldBit(fields, fip->field_bit);
}
/*
* Write directory.
*/
(void) TIFFSeekFile(tif, tif->tif_diroff, L_SET);
dircount = nfields;
if (!WriteOK(tif, &dircount, sizeof (short))) {
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, &tif->tif_nextdiroff, sizeof (long))) {
TIFFError(tif->tif_name, "Error writing directory link");
goto bad;
}
TIFFFreeDirectory(tif);
_TIFFfree(data);
tif->tif_flags &= ~TIFF_DIRTYDIRECT;
/*
* Reset directory-related state for subsequent
* directories.
*/
TIFFDefaultDirectory(tif);
tif->tif_diroff = 0;
tif->tif_curoff = 0;
tif->tif_row = -1;
tif->tif_curstrip = -1;
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)
{
TIFFDirectory* td = &tif->tif_dir;
u_short wc = (u_short) fip->field_writecount;
dir->tdir_tag = fip->field_tag;
dir->tdir_type = (u_short)fip->field_type;
dir->tdir_count = wc;
#define WRITE(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(td, fip->field_tag, &wc, &wp);
dir->tdir_count = wc;
} else
_TIFFgetfield(td, fip->field_tag, &wp);
if (!WRITE(TIFFWriteShortArray, wp))
return (0);
} else {
uint16 sv;
_TIFFgetfield(td, 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(td, fip->field_tag, &wc, &lp);
dir->tdir_count = wc;
} else
_TIFFgetfield(td, fip->field_tag, &lp);
if (!WRITE(TIFFWriteLongArray, lp))
return (0);
} else {
/* XXX handle LONG->SHORT conversion */
_TIFFgetfield(td, 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(td, fip->field_tag, &wc, &fp);
dir->tdir_count = wc;
} else
_TIFFgetfield(td, fip->field_tag, &fp);
if (!WRITE(TIFFWriteRationalArray, fp))
return (0);
} else {
float fv;
_TIFFgetfield(td, fip->field_tag, &fv);
if (!TIFFWriteRational(tif, fip->field_type, fip->field_tag, dir, fv))
return (0);
}
break;
case TIFF_FLOAT:
if (wc > 1) {
float *fp;
if (wc == (u_short) TIFF_VARIABLE) {
_TIFFgetfield(td, fip->field_tag, &wc, &fp);
dir->tdir_count = wc;
} else
_TIFFgetfield(td, fip->field_tag, &fp);
if (!WRITE(TIFFWriteFloatArray, fp))
return (0);
} else {
float fv;
_TIFFgetfield(td, fip->field_tag, &fv);
TIFFCvtNativeToIEEEFloat(tif, 1, &fv);
/* XXX assumes sizeof (long) == sizeof (float) */
dir->tdir_offset = *(uint32*) &fv; /* XXX */
}
break;
case TIFF_ASCII: {
char *cp;
_TIFFgetfield(td, fip->field_tag, &cp);
if (!TIFFWriteString(tif, fip->field_tag, dir, cp))
return (0);
break;
}
}
return (1);
}
#undef WRITE
/*
* 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 = 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
/*
* 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));
}
#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->tif_dir, 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);
}
#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->tif_dir, 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 = tag;
dir->tdir_type = (short)TIFF_SHORT;
/* XXX -- yech, fool TIFFWriteData */
dir->tdir_count = 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);
}
/*
* Setup a directory entry of an ASCII string
* and write any associated indirect value.
*/
static int
TIFFWriteString(TIFF* tif, ttag_t tag, TIFFDirEntry* dir, char* cp)
{
dir->tdir_tag = tag;
dir->tdir_type = (short)TIFF_ASCII;
dir->tdir_count = strlen(cp) + 1; /* includes \0 byte */
if (dir->tdir_count > 4) {
if (!TIFFWriteData(tif, dir, cp))
return (0);
} else
memcpy(&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 = tag;
dir->tdir_type = (short)type;
dir->tdir_count = n;
if (n <= 2) {
if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
dir->tdir_offset = (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 = 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 = 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(tag)->field_name, v);
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] = 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 = 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));
}
#ifdef JPEG_SUPPORT
#define NITEMS(x) (sizeof (x) / sizeof (x[0]))
/*
* Setup a directory entry for JPEG Quantization
* tables and write the associated indirect values.
*/
static int
TIFFWriteJPEGQTables(TIFF* tif, TIFFDirEntry* dir)
{
int i, status = 0, samples = tif->tif_dir.td_samplesperpixel;
uint32 buf[10], *off = buf;
TIFFDirEntry tdir;
tdir.tdir_tag = TIFFTAG_JPEGQTABLES; /* for diagnostics */
tdir.tdir_type = (short)TIFF_BYTE;
tdir.tdir_count = 64;
if (samples > NITEMS(buf))
off = (uint32*)_TIFFmalloc(samples * sizeof (uint32));
for (i = 0; i < samples; i++) {
if (!TIFFWriteData(tif, &tdir, (char *)tif->tif_dir.td_qtab[i]))
goto bad;
off[i] = tdir.tdir_offset;
}
status = TIFFWriteLongArray(tif, TIFF_LONG,
TIFFTAG_JPEGQTABLES, dir, samples, off);
bad:
if (off != buf)
_TIFFfree((char*)off);
return (status);
}
/*
* Setup a directory entry for JPEG Coefficient
* tables and write the associated indirect values.
*/
static int
TIFFWriteJPEGCTables(TIFF* tif, ttag_t tag, TIFFDirEntry* dir, u_char** tab)
{
int status = 0, samples = tif->tif_dir.td_samplesperpixel;
uint32 buf[10], *off = buf;
TIFFDirEntry tdir;
int i, j, ncodes;
tdir.tdir_tag = tag; /* for diagnostics */
tdir.tdir_type = (short)TIFF_BYTE;
if (samples > NITEMS(buf))
off = (uint32*)_TIFFmalloc(samples * sizeof (uint32));
for (i = 0; i < samples; i++) {
for (ncodes = 0, j = 0; j < 16; j++)
ncodes += tab[i][j];
tdir.tdir_count = 16+ncodes;
if (!TIFFWriteData(tif, &tdir, (char *)tab[i]))
goto bad;
off[i] = tdir.tdir_offset;
}
status = TIFFWriteLongArray(tif, TIFF_LONG, tag, dir, samples, off);
bad:
if (off != buf)
_TIFFfree((char*)off);
return (status);
}
#undef NITEMS
#endif
#ifdef COLORIMETRY_SUPPORT
static int
TIFFWriteTransferFunction(TIFF* tif, TIFFDirEntry* dir)
{
TIFFDirectory* td = &tif->tif_dir;
uint32 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 (memcmp(tf[0], tf[2], n)) { ncols = 3; break; }
case 2: if (memcmp(tf[0], tf[1], n)) { ncols = 3; break; }
case 1: case 0: ncols = 1;
}
return (TIFFWriteShortTable(tif,
TIFFTAG_TRANSFERFUNCTION, dir, ncols, tf));
}
#endif
/*
* Write a contiguous directory item.
*/
static int
TIFFWriteData(TIFF* tif, TIFFDirEntry* dir, char* cp)
{
tsize_t cc;
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(dir->tdir_tag)->field_name);
return (0);
}
/*
* Link the current directory into the
* directory chain for the file.
*/
static int
TIFFLinkDirectory(TIFF* tif)
{
static const char module[] = "TIFFLinkDirectory";
uint16 dircount;
uint32 nextdir;
tif->tif_diroff = (TIFFSeekFile(tif, 0L, L_XTND)+1) &~ 1L;
if (tif->tif_header.tiff_diroff == 0) {
/*
* First directory, overwrite header.
*/
tif->tif_header.tiff_diroff = tif->tif_diroff;
(void) TIFFSeekFile(tif, 0L, L_SET);
if (!WriteOK(tif, &tif->tif_header,
sizeof (tif->tif_header))) {
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 {
if (!SeekOK(tif, nextdir) ||
!ReadOK(tif, &dircount, sizeof (uint16))) {
TIFFError(module, "Error fetching directory count");
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabShort(&dircount);
TIFFSeekFile(tif, dircount * sizeof (TIFFDirEntry), L_INCR);
if (!ReadOK(tif, &nextdir, sizeof (uint32))) {
TIFFError(module, "Error fetching directory link");
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&nextdir);
} while (nextdir != 0);
(void) TIFFSeekFile(tif, -sizeof (nextdir), L_INCR);
if (!WriteOK(tif, &tif->tif_diroff, sizeof (tif->tif_diroff))) {
TIFFError(module, "Error writing directory link");
return (0);
}
return (1);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.