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- #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);
- }
-