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[wxWidgets.git] / src / tiff / tif_dirwrite.c
1 /* $Header$ */
2
3 /*
4 * Copyright (c) 1988-1997 Sam Leffler
5 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and
8 * its documentation for any purpose is hereby granted without fee, provided
9 * that (i) the above copyright notices and this permission notice appear in
10 * all copies of the software and related documentation, and (ii) the names of
11 * Sam Leffler and Silicon Graphics may not be used in any advertising or
12 * publicity relating to the software without the specific, prior written
13 * permission of Sam Leffler and Silicon Graphics.
14 *
15 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18 *
19 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 */
26
27 /*
28 * TIFF Library.
29 *
30 * Directory Write Support Routines.
31 */
32 #include "tiffiop.h"
33
34 #if HAVE_IEEEFP
35 #define TIFFCvtNativeToIEEEFloat(tif, n, fp)
36 #define TIFFCvtNativeToIEEEDouble(tif, n, dp)
37 #else
38 extern void TIFFCvtNativeToIEEEFloat(TIFF*, uint32, float*);
39 extern void TIFFCvtNativeToIEEEDouble(TIFF*, uint32, double*);
40 #endif
41
42 static int TIFFWriteNormalTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*);
43 static void TIFFSetupShortLong(TIFF*, ttag_t, TIFFDirEntry*, uint32);
44 static int TIFFSetupShortPair(TIFF*, ttag_t, TIFFDirEntry*);
45 static int TIFFWritePerSampleShorts(TIFF*, ttag_t, TIFFDirEntry*);
46 static int TIFFWritePerSampleAnys(TIFF*, TIFFDataType, ttag_t, TIFFDirEntry*);
47 static int TIFFWriteShortTable(TIFF*, ttag_t, TIFFDirEntry*, uint32, uint16**);
48 static int TIFFWriteShortArray(TIFF*,
49 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint16*);
50 static int TIFFWriteLongArray(TIFF *,
51 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint32*);
52 static int TIFFWriteRationalArray(TIFF *,
53 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
54 static int TIFFWriteFloatArray(TIFF *,
55 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
56 static int TIFFWriteDoubleArray(TIFF *,
57 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
58 static int TIFFWriteByteArray(TIFF*, TIFFDirEntry*, char*);
59 static int TIFFWriteAnyArray(TIFF*,
60 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
61 #ifdef COLORIMETRY_SUPPORT
62 static int TIFFWriteTransferFunction(TIFF*, TIFFDirEntry*);
63 #endif
64 #ifdef CMYK_SUPPORT
65 static int TIFFWriteInkNames(TIFF*, TIFFDirEntry*);
66 #endif
67 static int TIFFWriteData(TIFF*, TIFFDirEntry*, char*);
68 static int TIFFLinkDirectory(TIFF*);
69
70 #define WriteRationalPair(type, tag1, v1, tag2, v2) { \
71 if (!TIFFWriteRational(tif, type, tag1, dir, v1)) \
72 goto bad; \
73 if (!TIFFWriteRational(tif, type, tag2, dir+1, v2)) \
74 goto bad; \
75 dir++; \
76 }
77 #define TIFFWriteRational(tif, type, tag, dir, v) \
78 TIFFWriteRationalArray((tif), (type), (tag), (dir), 1, &(v))
79 #ifndef TIFFWriteRational
80 static int TIFFWriteRational(TIFF*,
81 TIFFDataType, ttag_t, TIFFDirEntry*, float);
82 #endif
83
84 /*
85 * Write the contents of the current directory
86 * to the specified file. This routine doesn't
87 * handle overwriting a directory with auxiliary
88 * storage that's been changed.
89 */
90 int
91 TIFFWriteDirectory(TIFF* tif)
92 {
93 uint16 dircount;
94 uint32 diroff;
95 ttag_t tag;
96 uint32 nfields;
97 tsize_t dirsize;
98 char* data;
99 TIFFDirEntry* dir;
100 TIFFDirectory* td;
101 u_long b, fields[FIELD_SETLONGS];
102 int fi, nfi;
103
104 if (tif->tif_mode == O_RDONLY)
105 return (1);
106 /*
107 * Clear write state so that subsequent images with
108 * different characteristics get the right buffers
109 * setup for them.
110 */
111 if (tif->tif_flags & TIFF_POSTENCODE) {
112 tif->tif_flags &= ~TIFF_POSTENCODE;
113 if (!(*tif->tif_postencode)(tif)) {
114 TIFFError(tif->tif_name,
115 "Error post-encoding before directory write");
116 return (0);
117 }
118 }
119 (*tif->tif_close)(tif); /* shutdown encoder */
120 /*
121 * Flush any data that might have been written
122 * by the compression close+cleanup routines.
123 */
124 if (tif->tif_rawcc > 0 && !TIFFFlushData1(tif)) {
125 TIFFError(tif->tif_name,
126 "Error flushing data before directory write");
127 return (0);
128 }
129 if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
130 _TIFFfree(tif->tif_rawdata);
131 tif->tif_rawdata = NULL;
132 tif->tif_rawcc = 0;
133 }
134 tif->tif_flags &= ~(TIFF_BEENWRITING|TIFF_BUFFERSETUP);
135
136 td = &tif->tif_dir;
137 /*
138 * Size the directory so that we can calculate
139 * offsets for the data items that aren't kept
140 * in-place in each field.
141 */
142 nfields = 0;
143 for (b = 0; b <= FIELD_LAST; b++)
144 if (TIFFFieldSet(tif, b))
145 nfields += (b < FIELD_SUBFILETYPE ? 2 : 1);
146 dirsize = nfields * sizeof (TIFFDirEntry);
147 data = (char*) _TIFFmalloc(dirsize);
148 if (data == NULL) {
149 TIFFError(tif->tif_name,
150 "Cannot write directory, out of space");
151 return (0);
152 }
153 /*
154 * Directory hasn't been placed yet, put
155 * it at the end of the file and link it
156 * into the existing directory structure.
157 */
158 if (tif->tif_diroff == 0 && !TIFFLinkDirectory(tif))
159 goto bad;
160 tif->tif_dataoff = (toff_t)(
161 tif->tif_diroff + sizeof (uint16) + dirsize + sizeof (toff_t));
162 if (tif->tif_dataoff & 1)
163 tif->tif_dataoff++;
164 (void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET);
165 tif->tif_curdir++;
166 dir = (TIFFDirEntry*) data;
167 /*
168 * Setup external form of directory
169 * entries and write data items.
170 */
171 _TIFFmemcpy(fields, td->td_fieldsset, sizeof (fields));
172 /*
173 * Write out ExtraSamples tag only if
174 * extra samples are present in the data.
175 */
176 if (FieldSet(fields, FIELD_EXTRASAMPLES) && !td->td_extrasamples) {
177 ResetFieldBit(fields, FIELD_EXTRASAMPLES);
178 nfields--;
179 dirsize -= sizeof (TIFFDirEntry);
180 } /*XXX*/
181 for (fi = 0, nfi = tif->tif_nfields; nfi > 0; nfi--, fi++) {
182 const TIFFFieldInfo* fip = tif->tif_fieldinfo[fi];
183 if (!FieldSet(fields, fip->field_bit))
184 continue;
185 switch (fip->field_bit) {
186 case FIELD_STRIPOFFSETS:
187 /*
188 * We use one field bit for both strip and tile
189 * offsets, and so must be careful in selecting
190 * the appropriate field descriptor (so that tags
191 * are written in sorted order).
192 */
193 tag = isTiled(tif) ?
194 TIFFTAG_TILEOFFSETS : TIFFTAG_STRIPOFFSETS;
195 if (tag != fip->field_tag)
196 continue;
197 if (!TIFFWriteLongArray(tif, TIFF_LONG, tag, dir,
198 (uint32) td->td_nstrips, td->td_stripoffset))
199 goto bad;
200 break;
201 case FIELD_STRIPBYTECOUNTS:
202 /*
203 * We use one field bit for both strip and tile
204 * byte counts, and so must be careful in selecting
205 * the appropriate field descriptor (so that tags
206 * are written in sorted order).
207 */
208 tag = isTiled(tif) ?
209 TIFFTAG_TILEBYTECOUNTS : TIFFTAG_STRIPBYTECOUNTS;
210 if (tag != fip->field_tag)
211 continue;
212 if (!TIFFWriteLongArray(tif, TIFF_LONG, tag, dir,
213 (uint32) td->td_nstrips, td->td_stripbytecount))
214 goto bad;
215 break;
216 case FIELD_ROWSPERSTRIP:
217 TIFFSetupShortLong(tif, TIFFTAG_ROWSPERSTRIP,
218 dir, td->td_rowsperstrip);
219 break;
220 case FIELD_COLORMAP:
221 if (!TIFFWriteShortTable(tif, TIFFTAG_COLORMAP, dir,
222 3, td->td_colormap))
223 goto bad;
224 break;
225 case FIELD_IMAGEDIMENSIONS:
226 TIFFSetupShortLong(tif, TIFFTAG_IMAGEWIDTH,
227 dir++, td->td_imagewidth);
228 TIFFSetupShortLong(tif, TIFFTAG_IMAGELENGTH,
229 dir, td->td_imagelength);
230 break;
231 case FIELD_TILEDIMENSIONS:
232 TIFFSetupShortLong(tif, TIFFTAG_TILEWIDTH,
233 dir++, td->td_tilewidth);
234 TIFFSetupShortLong(tif, TIFFTAG_TILELENGTH,
235 dir, td->td_tilelength);
236 break;
237 case FIELD_POSITION:
238 WriteRationalPair(TIFF_RATIONAL,
239 TIFFTAG_XPOSITION, td->td_xposition,
240 TIFFTAG_YPOSITION, td->td_yposition);
241 break;
242 case FIELD_RESOLUTION:
243 WriteRationalPair(TIFF_RATIONAL,
244 TIFFTAG_XRESOLUTION, td->td_xresolution,
245 TIFFTAG_YRESOLUTION, td->td_yresolution);
246 break;
247 case FIELD_BITSPERSAMPLE:
248 case FIELD_MINSAMPLEVALUE:
249 case FIELD_MAXSAMPLEVALUE:
250 case FIELD_SAMPLEFORMAT:
251 if (!TIFFWritePerSampleShorts(tif, fip->field_tag, dir))
252 goto bad;
253 break;
254 case FIELD_SMINSAMPLEVALUE:
255 case FIELD_SMAXSAMPLEVALUE:
256 if (!TIFFWritePerSampleAnys(tif,
257 _TIFFSampleToTagType(tif), fip->field_tag, dir))
258 goto bad;
259 break;
260 case FIELD_PAGENUMBER:
261 case FIELD_HALFTONEHINTS:
262 #ifdef YCBCR_SUPPORT
263 case FIELD_YCBCRSUBSAMPLING:
264 #endif
265 #ifdef CMYK_SUPPORT
266 case FIELD_DOTRANGE:
267 #endif
268 if (!TIFFSetupShortPair(tif, fip->field_tag, dir))
269 goto bad;
270 break;
271 #ifdef CMYK_SUPPORT
272 case FIELD_INKNAMES:
273 if (!TIFFWriteInkNames(tif, dir))
274 goto bad;
275 break;
276 #endif
277 #ifdef COLORIMETRY_SUPPORT
278 case FIELD_TRANSFERFUNCTION:
279 if (!TIFFWriteTransferFunction(tif, dir))
280 goto bad;
281 break;
282 #endif
283 #if SUBIFD_SUPPORT
284 case FIELD_SUBIFD:
285 if (!TIFFWriteNormalTag(tif, dir, fip))
286 goto bad;
287 /*
288 * Total hack: if this directory includes a SubIFD
289 * tag then force the next <n> directories to be
290 * written as ``sub directories'' of this one. This
291 * is used to write things like thumbnails and
292 * image masks that one wants to keep out of the
293 * normal directory linkage access mechanism.
294 */
295 if (dir->tdir_count > 0) {
296 tif->tif_flags |= TIFF_INSUBIFD;
297 tif->tif_nsubifd = dir->tdir_count;
298 if (dir->tdir_count > 1)
299 tif->tif_subifdoff = dir->tdir_offset;
300 else
301 tif->tif_subifdoff = (uint32)(
302 tif->tif_diroff
303 + sizeof (uint16)
304 + ((char*)&dir->tdir_offset-data));
305 }
306 break;
307 #endif
308 default:
309 if (!TIFFWriteNormalTag(tif, dir, fip))
310 goto bad;
311 break;
312 }
313 dir++;
314 ResetFieldBit(fields, fip->field_bit);
315 }
316 /*
317 * Write directory.
318 */
319 dircount = (uint16) nfields;
320 diroff = (uint32) tif->tif_nextdiroff;
321 if (tif->tif_flags & TIFF_SWAB) {
322 /*
323 * The file's byte order is opposite to the
324 * native machine architecture. We overwrite
325 * the directory information with impunity
326 * because it'll be released below after we
327 * write it to the file. Note that all the
328 * other tag construction routines assume that
329 * we do this byte-swapping; i.e. they only
330 * byte-swap indirect data.
331 */
332 for (dir = (TIFFDirEntry*) data; dircount; dir++, dircount--) {
333 TIFFSwabArrayOfShort(&dir->tdir_tag, 2);
334 TIFFSwabArrayOfLong(&dir->tdir_count, 2);
335 }
336 dircount = (uint16) nfields;
337 TIFFSwabShort(&dircount);
338 TIFFSwabLong(&diroff);
339 }
340 (void) TIFFSeekFile(tif, tif->tif_diroff, SEEK_SET);
341 if (!WriteOK(tif, &dircount, sizeof (dircount))) {
342 TIFFError(tif->tif_name, "Error writing directory count");
343 goto bad;
344 }
345 if (!WriteOK(tif, data, dirsize)) {
346 TIFFError(tif->tif_name, "Error writing directory contents");
347 goto bad;
348 }
349 if (!WriteOK(tif, &diroff, sizeof (diroff))) {
350 TIFFError(tif->tif_name, "Error writing directory link");
351 goto bad;
352 }
353 TIFFFreeDirectory(tif);
354 _TIFFfree(data);
355 tif->tif_flags &= ~TIFF_DIRTYDIRECT;
356 (*tif->tif_cleanup)(tif);
357
358 /*
359 * Reset directory-related state for subsequent
360 * directories.
361 */
362 TIFFDefaultDirectory(tif);
363 tif->tif_diroff = 0;
364 tif->tif_curoff = 0;
365 tif->tif_row = (uint32) -1;
366 tif->tif_curstrip = (tstrip_t) -1;
367 return (1);
368 bad:
369 _TIFFfree(data);
370 return (0);
371 }
372 #undef WriteRationalPair
373
374 /*
375 * Process tags that are not special cased.
376 */
377 static int
378 TIFFWriteNormalTag(TIFF* tif, TIFFDirEntry* dir, const TIFFFieldInfo* fip)
379 {
380 u_short wc = (u_short) fip->field_writecount;
381 uint32 wc2;
382
383 dir->tdir_tag = fip->field_tag;
384 dir->tdir_type = (u_short) fip->field_type;
385 dir->tdir_count = wc;
386 #define WRITEF(x,y) x(tif, fip->field_type, fip->field_tag, dir, wc, y)
387 switch (fip->field_type) {
388 case TIFF_SHORT:
389 case TIFF_SSHORT:
390 if (wc > 1) {
391 uint16* wp;
392 if (wc == (u_short) TIFF_VARIABLE)
393 TIFFGetField(tif, fip->field_tag, &wc, &wp);
394 else
395 TIFFGetField(tif, fip->field_tag, &wp);
396 if (!WRITEF(TIFFWriteShortArray, wp))
397 return (0);
398 } else {
399 uint16 sv;
400 TIFFGetField(tif, fip->field_tag, &sv);
401 dir->tdir_offset =
402 TIFFInsertData(tif, dir->tdir_type, sv);
403 }
404 break;
405 case TIFF_LONG:
406 case TIFF_SLONG:
407 if (wc > 1) {
408 uint32* lp;
409 if (wc == (u_short) TIFF_VARIABLE)
410 TIFFGetField(tif, fip->field_tag, &wc, &lp);
411 else
412 TIFFGetField(tif, fip->field_tag, &lp);
413 if (!WRITEF(TIFFWriteLongArray, lp))
414 return (0);
415 } else {
416 /* XXX handle LONG->SHORT conversion */
417 TIFFGetField(tif, fip->field_tag, &dir->tdir_offset);
418 }
419 break;
420 case TIFF_RATIONAL:
421 case TIFF_SRATIONAL:
422 if (wc > 1) {
423 float* fp;
424 if (wc == (u_short) TIFF_VARIABLE)
425 TIFFGetField(tif, fip->field_tag, &wc, &fp);
426 else
427 TIFFGetField(tif, fip->field_tag, &fp);
428 if (!WRITEF(TIFFWriteRationalArray, fp))
429 return (0);
430 } else {
431 float fv;
432 TIFFGetField(tif, fip->field_tag, &fv);
433 if (!WRITEF(TIFFWriteRationalArray, &fv))
434 return (0);
435 }
436 break;
437 case TIFF_FLOAT:
438 if (wc > 1) {
439 float* fp;
440 if (wc == (u_short) TIFF_VARIABLE)
441 TIFFGetField(tif, fip->field_tag, &wc, &fp);
442 else
443 TIFFGetField(tif, fip->field_tag, &fp);
444 if (!WRITEF(TIFFWriteFloatArray, fp))
445 return (0);
446 } else {
447 float fv;
448 TIFFGetField(tif, fip->field_tag, &fv);
449 if (!WRITEF(TIFFWriteFloatArray, &fv))
450 return (0);
451 }
452 break;
453 case TIFF_DOUBLE:
454 if (wc > 1) {
455 double* dp;
456 if (wc == (u_short) TIFF_VARIABLE)
457 TIFFGetField(tif, fip->field_tag, &wc, &dp);
458 else
459 TIFFGetField(tif, fip->field_tag, &dp);
460 if (!WRITEF(TIFFWriteDoubleArray, dp))
461 return (0);
462 } else {
463 double dv;
464 TIFFGetField(tif, fip->field_tag, &dv);
465 if (!WRITEF(TIFFWriteDoubleArray, &dv))
466 return (0);
467 }
468 break;
469 case TIFF_ASCII:
470 { char* cp;
471 TIFFGetField(tif, fip->field_tag, &cp);
472 dir->tdir_count = (uint32) (strlen(cp) + 1);
473 if (!TIFFWriteByteArray(tif, dir, cp))
474 return (0);
475 }
476 break;
477
478 /* added based on patch request from MARTIN.MCBRIDE.MM@agfa.co.uk,
479 correctness not verified (FW, 99/08) */
480 case TIFF_BYTE:
481 case TIFF_SBYTE:
482 if (wc > 1) {
483 char* cp;
484 if (wc == (u_short) TIFF_VARIABLE) {
485 TIFFGetField(tif, fip->field_tag, &wc, &cp);
486 dir->tdir_count = wc;
487 } else
488 TIFFGetField(tif, fip->field_tag, &cp);
489 if (!TIFFWriteByteArray(tif, dir, cp))
490 return (0);
491 } else {
492 char cv;
493 TIFFGetField(tif, fip->field_tag, &cv);
494 if (!TIFFWriteByteArray(tif, dir, &cv))
495 return (0);
496 }
497 break;
498
499 case TIFF_UNDEFINED:
500 { char* cp;
501 if (wc == (u_short) TIFF_VARIABLE) {
502 TIFFGetField(tif, fip->field_tag, &wc, &cp);
503 dir->tdir_count = wc;
504 } else if (wc == (u_short) TIFF_VARIABLE2) {
505 TIFFGetField(tif, fip->field_tag, &wc2, &cp);
506 dir->tdir_count = wc2;
507 } else
508 TIFFGetField(tif, fip->field_tag, &cp);
509 if (!TIFFWriteByteArray(tif, dir, cp))
510 return (0);
511 }
512 break;
513
514 case TIFF_NOTYPE:
515 break;
516 }
517 return (1);
518 }
519 #undef WRITEF
520
521 /*
522 * Setup a directory entry with either a SHORT
523 * or LONG type according to the value.
524 */
525 static void
526 TIFFSetupShortLong(TIFF* tif, ttag_t tag, TIFFDirEntry* dir, uint32 v)
527 {
528 dir->tdir_tag = tag;
529 dir->tdir_count = 1;
530 if (v > 0xffffL) {
531 dir->tdir_type = (short) TIFF_LONG;
532 dir->tdir_offset = v;
533 } else {
534 dir->tdir_type = (short) TIFF_SHORT;
535 dir->tdir_offset = TIFFInsertData(tif, (int) TIFF_SHORT, v);
536 }
537 }
538 #undef MakeShortDirent
539
540 #ifndef TIFFWriteRational
541 /*
542 * Setup a RATIONAL directory entry and
543 * write the associated indirect value.
544 */
545 static int
546 TIFFWriteRational(TIFF* tif,
547 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, float v)
548 {
549 return (TIFFWriteRationalArray(tif, type, tag, dir, 1, &v));
550 }
551 #endif
552
553 #define NITEMS(x) (sizeof (x) / sizeof (x[0]))
554 /*
555 * Setup a directory entry that references a
556 * samples/pixel array of SHORT values and
557 * (potentially) write the associated indirect
558 * values.
559 */
560 static int
561 TIFFWritePerSampleShorts(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
562 {
563 uint16 buf[10], v;
564 uint16* w = buf;
565 int i, status, samples = tif->tif_dir.td_samplesperpixel;
566
567 if (samples > NITEMS(buf))
568 w = (uint16*) _TIFFmalloc(samples * sizeof (uint16));
569 TIFFGetField(tif, tag, &v);
570 for (i = 0; i < samples; i++)
571 w[i] = v;
572 status = TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, samples, w);
573 if (w != buf)
574 _TIFFfree((char*) w);
575 return (status);
576 }
577
578 /*
579 * Setup a directory entry that references a samples/pixel array of ``type''
580 * values and (potentially) write the associated indirect values. The source
581 * data from TIFFGetField() for the specified tag must be returned as double.
582 */
583 static int
584 TIFFWritePerSampleAnys(TIFF* tif,
585 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir)
586 {
587 double buf[10], v;
588 double* w = buf;
589 int i, status;
590 int samples = (int) tif->tif_dir.td_samplesperpixel;
591
592 if (samples > NITEMS(buf))
593 w = (double*) _TIFFmalloc(samples * sizeof (double));
594 TIFFGetField(tif, tag, &v);
595 for (i = 0; i < samples; i++)
596 w[i] = v;
597 status = TIFFWriteAnyArray(tif, type, tag, dir, samples, w);
598 if (w != buf)
599 _TIFFfree(w);
600 return (status);
601 }
602 #undef NITEMS
603
604 /*
605 * Setup a pair of shorts that are returned by
606 * value, rather than as a reference to an array.
607 */
608 static int
609 TIFFSetupShortPair(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
610 {
611 uint16 v[2];
612
613 TIFFGetField(tif, tag, &v[0], &v[1]);
614 return (TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, 2, v));
615 }
616
617 /*
618 * Setup a directory entry for an NxM table of shorts,
619 * where M is known to be 2**bitspersample, and write
620 * the associated indirect data.
621 */
622 static int
623 TIFFWriteShortTable(TIFF* tif,
624 ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16** table)
625 {
626 uint32 i, off;
627
628 dir->tdir_tag = tag;
629 dir->tdir_type = (short) TIFF_SHORT;
630 /* XXX -- yech, fool TIFFWriteData */
631 dir->tdir_count = (uint32) (1L<<tif->tif_dir.td_bitspersample);
632 off = tif->tif_dataoff;
633 for (i = 0; i < n; i++)
634 if (!TIFFWriteData(tif, dir, (char *)table[i]))
635 return (0);
636 dir->tdir_count *= n;
637 dir->tdir_offset = off;
638 return (1);
639 }
640
641 /*
642 * Write/copy data associated with an ASCII or opaque tag value.
643 */
644 static int
645 TIFFWriteByteArray(TIFF* tif, TIFFDirEntry* dir, char* cp)
646 {
647 if (dir->tdir_count > 4) {
648 if (!TIFFWriteData(tif, dir, cp))
649 return (0);
650 } else
651 _TIFFmemcpy(&dir->tdir_offset, cp, dir->tdir_count);
652 return (1);
653 }
654
655 /*
656 * Setup a directory entry of an array of SHORT
657 * or SSHORT and write the associated indirect values.
658 */
659 static int
660 TIFFWriteShortArray(TIFF* tif,
661 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16* v)
662 {
663 dir->tdir_tag = tag;
664 dir->tdir_type = (short) type;
665 dir->tdir_count = n;
666 if (n <= 2) {
667 if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
668 dir->tdir_offset = (uint32) ((long) v[0] << 16);
669 if (n == 2)
670 dir->tdir_offset |= v[1] & 0xffff;
671 } else {
672 dir->tdir_offset = v[0] & 0xffff;
673 if (n == 2)
674 dir->tdir_offset |= (long) v[1] << 16;
675 }
676 return (1);
677 } else
678 return (TIFFWriteData(tif, dir, (char*) v));
679 }
680
681 /*
682 * Setup a directory entry of an array of LONG
683 * or SLONG and write the associated indirect values.
684 */
685 static int
686 TIFFWriteLongArray(TIFF* tif,
687 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint32* v)
688 {
689 dir->tdir_tag = tag;
690 dir->tdir_type = (short) type;
691 dir->tdir_count = n;
692 if (n == 1) {
693 dir->tdir_offset = v[0];
694 return (1);
695 } else
696 return (TIFFWriteData(tif, dir, (char*) v));
697 }
698
699 /*
700 * Setup a directory entry of an array of RATIONAL
701 * or SRATIONAL and write the associated indirect values.
702 */
703 static int
704 TIFFWriteRationalArray(TIFF* tif,
705 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
706 {
707 uint32 i;
708 uint32* t;
709 int status;
710
711 dir->tdir_tag = tag;
712 dir->tdir_type = (short) type;
713 dir->tdir_count = n;
714 t = (uint32*) _TIFFmalloc(2*n * sizeof (uint32));
715 for (i = 0; i < n; i++) {
716 float fv = v[i];
717 int sign = 1;
718 uint32 den;
719
720 if (fv < 0) {
721 if (type == TIFF_RATIONAL) {
722 TIFFWarning(tif->tif_name,
723 "\"%s\": Information lost writing value (%g) as (unsigned) RATIONAL",
724 _TIFFFieldWithTag(tif,tag)->field_name, fv);
725 fv = 0;
726 } else
727 fv = -fv, sign = -1;
728 }
729 den = 1L;
730 if (fv > 0) {
731 while (fv < 1L<<(31-3) && den < 1L<<(31-3))
732 fv *= 1<<3, den *= 1L<<3;
733 }
734 t[2*i+0] = sign * (fv + 0.5);
735 t[2*i+1] = den;
736 }
737 status = TIFFWriteData(tif, dir, (char *)t);
738 _TIFFfree((char*) t);
739 return (status);
740 }
741
742 static int
743 TIFFWriteFloatArray(TIFF* tif,
744 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
745 {
746 dir->tdir_tag = tag;
747 dir->tdir_type = (short) type;
748 dir->tdir_count = n;
749 TIFFCvtNativeToIEEEFloat(tif, n, v);
750 if (n == 1) {
751 dir->tdir_offset = *(uint32*) &v[0];
752 return (1);
753 } else
754 return (TIFFWriteData(tif, dir, (char*) v));
755 }
756
757 static int
758 TIFFWriteDoubleArray(TIFF* tif,
759 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
760 {
761 dir->tdir_tag = tag;
762 dir->tdir_type = (short) type;
763 dir->tdir_count = n;
764 TIFFCvtNativeToIEEEDouble(tif, n, v);
765 return (TIFFWriteData(tif, dir, (char*) v));
766 }
767
768 /*
769 * Write an array of ``type'' values for a specified tag (i.e. this is a tag
770 * which is allowed to have different types, e.g. SMaxSampleType).
771 * Internally the data values are represented as double since a double can
772 * hold any of the TIFF tag types (yes, this should really be an abstract
773 * type tany_t for portability). The data is converted into the specified
774 * type in a temporary buffer and then handed off to the appropriate array
775 * writer.
776 */
777 static int
778 TIFFWriteAnyArray(TIFF* tif,
779 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
780 {
781 char buf[10 * sizeof(double)];
782 char* w = buf;
783 int i, status = 0;
784
785 if (n * tiffDataWidth[type] > sizeof buf)
786 w = (char*) _TIFFmalloc(n * tiffDataWidth[type]);
787 switch (type) {
788 case TIFF_BYTE:
789 { uint8* bp = (uint8*) w;
790 for (i = 0; i < n; i++)
791 bp[i] = (uint8) v[i];
792 dir->tdir_tag = tag;
793 dir->tdir_type = (short) type;
794 dir->tdir_count = n;
795 if (!TIFFWriteByteArray(tif, dir, (char*) bp))
796 goto out;
797 }
798 break;
799 case TIFF_SBYTE:
800 { int8* bp = (int8*) w;
801 for (i = 0; i < n; i++)
802 bp[i] = (int8) v[i];
803 dir->tdir_tag = tag;
804 dir->tdir_type = (short) type;
805 dir->tdir_count = n;
806 if (!TIFFWriteByteArray(tif, dir, (char*) bp))
807 goto out;
808 }
809 break;
810 case TIFF_SHORT:
811 { uint16* bp = (uint16*) w;
812 for (i = 0; i < n; i++)
813 bp[i] = (uint16) v[i];
814 if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
815 goto out;
816 }
817 break;
818 case TIFF_SSHORT:
819 { int16* bp = (int16*) w;
820 for (i = 0; i < n; i++)
821 bp[i] = (int16) v[i];
822 if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
823 goto out;
824 }
825 break;
826 case TIFF_LONG:
827 { uint32* bp = (uint32*) w;
828 for (i = 0; i < n; i++)
829 bp[i] = (uint32) v[i];
830 if (!TIFFWriteLongArray(tif, type, tag, dir, n, bp))
831 goto out;
832 }
833 break;
834 case TIFF_SLONG:
835 { int32* bp = (int32*) w;
836 for (i = 0; i < n; i++)
837 bp[i] = (int32) v[i];
838 if (!TIFFWriteLongArray(tif, type, tag, dir, n, (uint32*) bp))
839 goto out;
840 }
841 break;
842 case TIFF_FLOAT:
843 { float* bp = (float*) w;
844 for (i = 0; i < n; i++)
845 bp[i] = (float) v[i];
846 if (!TIFFWriteFloatArray(tif, type, tag, dir, n, bp))
847 goto out;
848 }
849 break;
850 case TIFF_DOUBLE:
851 return (TIFFWriteDoubleArray(tif, type, tag, dir, n, v));
852 default:
853 /* TIFF_NOTYPE */
854 /* TIFF_ASCII */
855 /* TIFF_UNDEFINED */
856 /* TIFF_RATIONAL */
857 /* TIFF_SRATIONAL */
858 goto out;
859 }
860 status = 1;
861 out:
862 if (w != buf)
863 _TIFFfree(w);
864 return (status);
865 }
866
867 #ifdef COLORIMETRY_SUPPORT
868 static int
869 TIFFWriteTransferFunction(TIFF* tif, TIFFDirEntry* dir)
870 {
871 TIFFDirectory* td = &tif->tif_dir;
872 tsize_t n = (1L<<td->td_bitspersample) * sizeof (uint16);
873 uint16** tf = td->td_transferfunction;
874 int ncols;
875
876 /*
877 * Check if the table can be written as a single column,
878 * or if it must be written as 3 columns. Note that we
879 * write a 3-column tag if there are 2 samples/pixel and
880 * a single column of data won't suffice--hmm.
881 */
882 switch (td->td_samplesperpixel - td->td_extrasamples) {
883 default: if (_TIFFmemcmp(tf[0], tf[2], n)) { ncols = 3; break; }
884 case 2: if (_TIFFmemcmp(tf[0], tf[1], n)) { ncols = 3; break; }
885 case 1: case 0: ncols = 1;
886 }
887 return (TIFFWriteShortTable(tif,
888 TIFFTAG_TRANSFERFUNCTION, dir, ncols, tf));
889 }
890 #endif
891
892 #ifdef CMYK_SUPPORT
893 static int
894 TIFFWriteInkNames(TIFF* tif, TIFFDirEntry* dir)
895 {
896 TIFFDirectory* td = &tif->tif_dir;
897
898 dir->tdir_tag = TIFFTAG_INKNAMES;
899 dir->tdir_type = (short) TIFF_ASCII;
900 dir->tdir_count = td->td_inknameslen;
901 return (TIFFWriteByteArray(tif, dir, td->td_inknames));
902 }
903 #endif
904
905 /*
906 * Write a contiguous directory item.
907 */
908 static int
909 TIFFWriteData(TIFF* tif, TIFFDirEntry* dir, char* cp)
910 {
911 tsize_t cc;
912
913 if (tif->tif_flags & TIFF_SWAB) {
914 switch (dir->tdir_type) {
915 case TIFF_SHORT:
916 case TIFF_SSHORT:
917 TIFFSwabArrayOfShort((uint16*) cp, dir->tdir_count);
918 break;
919 case TIFF_LONG:
920 case TIFF_SLONG:
921 case TIFF_FLOAT:
922 TIFFSwabArrayOfLong((uint32*) cp, dir->tdir_count);
923 break;
924 case TIFF_RATIONAL:
925 case TIFF_SRATIONAL:
926 TIFFSwabArrayOfLong((uint32*) cp, 2*dir->tdir_count);
927 break;
928 case TIFF_DOUBLE:
929 TIFFSwabArrayOfDouble((double*) cp, dir->tdir_count);
930 break;
931 }
932 }
933 dir->tdir_offset = tif->tif_dataoff;
934 cc = dir->tdir_count * tiffDataWidth[dir->tdir_type];
935 if (SeekOK(tif, dir->tdir_offset) &&
936 WriteOK(tif, cp, cc)) {
937 tif->tif_dataoff += (cc + 1) & ~1;
938 return (1);
939 }
940 TIFFError(tif->tif_name, "Error writing data for field \"%s\"",
941 _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
942 return (0);
943 }
944
945 /*
946 * Link the current directory into the
947 * directory chain for the file.
948 */
949 static int
950 TIFFLinkDirectory(TIFF* tif)
951 {
952 static const char module[] = "TIFFLinkDirectory";
953 uint32 nextdir;
954 uint32 diroff;
955
956 tif->tif_diroff = (TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;
957 diroff = (uint32) tif->tif_diroff;
958 if (tif->tif_flags & TIFF_SWAB)
959 TIFFSwabLong(&diroff);
960 #if SUBIFD_SUPPORT
961 if (tif->tif_flags & TIFF_INSUBIFD) {
962 (void) TIFFSeekFile(tif, tif->tif_subifdoff, SEEK_SET);
963 if (!WriteOK(tif, &diroff, sizeof (diroff))) {
964 TIFFError(module,
965 "%s: Error writing SubIFD directory link",
966 tif->tif_name);
967 return (0);
968 }
969 /*
970 * Advance to the next SubIFD or, if this is
971 * the last one configured, revert back to the
972 * normal directory linkage.
973 */
974 if (--tif->tif_nsubifd)
975 tif->tif_subifdoff += sizeof (diroff);
976 else
977 tif->tif_flags &= ~TIFF_INSUBIFD;
978 return (1);
979 }
980 #endif
981 if (tif->tif_header.tiff_diroff == 0) {
982 /*
983 * First directory, overwrite offset in header.
984 */
985 tif->tif_header.tiff_diroff = (uint32) tif->tif_diroff;
986 #define HDROFF(f) ((toff_t) &(((TIFFHeader*) 0)->f))
987 (void) TIFFSeekFile(tif, HDROFF(tiff_diroff), SEEK_SET);
988 if (!WriteOK(tif, &diroff, sizeof (diroff))) {
989 TIFFError(tif->tif_name, "Error writing TIFF header");
990 return (0);
991 }
992 return (1);
993 }
994 /*
995 * Not the first directory, search to the last and append.
996 */
997 nextdir = tif->tif_header.tiff_diroff;
998 do {
999 uint16 dircount;
1000
1001 if (!SeekOK(tif, nextdir) ||
1002 !ReadOK(tif, &dircount, sizeof (dircount))) {
1003 TIFFError(module, "Error fetching directory count");
1004 return (0);
1005 }
1006 if (tif->tif_flags & TIFF_SWAB)
1007 TIFFSwabShort(&dircount);
1008 (void) TIFFSeekFile(tif,
1009 dircount * sizeof (TIFFDirEntry), SEEK_CUR);
1010 if (!ReadOK(tif, &nextdir, sizeof (nextdir))) {
1011 TIFFError(module, "Error fetching directory link");
1012 return (0);
1013 }
1014 if (tif->tif_flags & TIFF_SWAB)
1015 TIFFSwabLong(&nextdir);
1016 } while (nextdir != 0);
1017 (void) TIFFSeekFile(tif, -(toff_t) sizeof (nextdir), SEEK_CUR);
1018 if (!WriteOK(tif, &diroff, sizeof (diroff))) {
1019 TIFFError(module, "Error writing directory link");
1020 return (0);
1021 }
1022 return (1);
1023 }
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