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fix bug with adding entries to a root group containing only subgroups (as shown by...
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1/* $Header: /cvs/maptools/cvsroot/libtiff/contrib/pds/tif_pdsdirwrite.c,v 1.3 2005/12/21 12:23:13 joris Exp $ */
2
3/* When writing data to TIFF files, it is often useful to store application-
4 specific data in a private TIFF directory so that the tags don't need to
5 be registered and won't conflict with other people's user-defined tags.
6 One needs to have a registered public tag which contains some amount of
7 raw data. That raw data, however, is interpreted at an independent,
8 separate, private tiff directory. This file provides some routines which
9 will be useful for converting that data from its raw binary form into
10 the proper form for your application.
11*/
12
13/*
14 * Copyright (c) 1988-1996 Sam Leffler
15 * Copyright (c) 1991-1996 Silicon Graphics, Inc.
16 * Copyright (c( 1996 USAF Phillips Laboratory
17 *
18 * Permission to use, copy, modify, distribute, and sell this software and
19 * its documentation for any purpose is hereby granted without fee, provided
20 * that (i) the above copyright notices and this permission notice appear in
21 * all copies of the software and related documentation, and (ii) the names of
22 * Sam Leffler and Silicon Graphics may not be used in any advertising or
23 * publicity relating to the software without the specific, prior written
24 * permission of Sam Leffler and Silicon Graphics.
25 *
26 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
28 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
29 *
30 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
31 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
32 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
33 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
34 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
35 * OF THIS SOFTWARE.
36 */
37
38/*
39 * TIFF Library.
40 *
41 * These routines written by Conrad J. Poelman on a single late-night of
42 * March 20-21, 1996.
43 *
44 * The entire purpose of this file is to provide a single external function,
45 * TIFFWritePrivateDataSubDirectory(). This function is intended for use
46 * in writing a private subdirectory structure into a TIFF file. The
47 * actual reading of data from the structure is handled by the getFieldFn(),
48 * which is passed to TIFFWritePrivateDataSubDirectory() as a parameter. The
49 * idea is to enable any application wishing to read private subdirectories to
50 * do so easily using this function, without modifying the TIFF library.
51 *
52 * The astute observer will notice that only two functions are at all different
53 * from the original tif_dirwrite.c file: TIFFWritePrivateDataSubDirectory()and
54 * TIFFWriteNormalSubTag(). All the other stuff that makes this file so huge
55 * is only necessary because all of those functions are declared static in
56 * tif_dirwrite.c, so we have to totally duplicate them in order to use them.
57 *
58 * Oh, also please note the bug-fix in the routine TIFFWriteNormalSubTag(),
59 * which equally should be applied to TIFFWriteNormalTag().
60 *
61 */
62#include "tiffiop.h"
63
64#if HAVE_IEEEFP
65#define TIFFCvtNativeToIEEEFloat(tif, n, fp)
66#define TIFFCvtNativeToIEEEDouble(tif, n, dp)
67#else
68extern void TIFFCvtNativeToIEEEFloat(TIFF*, uint32, float*);
69extern void TIFFCvtNativeToIEEEDouble(TIFF*, uint32, double*);
70#endif
71
72static int TIFFWriteNormalTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*);
73static int TIFFWriteNormalSubTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*,
74 int (*getFieldFn)(TIFF *tif,ttag_t tag,...));
75static void TIFFSetupShortLong(TIFF*, ttag_t, TIFFDirEntry*, uint32);
76static int TIFFSetupShortPair(TIFF*, ttag_t, TIFFDirEntry*);
77static int TIFFWritePerSampleShorts(TIFF*, ttag_t, TIFFDirEntry*);
78static int TIFFWritePerSampleAnys(TIFF*, TIFFDataType, ttag_t, TIFFDirEntry*);
79static int TIFFWriteShortTable(TIFF*, ttag_t, TIFFDirEntry*, uint32, uint16**);
80static int TIFFWriteShortArray(TIFF*,
81 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint16*);
82static int TIFFWriteLongArray(TIFF *,
83 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint32*);
84static int TIFFWriteRationalArray(TIFF *,
85 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
86static int TIFFWriteFloatArray(TIFF *,
87 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
88static int TIFFWriteDoubleArray(TIFF *,
89 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
90static int TIFFWriteByteArray(TIFF*, TIFFDirEntry*, char*);
91static int TIFFWriteAnyArray(TIFF*,
92 TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
93#ifdef COLORIMETRY_SUPPORT
94static int TIFFWriteTransferFunction(TIFF*, TIFFDirEntry*);
95#endif
96static int TIFFWriteData(TIFF*, TIFFDirEntry*, char*);
97static int TIFFLinkDirectory(TIFF*);
98
99#define WriteRationalPair(type, tag1, v1, tag2, v2) { \
100 if (!TIFFWriteRational(tif, type, tag1, dir, v1)) \
101 goto bad; \
102 if (!TIFFWriteRational(tif, type, tag2, dir+1, v2)) \
103 goto bad; \
104 dir++; \
105}
106#define TIFFWriteRational(tif, type, tag, dir, v) \
107 TIFFWriteRationalArray((tif), (type), (tag), (dir), 1, &(v))
108#ifndef TIFFWriteRational
109static int TIFFWriteRational(TIFF*,
110 TIFFDataType, ttag_t, TIFFDirEntry*, float);
111#endif
112
113/* This function will write an entire directory to the disk, and return the
114 offset value indicating where in the file it wrote the beginning of the
115 directory structure. This is NOT the same as the offset value before
116 calling this function, because some of the fields may have caused various
117 data items to be written out BEFORE writing the directory structure.
118
119 This code was basically written by ripping of the TIFFWriteDirectory()
120 code and generalizing it, using RPS's TIFFWritePliIfd() code for
121 inspiration. My original goal was to make this code general enough that
122 the original TIFFWriteDirectory() could be rewritten to just call this
123 function with the appropriate field and field-accessing arguments.
124
125 However, now I realize that there's a lot of code that gets executed for
126 the main, standard TIFF directories that does not apply to special
127 private subdirectories, so such a reimplementation for the sake of
128 eliminating redundant or duplicate code is probably not possible,
129 unless we also pass in a Main flag to indiciate which type of handling
130 to do, which would be kind of a hack. I've marked those places where I
131 changed or ripped out code which would have to be re-inserted to
132 generalize this function. If it can be done in a clean and graceful way,
133 it would be a great way to generalize the TIFF library. Otherwise, I'll
134 just leave this code here where it duplicates but remains on top of and
135 hopefully mostly independent of the main TIFF library.
136
137 The caller will probably want to free the sub directory structure after
138 returning from this call, since otherwise once written out, the user
139 is likely to forget about it and leave data lying around.
140*/
141toff_t
142TIFFWritePrivateDataSubDirectory(TIFF* tif,
143 uint32 pdir_fieldsset[], int pdir_fields_last,
144 TIFFFieldInfo *field_info,
145 int (*getFieldFn)(TIFF *tif, ttag_t tag, ...))
146{
147 uint16 dircount;
148 uint32 diroff, nextdiroff;
149 ttag_t tag;
150 uint32 nfields;
151 tsize_t dirsize;
152 char* data;
153 TIFFDirEntry* dir;
154 u_long b, *fields, fields_size;
155 toff_t directory_offset;
156 TIFFFieldInfo* fip;
157
158 /*
159 * Deleted out all of the encoder flushing and such code from here -
160 * not necessary for subdirectories.
161 */
162
163 /* Finish writing out any image data. */
164 TIFFFlushData(tif);
165
166 /*
167 * Size the directory so that we can calculate
168 * offsets for the data items that aren't kept
169 * in-place in each field.
170 */
171 nfields = 0;
172 for (b = 0; b <= pdir_fields_last; b++)
173 if (FieldSet(pdir_fieldsset, b))
174 /* Deleted code to make size of first 4 tags 2
175 instead of 1. */
176 nfields += 1;
177 dirsize = nfields * sizeof (TIFFDirEntry);
178 data = (char*) _TIFFmalloc(dirsize);
179 if (data == NULL) {
180 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
181 "Cannot write private subdirectory, out of space");
182 return (0);
183 }
184 /*
185 * Place directory in data section of the file. If there isn't one
186 * yet, place it at the end of the file. The directory is treated as
187 * data, so we don't link it into the directory structure at all.
188 */
189 if (tif->tif_dataoff == 0)
190 tif->tif_dataoff =(TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;
191 diroff = tif->tif_dataoff;
192 tif->tif_dataoff = (toff_t)(
193 diroff + sizeof (uint16) + dirsize + sizeof (toff_t));
194 if (tif->tif_dataoff & 1)
195 tif->tif_dataoff++;
196 (void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET);
197 /*tif->tif_curdir++;*/
198 dir = (TIFFDirEntry*) data;
199 /*
200 * Setup external form of directory
201 * entries and write data items.
202 */
203 /*
204 * We make a local copy of the fieldsset here so that we don't mess
205 * up the original one when we call ResetFieldBit(). But I'm not sure
206 * why the original code calls ResetFieldBit(), since we're already
207 * going through the fields in order...
208 *
209 * fields_size is the number of uint32's we will need to hold the
210 * bit-mask for all of the fields. If our highest field number is
211 * 100, then we'll need 100 / (8*4)+1 == 4 uint32's to hold the
212 * fieldset.
213 *
214 * Unlike the original code, we allocate fields dynamically based
215 * on the requested pdir_fields_last value, allowing private
216 * data subdirectories to contain more than the built-in code's limit
217 * of 95 tags in a directory.
218 */
219 fields_size = pdir_fields_last / (8*sizeof(uint32)) + 1;
220 fields = _TIFFmalloc(fields_size*sizeof(uint32));
221 _TIFFmemcpy(fields, pdir_fieldsset, fields_size * sizeof(uint32));
222
223 /* Deleted "write out extra samples tag" code here. */
224
225 /* Deleted code for checking a billion little special cases for the
226 * standard TIFF tags. Should add a general mechanism for overloading
227 * write function for each field, just like Brian kept telling me!!!
228 */
229 for (fip = field_info; fip->field_tag; fip++) {
230 /* Deleted code to check for FIELD_IGNORE!! */
231 if (/* fip->field_bit == FIELD_IGNORE || */
232 !FieldSet(fields, fip->field_bit))
233 continue;
234 if (!TIFFWriteNormalSubTag(tif, dir, fip, getFieldFn))
235 goto bad;
236 dir++;
237 ResetFieldBit(fields, fip->field_bit);
238 }
239
240 /* Now we've written all of the referenced data, and are about to
241 write the main directory structure, so grab the tif_dataoff value
242 now so we can remember where we wrote the directory. */
243 directory_offset = tif->tif_dataoff;
244
245 /*
246 * Write directory.
247 */
248 dircount = (uint16) nfields;
249 /* Deleted code to link to the next directory - we set it to zero! */
250 nextdiroff = 0;
251 if (tif->tif_flags & TIFF_SWAB) {
252 /*
253 * The file's byte order is opposite to the
254 * native machine architecture. We overwrite
255 * the directory information with impunity
256 * because it'll be released below after we
257 * write it to the file. Note that all the
258 * other tag construction routines assume that
259 * we do this byte-swapping; i.e. they only
260 * byte-swap indirect data.
261 */
262 for (dir = (TIFFDirEntry*) data; dircount; dir++, dircount--) {
263 TIFFSwabArrayOfShort(&dir->tdir_tag, 2);
264 TIFFSwabArrayOfLong(&dir->tdir_count, 2);
265 }
266 dircount = (uint16) nfields;
267 TIFFSwabShort(&dircount);
268 TIFFSwabLong(&nextdiroff);
269 }
270
271 (void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET);
272 if (!WriteOK(tif, &dircount, sizeof (dircount))) {
273 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory count");
274 goto bad;
275 }
276 if (!WriteOK(tif, data, dirsize)) {
277 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory contents");
278 goto bad;
279 }
280 if (!WriteOK(tif, &nextdiroff, sizeof (nextdiroff))) {
281 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory link");
282 goto bad;
283 }
284 tif->tif_dataoff += sizeof(dircount) + dirsize + sizeof(nextdiroff);
285
286 _TIFFfree(data);
287 _TIFFfree(fields);
288 tif->tif_flags &= ~TIFF_DIRTYDIRECT;
289
290#if (0)
291 /* This stuff commented out because I don't think we want it for
292 subdirectories, but I could be wrong. */
293 (*tif->tif_cleanup)(tif);
294
295 /*
296 * Reset directory-related state for subsequent
297 * directories.
298 */
299 TIFFDefaultDirectory(tif);
300 tif->tif_curoff = 0;
301 tif->tif_row = (uint32) -1;
302 tif->tif_curstrip = (tstrip_t) -1;
303#endif
304
305 return (directory_offset);
306bad:
307 _TIFFfree(data);
308 _TIFFfree(fields);
309 return (0);
310}
311#undef WriteRationalPair
312
313/*
314 * Process tags that are not special cased.
315 */
316/* The standard function TIFFWriteNormalTag() could definitely be replaced
317 with a simple call to this function, just adding TIFFGetField() as the
318 last argument. */
319static int
320TIFFWriteNormalSubTag(TIFF* tif, TIFFDirEntry* dir, const TIFFFieldInfo* fip,
321 int (*getFieldFn)(TIFF *tif, ttag_t tag, ...))
322{
323 u_short wc = (u_short) fip->field_writecount;
324
325 dir->tdir_tag = fip->field_tag;
326 dir->tdir_type = (u_short) fip->field_type;
327 dir->tdir_count = wc;
328#define WRITEF(x,y) x(tif, fip->field_type, fip->field_tag, dir, wc, y)
329 switch (fip->field_type) {
330 case TIFF_SHORT:
331 case TIFF_SSHORT:
332 if (wc > 1) {
333 uint16* wp;
334 if (wc == (u_short) TIFF_VARIABLE) {
335 (*getFieldFn)(tif, fip->field_tag, &wc, &wp);
336 dir->tdir_count = wc;
337 } else
338 (*getFieldFn)(tif, fip->field_tag, &wp);
339 if (!WRITEF(TIFFWriteShortArray, wp))
340 return (0);
341 } else {
342 uint16 sv;
343 (*getFieldFn)(tif, fip->field_tag, &sv);
344 dir->tdir_offset =
345 TIFFInsertData(tif, dir->tdir_type, sv);
346 }
347 break;
348 case TIFF_LONG:
349 case TIFF_SLONG:
350 if (wc > 1) {
351 uint32* lp;
352 if (wc == (u_short) TIFF_VARIABLE) {
353 (*getFieldFn)(tif, fip->field_tag, &wc, &lp);
354 dir->tdir_count = wc;
355 } else
356 (*getFieldFn)(tif, fip->field_tag, &lp);
357 if (!WRITEF(TIFFWriteLongArray, lp))
358 return (0);
359 } else {
360 /* XXX handle LONG->SHORT conversion */
361 (*getFieldFn)(tif, fip->field_tag, &dir->tdir_offset);
362 }
363 break;
364 case TIFF_RATIONAL:
365 case TIFF_SRATIONAL:
366 if (wc > 1) {
367 float* fp;
368 if (wc == (u_short) TIFF_VARIABLE) {
369 (*getFieldFn)(tif, fip->field_tag, &wc, &fp);
370 dir->tdir_count = wc;
371 } else
372 (*getFieldFn)(tif, fip->field_tag, &fp);
373 if (!WRITEF(TIFFWriteRationalArray, fp))
374 return (0);
375 } else {
376 float fv;
377 (*getFieldFn)(tif, fip->field_tag, &fv);
378 if (!WRITEF(TIFFWriteRationalArray, &fv))
379 return (0);
380 }
381 break;
382 case TIFF_FLOAT:
383 if (wc > 1) {
384 float* fp;
385 if (wc == (u_short) TIFF_VARIABLE) {
386 (*getFieldFn)(tif, fip->field_tag, &wc, &fp);
387 dir->tdir_count = wc;
388 } else
389 (*getFieldFn)(tif, fip->field_tag, &fp);
390 if (!WRITEF(TIFFWriteFloatArray, fp))
391 return (0);
392 } else {
393 float fv;
394 (*getFieldFn)(tif, fip->field_tag, &fv);
395 if (!WRITEF(TIFFWriteFloatArray, &fv))
396 return (0);
397 }
398 break;
399 case TIFF_DOUBLE:
400 /* Hey - I think this is a bug, or at least a "gross
401 inconsistency", in the TIFF library. Look at the original
402 TIFF library code below within the "#if (0) ... #else".
403 Just from the type of *dp, you can see that this code
404 expects TIFFGetField() to be handed a double ** for
405 any TIFF_DOUBLE tag, even for the constant wc==1 case.
406 This is totally inconsistent with other fields (like
407 TIFF_FLOAT, above) and is also inconsistent with the
408 TIFFSetField() function for TIFF_DOUBLEs, which expects
409 to be passed a single double by value for the wc==1 case.
410 (See the handling of TIFFFetchNormalTag() in tif_dirread.c
411 for an example.) Maybe this function was written before
412 TIFFWriteDoubleArray() was written, not that that's an
413 excuse. Anyway, the new code below is a trivial modification
414 of the TIFF_FLOAT code above. The fact that even single
415 doubles get written out in the data segment and get an
416 offset value stored is irrelevant here - that is all
417 handled by TIFFWriteDoubleArray(). */
418#if (0)
419 { double* dp;
420 if (wc == (u_short) TIFF_VARIABLE) {
421 (*getFieldFn)(tif, fip->field_tag, &wc, &dp);
422 dir->tdir_count = wc;
423 } else
424 (*getFieldFn)(tif, fip->field_tag, &dp);
425 TIFFCvtNativeToIEEEDouble(tif, wc, dp);
426 if (!TIFFWriteData(tif, dir, (char*) dp))
427 return (0);
428 }
429#else
430 if (wc > 1) {
431 double* dp;
432 if (wc == (u_short) TIFF_VARIABLE) {
433 (*getFieldFn)(tif, fip->field_tag, &wc, &dp);
434 dir->tdir_count = wc;
435 } else
436 (*getFieldFn)(tif, fip->field_tag, &dp);
437 if (!WRITEF(TIFFWriteDoubleArray, dp))
438 return (0);
439 } else {
440 double dv;
441 (*getFieldFn)(tif, fip->field_tag, &dv);
442 if (!WRITEF(TIFFWriteDoubleArray, &dv))
443 return (0);
444 }
445#endif
446 break;
447 case TIFF_ASCII:
448 { char* cp;
449 (*getFieldFn)(tif, fip->field_tag, &cp);
450 dir->tdir_count = (uint32) (strlen(cp) + 1);
451 if (!TIFFWriteByteArray(tif, dir, cp))
452 return (0);
453 }
454 break;
455 case TIFF_UNDEFINED:
456 { char* cp;
457 if (wc == (u_short) TIFF_VARIABLE) {
458 (*getFieldFn)(tif, fip->field_tag, &wc, &cp);
459 dir->tdir_count = wc;
460 } else
461 (*getFieldFn)(tif, fip->field_tag, &cp);
462 if (!TIFFWriteByteArray(tif, dir, cp))
463 return (0);
464 }
465 break;
466 }
467 return (1);
468}
469#undef WRITEF
470
471/* Everything after this is exactly duplicated from the standard tif_dirwrite.c
472 file, necessitated by the fact that they are declared static there so
473 we can't call them!
474*/
475/*
476 * Setup a directory entry with either a SHORT
477 * or LONG type according to the value.
478 */
479static void
480TIFFSetupShortLong(TIFF* tif, ttag_t tag, TIFFDirEntry* dir, uint32 v)
481{
482 dir->tdir_tag = tag;
483 dir->tdir_count = 1;
484 if (v > 0xffffL) {
485 dir->tdir_type = (short) TIFF_LONG;
486 dir->tdir_offset = v;
487 } else {
488 dir->tdir_type = (short) TIFF_SHORT;
489 dir->tdir_offset = TIFFInsertData(tif, (int) TIFF_SHORT, v);
490 }
491}
492#undef MakeShortDirent
493
494#ifndef TIFFWriteRational
495/*
496 * Setup a RATIONAL directory entry and
497 * write the associated indirect value.
498 */
499static int
500TIFFWriteRational(TIFF* tif,
501 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, float v)
502{
503 return (TIFFWriteRationalArray(tif, type, tag, dir, 1, &v));
504}
505#endif
506
507#define NITEMS(x) (sizeof (x) / sizeof (x[0]))
508/*
509 * Setup a directory entry that references a
510 * samples/pixel array of SHORT values and
511 * (potentially) write the associated indirect
512 * values.
513 */
514static int
515TIFFWritePerSampleShorts(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
516{
517 uint16 buf[10], v;
518 uint16* w = buf;
519 int i, status, samples = tif->tif_dir.td_samplesperpixel;
520
521 if (samples > NITEMS(buf))
522 w = (uint16*) _TIFFmalloc(samples * sizeof (uint16));
523 TIFFGetField(tif, tag, &v);
524 for (i = 0; i < samples; i++)
525 w[i] = v;
526 status = TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, samples, w);
527 if (w != buf)
528 _TIFFfree((char*) w);
529 return (status);
530}
531
532/*
533 * Setup a directory entry that references a samples/pixel array of ``type''
534 * values and (potentially) write the associated indirect values. The source
535 * data from TIFFGetField() for the specified tag must be returned as double.
536 */
537static int
538TIFFWritePerSampleAnys(TIFF* tif,
539 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir)
540{
541 double buf[10], v;
542 double* w = buf;
543 int i, status;
544 int samples = (int) tif->tif_dir.td_samplesperpixel;
545
546 if (samples > NITEMS(buf))
547 w = (double*) _TIFFmalloc(samples * sizeof (double));
548 TIFFGetField(tif, tag, &v);
549 for (i = 0; i < samples; i++)
550 w[i] = v;
551 status = TIFFWriteAnyArray(tif, type, tag, dir, samples, w);
552 if (w != buf)
553 _TIFFfree(w);
554 return (status);
555}
556#undef NITEMS
557
558/*
559 * Setup a pair of shorts that are returned by
560 * value, rather than as a reference to an array.
561 */
562static int
563TIFFSetupShortPair(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
564{
565 uint16 v[2];
566
567 TIFFGetField(tif, tag, &v[0], &v[1]);
568 return (TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, 2, v));
569}
570
571/*
572 * Setup a directory entry for an NxM table of shorts,
573 * where M is known to be 2**bitspersample, and write
574 * the associated indirect data.
575 */
576static int
577TIFFWriteShortTable(TIFF* tif,
578 ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16** table)
579{
580 uint32 i, off;
581
582 dir->tdir_tag = tag;
583 dir->tdir_type = (short) TIFF_SHORT;
584 /* XXX -- yech, fool TIFFWriteData */
585 dir->tdir_count = (uint32) (1L<<tif->tif_dir.td_bitspersample);
586 off = tif->tif_dataoff;
587 for (i = 0; i < n; i++)
588 if (!TIFFWriteData(tif, dir, (char *)table[i]))
589 return (0);
590 dir->tdir_count *= n;
591 dir->tdir_offset = off;
592 return (1);
593}
594
595/*
596 * Write/copy data associated with an ASCII or opaque tag value.
597 */
598static int
599TIFFWriteByteArray(TIFF* tif, TIFFDirEntry* dir, char* cp)
600{
601 if (dir->tdir_count > 4) {
602 if (!TIFFWriteData(tif, dir, cp))
603 return (0);
604 } else
605 _TIFFmemcpy(&dir->tdir_offset, cp, dir->tdir_count);
606 return (1);
607}
608
609/*
610 * Setup a directory entry of an array of SHORT
611 * or SSHORT and write the associated indirect values.
612 */
613static int
614TIFFWriteShortArray(TIFF* tif,
615 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16* v)
616{
617 dir->tdir_tag = tag;
618 dir->tdir_type = (short) type;
619 dir->tdir_count = n;
620 if (n <= 2) {
621 if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
622 dir->tdir_offset = (uint32) ((long) v[0] << 16);
623 if (n == 2)
624 dir->tdir_offset |= v[1] & 0xffff;
625 } else {
626 dir->tdir_offset = v[0] & 0xffff;
627 if (n == 2)
628 dir->tdir_offset |= (long) v[1] << 16;
629 }
630 return (1);
631 } else
632 return (TIFFWriteData(tif, dir, (char*) v));
633}
634
635/*
636 * Setup a directory entry of an array of LONG
637 * or SLONG and write the associated indirect values.
638 */
639static int
640TIFFWriteLongArray(TIFF* tif,
641 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint32* v)
642{
643 dir->tdir_tag = tag;
644 dir->tdir_type = (short) type;
645 dir->tdir_count = n;
646 if (n == 1) {
647 dir->tdir_offset = v[0];
648 return (1);
649 } else
650 return (TIFFWriteData(tif, dir, (char*) v));
651}
652
653/*
654 * Setup a directory entry of an array of RATIONAL
655 * or SRATIONAL and write the associated indirect values.
656 */
657static int
658TIFFWriteRationalArray(TIFF* tif,
659 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
660{
661 uint32 i;
662 uint32* t;
663 int status;
664
665 dir->tdir_tag = tag;
666 dir->tdir_type = (short) type;
667 dir->tdir_count = n;
668 t = (uint32*) _TIFFmalloc(2*n * sizeof (uint32));
669 for (i = 0; i < n; i++) {
670 float fv = v[i];
671 int sign = 1;
672 uint32 den;
673
674 if (fv < 0) {
675 if (type == TIFF_RATIONAL) {
676 TIFFWarning(tif->tif_name,
677 "\"%s\": Information lost writing value (%g) as (unsigned) RATIONAL",
678 _TIFFFieldWithTag(tif,tag)->field_name, v);
679 fv = 0;
680 } else
681 fv = -fv, sign = -1;
682 }
683 den = 1L;
684 if (fv > 0) {
685 while (fv < 1L<<(31-3) && den < 1L<<(31-3))
686 fv *= 1<<3, den *= 1L<<3;
687 }
688 t[2*i+0] = sign * (fv + 0.5);
689 t[2*i+1] = den;
690 }
691 status = TIFFWriteData(tif, dir, (char *)t);
692 _TIFFfree((char*) t);
693 return (status);
694}
695
696static int
697TIFFWriteFloatArray(TIFF* tif,
698 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
699{
700 dir->tdir_tag = tag;
701 dir->tdir_type = (short) type;
702 dir->tdir_count = n;
703 TIFFCvtNativeToIEEEFloat(tif, n, v);
704 if (n == 1) {
705 dir->tdir_offset = *(uint32*) &v[0];
706 return (1);
707 } else
708 return (TIFFWriteData(tif, dir, (char*) v));
709}
710
711static int
712TIFFWriteDoubleArray(TIFF* tif,
713 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
714{
715 dir->tdir_tag = tag;
716 dir->tdir_type = (short) type;
717 dir->tdir_count = n;
718 TIFFCvtNativeToIEEEDouble(tif, n, v);
719 return (TIFFWriteData(tif, dir, (char*) v));
720}
721
722/*
723 * Write an array of ``type'' values for a specified tag (i.e. this is a tag
724 * which is allowed to have different types, e.g. SMaxSampleType).
725 * Internally the data values are represented as double since a double can
726 * hold any of the TIFF tag types (yes, this should really be an abstract
727 * type tany_t for portability). The data is converted into the specified
728 * type in a temporary buffer and then handed off to the appropriate array
729 * writer.
730 */
731static int
732TIFFWriteAnyArray(TIFF* tif,
733 TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
734{
735 char buf[10 * sizeof(double)];
736 char* w = buf;
737 int i, status = 0;
738
739 if (n * TIFFDataWidth(type) > sizeof buf)
740 w = (char*) _TIFFmalloc(n * TIFFDataWidth(type));
741 switch (type) {
742 case TIFF_BYTE:
743 { unsigned char* bp = (unsigned char*) w;
744 for (i = 0; i < n; i++)
745 bp[i] = (unsigned char) v[i];
746 dir->tdir_tag = tag;
747 dir->tdir_type = (short) type;
748 dir->tdir_count = n;
749 if (!TIFFWriteByteArray(tif, dir, (char*) bp))
750 goto out;
751 }
752 break;
753 case TIFF_SBYTE:
754 { signed char* bp = (signed char*) w;
755 for (i = 0; i < n; i++)
756 bp[i] = (signed char) v[i];
757 dir->tdir_tag = tag;
758 dir->tdir_type = (short) type;
759 dir->tdir_count = n;
760 if (!TIFFWriteByteArray(tif, dir, (char*) bp))
761 goto out;
762 }
763 break;
764 case TIFF_SHORT:
765 { uint16* bp = (uint16*) w;
766 for (i = 0; i < n; i++)
767 bp[i] = (uint16) v[i];
768 if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
769 goto out;
770 }
771 break;
772 case TIFF_SSHORT:
773 { int16* bp = (int16*) w;
774 for (i = 0; i < n; i++)
775 bp[i] = (int16) v[i];
776 if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
777 goto out;
778 }
779 break;
780 case TIFF_LONG:
781 { uint32* bp = (uint32*) w;
782 for (i = 0; i < n; i++)
783 bp[i] = (uint32) v[i];
784 if (!TIFFWriteLongArray(tif, type, tag, dir, n, bp))
785 goto out;
786 }
787 break;
788 case TIFF_SLONG:
789 { int32* bp = (int32*) w;
790 for (i = 0; i < n; i++)
791 bp[i] = (int32) v[i];
792 if (!TIFFWriteLongArray(tif, type, tag, dir, n, (uint32*) bp))
793 goto out;
794 }
795 break;
796 case TIFF_FLOAT:
797 { float* bp = (float*) w;
798 for (i = 0; i < n; i++)
799 bp[i] = (float) v[i];
800 if (!TIFFWriteFloatArray(tif, type, tag, dir, n, bp))
801 goto out;
802 }
803 break;
804 case TIFF_DOUBLE:
805 return (TIFFWriteDoubleArray(tif, type, tag, dir, n, v));
806 default:
807 /* TIFF_NOTYPE */
808 /* TIFF_ASCII */
809 /* TIFF_UNDEFINED */
810 /* TIFF_RATIONAL */
811 /* TIFF_SRATIONAL */
812 goto out;
813 }
814 status = 1;
815 out:
816 if (w != buf)
817 _TIFFfree(w);
818 return (status);
819}
820
821#ifdef COLORIMETRY_SUPPORT
822static int
823TIFFWriteTransferFunction(TIFF* tif, TIFFDirEntry* dir)
824{
825 TIFFDirectory* td = &tif->tif_dir;
826 tsize_t n = (1L<<td->td_bitspersample) * sizeof (uint16);
827 uint16** tf = td->td_transferfunction;
828 int ncols;
829
830 /*
831 * Check if the table can be written as a single column,
832 * or if it must be written as 3 columns. Note that we
833 * write a 3-column tag if there are 2 samples/pixel and
834 * a single column of data won't suffice--hmm.
835 */
836 switch (td->td_samplesperpixel - td->td_extrasamples) {
837 default: if (_TIFFmemcmp(tf[0], tf[2], n)) { ncols = 3; break; }
838 case 2: if (_TIFFmemcmp(tf[0], tf[1], n)) { ncols = 3; break; }
839 case 1: case 0: ncols = 1;
840 }
841 return (TIFFWriteShortTable(tif,
842 TIFFTAG_TRANSFERFUNCTION, dir, ncols, tf));
843}
844#endif
845
846/*
847 * Write a contiguous directory item.
848 */
849static int
850TIFFWriteData(TIFF* tif, TIFFDirEntry* dir, char* cp)
851{
852 tsize_t cc;
853
854 if (tif->tif_flags & TIFF_SWAB) {
855 switch (dir->tdir_type) {
856 case TIFF_SHORT:
857 case TIFF_SSHORT:
858 TIFFSwabArrayOfShort((uint16*) cp, dir->tdir_count);
859 break;
860 case TIFF_LONG:
861 case TIFF_SLONG:
862 case TIFF_FLOAT:
863 TIFFSwabArrayOfLong((uint32*) cp, dir->tdir_count);
864 break;
865 case TIFF_RATIONAL:
866 case TIFF_SRATIONAL:
867 TIFFSwabArrayOfLong((uint32*) cp, 2*dir->tdir_count);
868 break;
869 case TIFF_DOUBLE:
870 TIFFSwabArrayOfDouble((double*) cp, dir->tdir_count);
871 break;
872 }
873 }
874 dir->tdir_offset = tif->tif_dataoff;
875 cc = dir->tdir_count * TIFFDataWidth(dir->tdir_type);
876 if (SeekOK(tif, dir->tdir_offset) &&
877 WriteOK(tif, cp, cc)) {
878 tif->tif_dataoff += (cc + 1) & ~1;
879 return (1);
880 }
881 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing data for field \"%s\"",
882 _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
883 return (0);
884}
885
886/*
887 * Link the current directory into the
888 * directory chain for the file.
889 */
890static int
891TIFFLinkDirectory(TIFF* tif)
892{
893 static const char module[] = "TIFFLinkDirectory";
894 uint32 nextdir;
895 uint32 diroff;
896
897 tif->tif_diroff = (TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;
898 diroff = (uint32) tif->tif_diroff;
899 if (tif->tif_flags & TIFF_SWAB)
900 TIFFSwabLong(&diroff);
901#if SUBIFD_SUPPORT
902 if (tif->tif_flags & TIFF_INSUBIFD) {
903 (void) TIFFSeekFile(tif, tif->tif_subifdoff, SEEK_SET);
904 if (!WriteOK(tif, &diroff, sizeof (diroff))) {
905 TIFFErrorExt(tif->tif_clientdata, module,
906 "%s: Error writing SubIFD directory link",
907 tif->tif_name);
908 return (0);
909 }
910 /*
911 * Advance to the next SubIFD or, if this is
912 * the last one configured, revert back to the
913 * normal directory linkage.
914 */
915 if (--tif->tif_nsubifd)
916 tif->tif_subifdoff += sizeof (diroff);
917 else
918 tif->tif_flags &= ~TIFF_INSUBIFD;
919 return (1);
920 }
921#endif
922 if (tif->tif_header.tiff_diroff == 0) {
923 /*
924 * First directory, overwrite offset in header.
925 */
926 tif->tif_header.tiff_diroff = (uint32) tif->tif_diroff;
927#define HDROFF(f) ((toff_t) &(((TIFFHeader*) 0)->f))
928 (void) TIFFSeekFile(tif, HDROFF(tiff_diroff), SEEK_SET);
929 if (!WriteOK(tif, &diroff, sizeof (diroff))) {
930 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing TIFF header");
931 return (0);
932 }
933 return (1);
934 }
935 /*
936 * Not the first directory, search to the last and append.
937 */
938 nextdir = tif->tif_header.tiff_diroff;
939 do {
940 uint16 dircount;
941
942 if (!SeekOK(tif, nextdir) ||
943 !ReadOK(tif, &dircount, sizeof (dircount))) {
944 TIFFErrorExt(tif->tif_clientdata, module, "Error fetching directory count");
945 return (0);
946 }
947 if (tif->tif_flags & TIFF_SWAB)
948 TIFFSwabShort(&dircount);
949 (void) TIFFSeekFile(tif,
950 dircount * sizeof (TIFFDirEntry), SEEK_CUR);
951 if (!ReadOK(tif, &nextdir, sizeof (nextdir))) {
952 TIFFErrorExt(tif->tif_clientdata, module, "Error fetching directory link");
953 return (0);
954 }
955 if (tif->tif_flags & TIFF_SWAB)
956 TIFFSwabLong(&nextdir);
957 } while (nextdir != 0);
958 (void) TIFFSeekFile(tif, -(toff_t) sizeof (nextdir), SEEK_CUR);
959 if (!WriteOK(tif, &diroff, sizeof (diroff))) {
960 TIFFErrorExt(tif->tif_clientdata, module, "Error writing directory link");
961 return (0);
962 }
963 return (1);
964}