Line data Source code
1 : /*
2 : * Copyright (c) 1995-1997 Sam Leffler
3 : * Copyright (c) 1995-1997 Silicon Graphics, Inc.
4 : *
5 : * Permission to use, copy, modify, distribute, and sell this software and
6 : * its documentation for any purpose is hereby granted without fee, provided
7 : * that (i) the above copyright notices and this permission notice appear in
8 : * all copies of the software and related documentation, and (ii) the names of
9 : * Sam Leffler and Silicon Graphics may not be used in any advertising or
10 : * publicity relating to the software without the specific, prior written
11 : * permission of Sam Leffler and Silicon Graphics.
12 : *
13 : * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
14 : * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 : * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 : *
17 : * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
18 : * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 : * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 : * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 : * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 : * OF THIS SOFTWARE.
23 : */
24 :
25 : #include "tiffiop.h"
26 : #ifdef ZIP_SUPPORT
27 : /*
28 : * TIFF Library.
29 : *
30 : * ZIP (aka Deflate) Compression Support
31 : *
32 : * This file is an interface to the zlib library written by
33 : * Jean-loup Gailly and Mark Adler. You must use version 1.0 or later
34 : * of the library.
35 : *
36 : * Optionally, libdeflate (https://github.com/ebiggers/libdeflate) may be used
37 : * to do the compression and decompression, but only for whole strips and tiles.
38 : * For scanline access, zlib will be sued as a fallback.
39 : */
40 : #include "tif_predict.h"
41 : #include "zlib.h"
42 :
43 : #if LIBDEFLATE_SUPPORT
44 : #include "libdeflate.h"
45 : #endif
46 : #define LIBDEFLATE_MAX_COMPRESSION_LEVEL 12
47 :
48 : #include <stdio.h>
49 :
50 : /*
51 : * Sigh, ZLIB_VERSION is defined as a string so there's no
52 : * way to do a proper check here. Instead we guess based
53 : * on the presence of #defines that were added between the
54 : * 0.95 and 1.0 distributions.
55 : */
56 : #if !defined(Z_NO_COMPRESSION) || !defined(Z_DEFLATED)
57 : #error "Antiquated ZLIB software; you must use version 1.0 or later"
58 : #endif
59 :
60 : #define SAFE_MSG(sp) ((sp)->stream.msg == NULL ? "" : (sp)->stream.msg)
61 :
62 : /*
63 : * State block for each open TIFF
64 : * file using ZIP compression/decompression.
65 : */
66 : typedef struct
67 : {
68 : TIFFPredictorState predict;
69 : z_stream stream;
70 : int read_error; /* whether a read error has occurred, and which should cause
71 : further reads in the same strip/tile to be aborted */
72 : int zipquality; /* compression level */
73 : int state; /* state flags */
74 : int subcodec; /* DEFLATE_SUBCODEC_ZLIB or DEFLATE_SUBCODEC_LIBDEFLATE */
75 : #if LIBDEFLATE_SUPPORT
76 : int libdeflate_state; /* -1 = until first time ZIPEncode() / ZIPDecode() is
77 : called, 0 = use zlib, 1 = use libdeflate */
78 : struct libdeflate_decompressor *libdeflate_dec;
79 : struct libdeflate_compressor *libdeflate_enc;
80 : #endif
81 : #define ZSTATE_INIT_DECODE 0x01
82 : #define ZSTATE_INIT_ENCODE 0x02
83 :
84 : TIFFVGetMethod vgetparent; /* super-class method */
85 : TIFFVSetMethod vsetparent; /* super-class method */
86 : } ZIPState;
87 :
88 : #define GetZIPState(tif) ((ZIPState *)(tif)->tif_data)
89 : #define ZIPDecoderState(tif) GetZIPState(tif)
90 : #define ZIPEncoderState(tif) GetZIPState(tif)
91 :
92 : static int ZIPEncode(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s);
93 : static int ZIPDecode(TIFF *tif, uint8_t *op, tmsize_t occ, uint16_t s);
94 :
95 2405 : static int ZIPFixupTags(TIFF *tif)
96 : {
97 : (void)tif;
98 2405 : return (1);
99 : }
100 :
101 568 : static int ZIPSetupDecode(TIFF *tif)
102 : {
103 : static const char module[] = "ZIPSetupDecode";
104 568 : ZIPState *sp = ZIPDecoderState(tif);
105 :
106 568 : assert(sp != NULL);
107 :
108 : /* if we were last encoding, terminate this mode */
109 568 : if (sp->state & ZSTATE_INIT_ENCODE)
110 : {
111 15 : deflateEnd(&sp->stream);
112 15 : sp->state = 0;
113 : }
114 :
115 : /* This function can possibly be called several times by */
116 : /* PredictorSetupDecode() if this function succeeds but */
117 : /* PredictorSetup() fails */
118 1136 : if ((sp->state & ZSTATE_INIT_DECODE) == 0 &&
119 568 : inflateInit(&sp->stream) != Z_OK)
120 : {
121 0 : TIFFErrorExtR(tif, module, "%s", SAFE_MSG(sp));
122 0 : return (0);
123 : }
124 : else
125 : {
126 568 : sp->state |= ZSTATE_INIT_DECODE;
127 568 : return (1);
128 : }
129 : }
130 :
131 19232 : static inline uint64_t TIFF_MIN_UINT64(uint64_t a, uint64_t b)
132 : {
133 19232 : return a < b ? a : b;
134 : }
135 :
136 19232 : static inline uInt TIFF_CLAMP_UINT64_TO_INT32_MAX(uint64_t v)
137 : {
138 19232 : return (uInt)TIFF_MIN_UINT64(v, INT32_MAX);
139 : }
140 :
141 : /*
142 : * Setup state for decoding a strip.
143 : */
144 8784 : static int ZIPPreDecode(TIFF *tif, uint16_t s)
145 : {
146 8784 : ZIPState *sp = ZIPDecoderState(tif);
147 :
148 : (void)s;
149 8784 : assert(sp != NULL);
150 :
151 8784 : if ((sp->state & ZSTATE_INIT_DECODE) == 0)
152 15 : tif->tif_setupdecode(tif);
153 :
154 : #if LIBDEFLATE_SUPPORT
155 8784 : sp->libdeflate_state = -1;
156 : #endif
157 8784 : sp->stream.next_in = tif->tif_rawdata;
158 : assert(sizeof(sp->stream.avail_in) == 4); /* if this assert gets raised,
159 : we need to simplify this code to reflect a ZLib that is likely updated
160 : to deal with 8byte memory sizes, though this code will respond
161 : appropriately even before we simplify it */
162 8784 : sp->stream.avail_in =
163 8784 : TIFF_CLAMP_UINT64_TO_INT32_MAX((uint64_t)tif->tif_rawcc);
164 8784 : if (inflateReset(&sp->stream) == Z_OK)
165 : {
166 8784 : sp->read_error = 0;
167 8784 : return 1;
168 : }
169 0 : return 0;
170 : }
171 :
172 10784 : static int ZIPDecode(TIFF *tif, uint8_t *op, tmsize_t occ, uint16_t s)
173 : {
174 : static const char module[] = "ZIPDecode";
175 10784 : ZIPState *sp = ZIPDecoderState(tif);
176 :
177 : (void)s;
178 10784 : assert(sp != NULL);
179 10784 : assert(sp->state == ZSTATE_INIT_DECODE);
180 :
181 10784 : if (sp->read_error)
182 : {
183 0 : memset(op, 0, (size_t)occ);
184 0 : TIFFErrorExtR(tif, module,
185 : "ZIPDecode: Scanline %" PRIu32 " cannot be read due to "
186 : "previous error",
187 : tif->tif_row);
188 0 : return 0;
189 : }
190 :
191 : #if LIBDEFLATE_SUPPORT
192 10784 : if (sp->libdeflate_state == 1)
193 0 : return 0;
194 :
195 : /* If we have libdeflate support and we are asked to read a whole */
196 : /* strip/tile, then go for using it */
197 : do
198 : {
199 10784 : TIFFDirectory *td = &tif->tif_dir;
200 :
201 10784 : if (sp->libdeflate_state == 0)
202 2000 : break;
203 8784 : if (sp->subcodec == DEFLATE_SUBCODEC_ZLIB)
204 0 : break;
205 :
206 : /* Check if we are in the situation where we can use libdeflate */
207 8784 : if (isTiled(tif))
208 : {
209 1047 : if (TIFFTileSize64(tif) != (uint64_t)occ)
210 173 : break;
211 : }
212 : else
213 : {
214 7737 : uint32_t strip_height = td->td_imagelength - tif->tif_row;
215 7737 : if (strip_height > td->td_rowsperstrip)
216 6906 : strip_height = td->td_rowsperstrip;
217 7737 : if (TIFFVStripSize64(tif, strip_height) != (uint64_t)occ)
218 2 : break;
219 : }
220 :
221 : /* Check for overflow */
222 : if ((size_t)tif->tif_rawcc != (uint64_t)tif->tif_rawcc)
223 : break;
224 : if ((size_t)occ != (uint64_t)occ)
225 : break;
226 :
227 : /* Go for decompression using libdeflate */
228 : {
229 : enum libdeflate_result res;
230 8609 : if (sp->libdeflate_dec == NULL)
231 : {
232 505 : sp->libdeflate_dec = libdeflate_alloc_decompressor();
233 505 : if (sp->libdeflate_dec == NULL)
234 : {
235 0 : break;
236 : }
237 : }
238 :
239 8609 : sp->libdeflate_state = 1;
240 :
241 8609 : res = libdeflate_zlib_decompress(sp->libdeflate_dec, tif->tif_rawcp,
242 8609 : (size_t)tif->tif_rawcc, op,
243 : (size_t)occ, NULL);
244 :
245 8609 : tif->tif_rawcp += tif->tif_rawcc;
246 8609 : tif->tif_rawcc = 0;
247 :
248 : /* We accept LIBDEFLATE_INSUFFICIENT_SPACE has a return */
249 : /* There are odd files in the wild where the last strip, when */
250 : /* it is smaller in height than td_rowsperstrip, actually contains
251 : */
252 : /* data for td_rowsperstrip lines. Just ignore that silently. */
253 8609 : if (res != LIBDEFLATE_SUCCESS &&
254 : res != LIBDEFLATE_INSUFFICIENT_SPACE)
255 : {
256 0 : memset(op, 0, (size_t)occ);
257 0 : TIFFErrorExtR(tif, module, "Decoding error at scanline %lu",
258 0 : (unsigned long)tif->tif_row);
259 0 : sp->read_error = 1;
260 0 : return 0;
261 : }
262 :
263 8609 : return 1;
264 : }
265 : } while (0);
266 2175 : sp->libdeflate_state = 0;
267 : #endif /* LIBDEFLATE_SUPPORT */
268 :
269 2175 : sp->stream.next_in = tif->tif_rawcp;
270 :
271 2175 : sp->stream.next_out = op;
272 : assert(sizeof(sp->stream.avail_out) == 4); /* if this assert gets raised,
273 : we need to simplify this code to reflect a ZLib that is likely updated
274 : to deal with 8byte memory sizes, though this code will respond
275 : appropriately even before we simplify it */
276 : do
277 : {
278 : int state;
279 : uInt avail_in_before =
280 2175 : TIFF_CLAMP_UINT64_TO_INT32_MAX((uint64_t)tif->tif_rawcc);
281 2175 : uInt avail_out_before = TIFF_CLAMP_UINT64_TO_INT32_MAX((uint64_t)occ);
282 2175 : sp->stream.avail_in = avail_in_before;
283 2175 : sp->stream.avail_out = avail_out_before;
284 2175 : state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
285 2175 : tif->tif_rawcc -= (avail_in_before - sp->stream.avail_in);
286 2175 : occ -= (avail_out_before - sp->stream.avail_out);
287 2175 : if (state == Z_STREAM_END)
288 1 : break;
289 2174 : if (state == Z_DATA_ERROR)
290 : {
291 1 : memset(sp->stream.next_out, 0, (size_t)occ);
292 1 : TIFFErrorExtR(tif, module, "Decoding error at scanline %lu, %s",
293 2 : (unsigned long)tif->tif_row, SAFE_MSG(sp));
294 1 : sp->read_error = 1;
295 1 : return (0);
296 : }
297 2173 : if (state != Z_OK)
298 : {
299 0 : memset(sp->stream.next_out, 0, (size_t)occ);
300 0 : TIFFErrorExtR(tif, module, "ZLib error: %s", SAFE_MSG(sp));
301 0 : sp->read_error = 1;
302 0 : return (0);
303 : }
304 2173 : } while (occ > 0);
305 2174 : if (occ != 0)
306 : {
307 0 : TIFFErrorExtR(tif, module,
308 : "Not enough data at scanline %lu (short %" PRIu64
309 : " bytes)",
310 0 : (unsigned long)tif->tif_row, (uint64_t)occ);
311 0 : memset(sp->stream.next_out, 0, (size_t)occ);
312 0 : sp->read_error = 1;
313 0 : return (0);
314 : }
315 :
316 2174 : tif->tif_rawcp = sp->stream.next_in;
317 :
318 2174 : return (1);
319 : }
320 :
321 5744 : static int ZIPSetupEncode(TIFF *tif)
322 : {
323 : static const char module[] = "ZIPSetupEncode";
324 5744 : ZIPState *sp = ZIPEncoderState(tif);
325 : int cappedQuality;
326 :
327 5744 : assert(sp != NULL);
328 5744 : if (sp->state & ZSTATE_INIT_DECODE)
329 : {
330 8 : inflateEnd(&sp->stream);
331 8 : sp->state = 0;
332 : }
333 :
334 5744 : cappedQuality = sp->zipquality;
335 5744 : if (cappedQuality > Z_BEST_COMPRESSION)
336 0 : cappedQuality = Z_BEST_COMPRESSION;
337 :
338 5744 : if (deflateInit(&sp->stream, cappedQuality) != Z_OK)
339 : {
340 0 : TIFFErrorExtR(tif, module, "%s", SAFE_MSG(sp));
341 0 : return (0);
342 : }
343 : else
344 : {
345 5745 : sp->state |= ZSTATE_INIT_ENCODE;
346 5745 : return (1);
347 : }
348 : }
349 :
350 : /*
351 : * Reset encoding state at the start of a strip.
352 : */
353 16541 : static int ZIPPreEncode(TIFF *tif, uint16_t s)
354 : {
355 16541 : ZIPState *sp = ZIPEncoderState(tif);
356 :
357 : (void)s;
358 16541 : assert(sp != NULL);
359 16541 : if (sp->state != ZSTATE_INIT_ENCODE)
360 8 : tif->tif_setupencode(tif);
361 :
362 : #if LIBDEFLATE_SUPPORT
363 16527 : sp->libdeflate_state = -1;
364 : #endif
365 16527 : sp->stream.next_out = tif->tif_rawdata;
366 : assert(sizeof(sp->stream.avail_out) == 4); /* if this assert gets raised,
367 : we need to simplify this code to reflect a ZLib that is likely updated
368 : to deal with 8byte memory sizes, though this code will respond
369 : appropriately even before we simplify it */
370 33054 : sp->stream.avail_out = (uint64_t)tif->tif_rawdatasize <= 0xFFFFFFFFU
371 16529 : ? (uInt)tif->tif_rawdatasize
372 16527 : : 0xFFFFFFFFU;
373 16527 : return (deflateReset(&sp->stream) == Z_OK);
374 : }
375 :
376 : /*
377 : * Encode a chunk of pixels.
378 : */
379 18532 : static int ZIPEncode(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
380 : {
381 : static const char module[] = "ZIPEncode";
382 18532 : ZIPState *sp = ZIPEncoderState(tif);
383 :
384 18532 : assert(sp != NULL);
385 18532 : assert(sp->state == ZSTATE_INIT_ENCODE);
386 :
387 : (void)s;
388 :
389 : #if LIBDEFLATE_SUPPORT
390 18532 : if (sp->libdeflate_state == 1)
391 0 : return 0;
392 :
393 : /* If we have libdeflate support and we are asked to write a whole */
394 : /* strip/tile, then go for using it */
395 : do
396 : {
397 18532 : TIFFDirectory *td = &tif->tif_dir;
398 :
399 18532 : if (sp->libdeflate_state == 0)
400 2000 : break;
401 16532 : if (sp->subcodec == DEFLATE_SUBCODEC_ZLIB)
402 4097 : break;
403 :
404 : /* Libdeflate does not support the 0-compression level */
405 12435 : if (sp->zipquality == Z_NO_COMPRESSION)
406 0 : break;
407 :
408 : /* Check if we are in the situation where we can use libdeflate */
409 12435 : if (isTiled(tif))
410 : {
411 5727 : if (TIFFTileSize64(tif) != (uint64_t)cc)
412 0 : break;
413 : }
414 : else
415 : {
416 6708 : uint32_t strip_height = td->td_imagelength - tif->tif_row;
417 6708 : if (strip_height > td->td_rowsperstrip)
418 5248 : strip_height = td->td_rowsperstrip;
419 6708 : if (TIFFVStripSize64(tif, strip_height) != (uint64_t)cc)
420 1 : break;
421 : }
422 :
423 : /* Check for overflow */
424 : if ((size_t)tif->tif_rawdatasize != (uint64_t)tif->tif_rawdatasize)
425 : break;
426 : if ((size_t)cc != (uint64_t)cc)
427 : break;
428 :
429 : /* Go for compression using libdeflate */
430 : {
431 : size_t nCompressedBytes;
432 12443 : if (sp->libdeflate_enc == NULL)
433 : {
434 : /* To get results as good as zlib, we asked for an extra */
435 : /* level of compression */
436 1642 : sp->libdeflate_enc = libdeflate_alloc_compressor(
437 1642 : sp->zipquality == Z_DEFAULT_COMPRESSION ? 7
438 12 : : sp->zipquality >= 6 && sp->zipquality <= 9
439 12 : ? sp->zipquality + 1
440 32 : : sp->zipquality);
441 1641 : if (sp->libdeflate_enc == NULL)
442 : {
443 0 : TIFFErrorExtR(tif, module, "Cannot allocate compressor");
444 0 : break;
445 : }
446 : }
447 :
448 : /* Make sure the output buffer is large enough for the worse case.
449 : */
450 : /* In TIFFWriteBufferSetup(), when libtiff allocates the buffer */
451 : /* we've taken a 10% margin over the uncompressed size, which should
452 : */
453 : /* be large enough even for the the worse case scenario. */
454 12442 : if (libdeflate_zlib_compress_bound(sp->libdeflate_enc, (size_t)cc) >
455 12440 : (size_t)tif->tif_rawdatasize)
456 : {
457 0 : break;
458 : }
459 :
460 12440 : sp->libdeflate_state = 1;
461 12440 : nCompressedBytes = libdeflate_zlib_compress(
462 12440 : sp->libdeflate_enc, bp, (size_t)cc, tif->tif_rawdata,
463 12440 : (size_t)tif->tif_rawdatasize);
464 :
465 12432 : if (nCompressedBytes == 0)
466 : {
467 0 : TIFFErrorExtR(tif, module, "Encoder error at scanline %lu",
468 0 : (unsigned long)tif->tif_row);
469 0 : return 0;
470 : }
471 :
472 12432 : tif->tif_rawcc = (tmsize_t)nCompressedBytes;
473 :
474 12432 : if (!TIFFFlushData1(tif))
475 0 : return 0;
476 :
477 12444 : return 1;
478 : }
479 : } while (0);
480 6098 : sp->libdeflate_state = 0;
481 : #endif /* LIBDEFLATE_SUPPORT */
482 :
483 6098 : sp->stream.next_in = bp;
484 : assert(sizeof(sp->stream.avail_in) == 4); /* if this assert gets raised,
485 : we need to simplify this code to reflect a ZLib that is likely updated
486 : to deal with 8byte memory sizes, though this code will respond
487 : appropriately even before we simplify it */
488 : do
489 : {
490 6098 : uInt avail_in_before = TIFF_CLAMP_UINT64_TO_INT32_MAX((uint64_t)cc);
491 6098 : sp->stream.avail_in = avail_in_before;
492 6098 : if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK)
493 : {
494 0 : TIFFErrorExtR(tif, module, "Encoder error: %s", SAFE_MSG(sp));
495 0 : return (0);
496 : }
497 6098 : if (sp->stream.avail_out == 0)
498 : {
499 0 : tif->tif_rawcc = tif->tif_rawdatasize;
500 0 : if (!TIFFFlushData1(tif))
501 0 : return 0;
502 0 : sp->stream.next_out = tif->tif_rawdata;
503 0 : sp->stream.avail_out =
504 0 : TIFF_CLAMP_UINT64_TO_INT32_MAX((uint64_t)tif->tif_rawdatasize);
505 : }
506 6098 : cc -= (avail_in_before - sp->stream.avail_in);
507 6098 : } while (cc > 0);
508 6098 : return (1);
509 : }
510 :
511 : /*
512 : * Finish off an encoded strip by flushing the last
513 : * string and tacking on an End Of Information code.
514 : */
515 16540 : static int ZIPPostEncode(TIFF *tif)
516 : {
517 : static const char module[] = "ZIPPostEncode";
518 16540 : ZIPState *sp = ZIPEncoderState(tif);
519 : int state;
520 :
521 : #if LIBDEFLATE_SUPPORT
522 16540 : if (sp->libdeflate_state == 1)
523 12436 : return 1;
524 : #endif
525 :
526 4104 : sp->stream.avail_in = 0;
527 : do
528 : {
529 4104 : state = deflate(&sp->stream, Z_FINISH);
530 4098 : switch (state)
531 : {
532 4098 : case Z_STREAM_END:
533 : case Z_OK:
534 4098 : if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
535 : {
536 4098 : tif->tif_rawcc =
537 4098 : tif->tif_rawdatasize - sp->stream.avail_out;
538 4098 : if (!TIFFFlushData1(tif))
539 0 : return 0;
540 4098 : sp->stream.next_out = tif->tif_rawdata;
541 4098 : sp->stream.avail_out =
542 4098 : (uint64_t)tif->tif_rawdatasize <= 0xFFFFFFFFU
543 4098 : ? (uInt)tif->tif_rawdatasize
544 4098 : : 0xFFFFFFFFU;
545 : }
546 4098 : break;
547 0 : default:
548 0 : TIFFErrorExtR(tif, module, "ZLib error: %s", SAFE_MSG(sp));
549 0 : return (0);
550 : }
551 4098 : } while (state != Z_STREAM_END);
552 4098 : return (1);
553 : }
554 :
555 8264 : static void ZIPCleanup(TIFF *tif)
556 : {
557 8264 : ZIPState *sp = GetZIPState(tif);
558 :
559 8264 : assert(sp != 0);
560 :
561 8264 : (void)TIFFPredictorCleanup(tif);
562 :
563 8264 : tif->tif_tagmethods.vgetfield = sp->vgetparent;
564 8264 : tif->tif_tagmethods.vsetfield = sp->vsetparent;
565 :
566 8264 : if (sp->state & ZSTATE_INIT_ENCODE)
567 : {
568 5729 : deflateEnd(&sp->stream);
569 5729 : sp->state = 0;
570 : }
571 2535 : else if (sp->state & ZSTATE_INIT_DECODE)
572 : {
573 560 : inflateEnd(&sp->stream);
574 560 : sp->state = 0;
575 : }
576 :
577 : #if LIBDEFLATE_SUPPORT
578 8264 : if (sp->libdeflate_dec)
579 505 : libdeflate_free_decompressor(sp->libdeflate_dec);
580 8264 : if (sp->libdeflate_enc)
581 1640 : libdeflate_free_compressor(sp->libdeflate_enc);
582 : #endif
583 :
584 8265 : _TIFFfreeExt(tif, sp);
585 8264 : tif->tif_data = NULL;
586 :
587 8264 : _TIFFSetDefaultCompressionState(tif);
588 8265 : }
589 :
590 56329 : static int ZIPVSetField(TIFF *tif, uint32_t tag, va_list ap)
591 : {
592 : static const char module[] = "ZIPVSetField";
593 56329 : ZIPState *sp = GetZIPState(tif);
594 :
595 56329 : switch (tag)
596 : {
597 48 : case TIFFTAG_ZIPQUALITY:
598 48 : sp->zipquality = (int)va_arg(ap, int);
599 48 : if (sp->zipquality < Z_DEFAULT_COMPRESSION ||
600 48 : sp->zipquality > LIBDEFLATE_MAX_COMPRESSION_LEVEL)
601 : {
602 0 : TIFFErrorExtR(
603 : tif, module,
604 : "Invalid ZipQuality value. Should be in [-1,%d] range",
605 : LIBDEFLATE_MAX_COMPRESSION_LEVEL);
606 0 : return 0;
607 : }
608 :
609 48 : if (sp->state & ZSTATE_INIT_ENCODE)
610 : {
611 0 : int cappedQuality = sp->zipquality;
612 0 : if (cappedQuality > Z_BEST_COMPRESSION)
613 0 : cappedQuality = Z_BEST_COMPRESSION;
614 0 : if (deflateParams(&sp->stream, cappedQuality,
615 : Z_DEFAULT_STRATEGY) != Z_OK)
616 : {
617 0 : TIFFErrorExtR(tif, module, "ZLib error: %s", SAFE_MSG(sp));
618 0 : return (0);
619 : }
620 : }
621 :
622 : #if LIBDEFLATE_SUPPORT
623 48 : if (sp->libdeflate_enc)
624 : {
625 0 : libdeflate_free_compressor(sp->libdeflate_enc);
626 0 : sp->libdeflate_enc = NULL;
627 : }
628 : #endif
629 :
630 48 : return (1);
631 :
632 4097 : case TIFFTAG_DEFLATE_SUBCODEC:
633 4097 : sp->subcodec = (int)va_arg(ap, int);
634 4097 : if (sp->subcodec != DEFLATE_SUBCODEC_ZLIB &&
635 0 : sp->subcodec != DEFLATE_SUBCODEC_LIBDEFLATE)
636 : {
637 0 : TIFFErrorExtR(tif, module, "Invalid DeflateCodec value.");
638 0 : return 0;
639 : }
640 : #if !LIBDEFLATE_SUPPORT
641 : if (sp->subcodec == DEFLATE_SUBCODEC_LIBDEFLATE)
642 : {
643 : TIFFErrorExtR(tif, module,
644 : "DeflateCodec = DEFLATE_SUBCODEC_LIBDEFLATE "
645 : "unsupported in this build");
646 : return 0;
647 : }
648 : #endif
649 4097 : return 1;
650 :
651 52184 : default:
652 52184 : return (*sp->vsetparent)(tif, tag, ap);
653 : }
654 : /*NOTREACHED*/
655 : }
656 :
657 56543 : static int ZIPVGetField(TIFF *tif, uint32_t tag, va_list ap)
658 : {
659 56543 : ZIPState *sp = GetZIPState(tif);
660 :
661 56543 : switch (tag)
662 : {
663 0 : case TIFFTAG_ZIPQUALITY:
664 0 : *va_arg(ap, int *) = sp->zipquality;
665 0 : break;
666 :
667 0 : case TIFFTAG_DEFLATE_SUBCODEC:
668 0 : *va_arg(ap, int *) = sp->subcodec;
669 0 : break;
670 :
671 56543 : default:
672 56543 : return (*sp->vgetparent)(tif, tag, ap);
673 : }
674 0 : return (1);
675 : }
676 :
677 : static const TIFFField zipFields[] = {
678 : {TIFFTAG_ZIPQUALITY, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, FIELD_PSEUDO, TRUE,
679 : FALSE, "", NULL},
680 : {TIFFTAG_DEFLATE_SUBCODEC, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, FIELD_PSEUDO,
681 : TRUE, FALSE, "", NULL},
682 : };
683 :
684 29373 : static void *TIFF_zalloc(void *opaque, unsigned int items, unsigned int size)
685 : {
686 : static const char module[] = "TIFF_zalloc";
687 29373 : TIFF *tif = (TIFF *)opaque;
688 :
689 29373 : if (items > ~(size_t)0 / size)
690 : {
691 0 : TIFFErrorExtR(tif, module, "Overflow");
692 0 : return NULL;
693 : }
694 :
695 29373 : return _TIFFmallocExt(tif, items * size);
696 : }
697 :
698 29372 : static void TIFF_zfree(void *opaque, void *ptr)
699 : {
700 29372 : _TIFFfreeExt((TIFF *)opaque, ptr);
701 29370 : }
702 :
703 8266 : int TIFFInitZIP(TIFF *tif, int scheme)
704 : {
705 : static const char module[] = "TIFFInitZIP";
706 : ZIPState *sp;
707 :
708 8266 : assert((scheme == COMPRESSION_DEFLATE) ||
709 : (scheme == COMPRESSION_ADOBE_DEFLATE));
710 : #ifdef NDEBUG
711 : (void)scheme;
712 : #endif
713 :
714 : /*
715 : * Merge codec-specific tag information.
716 : */
717 8266 : if (!_TIFFMergeFields(tif, zipFields, TIFFArrayCount(zipFields)))
718 : {
719 0 : TIFFErrorExtR(tif, module,
720 : "Merging Deflate codec-specific tags failed");
721 0 : return 0;
722 : }
723 :
724 : /*
725 : * Allocate state block so tag methods have storage to record values.
726 : */
727 8266 : tif->tif_data = (uint8_t *)_TIFFcallocExt(tif, sizeof(ZIPState), 1);
728 8265 : if (tif->tif_data == NULL)
729 0 : goto bad;
730 8265 : sp = GetZIPState(tif);
731 8265 : sp->stream.zalloc = TIFF_zalloc;
732 8265 : sp->stream.zfree = TIFF_zfree;
733 8265 : sp->stream.opaque = tif;
734 8265 : sp->stream.data_type = Z_BINARY;
735 :
736 : /*
737 : * Override parent get/set field methods.
738 : */
739 8265 : sp->vgetparent = tif->tif_tagmethods.vgetfield;
740 8265 : tif->tif_tagmethods.vgetfield = ZIPVGetField; /* hook for codec tags */
741 8265 : sp->vsetparent = tif->tif_tagmethods.vsetfield;
742 8265 : tif->tif_tagmethods.vsetfield = ZIPVSetField; /* hook for codec tags */
743 :
744 : /* Default values for codec-specific fields */
745 8265 : sp->zipquality = Z_DEFAULT_COMPRESSION; /* default comp. level */
746 8265 : sp->state = 0;
747 : #if LIBDEFLATE_SUPPORT
748 8265 : sp->subcodec = DEFLATE_SUBCODEC_LIBDEFLATE;
749 : #else
750 : sp->subcodec = DEFLATE_SUBCODEC_ZLIB;
751 : #endif
752 :
753 : /*
754 : * Install codec methods.
755 : */
756 8265 : tif->tif_fixuptags = ZIPFixupTags;
757 8265 : tif->tif_setupdecode = ZIPSetupDecode;
758 8265 : tif->tif_predecode = ZIPPreDecode;
759 8265 : tif->tif_decoderow = ZIPDecode;
760 8265 : tif->tif_decodestrip = ZIPDecode;
761 8265 : tif->tif_decodetile = ZIPDecode;
762 8265 : tif->tif_setupencode = ZIPSetupEncode;
763 8265 : tif->tif_preencode = ZIPPreEncode;
764 8265 : tif->tif_postencode = ZIPPostEncode;
765 8265 : tif->tif_encoderow = ZIPEncode;
766 8265 : tif->tif_encodestrip = ZIPEncode;
767 8265 : tif->tif_encodetile = ZIPEncode;
768 8265 : tif->tif_cleanup = ZIPCleanup;
769 : /*
770 : * Setup predictor setup.
771 : */
772 8265 : (void)TIFFPredictorInit(tif);
773 8266 : return (1);
774 0 : bad:
775 0 : TIFFErrorExtR(tif, module, "No space for ZIP state block");
776 0 : return (0);
777 : }
778 : #endif /* ZIP_SUPPORT */
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