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 1962 : static int ZIPFixupTags(TIFF *tif)
96 : {
97 : (void)tif;
98 1962 : return (1);
99 : }
100 :
101 460 : static int ZIPSetupDecode(TIFF *tif)
102 : {
103 : static const char module[] = "ZIPSetupDecode";
104 460 : ZIPState *sp = ZIPDecoderState(tif);
105 :
106 460 : assert(sp != NULL);
107 :
108 : /* if we were last encoding, terminate this mode */
109 460 : 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 */
118 920 : if ((sp->state & ZSTATE_INIT_DECODE) == 0 &&
119 461 : inflateInit(&sp->stream) != Z_OK)
120 : {
121 0 : TIFFErrorExtR(tif, module, "%s", SAFE_MSG(sp));
122 0 : return (0);
123 : }
124 : else
125 : {
126 459 : sp->state |= ZSTATE_INIT_DECODE;
127 459 : return (1);
128 : }
129 : }
130 :
131 : /*
132 : * Setup state for decoding a strip.
133 : */
134 3072 : static int ZIPPreDecode(TIFF *tif, uint16_t s)
135 : {
136 3072 : ZIPState *sp = ZIPDecoderState(tif);
137 :
138 : (void)s;
139 3072 : assert(sp != NULL);
140 :
141 3072 : if ((sp->state & ZSTATE_INIT_DECODE) == 0)
142 15 : tif->tif_setupdecode(tif);
143 :
144 : #if LIBDEFLATE_SUPPORT
145 3073 : sp->libdeflate_state = -1;
146 : #endif
147 3073 : sp->stream.next_in = tif->tif_rawdata;
148 : assert(sizeof(sp->stream.avail_in) == 4); /* if this assert gets raised,
149 : we need to simplify this code to reflect a ZLib that is likely updated
150 : to deal with 8byte memory sizes, though this code will respond
151 : appropriately even before we simplify it */
152 6146 : sp->stream.avail_in = (uint64_t)tif->tif_rawcc < 0xFFFFFFFFU
153 3073 : ? (uInt)tif->tif_rawcc
154 3073 : : 0xFFFFFFFFU;
155 3073 : if (inflateReset(&sp->stream) == Z_OK)
156 : {
157 3072 : sp->read_error = 0;
158 3072 : return 1;
159 : }
160 1 : return 0;
161 : }
162 :
163 5072 : static int ZIPDecode(TIFF *tif, uint8_t *op, tmsize_t occ, uint16_t s)
164 : {
165 : static const char module[] = "ZIPDecode";
166 5072 : ZIPState *sp = ZIPDecoderState(tif);
167 :
168 : (void)s;
169 5072 : assert(sp != NULL);
170 5072 : assert(sp->state == ZSTATE_INIT_DECODE);
171 :
172 5072 : if (sp->read_error)
173 : {
174 0 : memset(op, 0, (size_t)occ);
175 0 : TIFFErrorExtR(tif, module,
176 : "ZIPDecode: Scanline %" PRIu32 " cannot be read due to "
177 : "previous error",
178 : tif->tif_row);
179 0 : return 0;
180 : }
181 :
182 : #if LIBDEFLATE_SUPPORT
183 5072 : if (sp->libdeflate_state == 1)
184 0 : return 0;
185 :
186 : /* If we have libdeflate support and we are asked to read a whole */
187 : /* strip/tile, then go for using it */
188 : do
189 : {
190 5072 : TIFFDirectory *td = &tif->tif_dir;
191 :
192 5072 : if (sp->libdeflate_state == 0)
193 2000 : break;
194 3072 : if (sp->subcodec == DEFLATE_SUBCODEC_ZLIB)
195 0 : break;
196 :
197 : /* Check if we are in the situation where we can use libdeflate */
198 3072 : if (isTiled(tif))
199 : {
200 931 : if (TIFFTileSize64(tif) != (uint64_t)occ)
201 144 : break;
202 : }
203 : else
204 : {
205 2141 : uint32_t strip_height = td->td_imagelength - tif->tif_row;
206 2141 : if (strip_height > td->td_rowsperstrip)
207 1484 : strip_height = td->td_rowsperstrip;
208 2141 : if (TIFFVStripSize64(tif, strip_height) != (uint64_t)occ)
209 2 : break;
210 : }
211 :
212 : /* Check for overflow */
213 : if ((size_t)tif->tif_rawcc != (uint64_t)tif->tif_rawcc)
214 : break;
215 : if ((size_t)occ != (uint64_t)occ)
216 : break;
217 :
218 : /* Go for decompression using libdeflate */
219 : {
220 : enum libdeflate_result res;
221 2926 : if (sp->libdeflate_dec == NULL)
222 : {
223 400 : sp->libdeflate_dec = libdeflate_alloc_decompressor();
224 401 : if (sp->libdeflate_dec == NULL)
225 : {
226 0 : break;
227 : }
228 : }
229 :
230 2927 : sp->libdeflate_state = 1;
231 :
232 2927 : res = libdeflate_zlib_decompress(sp->libdeflate_dec, tif->tif_rawcp,
233 2927 : (size_t)tif->tif_rawcc, op,
234 : (size_t)occ, NULL);
235 :
236 2927 : tif->tif_rawcp += tif->tif_rawcc;
237 2927 : tif->tif_rawcc = 0;
238 :
239 : /* We accept LIBDEFLATE_INSUFFICIENT_SPACE has a return */
240 : /* There are odd files in the wild where the last strip, when */
241 : /* it is smaller in height than td_rowsperstrip, actually contains
242 : */
243 : /* data for td_rowsperstrip lines. Just ignore that silently. */
244 2927 : if (res != LIBDEFLATE_SUCCESS &&
245 : res != LIBDEFLATE_INSUFFICIENT_SPACE)
246 : {
247 0 : memset(op, 0, (size_t)occ);
248 0 : TIFFErrorExtR(tif, module, "Decoding error at scanline %lu",
249 0 : (unsigned long)tif->tif_row);
250 0 : sp->read_error = 1;
251 0 : return 0;
252 : }
253 :
254 2927 : return 1;
255 : }
256 : } while (0);
257 2146 : sp->libdeflate_state = 0;
258 : #endif /* LIBDEFLATE_SUPPORT */
259 :
260 2146 : sp->stream.next_in = tif->tif_rawcp;
261 :
262 2146 : sp->stream.next_out = op;
263 : assert(sizeof(sp->stream.avail_out) == 4); /* if this assert gets raised,
264 : we need to simplify this code to reflect a ZLib that is likely updated
265 : to deal with 8byte memory sizes, though this code will respond
266 : appropriately even before we simplify it */
267 : do
268 : {
269 : int state;
270 4292 : uInt avail_in_before = (uint64_t)tif->tif_rawcc <= 0xFFFFFFFFU
271 2146 : ? (uInt)tif->tif_rawcc
272 2146 : : 0xFFFFFFFFU;
273 2146 : uInt avail_out_before =
274 2146 : (uint64_t)occ < 0xFFFFFFFFU ? (uInt)occ : 0xFFFFFFFFU;
275 2146 : sp->stream.avail_in = avail_in_before;
276 2146 : sp->stream.avail_out = avail_out_before;
277 : /* coverity[overrun-buffer-arg] */
278 2146 : state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
279 2146 : tif->tif_rawcc -= (avail_in_before - sp->stream.avail_in);
280 2146 : occ -= (avail_out_before - sp->stream.avail_out);
281 2146 : if (state == Z_STREAM_END)
282 1 : break;
283 2145 : if (state == Z_DATA_ERROR)
284 : {
285 1 : memset(sp->stream.next_out, 0, sp->stream.avail_out);
286 1 : TIFFErrorExtR(tif, module, "Decoding error at scanline %lu, %s",
287 2 : (unsigned long)tif->tif_row, SAFE_MSG(sp));
288 1 : sp->read_error = 1;
289 1 : return (0);
290 : }
291 2144 : if (state != Z_OK)
292 : {
293 0 : memset(sp->stream.next_out, 0, sp->stream.avail_out);
294 0 : TIFFErrorExtR(tif, module, "ZLib error: %s", SAFE_MSG(sp));
295 0 : sp->read_error = 1;
296 0 : return (0);
297 : }
298 2144 : } while (occ > 0);
299 2145 : if (occ != 0)
300 : {
301 0 : TIFFErrorExtR(tif, module,
302 : "Not enough data at scanline %lu (short %" PRIu64
303 : " bytes)",
304 0 : (unsigned long)tif->tif_row, (uint64_t)occ);
305 0 : memset(sp->stream.next_out, 0, sp->stream.avail_out);
306 0 : sp->read_error = 1;
307 0 : return (0);
308 : }
309 :
310 2145 : tif->tif_rawcp = sp->stream.next_in;
311 :
312 2145 : return (1);
313 : }
314 :
315 5631 : static int ZIPSetupEncode(TIFF *tif)
316 : {
317 : static const char module[] = "ZIPSetupEncode";
318 5631 : ZIPState *sp = ZIPEncoderState(tif);
319 : int cappedQuality;
320 :
321 5631 : assert(sp != NULL);
322 5631 : if (sp->state & ZSTATE_INIT_DECODE)
323 : {
324 8 : inflateEnd(&sp->stream);
325 8 : sp->state = 0;
326 : }
327 :
328 5631 : cappedQuality = sp->zipquality;
329 5631 : if (cappedQuality > Z_BEST_COMPRESSION)
330 0 : cappedQuality = Z_BEST_COMPRESSION;
331 :
332 5631 : if (deflateInit(&sp->stream, cappedQuality) != Z_OK)
333 : {
334 0 : TIFFErrorExtR(tif, module, "%s", SAFE_MSG(sp));
335 0 : return (0);
336 : }
337 : else
338 : {
339 5631 : sp->state |= ZSTATE_INIT_ENCODE;
340 5631 : return (1);
341 : }
342 : }
343 :
344 : /*
345 : * Reset encoding state at the start of a strip.
346 : */
347 13157 : static int ZIPPreEncode(TIFF *tif, uint16_t s)
348 : {
349 13157 : ZIPState *sp = ZIPEncoderState(tif);
350 :
351 : (void)s;
352 13157 : assert(sp != NULL);
353 13157 : if (sp->state != ZSTATE_INIT_ENCODE)
354 8 : tif->tif_setupencode(tif);
355 :
356 : #if LIBDEFLATE_SUPPORT
357 13146 : sp->libdeflate_state = -1;
358 : #endif
359 13146 : sp->stream.next_out = tif->tif_rawdata;
360 : assert(sizeof(sp->stream.avail_out) == 4); /* if this assert gets raised,
361 : we need to simplify this code to reflect a ZLib that is likely updated
362 : to deal with 8byte memory sizes, though this code will respond
363 : appropriately even before we simplify it */
364 26292 : sp->stream.avail_out = (uint64_t)tif->tif_rawdatasize <= 0xFFFFFFFFU
365 13144 : ? (uInt)tif->tif_rawdatasize
366 13146 : : 0xFFFFFFFFU;
367 13146 : return (deflateReset(&sp->stream) == Z_OK);
368 : }
369 :
370 : /*
371 : * Encode a chunk of pixels.
372 : */
373 15157 : static int ZIPEncode(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
374 : {
375 : static const char module[] = "ZIPEncode";
376 15157 : ZIPState *sp = ZIPEncoderState(tif);
377 :
378 15157 : assert(sp != NULL);
379 15157 : assert(sp->state == ZSTATE_INIT_ENCODE);
380 :
381 : (void)s;
382 :
383 : #if LIBDEFLATE_SUPPORT
384 15157 : if (sp->libdeflate_state == 1)
385 0 : return 0;
386 :
387 : /* If we have libdeflate support and we are asked to write a whole */
388 : /* strip/tile, then go for using it */
389 : do
390 : {
391 15157 : TIFFDirectory *td = &tif->tif_dir;
392 :
393 15157 : if (sp->libdeflate_state == 0)
394 2000 : break;
395 13157 : if (sp->subcodec == DEFLATE_SUBCODEC_ZLIB)
396 4097 : break;
397 :
398 : /* Libdeflate does not support the 0-compression level */
399 9060 : if (sp->zipquality == Z_NO_COMPRESSION)
400 0 : break;
401 :
402 : /* Check if we are in the situation where we can use libdeflate */
403 9060 : if (isTiled(tif))
404 : {
405 5682 : if (TIFFTileSize64(tif) != (uint64_t)cc)
406 0 : break;
407 : }
408 : else
409 : {
410 3378 : uint32_t strip_height = td->td_imagelength - tif->tif_row;
411 3378 : if (strip_height > td->td_rowsperstrip)
412 2018 : strip_height = td->td_rowsperstrip;
413 3378 : if (TIFFVStripSize64(tif, strip_height) != (uint64_t)cc)
414 1 : break;
415 : }
416 :
417 : /* Check for overflow */
418 : if ((size_t)tif->tif_rawdatasize != (uint64_t)tif->tif_rawdatasize)
419 : break;
420 : if ((size_t)cc != (uint64_t)cc)
421 : break;
422 :
423 : /* Go for compression using libdeflate */
424 : {
425 : size_t nCompressedBytes;
426 9060 : if (sp->libdeflate_enc == NULL)
427 : {
428 : /* To get results as good as zlib, we asked for an extra */
429 : /* level of compression */
430 1528 : sp->libdeflate_enc = libdeflate_alloc_compressor(
431 1528 : sp->zipquality == Z_DEFAULT_COMPRESSION ? 7
432 12 : : sp->zipquality >= 6 && sp->zipquality <= 9
433 12 : ? sp->zipquality + 1
434 32 : : sp->zipquality);
435 1526 : if (sp->libdeflate_enc == NULL)
436 : {
437 0 : TIFFErrorExtR(tif, module, "Cannot allocate compressor");
438 0 : break;
439 : }
440 : }
441 :
442 : /* Make sure the output buffer is large enough for the worse case.
443 : */
444 : /* In TIFFWriteBufferSetup(), when libtiff allocates the buffer */
445 : /* we've taken a 10% margin over the uncompressed size, which should
446 : */
447 : /* be large enough even for the the worse case scenario. */
448 9058 : if (libdeflate_zlib_compress_bound(sp->libdeflate_enc, (size_t)cc) >
449 9060 : (size_t)tif->tif_rawdatasize)
450 : {
451 0 : break;
452 : }
453 :
454 9060 : sp->libdeflate_state = 1;
455 9060 : nCompressedBytes = libdeflate_zlib_compress(
456 9060 : sp->libdeflate_enc, bp, (size_t)cc, tif->tif_rawdata,
457 9060 : (size_t)tif->tif_rawdatasize);
458 :
459 9056 : if (nCompressedBytes == 0)
460 : {
461 0 : TIFFErrorExtR(tif, module, "Encoder error at scanline %lu",
462 0 : (unsigned long)tif->tif_row);
463 0 : return 0;
464 : }
465 :
466 9056 : tif->tif_rawcc = nCompressedBytes;
467 :
468 9056 : if (!TIFFFlushData1(tif))
469 0 : return 0;
470 :
471 9058 : return 1;
472 : }
473 : } while (0);
474 6098 : sp->libdeflate_state = 0;
475 : #endif /* LIBDEFLATE_SUPPORT */
476 :
477 6098 : sp->stream.next_in = bp;
478 : assert(sizeof(sp->stream.avail_in) == 4); /* if this assert gets raised,
479 : we need to simplify this code to reflect a ZLib that is likely updated
480 : to deal with 8byte memory sizes, though this code will respond
481 : appropriately even before we simplify it */
482 : do
483 : {
484 6098 : uInt avail_in_before =
485 6098 : (uint64_t)cc <= 0xFFFFFFFFU ? (uInt)cc : 0xFFFFFFFFU;
486 6098 : sp->stream.avail_in = avail_in_before;
487 : /* coverity[overrun-buffer-arg] */
488 6098 : if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK)
489 : {
490 0 : TIFFErrorExtR(tif, module, "Encoder error: %s", SAFE_MSG(sp));
491 0 : return (0);
492 : }
493 6098 : if (sp->stream.avail_out == 0)
494 : {
495 0 : tif->tif_rawcc = tif->tif_rawdatasize;
496 0 : if (!TIFFFlushData1(tif))
497 0 : return 0;
498 0 : sp->stream.next_out = tif->tif_rawdata;
499 0 : sp->stream.avail_out = (uint64_t)tif->tif_rawdatasize <= 0xFFFFFFFFU
500 0 : ? (uInt)tif->tif_rawdatasize
501 0 : : 0xFFFFFFFFU;
502 : }
503 6098 : cc -= (avail_in_before - sp->stream.avail_in);
504 6098 : } while (cc > 0);
505 6098 : return (1);
506 : }
507 :
508 : /*
509 : * Finish off an encoded strip by flushing the last
510 : * string and tacking on an End Of Information code.
511 : */
512 13156 : static int ZIPPostEncode(TIFF *tif)
513 : {
514 : static const char module[] = "ZIPPostEncode";
515 13156 : ZIPState *sp = ZIPEncoderState(tif);
516 : int state;
517 :
518 : #if LIBDEFLATE_SUPPORT
519 13156 : if (sp->libdeflate_state == 1)
520 9056 : return 1;
521 : #endif
522 :
523 4100 : sp->stream.avail_in = 0;
524 : do
525 : {
526 4100 : state = deflate(&sp->stream, Z_FINISH);
527 4098 : switch (state)
528 : {
529 4098 : case Z_STREAM_END:
530 : case Z_OK:
531 4098 : if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
532 : {
533 4098 : tif->tif_rawcc =
534 4098 : tif->tif_rawdatasize - sp->stream.avail_out;
535 4098 : if (!TIFFFlushData1(tif))
536 0 : return 0;
537 4098 : sp->stream.next_out = tif->tif_rawdata;
538 4098 : sp->stream.avail_out =
539 4098 : (uint64_t)tif->tif_rawdatasize <= 0xFFFFFFFFU
540 4098 : ? (uInt)tif->tif_rawdatasize
541 4098 : : 0xFFFFFFFFU;
542 : }
543 4098 : break;
544 0 : default:
545 0 : TIFFErrorExtR(tif, module, "ZLib error: %s", SAFE_MSG(sp));
546 0 : return (0);
547 : }
548 4098 : } while (state != Z_STREAM_END);
549 4098 : return (1);
550 : }
551 :
552 7683 : static void ZIPCleanup(TIFF *tif)
553 : {
554 7683 : ZIPState *sp = GetZIPState(tif);
555 :
556 7683 : assert(sp != 0);
557 :
558 7683 : (void)TIFFPredictorCleanup(tif);
559 :
560 7684 : tif->tif_tagmethods.vgetfield = sp->vgetparent;
561 7684 : tif->tif_tagmethods.vsetfield = sp->vsetparent;
562 :
563 7684 : if (sp->state & ZSTATE_INIT_ENCODE)
564 : {
565 5615 : deflateEnd(&sp->stream);
566 5614 : sp->state = 0;
567 : }
568 2069 : else if (sp->state & ZSTATE_INIT_DECODE)
569 : {
570 453 : inflateEnd(&sp->stream);
571 453 : sp->state = 0;
572 : }
573 :
574 : #if LIBDEFLATE_SUPPORT
575 7683 : if (sp->libdeflate_dec)
576 401 : libdeflate_free_decompressor(sp->libdeflate_dec);
577 7683 : if (sp->libdeflate_enc)
578 1527 : libdeflate_free_compressor(sp->libdeflate_enc);
579 : #endif
580 :
581 7683 : _TIFFfreeExt(tif, sp);
582 7683 : tif->tif_data = NULL;
583 :
584 7683 : _TIFFSetDefaultCompressionState(tif);
585 7684 : }
586 :
587 51311 : static int ZIPVSetField(TIFF *tif, uint32_t tag, va_list ap)
588 : {
589 : static const char module[] = "ZIPVSetField";
590 51311 : ZIPState *sp = GetZIPState(tif);
591 :
592 51311 : switch (tag)
593 : {
594 48 : case TIFFTAG_ZIPQUALITY:
595 48 : sp->zipquality = (int)va_arg(ap, int);
596 48 : if (sp->zipquality < Z_DEFAULT_COMPRESSION ||
597 48 : sp->zipquality > LIBDEFLATE_MAX_COMPRESSION_LEVEL)
598 : {
599 0 : TIFFErrorExtR(
600 : tif, module,
601 : "Invalid ZipQuality value. Should be in [-1,%d] range",
602 : LIBDEFLATE_MAX_COMPRESSION_LEVEL);
603 0 : return 0;
604 : }
605 :
606 48 : if (sp->state & ZSTATE_INIT_ENCODE)
607 : {
608 0 : int cappedQuality = sp->zipquality;
609 0 : if (cappedQuality > Z_BEST_COMPRESSION)
610 0 : cappedQuality = Z_BEST_COMPRESSION;
611 0 : if (deflateParams(&sp->stream, cappedQuality,
612 : Z_DEFAULT_STRATEGY) != Z_OK)
613 : {
614 0 : TIFFErrorExtR(tif, module, "ZLib error: %s", SAFE_MSG(sp));
615 0 : return (0);
616 : }
617 : }
618 :
619 : #if LIBDEFLATE_SUPPORT
620 48 : if (sp->libdeflate_enc)
621 : {
622 0 : libdeflate_free_compressor(sp->libdeflate_enc);
623 0 : sp->libdeflate_enc = NULL;
624 : }
625 : #endif
626 :
627 48 : return (1);
628 :
629 4097 : case TIFFTAG_DEFLATE_SUBCODEC:
630 4097 : sp->subcodec = (int)va_arg(ap, int);
631 4097 : if (sp->subcodec != DEFLATE_SUBCODEC_ZLIB &&
632 0 : sp->subcodec != DEFLATE_SUBCODEC_LIBDEFLATE)
633 : {
634 0 : TIFFErrorExtR(tif, module, "Invalid DeflateCodec value.");
635 0 : return 0;
636 : }
637 : #if !LIBDEFLATE_SUPPORT
638 : if (sp->subcodec == DEFLATE_SUBCODEC_LIBDEFLATE)
639 : {
640 : TIFFErrorExtR(tif, module,
641 : "DeflateCodec = DEFLATE_SUBCODEC_LIBDEFLATE "
642 : "unsupported in this build");
643 : return 0;
644 : }
645 : #endif
646 4097 : return 1;
647 :
648 47166 : default:
649 47166 : return (*sp->vsetparent)(tif, tag, ap);
650 : }
651 : /*NOTREACHED*/
652 : }
653 :
654 48596 : static int ZIPVGetField(TIFF *tif, uint32_t tag, va_list ap)
655 : {
656 48596 : ZIPState *sp = GetZIPState(tif);
657 :
658 48596 : switch (tag)
659 : {
660 0 : case TIFFTAG_ZIPQUALITY:
661 0 : *va_arg(ap, int *) = sp->zipquality;
662 0 : break;
663 :
664 0 : case TIFFTAG_DEFLATE_SUBCODEC:
665 0 : *va_arg(ap, int *) = sp->subcodec;
666 0 : break;
667 :
668 48596 : default:
669 48596 : return (*sp->vgetparent)(tif, tag, ap);
670 : }
671 0 : return (1);
672 : }
673 :
674 : static const TIFFField zipFields[] = {
675 : {TIFFTAG_ZIPQUALITY, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT,
676 : TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, TRUE, FALSE, "", NULL},
677 : {TIFFTAG_DEFLATE_SUBCODEC, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT,
678 : TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, TRUE, FALSE, "", NULL},
679 : };
680 :
681 7685 : int TIFFInitZIP(TIFF *tif, int scheme)
682 : {
683 : static const char module[] = "TIFFInitZIP";
684 : ZIPState *sp;
685 :
686 7685 : assert((scheme == COMPRESSION_DEFLATE) ||
687 : (scheme == COMPRESSION_ADOBE_DEFLATE));
688 : #ifdef NDEBUG
689 : (void)scheme;
690 : #endif
691 :
692 : /*
693 : * Merge codec-specific tag information.
694 : */
695 7685 : if (!_TIFFMergeFields(tif, zipFields, TIFFArrayCount(zipFields)))
696 : {
697 0 : TIFFErrorExtR(tif, module,
698 : "Merging Deflate codec-specific tags failed");
699 0 : return 0;
700 : }
701 :
702 : /*
703 : * Allocate state block so tag methods have storage to record values.
704 : */
705 7685 : tif->tif_data = (uint8_t *)_TIFFcallocExt(tif, sizeof(ZIPState), 1);
706 7685 : if (tif->tif_data == NULL)
707 0 : goto bad;
708 7685 : sp = GetZIPState(tif);
709 7685 : sp->stream.zalloc = NULL;
710 7685 : sp->stream.zfree = NULL;
711 7685 : sp->stream.opaque = NULL;
712 7685 : sp->stream.data_type = Z_BINARY;
713 :
714 : /*
715 : * Override parent get/set field methods.
716 : */
717 7685 : sp->vgetparent = tif->tif_tagmethods.vgetfield;
718 7685 : tif->tif_tagmethods.vgetfield = ZIPVGetField; /* hook for codec tags */
719 7685 : sp->vsetparent = tif->tif_tagmethods.vsetfield;
720 7685 : tif->tif_tagmethods.vsetfield = ZIPVSetField; /* hook for codec tags */
721 :
722 : /* Default values for codec-specific fields */
723 7685 : sp->zipquality = Z_DEFAULT_COMPRESSION; /* default comp. level */
724 7685 : sp->state = 0;
725 : #if LIBDEFLATE_SUPPORT
726 7685 : sp->subcodec = DEFLATE_SUBCODEC_LIBDEFLATE;
727 : #else
728 : sp->subcodec = DEFLATE_SUBCODEC_ZLIB;
729 : #endif
730 :
731 : /*
732 : * Install codec methods.
733 : */
734 7685 : tif->tif_fixuptags = ZIPFixupTags;
735 7685 : tif->tif_setupdecode = ZIPSetupDecode;
736 7685 : tif->tif_predecode = ZIPPreDecode;
737 7685 : tif->tif_decoderow = ZIPDecode;
738 7685 : tif->tif_decodestrip = ZIPDecode;
739 7685 : tif->tif_decodetile = ZIPDecode;
740 7685 : tif->tif_setupencode = ZIPSetupEncode;
741 7685 : tif->tif_preencode = ZIPPreEncode;
742 7685 : tif->tif_postencode = ZIPPostEncode;
743 7685 : tif->tif_encoderow = ZIPEncode;
744 7685 : tif->tif_encodestrip = ZIPEncode;
745 7685 : tif->tif_encodetile = ZIPEncode;
746 7685 : tif->tif_cleanup = ZIPCleanup;
747 : /*
748 : * Setup predictor setup.
749 : */
750 7685 : (void)TIFFPredictorInit(tif);
751 7685 : return (1);
752 0 : bad:
753 0 : TIFFErrorExtR(tif, module, "No space for ZIP state block");
754 0 : return (0);
755 : }
756 : #endif /* ZIP_SUPPORT */
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