source: liacs/MIR2010/SourceCode/cximage/tiff/tif_zip.c@ 253

Last change on this file since 253 was 95, checked in by Rick van der Zwet, 15 years ago

Bad boy, improper move of directory
File size: 10.1 KB
RevLine 
[95]1/* $Id: tif_zip.c,v 1.10 2006/03/16 12:38:24 dron Exp $ */
2
3/*
4 * Copyright (c) 1995-1997 Sam Leffler
5 * Copyright (c) 1995-1997 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#include "tiffiop.h"
28#ifdef ZIP_SUPPORT
29/*
30 * TIFF Library.
31 *
32 * ZIP (aka Deflate) Compression Support
33 *
34 * This file is simply an interface to the zlib library written by
35 * Jean-loup Gailly and Mark Adler. You must use version 1.0 or later
36 * of the library: this code assumes the 1.0 API and also depends on
37 * the ability to write the zlib header multiple times (one per strip)
38 * which was not possible with versions prior to 0.95. Note also that
39 * older versions of this codec avoided this bug by supressing the header
40 * entirely. This means that files written with the old library cannot
41 * be read; they should be converted to a different compression scheme
42 * and then reconverted.
43 *
44 * The data format used by the zlib library is described in the files
45 * zlib-3.1.doc, deflate-1.1.doc and gzip-4.1.doc, available in the
46 * directory ftp://ftp.uu.net/pub/archiving/zip/doc. The library was
47 * last found at ftp://ftp.uu.net/pub/archiving/zip/zlib/zlib-0.99.tar.gz.
48 */
49#include "tif_predict.h"
50// BT: edit path
51#include "../zlib/zlib.h"
52
53#include <stdio.h>
54
55/*
56 * Sigh, ZLIB_VERSION is defined as a string so there's no
57 * way to do a proper check here. Instead we guess based
58 * on the presence of #defines that were added between the
59 * 0.95 and 1.0 distributions.
60 */
61#if !defined(Z_NO_COMPRESSION) || !defined(Z_DEFLATED)
62#error "Antiquated ZLIB software; you must use version 1.0 or later"
63#endif
64
65/*
66 * State block for each open TIFF
67 * file using ZIP compression/decompression.
68 */
69typedef struct {
70 TIFFPredictorState predict;
71 z_stream stream;
72 int zipquality; /* compression level */
73 int state; /* state flags */
74#define ZSTATE_INIT 0x1 /* zlib setup successfully */
75
76 TIFFVGetMethod vgetparent; /* super-class method */
77 TIFFVSetMethod vsetparent; /* super-class method */
78} ZIPState;
79
80#define ZState(tif) ((ZIPState*) (tif)->tif_data)
81#define DecoderState(tif) ZState(tif)
82#define EncoderState(tif) ZState(tif)
83
84static int ZIPEncode(TIFF*, tidata_t, tsize_t, tsample_t);
85static int ZIPDecode(TIFF*, tidata_t, tsize_t, tsample_t);
86
87static int
88ZIPSetupDecode(TIFF* tif)
89{
90 ZIPState* sp = DecoderState(tif);
91 static const char module[] = "ZIPSetupDecode";
92
93 assert(sp != NULL);
94 if (inflateInit(&sp->stream) != Z_OK) {
95 TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg);
96 return (0);
97 } else {
98 sp->state |= ZSTATE_INIT;
99 return (1);
100 }
101}
102
103/*
104 * Setup state for decoding a strip.
105 */
106static int
107ZIPPreDecode(TIFF* tif, tsample_t s)
108{
109 ZIPState* sp = DecoderState(tif);
110
111 (void) s;
112 assert(sp != NULL);
113 sp->stream.next_in = tif->tif_rawdata;
114 sp->stream.avail_in = tif->tif_rawcc;
115 return (inflateReset(&sp->stream) == Z_OK);
116}
117
118static int
119ZIPDecode(TIFF* tif, tidata_t op, tsize_t occ, tsample_t s)
120{
121 ZIPState* sp = DecoderState(tif);
122 static const char module[] = "ZIPDecode";
123
124 (void) s;
125 assert(sp != NULL);
126 sp->stream.next_out = op;
127 sp->stream.avail_out = occ;
128 do {
129 int state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
130 if (state == Z_STREAM_END)
131 break;
132 if (state == Z_DATA_ERROR) {
133 TIFFErrorExt(tif->tif_clientdata, module,
134 "%s: Decoding error at scanline %d, %s",
135 tif->tif_name, tif->tif_row, sp->stream.msg);
136 if (inflateSync(&sp->stream) != Z_OK)
137 return (0);
138 continue;
139 }
140 if (state != Z_OK) {
141 TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s",
142 tif->tif_name, sp->stream.msg);
143 return (0);
144 }
145 } while (sp->stream.avail_out > 0);
146 if (sp->stream.avail_out != 0) {
147 TIFFErrorExt(tif->tif_clientdata, module,
148 "%s: Not enough data at scanline %d (short %d bytes)",
149 tif->tif_name, tif->tif_row, sp->stream.avail_out);
150 return (0);
151 }
152 return (1);
153}
154
155static int
156ZIPSetupEncode(TIFF* tif)
157{
158 ZIPState* sp = EncoderState(tif);
159 static const char module[] = "ZIPSetupEncode";
160
161 assert(sp != NULL);
162 if (deflateInit(&sp->stream, sp->zipquality) != Z_OK) {
163 TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg);
164 return (0);
165 } else {
166 sp->state |= ZSTATE_INIT;
167 return (1);
168 }
169}
170
171/*
172 * Reset encoding state at the start of a strip.
173 */
174static int
175ZIPPreEncode(TIFF* tif, tsample_t s)
176{
177 ZIPState *sp = EncoderState(tif);
178
179 (void) s;
180 assert(sp != NULL);
181 sp->stream.next_out = tif->tif_rawdata;
182 sp->stream.avail_out = tif->tif_rawdatasize;
183 return (deflateReset(&sp->stream) == Z_OK);
184}
185
186/*
187 * Encode a chunk of pixels.
188 */
189static int
190ZIPEncode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
191{
192 ZIPState *sp = EncoderState(tif);
193 static const char module[] = "ZIPEncode";
194
195 (void) s;
196 sp->stream.next_in = bp;
197 sp->stream.avail_in = cc;
198 do {
199 if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) {
200 TIFFErrorExt(tif->tif_clientdata, module, "%s: Encoder error: %s",
201 tif->tif_name, sp->stream.msg);
202 return (0);
203 }
204 if (sp->stream.avail_out == 0) {
205 tif->tif_rawcc = tif->tif_rawdatasize;
206 TIFFFlushData1(tif);
207 sp->stream.next_out = tif->tif_rawdata;
208 sp->stream.avail_out = tif->tif_rawdatasize;
209 }
210 } while (sp->stream.avail_in > 0);
211 return (1);
212}
213
214/*
215 * Finish off an encoded strip by flushing the last
216 * string and tacking on an End Of Information code.
217 */
218static int
219ZIPPostEncode(TIFF* tif)
220{
221 ZIPState *sp = EncoderState(tif);
222 static const char module[] = "ZIPPostEncode";
223 int state;
224
225 sp->stream.avail_in = 0;
226 do {
227 state = deflate(&sp->stream, Z_FINISH);
228 switch (state) {
229 case Z_STREAM_END:
230 case Z_OK:
231 if ((int)sp->stream.avail_out != (int)tif->tif_rawdatasize)
232 {
233 tif->tif_rawcc =
234 tif->tif_rawdatasize - sp->stream.avail_out;
235 TIFFFlushData1(tif);
236 sp->stream.next_out = tif->tif_rawdata;
237 sp->stream.avail_out = tif->tif_rawdatasize;
238 }
239 break;
240 default:
241 TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s",
242 tif->tif_name, sp->stream.msg);
243 return (0);
244 }
245 } while (state != Z_STREAM_END);
246 return (1);
247}
248
249static void
250ZIPCleanup(TIFF* tif)
251{
252 ZIPState* sp = ZState(tif);
253
254 assert(sp != 0);
255
256 (void)TIFFPredictorCleanup(tif);
257
258 tif->tif_tagmethods.vgetfield = sp->vgetparent;
259 tif->tif_tagmethods.vsetfield = sp->vsetparent;
260
261 if (sp->state&ZSTATE_INIT) {
262 /* NB: avoid problems in the library */
263 if (tif->tif_mode == O_RDONLY)
264 inflateEnd(&sp->stream);
265 else
266 deflateEnd(&sp->stream);
267 }
268 _TIFFfree(sp);
269 tif->tif_data = NULL;
270
271 _TIFFSetDefaultCompressionState(tif);
272}
273
274static int
275ZIPVSetField(TIFF* tif, ttag_t tag, va_list ap)
276{
277 ZIPState* sp = ZState(tif);
278 static const char module[] = "ZIPVSetField";
279
280 switch (tag) {
281 case TIFFTAG_ZIPQUALITY:
282 sp->zipquality = va_arg(ap, int);
283 if (tif->tif_mode != O_RDONLY && (sp->state&ZSTATE_INIT)) {
284 if (deflateParams(&sp->stream,
285 sp->zipquality, Z_DEFAULT_STRATEGY) != Z_OK) {
286 TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s",
287 tif->tif_name, sp->stream.msg);
288 return (0);
289 }
290 }
291 return (1);
292 default:
293 return (*sp->vsetparent)(tif, tag, ap);
294 }
295 /*NOTREACHED*/
296}
297
298static int
299ZIPVGetField(TIFF* tif, ttag_t tag, va_list ap)
300{
301 ZIPState* sp = ZState(tif);
302
303 switch (tag) {
304 case TIFFTAG_ZIPQUALITY:
305 *va_arg(ap, int*) = sp->zipquality;
306 break;
307 default:
308 return (*sp->vgetparent)(tif, tag, ap);
309 }
310 return (1);
311}
312
313static const TIFFFieldInfo zipFieldInfo[] = {
314 { TIFFTAG_ZIPQUALITY, 0, 0, TIFF_ANY, FIELD_PSEUDO,
315 TRUE, FALSE, "" },
316};
317
318int
319TIFFInitZIP(TIFF* tif, int scheme)
320{
321 ZIPState* sp;
322
323 assert( (scheme == COMPRESSION_DEFLATE)
324 || (scheme == COMPRESSION_ADOBE_DEFLATE));
325
326 /*
327 * Allocate state block so tag methods have storage to record values.
328 */
329 tif->tif_data = (tidata_t) _TIFFmalloc(sizeof (ZIPState));
330 if (tif->tif_data == NULL)
331 goto bad;
332 sp = ZState(tif);
333 sp->stream.zalloc = NULL;
334 sp->stream.zfree = NULL;
335 sp->stream.opaque = NULL;
336 sp->stream.data_type = Z_BINARY;
337
338 /*
339 * Merge codec-specific tag information and
340 * override parent get/set field methods.
341 */
342 _TIFFMergeFieldInfo(tif, zipFieldInfo, TIFFArrayCount(zipFieldInfo));
343 sp->vgetparent = tif->tif_tagmethods.vgetfield;
344 tif->tif_tagmethods.vgetfield = ZIPVGetField; /* hook for codec tags */
345 sp->vsetparent = tif->tif_tagmethods.vsetfield;
346 tif->tif_tagmethods.vsetfield = ZIPVSetField; /* hook for codec tags */
347
348 /* Default values for codec-specific fields */
349 sp->zipquality = Z_DEFAULT_COMPRESSION; /* default comp. level */
350 sp->state = 0;
351
352 /*
353 * Install codec methods.
354 */
355 tif->tif_setupdecode = ZIPSetupDecode;
356 tif->tif_predecode = ZIPPreDecode;
357 tif->tif_decoderow = ZIPDecode;
358 tif->tif_decodestrip = ZIPDecode;
359 tif->tif_decodetile = ZIPDecode;
360 tif->tif_setupencode = ZIPSetupEncode;
361 tif->tif_preencode = ZIPPreEncode;
362 tif->tif_postencode = ZIPPostEncode;
363 tif->tif_encoderow = ZIPEncode;
364 tif->tif_encodestrip = ZIPEncode;
365 tif->tif_encodetile = ZIPEncode;
366 tif->tif_cleanup = ZIPCleanup;
367 /*
368 * Setup predictor setup.
369 */
370 (void) TIFFPredictorInit(tif);
371 return (1);
372bad:
373 TIFFErrorExt(tif->tif_clientdata, "TIFFInitZIP",
374 "No space for ZIP state block");
375 return (0);
376}
377#endif /* ZIP_SUPORT */
378
379/* vim: set ts=8 sts=8 sw=8 noet: */
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