source: liacs/MIR2010/SourceCode/cximage/tiff/tif_compress.c@ 121

Last change on this file since 121 was 95, checked in by Rick van der Zwet, 15 years ago

Bad boy, improper move of directory
File size: 7.6 KB
RevLine 
[95]1/* $Id: tif_compress.c,v 1.11 2005/12/21 12:23:13 joris Exp $ */
2
3/*
4 * Copyright (c) 1988-1997 Sam Leffler
5 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and
8 * its documentation for any purpose is hereby granted without fee, provided
9 * that (i) the above copyright notices and this permission notice appear in
10 * all copies of the software and related documentation, and (ii) the names of
11 * Sam Leffler and Silicon Graphics may not be used in any advertising or
12 * publicity relating to the software without the specific, prior written
13 * permission of Sam Leffler and Silicon Graphics.
14 *
15 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18 *
19 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 */
26
27/*
28 * TIFF Library
29 *
30 * Compression Scheme Configuration Support.
31 */
32#include "tiffiop.h"
33
34static int
35TIFFNoEncode(TIFF* tif, const char* method)
36{
37 const TIFFCodec* c = TIFFFindCODEC(tif->tif_dir.td_compression);
38
39 if (c) {
40 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%s %s encoding is not implemented",
41 c->name, method);
42 } else {
43 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
44 "Compression scheme %u %s encoding is not implemented",
45 tif->tif_dir.td_compression, method);
46 }
47 return (-1);
48}
49
50int
51_TIFFNoRowEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
52{
53 (void) pp; (void) cc; (void) s;
54 return (TIFFNoEncode(tif, "scanline"));
55}
56
57int
58_TIFFNoStripEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
59{
60 (void) pp; (void) cc; (void) s;
61 return (TIFFNoEncode(tif, "strip"));
62}
63
64int
65_TIFFNoTileEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
66{
67 (void) pp; (void) cc; (void) s;
68 return (TIFFNoEncode(tif, "tile"));
69}
70
71static int
72TIFFNoDecode(TIFF* tif, const char* method)
73{
74 const TIFFCodec* c = TIFFFindCODEC(tif->tif_dir.td_compression);
75
76 if (c)
77 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%s %s decoding is not implemented",
78 c->name, method);
79 else
80 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
81 "Compression scheme %u %s decoding is not implemented",
82 tif->tif_dir.td_compression, method);
83 return (-1);
84}
85
86int
87_TIFFNoRowDecode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
88{
89 (void) pp; (void) cc; (void) s;
90 return (TIFFNoDecode(tif, "scanline"));
91}
92
93int
94_TIFFNoStripDecode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
95{
96 (void) pp; (void) cc; (void) s;
97 return (TIFFNoDecode(tif, "strip"));
98}
99
100int
101_TIFFNoTileDecode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
102{
103 (void) pp; (void) cc; (void) s;
104 return (TIFFNoDecode(tif, "tile"));
105}
106
107int
108_TIFFNoSeek(TIFF* tif, uint32 off)
109{
110 (void) off;
111 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
112 "Compression algorithm does not support random access");
113 return (0);
114}
115
116int
117_TIFFNoPreCode(TIFF* tif, tsample_t s)
118{
119 (void) tif; (void) s;
120 return (1);
121}
122
123static int _TIFFtrue(TIFF* tif) { (void) tif; return (1); }
124static void _TIFFvoid(TIFF* tif) { (void) tif; }
125
126void
127_TIFFSetDefaultCompressionState(TIFF* tif)
128{
129 tif->tif_decodestatus = TRUE;
130 tif->tif_setupdecode = _TIFFtrue;
131 tif->tif_predecode = _TIFFNoPreCode;
132 tif->tif_decoderow = _TIFFNoRowDecode;
133 tif->tif_decodestrip = _TIFFNoStripDecode;
134 tif->tif_decodetile = _TIFFNoTileDecode;
135 tif->tif_encodestatus = TRUE;
136 tif->tif_setupencode = _TIFFtrue;
137 tif->tif_preencode = _TIFFNoPreCode;
138 tif->tif_postencode = _TIFFtrue;
139 tif->tif_encoderow = _TIFFNoRowEncode;
140 tif->tif_encodestrip = _TIFFNoStripEncode;
141 tif->tif_encodetile = _TIFFNoTileEncode;
142 tif->tif_close = _TIFFvoid;
143 tif->tif_seek = _TIFFNoSeek;
144 tif->tif_cleanup = _TIFFvoid;
145 tif->tif_defstripsize = _TIFFDefaultStripSize;
146 tif->tif_deftilesize = _TIFFDefaultTileSize;
147 tif->tif_flags &= ~TIFF_NOBITREV;
148}
149
150int
151TIFFSetCompressionScheme(TIFF* tif, int scheme)
152{
153 const TIFFCodec *c = TIFFFindCODEC((uint16) scheme);
154
155 _TIFFSetDefaultCompressionState(tif);
156 /*
157 * Don't treat an unknown compression scheme as an error.
158 * This permits applications to open files with data that
159 * the library does not have builtin support for, but which
160 * may still be meaningful.
161 */
162 return (c ? (*c->init)(tif, scheme) : 1);
163}
164
165/*
166 * Other compression schemes may be registered. Registered
167 * schemes can also override the builtin versions provided
168 * by this library.
169 */
170typedef struct _codec {
171 struct _codec* next;
172 TIFFCodec* info;
173} codec_t;
174static codec_t* registeredCODECS = NULL;
175
176const TIFFCodec*
177TIFFFindCODEC(uint16 scheme)
178{
179 const TIFFCodec* c;
180 codec_t* cd;
181
182 for (cd = registeredCODECS; cd; cd = cd->next)
183 if (cd->info->scheme == scheme)
184 return ((const TIFFCodec*) cd->info);
185 for (c = _TIFFBuiltinCODECS; c->name; c++)
186 if (c->scheme == scheme)
187 return (c);
188 return ((const TIFFCodec*) 0);
189}
190
191TIFFCodec*
192TIFFRegisterCODEC(uint16 scheme, const char* name, TIFFInitMethod init)
193{
194 codec_t* cd = (codec_t*)
195 _TIFFmalloc(sizeof (codec_t) + sizeof (TIFFCodec) + strlen(name)+1);
196
197 if (cd != NULL) {
198 cd->info = (TIFFCodec*) ((tidata_t) cd + sizeof (codec_t));
199 cd->info->name = (char*)
200 ((tidata_t) cd->info + sizeof (TIFFCodec));
201 strcpy(cd->info->name, name);
202 cd->info->scheme = scheme;
203 cd->info->init = init;
204 cd->next = registeredCODECS;
205 registeredCODECS = cd;
206 } else {
207 TIFFErrorExt(0, "TIFFRegisterCODEC",
208 "No space to register compression scheme %s", name);
209 return NULL;
210 }
211 return (cd->info);
212}
213
214void
215TIFFUnRegisterCODEC(TIFFCodec* c)
216{
217 codec_t* cd;
218 codec_t** pcd;
219
220 for (pcd = &registeredCODECS; (cd = *pcd); pcd = &cd->next)
221 if (cd->info == c) {
222 *pcd = cd->next;
223 _TIFFfree(cd);
224 return;
225 }
226 TIFFErrorExt(0, "TIFFUnRegisterCODEC",
227 "Cannot remove compression scheme %s; not registered", c->name);
228}
229
230/************************************************************************/
231/* TIFFGetConfisuredCODECs() */
232/************************************************************************/
233
234/**
235 * Get list of configured codecs, both built-in and registered by user.
236 * Caller is responsible to free this structure.
237 *
238 * @return returns array of TIFFCodec records (the last record should be NULL)
239 * or NULL if function failed.
240 */
241
242TIFFCodec*
243TIFFGetConfiguredCODECs()
244{
245 int i = 1;
246 codec_t *cd;
247 const TIFFCodec *c;
248 TIFFCodec *codecs = NULL, *new_codecs;
249
250 for (cd = registeredCODECS; cd; cd = cd->next) {
251 new_codecs = (TIFFCodec *)
252 _TIFFrealloc(codecs, i * sizeof(TIFFCodec));
253 if (!new_codecs) {
254 _TIFFfree (codecs);
255 return NULL;
256 }
257 codecs = new_codecs;
258 _TIFFmemcpy(codecs + i - 1, cd, sizeof(TIFFCodec));
259 i++;
260 }
261 for (c = _TIFFBuiltinCODECS; c->name; c++) {
262 if (TIFFIsCODECConfigured(c->scheme)) {
263 new_codecs = (TIFFCodec *)
264 _TIFFrealloc(codecs, i * sizeof(TIFFCodec));
265 if (!new_codecs) {
266 _TIFFfree (codecs);
267 return NULL;
268 }
269 codecs = new_codecs;
270 _TIFFmemcpy(codecs + i - 1, (const tdata_t)c, sizeof(TIFFCodec));
271 i++;
272 }
273 }
274
275 new_codecs = (TIFFCodec *) _TIFFrealloc(codecs, i * sizeof(TIFFCodec));
276 if (!new_codecs) {
277 _TIFFfree (codecs);
278 return NULL;
279 }
280 codecs = new_codecs;
281 _TIFFmemset(codecs + i - 1, 0, sizeof(TIFFCodec));
282
283 return codecs;
284}
285
286/* vim: set ts=8 sts=8 sw=8 noet: */
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