1 /* $Id: tif_jbig.c,v 1.16 2017-06-26 15:20:00 erouault 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 * JBIG Compression Algorithm Support.
31 * Contributed by Lee Howard <faxguy@deanox.com>
32 *
33 */
34
35 #include "tiffiop.h"
36
37 #ifdef JBIG_SUPPORT
38 #include "jbig.h"
39
JBIGSetupDecode(TIFF * tif)40 static int JBIGSetupDecode(TIFF* tif)
41 {
42 if (TIFFNumberOfStrips(tif) != 1)
43 {
44 TIFFErrorExt(tif->tif_clientdata, "JBIG", "Multistrip images not supported in decoder");
45 return 0;
46 }
47
48 return 1;
49 }
50
JBIGDecode(TIFF * tif,uint8 * buffer,tmsize_t size,uint16 s)51 static int JBIGDecode(TIFF* tif, uint8* buffer, tmsize_t size, uint16 s)
52 {
53 struct jbg_dec_state decoder;
54 int decodeStatus = 0;
55 unsigned char* pImage = NULL;
56 (void) size, (void) s;
57
58 if (isFillOrder(tif, tif->tif_dir.td_fillorder))
59 {
60 TIFFReverseBits(tif->tif_rawdata, tif->tif_rawdatasize);
61 }
62
63 jbg_dec_init(&decoder);
64
65 #if defined(HAVE_JBG_NEWLEN)
66 jbg_newlen(tif->tif_rawdata, (size_t)tif->tif_rawdatasize);
67 /*
68 * I do not check the return status of jbg_newlen because even if this
69 * function fails it does not necessarily mean that decoding the image
70 * will fail. It is generally only needed for received fax images
71 * that do not contain the actual length of the image in the BIE
72 * header. I do not log when an error occurs because that will cause
73 * problems when converting JBIG encoded TIFF's to
74 * PostScript. As long as the actual image length is contained in the
75 * BIE header jbg_dec_in should succeed.
76 */
77 #endif /* HAVE_JBG_NEWLEN */
78
79 decodeStatus = jbg_dec_in(&decoder, (unsigned char*)tif->tif_rawdata,
80 (size_t)tif->tif_rawdatasize, NULL);
81 if (JBG_EOK != decodeStatus)
82 {
83 /*
84 * XXX: JBG_EN constant was defined in pre-2.0 releases of the
85 * JBIG-KIT. Since the 2.0 the error reporting functions were
86 * changed. We will handle both cases here.
87 */
88 TIFFErrorExt(tif->tif_clientdata,
89 "JBIG", "Error (%d) decoding: %s",
90 decodeStatus,
91 #if defined(JBG_EN)
92 jbg_strerror(decodeStatus, JBG_EN)
93 #else
94 jbg_strerror(decodeStatus)
95 #endif
96 );
97 jbg_dec_free(&decoder);
98 return 0;
99 }
100
101 pImage = jbg_dec_getimage(&decoder, 0);
102 _TIFFmemcpy(buffer, pImage, jbg_dec_getsize(&decoder));
103 jbg_dec_free(&decoder);
104 return 1;
105 }
106
JBIGSetupEncode(TIFF * tif)107 static int JBIGSetupEncode(TIFF* tif)
108 {
109 if (TIFFNumberOfStrips(tif) != 1)
110 {
111 TIFFErrorExt(tif->tif_clientdata, "JBIG", "Multistrip images not supported in encoder");
112 return 0;
113 }
114
115 return 1;
116 }
117
JBIGCopyEncodedData(TIFF * tif,unsigned char * pp,size_t cc,uint16 s)118 static int JBIGCopyEncodedData(TIFF* tif, unsigned char* pp, size_t cc, uint16 s)
119 {
120 (void) s;
121 while (cc > 0)
122 {
123 tmsize_t n = (tmsize_t)cc;
124
125 if (tif->tif_rawcc + n > tif->tif_rawdatasize)
126 {
127 n = tif->tif_rawdatasize - tif->tif_rawcc;
128 }
129
130 assert(n > 0);
131 _TIFFmemcpy(tif->tif_rawcp, pp, n);
132 tif->tif_rawcp += n;
133 tif->tif_rawcc += n;
134 pp += n;
135 cc -= (size_t)n;
136 if (tif->tif_rawcc >= tif->tif_rawdatasize &&
137 !TIFFFlushData1(tif))
138 {
139 return (-1);
140 }
141 }
142
143 return (1);
144 }
145
JBIGOutputBie(unsigned char * buffer,size_t len,void * userData)146 static void JBIGOutputBie(unsigned char* buffer, size_t len, void* userData)
147 {
148 TIFF* tif = (TIFF*)userData;
149
150 if (isFillOrder(tif, tif->tif_dir.td_fillorder))
151 {
152 TIFFReverseBits(buffer, (tmsize_t)len);
153 }
154
155 JBIGCopyEncodedData(tif, buffer, len, 0);
156 }
157
JBIGEncode(TIFF * tif,uint8 * buffer,tmsize_t size,uint16 s)158 static int JBIGEncode(TIFF* tif, uint8* buffer, tmsize_t size, uint16 s)
159 {
160 TIFFDirectory* dir = &tif->tif_dir;
161 struct jbg_enc_state encoder;
162
163 (void) size, (void) s;
164
165 jbg_enc_init(&encoder,
166 dir->td_imagewidth,
167 dir->td_imagelength,
168 1,
169 &buffer,
170 JBIGOutputBie,
171 tif);
172 /*
173 * jbg_enc_out does the "real" encoding. As data is encoded,
174 * JBIGOutputBie is called, which writes the data to the directory.
175 */
176 jbg_enc_out(&encoder);
177 jbg_enc_free(&encoder);
178
179 return 1;
180 }
181
TIFFInitJBIG(TIFF * tif,int scheme)182 int TIFFInitJBIG(TIFF* tif, int scheme)
183 {
184 assert(scheme == COMPRESSION_JBIG);
185
186 /*
187 * These flags are set so the JBIG Codec can control when to reverse
188 * bits and when not to and to allow the jbig decoder and bit reverser
189 * to write to memory when necessary.
190 */
191 tif->tif_flags |= TIFF_NOBITREV;
192 tif->tif_flags &= ~TIFF_MAPPED;
193
194 /* Setup the function pointers for encode, decode, and cleanup. */
195 tif->tif_setupdecode = JBIGSetupDecode;
196 tif->tif_decodestrip = JBIGDecode;
197
198 tif->tif_setupencode = JBIGSetupEncode;
199 tif->tif_encodestrip = JBIGEncode;
200
201 return 1;
202 }
203
204 #endif /* JBIG_SUPPORT */
205
206 /* vim: set ts=8 sts=8 sw=8 noet: */
207
208 /*
209 * Local Variables:
210 * mode: c
211 * c-basic-offset: 8
212 * fill-column: 78
213 * End:
214 */
215