1 /* $Id: tif_jbig.c,v 1.15 2010-03-10 18:56:48 bfriesen 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 return 0;
98 }
99
100 pImage = jbg_dec_getimage(&decoder, 0);
101 _TIFFmemcpy(buffer, pImage, jbg_dec_getsize(&decoder));
102 jbg_dec_free(&decoder);
103 return 1;
104 }
105
JBIGSetupEncode(TIFF * tif)106 static int JBIGSetupEncode(TIFF* tif)
107 {
108 if (TIFFNumberOfStrips(tif) != 1)
109 {
110 TIFFErrorExt(tif->tif_clientdata, "JBIG", "Multistrip images not supported in encoder");
111 return 0;
112 }
113
114 return 1;
115 }
116
JBIGCopyEncodedData(TIFF * tif,unsigned char * pp,size_t cc,uint16 s)117 static int JBIGCopyEncodedData(TIFF* tif, unsigned char* pp, size_t cc, uint16 s)
118 {
119 (void) s;
120 while (cc > 0)
121 {
122 tmsize_t n = (tmsize_t)cc;
123
124 if (tif->tif_rawcc + n > tif->tif_rawdatasize)
125 {
126 n = tif->tif_rawdatasize - tif->tif_rawcc;
127 }
128
129 assert(n > 0);
130 _TIFFmemcpy(tif->tif_rawcp, pp, n);
131 tif->tif_rawcp += n;
132 tif->tif_rawcc += n;
133 pp += n;
134 cc -= (size_t)n;
135 if (tif->tif_rawcc >= tif->tif_rawdatasize &&
136 !TIFFFlushData1(tif))
137 {
138 return (-1);
139 }
140 }
141
142 return (1);
143 }
144
JBIGOutputBie(unsigned char * buffer,size_t len,void * userData)145 static void JBIGOutputBie(unsigned char* buffer, size_t len, void* userData)
146 {
147 TIFF* tif = (TIFF*)userData;
148
149 if (isFillOrder(tif, tif->tif_dir.td_fillorder))
150 {
151 TIFFReverseBits(buffer, (tmsize_t)len);
152 }
153
154 JBIGCopyEncodedData(tif, buffer, len, 0);
155 }
156
JBIGEncode(TIFF * tif,uint8 * buffer,tmsize_t size,uint16 s)157 static int JBIGEncode(TIFF* tif, uint8* buffer, tmsize_t size, uint16 s)
158 {
159 TIFFDirectory* dir = &tif->tif_dir;
160 struct jbg_enc_state encoder;
161
162 (void) size, (void) s;
163
164 jbg_enc_init(&encoder,
165 dir->td_imagewidth,
166 dir->td_imagelength,
167 1,
168 &buffer,
169 JBIGOutputBie,
170 tif);
171 /*
172 * jbg_enc_out does the "real" encoding. As data is encoded,
173 * JBIGOutputBie is called, which writes the data to the directory.
174 */
175 jbg_enc_out(&encoder);
176 jbg_enc_free(&encoder);
177
178 return 1;
179 }
180
TIFFInitJBIG(TIFF * tif,int scheme)181 int TIFFInitJBIG(TIFF* tif, int scheme)
182 {
183 assert(scheme == COMPRESSION_JBIG);
184
185 /*
186 * These flags are set so the JBIG Codec can control when to reverse
187 * bits and when not to and to allow the jbig decoder and bit reverser
188 * to write to memory when necessary.
189 */
190 tif->tif_flags |= TIFF_NOBITREV;
191 tif->tif_flags &= ~TIFF_MAPPED;
192
193 /* Setup the function pointers for encode, decode, and cleanup. */
194 tif->tif_setupdecode = JBIGSetupDecode;
195 tif->tif_decodestrip = JBIGDecode;
196
197 tif->tif_setupencode = JBIGSetupEncode;
198 tif->tif_encodestrip = JBIGEncode;
199
200 return 1;
201 }
202
203 #endif /* JBIG_SUPPORT */
204
205 /* vim: set ts=8 sts=8 sw=8 noet: */
206
207 /*
208 * Local Variables:
209 * mode: c
210 * c-basic-offset: 8
211 * fill-column: 78
212 * End:
213 */
214