1 /*
2 * Copyright (c) 1988-1997 Sam Leffler
3 * Copyright (c) 1991-1997 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 /*
26 * TIFF Library.
27 *
28 * "Null" Compression Algorithm Support.
29 */
30 #include "tiffiop.h"
31
32 static int
DumpFixupTags(TIFF * tif)33 DumpFixupTags(TIFF* tif)
34 {
35 (void) tif;
36 return (1);
37 }
38
39 /*
40 * Encode a hunk of pixels.
41 */
42 static int
DumpModeEncode(TIFF * tif,uint8 * pp,tmsize_t cc,uint16 s)43 DumpModeEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)
44 {
45 (void) s;
46 while (cc > 0) {
47 tmsize_t n;
48
49 n = cc;
50 if (tif->tif_rawcc + n > tif->tif_rawdatasize)
51 n = tif->tif_rawdatasize - tif->tif_rawcc;
52
53 assert( n > 0 );
54
55 /*
56 * Avoid copy if client has setup raw
57 * data buffer to avoid extra copy.
58 */
59 if (tif->tif_rawcp != pp)
60 _TIFFmemcpy(tif->tif_rawcp, pp, n);
61 tif->tif_rawcp += n;
62 tif->tif_rawcc += n;
63 pp += n;
64 cc -= n;
65 if (tif->tif_rawcc >= tif->tif_rawdatasize &&
66 !TIFFFlushData1(tif))
67 return (0);
68 }
69 return (1);
70 }
71
72 /*
73 * Decode a hunk of pixels.
74 */
75 static int
DumpModeDecode(TIFF * tif,uint8 * buf,tmsize_t cc,uint16 s)76 DumpModeDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s)
77 {
78 static const char module[] = "DumpModeDecode";
79 (void) s;
80 if (tif->tif_rawcc < cc) {
81 #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
82 TIFFErrorExt(tif->tif_clientdata, module,
83 "Not enough data for scanline %lu, expected a request for at most %I64d bytes, got a request for %I64d bytes",
84 (unsigned long) tif->tif_row,
85 (signed __int64) tif->tif_rawcc,
86 (signed __int64) cc);
87 #else
88 TIFFErrorExt(tif->tif_clientdata, module,
89 "Not enough data for scanline %lu, expected a request for at most %lld bytes, got a request for %lld bytes",
90 (unsigned long) tif->tif_row,
91 (signed long long) tif->tif_rawcc,
92 (signed long long) cc);
93 #endif
94 return (0);
95 }
96 /*
97 * Avoid copy if client has setup raw
98 * data buffer to avoid extra copy.
99 */
100 if (tif->tif_rawcp != buf)
101 _TIFFmemcpy(buf, tif->tif_rawcp, cc);
102 tif->tif_rawcp += cc;
103 tif->tif_rawcc -= cc;
104 return (1);
105 }
106
107 /*
108 * Seek forwards nrows in the current strip.
109 */
110 static int
DumpModeSeek(TIFF * tif,uint32 nrows)111 DumpModeSeek(TIFF* tif, uint32 nrows)
112 {
113 tif->tif_rawcp += nrows * tif->tif_scanlinesize;
114 tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
115 return (1);
116 }
117
118 /*
119 * Initialize dump mode.
120 */
121 int
TIFFInitDumpMode(TIFF * tif,int scheme)122 TIFFInitDumpMode(TIFF* tif, int scheme)
123 {
124 (void) scheme;
125 tif->tif_fixuptags = DumpFixupTags;
126 tif->tif_decoderow = DumpModeDecode;
127 tif->tif_decodestrip = DumpModeDecode;
128 tif->tif_decodetile = DumpModeDecode;
129 tif->tif_encoderow = DumpModeEncode;
130 tif->tif_encodestrip = DumpModeEncode;
131 tif->tif_encodetile = DumpModeEncode;
132 tif->tif_seek = DumpModeSeek;
133 return (1);
134 }
135 /*
136 * Local Variables:
137 * mode: c
138 * c-basic-offset: 8
139 * fill-column: 78
140 * End:
141 */
142