1 /* $Header$ */
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 * "Null" Compression Algorithm Support.
31 */
32 #include "tiffiop.h"
33
34 static int
DumpFixupTags(TIFF * tif)35 DumpFixupTags(TIFF* tif)
36 {
37 (void) tif;
38 return (1);
39 }
40
41 /*
42 * Encode a hunk of pixels.
43 */
44 static int
DumpModeEncode(TIFF * tif,uint8 * pp,tmsize_t cc,uint16 s)45 DumpModeEncode(TIFF* tif, uint8* pp, tmsize_t cc, uint16 s)
46 {
47 (void) s;
48 while (cc > 0) {
49 tmsize_t n;
50
51 n = cc;
52 if (tif->tif_rawcc + n > tif->tif_rawdatasize)
53 n = tif->tif_rawdatasize - tif->tif_rawcc;
54
55 assert( n > 0 );
56
57 /*
58 * Avoid copy if client has setup raw
59 * data buffer to avoid extra copy.
60 */
61 if (tif->tif_rawcp != pp)
62 _TIFFmemcpy(tif->tif_rawcp, pp, n);
63 tif->tif_rawcp += n;
64 tif->tif_rawcc += n;
65 pp += n;
66 cc -= n;
67 if (tif->tif_rawcc >= tif->tif_rawdatasize &&
68 !TIFFFlushData1(tif))
69 return (0);
70 }
71 return (1);
72 }
73
74 /*
75 * Decode a hunk of pixels.
76 */
77 static int
DumpModeDecode(TIFF * tif,uint8 * buf,tmsize_t cc,uint16 s)78 DumpModeDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s)
79 {
80 static const char module[] = "DumpModeDecode";
81 (void) s;
82 if (tif->tif_rawcc < cc) {
83 #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
84 TIFFErrorExt(tif->tif_clientdata, module,
85 "Not enough data for scanline %lu, expected a request for at most %I64d bytes, got a request for %I64d bytes",
86 (unsigned long) tif->tif_row,
87 (signed __int64) tif->tif_rawcc,
88 (signed __int64) cc);
89 #else
90 TIFFErrorExt(tif->tif_clientdata, module,
91 "Not enough data for scanline %lu, expected a request for at most %lld bytes, got a request for %lld bytes",
92 (unsigned long) tif->tif_row,
93 (signed long long) tif->tif_rawcc,
94 (signed long long) cc);
95 #endif
96 return (0);
97 }
98 /*
99 * Avoid copy if client has setup raw
100 * data buffer to avoid extra copy.
101 */
102 if (tif->tif_rawcp != buf)
103 _TIFFmemcpy(buf, tif->tif_rawcp, cc);
104 tif->tif_rawcp += cc;
105 tif->tif_rawcc -= cc;
106 return (1);
107 }
108
109 /*
110 * Seek forwards nrows in the current strip.
111 */
112 static int
DumpModeSeek(TIFF * tif,uint32 nrows)113 DumpModeSeek(TIFF* tif, uint32 nrows)
114 {
115 tif->tif_rawcp += nrows * tif->tif_scanlinesize;
116 tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
117 return (1);
118 }
119
120 /*
121 * Initialize dump mode.
122 */
123 int
TIFFInitDumpMode(TIFF * tif,int scheme)124 TIFFInitDumpMode(TIFF* tif, int scheme)
125 {
126 (void) scheme;
127 tif->tif_fixuptags = DumpFixupTags;
128 tif->tif_decoderow = DumpModeDecode;
129 tif->tif_decodestrip = DumpModeDecode;
130 tif->tif_decodetile = DumpModeDecode;
131 tif->tif_encoderow = DumpModeEncode;
132 tif->tif_encodestrip = DumpModeEncode;
133 tif->tif_encodetile = DumpModeEncode;
134 tif->tif_seek = DumpModeSeek;
135 return (1);
136 }
137 /*
138 * Local Variables:
139 * mode: c
140 * c-basic-offset: 8
141 * fill-column: 78
142 * End:
143 */
144