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compilation warning fix
[wxWidgets.git] / src / tiff / tif_dumpmode.c
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 /*
35 * Encode a hunk of pixels.
36 */
37 static int LINKAGEMODE
38 DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s)
39 {
40 (void) s;
41 while (cc > 0) {
42 tsize_t n;
43
44 n = cc;
45 if (tif->tif_rawcc + n > tif->tif_rawdatasize)
46 n = tif->tif_rawdatasize - tif->tif_rawcc;
47 /*
48 * Avoid copy if client has setup raw
49 * data buffer to avoid extra copy.
50 */
51 if (tif->tif_rawcp != pp)
52 _TIFFmemcpy(tif->tif_rawcp, pp, n);
53 tif->tif_rawcp += n;
54 tif->tif_rawcc += n;
55 pp += n;
56 cc -= n;
57 if (tif->tif_rawcc >= tif->tif_rawdatasize &&
58 !TIFFFlushData1(tif))
59 return (-1);
60 }
61 return (1);
62 }
63
64 /*
65 * Decode a hunk of pixels.
66 */
67 static int LINKAGEMODE
68 DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
69 {
70 (void) s;
71 if (tif->tif_rawcc < cc) {
72 TIFFError(tif->tif_name,
73 "DumpModeDecode: Not enough data for scanline %d",
74 tif->tif_row);
75 return (0);
76 }
77 /*
78 * Avoid copy if client has setup raw
79 * data buffer to avoid extra copy.
80 */
81 if (tif->tif_rawcp != buf)
82 _TIFFmemcpy(buf, tif->tif_rawcp, cc);
83 tif->tif_rawcp += cc;
84 tif->tif_rawcc -= cc;
85 return (1);
86 }
87
88 /*
89 * Seek forwards nrows in the current strip.
90 */
91 static int LINKAGEMODE
92 DumpModeSeek(TIFF* tif, uint32 nrows)
93 {
94 tif->tif_rawcp += nrows * tif->tif_scanlinesize;
95 tif->tif_rawcc -= nrows * tif->tif_scanlinesize;
96 return (1);
97 }
98
99 /*
100 * Initialize dump mode.
101 */
102 int
103 TIFFInitDumpMode(TIFF* tif, int scheme)
104 {
105 (void) scheme;
106 tif->tif_decoderow = DumpModeDecode;
107 tif->tif_decodestrip = DumpModeDecode;
108 tif->tif_decodetile = DumpModeDecode;
109 tif->tif_encoderow = DumpModeEncode;
110 tif->tif_encodestrip = DumpModeEncode;
111 tif->tif_encodetile = DumpModeEncode;
112 tif->tif_seek = DumpModeSeek;
113 return (1);
114 }