1/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.14 2011-04-02 20:54:09 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 * "Null" Compression Algorithm Support.
31 */
32#include "tiffiop.h"
33
34static int
35DumpFixupTags(TIFF* tif)
36{
37	(void) tif;
38	return (1);
39}
40
41/*
42 * Encode a hunk of pixels.
43 */
44static int
45DumpModeEncode(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 (-1);
70	}
71	return (1);
72}
73
74/*
75 * Decode a hunk of pixels.
76 */
77static int
78DumpModeDecode(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 */
112static int
113DumpModeSeek(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 */
123int
124TIFFInitDumpMode(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