1 /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.15 2015-12-12 18:04:26 erouault 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 
34 static int
35 DumpFixupTags(TIFF* tif)
36 {
37 	(void) tif;
38 	return (1);
39 }
40 
41 /*
42  * Encode a hunk of pixels.
43  */
44 static int
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
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
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
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