path: root/tif_dumpmode.c (plain)
blob: a94cf0b34a92c41378bc5916e7d3fc84813f1ea9

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
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 (-1);
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