1 /* $Id: tif_flush.c,v 1.9 2010-03-31 06:40:10 fwarmerdam 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 #include "tiffiop.h"
31
32 int
TIFFFlush(TIFF * tif)33 TIFFFlush(TIFF* tif)
34 {
35 if( tif->tif_mode == O_RDONLY )
36 return 1;
37
38 if (!TIFFFlushData(tif))
39 return (0);
40
41 /* In update (r+) mode we try to detect the case where
42 only the strip/tile map has been altered, and we try to
43 rewrite only that portion of the directory without
44 making any other changes */
45
46 if( (tif->tif_flags & TIFF_DIRTYSTRIP)
47 && !(tif->tif_flags & TIFF_DIRTYDIRECT)
48 && tif->tif_mode == O_RDWR )
49 {
50 uint64 *offsets=NULL, *sizes=NULL;
51
52 if( TIFFIsTiled(tif) )
53 {
54 if( TIFFGetField( tif, TIFFTAG_TILEOFFSETS, &offsets )
55 && TIFFGetField( tif, TIFFTAG_TILEBYTECOUNTS, &sizes )
56 && _TIFFRewriteField( tif, TIFFTAG_TILEOFFSETS, TIFF_LONG8,
57 tif->tif_dir.td_nstrips, offsets )
58 && _TIFFRewriteField( tif, TIFFTAG_TILEBYTECOUNTS, TIFF_LONG8,
59 tif->tif_dir.td_nstrips, sizes ) )
60 {
61 tif->tif_flags &= ~TIFF_DIRTYSTRIP;
62 tif->tif_flags &= ~TIFF_BEENWRITING;
63 return 1;
64 }
65 }
66 else
67 {
68 if( TIFFGetField( tif, TIFFTAG_STRIPOFFSETS, &offsets )
69 && TIFFGetField( tif, TIFFTAG_STRIPBYTECOUNTS, &sizes )
70 && _TIFFRewriteField( tif, TIFFTAG_STRIPOFFSETS, TIFF_LONG8,
71 tif->tif_dir.td_nstrips, offsets )
72 && _TIFFRewriteField( tif, TIFFTAG_STRIPBYTECOUNTS, TIFF_LONG8,
73 tif->tif_dir.td_nstrips, sizes ) )
74 {
75 tif->tif_flags &= ~TIFF_DIRTYSTRIP;
76 tif->tif_flags &= ~TIFF_BEENWRITING;
77 return 1;
78 }
79 }
80 }
81
82 if ((tif->tif_flags & (TIFF_DIRTYDIRECT|TIFF_DIRTYSTRIP))
83 && !TIFFRewriteDirectory(tif))
84 return (0);
85
86 return (1);
87 }
88
89 /*
90 * Flush buffered data to the file.
91 *
92 * Frank Warmerdam'2000: I modified this to return 1 if TIFF_BEENWRITING
93 * is not set, so that TIFFFlush() will proceed to write out the directory.
94 * The documentation says returning 1 is an error indicator, but not having
95 * been writing isn't exactly a an error. Hopefully this doesn't cause
96 * problems for other people.
97 */
98 int
TIFFFlushData(TIFF * tif)99 TIFFFlushData(TIFF* tif)
100 {
101 if ((tif->tif_flags & TIFF_BEENWRITING) == 0)
102 return (1);
103 if (tif->tif_flags & TIFF_POSTENCODE) {
104 tif->tif_flags &= ~TIFF_POSTENCODE;
105 if (!(*tif->tif_postencode)(tif))
106 return (0);
107 }
108 return (TIFFFlushData1(tif));
109 }
110
111 /* vim: set ts=8 sts=8 sw=8 noet: */
112 /*
113 * Local Variables:
114 * mode: c
115 * c-basic-offset: 8
116 * fill-column: 78
117 * End:
118 */
119