blob: fd14e4cdae11b1889c61e5a21136f43b636a55fa
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 |
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 |
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 |