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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 | |
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