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