diff options
Diffstat (limited to 'third_party/libtiff/tif_flush.c')
-rw-r--r-- | third_party/libtiff/tif_flush.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/third_party/libtiff/tif_flush.c b/third_party/libtiff/tif_flush.c new file mode 100644 index 0000000000..fd14e4cdae --- /dev/null +++ b/third_party/libtiff/tif_flush.c @@ -0,0 +1,118 @@ +/* $Id: tif_flush.c,v 1.9 2010-03-31 06:40:10 fwarmerdam Exp $ */ + +/* + * Copyright (c) 1988-1997 Sam Leffler + * Copyright (c) 1991-1997 Silicon Graphics, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that (i) the above copyright notices and this permission notice appear in + * all copies of the software and related documentation, and (ii) the names of + * Sam Leffler and Silicon Graphics may not be used in any advertising or + * publicity relating to the software without the specific, prior written + * permission of Sam Leffler and Silicon Graphics. + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR + * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, + * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF + * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +/* + * TIFF Library. + */ +#include "tiffiop.h" + +int +TIFFFlush(TIFF* tif) +{ + if( tif->tif_mode == O_RDONLY ) + return 1; + + if (!TIFFFlushData(tif)) + return (0); + + /* In update (r+) mode we try to detect the case where + only the strip/tile map has been altered, and we try to + rewrite only that portion of the directory without + making any other changes */ + + if( (tif->tif_flags & TIFF_DIRTYSTRIP) + && !(tif->tif_flags & TIFF_DIRTYDIRECT) + && tif->tif_mode == O_RDWR ) + { + uint64 *offsets=NULL, *sizes=NULL; + + if( TIFFIsTiled(tif) ) + { + if( TIFFGetField( tif, TIFFTAG_TILEOFFSETS, &offsets ) + && TIFFGetField( tif, TIFFTAG_TILEBYTECOUNTS, &sizes ) + && _TIFFRewriteField( tif, TIFFTAG_TILEOFFSETS, TIFF_LONG8, + tif->tif_dir.td_nstrips, offsets ) + && _TIFFRewriteField( tif, TIFFTAG_TILEBYTECOUNTS, TIFF_LONG8, + tif->tif_dir.td_nstrips, sizes ) ) + { + tif->tif_flags &= ~TIFF_DIRTYSTRIP; + tif->tif_flags &= ~TIFF_BEENWRITING; + return 1; + } + } + else + { + if( TIFFGetField( tif, TIFFTAG_STRIPOFFSETS, &offsets ) + && TIFFGetField( tif, TIFFTAG_STRIPBYTECOUNTS, &sizes ) + && _TIFFRewriteField( tif, TIFFTAG_STRIPOFFSETS, TIFF_LONG8, + tif->tif_dir.td_nstrips, offsets ) + && _TIFFRewriteField( tif, TIFFTAG_STRIPBYTECOUNTS, TIFF_LONG8, + tif->tif_dir.td_nstrips, sizes ) ) + { + tif->tif_flags &= ~TIFF_DIRTYSTRIP; + tif->tif_flags &= ~TIFF_BEENWRITING; + return 1; + } + } + } + + if ((tif->tif_flags & (TIFF_DIRTYDIRECT|TIFF_DIRTYSTRIP)) + && !TIFFRewriteDirectory(tif)) + return (0); + + return (1); +} + +/* + * Flush buffered data to the file. + * + * Frank Warmerdam'2000: I modified this to return 1 if TIFF_BEENWRITING + * is not set, so that TIFFFlush() will proceed to write out the directory. + * The documentation says returning 1 is an error indicator, but not having + * been writing isn't exactly a an error. Hopefully this doesn't cause + * problems for other people. + */ +int +TIFFFlushData(TIFF* tif) +{ + if ((tif->tif_flags & TIFF_BEENWRITING) == 0) + return (1); + if (tif->tif_flags & TIFF_POSTENCODE) { + tif->tif_flags &= ~TIFF_POSTENCODE; + if (!(*tif->tif_postencode)(tif)) + return (0); + } + return (TIFFFlushData1(tif)); +} + +/* vim: set ts=8 sts=8 sw=8 noet: */ +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |