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