init - 初始化项目
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Lee Nony
174
3rdparty/libtiff/tif_flush.c
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174
3rdparty/libtiff/tif_flush.c
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/*
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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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if( TIFFForceStrileArrayWriting(tif) )
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return 1;
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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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* This is an advanced writing function that must be used in a particular
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* sequence, and together with TIFFDeferStrileArrayWriting(),
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* to make its intended effect. Its aim is to force the writing of
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* the [Strip/Tile][Offsets/ByteCounts] arrays at the end of the file, when
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* they have not yet been rewritten.
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*
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* The typical sequence of calls is:
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* TIFFOpen()
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* [ TIFFCreateDirectory(tif) ]
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* Set fields with calls to TIFFSetField(tif, ...)
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* TIFFDeferStrileArrayWriting(tif)
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* TIFFWriteCheck(tif, ...)
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* TIFFWriteDirectory(tif)
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* ... potentially create other directories and come back to the above directory
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* TIFFForceStrileArrayWriting(tif)
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*
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* Returns 1 in case of success, 0 otherwise.
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*/
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int TIFFForceStrileArrayWriting(TIFF* tif)
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{
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static const char module[] = "TIFFForceStrileArrayWriting";
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const int isTiled = TIFFIsTiled(tif);
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if (tif->tif_mode == O_RDONLY)
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{
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
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"File opened in read-only mode");
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return 0;
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}
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if( tif->tif_diroff == 0 )
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{
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TIFFErrorExt(tif->tif_clientdata, module,
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"Directory has not yet been written");
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return 0;
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}
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if( (tif->tif_flags & TIFF_DIRTYDIRECT) != 0 )
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{
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TIFFErrorExt(tif->tif_clientdata, module,
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"Directory has changes other than the strile arrays. "
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"TIFFRewriteDirectory() should be called instead");
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return 0;
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}
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if( !(tif->tif_flags & TIFF_DIRTYSTRIP) )
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{
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if( !(tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&
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tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&
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tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&
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tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&
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tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&
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tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&
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tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&
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tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0) )
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{
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TIFFErrorExt(tif->tif_clientdata, module,
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"Function not called together with "
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"TIFFDeferStrileArrayWriting()");
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return 0;
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}
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if (tif->tif_dir.td_stripoffset_p == NULL && !TIFFSetupStrips(tif))
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return 0;
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}
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if( _TIFFRewriteField( tif,
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isTiled ? TIFFTAG_TILEOFFSETS :
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TIFFTAG_STRIPOFFSETS,
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TIFF_LONG8,
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tif->tif_dir.td_nstrips,
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tif->tif_dir.td_stripoffset_p )
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&& _TIFFRewriteField( tif,
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isTiled ? TIFFTAG_TILEBYTECOUNTS :
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TIFFTAG_STRIPBYTECOUNTS,
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TIFF_LONG8,
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tif->tif_dir.td_nstrips,
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tif->tif_dir.td_stripbytecount_p ) )
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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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return 0;
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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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