diff options
Diffstat (limited to 'src/3rdparty/libtiff/libtiff/tif_flush.c')
| -rw-r--r-- | src/3rdparty/libtiff/libtiff/tif_flush.c | 71 |
1 files changed, 61 insertions, 10 deletions
diff --git a/src/3rdparty/libtiff/libtiff/tif_flush.c b/src/3rdparty/libtiff/libtiff/tif_flush.c index 5ff56e9a81..fd14e4cdae 100644 --- a/src/3rdparty/libtiff/libtiff/tif_flush.c +++ b/src/3rdparty/libtiff/libtiff/tif_flush.c @@ -1,4 +1,4 @@ -/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_flush.c,v 1.3 2000/09/15 20:52:42 warmerda Exp $ */ +/* $Id: tif_flush.c,v 1.9 2010-03-31 06:40:10 fwarmerdam Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -32,15 +32,58 @@ int TIFFFlush(TIFF* tif) { + if( tif->tif_mode == O_RDONLY ) + return 1; - if (tif->tif_mode != O_RDONLY) { - if (!TIFFFlushData(tif)) - return (0); - if ((tif->tif_flags & TIFF_DIRTYDIRECT) && - !TIFFWriteDirectory(tif)) - return (0); - } - 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); } /* @@ -56,7 +99,7 @@ int TIFFFlushData(TIFF* tif) { if ((tif->tif_flags & TIFF_BEENWRITING) == 0) - return (0); + return (1); if (tif->tif_flags & TIFF_POSTENCODE) { tif->tif_flags &= ~TIFF_POSTENCODE; if (!(*tif->tif_postencode)(tif)) @@ -65,3 +108,11 @@ TIFFFlushData(TIFF* tif) return (TIFFFlushData1(tif)); } +/* vim: set ts=8 sts=8 sw=8 noet: */ +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |