diff options
Diffstat (limited to 'libtiff/tif_write.c')
| -rw-r--r-- | libtiff/tif_write.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/libtiff/tif_write.c b/libtiff/tif_write.c index eaa1f814..8792123c 100644 --- a/libtiff/tif_write.c +++ b/libtiff/tif_write.c @@ -1,4 +1,4 @@ -/* $Id: tif_write.c,v 1.36 2011-02-18 20:53:04 fwarmerdam Exp $ */ +/* $Id: tif_write.c,v 1.37 2012-08-13 22:10:17 fwarmerdam Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -226,17 +226,28 @@ TIFFWriteEncodedStrip(TIFF* tif, uint32 strip, void* data, tmsize_t cc) return ((tmsize_t) -1); tif->tif_flags |= TIFF_CODERSETUP; } - - tif->tif_rawcc = 0; - tif->tif_rawcp = tif->tif_rawdata; if( td->td_stripbytecount[strip] > 0 ) { + /* Make sure that at the first attempt of rewriting the tile, we will have */ + /* more bytes available in the output buffer than the previous byte count, */ + /* so that TIFFAppendToStrip() will detect the overflow when it is called the first */ + /* time if the new compressed tile is bigger than the older one. (GDAL #4771) */ + if( tif->tif_rawdatasize <= td->td_stripbytecount[strip] ) + { + if( !(TIFFWriteBufferSetup(tif, NULL, + (tmsize_t)TIFFroundup_64((uint64)(td->td_stripbytecount[strip] + 1), 1024))) ) + return ((tmsize_t)(-1)); + } + /* Force TIFFAppendToStrip() to consider placing data at end of file. */ tif->tif_curoff = 0; } - + + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + tif->tif_flags &= ~TIFF_POSTENCODE; sample = (uint16)(strip / td->td_stripsperimage); if (!(*tif->tif_preencode)(tif, sample)) @@ -362,16 +373,27 @@ TIFFWriteEncodedTile(TIFF* tif, uint32 tile, void* data, tmsize_t cc) tif->tif_flags |= TIFF_BUF4WRITE; tif->tif_curtile = tile; - tif->tif_rawcc = 0; - tif->tif_rawcp = tif->tif_rawdata; - if( td->td_stripbytecount[tile] > 0 ) { + /* Make sure that at the first attempt of rewriting the tile, we will have */ + /* more bytes available in the output buffer than the previous byte count, */ + /* so that TIFFAppendToStrip() will detect the overflow when it is called the first */ + /* time if the new compressed tile is bigger than the older one. (GDAL #4771) */ + if( tif->tif_rawdatasize <= td->td_stripbytecount[tile] ) + { + if( !(TIFFWriteBufferSetup(tif, NULL, + (tmsize_t)TIFFroundup_64((uint64)(td->td_stripbytecount[tile] + 1), 1024))) ) + return ((tmsize_t)(-1)); + } + /* Force TIFFAppendToStrip() to consider placing data at end of file. */ tif->tif_curoff = 0; } - + + tif->tif_rawcc = 0; + tif->tif_rawcp = tif->tif_rawdata; + /* * Compute tiles per row & per column to compute * current row and column |