diff options
Diffstat (limited to 'libtiff/tif_read.c')
| -rw-r--r-- | libtiff/tif_read.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/libtiff/tif_read.c b/libtiff/tif_read.c index cc4f5d2f..4f85fa93 100644 --- a/libtiff/tif_read.c +++ b/libtiff/tif_read.c @@ -1,4 +1,4 @@ -/* $Id: tif_read.c,v 1.59 2017-05-13 15:34:06 erouault Exp $ */ +/* $Id: tif_read.c,v 1.60 2017-06-29 07:37:12 erouault Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -262,6 +262,7 @@ TIFFFillStripPartial( TIFF *tif, int strip, tmsize_t read_ahead, int restart ) tif->tif_rawdataoff = tif->tif_rawdataoff + tif->tif_rawdataloaded - unused_data ; tif->tif_rawdataloaded = unused_data + to_read; + tif->tif_rawcc = tif->tif_rawdataloaded; tif->tif_rawcp = tif->tif_rawdata; if (!isFillOrder(tif, td->td_fillorder) && @@ -275,10 +276,28 @@ TIFFFillStripPartial( TIFF *tif, int strip, tmsize_t read_ahead, int restart ) ** restart the decoder. */ if( restart ) - return TIFFStartStrip(tif, strip); + { + +#ifdef JPEG_SUPPORT + /* A bit messy since breaks the codec abstraction. Ultimately */ + /* there should be a function pointer for that, but it seems */ + /* only JPEG is affected. */ + /* For JPEG, if there are multiple scans (can generally be known */ + /* with the read_ahead used), we need to read the whole strip */ + if( tif->tif_dir.td_compression==COMPRESSION_JPEG && + (uint64)tif->tif_rawcc < td->td_stripbytecount[strip] ) + { + if( TIFFJPEGIsFullStripRequired(tif) ) + { + return TIFFFillStrip(tif, strip); + } + } +#endif + + return TIFFStartStrip(tif, strip); + } else { - tif->tif_rawcc = tif->tif_rawdataloaded; return 1; } } |