+
+
+TIFF CHANGE INFORMATION
+
+
+
+
+
+This document describes the changes made to the software between the
+previous and current versions (see above).
+If you don't find something listed here, then it was not done in this
+timeframe, or it was not considered important enough to be mentioned.
+The following information is located here:
+
+
+
+
+
+
+CHANGES IN THE SOFTWARE CONFIGURATION:
+
+
+- libtiff/libtiff.def: Brent Roman submitted new version adding
+serveral missing entry points. Also add a few other entry points
+later.
+
+
- configure, Makefile.in, etc: added support for OPTIMIZER being
+ set from config.site.
+
- config.guess: updated wholesale to an FSF version apparently
+ from 1998 (as opposed to 1994). This is mainly inspired by
+ providing for MacOS X support.
+
+
- configure/config.site: modified to check if -lm is needed for
+ MACHDEPLIBS if not supplied by config.site. Needed for Darwin.
+
- libtiff/tiff.h: Applied hac to try and resolve the problem
+ with the inttypes.h include file on AIX. (Bug 39)
+
+
- configure, *Makefile.in: Various changes to improve configuration
+ for HP/UX specifically, and also in general. (Bug 40) They include:
+
+ - Try to handle /usr/bin/sh instead of /bin/sh where necessary.
+
- Upgrade to HP/UX 10.x+ compiler, linker and dso options.
+
- Fixed mmap() test to avoid MMAP_FIXED ... it isn't available on HP
+
- Use -${MAKEFLAGS} in sub makes from makefiles.
+
- Fixed SCRIPT_SH/SHELL handling.
+
+ - configure: Changes for DSO generation on AIX provided by
+ John Marquart .
+
+
- configure, libtiff/Makefile.in: Modified to build DSOs properly
+ on Darwin thanks to Robert Krajewski (rpk@alum.mit.edu) and
+ Keisuke Fujii (fujiik@jlcuxf.kek.jp).
+
+
- configure, libtiff/Makefile.in: applied OpenBSD patches as per bug 61.
+
+
- Makefile.in: added DESTDIR support as per bug 60.
+
+
- libtiff/tif_jpeg.c: Define HAVE_BOOLEAN on windows if RPCNDR.H
+ has been included.
+
- man/Makefile.in: add TIFFClientOpen link as per debian submitted
+ bug 66.
+
- libtiff/Makefile.in: Fixed @DSOSUB_VERSION to be @DSOSUF_VERSION@
+ in two places.
+
+
+
+
+
+
+CHANGES IN LIBTIFF:
+
+
+
+- tif_fax3.c: keep rw_mode flag internal to fax3 state to remember
+ whether we are encoding or decoding. This is to ensure graceful
+ recovery if TIFFClientOpen() discovers an attempt to open a compressed
+ file for "r+" access, and subsequently close it, as it resets the
+ tif_mode flag to O_RDONLY in this case to avoid writes, confusing the
+ compressor's concept of whether it is in encode or decode mode.
+
- tif_luv.c/tiff.h/tiffio.h:
+ New version of TIFF LogLuv (SGILOG) modules contributed by Greg Ward
+ (greg@shutterfly.com). He writes:
+
+
+ - I improved the gamut-mapping function in tif_luv.c for imaginary
+ colors, because some images were being super-saturated on the input
+ side and this resulted in some strange color shifts in the output.
+
+
- I added a psuedotag in tiff.h to control random dithering during
+ LogLuv encoding. This is turned off by default for 32-bit LogLuv and
+ on for 24-bit LogLuv output. Dithering improves the average color
+ accuracy over the image.
+
+
- I added a #define for LOG_LUV_PUBLIC, which is enabled by default in
+ tiffio.h, to expose internal routines for converting between LogLuv and
+ XYZ coordinates. This is helpful for writing more efficient,
+ specialized conversion routines, especially for reading LogLuv files.
+
+
+ - libtiff/tif_dirinfo.c: don't declare tiffFieldInfo static on VMS.
+
+
- Added TIFFTAG_COPYRIGHT support.
+
- tif_getimage.c: Added support for 16bit minisblack/miniswhite
+ images in RGBA interface.
+
- libtiff/tif_dirinfo.c: removed duplicate TIFFTAG_PHOTOSHOP as per
+ bug 44.
+
- libtiff/tif_dirwrite.c: Added support for TIFF_VARIABLE2 in the
+ case of writing TIFF_BYTE/TIFF_SBYTE fields as per bug 43.
+
+
- libtiff/tif_dirinfo.c: Modified the TIFF_BYTE definition for
+ TIFFTAG_PHOTOSHOP to use a writecount of TIFF_VARIABLE2 (-3) to
+ force use of uint32 counts instead of short counts.
+
+
- libtiff/tif_dirinfo.c: moved pixar and copyright flags to
+ ensure everything is in order.
+
+
- Integrated experimental OJPEG support from Scott Marovich of HP.
+
+
- libtiff/tif_open.c: Seek back to zero after failed read,
+ before writing header.
+
+
- libtiff/tiff.h, libtiff/tif_fax3.c: added check for __LP64__
+ when checking for 64 bit architectures as per bugzilla bug 67.
+
- libtiff/tif_getimage.c: Use memmove() instead of TIFFmemcpy()
+ in TIFFReadRGBATile() to avoid issues in cases of overlapping
+ buffers. See Bug 69 in Bugzilla.
+
- libtiff/tif_getimage.c: Don't complain for CMYK (separated)
+ images with more than four samples per pixel as per bug 73.
+
+
- libtiff/tif_getimage.c: relax handling of contig case where
+there are extra samples that are supposed to be ignored as per bug 75. This
+should now work for 8bit greyscale or palletted images.
+
+
- libtiff/tif_packbits.c: fixed memory overrun error as per bug 77.
+
+
- libtiff/tif_getimage.c: Fixed problem with reading strips or
+tiles that don't start on a tile boundary. Fix contributed by
+Josep Vallverdu (from HP), and further described in bug 47.
+
+
- libtif/tif_fax3.c: Removed #ifdef PURIFY logic, and modified to
+ always use the "safe" version, even if there is a very slight
+ cost in performance as per bug 54.
+
- libtiff/tif_lzw.c: added dummy LZWSetupEncode() to report an
+ error about LZW not being available.
+
+
- libtiff/tif_dir.c: propagate failure to initialize compression
+ back from TIFFSetField() as an error status, so applications can
+ detect failure.
+
+
- libtiff/tif_lzw.c: Avoid MS VC++ 5.0 optimization bug as per bug 78.
+
+
- libtiff/tif_dirwrite.c: added TIFFRewriteDirectory() function.
+Updated TIFFWriteDirectory man page to include TIFFRewriteDirectory.
+
+
- libtiff/tiff.h: I have created COMPRESSION_CCITT_T4,
+ COMPRESSION_CCITT_T6, TIFFTAG_T4OPTIONS and TIFFTAG_T6OPTIONS aliases
+ in keeping with TIFF 6.0 standard in tiff.h as per bug 83.
+
+
- Added PHOTOMETRIC_ITULAB as per bug 90.
+
+
+
+
+
+
+
+CHANGES IN THE TOOLS:
+
+
+- Brent Roman contributed updated tiffcp utility (and tiffcp.1)
+ with support for extracting subimages with the ,n syntax, and also
+ adding the -b bias removal flag.
+
- tiff2ps.c/tiff2ps.1: Substantial changes to tiff2ps by
+ Bruce A. Mallett, including a faster encoder, fixes for level
+ 2 PostScript, and support for the imagemask operator.
+
- fax2ps.c: Helge (libtiff at oldach.net) submitted fix
+that corrects behaviour for non-Letter paper
+sizes. (Bug 35) It fixes two problems:
+
+ Without scaling (-S) the fax is now centered on the page size specified
+ with -H and/or -W. Before, fax2ps was using an obscure and practially
+ useless algorithm to allocate the image relative to Letter sized paper
+ which sometime sled to useless whitespace on the paper, while at the
+ same time cutting of the faxes printable area at the opposite border.
+
+
+ Second, scaling now preserves aspect ratio, which makes unusual faxes
+ (in particular short ones) print properly.
+
+ - thumbnail.c: changed default output compression
+ to packbits from LZW since LZW isn't generally available.
+
- tiff2rgba.c: added -n flag to avoid emitting alpha component. Also added
+a man page for tiff2rgba.
+
+
- tiffcmp.c: Fixed multi samples per pixel support for ContigCompare
+as per bug 53.
+Updated bug section of tiffcmp.1 to note tiled file issues.
+
+
- libtiff/tif_getimage.c: Fixed so that failure is properly
+ reported by gtTileContig, gtStripContig, gtTileSeparate and
+ gtStripSeparate as per bug 51.
+
+
+
+
+
+
+
+
+CHANGES IN THE LZW COMPRESSION KIT:
+
+ - Rewrote lzw patching process so that is required to enable full
+ LZW support is to drop the tif_lzw.c from the
+ libtiff-lzw-compression-kit over the one in the libtiff directory.
+
+
- Some changes were made to make recovery from failure to
+ initialize the LZW compressor more graceful.
+
+
- Note that as distributed libtiff support LZW decompression, but
+ not LZW compression.
+
+
+
+
+CHANGES IN THE CONTRIB AREA:
+
+- Fixed distribution to include contrib/addtiffo/tif_ovrcache.{c,h}.
+
+
+
TIFF home page.
+
+
+
+Last updated $Date: 2004/11/26 14:37:20 $.
+
+
+