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Frank Warmerdam
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<HTML>
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<HEAD>
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<TITLE>
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Changes in TIFF v3.5.7
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</TITLE>
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</HEAD>
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<BODY BGCOLOR=white>
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<FONT FACE="Helvetica, Arial, Sans">
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<FONT FACE="Helvetica, Arial, Sans">
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<BASEFONT SIZE=4>
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<B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B>
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<BASEFONT SIZE=3>
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<UL>
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<HR SIZE=4 WIDTH=65% ALIGN=left>
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<B>Current Version</B>: v3.5.7<BR>
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<B>Previous Version</B>: <A HREF=v3.5.6-beta.html>v3.5.6 Beta</a><BR>
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<B>Master FTP Site</B>: <A HREF="ftp://ftp.remotesensing.org/pub/libtiff">ftp.remotesensing.org</a>, directory pub/libtiff</A><BR>
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<B>Master HTTP Site</B>: <A HREF="http://www.libtiff.org/">http://www.libtiff.org</a>
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<HR SIZE=4 WIDTH=65% ALIGN=left>
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</UL>
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<P>
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This document describes the changes made to the software between the
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<I>previous</I> and <I>current</I> versions (see above).
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If you don't find something listed here, then it was not done in this
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timeframe, or it was not considered important enough to be mentioned.
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The following information is located here:
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<UL>
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<LI><A HREF="#configure">Changes in the software configuration</A>
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<LI><A HREF="#libtiff">Changes in libtiff</A>
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<LI><A HREF="#tools">Changes in the tools</A>
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<LI><A HREF="#lzwkit">Changes in the LZW compression kit</A>
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</UL>
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<p>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>
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<UL>
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<li> libtiff/libtiff.def: Brent Roman submitted new version adding
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serveral missing entry points. Also add a few other entry points
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later.
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<li> configure, Makefile.in, etc: added support for OPTIMIZER being
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set from config.site.
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<li> config.guess: updated wholesale to an FSF version apparently
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from 1998 (as opposed to 1994). This is mainly inspired by
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providing for MacOS X support.
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<li> configure/config.site: modified to check if -lm is needed for
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MACHDEPLIBS if not supplied by config.site. Needed for Darwin.
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<li> libtiff/tiff.h: Applied hac to try and resolve the problem
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with the inttypes.h include file on AIX. (Bug 39)
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<li> configure, *Makefile.in: Various changes to improve configuration
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for HP/UX specifically, and also in general. (Bug 40) They include:
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<ul>
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<li> Try to handle /usr/bin/sh instead of /bin/sh where necessary.
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<li> Upgrade to HP/UX 10.x+ compiler, linker and dso options.
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<li> Fixed mmap() test to avoid MMAP_FIXED ... it isn't available on HP
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<li> Use -${MAKEFLAGS} in sub makes from makefiles.
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<li> Fixed SCRIPT_SH/SHELL handling.
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</ul>
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<li> configure: Changes for DSO generation on AIX provided by
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John Marquart <jomarqua@indiana.edu>.
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<li> configure, libtiff/Makefile.in: Modified to build DSOs properly
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on Darwin thanks to Robert Krajewski (rpk@alum.mit.edu) and
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Keisuke Fujii (fujiik@jlcuxf.kek.jp).
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<li> configure, libtiff/Makefile.in: applied OpenBSD patches as per bug 61.
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<li> Makefile.in: added DESTDIR support as per bug 60.
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<li> libtiff/tif_jpeg.c: Define HAVE_BOOLEAN on windows if RPCNDR.H
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has been included.
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<li> man/Makefile.in: add TIFFClientOpen link as per debian submitted
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bug 66.
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<li> libtiff/Makefile.in: Fixed @DSOSUB_VERSION to be @DSOSUF_VERSION@
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in two places.
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>
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<UL>
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<li> tif_fax3.c: keep rw_mode flag internal to fax3 state to remember
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whether we are encoding or decoding. This is to ensure graceful
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recovery if TIFFClientOpen() discovers an attempt to open a compressed
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file for "r+" access, and subsequently close it, as it resets the
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tif_mode flag to O_RDONLY in this case to avoid writes, confusing the
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compressor's concept of whether it is in encode or decode mode.
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<li> tif_luv.c/tiff.h/tiffio.h:
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New version of TIFF LogLuv (SGILOG) modules contributed by Greg Ward
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(greg@shutterfly.com). He writes:
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<ol>
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<li> I improved the gamut-mapping function in tif_luv.c for imaginary
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colors, because some images were being super-saturated on the input
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side and this resulted in some strange color shifts in the output.
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<li> I added a psuedotag in tiff.h to control random dithering during
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LogLuv encoding. This is turned off by default for 32-bit LogLuv and
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on for 24-bit LogLuv output. Dithering improves the average color
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accuracy over the image.
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<li> I added a #define for LOG_LUV_PUBLIC, which is enabled by default in
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tiffio.h, to expose internal routines for converting between LogLuv and
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XYZ coordinates. This is helpful for writing more efficient,
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specialized conversion routines, especially for reading LogLuv files.
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</ol>
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<li> libtiff/tif_dirinfo.c: don't declare tiffFieldInfo static on VMS.
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<li> Added TIFFTAG_COPYRIGHT support.
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<li> tif_getimage.c: Added support for 16bit minisblack/miniswhite
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images in RGBA interface.
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<li> libtiff/tif_dirinfo.c: removed duplicate TIFFTAG_PHOTOSHOP as per
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bug 44.
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<li> libtiff/tif_dirwrite.c: Added support for TIFF_VARIABLE2 in the
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case of writing TIFF_BYTE/TIFF_SBYTE fields as per bug 43.
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<li> libtiff/tif_dirinfo.c: Modified the TIFF_BYTE definition for
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TIFFTAG_PHOTOSHOP to use a writecount of TIFF_VARIABLE2 (-3) to
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force use of uint32 counts instead of short counts.
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<li> libtiff/tif_dirinfo.c: moved pixar and copyright flags to
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ensure everything is in order.
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<li> Integrated experimental OJPEG support from Scott Marovich of HP.
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<li> libtiff/tif_open.c: Seek back to zero after failed read,
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before writing header.
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<li> libtiff/tiff.h, libtiff/tif_fax3.c: added check for __LP64__
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when checking for 64 bit architectures as per bugzilla bug 67.
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<li> libtiff/tif_getimage.c: Use memmove() instead of TIFFmemcpy()
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in TIFFReadRGBATile() to avoid issues in cases of overlapping
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buffers. See Bug 69 in Bugzilla.
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<li> libtiff/tif_getimage.c: Don't complain for CMYK (separated)
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images with more than four samples per pixel as per bug 73.
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<li> libtiff/tif_getimage.c: relax handling of contig case where
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there are extra samples that are supposed to be ignored as per bug 75. This
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should now work for 8bit greyscale or palletted images.
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<li> libtiff/tif_packbits.c: fixed memory overrun error as per bug 77.
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<li> libtiff/tif_getimage.c: Fixed problem with reading strips or
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tiles that don't start on a tile boundary. Fix contributed by
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Josep Vallverdu (from HP), and further described in bug 47.
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<li> libtif/tif_fax3.c: Removed #ifdef PURIFY logic, and modified to
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always use the "safe" version, even if there is a very slight
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cost in performance as per bug 54.
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<li> libtiff/tif_lzw.c: added dummy LZWSetupEncode() to report an
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error about LZW not being available.
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<li> libtiff/tif_dir.c: propagate failure to initialize compression
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back from TIFFSetField() as an error status, so applications can
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detect failure.
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<li> libtiff/tif_lzw.c: Avoid MS VC++ 5.0 optimization bug as per bug 78.
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<li> libtiff/tif_dirwrite.c: added TIFFRewriteDirectory() function.
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Updated TIFFWriteDirectory man page to include TIFFRewriteDirectory.
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<li> libtiff/tiff.h: I have created COMPRESSION_CCITT_T4,
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COMPRESSION_CCITT_T6, TIFFTAG_T4OPTIONS and TIFFTAG_T6OPTIONS aliases
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in keeping with TIFF 6.0 standard in tiff.h as per bug 83.
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<li> Added PHOTOMETRIC_ITULAB as per bug 90.
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!-------------------------------------------------------------------------->
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<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>
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<UL>
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<li> Brent Roman contributed updated tiffcp utility (and tiffcp.1)
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with support for extracting subimages with the ,n syntax, and also
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adding the -b bias removal flag.
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<li> tiff2ps.c/tiff2ps.1: Substantial changes to tiff2ps by
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Bruce A. Mallett, including a faster encoder, fixes for level
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2 PostScript, and support for the imagemask operator.
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<li> fax2ps.c: Helge (libtiff at oldach.net) submitted fix
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that corrects behaviour for non-Letter paper
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sizes. (Bug 35) It fixes two problems:
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<br>
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Without scaling (-S) the fax is now centered on the page size specified
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with -H and/or -W. Before, fax2ps was using an obscure and practially
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useless algorithm to allocate the image relative to Letter sized paper
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which sometime sled to useless whitespace on the paper, while at the
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same time cutting of the faxes printable area at the opposite border.
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<br>
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Second, scaling now preserves aspect ratio, which makes unusual faxes
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(in particular short ones) print properly.
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<li> thumbnail.c: changed default output compression
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to packbits from LZW since LZW isn't generally available.
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<li> tiff2rgba.c: added -n flag to avoid emitting alpha component. Also added
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a man page for tiff2rgba.
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<li> tiffcmp.c: Fixed multi samples per pixel support for ContigCompare
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as per bug 53.
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Updated bug section of tiffcmp.1 to note tiled file issues.
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<li> libtiff/tif_getimage.c: Fixed so that failure is properly
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reported by gtTileContig, gtStripContig, gtTileSeparate and
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gtStripSeparate as per bug 51.
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="lzwkit"><B><FONT SIZE=+3>C</FONT>HANGES IN THE LZW COMPRESSION KIT:</B></A>
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<UL>
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<LI> Rewrote lzw patching process so that is required to enable full
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LZW support is to drop the tif_lzw.c from the
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libtiff-lzw-compression-kit over the one in the libtiff directory.
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<LI> Some changes were made to make recovery from failure to
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initialize the LZW compressor more graceful.
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<LI> Note that as distributed libtiff support LZW decompression, but
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not LZW compression.
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</UL>
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<!--------------------------------------------------------------------------->
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<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>
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<UL>
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<li> Fixed distribution to include contrib/addtiffo/tif_ovrcache.{c,h}.
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</UL>
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<A HREF="index.html"><IMG SRC="images/back.gif"></A> TIFF home page.<BR>
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<HR>
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Last updated $Date: 2001-11-23 15:49:55 $.
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</BODY>
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</HTML>
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