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authorJörg Frings-Fürst <debian@jff-webhosting.net>2015-08-23 12:17:05 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2015-08-23 12:17:05 +0200
commitc0b89ac5bfb90835ef01573267020e42d4fe070c (patch)
tree733c16852d964d84b7565af4bdaff0bcca901b88 /tiff/html/v3.6.0.html
parent094535c010320967639e8e86f974d878e80baa72 (diff)
Imported Upstream version 1.8.0upstream/1.8.0
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-<HTML>
-<HEAD>
-<TITLE>
-Changes in TIFF v3.6.0
-</TITLE>
-</HEAD>
-
-<BODY BGCOLOR=white>
-<FONT FACE="Helvetica, Arial, Sans">
-<FONT FACE="Helvetica, Arial, Sans">
-
-<BASEFONT SIZE=4>
-<B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B>
-<BASEFONT SIZE=3>
-
-<UL>
-<HR SIZE=4 WIDTH=65% ALIGN=left>
-<B>Current Version</B>: v3.6.0<BR>
-<B>Previous Version</B>: <A HREF=v3.5.7.html>v3.5.7</a><BR>
-<B>Master FTP Site</B>: <A HREF="ftp://ftp.remotesensing.org/pub/libtiff">
-ftp.remotesensing.org</a>, directory pub/libtiff</A><BR>
-<B>Master HTTP Site</B>: <A HREF="http://www.remotesensing.org/libtiff">
-http://www.remotesensing.org/libtiff</a>
-<HR SIZE=4 WIDTH=65% ALIGN=left>
-</UL>
-
-<P>
-This document describes the changes made to the software between the
-<I>previous</I> and <I>current</I> 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:
-<UL>
-<LI><A HREF="#hightlights">Major Changes</A>
-<LI><A HREF="#configure">Changes in the software configuration</A>
-<LI><A HREF="#libtiff">Changes in libtiff</A>
-<LI><A HREF="#tools">Changes in the tools</A>
-<LI><A HREF="#contrib">Changes in the contrib area</A>
-<LI><A HREF="#lzwkit">Changes in the LZW compression kit</A>
-</UL>
-<p>
-<P><HR WIDTH=65% ALIGN=left>
-
-<!--------------------------------------------------------------------------->
-
-<A NAME="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>
-
-<ul>
- <li> New utility <a href=./man/raw2tiff.1.html>raw2tiff</a>
-for converting raw rasters into TIFF files.
- <li> Lots of new <a href=./man/tiff2ps.1.html>tiff2ps</a> options.
- <li> Lots of new <a href=./man/fax2tiff.1.html>fax2tiff</a> options.
- <li> Lots of bug fixes for LZW, JPEG and OJPEG compression.
-</ul>
-
-<h3>Custom Tag Support</h3>
-
-The approach to extending libtiff with custom tags has changed radically.
-Previously, all internally supported TIFF tags had a place in the
-private TIFFDirectory structure within libtiff to hold the values (if read),
-and a "field number" (ie. FIELD_SUBFILETYPE) used to identify that tag.
-However, every time a new tag was added to the core, the size of the
-TIFFDirectory structure would changing, breaking any dynamically linked
-software that used the private data structures.<p>
-
-Also, any tag not recognised
-by libtiff would not be read and accessable to applications without some
-fairly complicated work on the applications part to pre-register the tags
-as exemplified by the support for "Geo"TIFF tags by libgeotiff layered on
-libtiff. <p>
-
-Amoung other things this approach required the extension code
-to access the private libtiff structures ... which made the higher level
-non-libtiff code be locked into a specific version of libtiff at compile time.
-This caused no end of bug reports!<p>
-
-The new approach is for libtiff to read all tags from TIFF files. Those that
-aren't recognised as "core tags" (those having an associated FIELD_ value,
-and place for storage in the TIFFDirectory structure) are now read into a
-dynamic list of extra tags (td_customValues in TIFFDirectory). When a new
-tag code is encountered for the first time in a given TIFF file, a new
-anonymous tag definition is created for the tag in the tag definition list.
-The type, and some other metadata is worked out from the instance encountered.
-These fields are known as "custom tags". <p>
-
-Custom tags can be set and fetched normally using TIFFSetField() and
-TIFFGetField(), and appear pretty much like normal tags to application code.
-However, they have no impact on internal libtiff processing (such as
-compression). Some utilities, such as tiffcp will now copy these custom
-tags to the new output files. <p>
-
-As well as the internal work with custom tags, new C API entry points
-were added so that extension libraries, such as libgeotiff, could
-define new tags more easily without accessing internal data structures.
-Because tag handling of extension tags is done via the "custom fields"
-mechanism as well, the definition provided externally mostly serves to provide
-a meaningful name for the tag.
-
-The addition of "custom tags" and the altered approach to extending libtiff
-with externally defined tags is the primary reason for the shift to the
-3.6.x version number from 3.5.x.<p>
-
-<P><HR WIDTH=65% ALIGN=left>
-<!--------------------------------------------------------------------------->
-
-<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>
-
-<UL>
-<li> configure, config.site: Fix for large files (>2GiB) support. New
-option in the config.site: LARGEFILE="yes". Should be enougth for the large
-files I/O.
-
-<li> configure: Set -DPIXARLOG_SUPPORT option along with -DZIP_SUPPORT.
-
-<li> html/Makefile.in: Updated to use groffhtml for generating html pages
-from man pages.
-
-<li> configure, libtiff/Makefile.in: Added SCO OpenServer 5.0.6 support
-from John H. DuBois III.
-
-<li> libtiff/{Makefile.vc, libtiff.def}: Missed declarations added.
-
-<li> libtiff/Makefile.in, tools/Makefile.in: Shared library will not be
-stripped when installing, utility binaries will do be stripped. As per bug 93.
-
-<li> man/Makefile.in: Patch DESTDIR handling as per bug 95.
-
-<li> configure: OpenBSD changes for Sparc64 and DSO version as per bug 96.
-
-<li> config.site/configure: added support for OJPEG=yes option to enable
-OJPEG support from config.site.
-
-<li> config.guess, config.sub: Updated from ftp.gnu.org/pub/config.
-
-<li> configure: Modify CheckForBigEndian so it can work in a cross
-compiled situation.
-
-<li> configure, libtiff/Makefile.in: Changes for building on MacOS 10.1
-as per bug 94.
-
-<li> html/Makefile.in: added missing images per bug 92.
-
-<li> port/Makefile.in: fixed clean target per bug 92.
-</UL>
-
-<P><HR WIDTH=65% ALIGN=left>
-
-<!--------------------------------------------------------------------------->
-
-<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>
-
-<UL>
-
-<li> libtiff/tif_getimage.c: New function <A
-HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
-implemented to retrieve raster array with user-specified origin position.
-
-<li> libtiff/tif_fax3.c: Fix wrong line numbering.
-
-<li> libtiff/tif_dirread.c: Check field counter against number of fields.
-
-<li> Store a list of opened IFD to prevent directory looping.
-
-<li> libtiff/tif_jpeg.c: modified segment_height calculation to always
-be a full height tile for tiled images. Also changed error to just
-be a warning.
-
-<li> libtiff/tif_lzw.c: fixed so that decoder state isn't allocated till
-LZWSetupDecode(). Needed to read LZW files in "r+" mode.
-
-<li> libtiff/tif_dir.c: fixed up the tif_postdecode settings responsible
-for byte swapping complex image data.
-
-<li> libtiff/tif_open.c: Removed error if opening a compressed file
-in update mode bug (198).
-
-<li> libtiff/tif_write.c: TIFFWriteCheck() now fails if the image is
-a pre-existing compressed image. That is, image writing to pre-existing
-compressed images is not allowed.
-
-<li> html/man/*.html: Web pages regenerated from man pages.
-
-<li> libtiff/tif_jpeg.c: Hack to ensure that "boolean" is defined properly
-on Windows so as to avoid the structure size mismatch error from libjpeg
-(bug 188).
-
-<li> libtiff/tiff.h: #ifdef USING_VISUALAGE around previous Visual Age
-AIX porting hack as it screwed up gcc. (bug 39)
-
-<li> libtiff/tiff.h: added COMPRESSION_JP2000 (34712) for LEAD tools
-custom compression.
-
-<li> libtiff/tif_dirread.c: Another fix for the fetching SBYTE arrays
-by the TIFFFetchByteArray() function. (bug 52)
-
-<li> libtiff/tif_dirread.c: Expand v[2] to v[4] in TIFFFetchShortPair()
-as per bug 196.
-
-<li> libtiff/tif_lzw.c: Additional consistency checking added in
-LZWDecode() and LZWDecodeCompat() fixing bugs 190 and 100.
-
-<li> libtiff/tif_lzw.c: Added check for valid code lengths in LZWDecode()
-and LZWDecodeCompat(). Fixes bug 115.
-
-<li> tif_getimage.c: Ensure that TIFFRGBAImageBegin() returns the
-return code from the underlying pick function as per bug 177.
-
-<li> libtiff/{tif_jpeg.c,tif_strip.c,tif_print.c}: Hacked tif_jpeg.c to
-fetch TIFFTAG_YCBCRSUBSAMPLING from the jpeg data stream if it isn't
-present in the tiff tags as per bug 168.
-
-<li> libtiff/tif_jpeg.c: Fixed problem with setting of nrows in
-JPEGDecode() as per bug 129.
-
-<li> libtiff/tif_read.c, libtiff/tif_write.c: TIFFReadScanline() and
-TIFFWriteScanline() now set tif_row explicitly in case the codec has
-fooled with the value as per bug 129.
-
-<li> libtiff/tif_ojpeg.c: Major upgrade from Scott. Details in bug 156.
-
-<li> libtiff/tif_open.c: Pointers to custom procedures
-in TIFFClientOpen() are checked to be not NULL-pointers.
-
-<li> libtiff/tif_lzw.c: Assertions in LZWDecode and LZWDecodeCompat
-replaced by warnings. Now libtiff should read corrupted LZW-compressed
-files by skipping bad strips as per bug 100.
-
-<li> libtiff/: tif_dirwrite.c, tif_write.c, tiffio.h:
-<a href=./man/TIFFWriteDirectory.3t.html>TIFFCheckpointDirectory()</a>
-routine added as per bug 124. The
-<a href=./man/TIFFWriteDirectory.3t.html>TIFFWriteDirectory</a>
-man page discusses this new function as well as the related
-<a href=./man/TIFFWriteDirectory.3t.html>TIFFRewriteDirectory()</a>.
-
-<li> libtiff/: tif_codec.c, tif_compress.c, tiffiop.h, tif_getimage.c:
-Introduced
-additional members tif->tif_decodestatus and tif->tif_encodestatus
-for correct handling of unconfigured codecs (we should not try to read
-data or to define data size without correct codecs). See bug 119.
-
-<li> tif_dirread.c: avoid div-by-zero if rowbytes is zero in chop func as
-per bug 111.
-
-<li> libtiff/: tiff.h, tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
-tif_dirwrite.c: Dwight Kelly added get/put code for new tag XMLPACKET as
-defined in Adobe XMP Technote. Added missing INKSET tag value from TIFF 6.0
-spec INKSET_MULTIINK (=2). Added missing tags from Adobe TIFF technotes:
-CLIPPATH, XCLIPPATHUNITS, YCLIPPATHUNITS, OPIIMAGEID, OPIPROXY and
-INDEXED. Added PHOTOMETRIC tag value from TIFF technote 4 ICCLAB (=9).
-
-<li> libtiff/tif_getimage.c: Additional check for supported codecs added in
-TIFFRGBAImageOK, TIFFReadRGBAImage, TIFFReadRGBAStrip and TIFFReadRGBATile now
-use TIFFRGBAImageOK before reading a per bug 110.
-
-<li> libtiff/: tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
-tif_dirwrite.c: Added routine
-<a href=./man/TIFFDataWidth.3t.html>TIFFDataWidth</a> for determining
-TIFFDataType sizes instead of working with tiffDataWidth array
-directly as per bug 109.
-
-<li>libtiff/: tif_dirinfo.c, tif_dirwrite.c: Added possibility to
-read broken TIFFs with LONG type used for TIFFTAG_COMPRESSION,
-TIFFTAG_BITSPERSAMPLE, TIFFTAG_PHOTOMETRIC as per bug 99.
-
-<li> libtiff/{tiff.h,tif_fax3.c}: Add support for __arch64__ as per bug 94.
-
-<li> libtiff/tif_read.c: Fixed TIFFReadEncodedStrip() to fail if the
-decodestrip function returns anything not greater than zero as per bug 97.
-
-<li> libtiff/tif_jpeg.c: fixed computation of segment_width for
-tiles files to avoid error about it not matching the
-cinfo.d.image_width values ("JPEGPreDecode: Improper JPEG strip/tile
-size.") for ITIFF files. Apparently the problem was incorporated since
-3.5.5, presumably during the OJPEG/JPEG work recently.
-
-<li> libtiff/tif_getimage.c: If DEFAULT_EXTRASAMPLE_AS_ALPHA is 1
-(defined in tiffconf.h - 1 by default) then the RGBA interface
-will assume that a fourth extra sample is ASSOCALPHA if the
-EXTRASAMPLE value isn't set for it. This changes the behaviour of
-the library, but makes it work better with RGBA files produced by
-lots of applications that don't mark the alpha values properly.
-As per bugs 93 and 65.
-
-<li> libtiff/tif_jpeg.c: allow jpeg data stream sampling values to
-override those from tiff directory. This makes this work with
-ImageGear generated files.
-
-</UL>
-
-<P><HR WIDTH=65% ALIGN=left>
-
-<!-------------------------------------------------------------------------->
-
-<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>
-
-<UL>
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added page size setting
-when creating PS Level 2.
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Fixed PS comment emitted when
-FlateDecode is being used.
-
-<li> <a href=./man/tiffsplit.1.html>tiffsplit</a>: increased the maximum
-number of pages that can be split.
-
-<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>: Added option `-p' to
-explicitly select color space of input image data.
-
-<li> <a href=./man/tiffmedian.1.html>tiffmedian</a>: Suppiort for large
-(> 2GB) images.
-
-<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: Fixed possible endless loop.
-
-<li> <a href=./man/tiff2rgba.1.html>tiff2rgba</a>: Switched to use
-<A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
-instead of <A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImage()</A>.
-
-<li> <a href=./man/tiffcmp.1.html>tiffcmp</a>: Fixed problem with unused data
-comparing (bug 349). `-z' option now can be used to set the number of reported
-different bytes.
-
-<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Added possibility to specify
-value -1 to -r option to get the entire image as one strip (bug 343).
-
-<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Set the correct RowsPerStrip
-and PageNumber values (bug 343).
-
-<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Page numbering fixed (bug
-341).
-
-<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: PPM header parser improved:
-now able to skip comments.
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Force deadzone printing when
-EPS output specified (bug 325).
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Add ability to generate
-PS Level 3. It basically allows one to use the /flateDecode filter for ZIP
-compressed TIFF images. Patch supplied by Tom Kacvinsky (bug 328).
-
-<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Fixed problem with colorspace
-conversion for JPEG encoded images (bugs 23 and 275)
-
-<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Applied patch from
-Julien Gaulmin. More switches for fax2tiff tool for better control
-of input and output (bugs 272 and 293).
-
-<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>:
-New utility for turning raw raster images into TIFF files
-written by Andrey Kiselev.
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>:
-Sebastian Eken provided patches (bug 200) to add new these new
-switches:
- <ul>
- <li> <b>-b #</b>: for a bottom margin of # inches
- <li> <b>-c</b>: center image
- <li> <b>-l #</b>: for a left margin of # inches
- <li> <b>-r</b>: rotate the image by 180 degrees
- </ul>
-
-Also, new features merged with code for shrinking/overlapping.
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Don't emit BeginData/EndData
-DSC comments since we are unable to properly include the amount to skip
-as per bug 80.
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added workaround for some
-software that may crash when last strip of image contains fewer number
-of scanlines than specified by the `/Height' variable as per bug 164.
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Patch from John Williams to add new
-functionality for tiff2ps utility splitting long images in several pages as
-per bug 142. New switches:
- <ul>
- <li> <b>-H #</b>: split image if height is more than # inches
- <li> <b>-L #</b>: overLap split images by # inches
- </ul>
-
-<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: New commandline
-switches to override resolution units obtained from the input file per bug 131:
- <ul>
- <li> <b>-x</b>: override resolution units as centimeters
- <li> <b>-y</b>: override resolution units as inches
- </ul>
-
-<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Updated to reflect
-latest changes in libtiff per bug 125.
-
-<li> tiff2ps: Division by zero fixed as per bug 88.
-
-<li> <a href=./man/tiffcp.1.html>tiffcp<a>:
-Added support for 'Orientation' tag.
-
-<li> <a href=./man/tiffdump.1.html>tiffdump</a>:
-include TIFFTAG_JPEGTABLES in tag list.
-
-<li> tiffset: fix bug in error reporting.
-
-</UL>
-
-<P><HR WIDTH=65% ALIGN=left>
-
-<!--------------------------------------------------------------------------->
-
-<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>
-<UL>
-
-<li> Fixed distribution to include contrib/addtiffo/tif_ovrcache.{c,h}.
-<li> libtiff/contrib/win95: renamed to contrib/win_dib. Added new
-Tiffile.cpp example of converting TIFF files into a DIB on Win32 as per
-bug 143.
-
-</UL>
-
-<!--------------------------------------------------------------------------->
-
-<A NAME="lzwkit"><B><FONT SIZE=+3>C</FONT>HANGES IN THE LZW COMPRESSION
-KIT:</B></A>
-<UL>
-
-<li> LZW compression kit synchronized with actual libtiff version.
-
-</UL>
-
-<A HREF="index.html"><IMG SRC="images/back.gif"></A> TIFF home page.<BR>
-
-<HR>
-
-Last updated $Date: 2003/10/04 11:38:17 $.
-
-</BODY>
-</HTML>