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<HTML>
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<TITLE>
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Changes in TIFF v3.6.0
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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>: v3.6.0<BR>
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<B>Previous Version</B>: <A HREF=v3.5.7.html>v3.5.7</a><BR>
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<B>Master FTP Site</B>: <A HREF="ftp://ftp.remotesensing.org/pub/libtiff">
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ftp.remotesensing.org</a>, directory pub/libtiff</A><BR>
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<B>Master HTTP Site</B>: <A HREF="http://www.remotesensing.org/libtiff">
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http://www.remotesensing.org/libtiff</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="#hightlights">Major Changes</A>
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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="#contrib">Changes in the contrib area</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="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>
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<ul>
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<li> New utility <a href=./man/raw2tiff.1.html>raw2tiff</a>
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for converting raw rasters into TIFF files.
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<li> Lots of new <a href=./man/tiff2ps.1.html>tiff2ps</a> options.
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<li> Lots of new <a href=./man/fax2tiff.1.html>fax2tiff</a> options.
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<li> Lots of bug fixes for LZW, JPEG and OJPEG compression.
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</ul>
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<h3>Custom Tag Support</h3>
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The approach to extending libtiff with custom tags has changed radically.
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Previously, all internally supported TIFF tags had a place in the
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private TIFFDirectory structure within libtiff to hold the values (if read),
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and a "field number" (ie. FIELD_SUBFILETYPE) used to identify that tag.
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However, every time a new tag was added to the core, the size of the
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TIFFDirectory structure would changing, breaking any dynamically linked
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software that used the private data structures.<p>
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Also, any tag not recognised
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by libtiff would not be read and accessable to applications without some
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fairly complicated work on the applications part to pre-register the tags
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as exemplified by the support for "Geo"TIFF tags by libgeotiff layered on
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libtiff. <p>
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Amoung other things this approach required the extension code
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to access the private libtiff structures ... which made the higher level
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non-libtiff code be locked into a specific version of libtiff at compile time.
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This caused no end of bug reports!<p>
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The new approach is for libtiff to read all tags from TIFF files. Those that
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aren't recognised as "core tags" (those having an associated FIELD_ value,
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and place for storage in the TIFFDirectory structure) are now read into a
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dynamic list of extra tags (td_customValues in TIFFDirectory). When a new
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tag code is encountered for the first time in a given TIFF file, a new
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anonymous tag definition is created for the tag in the tag definition list.
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The type, and some other metadata is worked out from the instance encountered.
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These fields are known as "custom tags". <p>
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Custom tags can be set and fetched normally using TIFFSetField() and
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TIFFGetField(), and appear pretty much like normal tags to application code.
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However, they have no impact on internal libtiff processing (such as
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compression). Some utilities, such as tiffcp will now copy these custom
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tags to the new output files. <p>
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As well as the internal work with custom tags, new C API entry points
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were added so that extension libraries, such as libgeotiff, could
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define new tags more easily without accessing internal data structures.
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Because tag handling of extension tags is done via the "custom fields"
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mechanism as well, the definition provided externally mostly serves to provide
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a meaningful name for the tag.
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The addition of "custom tags" and the altered approach to extending libtiff
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with externally defined tags is the primary reason for the shift to the
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3.6.x version number from 3.5.x.<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> configure, config.site: Fix for large files (>2GiB) support. New
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option in the config.site: LARGEFILE="yes". Should be enougth for the large
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files I/O.
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<li> configure: Set -DPIXARLOG_SUPPORT option along with -DZIP_SUPPORT.
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<li> html/Makefile.in: Updated to use groffhtml for generating html pages
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from man pages.
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<li> configure, libtiff/Makefile.in: Added SCO OpenServer 5.0.6 support
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from John H. DuBois III.
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<li> libtiff/{Makefile.vc, libtiff.def}: Missed declarations added.
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<li> libtiff/Makefile.in, tools/Makefile.in: Shared library will not be
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stripped when installing, utility binaries will do be stripped. As per bug 93.
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<li> man/Makefile.in: Patch DESTDIR handling as per bug 95.
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<li> configure: OpenBSD changes for Sparc64 and DSO version as per bug 96.
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<li> config.site/configure: added support for OJPEG=yes option to enable
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OJPEG support from config.site.
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<li> config.guess, config.sub: Updated from ftp.gnu.org/pub/config.
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<li> configure: Modify CheckForBigEndian so it can work in a cross
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compiled situation.
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<li> configure, libtiff/Makefile.in: Changes for building on MacOS 10.1
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as per bug 94.
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<li> html/Makefile.in: added missing images per bug 92.
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<li> port/Makefile.in: fixed clean target per bug 92.
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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> libtiff/tif_getimage.c: New function <A
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HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
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implemented to retrieve raster array with user-specified origin position.
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<li> libtiff/tif_fax3.c: Fix wrong line numbering.
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<li> libtiff/tif_dirread.c: Check field counter against number of fields.
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<li> Store a list of opened IFD to prevent directory looping.
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<li> libtiff/tif_jpeg.c: modified segment_height calculation to always
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be a full height tile for tiled images. Also changed error to just
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be a warning.
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<li> libtiff/tif_lzw.c: fixed so that decoder state isn't allocated till
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LZWSetupDecode(). Needed to read LZW files in "r+" mode.
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<li> libtiff/tif_dir.c: fixed up the tif_postdecode settings responsible
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for byte swapping complex image data.
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<li> libtiff/tif_open.c: Removed error if opening a compressed file
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in update mode bug (198).
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<li> libtiff/tif_write.c: TIFFWriteCheck() now fails if the image is
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a pre-existing compressed image. That is, image writing to pre-existing
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compressed images is not allowed.
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<li> html/man/*.html: Web pages regenerated from man pages.
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<li> libtiff/tif_jpeg.c: Hack to ensure that "boolean" is defined properly
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on Windows so as to avoid the structure size mismatch error from libjpeg
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(bug 188).
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<li> libtiff/tiff.h: #ifdef USING_VISUALAGE around previous Visual Age
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AIX porting hack as it screwed up gcc. (bug 39)
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<li> libtiff/tiff.h: added COMPRESSION_JP2000 (34712) for LEAD tools
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custom compression.
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<li> libtiff/tif_dirread.c: Another fix for the fetching SBYTE arrays
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by the TIFFFetchByteArray() function. (bug 52)
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<li> libtiff/tif_dirread.c: Expand v[2] to v[4] in TIFFFetchShortPair()
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as per bug 196.
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<li> libtiff/tif_lzw.c: Additional consistency checking added in
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LZWDecode() and LZWDecodeCompat() fixing bugs 190 and 100.
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<li> libtiff/tif_lzw.c: Added check for valid code lengths in LZWDecode()
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and LZWDecodeCompat(). Fixes bug 115.
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<li> tif_getimage.c: Ensure that TIFFRGBAImageBegin() returns the
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return code from the underlying pick function as per bug 177.
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<li> libtiff/{tif_jpeg.c,tif_strip.c,tif_print.c}: Hacked tif_jpeg.c to
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fetch TIFFTAG_YCBCRSUBSAMPLING from the jpeg data stream if it isn't
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present in the tiff tags as per bug 168.
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<li> libtiff/tif_jpeg.c: Fixed problem with setting of nrows in
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JPEGDecode() as per bug 129.
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<li> libtiff/tif_read.c, libtiff/tif_write.c: TIFFReadScanline() and
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TIFFWriteScanline() now set tif_row explicitly in case the codec has
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fooled with the value as per bug 129.
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<li> libtiff/tif_ojpeg.c: Major upgrade from Scott. Details in bug 156.
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<li> libtiff/tif_open.c: Pointers to custom procedures
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in TIFFClientOpen() are checked to be not NULL-pointers.
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<li> libtiff/tif_lzw.c: Assertions in LZWDecode and LZWDecodeCompat
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replaced by warnings. Now libtiff should read corrupted LZW-compressed
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files by skipping bad strips as per bug 100.
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<li> libtiff/: tif_dirwrite.c, tif_write.c, tiffio.h:
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<a href=./man/TIFFWriteDirectory.3t.html>TIFFCheckpointDirectory()</a>
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routine added as per bug 124. The
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<a href=./man/TIFFWriteDirectory.3t.html>TIFFWriteDirectory</a>
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man page discusses this new function as well as the related
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<a href=./man/TIFFWriteDirectory.3t.html>TIFFRewriteDirectory()</a>.
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<li> libtiff/: tif_codec.c, tif_compress.c, tiffiop.h, tif_getimage.c:
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Introduced
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additional members tif->tif_decodestatus and tif->tif_encodestatus
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for correct handling of unconfigured codecs (we should not try to read
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data or to define data size without correct codecs). See bug 119.
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<li> tif_dirread.c: avoid div-by-zero if rowbytes is zero in chop func as
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per bug 111.
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<li> libtiff/: tiff.h, tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
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tif_dirwrite.c: Dwight Kelly added get/put code for new tag XMLPACKET as
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defined in Adobe XMP Technote. Added missing INKSET tag value from TIFF 6.0
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spec INKSET_MULTIINK (=2). Added missing tags from Adobe TIFF technotes:
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CLIPPATH, XCLIPPATHUNITS, YCLIPPATHUNITS, OPIIMAGEID, OPIPROXY and
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INDEXED. Added PHOTOMETRIC tag value from TIFF technote 4 ICCLAB (=9).
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<li> libtiff/tif_getimage.c: Additional check for supported codecs added in
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TIFFRGBAImageOK, TIFFReadRGBAImage, TIFFReadRGBAStrip and TIFFReadRGBATile now
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use TIFFRGBAImageOK before reading a per bug 110.
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<li> libtiff/: tif_dir.c, tif_dir.h, tif_dirinfo.c, tif_dirread.c,
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tif_dirwrite.c: Added routine
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<a href=./man/TIFFDataWidth.3t.html>TIFFDataWidth</a> for determining
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TIFFDataType sizes instead of working with tiffDataWidth array
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directly as per bug 109.
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<li>libtiff/: tif_dirinfo.c, tif_dirwrite.c: Added possibility to
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read broken TIFFs with LONG type used for TIFFTAG_COMPRESSION,
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TIFFTAG_BITSPERSAMPLE, TIFFTAG_PHOTOMETRIC as per bug 99.
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<li> libtiff/{tiff.h,tif_fax3.c}: Add support for __arch64__ as per bug 94.
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<li> libtiff/tif_read.c: Fixed TIFFReadEncodedStrip() to fail if the
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decodestrip function returns anything not greater than zero as per bug 97.
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<li> libtiff/tif_jpeg.c: fixed computation of segment_width for
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tiles files to avoid error about it not matching the
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cinfo.d.image_width values ("JPEGPreDecode: Improper JPEG strip/tile
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size.") for ITIFF files. Apparently the problem was incorporated since
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3.5.5, presumably during the OJPEG/JPEG work recently.
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<li> libtiff/tif_getimage.c: If DEFAULT_EXTRASAMPLE_AS_ALPHA is 1
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(defined in tiffconf.h - 1 by default) then the RGBA interface
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will assume that a fourth extra sample is ASSOCALPHA if the
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EXTRASAMPLE value isn't set for it. This changes the behaviour of
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the library, but makes it work better with RGBA files produced by
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lots of applications that don't mark the alpha values properly.
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As per bugs 93 and 65.
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<li> libtiff/tif_jpeg.c: allow jpeg data stream sampling values to
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override those from tiff directory. This makes this work with
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ImageGear generated files.
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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> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added page size setting
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when creating PS Level 2.
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<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Fixed PS comment emitted when
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FlateDecode is being used.
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<li> <a href=./man/tiffsplit.1.html>tiffsplit</a>: increased the maximum
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number of pages that can be split.
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<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>: Added option `-p' to
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explicitly select color space of input image data.
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309 |
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|
310 |
<li> <a href=./man/tiffmedian.1.html>tiffmedian</a>: Suppiort for large
|
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|
311 |
(> 2GB) images.
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|
312 |
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313 |
<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: Fixed possible endless loop.
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314 |
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|
315 |
<li> <a href=./man/tiff2rgba.1.html>tiff2rgba</a>: Switched to use
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|
316 |
<A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImageOriented()</A>
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|
317 |
instead of <A HREF="./man/TIFFReadRGBAImage.3t.html">TIFFReadRGBAImage()</A>.
|
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318 |
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|
319 |
<li> <a href=./man/tiffcmp.1.html>tiffcmp</a>: Fixed problem with unused data
|
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|
320 |
comparing (bug 349). `-z' option now can be used to set the number of reported
|
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|
321 |
different bytes.
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322 |
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|
323 |
<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Added possibility to specify
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|
324 |
value -1 to -r option to get the entire image as one strip (bug 343).
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325 |
|
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|
326 |
<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Set the correct RowsPerStrip
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|
327 |
and PageNumber values (bug 343).
|
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|
328 |
|
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|
329 |
<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Page numbering fixed (bug
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|
330 |
341).
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|
331 |
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|
332 |
<li> <a href=./man/ppm2tiff.1.html>ppm2tiff</a>: PPM header parser improved:
|
|
|
333 |
now able to skip comments.
|
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|
334 |
|
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|
335 |
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Force deadzone printing when
|
|
|
336 |
EPS output specified (bug 325).
|
|
|
337 |
|
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|
338 |
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Add ability to generate
|
|
|
339 |
PS Level 3. It basically allows one to use the /flateDecode filter for ZIP
|
|
|
340 |
compressed TIFF images. Patch supplied by Tom Kacvinsky (bug 328).
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|
341 |
|
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|
342 |
<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Fixed problem with colorspace
|
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|
343 |
conversion for JPEG encoded images (bugs 23 and 275)
|
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|
344 |
|
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|
345 |
<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Applied patch from
|
|
|
346 |
Julien Gaulmin. More switches for fax2tiff tool for better control
|
|
|
347 |
of input and output (bugs 272 and 293).
|
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|
348 |
|
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|
349 |
<li> <a href=./man/raw2tiff.1.html>raw2tiff</a>:
|
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|
350 |
New utility for turning raw raster images into TIFF files
|
|
|
351 |
written by Andrey Kiselev.
|
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|
352 |
|
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|
353 |
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>:
|
|
|
354 |
Sebastian Eken provided patches (bug 200) to add new these new
|
|
|
355 |
switches:
|
|
|
356 |
<ul>
|
|
|
357 |
<li> <b>-b #</b>: for a bottom margin of # inches
|
|
|
358 |
<li> <b>-c</b>: center image
|
|
|
359 |
<li> <b>-l #</b>: for a left margin of # inches
|
|
|
360 |
<li> <b>-r</b>: rotate the image by 180 degrees
|
|
|
361 |
</ul>
|
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|
362 |
|
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|
363 |
Also, new features merged with code for shrinking/overlapping.
|
|
|
364 |
|
|
|
365 |
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Don't emit BeginData/EndData
|
|
|
366 |
DSC comments since we are unable to properly include the amount to skip
|
|
|
367 |
as per bug 80.
|
|
|
368 |
|
|
|
369 |
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Added workaround for some
|
|
|
370 |
software that may crash when last strip of image contains fewer number
|
|
|
371 |
of scanlines than specified by the `/Height' variable as per bug 164.
|
|
|
372 |
|
|
|
373 |
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: Patch from John Williams to add new
|
|
|
374 |
functionality for tiff2ps utility splitting long images in several pages as
|
|
|
375 |
per bug 142. New switches:
|
|
|
376 |
<ul>
|
|
|
377 |
<li> <b>-H #</b>: split image if height is more than # inches
|
|
|
378 |
<li> <b>-L #</b>: overLap split images by # inches
|
|
|
379 |
</ul>
|
|
|
380 |
|
|
|
381 |
<li> <a href=./man/tiff2ps.1.html>tiff2ps</a>: New commandline
|
|
|
382 |
switches to override resolution units obtained from the input file per bug 131:
|
|
|
383 |
<ul>
|
|
|
384 |
<li> <b>-x</b>: override resolution units as centimeters
|
|
|
385 |
<li> <b>-y</b>: override resolution units as inches
|
|
|
386 |
</ul>
|
|
|
387 |
|
|
|
388 |
<li> <a href=./man/fax2tiff.1.html>fax2tiff</a>: Updated to reflect
|
|
|
389 |
latest changes in libtiff per bug 125.
|
|
|
390 |
|
|
|
391 |
<li> tiff2ps: Division by zero fixed as per bug 88.
|
|
|
392 |
|
|
|
393 |
<li> <a href=./man/tiffcp.1.html>tiffcp<a>:
|
|
|
394 |
Added support for 'Orientation' tag.
|
|
|
395 |
|
|
|
396 |
<li> <a href=./man/tiffdump.1.html>tiffdump</a>:
|
|
|
397 |
include TIFFTAG_JPEGTABLES in tag list.
|
|
|
398 |
|
|
|
399 |
<li> tiffset: fix bug in error reporting.
|
|
|
400 |
|
|
|
401 |
</UL>
|
|
|
402 |
|
|
|
403 |
<P><HR WIDTH=65% ALIGN=left>
|
|
|
404 |
|
|
|
405 |
<!--------------------------------------------------------------------------->
|
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|
406 |
|
|
|
407 |
<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>
|
|
|
408 |
<UL>
|
|
|
409 |
|
|
|
410 |
<li> Fixed distribution to include contrib/addtiffo/tif_ovrcache.{c,h}.
|
|
|
411 |
<li> libtiff/contrib/win95: renamed to contrib/win_dib. Added new
|
|
|
412 |
Tiffile.cpp example of converting TIFF files into a DIB on Win32 as per
|
|
|
413 |
bug 143.
|
|
|
414 |
|
|
|
415 |
</UL>
|
|
|
416 |
|
|
|
417 |
<!--------------------------------------------------------------------------->
|
|
|
418 |
|
|
|
419 |
<A NAME="lzwkit"><B><FONT SIZE=+3>C</FONT>HANGES IN THE LZW COMPRESSION
|
|
|
420 |
KIT:</B></A>
|
|
|
421 |
<UL>
|
|
|
422 |
|
|
|
423 |
<li> LZW compression kit synchronized with actual libtiff version.
|
|
|
424 |
|
|
|
425 |
</UL>
|
|
|
426 |
|
|
|
427 |
<A HREF="index.html"><IMG SRC="images/back.gif"></A> TIFF home page.<BR>
|
|
|
428 |
|
|
|
429 |
<HR>
|
|
|
430 |
|
|
|
431 |
Last updated $Date: 2003/10/04 11:38:17 $.
|
|
|
432 |
|
|
|
433 |
</BODY>
|
|
|
434 |
</HTML>
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