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<TITLE>
	Changes in TIFF v3.7.0alpha
</TITLE>
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<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>: v3.7.0alpha<BR>
<B>Previous Version</B>: <A HREF=v3.6.1.html>v3.6.1</a><BR>
<B>Master FTP Site</B>: <A HREF="ftp://download.osgeo.org/libtiff">
download.osgeo.org</a>, directory pub/libtiff</A><BR>
<B>Master HTTP Site</B>: <A HREF="http://www.simplesystems.org/libtiff/">
http://www.simplesystems.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> Significant changes in software configuration: we are switched
	to GNU autotools now.
	
	<li> tiffset: tiffset now can set any libtiff supported tags. Tags
	can be supplied by the mnemonic name or number.
</ul>


<P><HR WIDTH=65% ALIGN=left>
<!--------------------------------------------------------------------------->

<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>

<UL>
	<li> Get rid of the old configuration system and switch to
	GNU autotools.
</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_ojpeg.c: Fixed problem with duplicated SOI and SOF
	markers as per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=581"
		http://bugzilla.remotesensing.org/show_bug.cgi?id=581</a>.

	<li> libtiff/{tif_open.c, tiffio.h}: New function added:
	TIFFIsBigEndian(). Function returns nonzero if given was file written
	in big-endian order.

	<li> libtiff/tif_print.c: added (untested) support for printing
	SSHORT, SLONG and SRATIONAL fields.

	<li> libtiff/tif_fax3.c: Avoid reading CCITT compression options
	if compression type mismatches. See
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=565">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=565</a>.

	<li> libtiff/tif_strip.c: Never return 0 from the TIFFNumberOfStrips().

	<li> libtiff/tif_dirread.c: Workaround for broken TIFF writers which
	store single SampleFormat value for multisampled images. See
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=562">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=562</a>.

	<li> libtiff/tif_write.c: Allow in-place updating of the compressed
	images (don't work properly with all codecs). For details see GDAL bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=534">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=534</a>.

	<li> libtiff/tif_jpeg.c: Workaround for wrong sampling factors used
	in the Intergarph JPEG compressed TIFF images as per bug:
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=532">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=532</a>.

	<li> libtiff/tif_open.c: Use dummy mmap/munmap functions in
	TIFFClientOpen() when the appropriate client functions was not
	supplied by user.

	<li> libtiff/tif_dirread.c: Fixed problem with handling TIFF_UNDEFINED
	tag type in TIFFFetchNormalTag() as per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=508"
		http://bugzilla.remotesensing.org/show_bug.cgi?id=508</a>.

	<li> libtiff/tif_codec.c: Fixed typo in TIFFInitPackBits name as per:
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=494">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=494</a>.

	<li> libtiff/tif_fax3.c: Fixed problem, introdiced in 3.6.1 release,
	with the CCITT encoding modes as per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=483">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=483</a>.
        We need more work on fax codec to support update mode.

	<li> libtiff/tiff.h: Fixed tag definitions for TIFFTAG_YCLIPPATHUNITS
	and TIFFTAG_INDEXED as per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=475">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=475</a>.

	<li> libtiff/{tif_win32.c, tif_unix.c}: Check whether the pointer is
	NULL before proceeding further as per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=474">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=474</a>.
	Check results, returned by the TIFFFdOpen() before returning and close
	file if TIFFFdOpen() failed as per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=468">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=468</a>.

	<li> libtiff/{libtiff.def, tif_close.c, tiffio.h, tif_open.c}:
	Separate TIFFCleanup() from the TIFFClose() in order to fix the bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=468">
	http://bugzilla.remotesensing.org/show_bug.cgi?id=468</a>.

	<li> libtiff/tif_dirwrite.c: Fixed handling of writable ASCII tags
	that are field_passcount=TRUE properly.  Arguably anonymous custom
	tags should be declared as passcount=FALSE, but I don't want to change
	that without a careful review.

	<li> libtiff/tif_write.c: Fixed reporting size of the buffer in case
	of stripped image in TIFFWriteBufferSetup(). As per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=460">
	http://bugzilla.remotesensing.org/show_bug.cgi?id=460</a>.
				
	<li> libtiff/tif_dir.c: Incomplete cleanup in TIFFFreeDirectory(),
	patch from Gerben Koopmans.

	<li> libtiff/tif_dirread.c: Check field_passcount value before setting
	the value of undefined type, patch from Gerben Koopmans.		

	<li> libtiff/{tiff.h, tif_fax3.c}:Fixes for AMD 64 platform as
	suggested by Jeremy C. Reed.			

	<li> libtiff/tif_win32.c: Fixed problem with _TIFFrealloc() when
	the NULL pointer passed. Patch supplied by Larry Grill.

</UL>

<P><HR WIDTH=65% ALIGN=left>

<!-------------------------------------------------------------------------->
	
<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>

<UL>
	<li> tiffset: tiffset now can set any libtiff supported tags. Tags
	can be supplied by the mnemonic name or number.

	<li> ycbcr.c: fixed main() declaration as per:
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=513">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=513</a>.

	<li> <a href=./man/tiffsplit.1.html>tiffsplit</a>: Don't forget
	to copy Photometric Interpretation tag.
	
	<li> <a href=./man/tiffsplit.1.html>tiffsplit</a>: Fixed problem with
	unproperly written multibyte files. Now output files will be written
	using the same byte order flag as in the input image. See
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=574"
		http://bugzilla.remotesensing.org/show_bug.cgi?id=574</a>.

	<li> <a href=./man/tiffsplit.1.html>tiffsplit</a>: Copy JPEGTables
	tag contents for JPEG compressed images. Reported by Artem Mirolubov.

	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Close output file
	on normal exit.
	
	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Don't emit warnings
	when Orientation tag does not present in the input image.
	
	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Properly set
	Photometric Interpretation in case of JPEG compression of grayscale
	images.
	
	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Fixed problem with wrong
	interpretation of the InkNames tag as per bug
	<a href="http://bugzilla.remotesensing.org/show_bug.cgi?id=466">
		http://bugzilla.remotesensing.org/show_bug.cgi?id=466</a>.
	Memory leak fixed.

	<li> <a href=./man/tiffcp.1.html>tiffcp</a>: Fixed problem with
	wrong Photometric setting for non-RGB images.

</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> Outdated stuff removed.

	<li> Almost all programs are sinchronized with the current libtiff
	and should compile without problems.

</UL>

<!--------------------------------------------------------------------------->

<A NAME="lzwkit"><B><FONT SIZE=+3>C</FONT>HANGES IN THE LZW COMPRESSION
KIT:</B></A>
<UL> 

<li> No changes.

</UL>

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Last updated $Date: 2016-09-25 20:05:45 $.

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