晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Changes in TIFF v3.5.3
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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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<UL>
<HR SIZE=4 WIDTH=65% ALIGN=left>
<B>Current Version</B>: v3.5.3<BR>
<B>Previous Version</B>: <A HREF=v3.5.2.html>v3.5.2</a><BR>
<B>Master FTP Site</B>: <A HREF="ftp://ftp.onshore.com/pub/libtiff">ftp.onshore.com</a>, directory pub/libtiff</A><BR>
<B>Master HTTP Site</B>: <A HREF="http://www.simplesystems.org/libtiff//">http://www.simplesystems.org/libtiff/</a> 
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<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="#configure">Changes in the software configuration</A>
<LI><A HREF="#libtiff">Changes in libtiff</A>
<LI><A HREF="#tools">Changes in the tools</A>
</UL>
<p> 
The ChangeLog will follow, but please note the most important change: 
LZW compression has been removed. 
<p>
Unisys has the patent on LZW compression and have been very active in
their enforcement of late, demanding payments of $5000 or more from
websites using unlicensed software to create GIF's.  They could well
do the same do persons using libtiff to create LZW compressed TIFF
images.
<p> 
From <A HREF=http://burnallgifs.org>Burn All GIF's Day</a>:
<br> 
<em>The catch is that it appears to be difficult or impossible to get a
Unisys license to use LZW in free software that complies with the Open
Source Definition</em>
<P>
Unfortunatly, the removal of LZW compression means that saved image size has
grown dramatically.  Without a change in the TIFF spec to support
another lossless compression format, this is unavoidable.
<P>
The library can use zip for lossless compression, but as this is not
part of the spec, TIFFs using zip compression may not work with other
software
<P> 
We will be making a patch available that will contain the LZW
compression code for users who have either obtained a license from
Unisys or are willing to risk it. 
<p> 
LZW decompression is unchanged. 
<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> Added zip creation to release makefile target 


</UL>

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<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>


<UL> 

	<LI> Added html for TIFFWriteTile.3t man page. 
	
	<LI> Added some changes to tif_write.c to support rewriting existing
	fixed sized tiles and strips.  Code mods disabled by default, only
	enabled if REWRITE_HACK is defined for now.

	<LI> Added TIFFWriteTile.3t man page.

	<LI> Added notes on use of makefile.vc in build.html, and fixed 
	email subscription address.

	<LI>  Fixed apocalypse-inducing y2k bug in contrib/ras/ras2tiff.c 

	<LI>  Did some casts cleaning up to reduce compiler warnings in tif_fax3.c,
	   from Bruce Carmeron <cameron@petris.com> -- modifications of 
	   changes made by Frank (sun cc still complained on cast). 

	<LI> fixed various VC++ warnings as suggested by Gilles Vollant
	<info@winimage.com>.  

	<LI> Modified TIFFquery.3t man pages info on TIFFIsByteSwapped() to
	not imply applications are responsible for image data swapping.

	<LI>  HTML-ized the man pages, added to html/man
	
	<LI>  Removed LZW Compression to comply with Unisys patent extortion. 

	<LI>  Corrected one remaining 16 -> 32 bit value in tif_fax3.c, 
	   From Ivo Penzar <ivo.penzar@infolink-software.com. 

	<LI>  Added patch from Ivo Penzar to have TiffAdvanceDirectory handle
	   memory mapped files. <ivo.penzar@infolink-software.com>
</UL>

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

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

<UL>
	<LI> Fixed apocalypse-inducing y2k bug in contrib/ras/ras2tiff.c 
</UL>

<A HREF="index.html"><IMG SRC="images/back.gif"></A> TIFF home page.<BR>

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

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