22

✏️ Editing: v4.0.5.html

<HTML>
<HEAD>
<TITLE>
	Changes in TIFF v4.0.5
</TITLE>
</HEAD>

<BASEFONT SIZE=4>
TIFF CHANGE INFORMATION
<BASEFONT SIZE=3>

<UL>
<HR SIZE=4 WIDTH=65% ALIGN=left>
Current Version: v4.0.5 
Previous Version: <A HREF=v4.0.4.html>v4.0.4</a> 
Master FTP Site: <A HREF="ftp://download.osgeo.org/libtiff">
download.osgeo.org</a>, directory pub/libtiff</A> 
Master HTTP Site: <A HREF="http://www.simplesystems.org/libtiff/">
http://www.simplesystems.org/libtiff/</a> 
<HR SIZE=4 WIDTH=65% ALIGN=left>
</UL>

This document describes the changes made to the software between the
previous and current 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="#highlights">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>
</UL>
 
<HR WIDTH=65% ALIGN=left>

<A NAME="highlights">MAJOR CHANGES:</A>

<UL>

<li> Support for configure/build using CMake.
	<li> Support for large (> 2GB) files under Microsoft Windows.

</UL>

<A NAME="configure">CHANGES IN THE SOFTWARE CONFIGURATION:</A>

<UL>

<LI> CMakeLists.txt / CMake
 <UL>
 <LI> Configuration and building using CMake is now supported
 under Microsoft Windows and on Unix-type systems.
 </UL>
 </LI>

<LI> configure.ac / configure
 <UL>
 <LI> Test for and use fseeko() if it is available. This allows
 supporting large files on Unix-type systems with a 32-bit 'long'
 type and a 64-bit 'off_t' type.
 </UL>
 </LI>

</UL>

<A NAME="libtiff">CHANGES IN LIBTIFF:</A>

<UL>

<LI> tiffiop.h:
 <UL>
 <LI> Macros added to use 64-bit equivalents for all standard I/O
 and POSIX APIs used by libtiff and its tools which are limited
 to 2GB in Windows builds. Note that these 64-bit equivalents
 were introduced by the CRT provided with Visual Studio 2005 and
 if the necessary CRT is not installed on the target computer,
 the program will not run. The wrapper macros will not be
 activated unless the definition _MSC_VER is at least 1400 or
 __MSVCRT_VERSION__ is at least 0x800.
 </UL>

<LI> tif_unix.c:
 <UL>
 <LI> Updated to support large files under Microsoft Windows.
 This makes tif_unix.c a completely viable candidate for use
 under Windows (in spite of its name) if the CRT is modern
 enough. Please note that tif_win32.c already supported large
 files, but only 'tiffinfo' and 'tiffdump' made any provision to
 support large files under Windows.
 <LI> _tiffReadProc() and _tiffWriteProc() are modified to chunk
 I/O to a maximum size of 2GB for extremely large I/O
 requests. This surmounts limitations in the Microsoft Windows
 read() and write() APIs (which are limited to the range of a
 32-bit 'int'), and may avoid poor behavior with extremely large
 I/O requests on other systems.
 </UL>

</UL>

<A NAME="tools">CHANGES IN THE TOOLS:</A>

<UL>

<LI> All tools
 <UL>
 <LI> Updated to use I/O wrapper macros from tiffiop.h in order
 to support large files under Microsoft Windows.
 </UL>

</UL>

<A NAME="contrib">CHANGES IN THE CONTRIB AREA:</A>

<UL>

<LI> None

</UL>

Last updated $Date: 2016-09-25 20:05:47 $.

</BODY>
</HTML>

MR SKB