Added release summary page for the 4.1.0 release.

author: Bob Friesenhahn <bfriesen@simple.dallas.tx.us> 2019-11-03 13:31:26 -0600
committer: Bob Friesenhahn <bfriesen@simple.dallas.tx.us> 2019-11-03 13:31:26 -0600
commit: 014441b770f2f4aff91c65785c941fdefaedc737 (patch)
tree: 373fcab7953da6b873c9561816149f4d25c9c782
parent: f18e1a2db5c2069b20a9cea71a88a22cef5fd057 (diff)
download: libtiff-git-014441b770f2f4aff91c65785c941fdefaedc737.tar.gz
1 files changed, 198 insertions, 0 deletions
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+<HTML>
+<HEAD>
+<TITLE>
+        Changes in TIFF v4.1.0
+</TITLE>
+<STYLE>
+table, th, td {
+    border: 1px solid black;
+    border-collapse: collapse;
+}
+th, td {
+    padding: 8pt;
+    text-align: center;
+}
+th {
+    text-align: center;
+}
+td {
+    text-align: center;
+}
+
+ul li {
+    padding: 3pt;
+}
+
+ul.a {
+    list-style-type: circle;
+}
+
+ul.b {
+    list-style-type: square;
+}
+
+ol.c {
+    list-style-type: upper-roman;
+}
+
+ol.d {
+    list-style-type: lower-alpha;
+}
+
+</STYLE>
+</HEAD>
+
+<BODY BGCOLOR=white>
+<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>: v4.1.0<BR>
+<B>Previous Version</B>: <A HREF=v4.0.10.html>v4.0.10</a><BR>
+<B>Master Download Site</B>: <A HREF="https://download.osgeo.org/libtiff">
+download.osgeo.org</a>, directory pub/libtiff</A><BR>
+<B>Master HTTP Site #1</B>: <A HREF="http://www.simplesystems.org/libtiff/">
+http://www.simplesystems.org/libtiff/</a><BR>
+<B>Master HTTP Site #2</B>: <A HREF="http://libtiff.maptools.org/">
+http://libtiff.maptools.org/</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. A change summary is also provided by the
+ChangeLog file included in the release package and by the Git commit
+history:
+<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>
+<p>
+<P><HR WIDTH=65% ALIGN=left>
+
+<!--------------------------------------------------------------------------->
+
+<A NAME="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>
+
+<UL>
+
+  <LI>Make defer strile offset/bytecount loading available at runtime
+    and add per-strile offset/bytecount loading capabilities. Part of
+    this commit makes the behaviour that was previously met when libtiff
+    was compiled with -DDEFER_STRILE_LOAD available for default builds
+    when specifying the new 'D' (Deferred) TIFFOpen() flag. In that
+    mode, the [Tile/Strip][ByteCounts/Offsets] arrays are only loaded
+    when first accessed. This can speed-up the opening of files stored
+    on the network when just metadata retrieval is needed.
+
+    Another addition is the capability of loading only the values of
+    the offset/bytecount of the strile of interest instead of the
+    whole array. This is enabled with the new 'O' (Ondemand) flag of
+    TIFFOpen() (which implies 'D').
+
+    The public TIFFGetStrileOffset[WithErr]() and
+    TIFFGetStrileByteCount[WithErr]() functions have been added to
+    API. They are of particular interest when using sparse files (with
+    offset == bytecount == 0) and you want to detect if a strile is
+    present or not without decompressing the data, or updating an
+    existing sparse file.
+  </LI>
+
+  <LI>The BigTIFF writer now optimizes file size by using 32-bit LONG
+    values (rather than 64-bit) where it is reasonable and safe to do
+    so.  Likewise, the 16-bit SHORT type is used when possible for
+    StripByteCounts/TileByteCounts.
+  </LI>
+
+</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>The WIN32 build now uses tif_win32.c when building with CMake.</LI>
+
+  <LI>Properly set value of HOST_FILLORDER to LSB2MSB for Windows
+  CMake builds.  It was not being properly set!</LI>
+
+</UL>
+
+<P><HR WIDTH=65% ALIGN=left>
+
+<!--------------------------------------------------------------------------->
+
+<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>
+
+<UL>
+
+  <LI>
+    Changes in the libtiff library may be viewed on-line
+    at <A HREF="https://gitlab.com/libtiff/libtiff/commits/master/libtiff">Libtiff
+    Library Commits</A>.
+  </LI>
+
+  <LI>
+    New function TIFFReadFromUserBuffer() which replaces the use of
+    TIFFReadEncodedStrip()/TIFFReadEncodedTile() when the user can
+    provide the buffer for the input data, for example when he wants
+    to avoid libtiff to read the strile offset/count values from the
+    [Strip|Tile][Offsets/ByteCounts] array.
+  </LI>
+
+  <LI>
+    New functions TIFFDeferStrileArrayWriting() and TIFFForceStrileArrayWriting()
+    Those advanced writing functions must be used in a particular sequence
+    to make their intended effect. Their aim is to control when/where
+    the [Strip/Tile][Offsets/ByteCounts] arrays are written into the file.
+
+    The purpose of this is to generate 'cloud-optimized geotiff' files where
+    the first KB of the file only contain the IFD entries without the potentially
+    large strile arrays. Those are written afterwards.
+  </LI>
+
+</UL>
+
+<P><HR WIDTH=65% ALIGN=left>
+
+<!-------------------------------------------------------------------------->
+
+<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>
+
+<UL>
+
+  <LI>Changes in the libtiff utilities may be viewed on-line
+  at <A HREF="https://gitlab.com/libtiff/libtiff/commits/master/tools">Libtiff
+  Tools Commits</A></LI>
+
+</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>Changes in the libtiff contrib area may be viewed on-line
+  at <A HREF="https://gitlab.com/libtiff/libtiff/commits/master/contrib">Libtiff
+  Contrib Commits</A></LI>
+
+</UL>
+
+</BODY>
+</HTML>
author	Bob Friesenhahn <bfriesen@simple.dallas.tx.us>	2019-11-03 13:31:26 -0600
committer	Bob Friesenhahn <bfriesen@simple.dallas.tx.us>	2019-11-03 13:31:26 -0600
commit	014441b770f2f4aff91c65785c941fdefaedc737 (patch)
tree	373fcab7953da6b873c9561816149f4d25c9c782
parent	f18e1a2db5c2069b20a9cea71a88a22cef5fd057 (diff)
download	libtiff-git-014441b770f2f4aff91c65785c941fdefaedc737.tar.gz