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Edit: /usr/share/doc/libtiff-devel/html/v4.1.0.html (5955B)

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>
 Changes in TIFF v4.1.0
</TITLE>
<STYLE TYPE="text/css">
body {
 font-family: Helvetica, Arial, Sans;
}
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;
}

hr {
    width: 65%;
}

</STYLE>
</HEAD>

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

<div style="margin-left: 3em">
<HR SIZE=4 ALIGN=left>
Current Version: v4.1.0 
Previous Version: <A HREF=v4.0.10.html>v4.0.10</A> 
Master Download Site: <A HREF="https://download.osgeo.org/libtiff"</A>
download.osgeo.org</a>, directory pub/libtiff 
Master HTTP Site #1: <A HREF="http://www.simplesystems.org/libtiff/"</A>
http://www.simplesystems.org/libtiff/</a> 
Master HTTP Site #2: <A HREF="http://libtiff.maptools.org/"</A>
http://libtiff.maptools.org/</a>
<HR SIZE=4 ALIGN=left>
</div>

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. 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>

<HR ALIGN=left>

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

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

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

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

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

cmd: