<HTML>
<HEAD>
<TITLE>
Changes in TIFF v3.4beta007
</TITLE>
</HEAD>

<BODY>

<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>: v3.4beta007<BR>
<B>Previous Version</B>: v3.4beta004<BR>
<B>Master FTP Site</B>: <A HREF="ftp://ftp.sgi.com/graphics/tiff">ftp.sgi.com (192.48.153.1), directory graphics/tiff</A><BR>
<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="#configure">Changes in the software configuration</A>
<LI><A HREF="#libtiff">Changes in libtiff</A>
<LI><A HREF="#port">Changes in the portability support</A>
<LI><A HREF="#tools">Changes in the tools</A>
</UL>

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

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

<UL>
<LI>bit order was corrected for Pentium systems
<LI>a new define, <TT>HOST_BIGENDIAN</TT>, was added for code that
   wants to statically use information about native cpu byte order
</UL>

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

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

<UL>
<LI>the G3/G4 decoder was replaced by a new one that is faster and
   has smaller state tables
<LI>Niles Ritter's client tag extension hooks were added
<LI>a new routine <TT>TIFFCurrentDirOffset</TT> was added for
   applications that want to find out the file offset of a TIFF directory
<LI>the calculation of the number of strips in an image was corected
   for images with certain esoteric configurations
<LI>a potential memory leak (very unlikely) was plugged
<LI>the <TT>TIFFReadRGBAImage</TT> support was completely rewritten
   and new, more flexible support was added for reading images into
   a fixed-format raster
<LI>YCbCr to RGB conversion done in the <TT>TIFFReadRGBAImage</TT> support
   was optimized
<LI>a bug in JPEG support calculation of strip size was corrected
<LI>the LZW decoder was changed to initialize the code table to zero
   to lessen potential problems that arise when invalid data is decoded
<LI><B>tiffcomp.h</B> is now aware of OS/2
<LI>some function prototypes in <B>tiffio.h</B> and <B>tiffiop.h</B>
   that contained parameter
   names have been changed to avoid complaints from certain compilers
</UL>

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

<A NAME="port"><B><FONT SIZE=+3>C</FONT>HANGES IN THE PORTABILITY SUPPORT:</B></A>

<UL>
<LI><B>Makefile.in</B> has been corrected to use the parameters
   chosen by the configure script
</UL>

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

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

<UL>
<LI><TT>fax2ps</TT> has been rewritten and moved over from the user
   contributed software
<LI>an uninitialized variable in <TT>pal2rgb</TT> has been fixed
<LI><TT>ras2tiff</TT> now converts 24-bit RGB raster data so that
   samples are written in the proper order
<LI><TT>tiff2ps</TT> has been updated to include fixes
    and enhancements from Alberto Accomazzi
<LI><TT>tiffcp</TT> now has a <TT>-o</TT> option to select a directory
    by file offset
<LI><TT>tiffinfo</TT> is now capable of displaying the raw undecoded
    image data in a file
<LI><TT>tiffgt</TT> has been rewritten to use the new <TT>TIFFRGBAImage</TT>
   support and to handle multiple files
</UL>

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

<HR>

<ADDRESS>
<A HREF="sam.html">Sam Leffler</A> / <A HREF="mailto:sam@engr.sgi.com">sam@engr.sgi.com</A>
Last updated $Date: 1995/07/03 18:00:06 $.
</ADDRESS>

</BODY>
</HTML>
