| | 1 | <HTML> |
| | 2 | <HEAD> |
| | 3 | <TITLE> |
| | 4 | Changes in TIFF v3.5.3 |
| | 5 | </TITLE> |
| | 6 | </HEAD> |
| | 7 | |
| | 8 | <BODY BGCOLOR=white> |
| | 9 | <FONT FACE="Arial, Helvetica, Sans"> |
| | 10 | <FONT FACE="Arial, Helvetica, Sans"> |
| | 11 | |
| | 12 | <BASEFONT SIZE=4> |
| | 13 | <B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B> |
| | 14 | <BASEFONT SIZE=3> |
| | 15 | |
| | 16 | <UL> |
| | 17 | <HR SIZE=4 WIDTH=65% ALIGN=left> |
| | 18 | <B>Current Version</B>: v3.5.3<BR> |
| | 19 | <B>Previous Version</B>: <A HREF=v3.5.2.html>v3.5.2</a><BR> |
| | 20 | <B>Master FTP Site</B>: <A HREF="ftp://ftp.onshore.com/pub/libtiff">ftp.onshore.com</a>, directory pub/libtiff</A><BR> |
| | 21 | <B>Master HTTP Site</B>: <A HREF="http://www.remotesensing.org/libtiff/">http://www.remotesensing.org/libtiff</a> |
| | 22 | <HR SIZE=4 WIDTH=65% ALIGN=left> |
| | 23 | </UL> |
| | 24 | |
| | 25 | <P> |
| | 26 | This document describes the changes made to the software between the |
| | 27 | <I>previous</I> and <I>current</I> versions (see above). |
| | 28 | If you don't find something listed here, then it was not done in this |
| | 29 | timeframe, or it was not considered important enough to be mentioned. |
| | 30 | The following information is located here: |
| | 31 | <UL> |
| | 32 | <LI><A HREF="#configure">Changes in the software configuration</A> |
| | 33 | <LI><A HREF="#libtiff">Changes in libtiff</A> |
| | 34 | <LI><A HREF="#tools">Changes in the tools</A> |
| | 35 | </UL> |
| | 36 | <p> |
| | 37 | The ChangeLog will follow, but please note the most important change: |
| | 38 | LZW compression has been removed. |
| | 39 | <p> |
| | 40 | Unisys has the patent on LZW compression and have been very active in |
| | 41 | their enforcement of late, demanding payments of $5000 or more from |
| | 42 | websites using unlicensed software to create GIF's. They could well |
| | 43 | do the same do persons using libtiff to create LZW compressed TIFF |
| | 44 | images. |
| | 45 | <p> |
| | 46 | From <A HREF=http://burnallgifs.org>Burn All GIF's Day</a>: |
| | 47 | <br> |
| | 48 | <em>The catch is that it appears to be difficult or impossible to get a |
| | 49 | Unisys license to use LZW in free software that complies with the Open |
| | 50 | Source Definition</em> |
| | 51 | <P> |
| | 52 | Unfortunatly, the removal of LZW compression means that saved image size has |
| | 53 | grown dramatically. Without a change in the TIFF spec to support |
| | 54 | another lossless compression format, this is unavoidable. |
| | 55 | <P> |
| | 56 | The library can use zip for lossless compression, but as this is not |
| | 57 | part of the spec, TIFFs using zip compression may not work with other |
| | 58 | software |
| | 59 | <P> |
| | 60 | We will be making a patch available that will contain the LZW |
| | 61 | compression code for users who have either obtained a license from |
| | 62 | Unisys or are willing to risk it. |
| | 63 | <p> |
| | 64 | LZW decompression is unchanged. |
| | 65 | <p> |
| | 66 | <P><HR WIDTH=65% ALIGN=left> |
| | 67 | |
| | 68 | <A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A> |
| | 69 | |
| | 70 | <UL> |
| | 71 | <LI> Added zip creation to release makefile target |
| | 72 | |
| | 73 | |
| | 74 | </UL> |
| | 75 | |
| | 76 | <P><HR WIDTH=65% ALIGN=left> |
| | 77 | |
| | 78 | <A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A> |
| | 79 | |
| | 80 | |
| | 81 | <UL> |
| | 82 | |
| | 83 | <LI> Added html for TIFFWriteTile.3t man page. |
| | 84 | |
| | 85 | <LI> Added some changes to tif_write.c to support rewriting existing |
| | 86 | fixed sized tiles and strips. Code mods disabled by default, only |
| | 87 | enabled if REWRITE_HACK is defined for now. |
| | 88 | |
| | 89 | <LI> Added TIFFWriteTile.3t man page. |
| | 90 | |
| | 91 | <LI> Added notes on use of makefile.vc in build.html, and fixed |
| | 92 | email subscription address. |
| | 93 | |
| | 94 | <LI> Fixed apocalypse-inducing y2k bug in contrib/ras/ras2tiff.c |
| | 95 | |
| | 96 | <LI> Did some casts cleaning up to reduce compiler warnings in tif_fax3.c, |
| | 97 | from Bruce Carmeron <cameron@petris.com> -- modifications of |
| | 98 | changes made by Frank (sun cc still complained on cast). |
| | 99 | |
| | 100 | <LI> fixed various VC++ warnings as suggested by Gilles Vollant |
| | 101 | <info@winimage.com>. |
| | 102 | |
| | 103 | <LI> Modified TIFFquery.3t man pages info on TIFFIsByteSwapped() to |
| | 104 | not imply applications are responsible for image data swapping. |
| | 105 | |
| | 106 | <LI> HTML-ized the man pages, added to html/man |
| | 107 | |
| | 108 | <LI> Removed LZW Compression to comply with Unisys patent extortion. |
| | 109 | |
| | 110 | <LI> Corrected one remaining 16 -> 32 bit value in tif_fax3.c, |
| | 111 | From Ivo Penzar <ivo.penzar@infolink-software.com. |
| | 112 | |
| | 113 | <LI> Added patch from Ivo Penzar to have TiffAdvanceDirectory handle |
| | 114 | memory mapped files. <ivo.penzar@infolink-software.com> |
| | 115 | </UL> |
| | 116 | |
| | 117 | <P><HR WIDTH=65% ALIGN=left> |
| | 118 | |
| | 119 | <A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A> |
| | 120 | |
| | 121 | <UL> |
| | 122 | <LI> Fixed apocalypse-inducing y2k bug in contrib/ras/ras2tiff.c |
| | 123 | </UL> |
| | 124 | |
| | 125 | <A HREF="index.html"><IMG SRC="images/back.gif"></A> TIFF home page.<BR> |
| | 126 | |
| | 127 | <HR> |
| | 128 | |
| | 129 | Last updated $Date: 2004/11/26 14:37:20 $. |
| | 130 | |
| | 131 | </BODY> |
| | 132 | </HTML> |
projects / wxWidgets.git / blame_incremental