Changeset a249d64 for general/graphlib
- Timestamp:
- 07/06/2004 05:11:12 AM (20 years ago)
- Branches:
- 10.0, 10.1, 11.0, 11.1, 11.2, 11.3, 12.0, 12.1, 6.0, 6.1, 6.2, 6.2.0, 6.2.0-rc1, 6.2.0-rc2, 6.3, 6.3-rc1, 6.3-rc2, 6.3-rc3, 7.10, 7.4, 7.5, 7.6, 7.6-blfs, 7.6-systemd, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, basic, bdubbs/svn, elogind, gnome, kde5-13430, kde5-14269, kde5-14686, kea, ken/TL2024, ken/inkscape-core-mods, ken/tuningfonts, krejzi/svn, lazarus, lxqt, nosym, perl-modules, plabs/newcss, plabs/python-mods, python3.11, qt5new, rahul/power-profiles-daemon, renodr/vulkan-addition, systemd-11177, systemd-13485, trunk, upgradedb, xry111/intltool, xry111/llvm18, xry111/soup3, xry111/test-20220226, xry111/xf86-video-removal
- Children:
- cebbbb5
- Parents:
- e578536
- File:
-
- 1 edited
Legend:
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- Added
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general/graphlib/libungif.xml
re578536 ra249d64 20 20 <title>Introduction to <application>libungif</application></title> 21 21 22 <para>The libungif package contains libraries for reading all 23 <acronym>GIF</acronym>s and writing non-compressed ones as well as programs for 24 converting and working with <acronym>GIF</acronym> files. The libraries are 25 useful for any graphics program wishing to deal with <acronym>GIF</acronym> 26 files while the programs are useful for conversion purposes as well as cleaning 27 up images.</para> 28 29 <para>The reason libungif only writes non-compressed <acronym>GIF</acronym>s 30 is due to a legal issue with <acronym>LZW</acronym> compression (which Unisys 31 claims a patent on). Reading <acronym>GIF</acronym>s is not a problem as the 32 decompression routines do not seem to be limited in this way. Note that this 33 has in the past been disputed. The best way to avoid this whole mess is to 34 simply use libungif for looking at <acronym>GIF</acronym> images on the web, 35 while in any pages which you design, use the open source <acronym>PNG</acronym> 36 format instead (which uses, not surprisingly, the libpng library) which has no 37 patent issues at all.</para> 22 <para>The <application>libungif</application> package contains libraries for 23 reading all <acronym>GIF</acronym>s and writing non-compressed ones as well as 24 programs for converting and working with <acronym>GIF</acronym> files. The 25 libraries are useful for any graphics program wishing to deal with 26 <acronym>GIF</acronym> files while the programs are useful for conversion 27 purposes as well as cleaning up images.</para> 28 29 <para>The reason <application>libungif</application> only writes non-compressed 30 <acronym>GIF</acronym>s is due to a legal issue with <acronym>LZW</acronym> 31 compression (which Unisys claims a patent on). Reading <acronym>GIF</acronym>s 32 is not a problem as the decompression routines do not seem to be limited in 33 this way. Note that this has in the past been disputed. The best way to avoid 34 this whole mess is to simply use <application>libungif</application> for 35 looking at <acronym>GIF</acronym> images on the web, while in any pages which 36 you design, use the open source <acronym>PNG</acronym> format instead (which 37 uses, not surprisingly, the <application>libpng</application> library) which 38 has no patent issues at all.</para> 38 39 39 40 <sect3><title>Package information</title> … … 51 52 url="&patch-root;/libungif-&libungif-version;-va_start-1.patch"/></para></listitem> 52 53 </itemizedlist> 54 </sect3> 55 56 <sect3><title><application>libungif</application> dependencies</title> 57 <sect4><title>Optional</title> 58 <para>X (<xref linkend="xfree86"/> or <xref linkend="xorg"/>)</para></sect4> 53 59 </sect3> 54 60 … … 108 114 109 115 <sect3><title>gif2rgb</title> 110 <para>Convert images saved as <acronym>GIF</acronym> to 24-bit <acronym>RGB111 < /acronym> image(s).</para></sect3>116 <para>Convert images saved as <acronym>GIF</acronym> to 24-bit 117 <acronym>RGB</acronym> image(s).</para></sect3> 112 118 113 119 <sect3><title>gifasm</title> … … 169 175 170 176 <sect3><title>gifpos</title> 171 <para>Change a GIF's screen size or recondition it.</para></sect3> 177 <para>Change a <acronym>GIF</acronym>'s screen size or recondition 178 it.</para></sect3> 172 179 173 180 <sect3><title>gifrotat</title>
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