source: pst/printing/gs.xml@ a171a54

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!--  When updating, ensure gs9xx is updated in url -->

  <!ENTITY gs-download-http
  "https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/download/gs&gs-packver;/ghostscript-&gs-version;.tar.xz">
  <!ENTITY gs-download-ftp  " ">
  <!ENTITY gs-md5sum        "72535d31018129a1a8ff636a47ba1f92">
  <!ENTITY gs-size          "53 MB">
  <!ENTITY gs-buildsize     "342 MB (with fonts and libgs.so)">
  <!ENTITY gs-time          "1.8 SBU (Using parallelism=4; with libgs.so)">

  <!ENTITY gs-standard-fonts-download
  "&sourceforge-dl;/gs-fonts/ghostscript-fonts-std-8.11.tar.gz">
  <!ENTITY gs-standard-fonts-md5sum   "6865682b095f8c4500c54b285ff05ef6">
  <!ENTITY gs-standard-fonts-size     "3.7 MB">

  <!ENTITY gs-other-fonts-download
  "&sourceforge-dl;/gs-fonts/gnu-gs-fonts-other-6.0.tar.gz">
  <!ENTITY gs-other-fonts-md5sum      "33457d3f37de7ef03d2eea05a9e6aa4f">
  <!ENTITY gs-other-fonts-size        "796 KB">
]>

<sect1 id="gs" xreflabel="ghostscript-&gs-version;">
  <?dbhtml filename="gs.html"?>

  <sect1info>
    <date>$Date$</date>
  </sect1info>

  <title>ghostscript-&gs-version;</title>

  <indexterm zone="gs">
    <primary sortas="a-Ghostscript">Ghostscript</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Ghostscript</title>

    <para>
      <application>Ghostscript</application> is a versatile processor
      for PostScript data with the ability to render PostScript to different
      targets. It is a mandatory part of the cups printing stack.
    </para>

    &lfs110a_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&gs-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&gs-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &gs-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &gs-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &gs-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &gs-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
<!-- Commenting this out since it's no longer needed, but keeping it for the
         inevitable next time that we need a patch for this package. -->
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Required patch:
          <ulink url="&patch-root;/ghostscript-&gs-version;-upstream_fix-2.patch"/>
        </para>
      </listitem>
    </itemizedlist>

    <para>
      If you wish, you can download additional fonts.
    </para>

    <itemizedlist spacing="compact">
      <title>Standard Fonts</title>
      <listitem>
        <para>
          Download (HTTP): <ulink url="&gs-standard-fonts-download;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &gs-standard-fonts-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &gs-standard-fonts-size;
        </para>
      </listitem>
    </itemizedlist>

    <itemizedlist spacing="compact">
      <title>Other Fonts</title>
      <listitem>
        <para>
          Download (HTTP): <ulink url="&gs-other-fonts-download;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &gs-other-fonts-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &gs-other-fonts-size;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Ghostscript Dependencies</bridgehead>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="cups"/> (required for building the <quote>cups</quote>
      device backend, which is needed by
      <application>cups-filters</application>),
      <xref linkend="fontconfig"/> (required, if you are installing any
      suggested font),
      <xref linkend="freetype2"/>,
      <xref linkend="libjpeg"/>,
      <xref linkend="libpng"/>,
      <xref linkend="libtiff"/>, and
      <xref linkend="openjpeg2"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="cairo"/>,
      <xref linkend="gtk3"/>,
      <xref linkend="libidn"/>,
      <xref linkend="libpaper"/>, and
      <xref linkend="x-window-system"/>
    </para>

    <para condition="html" role="usernotes">
      User Notes: <ulink url="&blfs-wiki;/gs"/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of Ghostscript</title>

    <note>
      <para>
        The <application>Ghostscript</application> build system is not
        user-friendly. In order to use system copies of various graphics
        libraries, you must do it using unconventional methods.
      </para>
    </note>

    <para>
      <application>Ghostscript</application> includes (old) copies of
      several libraries. Some of these seem to have been patched to fix known
      vulnerabilities, but others of these copies are less-well maintained.
      To ensure that any future fixes are applied throughout the whole system,
      it is recommended that you first install the released versions of these
      libraries and then configure <application>Ghostscript</application>
      to link to them.
    </para>

    <para>
      If you have installed the recommended dependencies on your system,
      remove the copies of
      <application>freetype</application>, <application>lcms2</application>,
      <application>libjpeg</application>, <application>libpng</application>,
      and <application>openjpeg</application>:
    </para>

<screen><userinput>rm -rf freetype lcms2mt jpeg libpng openjpeg</userinput></screen>

    <para>
      Apply a patch to prevent a segfault when processing some PDF files and
      to fix a public 0-day in libgs which can be exploited via ImageMagick:
    </para>

<screen><userinput remap="pre">patch -Np1 -i ../ghostscript-&gs-version;-upstream_fix-2.patch</userinput></screen>

    <para>
      Compile <application>Ghostscript</application>:
    </para>

<screen><userinput>rm -rf zlib &amp;&amp;

./configure --prefix=/usr           \
            --disable-compile-inits \
            --enable-dynamic        \
            --with-system-libtiff   &amp;&amp;
make</userinput></screen>

    <note>
      <para>
        The shared library depends on <xref linkend="gtk3"/>. It is only used by
        external programs like <xref linkend="asymptote"/>, <xref
        linkend="dvisvgm"/>, <xref linkend="imagemagick"/>, and <xref
        linkend="texlive"/>.
      </para>
    </note>

    <para>
      To compile the shared library
      <filename class="libraryfile">libgs.so</filename>, run the following
      additional command as an unprivileged user:
    </para>

<screen><userinput>make so</userinput></screen>

    <para>
      This package does not come with a test suite.  A set of example files
      may be used for testing, but it is only possible after installation
      of the package.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>make install</userinput></screen>

    <para>
      If you want the shared library too:
    </para>

<screen role="root"><userinput>make soinstall &amp;&amp;
install -v -m644 base/*.h /usr/include/ghostscript &amp;&amp;
ln -sfvn ghostscript /usr/include/ps</userinput></screen>

    <para>
      Now make the documentation accessible from a standard place:
    </para>
<!-- Starting with 9.23, the install does not seem to copy the examples any more -->

<screen role="root"><userinput>mv -v /usr/share/doc/ghostscript/&gs-version; /usr/share/doc/ghostscript-&gs-version;  &amp;&amp;
rm -rfv /usr/share/doc/ghostscript &amp;&amp;
cp -r examples/ /usr/share/ghostscript/&gs-version;/</userinput></screen>

    <para>
      If you have downloaded the fonts, unpack them to
      <filename class="directory">/usr/share/ghostscript</filename> and ensure
      the ownership of the files are
      <systemitem class="username">root</systemitem>:
      <systemitem class="groupname">root</systemitem>.
    </para>

<screen role="root"><userinput>tar -xvf ../ghostscript-fonts-std-8.11.tar.gz -C /usr/share/ghostscript --no-same-owner &amp;&amp;
tar -xvf ../gnu-gs-fonts-other-6.0.tar.gz     -C /usr/share/ghostscript --no-same-owner &amp;&amp;
fc-cache -v /usr/share/ghostscript/fonts/</userinput></screen>

    <para>
      You can now test the rendering of various postscript and pdf files from the
      <filename class="directory">/usr/share/ghostscript/&gs-version;/examples
      </filename>. To do this, run the following command (in a X Windows display):
    </para>

<screen remap="test"><userinput>gs -q -dBATCH /usr/share/ghostscript/&gs-version;/examples/tiger.eps</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <command>rm -rf zlib </command>: <application>zlib</application>
      was installed as part of LFS.
    </para>

    <para>
      <parameter>--disable-compile-inits</parameter>: This option makes
      <command>gs</command> and <filename>libgs.so</filename> slightly smaller.
    </para>

    <para>
      <parameter>--with-system-libtiff</parameter>: Remove this option if
      you've not installed <xref linkend="libtiff"/>.
    </para>

    <para>
      <command>install -v -m644 base/*.h... </command>: Some packages
      (<application>ImageMagick</application> is one) need the
      <application>Ghostscript</application> interface headers in place to link
      to the shared library. These commands install the headers.
    </para>

    <para>
      <command>ln -sfvn ghostscript /usr/include/ps</command>: Some packages
      expect to find the interface headers in an alternate location.
    </para>

    <para>
        <command>mv -v /usr/share/doc/ghostscript/&gs-version;
        /usr/share/doc/ghostscript-&gs-version;</command>: This moves the
        documentation where it is expected to be found.
    </para>

    <para>
      <option>--disable-cups</option>: this option will save a tiny amount of
      space by not linking <command>gs</command> and <filename>libgs.so</filename>
      to the <xref linkend="cups"/> libraries if you have installed those.
    </para>
  </sect2>

  <sect2 role="content">
    <title>Contents</title>
    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          dvipdf, eps2eps, gs, gsbj, gsc (from soinstall), gsdj,
          gsdj500, gslj, gslp, gsnd, gsx (from soinstall), lprsetup.sh,
          pdf2dsc, pdf2ps, pf2afm, pfbtopfa, pphs, printafm, ps2ascii,
          ps2epsi, ps2pdf, ps2pdf12, ps2pdf13, ps2pdf14, ps2pdfwr,
          ps2ps, ps2ps2, and unix-lpr.sh
          <!-- I don't see bdftops,fixmswrd.pl or pv.sh on my builds [ I don't
          have any bdf tools from xorg ] but they are still referenced in
          base/unixinst.mak -->
        </seg>
        <seg>libgs.so and
             /usr/lib/ghostscript/&gs-version;/X11.so</seg>
        <seg>
          /usr/include/ghostscript,
          /usr/lib/ghostscript,
          /usr/share/ghostscript, and
          /usr/share/doc/ghostscript-&gs-version;
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="gplgs-prog">
        <term><command>gs</command></term>
        <listitem>
          <para>
            is an interpreter for Adobe Systems' PostScript(tm) and Portable
            Document Format (PDF)
          </para>
          <indexterm zone="gs gplgs-prog">
            <primary sortas="b-gs">gs</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libgs.so">
        <term><filename class="libraryfile">libgs.so</filename></term>
        <listitem>
          <para>
            provides <application>Ghostscript</application> functionality to
            other programs, such as <application>GSView</application>,
            <application>ImageMagick</application>, and
            <application>libspectre</application>
          </para>
          <indexterm zone="gs libgs.so">
            <primary sortas="c-libgs.so">libgs.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>
   </variablelist>

   <para>
     <application>Ghostscript</application> provides many different
     scripts used to convert PostScript, PDF, and other formats. Please refer to
     the HTML documentation or the man pages for information about the
     capabilities provided.
    </para>
  </sect2>

</sect1>