source: pst/printing/gs.xml@ 5fcebb8

<?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        "92aa46e75c4f32eb11d9c975053d876c">
  <!ENTITY gs-size          "64 MB">
  <!ENTITY gs-buildsize     "360 MB (with fonts and libgs.so)">
  <!ENTITY gs-time          "2.5 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>
    <!-- devs: do not comment out the bridgehead, unless you comment
         out all the additional downloads (including font files)
         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>
      Fix a build failure due to a typo in a source file:
    </para>

<screen><userinput remap="pre">sed -i 's/gscms_transformm_color_const/gscms_transform_color_const/' base/gsicc_lcms2.c</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>