<refentry id="gtk-directfb">
<refmeta>
<refentrytitle>Using GTK+ on DirectFB</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>GTK Library</refmiscinfo>
</refmeta>

<refnamediv>
<refname>Using GTK+ on DirectFB</refname>
<refpurpose>
DirectFB-specific aspects of using GTK+
</refpurpose>
</refnamediv>

<refsect1>
<title>Using GTK+ on DirectFB</title>

<para>
The DirectFB port of GTK+ is an implementation of GDK (and therefore GTK+) 
on top of the <ulink url="http://www.directfb.org">DirectFB</ulink> 
libraries.
</para>

<para>
Like the obsolete linux-fb port of GTK+, it runs on the Linux framebuffer,
but the DirectFB libraries provide additional features like hardware graphics 
acceleration, input device handling and abstraction and an integrated windowing 
system.
</para>

<refsect2><title>Build requirements</title>

<para>
Beyond the usual GTK+ build requirements, the DirectFB backend (obviously) needs 
the DirectFB libraries (at least 0.9.21) and Cairo compiled with DirectFB support.
</para>

</refsect2>

<!--
  FIXME: it seems most of the options listed in _gdk_windowing_args
  are ignored, and they need to be described by somebody who knows 
  what they are supposed to do...

<refsect2><title>DirectFB-specific commandline options</title>

<para>
The DirectFB GDB backend can be influenced with some additional 
command line arguments.
</para>

<formalpara>
  <title><systemitem>dfb-help</systemitem></title>
  <para>
    Display help for DirectFB-specific commandline options.
  </para>
</formalpara>

<formalpara>
  <title><systemitem>dfb=<replaceable>value</replaceable></systemitem></title>
  <para>
    Possible values: sdl, system. 
  </para>
</formalpara>

<formalpara>
  <title><systemitem>disable-aa-fonts=<replaceable>number</replaceable></systemitem></title>
  <para>
    If <replaceable>number</replaceable> is 1, disable antialising for fonts.
  </para>
</formalpara>

<formalpara>
  <title><systemitem>argb-font=<replaceable>number</replaceable></systemitem></title>
  <para>
    If <replaceable>number</replaceable> is 1, enable ARGB fonts.
  </para>
</formalpara>

<formalpara>
  <title><systemitem>transparent-unfocused=<replaceable>number</replaceable></systemitem></title>
  <para>
    If <replaceable>number</replaceable> is 1, make unfocused windows transparent.
  </para>
</formalpara>

<formalpara>
  <title><systemitem>glyph-surface-cache=<replaceable>number</replaceable></systemitem></title>
  <para>
    Set the size of the glyph surface cache. The default value is 8.
  </para>
</formalpara>

<formalpara>
  <title><systemitem>enable-color-keyring=<replaceable>number</replaceable></systemitem></title>
  <para>
    If <replaceable>number</replaceable> is 1, turn on the color keyring.
  </para>
</formalpara>

-->

</refsect1>

</refentry>
