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341 lines
12 KiB
XML
341 lines
12 KiB
XML
<part id="running-clutter">
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<partinfo>
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<author>
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<firstname>Emmanuele</firstname>
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<surname>Bassi</surname>
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<affiliation>
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<address>
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<email>ebassi@linux.intel.com</email>
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</address>
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</affiliation>
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</author>
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</partinfo>
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<title>Running Clutter</title>
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<partintro>
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<section id="environment-variables">
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<title>Environment Variables</title>
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<para>
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Clutter automatically checks environment variables during
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its initialization. These environment variables are meant
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as debug tools, overrides for default behaviours or to
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address known hardware issues:
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</para>
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<variablelist>
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<varlistentry>
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<term>CLUTTER_TEXT_DIRECTION</term>
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<listitem>
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<para>Forces the text direction of every Pango layout
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inside Clutter. Valid values are: ltr or rtl</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CLUTTER_SHOW_FPS</term>
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<listitem>
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<para>Prints out the frames per second achieved by Clutter.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CLUTTER_DEFAULT_FPS</term>
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<listitem>
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<para>Sets the default framerate.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CLUTTER_DISABLE_MIPMAPPED_TEXT</term>
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<listitem>
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<para>Disables mipmapping when rendering text.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CLUTTER_FUZZY_PICK</term>
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<listitem>
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<para>Enables "fuzzy picking".</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CLUTTER_DEBUG</term>
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<listitem>
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<para>Enables debugging modes for Clutter; debugging modes are
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used to print debugging messages on the console. Clutter must be
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compiled with the --enable-debug configuration switch for these
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messages to be printed out. Multiple debugging modes can be
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enabled by separating them using a colon (":") or a comma
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(",").</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CLUTTER_PAINT</term>
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<listitem>
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<para>Enables paint debugging modes for Clutter; the modes change
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the way Clutter paints a scene and are useful for debugging the
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behaviour of the paint cycle.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>CLUTTER_ENABLE_DIAGNOSTIC</term>
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<listitem>
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<para>When set to 1, enables diagnostic messages for run-time
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deprecations, similarly to <envvar>G_ENABLE_DIAGNOSTIC</envvar> in
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GLib.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>On the GLX backend there is also:</para>
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<variablelist>
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<varlistentry>
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<term>CLUTTER_VBLANK</term>
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<listitem>
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<para>Selects the sync-to-vblank mode to be used.
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Valid values are: none, dri or glx</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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<section id="command-line">
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<title>Command Line Arguments</title>
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<para>Similarly to the environment variables, Clutter also installs
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command line switches that are parsed during initialization:</para>
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<variablelist>
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<varlistentry>
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<term>--clutter-show-fps</term>
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<listitem><para>Equivalent of CLUTTER_SHOW_FPS. Prints the
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current rendering speed in frames per second.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--clutter-default-fps=FPS</term>
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<listitem><para>Equivalent of CLUTTER_DEFAULT_FPS. Sets the
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default framerate.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--clutter-text-direction=DIRECTION</term>
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<listitem><para>Equivalent of CLUTTER_TEXT_DIRECTION. Sets the
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direction for the text.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--clutter-disable-mipmapped-text</term>
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<listitem><para>Equivalent of CLUTTER_DISABLE_MIPMAPPED_TEXT.
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Disables mipmapping when rendering text.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--clutter-use-fuzzy-picking</term>
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<listitem><para>Equivalent of CLUTTER_FUZZY_PICK. Enables
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"fuzzy" picking.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--clutter-debug=FLAGS</term>
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<listitem><para>Equivalent of CLUTTER_DEBUG. Sets FLAGS as the
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Clutter debugging flags.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--clutter-no-debug=FLAGS</term>
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<listitem><para>Unsets FLAGS from the Clutter debugging
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flags.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--cogl-debug=FLAGS</term>
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<listitem><para>Equivalent of COGL_DEBUG. Sets FLAGS as the
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Cogl debugging flags.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--cogl-no-debug=FLAGS</term>
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<listitem><para>Unsets FLAGS from the Cogl debugging
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flags.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--clutter-enable-accessibility</term>
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<listitem><para>Enables accessibility support.</para></listitem>
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</varlistentry>
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</variablelist>
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<para>The X11 backends also have the following command line
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options:</para>
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<variablelist>
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<varlistentry>
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<term>--display=DISPLAY</term>
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<listitem><para>Sets the X11 display to use.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--screen=SCREEN</term>
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<listitem><para>Sets the X11 screen number to use.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>--synch</term>
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<listitem><para>Make X11 calls synchronous.</para></listitem>
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</varlistentry>
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</variablelist>
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</section>
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<para>The GLX backend also has the following command line option:</para>
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<variablelist>
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<varlistentry>
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<term>--vblank=METHOD</term>
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<listitem><para>Equivalent of CLUTTER_VBLANK. Sets the sync-to-vblank
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method to be used.</para></listitem>
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</varlistentry>
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</variablelist>
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<section id="clutter-Debug-Flags">
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<title>Debug flags for Clutter</title>
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<para>The debugging flags can be used for the CLUTTER_DEBUG environment
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variable and the --clutter-debug command line switch. Multiple flags can
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be separated by a colon (:) or a comma (,).</para>
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<!--
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keep in sync with the list of Clutter debug keys inside clutter-main.c
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-->
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<variablelist>
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<varlistentry>
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<term>actor</term>
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<listitem><para>Generic actor-related notes</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>animation</term>
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<listitem><para>#ClutterAnimation notes</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>backend</term>
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<listitem><para>Backend-related notes, including initialization of
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the backend features and GL context creation</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>event</term>
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<listitem><para>Event handling notes</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>layout</term>
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<listitem><para>#ClutterLayoutManager notes</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>misc</term>
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<listitem><para>Miscellaneous notes</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>scheduler</term>
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<listitem><para>Notes related to timelines and the master
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clock</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>script</term>
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<listitem><para>Notes related to #ClutterScript</para></listitem>
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</varlistentry>
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</variablelist>
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<para>It is possible to get all the debugging notes using the
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special "all" flag.</para>
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</section>
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<section id="configuration-file">
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<title>Configuration File</title>
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<para>Clutter will look for files named <filename>settings.ini</filename>
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located in the <filename>/etc/clutter-1.0</filename> and
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<filename>$XDG_CONFIG_HOME/clutter-1.0</filename> directories. These files
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must be valid key files (see #GKeyFile in the GLib documentation) and may
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have three sections:</para>
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<variablelist>
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<varlistentry>
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<term>Environment</term>
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<listitem><para>The keys in this section map the environment variables
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honoured by Clutter.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>Debug</term>
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<listitem><para>The keys in this section related to the debugging notes
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that Clutter exposes when compiled with debugging support; similarly to
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the environment variables and command line arguments related to the
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debugging notes, Clutter must be compiled with support for these notes
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in order to use them.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>Settings</term>
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<listitem><para>The keys in this section strictly map to the #GObject
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properties exposed by the #ClutterSettings type; if Clutter is running
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on an X11 platform, the XSettings manager will take precedence over the
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values specified in the <filename>settings.ini</filename>
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file.</para></listitem>
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</varlistentry>
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</variablelist>
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<section id="configuration-keys-environment">
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<title>Keys available for the Environment group</title>
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<variablelist>
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<varlistentry>
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<term>ShowFps</term>
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<listitem><para>A boolean value, equivalent to setting
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<code>CLUTTER_SHOW_FPS</code>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DisableMipmappedText</term>
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<listitem><para>A boolean value, equivalent to setting
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<code>CLUTTER_DISABLE_MIPMAPPED_TEXT</code>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>UseFuzzyPicking</term>
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<listitem><para>A boolean value, equivalent to setting
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<code>CLUTTER_FUZZY_PICK</code>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>EnableAccessibility</term>
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<listitem><para>A boolean value, equivalent to setting
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<code>CLUTTER_ENABLE_ACCESSIBILITY</code>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>DefaultFps</term>
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<listitem><para>An integer value, equivalent to setting
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<code>CLUTTER_DEFAULT_FPS</code>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>TextDirection</term>
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<listitem><para>A string value, equivalent to setting
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<code>CLUTTER_TEXT_DIRECTION</code>.</para></listitem>
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</varlistentry>
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</variablelist>
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</section>
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<section id="configuration-keys-debug">
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<title>Keys available for the Debug group</title>
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<variablelist>
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<varlistentry>
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<term>Debug</term>
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<listitem><para>A string containing the debugging flags, in the same
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format that should be used with the <code>CLUTTER_DEBUG</code>
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environment variable.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>PaintDebug</term>
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<listitem><para>A string containing the paint debugging flags, in the same
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format that should be used with the <code>CLUTTER_PAINT</code>
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environment variable.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>PickDebug</term>
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<listitem><para>A string containing the pick debugging flags, in the same
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format that should be used with the <code>CLUTTER_PICK</code>
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environment variable.</para></listitem>
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</varlistentry>
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</variablelist>
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</section>
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</section>
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</partintro>
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</part>
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