<para>
A list of modules to load. Note that GTK+ also allows to specify modules to load via a commandline option (<option>--gtk-module</option>) and with the <literal>gtk-modules</literal> setting.
</para>
+ <warning>
+ Note that this environment variable is read by GTK+ 2.x too,
+ which may not have the same set of modules available for loading.
+ </warning>
</formalpara>
-<formalpara>
+<formalpara id="gtk-path">
<title><envar>GTK_PATH</envar></title>
<para>
modules, file system backends and print backends. If the path to
the dynamically loaded object is given as an absolute path name,
then GTK+ loads it directly.
- Otherwise, GTK+ goes in turn through the directories in GTK_PATH,
+ Otherwise, GTK+ goes in turn through the directories in <envar>GTK_PATH</envar>,
followed by the directory <filename>.gtk-3.0</filename> in the user's
home directory, followed by the system default directory,
which is <filename><replaceable>libdir</replaceable>/gtk-3.0/modules</filename>.
The components of GTK_PATH are separated by the ':' character on
Linux and Unix, and the ';' character on Windows.
</para>
+ <warning>
+ Note that this environment variable is read by GTK+ 2.x too, which
+ makes it unsuitable for setting it system-wide (or session-wide),
+ since doing so will cause either GTK+ 2.x applications or GTK+ 3
+ applications to see incompatible modules.
+ </warning>
</formalpara>
<formalpara>
<para>
Specifies an IM module to use in preference to the one determined
- from the locale. If this isn't set and you are running on the system
+ from the locale. If this isn't set and you are running on the system
that enables <literal>XSETTINGS</literal> and has a value in
<literal>Gtk/IMModule</literal>, that will be used for the default
IM module.
</para>
</formalpara>
-<formalpara id="im-module-file">
+<formalpara id="gtk-im-module-file">
<title><envar>GTK_IM_MODULE_FILE</envar></title>
<para>
Specifies the file listing the IM modules to load. This environment
- variable overrides the <literal>im_module_file</literal> specified in
- the RC files, which in turn overrides the default value
+ variable the default value
<filename><replaceable>libdir</replaceable>/gtk-3.0/3.0.0/immodules.cache</filename>
(<replaceable>libdir</replaceable> has the same meaning here as explained for <envar>GTK_PATH</envar>).
</para>
-</formalpara>
-
-<formalpara>
- <title><envar>GTK2_RC_FILES</envar></title>
-
<para>
- Specifies a list of RC files to parse instead of the default ones;
- see <link linkend="gtk-Resource-Files">Resource Files</link>.
+ The <filename>immodules.cache</filename> file is generated by the
+ <command>gtk-query-immodules-3.0</command> utility.
</para>
+ <warning>
+ Note that this environment variable is read by GTK+ 2.x too, which
+ makes it unsuitable for setting it system-wide (or session-wide),
+ since doing so will cause either GTK+ 2.x applications or GTK+ 3
+ applications to see the wrong list of IM modules.
+ </warning>
</formalpara>
<formalpara>
<para>
Specifies the file listing the GdkPixbuf loader modules to load.
This environment variable overrides the default value
- <filename><replaceable>libdir</replaceable>/gtk-3.0/3.0.0/loaders.cache</filename>
+ <filename><replaceable>libdir</replaceable>/gtk-3.0/3.0.0/loaders.cache</filename>
(<replaceable>libdir</replaceable> is the sysconfdir specified when
- GTK+ was configured, usually <filename>/usr/local/lib</filename>.)
+ GTK+ was configured, usually <filename>/usr/local/lib</filename>.)
+ </para>
+ <para>
+ The <filename>loaders.cache</filename> file is generated by the
+ <command>gdk-pixbuf-query-loaders</command> utility.
</para>
</formalpara>
</formalpara>
<formalpara>
- <title><envar>GDK_NATIVE_WINDOWS</envar></title>
+ <title><envar>GDK_RENDERING</envar></title>
+
+ <para>
+ If set, selects the way how GDK creates similar surfaces. This affects both the
+ functionality of the function gdk_window_create_similar_surface() as well as the
+ way GDK creates backing surfaces for double buffering. The following values can
+ be used:
+ <variablelist>
+
+ <varlistentry>
+ <term>similar</term>
+ <listitem><para>Create similar surfaces to the window in use. This is the
+ default behavior when the variable is not set.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>image</term>
+ <listitem><para>Always create image surfaces. This essentially turns off
+ all hardware acceleration inside GTK.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>recording</term>
+ <listitem><para>Always create recording surfaces. This causes bare rendering
+ to the backend without the creation of intermediate surfaces (Pixmaps in X)
+ and will likely cause flicker.</para></listitem>
+ </varlistentry>
+
+ </variablelist>
+ All other values will be ignored and fall back to the default behavior. More
+ values might be added in the future.
+ </para>
+</formalpara>
+
+<formalpara>
+ <title><envar>GDK_BACKEND</envar></title>
<para>
- If set, GDK creates all windows as native windows. This can help
- applications that make assumptions about 1-1 correspondence between
- GDK windows and X11 windows.
+ If set, selects the GDK backend to use. Selecting a backend requires that GTK is compiled
+ with support for that backend. The following backends can be selected:
+ <variablelist>
+
+ <varlistentry>
+ <term>quartz</term>
+ <listitem><para>Selects the native Quartz backend</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>win32</term>
+ <listitem><para>Selects the native backend for Microsoft Windows</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>x11</term>
+ <listitem><para>Selects the native backend for connecting to X11 servers.</para></listitem>
+ </varlistentry>
+
+ </variablelist>
+ For more information about selecting backends, see the gdk_display_manager_get() function.
+ </para>
+</formalpara>
+
+<formalpara>
+ <title><envar>GDK_SYNCHRONIZE</envar></title>
+
+ <para>
+ If set, GDK makes all X requests synchronously. This is a useful
+ option for debugging, but it will slow down the performance considerably.
</para>
</formalpara>
</para>
</formalpara>
+<formalpara>
+ <title><envar>DESKTOP_STARTUP_ID</envar></title>
+
+ <para>
+ GTK+ uses this environment variable to provide startup notification
+ according to the <ulink url="http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt">Startup Notification Spec</ulink>.
+ Following the specification, GTK+ unsets this variable after reading
+ it (to keep it from leaking to child processes). So, if you need its
+ value for your own purposes, you have to read it before calling
+ gtk_init().
+ </para>
+</formalpara>
+
</refsect2>
</refsect1>
projects / ~andy / gtk / blobdiff