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+<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
+"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+
+<node>
+
+ <!--
+ net.hadess.SwitcherooControl:
+ @short_description: D-Bus proxy to access dual-GPU controls.
+
+ After checking the availability of two switchable GPUs in the machine,
+ check the value of net.hadess.SwitcherooControl.HasDualGpu to see
+ if running applications on the discrete GPU should be offered.
+
+ The object path will be "/net/hadess/SwitcherooControl".
+ -->
+ <interface name="net.hadess.SwitcherooControl">
+ <!--
+ HasDualGpu:
+
+ Whether two switchable GPUs are present on the system. This property
+ has been obsoleted in favour of the "NumGPUs" property.
+ -->
+ <property name="HasDualGpu" type="b" access="read"/>
+
+ <!--
+ NumGPUs:
+
+ The number of GPUs available on the system. Note that while having no
+ GPUs is unlikely, consumers of this API should probably not throw errors
+ if that were the case.
+ -->
+ <property name="NumGPUs" type="u" access="read"/>
+
+ <!--
+ GPUs:
+
+ An array of key-pair values representing each GPU. The key named "Name" (s)
+ will contain a user-facing name for the GPU, the "Environment" (as) key will
+ contain an array of even number of strings, each being an environment
+ variable to set to use the GPU, followed by its value, the "Default" (b) key
+ will tag the default (usually integrated) GPU.
+ -->
+ <property name="GPUs" type="aa{sv}" access="read"/>
+
+ </interface>
+</node>