Functionality is provided by a variety of components, each of which can be selected to provide additional features. Drawing can be provided either through Qt and GTK toolkits, with an additional component which is designed to switch between them. Drawing can also be provided through the Simple DirectMedia Layer (originally version 1.x, with 2.x added as of 3.7.0), which can also be utilized for audio playback through a separate sound component (a component for the OpenAL specification has also been added). GPU acceleration support is available through an OpenGL component, as well as other hardware functionally provided by various other components. There are also components for handling other specialized tasks.