# Winit Backend The Winit backend uses the [winit](https://docs.rs/winit/latest/winit/) library to interact with the windowing system. The Winit backend supports practically all relevant operating systems and windowing systems, including macOS, Windows, Linux with Wayland and X11. The Winit backend supports different renderers. They can be explicitly selected for use through the `SLINT_BACKEND` environment variable. | Renderer name | Supported/Required Graphics APIs | `SLINT_BACKEND` value to select renderer | |---------------|---------------------------------------------|------------------------------------------| | FemtoVG | OpenGL | `winit-femtovg` | | Skia | OpenGL, Metal, Direct3D, Software-rendering | `winit-skia` | | Skia Software | Software-only rendering with Skia | `winit-skia-software` | | software | Software-rendering, no GPU required | `winit-software` | ## Configuration Options The Winit backend reads and interprets the following environment variables: | Name | Accepted Values | Description | |--------------------|-----------------|--------------------------------------------------------------------| | `SLINT_FULLSCREEN` | any value | If this variable is set, every window is shown in fullscreen mode. |