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31 lines
1.9 KiB
Markdown
31 lines
1.9 KiB
Markdown
<!-- Copyright © SixtyFPS GmbH <info@slint.dev> ; SPDX-License-Identifier: MIT -->
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# Winit Backend
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The Winit backend uses the [winit](https://docs.rs/winit/latest/winit/) library to interact with the
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windowing system.
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The Winit backend supports practically all relevant operating systems and windowing systems, including
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macOS, Windows, Linux with Wayland and X11.
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The Winit backend supports different renderers. They can be explicitly selected for use through the
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`SLINT_BACKEND` environment variable.
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| Renderer name | Supported/Required Graphics APIs | `SLINT_BACKEND` value to select renderer |
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|---------------|---------------------------------------------|------------------------------------------|
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| FemtoVG | OpenGL | `winit-femtovg` |
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| Skia | OpenGL, Metal, Direct3D, Software-rendering | `winit-skia` |
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| Skia Software | Software-only rendering with Skia | `winit-skia-software` |
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| Skia OpenGL | OpenGL rendering with Skia | `winit-skia-opengl` |
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| software | Software-rendering, no GPU required | `winit-software` |
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If no renderer is explicitly set, the backend will first try to use the Skia renderer, if it was enabled at compile time.
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If that fails, it will fall back to the FemtoVG renderer, and if that also fails, it will use the software renderer.
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## Configuration Options
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The Winit backend reads and interprets the following environment variables:
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| Name | Accepted Values | Description |
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|--------------------|-----------------|--------------------------------------------------------------------|
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| `SLINT_FULLSCREEN` | any value | If this variable is set, every window is shown in fullscreen mode. |
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