docs/bevy/examples/window/transparent_window.rs 1.4 K · 36 lines · raw · history

1 //! Shows how to display a window in transparent mode.
2 //!
3 //! This feature works as expected depending on the platform. Please check the
4 //! [documentation](https://docs.rs/bevy/latest/bevy/prelude/struct.Window.html#structfield.transparent)
5 //! for more details.
6
7 use bevy::prelude::*;
8 #[cfg(any(target_os = "macos", target_os = "linux"))]
9 use bevy::window::CompositeAlphaMode;
10
11 fn main() {
12 App::new()
13 .add_plugins(DefaultPlugins.set(WindowPlugin {
14 primary_window: Some(Window {
15 // Setting `transparent` allows the `ClearColor`'s alpha value to take effect
16 transparent: true,
17 // Disabling window decorations to make it feel more like a widget than a window
18 decorations: false,
19 #[cfg(target_os = "macos")]
20 composite_alpha_mode: CompositeAlphaMode::PostMultiplied,
21 #[cfg(target_os = "linux")]
22 composite_alpha_mode: CompositeAlphaMode::PreMultiplied,
23 ..default()
24 }),
25 ..default()
26 }))
27 // ClearColor must have 0 alpha, otherwise some color will bleed through
28 .insert_resource(ClearColor(Color::NONE))
29 .add_systems(Startup, setup)
30 .run();
31 }
32
33 fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
34 commands.spawn(Camera2d);
35 commands.spawn(Sprite::from_image(asset_server.load("branding/icon.png")));
36 }