pybevy 0.2.1

PyBevy: A Python Real-Time Engine Built on Bevy
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"""Shows how to display a window in transparent mode.

This feature works as expected depending on the platform. Please check the Bevy
documentation for more details on platform-specific behavior.

Note: PyBevy currently doesn't expose CompositeAlphaMode, so platform-specific
alpha compositing settings from the Rust version are not included.
"""

from pybevy.prelude import *


def setup(commands: Commands, asset_server: Res[AssetServer]) -> None:
    """Set up a camera and sprite."""
    commands.spawn(Camera2d())
    commands.spawn(Sprite.from_image(asset_server.load_image("icon.png")))


@entrypoint
def main(app: App) -> App:
    """Configure and return the app with a transparent window."""
    # Create a transparent window without decorations
    window = Window(
        transparent=True,  # Allow ClearColor's alpha to take effect
        decorations=False,  # Remove window decorations for widget-like appearance
    )

    return (
        app.add_plugins(DefaultPlugins().set(WindowPlugin(primary_window=window)))
        # ClearColor must have 0 alpha, otherwise some color will bleed through
        .insert_resource(ClearColor(Color.NONE))
        .add_systems(Startup, setup)
    )


if __name__ == "__main__":
    main().run()