ickshonpe/bevy_ui_exact_image

bevy_ui_exact_image

• Force the Bevy UI to draw images in whatever sizes you want.
• Preserve the aspect ratio of images, regardless of the UI layout.
• Full support for texture atlas images.
• Image rotation.

Usage

Add the dependency to your bevy project:

cargo add bevy_ui_exact_image

Then to draw a sized image within a Bevy UI node:

use bevy::prelude::*;
use bevy_ui_exact_image::prelude::*;

fn spawn_example(mut commands: Commands, assets: Res<AssetServer>) {
    commands.spawn(Camera2dBundle::default());
    commands.spawn((ExactImageBundle {
        image: ExactImage {
            texture: assets.load("orientation.png"),
            // exact images have their own color, independent from the background color.
            color: Color::WHITE,
            // force the UI to display the texture at 300 x 200 size
            size: ExactSize::Exactly(Vec2::new(300., 200.)),
            // align the image to the bottom edge of the node, in the center.
            alignment: ImageAlignment::BottomCenter,
            // use Some(rads) to set rotation
            rotation: None,
        },
        style: Style {
            size: Size::new(Val::Px(400.0), Val::Px(400.0)),
            ..Default::default()
        },
        /// give the containing node a red color
        background_color: BackgroundColor(Color::RED),
        ..Default::default()
    },));
}

fn main() {
    App::new()
        .add_plugins(DefaultPlugins.set(ImagePlugin::default_nearest()))
        .add_plugin(ExactImagePlugin)
        .add_startup_system(spawn_example)
        .run();
}

Result:

Examples

cargo --run --example minimal
cargo --run --example rotation
cargo --run --example size
cargo --run --example alignment

Limitations

• No image flipping. Not possible (or at least not trivial) with a third party implementation atm in Bevy 0.9.

Notes

• Probably quite a few bugs, I haven't done much testing.

• Name stolen from inodentry's related Bevy issue #7439

  bevyengine/bevy#7349