Sliced scaling does not play well with Anchor

[Cyborus04]

Bevy version

v0.13.1

What you did

I was upgrading my RPG textboxes to use the new 9-slicing feature, but creating a sliced sprite with an anchor not set to Anchor::Center does not work right.

What went wrong

Creating the textbox background with Anchor::Center works fine, and looks like this:

Created with this code:

let sprite_child = commands
    .spawn(SpriteBundle {
        sprite: Sprite {
            custom_size: Some(vec2(296.5, 83.5)),
            ..default()
        },
        transform: Transform {
            translation: Vec3::new(0.0, -77.75, 4.9),
            rotation: Quat::IDENTITY,
            scale: Vec3::splat(1.0),
        },
        texture: asset_server.load("textbox.png"),
        ..default()
    })
    .insert(ImageScaleMode::Sliced(TextureSlicer {
        border: BorderRect::square(13.0),
        max_corner_scale: 1.0,
        ..default()
    }))
    .id();

Creating the textbox background with Anchor::TopLeft (with position adjusted correspondingly) does not work fine, and looks like this:

Created with this code:

let sprite_child = commands
    .spawn(SpriteBundle {
        sprite: Sprite {
            anchor: Anchor::TopLeft,
            custom_size: Some(vec2(296.5, 83.5)),
            ..default()
        },
        transform: Transform {
            translation: Vec3::new(-148.25, -36.0, 4.9),
            rotation: Quat::IDENTITY,
            scale: Vec3::splat(1.0),
        },
        texture: asset_server.load("textbox.png"),
        ..default()
    })
    .insert(ImageScaleMode::Sliced(TextureSlicer {
        border: BorderRect::square(13.0),
        max_corner_scale: 1.0,
        ..default()
    }))
    .id();

Additional information

My guess is that the anchor is being taken into consideration when scaling the center of the sliced texture, but not for the other parts.

[Cyborus04]

I'll try to get a small reproduction made tomorrow, but right now it is 1:51 AM and I need to sleep...

[james7132]

Looks like the same cause as #12408.