Need help figuring out how horizontal scrolling work

[antouhou]

Hi! I hope that this message finds someone who can explain to me how horizontal scroll work :)

Here's my code:

use cosmic_text::{FontSystem, Metrics, Buffer, Wrap, Attrs, Family, Shaping, Scroll};

fn main() {
    let mut font_system = FontSystem::new();
    let metrics = Metrics::new(14.0, 20.0);

    let mut buffer = Buffer::new(&mut font_system, metrics);

    let mut buffer = buffer.borrow_with(&mut font_system);
    
    buffer.set_wrap(Wrap::None);
    buffer.set_size(Some(100.0), Some(50.0));

    buffer.set_text(
        "Lorem ipsum dolor sit amet, qui minim labore adipisicing minim sint cillum sint consectetur cupidatat.",
        Attrs::new().family(Family::SansSerif),
        Shaping::Advanced
    );

    let scroll = Scroll::new(0, 15.0, 200.0);
    buffer.set_scroll(scroll);

    // Perform shaping as desired
    buffer.shape_until_scroll(false);

    for run in buffer.layout_runs() {
        println!("Layout run: {:?}", run);
    }
}

However, it doesn't seem like setting horizontal scroll changes anything anywhere. Changing vertical scroll works fine. Is there something I'm missing here? Rendering the buffer to the screen also applies vertical scroll correctly, but does nothing with horizontal one.