Function render_page_reporting_with 

pub async fn render_page_reporting_with<S: AsyncObjectSource>(
    src: S,
    page: &Page,
    scale: f32,
    opts: &RenderOptions,
) -> Result<(Pixmap, RenderReport)>

Renders a page like render_page_reporting against any object source, awaiting whatever I/O the source needs — this is the asynchronous entry point, and the synchronous ones above are this implementation over pdfboss_core::Immediate, so the two APIs cannot render differently.

The source is taken by value and the page by reference, which is the combination a consumer needs to spawn the result: the future is Send over a source that is Send + Sync, and 'static as long as the borrow of page is created inside the consumer’s own async move block, which owns the page. See pdfboss_core::source’s “Signing a shared algorithm”.