PDF page rendering benchmark

use pdfluent::{ImageFormat, PdfDocument, ToImagesOptions};

let doc = PdfDocument::open("document.pdf")?;

// The page number goes in as `{page}`. Without that marker `to_images`
// appends `_N` before the extension instead, so a pattern is never wrong
// in a way the compiler can see.
//
// ToImagesOptions is #[non_exhaustive]: it takes the builder, not a struct
// literal, so that a new option is not a breaking change.
let report = doc.to_images(
    "page_{page}.png",
    ToImagesOptions::new()
        .with_dpi(150)
        .with_format(ImageFormat::Png),
)?;
println!("{} pages rendered", report.paths.len());