pdf to image example

bong/src/main.rs

@@ -2,8 +2,9 @@ use std::fs::File;
 
 use anyhow::{anyhow, Context, Error};
 use bingus::{
-    doc::printpdf::{FontId, Op, PdfDocument, TextItem},
-    Bendable,
+    doc::printpdf::PdfDocument,
+    img::{Dimensions, GrayImage, RgbImage},
+    Bendable, Bytes,
 };
 use clap::Parser;
 use cli::Cli;
@@ -12,15 +13,22 @@ mod cli;
 
 fn main() -> Result<(), Error> {
     let args = Cli::parse();
-    File::open(args.input_file)
+    let bytes = File::open(args.input_file)
         .context("opening file")?
         .bend_into::<PdfDocument>((), Default::default())
         .map_err(|e| anyhow!("parsing PDF: {e}"))?
-        .map(|t| Op::WriteText {
-            items: vec![TextItem::Text(String::from("h"))],
-            font: FontId::new(),
-        })
-        .bend_into::<File>(Box::new(args.output_file), Default::default())
+        .bend_into::<Bytes>((), Default::default())?;
+    let dimensions = {
+        let c = bytes.len().isqrt().try_into().context("image too big")?;
+        Dimensions {
+            width: c,
+            height: c,
+        }
+    };
+    bytes
+        .bend_into::<GrayImage>(dimensions, Default::default())
+        .context("bending into an image")?
+        .save(args.output_file)
         .context("saving output file")?;
 
     Ok(())