create poppler-rs

poppler-rs/.gitignore

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+/target

poppler-rs/Cargo.toml

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+[package]
+edition = "2021"
+name = "poppler-rs"
+version = "0.1.0"
+
+[dependencies]
+cairo-rs = {version = "0.20.1"}
+clap = {version = "4.5.16", features = ["derive", "env"]}
+image = "0.25.2"
+poppler-rs = "0.24.1"
+url = "2.5.2"

poppler-rs/src/main.rs

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+use cairo::{Context, Format, ImageSurface};
+use clap::Parser;
+use image::codecs::webp::WebPEncoder;
+use image::ExtendedColorType;
+use poppler::Document;
+use std::fs;
+use std::fs::File;
+use url::Url;
+
+#[derive(Parser, Debug)]
+#[command(version)]
+struct Args {
+    #[arg(short, long, env, default_value = "target/note/note.pdf", value_parser = canonicalize)]
+    input: String,
+
+    #[arg(short, long, env, default_value = "target/output")]
+    output: String,
+}
+
+fn canonicalize(arg: &str) -> Result<String, std::io::Error> {
+    let path = fs::canonicalize(arg)?.to_string_lossy().into_owned();
+    Ok(path)
+}
+
+fn main() {
+    let args = Args::parse();
+    let input = args.input;
+    let output = args.output;
+    let input_uri = Url::parse(format!("file://{input}").as_str())
+        .unwrap()
+        .to_string();
+
+    let document = Document::from_file(&input_uri, None).unwrap();
+
+    for i in 0..document.n_pages() {
+        let page = document.page(i).unwrap();
+        let (width, height) = page.size();
+        let output_file = File::create(format!("{output}-{i}.webp")).unwrap();
+        let surface = ImageSurface::create(Format::Rgb24, width as i32, height as i32).unwrap();
+        let context = Context::new(&surface).unwrap();
+
+        context.set_source_rgb(1., 1., 1.);
+        context.paint().unwrap();
+        page.render(&context);
+
+        drop(context);
+
+        let data = surface.take_data().unwrap();
+        let encoder = WebPEncoder::new_lossless(output_file);
+
+        encoder
+            .encode(&data, width as u32, height as u32, ExtendedColorType::Rgba8)
+            .unwrap();
+    }
+}