librsvg source for verification 2026-05-22

examples/proportional.rs

@@ -0,0 +1,62 @@
+use cairo;
+use rsvg;
+
+use std::fs::File;
+use std::io::BufWriter;
+use std::process;
+
+fn main() {
+    let args = std::env::args_os();
+
+    if args.len() != 5 {
+        eprintln!("usage: render <input.svg> <width> <height> <output.png>");
+        process::exit(1);
+    }
+
+    let mut args = args.skip(1);
+
+    let input = args.next().unwrap();
+    let width_os = args.next().unwrap();
+    let height_os = args.next().unwrap();
+    let output = args.next().unwrap();
+
+    let width_s = width_os.to_str().unwrap();
+    let height_s = height_os.to_str().unwrap();
+
+    let width: i32 = width_s.parse().unwrap();
+    let height: i32 = height_s.parse().unwrap();
+
+    assert!(width > 0 && height > 0);
+
+    let handle = match rsvg::Loader::new().read_path(input) {
+        Ok(handle) => handle,
+
+        Err(e) => {
+            eprintln!("loading error: {}", e);
+            process::exit(1);
+        }
+    };
+
+    let renderer = rsvg::CairoRenderer::new(&handle);
+
+    let surface = cairo::ImageSurface::create(cairo::Format::ARgb32, width, height).unwrap();
+    let cr = cairo::Context::new(&surface).expect("Failed to create a cairo context");
+
+    let res = renderer.render_document(
+        &cr,
+        &cairo::Rectangle::new(0.0, 0.0, f64::from(width), f64::from(height)),
+    );
+
+    match res {
+        Ok(()) => {
+            let mut file = BufWriter::new(File::create(output).unwrap());
+
+            surface.write_to_png(&mut file).unwrap();
+        }
+
+        Err(e) => {
+            eprintln!("rendering error: {}", e);
+            process::exit(1);
+        }
+    }
+}