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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);
}
}
}
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