cairo-test.rs

extern crate cairo;

use std::fs::File;
use std::error::Error;

fn main() -> Result<(), Box<dyn Error>> {
    let surface = cairo::ImageSurface::create(cairo::Format::ARgb32, 640, 480)?;

    let context = cairo::Context::new(&surface); // Borrows `surface` (immutable!)

    // Use the context to modify the surface
    context.set_source_rgb(1.0, 0.0, 0.0);
    context.new_path();
    context.move_to(100.0, 100.0);
    context.line_to(100.0, 200.0);
    context.stroke();

    context.set_source_rgb(0.8, 0.4, 1.0);
    context.new_path();
    context.move_to(200.0, 100.0);
    context.line_to(200.0, 300.0);
    context.stroke();

    // Export the surface (nb. still borrowed by context)
    let mut file = File::create("foo.png")?;
    surface.write_to_png(&mut file)?;

    Ok(())
}