Rust SDL:如何将曲面“附加”到窗口？

extern crate sdl2;

use sdl2::pixels::Color;
use sdl2::rect::Rect;
use sdl2::render::Canvas;
use sdl2::video::Window;
use sdl2::EventPump;

let sdl_context = sdl2::init().unwrap();
let video_subsystem = sdl_context.video().unwrap();

let window = video_subsystem.window("SDL Window", 800, 600)
    .position_centered()
    .build()
    .unwrap();

let mut canvas = window.into_canvas().build().unwrap();

let image = sdl2::image::load("path_to_image.png").unwrap();
let texture_creator = canvas.texture_creator();
let texture = texture_creator.create_texture_from_surface(&image).unwrap();

canvas.clear();
canvas.copy(&texture, None, Rect::new(0, 0, 800, 600)).unwrap();
canvas.present();