Drawing

We now have a working window; it'd be nice to draw into it. First, we need to get the window's canvas before starting the main loop:

    let mut canvas = window.into_canvas()
                       .target_texture()
                       .present_vsync()
                       .build()
                       .expect("Couldn't get window's canvas");

A few explanations for the preceding code:

• into_canvas transforms the window into a canvas so that we can manipulate it more easily
• target_texture activates texture rendering support
• present_vsync enables the v-sync (also known as vertical-synchronization) limit
• build creates the canvas by applying all previously set parameters

Then we'll create a texture that we'll paste onto the window's canvas. First, let's get the texture creator, but before that, add this include...