Method new

sdl/src/host.rs:263–335

Initializes a new SDL console. The console is sized to `resolution` pixels and the font is set to `font`. There can only be one active `SdlConsole` at any given time given that this initializes and owns the SDL context.

(resolution: Resolution, font: &'static Font)

    /// There can only be one active `SdlConsole` at any given time given that this initializes and
    /// owns the SDL context.
    fn new(resolution: Resolution, font: &'static Font) -> io::Result<Self> {
        let sdl = sdl2::init().map_err(string_error_to_io_error)?;
        let event_pump = sdl.event_pump().map_err(string_error_to_io_error)?;
        let video = sdl.video().map_err(string_error_to_io_error)?;

        video.text_input().start();

        let mut title = format!("EndBASIC {}", env!("CARGO_PKG_VERSION"));
        let mut window = match resolution {
            Resolution::FullScreenDesktop => {
                let mut window = video.window(&title, 0, 0);
                window.fullscreen_desktop();
                window
            }
            Resolution::FullScreen(size) => {
                let mut window = video.window(&title, size.0.get(), size.1.get());
                window.fullscreen();
                window
            }
            Resolution::Windowed(size) => {
                let mut window = video.window(&title, size.0.get(), size.1.get());
                window.position_centered();
                window
            }
        }
        .build()
        .map_err(window_build_error_to_io_error)?;

        // macOS causes graphical apps started from the terminal to go into the background
        // (the end of the Command+Tab switcher), which is confusing and unexpected.  We have
        // to force the app to raise to the front.
        #[cfg(target_os = "macos")]
        activate_app();
        window.raise();

        let size_pixels = requested_size_pixels(resolution).unwrap_or_else(|| {
            let (width, height) = window.size();
            SizeInPixels::new(width.clamped_into(), height.clamped_into())
        });
        let size_chars = font.chars_in_area(size_pixels);

        write!(
            &mut title,
            " - {}x{} pixels, {}x{} chars",
            size_pixels.width, size_pixels.height, size_chars.x, size_chars.y
        )
        .map_err(fmt_error_to_io_error)?;
        window.set_title(&title).expect("There should have been no NULLs in the formatted title");

        let pixel_format = window.window_pixel_format();
        let surface =
            Surface::new(u32::from(size_pixels.width), u32::from(size_pixels.height), pixel_format)
                .map_err(string_error_to_io_error)?;
        let mut canvas = surface.into_canvas().map_err(string_error_to_io_error)?;
        let texture_creator = canvas.texture_creator();

        let draw_color = RGB::default();
        canvas.set_draw_color(rgb_to_color(draw_color));