Function scene_will_connect

native/ios/src/lib.rs:242–424

(
    _this: *mut c_void,
    _sel: Sel,
    scene: *const AnyObject,
    _session: *const AnyObject,
    _options: *const AnyObject,
)

// ============================================================

unsafe extern "C" fn scene_will_connect(
    _this: *mut c_void,
    _sel: Sel,
    scene: *const AnyObject,
    _session: *const AnyObject,
    _options: *const AnyObject,
) {
    if scene.is_null() { return; }

    // Get screen bounds from UIScreen.mainScreen (simpler than scene.screen)
    let screen_cls = AnyClass::get(c"UIScreen").unwrap();
    let screen: Retained<AnyObject> = msg_send![screen_cls, mainScreen];
    let bounds: CGRect = msg_send![&*screen, bounds];
    let scale: f64 = msg_send![&*screen, scale];

    let pixel_width = (bounds.size.width * scale) as u32;
    let pixel_height = (bounds.size.height * scale) as u32;

    // Create UIWindow attached to the scene
    let window_cls = AnyClass::get(c"UIWindow").unwrap();
    let window: Allocated<AnyObject> = msg_send![window_cls, alloc];
    let window: Retained<AnyObject> = msg_send![window, initWithWindowScene: scene];

    // Create BloomViewController (with orientation lock support)
    let vc_cls = AnyClass::get(c"BloomViewController")
        .unwrap_or_else(|| AnyClass::get(c"UIViewController").unwrap());
    let vc: Allocated<AnyObject> = msg_send![vc_cls, alloc];
    let vc: Retained<AnyObject> = msg_send![vc, init];

    // Create BloomMetalView
    let view_cls = AnyClass::get(c"BloomMetalView").unwrap();
    let view: Allocated<AnyObject> = msg_send![view_cls, alloc];
    let view: Retained<AnyObject> = msg_send![view, initWithFrame: bounds];

    // Set background to green (diagnostic — visible if Metal isn't rendering)
    let color_cls = AnyClass::get(c"UIColor").unwrap();
    let green: Retained<AnyObject> = msg_send![color_cls, greenColor];
    let _: () = msg_send![&*view, setBackgroundColor: &*green];

    // Configure CAMetalLayer
    let layer: Retained<AnyObject> = msg_send![&*view, layer];
    let drawable_size = CGSize { width: pixel_width as f64, height: pixel_height as f64 };
    let _: () = msg_send![&*layer, setDrawableSize: drawable_size];
    let _: () = msg_send![&*layer, setContentsScale: scale];
    let _: () = msg_send![&*layer, setOpaque: Bool::NO];  // Non-opaque so green shows if Metal fails

    // Enable touches
    let _: () = msg_send![&*view, setUserInteractionEnabled: Bool::YES];
    let _: () = msg_send![&*view, setMultipleTouchEnabled: Bool::YES];

    // Set up window hierarchy
    let _: () = msg_send![&*vc, setView: &*view];
    let _: () = msg_send![&*window, setRootViewController: &*vc];
    let _: () = msg_send![&*window, makeKeyAndVisible];

    // Store references
    UI_VIEW = Some(view.clone());
    UI_WINDOW = Some(window);