2021-04-06
There are two basic issues when you output a Unity game to Xbox as a UWP application. The first one is the visible white edges (tv overscan) and the second one is the mouse pointer.
Most of the official docs describes solutions for C# XAML but Unity only supports IL2CPP for UWP builds.
To address this change, you need to edit app.xaml.cpp
instead.
App::App()
{
InitializeComponent();
Application::Current->RequiresPointerMode = ApplicationRequiresPointerMode::WhenRequested; // mouse mode off
//
void App::InitializeUnity(String^ args)
{
ApplicationView::GetForCurrentView()->SuppressSystemOverlays = true;
ApplicationView::GetForCurrentView()->SetDesiredBoundsMode(ApplicationViewBoundsMode::UseCoreWindow); // overscan fix