Implement menubar items for common window sizes.

src/Ryujinx/Assets/Locales/en_US.json

@@ -30,6 +30,10 @@
   "MenuBarToolsManageFileTypes": "Manage file types",
   "MenuBarToolsInstallFileTypes": "Install file types",
   "MenuBarToolsUninstallFileTypes": "Uninstall file types",
+  "MenuBarView": "_View",
+  "MenuBarViewWindow": "Window Size",
+  "MenuBarViewWindow720": "720p",
+  "MenuBarViewWindow1080": "1080p",
   "MenuBarHelp": "_Help",
   "MenuBarHelpCheckForUpdates": "Check for Updates",
   "MenuBarHelpAbout": "About",

src/Ryujinx/UI/Views/Main/MainMenuBarView.axaml

@@ -186,6 +186,12 @@
                     <MenuItem Header="{locale:Locale MenuBarToolsUninstallFileTypes}" Click="UninstallFileTypes_Click"/>
                 </MenuItem>
             </MenuItem>
+            <MenuItem VerticalAlignment="Center" Header="{locale:Locale MenuBarView}">
+                <MenuItem VerticalAlignment="Center" Header="{locale:Locale MenuBarViewWindow}">
+                    <MenuItem Header="{locale:Locale MenuBarViewWindow720}" Tag="720" Click="ChangeWindowSize_Click" />
+                    <MenuItem Header="{locale:Locale MenuBarViewWindow1080}" Tag="1080" Click="ChangeWindowSize_Click" />
+                </MenuItem>
+            </MenuItem>
             <MenuItem VerticalAlignment="Center" Header="{locale:Locale MenuBarHelp}">
                 <MenuItem
                     Name="UpdateMenuItem"

src/Ryujinx/UI/Views/Main/MainMenuBarView.axaml.cs

@@ -1,6 +1,7 @@
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
+using Avalonia.Threading;
 using LibHac.Ncm;
 using LibHac.Tools.FsSystem.NcaUtils;
 using Ryujinx.Ava.Common.Locale;
@@ -211,6 +212,37 @@ namespace Ryujinx.Ava.UI.Views.Main
             }
         }
 
+        private async void ChangeWindowSize_Click(object sender, RoutedEventArgs e)
+        {
+            if (sender is MenuItem item)
+            {
+                int height;
+                int width;
+
+                switch (item.Tag)
+                {
+                    case "720":
+                        height = 720;
+                        width = 1280;
+                        break;
+
+                    case "1080":
+                        height = 1080;
+                        width = 1920;
+                        break;
+                    
+                    default:
+                        throw new ArgumentNullException(nameof(item.Tag));
+                }
+
+                await Dispatcher.UIThread.InvokeAsync(() =>
+                {
+                    ViewModel.WindowHeight = height + Window.StatusBarHeight + Window.MenuBarHeight;
+                    ViewModel.WindowWidth = width;
+                });
+            }
+        }
+
         public async void CheckForUpdates(object sender, RoutedEventArgs e)
         {
             if (Updater.CanUpdate(true))

src/Ryujinx/UI/Windows/MainWindow.axaml.cs

@@ -67,11 +67,11 @@ namespace Ryujinx.Ava.UI.Windows
 
             DataContext = ViewModel;
 
-            SetWindowSizePosition();
-
             InitializeComponent();
             Load();
 
+            SetWindowSizePosition();
+
             UiHandler = new AvaHostUIHandler(this);
 
             ViewModel.Title = $"Ryujinx {Program.Version}";
@@ -324,17 +324,13 @@ namespace Ryujinx.Ava.UI.Windows
 
         private void SetWindowSizePosition()
         {
-            // WindowStartupLocation is unable to be used after the MainWindow is created.
-            // To center a window manually we need the raw display dimensions.
-            PixelPoint windowCenter = new(Screens.Primary.Bounds.Width / 4, Screens.Primary.Bounds.Height / 4);
-
             if (!ConfigurationState.Instance.RememberWindowState)
             {
                 ViewModel.WindowHeight = 777 * Program.WindowScaleFactor;
                 ViewModel.WindowWidth = 1280 * Program.WindowScaleFactor;
-                WindowState = WindowState.Normal;
                 
-                Position = windowCenter;
+                WindowState = WindowState.Normal;
+                WindowStartupLocation = WindowStartupLocation.CenterScreen;
 
                 return;
             }
@@ -353,7 +349,7 @@ namespace Ryujinx.Ava.UI.Windows
             }
             else
             {
-                Position = windowCenter;
+                WindowStartupLocation = WindowStartupLocation.CenterScreen;
             }
         }