Scene viewport auto resize

Author: Moneyl

Nanoforge/Gui/ViewModels/Documents/MapEditorDocumentViewModel.cs

@@ -114,7 +114,7 @@ private void LoadMap(TaskDialog taskDialog)
             //TODO: Count object class instances
             //TODO: Initialize inspectors if necessary in this port. In the previous version it caused a hitch when loading xml files. May not be necessary in avalonia with async.
 
-            Scene.Init(new Vector2(1920, 1080));
+            Scene.Init(renderer.Context);
             Scene.Camera!.TargetPosition = new Vector3(65.97262f, 296.2423f, -592.8933f);
             renderer.ActiveScenes.Add(Scene);
             ImportAndLoadTime = DateTime.Now - loadingStart;

Nanoforge/Gui/ViewModels/Documents/RendererTestDocumentViewModel.cs

@@ -84,7 +84,7 @@ public void SceneInit(TaskDialogViewModel status)
         _skybox.Position = Vector3.Zero;
         _skybox.Scale = new Vector3(25000.0f);
 
-        Scene.Init(new Vector2(1920, 1080));
+        Scene.Init(renderer.Context);
         renderer.ActiveScenes.Add(Scene);
         SceneInitialized = true;
 

Nanoforge/Gui/Views/Controls/Viewport3D.axaml

@@ -11,8 +11,9 @@
                 Loaded="Control_OnLoaded" PointerMoved="InputElement_OnPointerMoved" PointerPressed="InputElement_OnPointerPressed" PointerReleased="InputElement_OnPointerReleased"
                 PointerEntered="InputElement_OnPointerEntered" PointerExited="InputElement_OnPointerExited">
 
-    <Panel>
-        <Image Name="ViewportImage" IsVisible="{Binding #Viewport.SceneInitialized}"/>
+    <Panel VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
+        <Image Name="ViewportImage" IsVisible="{Binding #Viewport.SceneInitialized}" SizeChanged="ViewportImage_OnSizeChanged"
+               HorizontalAlignment="Stretch" VerticalAlignment="Stretch" StretchDirection="Both" Stretch="UniformToFill"/>
         <TextBlock IsVisible="{Binding !#Viewport.SceneInitialized}" 
                    Text="{Binding #Viewport.LoadingStatus}" FontSize="32" FontWeight="Bold" VerticalAlignment="Center" HorizontalAlignment="Center"/>
     </Panel>

Nanoforge/Gui/Views/Controls/Viewport3D.axaml.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Numerics;
 using System.Threading.Tasks;
 using System.Windows.Input;
@@ -10,7 +11,6 @@
 using Avalonia.Platform;
 using Avalonia.Rendering.Composition;
 using Avalonia.Threading;
-using CommunityToolkit.Mvvm.Input;
 using Nanoforge.FileSystem;
 using Nanoforge.Render;
 using Serilog;
@@ -66,8 +66,6 @@ public string LoadingStatus
     private Vector2 _mousePositionDelta = Vector2.Zero;
     private bool _mouseOverViewport = false;
     private bool _mouseMovedThisFrame = false;
-    private bool _sceneInitStarted = false;
-    private Task? _sceneInitTask;
 
     public Viewport3D()
     {
@@ -79,8 +77,8 @@ public Viewport3D()
         }
 
         _renderer = (Application.Current as App)!.Renderer;
-        _rendererOutput = new WriteableBitmap(new PixelSize(1920, 1080), new Vector(96, 96), PixelFormat.Bgra8888);
-
+        CreateRendererOutputTexture((int)ViewportImage.Width, (int)ViewportImage.Height);
+        
         if (_renderer != null)
         {
             var mainWindow = MainWindow.Instance;
@@ -95,7 +93,16 @@ public Viewport3D()
             Log.Error("Renderer is null. If you're not in the xaml designer and you see this then there's a big problem.");
         }
     }
-    
+
+    [MemberNotNull(nameof(_rendererOutput))]
+    private void CreateRendererOutputTexture(int width, int height)
+    {
+        width = Math.Max(1, width);
+        height = Math.Max(1, height);
+        _rendererOutput = new WriteableBitmap(new PixelSize(width, height), new Vector(96, 96), PixelFormat.Bgra8888);
+        ViewportImage.Source = _rendererOutput;
+    }
+
     private void Control_OnLoaded(object? sender, RoutedEventArgs e)
     {
         Update();
@@ -144,7 +151,7 @@ private void RenderFrame()
         _renderer.RenderFrame(Scene!);
 
         using var buffer = _rendererOutput!.Lock();
-        _renderer.GetRenderImage(buffer.Address);
+        Scene!.GetRenderImage(buffer.Address);
 
         _lastUpdate = DateTime.Now;
     }
@@ -181,4 +188,10 @@ private void InputElement_OnPointerExited(object? sender, PointerEventArgs e)
     {
         _mouseOverViewport = false;
     }
+
+    private void ViewportImage_OnSizeChanged(object? sender, SizeChangedEventArgs e)
+    {
+        CreateRendererOutputTexture((int)e.NewSize.Width, (int)e.NewSize.Height);
+        Scene?.ViewportResize(new Vector2((float)e.NewSize.Width, (float)e.NewSize.Height));
+    }
 }

Nanoforge/Render/RenderContext.cs

@@ -34,6 +34,8 @@ public unsafe class RenderContext : IDisposable
 #else
     public const bool EnableValidationLayers = false;
 #endif
+
+    public RenderPass PrimaryRenderPass;
 
     private readonly string[] _validationLayers = new[]
     {