GhostEngine/Ghost.Editor/View/Pages/EngineEditor/ScenePage.xaml.cs

using Ghost.Editor.Controls.Internal;
using Ghost.Graphics;
using Ghost.Graphics.Contracts;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using WinRT;

namespace Ghost.Editor.View.Pages.EngineEditor;

internal sealed partial class ScenePage : NavigationTabPage
{
    private Renderer? _renderView;
    private ISwapChainPanelNative _swapChainPanelNative;

    public ScenePage()
    {
        InitializeComponent();

        SwapChainPanel.Loaded += SwapChainPanel_Loaded;
        SwapChainPanel.Unloaded += SwapChainPanel_Unloaded;
        SwapChainPanel.SizeChanged += SwapChainPanel_SizeChanged;
    }

    private void SwapChainPanel_Loaded(object sender, RoutedEventArgs e)
    {
        var guid = typeof(ISwapChainPanelNative.Interface).GUID;
        ((IWinRTObject)SwapChainPanel).NativeObject.TryAs(guid, out var swapChainPanelNativeHandle);
        _swapChainPanelNative = new ISwapChainPanelNative(swapChainPanelNativeHandle);

        _renderView = GraphicsPipeline.GraphicsDevice.CreateRenderer(new(_swapChainPanelNative, (uint)SwapChainPanel.ActualWidth, (uint)SwapChainPanel.ActualHeight));
    }

    private void SwapChainPanel_Unloaded(object sender, RoutedEventArgs e)
    {
        _swapChainPanelNative.Dispose();
        _renderView?.Dispose();
    }

    private void SwapChainPanel_SizeChanged(object sender, SizeChangedEventArgs e)
    {
        if (e.NewSize.Width > 8.0 && e.NewSize.Height > 8.0)
        {
            _renderView?.RequestResize((uint)e.NewSize.Width, (uint)e.NewSize.Height);
        }
    }
}