WinFormBitmapRenderSurfaceControl.cs

using Gondwana.Rendering;
using Gondwana.Rendering.Backbuffers;
using SkiaSharp.Views.Desktop;
 
namespace Gondwana.WinForms.Rendering;

public partial class WinFormBitmapRenderSurfaceControl : UserControl
{
    private readonly SKControl _skControl;

    public WinFormBitmapRenderSurfaceAdapter Adapter { get; }

    public RenderSurfaceHost<BitmapBackbuffer> Host { get; }

    public WinFormBitmapRenderSurfaceControl()
    {
        _skControl = new SKControl { Dock = DockStyle.Fill };
        Controls.Add(_skControl);
 
        // Forward mouse events
        _skControl.MouseDown += (s, e) => OnMouseDown(e);
        _skControl.MouseUp += (s, e) => OnMouseUp(e);
        _skControl.MouseMove += (s, e) => OnMouseMove(e);
        _skControl.MouseClick += (s, e) => OnMouseClick(e);
        _skControl.MouseWheel += (s, e) => OnMouseWheel(e);
        _skControl.MouseEnter += (s, e) => OnMouseEnter(e);
        _skControl.MouseLeave += (s, e) => OnMouseLeave(e);
 
        // Create the render adapter for the SKControl
        Adapter = new WinFormBitmapRenderSurfaceAdapter(_skControl);
 
        // Create the surface and hook the adapter
        Host = new RenderSurfaceHost<BitmapBackbuffer>(Adapter);
 
        // Ensure the adapter re-reads size whenever THIS wrapper changes size
        SizeChanged += (_, __) => Adapter.RefreshDestinationSize();
 
        // Fire once after this control is realized
        HandleCreated += (_, __) => Adapter.RefreshDestinationSize();
        if (IsHandleCreated)
            BeginInvoke((Action)Adapter.RefreshDestinationSize);
    }

    protected override void OnParentChanged(EventArgs e)
    {
        base.OnParentChanged(e);
        if (IsHandleCreated)
            BeginInvoke((Action)Adapter.RefreshDestinationSize);
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
            Host?.Dispose();
        }
 
        base.Dispose(disposing);
    }
}