在Winform中创建Silk.NET.OpenGL窗体

整体思路

1. 创建 OpenGL 窗体
2. 获取 OpenGL 窗体 句柄
3. 将 OpenGL 窗体 嵌入 Winform Panel 控件中

定义 OpenGL 窗体

public partial class MainForm : Form
{
    private static IWindow? _window;
    public MainForm()
    {
        InitializeComponent();
    }
}

创建 OpenGL 窗体

设置创建时参数，并绑定窗体 Load 事件

private void Create_OpenGL_Window()
{
    WindowOptions options = WindowOptions.Default with
    {
        Size = new Vector2D<int>(panel_render.Width, panel_render.Height),
        Title = "My first Silk.NET application!"
    };
    _window = Window.Create(options);
    _window.Load += OpenGL_Window_Load;
    _window.Run();
}

public void OpenGL_Window_Load()
{
    if (_window != null)
    {
        // 将 OpenGL 窗口嵌入 Panel
        EmbedGlfwWindowIntoPanel(_window, panel_render.Handle);
    }
}

将 OpenGL 窗体 嵌入 Winform Panel 控件中

// 将 OpenGL 窗口嵌入 Panel
private void EmbedGlfwWindowIntoPanel(IWindow glWindow, IntPtr panelHandle)
{
    string windowTitle = glWindow.Title;
    IntPtr hwnd = Win32.FindWindow(null, windowTitle);
    //IntPtr hwnd = glWindow.Handle;

    if (hwnd != IntPtr.Zero)
    {
        Win32.SetParent(hwnd, panelHandle);
        Win32.SetWindowLong(hwnd, Win32.GWL_STYLE, Win32.WS_VISIBLE | Win32.WS_CHILD);
        Win32.MoveWindow(hwnd, 0, 0, panel_render.Width, panel_render.Height, true);
    }
    else
    {
        MessageBox.Show("Failed to find GLFW window handle.");
    }
}
// Win32 API 互操作
public static class Win32
{
    [DllImport("user32.dll")]
    public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

    [DllImport("user32.dll")]
    public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

    [DllImport("user32.dll")]
    public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

    [DllImport("user32.dll")]
    public static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

    public const int GWL_STYLE = -16;
    public const int WS_CHILD = 0x40000000;
    public const int WS_VISIBLE = 0x10000000;
}