public static void Start()
{
GlfwWindowEventListener winEventListener = new GlfwWindowEventListener();
var form = new GlFwForm(800, 600, "hello!", winEventListener);
form.MakeCurrent();
string versionStr3 = Marshal.PtrToStringAnsi(Glfw3.glfwGetVersionString());
OpenTK.Platform.Factory.GetCustomPlatformFactory = () => OpenTK.Platform.Egl.EglAngle.NewFactory();
OpenTK.Toolkit.Init(new OpenTK.ToolkitOptions {
Backend = OpenTK.PlatformBackend.PreferNative,
});
OpenTK.Graphics.PlatformAddressPortal.GetAddressDelegate = OpenTK.Platform.Utilities.CreateGetAddress();
//-----------
IntPtr currentContext = Glfw3.glfwGetCurrentContext();
var contextHandler = new OpenTK.ContextHandle(currentContext);
var glfwContext = new GLFWContextForOpenTK(contextHandler);
var context = OpenTK.Graphics.GraphicsContext.CreateExternalContext(glfwContext);
bool isCurrent = context.IsCurrent;
var demoContext = new Mini.GLDemoContext(800, 600);
demoContext.LoadDemo(new OpenTkEssTest.T108_LionFill());
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.ClearColor(1, 1, 1, 1);
//--------------------------------------------------------------------------------
//setup viewport size
//set up canvas
int ww_w = 800;
int ww_h = 600;
int max = Math.Max(ww_w, ww_h);
GL.Viewport(0, 0, max, max);
//---------
form.RenderDel = () =>
{
demoContext.Render();
form.SwapBuffers();
};
//---------
GlfwAppLoop.Run();
}