GtkOpenGL.cs

using OpenTK;

namespace Xamarin.Forms.Platform.GTK
{
	public static class GtkOpenGL
	{
		public static bool IsInitialized { get; private set; }

		public static void Init()
		{
			if (IsInitialized)
				return;

			// Initializes OpenTK. This method is necessary because we are using OpenTK alongside a different windowing toolkit (GTK#).
			// Should be the very first method called by the application (i.e. calling this method should be the very first statement executed by the "Main" method).
			Toolkit.Init(new ToolkitOptions
			{
				Backend = PlatformBackend.PreferNative,
				EnableHighResolution = true
			});

			IsInitialized = true;
		}
	}
}