1 files changed, 102 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.Android/Renderers/OpenGLViewRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/OpenGLViewRenderer.cs
new file mode 100644
index 00000000..5c787b76
--- /dev/null
+++ b/Xamarin.Forms.Platform.Android/Renderers/OpenGLViewRenderer.cs
@@ -0,0 +1,102 @@
+using System;
+using System.ComponentModel;
+using Android.Opengl;
+using Javax.Microedition.Khronos.Opengles;
+using EGLConfig = Javax.Microedition.Khronos.Egl.EGLConfig;
+using Object = Java.Lang.Object;
+
+namespace Xamarin.Forms.Platform.Android
+{
+	internal class OpenGLViewRenderer : ViewRenderer<OpenGLView, GLSurfaceView>
+	{
+		bool _disposed;
+
+		public OpenGLViewRenderer()
+		{
+			AutoPackage = false;
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			if (!_disposed && disposing)
+			{
+				_disposed = true;
+
+				if (Element != null)
+					((IOpenGlViewController)Element).DisplayRequested -= Display;
+			}
+			base.Dispose(disposing);
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<OpenGLView> e)
+		{
+			base.OnElementChanged(e);
+
+			if (e.OldElement != null)
+				((IOpenGlViewController)Element).DisplayRequested -= Display;
+
+			if (e.NewElement != null)
+			{
+				GLSurfaceView surfaceView = Control;
+				if (surfaceView == null)
+				{
+					surfaceView = new GLSurfaceView(Context);
+					surfaceView.SetEGLContextClientVersion(2);
+					SetNativeControl(surfaceView);
+				}
+
+				((IOpenGlViewController)Element).DisplayRequested += Display;
+				surfaceView.SetRenderer(new Renderer(Element));
+				SetRenderMode();
+			}
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == OpenGLView.HasRenderLoopProperty.PropertyName)
+				SetRenderMode();
+		}
+
+		void Display(object sender, EventArgs eventArgs)
+		{
+			if (Element.HasRenderLoop)
+				return;
+			Control.RequestRender();
+		}
+
+		void SetRenderMode()
+		{
+			Control.RenderMode = Element.HasRenderLoop ? Rendermode.Continuously : Rendermode.WhenDirty;
+		}
+
+		class Renderer : Object, GLSurfaceView.IRenderer
+		{
+			readonly OpenGLView _model;
+			Rectangle _rect;
+
+			public Renderer(OpenGLView model)
+			{
+				_model = model;
+			}
+
+			public void OnDrawFrame(IGL10 gl)
+			{
+				Action<Rectangle> onDisplay = _model.OnDisplay;
+				if (onDisplay == null)
+					return;
+				onDisplay(_rect);
+			}
+
+			public void OnSurfaceChanged(IGL10 gl, int width, int height)
+			{
+				_rect = new Rectangle(0.0, 0.0, width, height);
+			}
+
+			public void OnSurfaceCreated(IGL10 gl, EGLConfig config)
+			{
+			}
+		}
+	}
+}
+\ No newline at end of file