Clean up initial OpenGL passes

UIX.RenderApi.OpenGL/Animation/GLAnimation.cs

@@ -52,7 +52,7 @@ namespace Microsoft.Iris.Render.OpenGL
         public override void Play()
         {
             base.Play();
-            foreach (GLAnimation a in m_members)
+            foreach (var a in m_members)
                 a.Play();
         }
 
@@ -60,7 +60,7 @@ namespace Microsoft.Iris.Render.OpenGL
 
         internal override void Advance(int advanceMs)
         {
-            foreach (GLAnimation a in m_members)
+            foreach (var a in m_members)
                 a.Advance(advanceMs);
         }
     }

UIX.RenderApi.OpenGL/Animation/GLAnimationSystem.cs

@@ -36,24 +36,19 @@ namespace Microsoft.Iris.Render.OpenGL
         {
             if (m_paused)
                 return;
-            int scaled = (int)(nAdvanceMs * SpeedAdjustment);
+            
-            foreach (GLAnimation a in m_animations)
+            var scaled = (int)(nAdvanceMs * SpeedAdjustment);
-            {
+            StepAnimations(scaled);
-                if (a.IsPlaying)
-                    a.Advance(scaled);
-            }
         }
 
         public void PauseAnimations() => m_paused = true;
 
         public void StepAnimations(int nAdvanceMs)
         {
-            foreach (GLAnimation a in m_animations)
+            foreach (var a in m_animations)
-            {
                 if (a.IsPlaying)
                     a.Advance(nAdvanceMs);
         }
-        }
 
         public void ResumeAnimations() => m_paused = false;
     }

UIX.RenderApi.OpenGL/Engine/GLDisplay.cs

@@ -9,8 +9,6 @@ namespace Microsoft.Iris.Render.OpenGL
     /// </summary>
     public sealed class GLDisplay : IDisplay
     {
-        private readonly DisplayMode m_mode;
-
         public GLDisplay(IMonitor monitor, bool isPrimary)
         {
             DeviceName = monitor.Name ?? $"Monitor{monitor.Index}";
@@ -21,7 +19,7 @@ namespace Microsoft.Iris.Render.OpenGL
 
             var size = new Size(b.Size.X, b.Size.Y);
             LogicalFullScreenResolution = size;
-            m_mode = new DisplayMode
+            CurrentMode = new DisplayMode
             {
                 sizePhysicalPxl = size,
                 sizeLogicalPxl = size,
@@ -39,11 +37,11 @@ namespace Microsoft.Iris.Render.OpenGL
         public bool TvMode => false;
         public Size LogicalFullScreenResolution { get; }
 
-        public DisplayMode[] SupportedModes => new[] { m_mode };
+        public DisplayMode[] SupportedModes => new[] { CurrentMode };
         public DisplayMode[] ExtraModes => DisplayMode.EmptyModes;
         public DisplayMode[] AllModes => SupportedModes;
-        public DisplayMode CurrentMode => m_mode;
+        public DisplayMode CurrentMode { get; }
-        public DisplayMode DesktopMode => m_mode;
+        public DisplayMode DesktopMode => CurrentMode;
         public string MonitorPnP => DeviceName;
 
         public bool ValidateDisplayMode(
@@ -54,7 +52,7 @@ namespace Microsoft.Iris.Render.OpenGL
             out DisplayModeFlags nCompleteCheck)
         {
             // We only expose the desktop mode, so echo it back as the completed mode.
-            modeComplete = m_mode;
+            modeComplete = CurrentMode;
             nCompleteCheck = nCheck;
             return true;
         }

UIX.RenderApi.OpenGL/Engine/GLDisplayManager.cs

@@ -33,11 +33,10 @@ namespace Microsoft.Iris.Render.OpenGL
 
         public IDisplay DisplayFromDeviceName(string stDeviceName)
         {
-            foreach (GLDisplay d in m_displays)
+            foreach (var d in m_displays)
-            {
                 if (d.DeviceName == stDeviceName)
                     return d;
-            }
+                
             return PrimaryDisplay;
         }
     }

UIX.RenderApi.OpenGL/Engine/GLInputTranslator.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Microsoft.Iris.Input;
 using Silk.NET.Input;
 using SilkKey = Silk.NET.Input.Key;
@@ -37,9 +38,9 @@ namespace Microsoft.Iris.Render.OpenGL
             m_input = input;
             m_window = window;
 
-            foreach (IKeyboard keyboard in context.Keyboards)
+            foreach (var keyboard in context.Keyboards)
                 Hook(keyboard);
-            foreach (IMouse mouse in context.Mice)
+            foreach (var mouse in context.Mice)
                 Hook(mouse);
 
             context.ConnectionChanged += OnConnectionChanged;
@@ -120,7 +121,14 @@ namespace Microsoft.Iris.Render.OpenGL
 
         private void OnMouseDown(IMouse mouse, SilkMouseButton button)
         {
-            (uint message, MouseButtons iris) = button switch
+            var message = MapSilkMouseButton(button, out var iris);
+            if (message != 0)
+                DispatchMouse(mouse, message, iris, 0);
+        }
+
+        private static uint MapSilkMouseButton(SilkMouseButton button, out MouseButtons iris)
+        {
+            (var message, iris) = button switch
             {
                 SilkMouseButton.Left => (WM_LBUTTONDOWN, MouseButtons.Left),
                 SilkMouseButton.Right => (WM_RBUTTONDOWN, MouseButtons.Right),
@@ -129,36 +137,19 @@ namespace Microsoft.Iris.Render.OpenGL
                 SilkMouseButton.Button5 => (WM_XBUTTONDOWN, MouseButtons.XButton2),
                 _ => (0u, MouseButtons.None),
             };
-            if (message != 0)
+            return message;
-                DispatchMouse(mouse, message, iris, 0);
         }
 
         private void OnMouseUp(IMouse mouse, SilkMouseButton button)
         {
-            (uint message, MouseButtons iris) = button switch
+            var message = MapSilkMouseButton(button, out var iris);
-            {
-                SilkMouseButton.Left => (WM_LBUTTONUP, MouseButtons.Left),
-                SilkMouseButton.Right => (WM_RBUTTONUP, MouseButtons.Right),
-                SilkMouseButton.Middle => (WM_MBUTTONUP, MouseButtons.Middle),
-                SilkMouseButton.Button4 => (WM_XBUTTONUP, MouseButtons.XButton1),
-                SilkMouseButton.Button5 => (WM_XBUTTONUP, MouseButtons.XButton2),
-                _ => (0u, MouseButtons.None),
-            };
             if (message != 0)
                 DispatchMouse(mouse, message, iris, 0);
         }
 
         private void OnDoubleClick(IMouse mouse, SilkMouseButton button, System.Numerics.Vector2 position)
         {
-            (uint message, MouseButtons iris) = button switch
+            var message = MapSilkMouseButton(button, out var iris);
-            {
-                SilkMouseButton.Left => (WM_LBUTTONDBLCLK, MouseButtons.Left),
-                SilkMouseButton.Right => (WM_RBUTTONDBLCLK, MouseButtons.Right),
-                SilkMouseButton.Middle => (WM_MBUTTONDBLCLK, MouseButtons.Middle),
-                SilkMouseButton.Button4 => (WM_XBUTTONDBLCLK, MouseButtons.XButton1),
-                SilkMouseButton.Button5 => (WM_XBUTTONDBLCLK, MouseButtons.XButton2),
-                _ => (0u, MouseButtons.None),
-            };
             if (message != 0)
                 DispatchMouse(mouse, message, iris, 0, doubleClick: true);
         }
@@ -216,41 +207,53 @@ namespace Microsoft.Iris.Render.OpenGL
             InputModifiers m = InputModifiers.None;
             foreach (IKeyboard k in m_context.Keyboards)
             {
-                if (k.IsKeyPressed(SilkKey.ControlLeft) || k.IsKeyPressed(SilkKey.ControlRight)) m |= InputModifiers.ControlKey;
+                if (k.IsKeyPressed(SilkKey.ControlLeft) || k.IsKeyPressed(SilkKey.ControlRight))
-                if (k.IsKeyPressed(SilkKey.ShiftLeft) || k.IsKeyPressed(SilkKey.ShiftRight)) m |= InputModifiers.ShiftKey;
+                    m |= InputModifiers.ControlKey;
-                if (k.IsKeyPressed(SilkKey.AltLeft) || k.IsKeyPressed(SilkKey.AltRight)) m |= InputModifiers.AltKey;
+                
-                if (k.IsKeyPressed(SilkKey.SuperLeft) || k.IsKeyPressed(SilkKey.SuperRight)) m |= InputModifiers.WindowsKey;
+                if (k.IsKeyPressed(SilkKey.ShiftLeft) || k.IsKeyPressed(SilkKey.ShiftRight))
+                    m |= InputModifiers.ShiftKey;
+                
+                if (k.IsKeyPressed(SilkKey.AltLeft) || k.IsKeyPressed(SilkKey.AltRight))
+                    m |= InputModifiers.AltKey;
+                
+                if (k.IsKeyPressed(SilkKey.SuperLeft) || k.IsKeyPressed(SilkKey.SuperRight))
+                    m |= InputModifiers.WindowsKey;
             }
 
             mouse ??= FirstMouse();
             if (mouse != null)
             {
-                if (mouse.IsButtonPressed(SilkMouseButton.Left)) m |= InputModifiers.LeftMouse;
+                if (mouse.IsButtonPressed(SilkMouseButton.Left))
-                if (mouse.IsButtonPressed(SilkMouseButton.Right)) m |= InputModifiers.RightMouse;
+                    m |= InputModifiers.LeftMouse;
-                if (mouse.IsButtonPressed(SilkMouseButton.Middle)) m |= InputModifiers.MiddleMouse;
+                
-                if (mouse.IsButtonPressed(SilkMouseButton.Button4)) m |= InputModifiers.XMouse1;
+                if (mouse.IsButtonPressed(SilkMouseButton.Right))
-                if (mouse.IsButtonPressed(SilkMouseButton.Button5)) m |= InputModifiers.XMouse2;
+                    m |= InputModifiers.RightMouse;
+                
+                if (mouse.IsButtonPressed(SilkMouseButton.Middle))
+                    m |= InputModifiers.MiddleMouse;
+                
+                if (mouse.IsButtonPressed(SilkMouseButton.Button4))
+                    m |= InputModifiers.XMouse1;
+                
+                if (mouse.IsButtonPressed(SilkMouseButton.Button5))
+                    m |= InputModifiers.XMouse2;
             }
+            
             return m;
         }
 
-        private IMouse? FirstMouse()
+        private IMouse? FirstMouse() => m_context.Mice.Count > 0 ? m_context.Mice[0] : null;
-        {
-            foreach (IMouse mouse in m_context.Mice)
-                return mouse;
-            return null;
-        }
 
         public void Dispose()
         {
             m_context.ConnectionChanged -= OnConnectionChanged;
-            foreach (IKeyboard keyboard in m_context.Keyboards)
+            foreach (var keyboard in m_context.Keyboards)
             {
                 keyboard.KeyDown -= OnKeyDown;
                 keyboard.KeyUp -= OnKeyUp;
                 keyboard.KeyChar -= OnKeyChar;
             }
-            foreach (IMouse mouse in m_context.Mice)
+            foreach (var mouse in m_context.Mice)
             {
                 mouse.MouseMove -= OnMouseMove;
                 mouse.MouseDown -= OnMouseDown;

UIX.RenderApi.OpenGL/OpenGLRenderApi.cs

@@ -12,20 +12,9 @@ namespace Microsoft.Iris.Render.OpenGL
         /// <summary>Create an OpenGL render engine for the given Iris engine info.</summary>
         public static IRenderEngine CreateEngine(IrisEngineInfo engineInfo, IRenderHost renderHost)
         {
-            if (engineInfo == null) throw new ArgumentNullException(nameof(engineInfo));
+            ArgumentNullException.ThrowIfNull(engineInfo);
-            if (renderHost == null) throw new ArgumentNullException(nameof(renderHost));
+            ArgumentNullException.ThrowIfNull(renderHost);
             return new GLRenderEngine(engineInfo, renderHost);
         }
-
-        /// <summary>
-        /// Convenience overload matching <c>RenderApi.CreateEngine</c>'s signature.
-        /// Only <see cref="IrisEngineInfo"/> is supported (the sole EngineType).
-        /// </summary>
-        public static IRenderEngine CreateEngine(EngineInfo engineInfo, IRenderHost renderHost)
-        {
-            if (engineInfo is not IrisEngineInfo iris)
-                throw new ArgumentException("Only IrisEngineInfo is supported.", nameof(engineInfo));
-            return CreateEngine(iris, renderHost);
-        }
     }
 }

UIX.RenderApi.OpenGL/Rendering/SceneRenderer.cs

@@ -10,28 +10,33 @@ namespace Microsoft.Iris.Render.OpenGL
     /// </summary>
     internal sealed unsafe class SceneRenderer : IDisposable
     {
-        private const string VertexSource = @"#version 330 core
+        private const string VertexSource =
-layout(location = 0) in vec2 aPos;
+            """
-layout(location = 1) in vec2 aTex;
+            #version 330 core
-uniform mat4 uModel;
+            layout(location = 0) in vec2 aPos;
-uniform mat4 uProj;
+            layout(location = 1) in vec2 aTex;
-uniform vec2 uSize;
+            uniform mat4 uModel;
-out vec2 vTex;
+            uniform mat4 uProj;
-void main()
+            uniform vec2 uSize;
-{
+            out vec2 vTex;
+            void main()
+            {
                 vTex = aTex;
                 gl_Position = uProj * uModel * vec4(aPos * uSize, 0.0, 1.0);
-}";
+            }
+""";
 
-        private const string FragmentSource = @"#version 330 core
+        private const string FragmentSource =
-in vec2 vTex;
+            """
-out vec4 fragColor;
+            #version 330 core
-uniform sampler2D uTex;
+            in vec2 vTex;
-uniform int uUseTexture;
+            out vec4 fragColor;
-uniform vec4 uColor;
+            uniform sampler2D uTex;
-uniform float uAlpha;
+            uniform int uUseTexture;
-void main()
+            uniform vec4 uColor;
-{
+            uniform float uAlpha;
+            void main()
+            {
               if (uUseTexture == 1)
               {
                   vec4 t = texture(uTex, vTex);
@@ -41,7 +46,8 @@ void main()
               {
                   fragColor = vec4(uColor.rgb, uColor.a * uAlpha);
               }
-}";
+            }
+            """;
 
         private readonly GL m_gl;
         private readonly uint m_program;

UIX.RenderApi.OpenGL/Scene/GLEffect.cs

@@ -55,7 +55,7 @@ namespace Microsoft.Iris.Render.OpenGL
         {
             get
             {
-                foreach (object v in m_values.Values)
+                foreach (var v in m_values.Values)
                 {
                     if (v is GLImage img)
                         return img;

UIX.RenderApi.OpenGL/Scene/GLVisual.cs

@@ -77,16 +77,15 @@ namespace Microsoft.Iris.Render.OpenGL
 
         public void AddGradient(IGradient gradient)
         {
-            if (gradient is GLGradient g)
+            if (gradient is not GLGradient g)
-            {
+                return;
             g.RegisterUsage(this);
             m_gradients.Add(g);
         }
-        }
 
         public void RemoveAllGradients()
         {
-            foreach (GLGradient g in m_gradients)
+            foreach (var g in m_gradients)
                 g.UnregisterUsage(this);
             m_gradients.Clear();
         }

UIX.RenderApi.OpenGL/Scene/GLVisualContainer.cs

@@ -10,15 +10,14 @@ namespace Microsoft.Iris.Render.OpenGL
     public sealed class GLVisualContainer : GLVisual, IVisualContainer
     {
         private readonly List<GLVisual> m_children = new List<GLVisual>();
-        private readonly bool m_isRoot;
 
         public GLVisualContainer(GLRenderSession session, object ownerData, bool isRoot)
             : base(session, ownerData)
         {
-            m_isRoot = isRoot;
+            IsRoot = isRoot;
         }
 
-        public bool IsRoot => m_isRoot;
+        public bool IsRoot { get; }
         public int ChildCount => m_children.Count;
         public ICamera? Camera { get; set; }
 
@@ -52,12 +51,11 @@ namespace Microsoft.Iris.Render.OpenGL
 
         public void RemoveChild(IVisual vChild)
         {
-            if (vChild is GLVisual child && m_children.Remove(child))
+            if (vChild is not GLVisual child || !m_children.Remove(child))
-            {
+                return;
             child.ParentContainer = null;
             child.UnregisterUsage(this);
         }
-        }
 
         public void RemoveAllChildren()
         {
@@ -77,7 +75,7 @@ namespace Microsoft.Iris.Render.OpenGL
             // Draw children back-to-front by layer. OrderBy is stable, preserving
             // insertion order within a layer.
             m_children.Sort((a, b) => a.Layer.CompareTo(b.Layer));
-            foreach (GLVisual child in m_children)
+            foreach (var child in m_children)
                 child.Render(renderer, matrix, alpha);
         }
 
@@ -93,7 +91,7 @@ namespace Microsoft.Iris.Render.OpenGL
             m_children.Sort((a, b) => a.Layer.CompareTo(b.Layer));
             for (int i = m_children.Count - 1; i >= 0; i--)
             {
-                GLVisual? hit = m_children[i].HitTest(screenPoint, world);
+                var hit = m_children[i].HitTest(screenPoint, world);
                 if (hit != null)
                     return hit;
             }

UIX.RenderApi/Microsoft/Iris/Render/Protocol/EngineApi.cs

@@ -112,49 +112,6 @@ namespace Microsoft.Iris.Render.Protocol
             }
         }
 
-#if !NETFRAMEWORK
-        public static HRESULT SpInit(ref InitArgs args) => new HRESULT(0);
-
-        public static HRESULT SpUninit() => new HRESULT(0);
-
-        public static unsafe HRESULT SpBufferOpen(
-          BufferInfo* phdrData,
-          void* pvData)
-        {
-            var src = new Iface.ContextID(ContextID.ToUInt32(phdrData->idContextSrc));
-            var dest = new Iface.ContextID(ContextID.ToUInt32(phdrData->idContextDest));
-            var bufferHandle = new Iface.RENDERHANDLE(RENDERHANDLE.ToUInt32(phdrData->idBuffer));
-            var flags = (Iface.BufferFlags)phdrData->nFlags;
-            var span = new ReadOnlySpan<byte>(pvData, (int)phdrData->cbSizeBuffer);
-
-            Iface.HRESULT result = EngineService.SendBuffer(src, dest, bufferHandle, flags, span);
-            return new HRESULT(result.hr);
-        }
-
-        public static unsafe HRESULT SpWrapBufferProc(
-          MessageBufferEventHandler pfnProcessBufferProc,
-          IntPtr* ppNativeProc)
-        {
-            if (ppNativeProc == null)
-                return new HRESULT(unchecked((int)0x80070057));
-
-            if (pfnProcessBufferProc == null)
-            {
-                *ppNativeProc = IntPtr.Zero;
-                return new HRESULT(0);
-            }
-
-            // Managed-direct: store the delegate itself instead of marshaling to a
-            // native function pointer -- SpRenderThreadInit resolves this straight back
-            // to the delegate object and invokes it directly, no calli anywhere on this
-            // path. See logs/UIXrender/EngineCore.md.
-            GCHandle handle = GCHandle.Alloc(pfnProcessBufferProc, GCHandleType.Normal);
-            *ppNativeProc = GCHandle.ToIntPtr(handle);
-            return new HRESULT(0);
-        }
-#else
-        // net461 (EnableNetFXTarget): UIXrender's managed API isn't referenceable from
-        // .NET Framework, so this TFM keeps calling the real native UIXRender.dll.
         [DllImport(s_stEhRenderDll)]
         public static extern HRESULT SpInit(ref InitArgs args);
 
@@ -170,41 +127,7 @@ namespace Microsoft.Iris.Render.Protocol
         public static extern unsafe HRESULT SpWrapBufferProc(
           MessageBufferEventHandler pfnProcessBufferProc,
           IntPtr* ppNativeProc);
-#endif
 
-#if !NETFRAMEWORK
-        // No Win32 message queue exists behind this reimplementation (see EngineService),
-        // and LocalChannel -- the path Zune uses -- never peeks. Reports "no message".
-        public static HRESULT SpPeekMessage(
-          out Win32Api.MSG msg,
-          HWND hwnd,
-          uint nMsgFilterMin,
-          uint nMsgFilterMax,
-          uint wRemoveMsg,
-          out WorkResult nResult)
-        {
-            msg = default;
-            nResult = (WorkResult)EngineService.PeekMessage(nMsgFilterMin, nMsgFilterMax, wRemoveMsg);
-            return new HRESULT(0);
-        }
-
-        public static HRESULT SpWaitMessage(uint nTimeOutMs, IntPtr _unused)
-        {
-            EngineService.WaitMessage(nTimeOutMs);
-            return new HRESULT(0);
-        }
-
-        public static HRESULT SpInvoke(
-          ContextID idContext,
-          IntPtr pfnInvoke,
-          IntPtr pvArgs,
-          bool synchronous)
-        {
-            Iface.HRESULT result = EngineService.Invoke(
-              new Iface.ContextID(ContextID.ToUInt32(idContext)), pfnInvoke, pvArgs, synchronous);
-            return new HRESULT(result.hr);
-        }
-#else
         [DllImport(s_stEhRenderDll, CharSet = CharSet.Auto)]
         public static extern HRESULT SpPeekMessage(
           out Win32Api.MSG msg,
@@ -223,65 +146,7 @@ namespace Microsoft.Iris.Render.Protocol
           IntPtr pfnInvoke,
           IntPtr pvArgs,
           bool synchronous);
-#endif
 
-#if !NETFRAMEWORK
-        public static HRESULT SpRenderThreadInit(
-          ref InitArgs argsRender,
-          out IntPtr pThread)
-        {
-            var contextId = new Iface.ContextID(ContextID.ToUInt32(argsRender.idContext));
-
-            MessageBufferEventHandler managedCallback = argsRender.pfnProcessBuffer != IntPtr.Zero
-              ? GCHandle.FromIntPtr(argsRender.pfnProcessBuffer).Target as MessageBufferEventHandler
-              : null;
-
-            BufferReceivedHandler handler = managedCallback != null
-              ? AdaptCallback(managedCallback, argsRender.idContext)
-              : delegate { };
-
-            IRenderThreadHandle threadHandle = EngineService.StartRenderThread(contextId, handler);
-            pThread = GCHandle.ToIntPtr(GCHandle.Alloc(threadHandle, GCHandleType.Normal));
-            return new HRESULT(0);
-        }
-
-        // Adapts a stored MessageBufferEventHandler (already-decompiled, still
-        // pointer-shaped -- see logs/UIXrender/EngineCore.md) into the idiomatic
-        // BufferReceivedHandler shape EngineService deals in. Factored out of
-        // SpRenderThreadInit so that method reads as resolve -> adapt -> start -> wrap,
-        // and named to make clear it's the same kind of adaptation
-        // UIXrender/Interop/EngineApi.cs's own SpRenderThreadInit does for native
-        // callers (there: raw function pointer -> BufferReceivedHandler; here: managed
-        // delegate -> BufferReceivedHandler -- same shape, different invocation
-        // mechanism at the end).
-        private static unsafe BufferReceivedHandler AdaptCallback(MessageBufferEventHandler callback, ContextID destContext) =>
-            (source, bufferHandle, flags, data) =>
-            {
-                fixed (byte* pData = data)
-                {
-                    var info = new BufferInfo
-                    {
-                        idContextSrc = ContextID.FromUInt32(source.value),
-                        idContextDest = destContext,
-                        idBuffer = RENDERHANDLE.FromUInt32(bufferHandle.value),
-                        nFlags = (BufferFlags)flags,
-                        cbSizeBuffer = (uint)data.Length,
-                    };
-                    callback(IntPtr.Zero, source.value, &info, pData);
-                }
-            };
-
-        public static HRESULT SpRenderThreadUninit(IntPtr pThread)
-        {
-            if (pThread == IntPtr.Zero)
-                return new HRESULT(unchecked((int)0x80070057));
-
-            GCHandle handle = GCHandle.FromIntPtr(pThread);
-            (handle.Target as IDisposable)?.Dispose();
-            handle.Free();
-            return new HRESULT(0);
-        }
-#else
         [DllImport(s_stEhRenderDll)]
         public static extern HRESULT SpRenderThreadInit(
           ref InitArgs argsRender,
@@ -289,86 +154,8 @@ namespace Microsoft.Iris.Render.Protocol
 
         [DllImport(s_stEhRenderDll)]
         public static extern HRESULT SpRenderThreadUninit(IntPtr pThread);
-#endif
 
-#if !NETFRAMEWORK
-        public static HRESULT SpRemoteCreateServerStreams(
-          string stSession,
-          TransportProtocol nProtocol,
-          out IntPtr pSendStream,
-          out IntPtr pReceiveStream)
-        {
-            Iface.HRESULT result = EngineService.RemoteCreateServerStreams(
-              stSession, (Iface.Protocol.TransportProtocol)(int)nProtocol, out pSendStream, out pReceiveStream);
-            return new HRESULT(result.hr);
-        }
 
-        public static HRESULT SpRemoteWaitServerStreamsConnected(
-          TransportProtocol nProtocol,
-          IntPtr pSendStream,
-          IntPtr pReceiveStream)
-        {
-            Iface.HRESULT result = EngineService.RemoteWaitServerStreamsConnected(
-              (Iface.Protocol.TransportProtocol)(int)nProtocol, pSendStream);
-            return new HRESULT(result.hr);
-        }
-
-        public static HRESULT SpRemoteServerInit(
-          IntPtr pSendStream,
-          IntPtr pReceiveStream,
-          InitArgs argsSend,
-          out IntPtr pSession)
-        {
-            var context = new Iface.ContextID(ContextID.ToUInt32(argsSend.idContext));
-
-            // Same delegate-behind-a-GCHandle representation SpRenderThreadInit resolves;
-            // RemoteChannel connects without a receive callback (pfnProcessBuffer == 0),
-            // so this is normally null.
-            MessageBufferEventHandler managedCallback = argsSend.pfnProcessBuffer != IntPtr.Zero
-              ? GCHandle.FromIntPtr(argsSend.pfnProcessBuffer).Target as MessageBufferEventHandler
-              : null;
-            BufferReceivedHandler handler = managedCallback != null
-              ? AdaptCallback(managedCallback, argsSend.idContext)
-              : null;
-
-            Iface.HRESULT result = EngineService.RemoteServerInit(pSendStream, context, handler, out pSession);
-            return new HRESULT(result.hr);
-        }
-
-        public static HRESULT SpRemoteServerUninit(
-          IntPtr pSession,
-          bool fForceShutdown,
-          out ShutdownReason nShutdownReason)
-        {
-            Iface.HRESULT result = EngineService.RemoteServerUninit(
-              pSession, fForceShutdown, out Iface.Protocol.ShutdownReason reason);
-            nShutdownReason = (ShutdownReason)(int)reason;
-            return new HRESULT(result.hr);
-        }
-
-        public static HRESULT SpDx9CompileEffect(
-          string stEffect,
-          string stDefines,
-          out IntPtr pErrorString,
-          out IntPtr pErrorBuffer,
-          out IntPtr pEffectBlob,
-          out uint EffectBlobSize,
-          out IntPtr pEffectBlobBuffer)
-        {
-            pErrorString = IntPtr.Zero;
-            pErrorBuffer = IntPtr.Zero;
-            pEffectBlob = IntPtr.Zero;
-            EffectBlobSize = 0U;
-            pEffectBlobBuffer = IntPtr.Zero;
-            return new HRESULT(EngineService.Dx9CompileEffect().hr);
-        }
-
-        // SpObjectRelease's only callers (RemoteChannel) release the stream handles from
-        // SpRemoteCreateServerStreams, which in the managed-direct path are UIXrender
-        // handles, not COM pointers -- so this drops the handle's reference rather than
-        // calling through a vtable.
-        public static void SpObjectRelease(IntPtr pUnknown) => EngineService.ReleaseRemoteStream(pUnknown);
-#else
         [DllImport(s_stEhRenderDll, CharSet = CharSet.Unicode)]
         public static extern HRESULT SpRemoteCreateServerStreams(
           string stSession,
@@ -407,7 +194,6 @@ namespace Microsoft.Iris.Render.Protocol
 
         [DllImport(s_stEhRenderDll)]
         public static extern void SpObjectRelease(IntPtr pUnknown);
-#endif
 
         [Flags]
         public enum BufferFlags