[VL.ImGui.Stride.Viewports]

VL.ImGui.Skia/src/SkiaWidget.cs

@@ -52,21 +52,20 @@ protected override void Draw(Context context, in ImDrawListPtr drawList, in Syst
                 //if (context.DrawList == DrawList.AtCursor)
                 //    ImGui.Image(0, size);
 
+                // because we use Callback instead of Image  
+
+
                 drawList.AddCallback(id, IntPtr.Zero);
             }
         }
 
         [Pin(Ignore = true)]
         public RectangleF? Bounds => !_disposed ? Layer?.Bounds : default;
 
-        // What is this for?
-        //SKMatrix? trans;
-
         public void Render(CallerInfo caller)
         {
             if (_disposed || Layer is null)
                 return;
-            //trans = caller.Transformation;
             Layer.Render(caller);
         }
 
@@ -82,11 +81,7 @@ public bool Notify(INotification notification, CallerInfo caller)
             if (EventFilter == EventFilter.WindowHasFocus && !_windowHasFocus)
                 return false;
 
-
-            //if (trans != null)
-            //    return Layer.Notify(notification, caller.WithTransformation((SKMatrix)trans));
-            //else
-                return Layer.Notify(notification, caller); ;
+            return Layer.Notify(notification, caller); ;
         }
 
         public void Dispose()

VL.ImGui.Skia/src/ToSkiaLayer.cs

@@ -341,7 +341,7 @@ public bool Notify(INotification notification, CallerInfo caller)
         {
             using (_context.MakeCurrent())
             {
-                _io.HandleNotification(notification, useWorldSpace: true);
+                _io.HandleNotification(notification);
 
                 foreach (var layer in _context.Layers)
                 {

VL.ImGui.Skia/src/ToSkiaLayerVersion1.cs

@@ -344,7 +344,7 @@ public bool Notify(INotification notification, CallerInfo caller)
         {
             using (_context.MakeCurrent())
             {
-                _io.HandleNotification(notification, useWorldSpace: true);
+                _io.HandleNotification(notification);
 
                 foreach (var layer in _context.Layers)
                 {

VL.ImGui.Stride/src/Effects/ImGuiEffectShader.sdsl

@@ -3,10 +3,11 @@
     internal shader ImGuiEffectShader<bool TSRgb> : ShaderBase, PositionStream2, ColorBase, Texturing
     {
         matrix proj;
+        float2 offset;
 
         override stage void VSMain() 
         {
-            streams.ShadingPosition = mul(proj, float4(streams.Position2, 0.0, 1.0f)) + float4(-1.0f, 1.0f, 0.0f, 0.0f);
+            streams.ShadingPosition = mul(proj, float4(streams.Position2 - offset, 0.0, 1.0f)) + float4( -1.0f, 1.0f, 0.0f, 0.0f);
 
             if (TSRgb)
             {

VL.ImGui.Stride/src/Effects/ImGuiEffectShader.sdsl.cs

@@ -19,5 +19,6 @@ namespace VL.ImGui.Stride.Effects
     internal static partial class ImGuiEffectShaderKeys
     {
         public static readonly ValueParameterKey<Matrix> proj = ParameterKeys.NewValue<Matrix>();
+        public static readonly ValueParameterKey<Vector2> offset = ParameterKeys.NewValue<Vector2>();
     }
 }

VL.ImGui.Stride/src/FixedAsciiString.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace VL.ImGui.Stride
+{
+    public class FixedAsciiString : IDisposable
+    {
+        public IntPtr DataPtr { get; }
+
+        public unsafe FixedAsciiString(string s)
+        {
+            int byteCount = Encoding.ASCII.GetByteCount(s);
+            DataPtr = Marshal.AllocHGlobal(byteCount + 1);
+            fixed (char* sPtr = s)
+            {
+                int end = Encoding.ASCII.GetBytes(sPtr, s.Length, (byte*)DataPtr, byteCount);
+                ((byte*)DataPtr)[end] = 0;
+            }
+        }
+
+        public void Dispose()
+        {
+            Marshal.FreeHGlobal(DataPtr);
+        }
+    }
+}

VL.ImGui.Stride/src/ImGuiRenderer.InputHandling.cs

@@ -1,7 +1,10 @@
-using Stride.Input;
+using SkiaSharp;
+using Stride.Input;
 using Stride.Rendering;
 using System.Reactive.Disposables;
+using VL.Skia;
 using VL.Stride;
+using CommonSpace = VL.Skia.CommonSpace;
 
 namespace VL.ImGui
 {
@@ -16,14 +19,30 @@ IDisposable SubscribeToInputSource(IInputSource inputSource, RenderDrawContext c
             if (inputManager is null)
                 return Disposable.Empty;
 
+            // Mimic the behavior of the Skia render path
+            var viewport = context.RenderContext.ViewportState.Viewport0;
+            var viewportLayer = new InViewportUpstream();
+            var withinCommonSpaceLayer = new SetSpaceUpstream2();
+
+            var self = new SetNotify();
+            self.Update(null, (n, c) =>
+            {
+                using (_strideDeviceContext.MakeCurrent())
+                {
+                    _strideDeviceContext.IO.HandleNotification(n);
+                }
+                return n.Handled;
+            }, out _);
+
+            withinCommonSpaceLayer.Update(self, out var spaceLayer, CommonSpace.DIPTopLeft);
+            viewportLayer.Update(spaceLayer, SKRect.Create(viewport.X, viewport.Y, viewport.Width, viewport.Height), CommonSpace.PixelTopLeft, out _);
+
+            var callerInfo = CallerInfo.InRenderer(viewport.Width, viewport.Height, canvas: null, context: null);
             return inputManager.GetNotifications(inputSource, sender: this)
-                .Subscribe(notification =>
+                .Subscribe(n =>
                 {
-                    using (_context.MakeCurrent())
-                    {
-                        _io.HandleNotification(notification, useWorldSpace: false);
-                    }
-                });
+                    viewportLayer.Notify(n, callerInfo);
+            });
         }
     }
 }