Add image brushes as a construct, as well as move some resource types to Common assembly.

Dashboard.BlurgText.OpenGL/BlurgGLExtension.cs

@@ -0,0 +1,235 @@
+using System.Numerics;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using BlurgText;
+using Dashboard.Drawing;
+using Dashboard.OpenGL;
+using OpenTK.Graphics.OpenGL;
+using OPENGL = OpenTK.Graphics.OpenGL;
+
+namespace Dashboard.BlurgText.OpenGL
+{
+    public class BlurgGLExtension : BlurgDcExtension
+    {
+        private readonly List<int> _textures = new List<int>();
+        private int _program = 0;
+        private int _transformsLocation = -1;
+        private int _atlasLocation = -1;
+        private int _borderWidthLocation = -1;
+        private int _borderColorLocation = -1;
+        private int _fillColorLocation = -1;
+        private int _vertexArray = 0;
+
+        public override Blurg Blurg { get; }
+        public bool SystemFontsEnabled { get; set; }
+        public bool IsDisposed { get; private set; } = false;
+
+        public override string DriverName => "BlurgText";
+        public override string DriverVendor => "Dashboard and BlurgText";
+        public override Version DriverVersion => new Version(1, 0);
+
+        private new GLDeviceContext Context => (GLDeviceContext)base.Context;
+
+        public BlurgGLExtension()
+        {
+            Blurg = new Blurg(AllocateTexture, UpdateTexture);
+            SystemFontsEnabled = Blurg.EnableSystemFonts();
+        }
+
+        ~BlurgGLExtension()
+        {
+            Dispose(false);
+        }
+
+        private void UseProgram()
+        {
+            if (_program != 0)
+            {
+                GL.UseProgram(_program);
+                return;
+            }
+
+            Assembly self = typeof(BlurgGLExtension).Assembly;
+
+            using Stream vsource = self.GetManifestResourceStream("Dashboard.BlurgText.OpenGL.text.vert")!;
+            using Stream fsource = self.GetManifestResourceStream("Dashboard.BlurgText.OpenGL.text.frag")!;
+            int vs = ShaderUtil.CompileShader(ShaderType.VertexShader, vsource);
+            int fs = ShaderUtil.CompileShader(ShaderType.FragmentShader, fsource);
+            _program = ShaderUtil.LinkProgram(vs, fs, [
+                "a_v3Position",
+                "a_v2TexCoords",
+            ]);
+            GL.DeleteShader(vs);
+            GL.DeleteShader(fs);
+
+            _transformsLocation = GL.GetUniformLocation(_program, "m4Transforms");
+            _atlasLocation = GL.GetUniformLocation(_program, "txAtlas");
+            _borderWidthLocation = GL.GetUniformLocation(_program, "fBorderWidth");
+            _borderColorLocation = GL.GetUniformLocation(_program, "v4BorderColor");
+            _fillColorLocation = GL.GetUniformLocation(_program, "v4FillColor");
+
+            GL.UseProgram(_program);
+            GL.Uniform1i(_atlasLocation, 0);
+        }
+
+        private void UpdateTexture(IntPtr texture, IntPtr buffer, int x, int y, int width, int height)
+        {
+            GL.BindTexture(TextureTarget.Texture2d, (int)texture);
+            GL.TexSubImage2D(TextureTarget.Texture2d, 0, x, y, width, height, OPENGL.PixelFormat.Rgba, PixelType.UnsignedByte, buffer);
+            // GL.TexSubImage2D(TextureTarget.Texture2d, 0, x, y, width, height, OPENGL.PixelFormat.Red, PixelType.Byte, buffer);
+        }
+
+
+        private IntPtr AllocateTexture(int width, int height)
+        {
+            int texture = GL.GenTexture();
+
+            GL.BindTexture(TextureTarget.Texture2d, texture);
+            GL.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.Rgba, width, height, 0, OPENGL.PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
+            // GL.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.R8, width, height, 0, OPENGL.PixelFormat.Red, PixelType.Byte, IntPtr.Zero);
+
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
+            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleR, (int)TextureSwizzle.One);
+            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleG, (int)TextureSwizzle.One);
+            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleB, (int)TextureSwizzle.One);
+            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleA, (int)TextureSwizzle.Red);
+
+            _textures.Add(texture);
+
+            return texture;
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (IsDisposed)
+                return;
+            IsDisposed = true;
+
+            if (disposing)
+            {
+                GC.SuppressFinalize(this);
+                foreach (int texture in _textures)
+                {
+                    Context.Collector.DeleteTexture(texture);
+                }
+            }
+        }
+
+        public override void DrawBlurgResult(BlurgResult result, Vector3 position)
+        {
+            if (result.Count == 0)
+                return;
+
+            Matrix4x4 view = Context.ExtensionRequire<IDeviceContextBase>().Transforms;
+
+            List<DrawCall> drawCalls = new List<DrawCall>();
+            List<Vertex> vertices = new List<Vertex>();
+            List<ushort> indices = new List<ushort>();
+            int offset = 0;
+            int count = 0;
+
+            DrawCall prototype = default;
+            for (int i = 0; i < result.Count; i++)
+            {
+                BlurgRect rect = result[i];
+
+                int texture = (int)rect.UserData;
+                Vector4 fillColor = new Vector4(rect.Color.R / 255f, rect.Color.G / 255f, rect.Color.B / 255f,
+                    rect.Color.A / 255f);
+
+                if (i == 0)
+                {
+                    prototype = new DrawCall(0, 0, texture, fillColor);
+                }
+                else if (prototype.Texture != texture || prototype.FillColor != fillColor)
+                {
+                    drawCalls.Add(prototype with { Count = count, Offset = offset });
+                    prototype = new DrawCall(0, 0, texture, fillColor);
+                    offset += count;
+                    count = 0;
+                }
+
+                vertices.Add(new Vertex(rect.X,              rect.Y, 0,               rect.U0, rect.V0));
+                vertices.Add(new Vertex(rect.X + rect.Width, rect.Y, 0,               rect.U1, rect.V0));
+                vertices.Add(new Vertex(rect.X + rect.Width, rect.Y + rect.Height, 0, rect.U1, rect.V1));
+                vertices.Add(new Vertex(rect.X,              rect.Y + rect.Height, 0, rect.U0, rect.V1));
+
+                indices.Add((ushort)(vertices.Count - 4));
+                indices.Add((ushort)(vertices.Count - 3));
+                indices.Add((ushort)(vertices.Count - 2));
+                indices.Add((ushort)(vertices.Count - 4));
+                indices.Add((ushort)(vertices.Count - 2));
+                indices.Add((ushort)(vertices.Count - 1));
+
+                count += 6;
+            }
+            drawCalls.Add(prototype with { Count = count, Offset = offset });
+
+            if (_vertexArray == 0)
+            {
+                _vertexArray = GL.GenVertexArray();
+            }
+            GL.BindVertexArray(_vertexArray);
+
+            Span<int> buffers = stackalloc int[2];
+            GL.GenBuffers(2, buffers);
+            GL.BindBuffer(BufferTarget.ArrayBuffer, buffers[0]);
+            GL.BufferData(BufferTarget.ArrayBuffer, vertices.Count * Vertex.Size, (ReadOnlySpan<Vertex>)CollectionsMarshal.AsSpan(vertices), BufferUsage.StaticRead);
+
+            GL.BindBuffer(BufferTarget.ElementArrayBuffer, buffers[1]);
+            GL.BufferData(BufferTarget.ElementArrayBuffer, indices.Count * sizeof(ushort), (ReadOnlySpan<ushort>)CollectionsMarshal.AsSpan(indices), BufferUsage.StaticRead);
+
+            GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, Vertex.Size, Vertex.PositionOffset);
+            GL.VertexAttribPointer(1, 2, VertexAttribPointerType.Float, false, Vertex.Size, Vertex.TexCoordOffset);
+            GL.EnableVertexAttribArray(0); GL.EnableVertexAttribArray(1);
+
+            UseProgram();
+
+            GL.UniformMatrix4f(_transformsLocation, 1, true, in view);
+            GL.ActiveTexture(TextureUnit.Texture0);
+
+            foreach (DrawCall call in drawCalls)
+            {
+                GL.BindTexture(TextureTarget.Texture2d, call.Texture);
+                GL.Uniform4f(_fillColorLocation, call.FillColor.X, call.FillColor.Y, call.FillColor.Z,
+                    call.FillColor.W);
+                GL.DrawElements(PrimitiveType.Triangles, call.Count, DrawElementsType.UnsignedShort, call.Offset);
+            }
+
+            GL.DeleteBuffers(2, buffers);
+        }
+
+        public override void Dispose()
+        {
+            Dispose(true);
+        }
+
+        [StructLayout(LayoutKind.Explicit, Size = Size)]
+        private struct Vertex(Vector3 position, Vector2 texCoord)
+        {
+            [FieldOffset(PositionOffset)]
+            public Vector3 Position = position;
+
+            [FieldOffset(TexCoordOffset)]
+            public Vector2 TexCoord = texCoord;
+
+            public Vertex(float x, float y, float z, float u, float v)
+                : this(new Vector3(x, y, z), new Vector2(u, v))
+            {
+            }
+
+            public const int Size = 8 * sizeof(float);
+            public const int PositionOffset = 0 * sizeof(float);
+            public const int TexCoordOffset = 4 * sizeof(float);
+        }
+
+        private struct DrawCall(int offset, int count, int texture, Vector4 fillColor)
+        {
+            public int Offset = offset;
+            public int Count = count;
+            public int Texture = texture;
+            public Vector4 FillColor = fillColor;
+        }
+    }
+}

Dashboard.BlurgText.OpenGL/Dashboard.BlurgText.OpenGL.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <LangVersion>latest</LangVersion>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="../Dashboard.BlurgText/Dashboard.BlurgText.csproj"/>
+        <ProjectReference Include="..\Dashboard.OpenGL\Dashboard.OpenGL.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <EmbeddedResource Include="text.frag" />
+      <EmbeddedResource Include="text.vert" />
+    </ItemGroup>
+
+</Project>

Dashboard.BlurgText.OpenGL/text.frag

@@ -0,0 +1,21 @@
+#version 140
+
+in vec3 v_v3Position;
+in vec2 v_v2TexCoords;
+
+out vec4 f_Color;
+
+uniform sampler2D txAtlas;
+uniform float fBorderWidth;
+uniform vec4 v4BorderColor;
+uniform vec4 v4FillColor;
+
+void main() {
+    // For now just honor the fill color
+
+    vec4 color = texture(txAtlas, v_v2TexCoords) * v4FillColor;
+
+    if (color.a <= 0.01)
+        discard;
+    f_Color = color;
+}

Dashboard.BlurgText.OpenGL/text.vert

@@ -0,0 +1,18 @@
+#version 140
+
+in vec3 a_v3Position;
+in vec2 a_v2TexCoords;
+
+out vec3 v_v3Position;
+out vec2 v_v2TexCoords;
+
+uniform mat4 m4Transforms;
+
+void main(void)
+{
+    vec4 position = vec4(a_v3Position, 1) * m4Transforms;
+    gl_Position = position;
+    v_v3Position = position.xyz/position.w;
+
+    v_v2TexCoords = a_v2TexCoords;
+}

Dashboard.BlurgText/BlurgFontProxy.cs

@@ -0,0 +1,21 @@
+using BlurgText;
+using Dashboard.Drawing;
+
+namespace Dashboard.BlurgText
+{
+    public class BlurgFontProxy(Blurg owner, BlurgFont font) : IFont
+    {
+        public Blurg Owner { get; } = owner;
+        public BlurgFont Font { get; } = font;
+        public string Family => Font.FamilyName;
+        public FontWeight Weight => (FontWeight)Font.Weight.Value;
+        public FontSlant Slant => Font.Italic ? FontSlant.Italic : FontSlant.Normal;
+        public FontStretch Stretch => FontStretch.Normal;
+
+        public string? Path { get; init; }
+
+        public void Dispose()
+        {
+        }
+    }
+}

Dashboard.BlurgText/BlurgTextExtension.cs

@@ -0,0 +1,210 @@
+using System.Diagnostics;
+using System.Numerics;
+using BlurgText;
+using Dashboard.Drawing;
+using Dashboard.Pal;
+
+namespace Dashboard.BlurgText
+{
+    public interface IBlurgDcExtensionFactory
+    {
+        public BlurgDcExtension CreateExtension(BlurgTextExtension appExtension, DeviceContext dc);
+    }
+
+    public class BlurgTextExtension(IBlurgDcExtensionFactory dcExtensionFactory) : IFontLoader
+    {
+        private readonly Blurg _blurg = new Blurg(GlobalTextureAllocation, GlobalTextureUpdate);
+
+        public Application Context { get; private set; } = null!;
+        public string DriverName { get; } = "BlurgText";
+        public string DriverVendor { get; } = "Dashbord and BlurgText";
+        public Version DriverVersion { get; } = new Version(1, 0);
+        public IBlurgDcExtensionFactory DcExtensionFactory { get; } = dcExtensionFactory;
+        IContextBase IContextExtensionBase.Context => Context;
+        public bool IsDisposed { get; private set; } = false;
+
+        public void Require(Application context)
+        {
+            Context = context;
+            context.DeviceContextCreated += OnDeviceContextCreated;
+            _blurg.EnableSystemFonts();
+        }
+
+        void IContextExtensionBase.Require(IContextBase context) => Require((Application)context);
+
+        private void RequireDeviceContextExtension(DeviceContext dc)
+        {
+            dc.ExtensionPreload<BlurgDcExtension>(() => DcExtensionFactory.CreateExtension(this, dc));
+        }
+
+        private void OnDeviceContextCreated(object? sender, DeviceContext dc)
+        {
+            RequireDeviceContextExtension(dc);
+        }
+
+        public void Dispose()
+        {
+            if (IsDisposed)
+                return;
+            IsDisposed = true;
+
+            _blurg.Dispose();
+            Context.DeviceContextCreated -= OnDeviceContextCreated;
+        }
+
+        private static void GlobalTextureUpdate(IntPtr userdata, IntPtr buffer, int x, int y, int width, int height)
+        {
+            // Report the user error.
+            Debug.WriteLine("Attempt to create or update a texture from the global BlurgText.", "Dashboard/BlurgEngine");
+        }
+
+        private static IntPtr GlobalTextureAllocation(int width, int height)
+        {
+            Debug.WriteLine("Attempt to create or update  a texture from the global BlurgText.", "Dashboard/BlurgEngine");
+            return IntPtr.Zero;
+        }
+
+        public IFont Load(FontInfo info)
+        {
+            BlurgFont? font = _blurg.QueryFont(
+                info.Family,
+                info.Weight switch
+                {
+                    FontWeight._100 => global::BlurgText.FontWeight.Thin,
+                    FontWeight._200 => global::BlurgText.FontWeight.ExtraLight,
+                    FontWeight._300 => global::BlurgText.FontWeight.Light,
+                    FontWeight._500 => global::BlurgText.FontWeight.Medium,
+                    FontWeight._600 => global::BlurgText.FontWeight.SemiBold,
+                    FontWeight._700 => global::BlurgText.FontWeight.Bold,
+                    FontWeight._800 => global::BlurgText.FontWeight.ExtraBold,
+                    FontWeight._900 => global::BlurgText.FontWeight.Black,
+                    _ => global::BlurgText.FontWeight.Regular,
+                },
+                info.Slant switch
+                {
+                    FontSlant.Oblique or FontSlant.Italic => true,
+                    _ => false,
+                });
+
+            if (font == null)
+                throw new Exception("Font not found.");
+
+            return new BlurgFontProxy(_blurg, font);
+        }
+
+        public IFont Load(string path)
+        {
+            BlurgFont? font = _blurg.AddFontFile(path);
+
+            if (font == null)
+                throw new Exception("Font not found.");
+
+            return new BlurgFontProxy(_blurg, font);
+        }
+
+        public IFont Load(Stream stream)
+        {
+            string path;
+            Stream dest;
+            for (int i = 0;; i++)
+            {
+                path = Path.GetTempFileName();
+                try
+                {
+                    dest = File.Open(path, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
+                }
+                catch (IOException ex)
+                {
+                    if (i < 3)
+                        continue;
+                    else
+                        throw new Exception("Could not open a temporary file for writing the font.", ex);
+                }
+
+                break;
+            }
+
+            stream.CopyTo(dest);
+            dest.Dispose();
+
+            return Load(path);
+        }
+    }
+
+    public abstract class BlurgDcExtension : IDeviceContextExtension, ITextRenderer
+    {
+        public abstract Blurg Blurg { get; }
+        public abstract string DriverName { get; }
+        public abstract string DriverVendor { get; }
+        public abstract Version DriverVersion { get; }
+
+        public Application Application => Context.Application;
+        public DeviceContext Context { get; private set; } = null!;
+
+        public abstract void DrawBlurgResult(BlurgResult result, Vector3 position);
+
+        public void DrawBlurgFormattedText(BlurgFormattedText text, Vector3 position, float width = 0f)
+        {
+            BlurgResult? result = Blurg.BuildFormattedText(text, maxWidth: width);
+            if (result == null)
+                throw new Exception("Could not build formatted text result.");
+
+            DrawBlurgResult(result, position);
+        }
+
+        protected BlurgFontProxy InternFont(IFont font)
+        {
+            BlurgTextExtension appExtension = Application.ExtensionRequire<BlurgTextExtension>();
+            if (font is FontInfo fontInfo)
+            {
+                return (BlurgFontProxy)appExtension.Load(fontInfo);
+            }
+            else if (font is BlurgFontProxy blurgFont)
+            {
+                if (blurgFont.Owner != Blurg)
+                {
+                    if (blurgFont.Path == null)
+                        return (BlurgFontProxy)appExtension.Load(new FontInfo(blurgFont.Family, blurgFont.Weight,
+                            blurgFont.Slant,
+                            blurgFont.Stretch));
+                    else
+                        return (BlurgFontProxy)appExtension.Load(blurgFont.Path);
+                }
+                else
+                {
+                    return blurgFont;
+                }
+            }
+            else
+            {
+                throw new Exception("Unsupported font resource.");
+            }
+        }
+
+        public abstract void Dispose();
+
+        IContextBase IContextExtensionBase.Context => Context;
+
+        public void Require(DeviceContext context)
+        {
+            Context = context;
+        }
+
+        void IContextExtensionBase.Require(IContextBase context) => Require((DeviceContext)context);
+
+        public Box2d MeasureText(IFont font, float size, string text)
+        {
+            BlurgFontProxy proxy = InternFont(font);
+            Vector2 sz = Blurg.MeasureString(proxy.Font, size * Context.ExtensionRequire<IDeviceContextBase>().Scale, text);
+            return new Box2d(0, 0, sz.X, sz.Y);
+        }
+
+        public void DrawText(Vector2 position, Vector4 color, float size, IFont font, string text)
+        {
+            BlurgFontProxy proxy = InternFont(font);
+            BlurgResult? result = Blurg.BuildString(proxy.Font, size * Context.ExtensionRequire<IDeviceContextBase>().Scale,
+                new BlurgColor((byte)(color.X * 255), (byte)(color.Y * 255), (byte)(color.Z * 255), (byte)(color.W * 255)), text);
+            DrawBlurgResult(result, new Vector3(position, 0));
+        }
+    }
+}

Dashboard.BlurgText/Dashboard.BlurgText.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <LangVersion>latest</LangVersion>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="BlurgText" Version="0.1.0-nightly-19" />
+      <ProjectReference Include="..\Dashboard.Common\Dashboard.Common.csproj" />
+    </ItemGroup>
+
+</Project>

Dashboard.Common/Collections/TypeDictionary.cs

@@ -0,0 +1,157 @@
+using System.Collections;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Dashboard.Collections
+{
+    public class TypeDictionary<T>(bool hierarchical = false) : IEnumerable<T>
+    {
+        private readonly Dictionary<int, T> _objects = new Dictionary<int, T>();
+
+        public bool Contains<T2>() where T2 : T => _objects.ContainsKey(TypeAtom<T2>.Id);
+
+        public bool Add<T2>(T2 value) where T2 : T
+        {
+            TypeAtom atom = TypeAtom<T2>.Atom;
+
+            if (!_objects.TryAdd(atom.Id, value))
+                return false;
+
+            if (!hierarchical)
+                return true;
+
+            foreach (TypeAtom ancestor in atom.Ancestors)
+            {
+                _objects[ancestor.Id] = value;
+            }
+
+            return true;
+        }
+
+        public T2 Get<T2>() where T2 : T => TryGet(out T2? value) ? value : throw new KeyNotFoundException();
+
+        public void Set<T2>(T2 value) where T2 : T
+        {
+            TypeAtom atom = TypeAtom<T2>.Atom;
+            _objects[atom.Id] = value;
+
+            if (!hierarchical)
+                return;
+
+            foreach (TypeAtom ancestor in atom.Ancestors)
+            {
+                _objects[ancestor.Id] = value;
+            }
+        }
+
+        public bool Remove<T2>() where T2 : T => Remove<T>(out _);
+
+        public bool Remove<T2>([NotNullWhen(true)] out T2? value) where T2 : T
+        {
+            TypeAtom atom = TypeAtom<T2>.Atom;
+
+            if (!_objects.Remove(atom.Id, out T? subValue))
+            {
+                value = default;
+                return false;
+            }
+
+            value = (T2?)subValue;
+
+            if (hierarchical)
+            {
+                foreach (TypeAtom ancestor in atom.Ancestors)
+                {
+                    _objects.Remove(ancestor.Id);
+                }
+            }
+
+            return value != null;
+        }
+
+        public bool TryGet<T2>([NotNullWhen(true)] out T2? value) where T2 : T
+        {
+            if (!_objects.TryGetValue(TypeAtom<T2>.Id, out T? subValue))
+            {
+                value = default;
+                return false;
+            }
+
+            value = (T2?)subValue;
+            return value != null;
+        }
+
+        public void Clear() => _objects.Clear();
+
+        public IEnumerator<T> GetEnumerator() => _objects.Values.Distinct().GetEnumerator();
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+    }
+
+    public class TypeDictionary<TKey, TValue>(bool hierarchical = false) : IEnumerable<KeyValuePair<TypeAtom, TValue>>
+    {
+        private readonly Dictionary<int, TValue> _objects = new Dictionary<int, TValue>();
+
+        public bool Contains<TKey2>() where TKey2 : TKey => _objects.ContainsKey(TypeAtom<TKey2>.Id);
+
+        public bool Add<TKey2>(TValue value) where TKey2 : TKey
+        {
+            TypeAtom atom = TypeAtom<TKey2>.Atom;
+
+            if (!_objects.TryAdd(atom.Id, value))
+                return false;
+
+            if (!hierarchical)
+                return true;
+
+            foreach (TypeAtom ancestor in atom.Ancestors)
+            {
+                _objects[ancestor.Id] = value;
+            }
+
+            return true;
+        }
+
+        public TValue Get<TKey2>() where TKey2 : TKey => (TValue)_objects[TypeAtom<TKey2>.Id]!;
+
+        public void Set<TKey2>(TValue value) where TKey2 : TKey
+        {
+            TypeAtom atom = TypeAtom<TKey2>.Atom;
+            _objects[atom.Id] = value;
+
+            if (!hierarchical)
+                return;
+
+            foreach (TypeAtom ancestor in atom.Ancestors)
+            {
+                _objects[ancestor.Id] = value;
+            }
+        }
+
+        public bool Remove<TKey2>() where TKey2 : TKey => Remove<TKey2>(out _);
+        public bool Remove<TKey2>([MaybeNullWhen(false)] out TValue? value) where TKey2 : TKey
+        {
+            TypeAtom atom = TypeAtom<TKey2>.Atom;
+
+            if (!_objects.Remove(atom.Id, out value))
+            {
+                return false;
+            }
+
+            if (hierarchical)
+            {
+                foreach (TypeAtom ancestor in atom.Ancestors)
+                {
+                    _objects.Remove(ancestor.Id);
+                }
+            }
+
+            return true;
+        }
+
+        public bool TryGet<TKey2>([NotNullWhen(true)] out TValue? value) where TKey2 : TKey => _objects.TryGetValue(TypeAtom<TKey2>.Id, out value);
+
+        public void Clear() => _objects.Clear();
+
+        public IEnumerator<KeyValuePair<TypeAtom, TValue>> GetEnumerator() => _objects.Select(x => new KeyValuePair<TypeAtom, TValue>(TypeAtom.Get(x.Key)!, x.Value)).GetEnumerator();
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+    }
+}

Dashboard.Common/Drawing/Brush.cs

@@ -0,0 +1,25 @@
+using System.Drawing;
+using System.Numerics;
+
+namespace Dashboard.Drawing
+{
+    public abstract class Brush
+    {
+    }
+
+    public class SolidColorBrush(Color color) : Brush
+    {
+        public Color Color { get; } = color;
+    }
+
+    public class ImageBrush(Image image) : Brush
+    {
+        public Box2d TextureCoordinates { get; set; } = new Box2d(0, 0, 1, 1);
+    }
+
+    public class NinePatchImageBrush(Image image) : Brush
+    {
+        public Box2d CenterCoordinates { get; set; } = new Box2d(0, 0, 1, 1);
+        public Vector4 Extents { get; set; } = Vector4.Zero;
+    }
+}

Dashboard.Common/Drawing/Font.cs

@@ -0,0 +1,42 @@
+using System;
+using System.IO;
+using System.Net.Mime;
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+    public class Font(IFont iFont) : IFont
+    {
+        public IFont Base => iFont;
+        public string Family => iFont.Family;
+        public FontWeight Weight => iFont.Weight;
+        public FontSlant Slant => iFont.Slant;
+        public FontStretch Stretch => iFont.Stretch;
+
+        public void Dispose()
+        {
+            iFont.Dispose();
+        }
+
+        public static Font Create(Stream stream)
+        {
+            IFont iFont = Application.Current.ExtensionRequire<IFontLoader>().Load(stream);
+
+            return new Font(iFont);
+        }
+
+        public static Font Create(FontInfo info)
+        {
+            IFont iFont = Application.Current.ExtensionRequire<IFontLoader>().Load(info);
+
+            return new Font(iFont);
+        }
+
+        public static Font Create(string path)
+        {
+            IFont iFont = Application.Current.ExtensionRequire<IFontLoader>().Load(path);
+
+            return new Font(iFont);
+        }
+    }
+}

Dashboard.Common/Drawing/IDeviceContextBase.cs

@@ -0,0 +1,33 @@
+using System.Drawing;
+using System.Numerics;
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+    public interface IDeviceContextBase : IDeviceContextExtension
+    {
+        Box2d ClipRegion { get; }
+        Box2d ScissorRegion { get; }
+        Matrix4x4 Transforms { get; }
+        float Scale { get; }
+        float ScaleOverride { get; set; }
+
+        void ResetClip();
+        void PushClip(Box2d clipRegion);
+        void PopClip();
+
+        void ResetScissor();
+        void PushScissor(Box2d scissorRegion);
+        void PopScissor();
+
+        void ResetTransforms();
+        void PushTransforms(in Matrix4x4 matrix);
+        void PopTransforms();
+
+        void ClearColor(Color color);
+        void ClearDepth();
+
+        int IncrementZ();
+        int DecrementZ();
+    }
+}

Dashboard.Common/Drawing/IFontLoader.cs

@@ -0,0 +1,27 @@
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+    public interface IFont : IDisposable
+    {
+        string Family { get; }
+        FontWeight Weight { get; }
+        FontSlant Slant { get; }
+        FontStretch Stretch { get; }
+    }
+
+    public record struct FontInfo(string Family, FontWeight Weight = FontWeight.Normal,
+        FontSlant Slant = FontSlant.Normal, FontStretch Stretch = FontStretch.Normal) : IFont
+    {
+        public void Dispose()
+        {
+        }
+    }
+
+    public interface IFontLoader : IApplicationExtension
+    {
+        IFont Load(FontInfo info);
+        IFont Load(string path);
+        IFont Load(Stream stream);
+    }
+}

Dashboard.Common/Drawing/IImageLoader.cs

@@ -0,0 +1,61 @@
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+    public record ImageData(
+        TextureType Type,
+        PixelFormat Format,
+        int Width,
+        int Height,
+        byte[] Bitmap)
+    {
+        public int Depth { get; init; } = 1;
+        public int Levels { get; init; } = 1;
+        public bool Premultiplied { get; init; } = false;
+        public int Alignment { get; init; } = 4;
+
+        public long GetLevelOffset(int level)
+        {
+            ArgumentOutOfRangeException.ThrowIfLessThan(level, 0, nameof(level));
+            ArgumentOutOfRangeException.ThrowIfGreaterThan(level, Levels, nameof(level));
+            ArgumentOutOfRangeException.ThrowIfGreaterThan(level, Math.ILogB(Math.Max(Width, Height)));
+
+            long offset = 0;
+
+            long row = Width * Format switch
+            {
+                PixelFormat.R8I => 1,
+                PixelFormat.R16F => 2,
+                PixelFormat.Rg8I => 2,
+                PixelFormat.Rg16F => 4,
+                PixelFormat.Rgb8I => 3,
+                PixelFormat.Rgb16F => 6,
+                PixelFormat.Rgba8I => 4,
+                PixelFormat.Rgba16F => 8,
+            };
+
+            row += Alignment - (row % Alignment);
+            long plane = row * Height;
+            long volume = plane * Depth;
+
+            for (int i = 0; i < level; i++)
+            {
+                if (Depth == 1)
+                {
+                    offset += plane / (1 << i) / (1 << i);
+                }
+                else
+                {
+                    offset += volume / (1 << i) / (1 << i) / (1 << i);
+                }
+            }
+
+            return offset;
+        }
+    }
+
+    public interface IImageLoader : IApplicationExtension
+    {
+        public ImageData LoadImageData(Stream stream);
+    }
+}

Dashboard.Common/Drawing/IImmediateMode.cs

@@ -0,0 +1,17 @@
+using System.Drawing;
+using System.Numerics;
+using Dashboard.Layout;
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+    public record struct RectangleDrawInfo(Vector2 Position, ComputedBox Box, Brush Fill, Brush? Border = null);
+
+    public interface IImmediateMode : IDeviceContextExtension
+    {
+        void Line(Vector2 a, Vector2 b, float width, float depth, Vector4 color);
+        void Rectangle(Box2d rectangle, float depth, Vector4 color);
+        void Rectangle(in RectangleDrawInfo rectangle);
+        void Image(Box2d rectangle, Box2d uv, float depth, ITexture texture);
+    }
+}

Dashboard.Common/Drawing/ITextRenderer.cs

@@ -0,0 +1,12 @@
+using System.Numerics;
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+
+    public interface ITextRenderer : IDeviceContextExtension
+    {
+        Box2d MeasureText(IFont font, float size, string text);
+        void DrawText(Vector2 position, Vector4 color, float size, IFont font, string text);
+    }
+}

Dashboard.Common/Drawing/ITextureExtension.cs

@@ -0,0 +1,84 @@
+using System.Drawing;
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+    public interface ITextureExtension : IDeviceContextExtension
+    {
+        ITexture CreateTexture(TextureType type);
+    }
+
+    public enum TextureType
+    {
+        Texture1D,
+        Texture2D,
+        Texture2DArray,
+        Texture2DCube,
+        Texture3D,
+    }
+
+    public enum TextureFilter
+    {
+        Nearest,
+        Linear,
+        NearestMipmapNearest,
+        LinearMipmapNearest,
+        NearestMipmapLinear,
+        LinearMipmapLinear,
+        Anisotropic,
+    }
+
+    public enum TextureRepeat
+    {
+        Repeat,
+        MirroredRepeat,
+        ClampToEdge,
+        ClampToBorder,
+        MirrorClampToEdge,
+    }
+
+    public enum CubeMapFace
+    {
+        PositiveX,
+        PositiveY,
+        PositiveZ,
+        NegativeX,
+        NegativeY,
+        NegativeZ,
+    }
+
+    public interface ITexture : IDisposable
+    {
+        public TextureType Type { get; }
+        public PixelFormat Format { get; }
+
+        public int Width { get; }
+        public int Height { get; }
+        public int Depth { get; }
+        public int Levels { get; }
+
+        public bool Premultiplied { get; set; }
+
+        public ColorSwizzle Swizzle { get; set; }
+
+        public TextureFilter MinifyFilter { get; set; }
+
+        public TextureFilter MagnifyFilter { get; set; }
+
+        public Color BorderColor { get; set; }
+
+        public TextureRepeat RepeatS { get; set; }
+
+        public TextureRepeat RepeatT { get; set; }
+
+        public TextureRepeat RepeatR { get; set; }
+        public int Anisotropy { get; set; }
+
+        void SetStorage(PixelFormat format, int width, int height, int depth, int levels);
+        void Read<T>(Span<T> buffer, int level = 0, int align = 0) where T : unmanaged;
+        void Write<T>(PixelFormat format, ReadOnlySpan<T> buffer, int level = 0, int align = 4) where T : unmanaged;
+        void Premultiply();
+        void Unmultiply();
+        void GenerateMipmaps();
+    }
+}

Dashboard.Common/Drawing/Image.cs

@@ -0,0 +1,72 @@
+using System;
+using System.IO;
+using System.Runtime.CompilerServices;
+using Dashboard.Pal;
+
+namespace Dashboard.Drawing
+{
+    public class Image(ImageData data) : IDisposable
+    {
+        protected readonly ConditionalWeakTable<DeviceContext, ITexture> Textures =
+            new ConditionalWeakTable<DeviceContext, ITexture>();
+
+        public virtual TextureType Type => data.Type;
+        public PixelFormat Format { get; } = data.Format;
+        public int Width { get; } = data.Width;
+        public int Height { get; } = data.Height;
+        public int Depth { get; } = data.Depth;
+        public int Levels { get; } = data.Levels;
+        public bool Premultiplied { get; } = data.Premultiplied;
+
+        public bool IsDisposed { get; private set; } = false;
+
+        ~Image()
+        {
+            InvokeDispose(false);
+        }
+
+        public virtual ITexture InternTexture(DeviceContext dc)
+        {
+            if (Textures.TryGetValue(dc, out ITexture? texture))
+                return texture;
+
+            ITextureExtension ext = dc.ExtensionRequire<ITextureExtension>();
+            texture = ext.CreateTexture(Type);
+            texture.SetStorage(Format, Width, Height, Depth, Levels);
+            for (int i = 0; i < Levels; i++)
+            {
+                texture.Write<byte>(Format, data.Bitmap.AsSpan()[(int)data.GetLevelOffset(i)..], level: i, align: data.Alignment);
+            }
+            texture.Premultiplied = Premultiplied;
+            texture.GenerateMipmaps();
+            Textures.Add(dc, texture);
+
+            return texture;
+        }
+
+        private void InvokeDispose(bool disposing)
+        {
+            if (IsDisposed)
+                return;
+            IsDisposed = true;
+
+            Dispose(disposing);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            foreach ((DeviceContext dc, ITexture texture) in Textures)
+            {
+                texture.Dispose();
+            }
+        }
+
+        public void Dispose() => InvokeDispose(true);
+
+        public static Image Load(Stream stream)
+        {
+            IImageLoader imageLoader = Application.Current.ExtensionRequire<IImageLoader>();
+            return new Image(imageLoader.LoadImageData(stream));
+        }
+    }
+}

Dashboard.Common/Events/AnimationTickEventArgs.cs

@@ -1,20 +0,0 @@
-namespace Dashboard.Events
-{
-    public class AnimationTickEventArgs : UiEventArgs
-    {
-        /// <summary>
-        /// Animation delta time in seconds.
-        /// </summary>
-        public float Delta { get; }
-
-        public AnimationTickEventArgs(float delta) : base(UiEventType.AnimationTick)
-        {
-            Delta = delta;
-        }
-    }
-
-    public interface IAnimationTickEvent
-    {
-        event EventHandler<AnimationTickEventArgs> AnimationTimerEvent;
-    }
-}

Dashboard.Common/Events/KeyboardEvents.cs

@@ -0,0 +1,59 @@
+namespace Dashboard.Events
+{
+    [Flags]
+    public enum ModifierKeys
+    {
+        None = 0,
+        LeftBitPos  = 8,
+        RightBitPos = 16,
+
+        Shift   = (1 << 0),
+        Control = (1 << 1),
+        Alt     = (1 << 2),
+        Meta    = (1 << 3),
+
+        NumLock    = (1 << 4),
+        CapsLock   = (1 << 5),
+        ScrollLock = (1 << 6),
+
+        LeftShift    = (Shift   << LeftBitPos),
+        LeftControl  = (Control << LeftBitPos),
+        LeftAlt      = (Alt     << LeftBitPos),
+        LeftMeta     = (Meta    << LeftBitPos),
+
+        RightShift   = (Shift   << RightBitPos),
+        RightControl = (Control << RightBitPos),
+        RightAlt     = (Alt     << RightBitPos),
+        RightMeta    = (Meta    << RightBitPos),
+    }
+
+    public enum KeyCode
+    {
+        // TODO:
+    }
+
+    public enum ScanCode
+    {
+        // TODO:
+    }
+
+    public class KeyboardButtonEventArgs(KeyCode keyCode, ScanCode scanCode, ModifierKeys modifierKeys, bool up)
+        : UiEventArgs(up ? UiEventType.KeyUp : UiEventType.KeyDown)
+    {
+        public KeyCode KeyCode { get; } = keyCode;
+        public ScanCode ScanCode { get; } = scanCode;
+        public ModifierKeys ModifierKeys { get; } = modifierKeys;
+    }
+
+    public class TextInputEventArgs(string text) : UiEventArgs(UiEventType.TextEdit)
+    {
+        public string Text { get; } = text;
+    }
+
+    public class TextEditEventArgs(string candidate, int cursor, int length) : UiEventArgs(UiEventType.TextEdit)
+    {
+        public string Candidate { get; } = candidate;
+        public int Cursor { get; } = cursor;
+        public int Length { get; } = length;
+    }
+}

Dashboard.Common/Events/MouseEvents.cs

@@ -20,50 +20,24 @@ namespace Dashboard.Events
         Middle = M3,
     }
 
-    public sealed class MouseMoveEventArgs : UiEventArgs
+    public sealed class MouseMoveEventArgs(Vector2 clientPosition, Vector2 delta) : UiEventArgs(UiEventType.MouseMove)
     {
-        public Vector2 ClientPosition { get; }
+        public Vector2 ClientPosition { get; } = clientPosition;
-        public Vector2 Delta { get; }
+        public Vector2 Delta { get; } = delta;
-
-        public MouseMoveEventArgs(Vector2 clientPosition, Vector2 delta)
-            : base(UiEventType.MouseMove)
-        {
-            ClientPosition = clientPosition;
-            Delta = delta;
-        }
     }
 
-    public sealed class MouseButtonEventArgs : UiEventArgs
+    public sealed class MouseButtonEventArgs(Vector2 clientPosition, MouseButtons buttons, ModifierKeys modifierKeys, bool up)
+        : UiEventArgs(up ? UiEventType.MouseButtonUp : UiEventType.MouseButtonDown)
     {
-        public Vector2 ClientPosition { get; }
+        public ModifierKeys ModifierKeys { get; } = modifierKeys;
-        public MouseButtons Buttons { get; }
+        public Vector2 ClientPosition { get; } = clientPosition;
-
+        public MouseButtons Buttons { get; } = buttons;
-        public MouseButtonEventArgs(Vector2 clientPosition, MouseButtons buttons, bool up)
-            : base(up ? UiEventType.MouseButtonUp : UiEventType.MouseButtonDown)
-        {
-            ClientPosition = clientPosition;
-            Buttons = buttons;
-        }
     }
 
-    public sealed class MouseScrollEventArgs : UiEventArgs
+    public sealed class MouseScrollEventArgs(Vector2 clientPosition, Vector2 scrollDelta)
+        : UiEventArgs(UiEventType.MouseScroll)
     {
-        public Vector2 ClientPosition { get; }
+        public Vector2 ClientPosition { get; } = clientPosition;
-        public Vector2 ScrollDelta { get; }
+        public Vector2 ScrollDelta { get; } = scrollDelta;
-
-        public MouseScrollEventArgs(Vector2 clientPosition, Vector2 scrollDelta)
-            : base(UiEventType.MouseScroll)
-        {
-            ClientPosition = clientPosition;
-            ScrollDelta = scrollDelta;
-        }
-    }
-
-    public interface IMouseEvents
-    {
-        event EventHandler<MouseMoveEventArgs> MouseMoved;
-        event EventHandler<MouseButtonEventArgs> MouseButtonDown;
-        event EventHandler<MouseButtonEventArgs> MouseButtonUp;
-        event EventHandler<MouseScrollEventArgs> MouseScroll;
     }
 }

Dashboard.Common/Events/TickEventArgs.cs

@@ -0,0 +1,15 @@
+namespace Dashboard.Events
+{
+    public class TickEventArgs : UiEventArgs
+    {
+        /// <summary>
+        /// Animation delta time in seconds.
+        /// </summary>
+        public float Delta { get; }
+
+        public TickEventArgs(float delta) : base(UiEventType.AnimationTick)
+        {
+            Delta = delta;
+        }
+    }
+}

Dashboard.Common/Events/UiEventArgs.cs

@@ -1,4 +1,5 @@
 using System.Numerics;
+using Dashboard.Pal;
 
 namespace Dashboard.Events
 {
@@ -6,6 +7,7 @@ namespace Dashboard.Events
     {
         None,
         AnimationTick,                  // Generic timer event.
+        Paint,                          // Generic paint event.
 
         // Text input related events.
         KeyDown,                        // Keyboard key down.
@@ -57,6 +59,11 @@ namespace Dashboard.Events
         public static readonly UiEventArgs None = new UiEventArgs(UiEventType.None);
     }
 
+    public class PaintEventArgs(DeviceContext dc) : UiEventArgs(UiEventType.Paint)
+    {
+        public DeviceContext DeviceContext { get; } = dc;
+    }
+
     public class ControlMovedEventArgs : UiEventArgs
     {
         public Vector2 OldPosition { get; }
@@ -69,8 +76,7 @@ namespace Dashboard.Events
         }
     }
 
-    public class ControlResizedEventArgs
+    public class ResizeEventArgs() : UiEventArgs(UiEventType.ControlResized)
     {
-        
     }
 }

Dashboard.Common/Events/WindowEvent.cs

@@ -0,0 +1,7 @@
+namespace Dashboard.Events
+{
+    public class WindowCloseEvent() : UiEventArgs(UiEventType.WindowClose)
+    {
+        public bool Cancel { get; set; } = false;
+    }
+}

Dashboard.Common/FontProperties.cs

@@ -8,6 +8,7 @@ namespace Dashboard
         _400 = 400,
         _500 = 500,
         _600 = 600,
+        _700 = 700,
         _800 = 800,
         _900 = 900,
 

Dashboard.Common/ImageProperties.cs

@@ -6,16 +6,31 @@ namespace Dashboard
     /// <summary>
     /// Pixel format for images.
     /// </summary>
+    [Flags]
     public enum PixelFormat
     {
-        R8I,
+        None = 0,
-        Rg8I,
+
-        Rgb8I,
+        R8I     = R    | I8,
-        Rgba8I,
+        Rg8I    = Rg   | I8,
-        R16F,
+        Rgb8I   = Rgb  | I8,
-        Rg816F,
+        Rgba8I  = Rgba | I8,
-        Rgb16F,
+        R16F    = R    | F16,
-        Rgba16F,
+        Rg16F   = Rg   | F16,
+        Rgb16F  = Rgb  | F16,
+        Rgba16F = Rgba | F16,
+
+        // Channels
+        R    = 0x01,
+        Rg   = 0x02,
+        Rgb  = 0x03,
+        Rgba = 0x04,
+        A    = 0x05,
+        ColorMask = 0x0F,
+
+        I8  = 0x10,
+        F16 = 0x20,
+        TypeMask = 0xF0,
     }
 
     /// <summary>

Dashboard.Common/Layout/ILayoutItem.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel;
+using System.Numerics;
+
+namespace Dashboard.Layout
+{
+    public interface ILayoutItem : INotifyPropertyChanged
+    {
+        public LayoutInfo Layout { get; }
+
+        public Vector2 CalculateIntrinsicSize();
+        public Vector2 CalculateSize(Vector2 limits);
+    }
+
+    public interface ILayoutContainer : ILayoutItem, IEnumerable<ILayoutItem>
+    {
+        public ContainerLayoutInfo ContainerLayout { get; }
+    }
+}

Dashboard.Common/Layout/LayoutBox.cs

@@ -0,0 +1,435 @@
+using System.ComponentModel;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+namespace Dashboard.Layout
+{
+    public readonly record struct ComputedBox(Vector4 Margin, Vector4 Padding, Vector4 Border, Vector2 Size)
+    {
+        public float MarginLeft => Margin.X;
+        public float MarginTop => Margin.Y;
+        public float MarginRight => Margin.Z;
+        public float MarginBottom => Margin.W;
+
+        public float PaddingLeft => Padding.X;
+        public float PaddingTop => Padding.Y;
+        public float PaddingRight => Padding.Z;
+        public float PaddingBottom => Padding.W;
+
+        public float BorderLeft => Border.X;
+        public float BorderTop => Border.Y;
+        public float BorderRight => Border.Z;
+        public float BorderBottom => Border.W;
+
+        public float Width => Size.X;
+        public float Height => Size.Y;
+
+        public Vector2 BoundingSize => new Vector2(
+            MarginLeft + BorderLeft + Width + BorderRight + MarginRight,
+            MarginTop + BorderTop + Height + BorderBottom + MarginBottom);
+
+        public Vector2 ContentSize => new Vector2(
+            Width - PaddingLeft - PaddingRight,
+            Height - PaddingTop - PaddingBottom);
+
+        public Vector4 ContentExtents => new Vector4(
+            PaddingLeft,
+            PaddingTop,
+            PaddingLeft + PaddingRight + Width,
+            PaddingTop + PaddingBottom + Height);
+
+        public Vector4 CornerRadii { get; init; } = Vector4.Zero;
+    }
+
+    public class LayoutBox : INotifyPropertyChanged
+    {
+        private Vector4 _margin = Vector4.Zero;
+        private Vector4 _padding = Vector4.Zero;
+        private Vector4 _border = Vector4.Zero;
+        private Vector2 _size = Vector2.Zero;
+        private Vector2 _minimumSize = -Vector2.One;
+        private Vector2 _maximumSize = -Vector2.One;
+        private Vector4 _cornerRadii = Vector4.Zero;
+
+        private LayoutUnit _marginLeftUnit = LayoutUnit.Pixel;
+        private LayoutUnit _marginTopUnit = LayoutUnit.Pixel;
+        private LayoutUnit _marginRightUnit = LayoutUnit.Pixel;
+        private LayoutUnit _marginBottomUnit = LayoutUnit.Pixel;
+
+        private LayoutUnit _paddingLeftUnit = LayoutUnit.Pixel;
+        private LayoutUnit _paddingTopUnit = LayoutUnit.Pixel;
+        private LayoutUnit _paddingRightUnit = LayoutUnit.Pixel;
+        private LayoutUnit _paddingBottomUnit = LayoutUnit.Pixel;
+
+        private LayoutUnit _borderLeftUnit = LayoutUnit.Pixel;
+        private LayoutUnit _borderTopUnit = LayoutUnit.Pixel;
+        private LayoutUnit _borderRightUnit = LayoutUnit.Pixel;
+        private LayoutUnit _borderBottomUnit = LayoutUnit.Pixel;
+
+        private LayoutUnit _widthUnit = LayoutUnit.Pixel;
+        private LayoutUnit _heightUnit = LayoutUnit.Pixel;
+
+        private LayoutUnit _minimumWidthUnit = LayoutUnit.Pixel;
+        private LayoutUnit _minimumHeightUnit = LayoutUnit.Pixel;
+
+        private LayoutUnit _maximumWidthUnit = LayoutUnit.Pixel;
+        private LayoutUnit _maximumHeightUnit = LayoutUnit.Pixel;
+
+        private LayoutUnit _cornerRadiusTopLeftUnit = LayoutUnit.Pixel;
+        private LayoutUnit _cornerRadiusBottomLeftUnit = LayoutUnit.Pixel;
+        private LayoutUnit _cornerRadiusBottomRightUnit = LayoutUnit.Pixel;
+        private LayoutUnit _cornerRadiusTopRightUnit = LayoutUnit.Pixel;
+        private ComputedBox _computedBox = new ComputedBox();
+
+        public bool UpdateRequired { get; private set; } = true;
+
+        public Vector4 Margin
+        {
+            get => _margin;
+            set => SetField(ref _margin, value);
+        }
+
+        public Vector4 Padding
+        {
+            get => _padding;
+            set => SetField(ref _padding, value);
+        }
+
+        public Vector4 Border
+        {
+            get => _border;
+            set => SetField(ref _border, value);
+        }
+
+        public Vector2 Size
+        {
+            get => _size;
+            set => SetField(ref _size, value);
+        }
+
+        public Vector2 MinimumSize
+        {
+            get => _minimumSize;
+            set => SetField(ref _minimumSize, value);
+        }
+
+        public Vector2 MaximumSize
+        {
+            get => _maximumSize;
+            set => SetField(ref _maximumSize, value);
+        }
+
+        public Vector4 CornerRadii
+        {
+            get => _cornerRadii;
+            set => SetField(ref _cornerRadii, value);
+        }
+
+        public float MarginLeft
+        {
+            get => Margin.X;
+            set => Margin = Margin with { X = value };
+        }
+
+        public float MarginTop
+        {
+            get => Margin.Y;
+            set => Margin = Margin with { Y = value };
+        }
+
+        public float MarginRight
+        {
+            get => Margin.Z;
+            set => Margin = Margin with { Z = value };
+        }
+
+        public float MarginBottom
+        {
+            get => Margin.W;
+            set => Margin = Margin with { W = value };
+        }
+
+        public float PaddingLeft
+        {
+            get => Padding.X;
+            set => Padding = Padding with { X = value };
+        }
+
+        public float PaddingTop
+        {
+            get => Padding.Y;
+            set => Padding = Padding with { Y = value };
+        }
+
+        public float PaddingRight
+        {
+            get => Padding.Z;
+            set => Padding = Padding with { Z = value };
+        }
+
+        public float PaddingBottom
+        {
+            get => Padding.W;
+            set => Padding = Padding with { W = value };
+        }
+
+        public float BorderLeft
+        {
+            get => Border.X;
+            set => Border = Border with { X = value };
+        }
+
+        public float BorderTop
+        {
+            get => Border.Y;
+            set => Border = Border with { Y = value };
+        }
+
+        public float BorderRight
+        {
+            get => Border.Z;
+            set => Border = Border with { Z = value };
+        }
+
+        public float BorderBottom
+        {
+            get => Border.W;
+            set => Border = Border with { W = value };
+        }
+
+        public float CornerRadiusTopLeft
+        {
+            get => CornerRadii.X;
+            set => CornerRadii = CornerRadii with { X = value };
+        }
+
+        public float CornerRadiusBottomLeft
+        {
+            get => CornerRadii.Y;
+            set => CornerRadii = CornerRadii with { Y = value };
+        }
+
+        public float CornerRadiusBottomRight
+        {
+            get => CornerRadii.Z;
+            set => CornerRadii = CornerRadii with { Z = value };
+        }
+
+        public float CornerRadiusTopRight
+        {
+            get => CornerRadii.W;
+            set => CornerRadii = CornerRadii with { W = value };
+        }
+
+        public LayoutUnit MarginLeftUnit
+        {
+            get => _marginLeftUnit;
+            set => SetField(ref _marginLeftUnit, value);
+        }
+
+        public LayoutUnit MarginTopUnit
+        {
+            get => _marginTopUnit;
+            set => SetField(ref _marginTopUnit, value);
+        }
+
+        public LayoutUnit MarginRightUnit
+        {
+            get => _marginRightUnit;
+            set => SetField(ref _marginRightUnit, value);
+        }
+
+        public LayoutUnit MarginBottomUnit
+        {
+            get => _marginBottomUnit;
+            set => SetField(ref _marginBottomUnit, value);
+        }
+
+        public LayoutUnit PaddingLeftUnit
+        {
+            get => _paddingLeftUnit;
+            set => SetField(ref _paddingLeftUnit, value);
+        }
+
+        public LayoutUnit PaddingTopUnit
+        {
+            get => _paddingTopUnit;
+            set => SetField(ref _paddingTopUnit, value);
+        }
+
+        public LayoutUnit PaddingRightUnit
+        {
+            get => _paddingRightUnit;
+            set => SetField(ref _paddingRightUnit, value);
+        }
+
+        public LayoutUnit PaddingBottomUnit
+        {
+            get => _paddingBottomUnit;
+            set => SetField(ref _paddingBottomUnit, value);
+        }
+
+        public LayoutUnit BorderLeftUnit
+        {
+            get => _borderLeftUnit;
+            set => SetField(ref _borderLeftUnit, value);
+        }
+
+        public LayoutUnit BorderTopUnit
+        {
+            get => _borderTopUnit;
+            set => SetField(ref _borderTopUnit, value);
+        }
+
+        public LayoutUnit BorderRightUnit
+        {
+            get => _borderRightUnit;
+            set => SetField(ref _borderRightUnit, value);
+        }
+
+        public LayoutUnit BorderBottomUnit
+        {
+            get => _borderBottomUnit;
+            set => SetField(ref _borderBottomUnit, value);
+        }
+
+        public LayoutUnit WidthUnit
+        {
+            get => _widthUnit;
+            set => SetField(ref _widthUnit, value);
+        }
+
+        public LayoutUnit HeightUnit
+        {
+            get => _heightUnit;
+            set => SetField(ref _heightUnit, value);
+        }
+
+        public LayoutUnit MinimumWidthUnit
+        {
+            get => _minimumWidthUnit;
+            set => SetField(ref _minimumWidthUnit, value);
+        }
+
+        public LayoutUnit MinimumHeightUnit
+        {
+            get => _minimumHeightUnit;
+            set => SetField(ref _minimumHeightUnit, value);
+        }
+
+        public LayoutUnit MaximumWidthUnit
+        {
+            get => _maximumWidthUnit;
+            set => SetField(ref _maximumWidthUnit, value);
+        }
+
+        public LayoutUnit MaximumHeightUnit
+        {
+            get => _maximumHeightUnit;
+            set => SetField(ref _maximumHeightUnit, value);
+        }
+
+        public LayoutUnit CornerRadiusTopLeftUnit
+        {
+            get => _cornerRadiusTopLeftUnit;
+            set => SetField(ref _cornerRadiusTopLeftUnit, value);
+        }
+
+        public LayoutUnit CornerRadiusBottomLeftUnit
+        {
+            get => _cornerRadiusBottomLeftUnit;
+            set => SetField(ref _cornerRadiusBottomLeftUnit, value);
+        }
+
+        public LayoutUnit CornerRadiusBottomRightUnit
+        {
+            get => _cornerRadiusBottomRightUnit;
+            set => SetField(ref _cornerRadiusBottomRightUnit, value);
+        }
+
+        public LayoutUnit CornerRadiusTopRightUnit
+        {
+            get => _cornerRadiusTopRightUnit;
+            set => SetField(ref _cornerRadiusTopRightUnit, value);
+        }
+
+        public ComputedBox ComputedBox
+        {
+            get => _computedBox;
+            private set => SetField(ref _computedBox, value, false);
+        }
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        public ComputedBox ComputeLayout(Vector2 intrinsic, Vector2 dpi, Vector2 area, Vector2 star)
+        {
+            // TODO: take intrinsic into account.
+            Vector4 margin = Compute(_margin, dpi, area, star, _marginLeftUnit, _marginTopUnit, _marginRightUnit, _marginBottomUnit);
+            Vector4 padding = Compute(_padding, dpi, area, star, _paddingLeftUnit, _paddingTopUnit, _paddingRightUnit, _paddingBottomUnit);
+            Vector4 border = Compute(_border, dpi, area, star, _borderLeftUnit, _borderTopUnit, _borderRightUnit, _borderBottomUnit);
+
+            Vector2 size = Compute(_size, dpi, area, star, _widthUnit, _heightUnit);
+            Vector2 minimumSize = Compute(_minimumSize, dpi, area, star, _minimumWidthUnit, _minimumHeightUnit);
+            Vector2 maximumSize = Compute(_maximumSize, dpi, area, star, _maximumWidthUnit, _maximumHeightUnit);
+            Vector4 cornerRadii = Compute(_cornerRadii, dpi, area, star, _cornerRadiusTopLeftUnit,
+                _cornerRadiusBottomLeftUnit, _cornerRadiusBottomRightUnit, _cornerRadiusTopRightUnit);
+
+            size = Vector2.Clamp(size, minimumSize, maximumSize);
+
+            ComputedBox = new ComputedBox(margin, padding, border, size)
+            {
+                CornerRadii = cornerRadii,
+            };
+
+            UpdateRequired = false;
+            return ComputedBox;
+        }
+
+        private static float Compute(float value, float dpi, float length, float star, LayoutUnit unit)
+        {
+            const float dpiToMm = 0f;
+            const float dpiToPt = 0f;
+
+            return unit switch
+            {
+                LayoutUnit.Pixel => value,
+                LayoutUnit.Millimeter => value * dpi * dpiToMm,
+                LayoutUnit.Percent => value * length,
+                LayoutUnit.Point => value * dpi * dpiToPt,
+                LayoutUnit.Star => value * star,
+                _ => throw new ArgumentException(nameof(unit)),
+            };
+        }
+
+        private static Vector2 Compute(Vector2 value, Vector2 dpi, Vector2 size, Vector2 star, LayoutUnit xUnit, LayoutUnit yUnit)
+        {
+            return new Vector2(
+                Compute(value.X, dpi.X, size.X, star.X, xUnit),
+                Compute(value.Y, dpi.Y, size.Y, star.Y, yUnit));
+        }
+
+        private static Vector4 Compute(Vector4 value, Vector2 dpi, Vector2 size, Vector2 star, LayoutUnit xUnit, LayoutUnit yUnit, LayoutUnit zUnit, LayoutUnit wUnit)
+        {
+            return new Vector4(
+                Compute(value.X, dpi.X, size.X, star.X, xUnit),
+                Compute(value.Y, dpi.Y, size.Y, star.Y, yUnit),
+                Compute(value.Z, dpi.X, size.X, star.X, zUnit),
+                Compute(value.W, dpi.Y, size.Y, star.Y, wUnit));
+        }
+
+
+        private void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        private bool SetField<T>(ref T field, T value, bool updateRequired = true, [CallerMemberName] string? propertyName = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(field, value)) return false;
+            field = value;
+            UpdateRequired |= updateRequired;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+    }
+}

Dashboard.Common/Layout/LayoutInfo.cs

@@ -0,0 +1,171 @@
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+
+namespace Dashboard.Layout
+{
+    public enum DisplayMode
+    {
+        None,
+        Inline,
+        Block,
+    }
+
+    public enum ContainerMode
+    {
+        Basic,
+        Flex,
+        Grid,
+    }
+
+    public enum FlowDirection
+    {
+        Row,
+        Column,
+        RowReverse,
+        ColumnReverse,
+    }
+
+    public enum PositionMode
+    {
+        Absolute,
+        Relative,
+    }
+
+    public enum OverflowMode
+    {
+        Hidden,
+        Overflow,
+        ScrollHorizontal,
+        ScrollVertical,
+        ScrollBoth,
+    }
+
+    public record struct TrackInfo(float Width, LayoutUnit Unit)
+    {
+        public static readonly TrackInfo Default = new TrackInfo(0, LayoutUnit.Auto);
+    }
+
+    public class ContainerLayoutInfo : INotifyPropertyChanged
+    {
+        private ContainerMode _containerMode;
+        private FlowDirection _flowDirection = FlowDirection.Row;
+
+        public ObservableCollection<TrackInfo> Rows { get; } = new ObservableCollection<TrackInfo>() { TrackInfo.Default };
+
+        public ObservableCollection<TrackInfo> Columns { get; } =
+            new ObservableCollection<TrackInfo>() { TrackInfo.Default };
+
+        public ContainerMode ContainerMode
+        {
+            get => _containerMode;
+            set => SetField(ref _containerMode, value);
+        }
+
+        public FlowDirection FlowDirection
+        {
+            get => _flowDirection;
+            set => SetField(ref _flowDirection, value);
+        }
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        protected bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(field, value)) return false;
+            field = value;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+    }
+
+    public class LayoutInfo : INotifyPropertyChanged
+    {
+        private DisplayMode _displayMode = DisplayMode.Inline;
+        private PositionMode _positionMode = PositionMode.Relative;
+        private OverflowMode _overflowMode = OverflowMode.Overflow;
+        private int _row = 0;
+        private int _column = 0;
+
+        /// <summary>
+        /// Changes the control display.
+        /// </summary>
+        public DisplayMode DisplayMode
+        {
+            get => _displayMode;
+            set => SetField(ref _displayMode, value);
+        }
+
+        /// <summary>
+        /// Changes how the control is positioned.
+        /// </summary>
+        public PositionMode PositionMode
+        {
+            get => _positionMode;
+            set => SetField(ref _positionMode, value);
+        }
+
+        /// <summary>
+        /// Changes how overflows are handled.
+        /// </summary>
+        public OverflowMode OverflowMode
+        {
+            get => _overflowMode;
+            set => SetField(ref _overflowMode, value);
+        }
+
+        public LayoutBox Box { get; } = new LayoutBox();
+
+        /// <summary>
+        /// The row of the control in a grid container.
+        /// </summary>
+        public int Row
+        {
+            get => _row;
+            set => SetField(ref _row, value);
+        }
+
+        /// <summary>
+        /// The column of the control in a grid container.
+        /// </summary>
+        public int Column
+        {
+            get => _column;
+            set => SetField(ref _column, value);
+        }
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        public LayoutInfo()
+        {
+            Box.PropertyChanged += BoxOnPropertyChanged;
+            // Rows.CollectionChanged    += RowsChanged;
+            // Columns.CollectionChanged += ColumnsChanged;
+        }
+
+        private void BoxOnPropertyChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            OnPropertyChanged(nameof(Box));
+        }
+
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        private bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(field, value)) return false;
+            field = value;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+    }
+}

Dashboard.Common/Layout/LayoutSolution.cs

@@ -0,0 +1,364 @@
+using System.Numerics;
+
+namespace Dashboard.Layout
+{
+    public record struct LayoutItemSolution(ILayoutItem Item, ComputedBox Solution);
+
+    public class LayoutSolution
+    {
+        public ILayoutContainer Container { get; }
+        public IReadOnlyList<LayoutItemSolution> Items { get; }
+
+        private LayoutSolution(ILayoutContainer container, IEnumerable<LayoutItemSolution> itemSolutions)
+        {
+            Container = container;
+            Items = itemSolutions.ToList().AsReadOnly();
+        }
+
+        public static LayoutSolution CalculateLayout<T1>(T1 container, Vector2 limits, int iterations = 3, float absTol = 0.001f, float relTol = 0.01f)
+            where T1 : ILayoutContainer
+        {
+            switch (container.ContainerLayout.ContainerMode)
+            {
+                default:
+                case ContainerMode.Basic:
+                    return SolveForBasicLayout(container, limits, iterations, absTol, relTol);
+                case ContainerMode.Flex:
+                    return SolveForFlex(container, limits, iterations, absTol, relTol);
+                case ContainerMode.Grid:
+                    return SolveForGrid(container, limits, iterations, absTol, relTol);
+            }
+        }
+
+        private static LayoutSolution SolveForGrid<T1>(T1 container, Vector2 limits, int iterations, float absTol, float relTol) where T1 : ILayoutContainer
+        {
+            throw new NotImplementedException();
+        }
+
+        private static LayoutSolution SolveForFlex<T1>(T1 container, Vector2 limits,int iterations, float absTol, float relTol) where T1 : ILayoutContainer
+        {
+            throw new NotImplementedException();
+        }
+
+        private static LayoutSolution SolveForBasicLayout<T1>(T1 container, Vector2 limits, int iterations, float absTol, float relTol) where T1 : ILayoutContainer
+        {
+            int count = container.Count();
+            LayoutItemSolution[] items = new LayoutItemSolution[count];
+
+            int i = 0;
+            foreach (ILayoutItem item in container)
+            {
+                items[i++] = new LayoutItemSolution(item, default);
+            }
+
+            bool limitX = limits.X > 0;
+            bool limitY = limits.Y > 0;
+
+            while (iterations-- > 0)
+            {
+                Vector2 pen = Vector2.Zero;
+
+                i = 0;
+                foreach (ILayoutItem item in container)
+                {
+                    Vector2 size = item.CalculateIntrinsicSize();
+
+                }
+            }
+
+            return new LayoutSolution(container, items);
+        }
+
+        private record TrackSolution(TrackInfo Track)
+        {
+            public bool Auto => Track.Unit == LayoutUnit.Auto;
+
+            public bool Absolute => Track.Unit.IsAbsolute();
+
+            public float Requested { get; private set; }
+            public float Value { get; private set; }
+
+            public float Result { get; set; } = 0.0f;
+            public bool IsFrozen { get; set; } = false;
+
+            public void CalculateRequested(float dpi, float rel, float star)
+            {
+                Requested = new Metric(Track.Unit, Track.Width).Compute(dpi, rel, star);
+            }
+
+            public void Freeze()
+            {
+                if (IsFrozen)
+                    return;
+
+                IsFrozen = true;
+                Result = Value;
+            }
+        }
+
+        private delegate float GetItemLength<in T1>(float dpi, float rel, float star, T1 item)
+            where T1 : ILayoutItem;
+
+        private TrackSolution[] SolveForGridTracks<T1, T2, T3>(
+            float limit,
+            T1 tracks,
+            T2 container,
+            int iterations,
+            float absTol,
+            float relTol,
+            Func<int, T3> getItemTrack,
+            GetItemLength<T3> getItemLength)
+            where T1 : IList<TrackInfo>
+            where T2 : ILayoutContainer
+            where T3 : ILayoutItem
+        {
+            int itemCount = container.Count();
+            bool auto = limit < 0;
+            TrackSolution[] solution = new TrackSolution[tracks.Count];
+
+            foreach (TrackSolution track in solution)
+            {
+                if (track.Absolute) {
+                    // FIXME: pass DPI here.
+                    track.CalculateRequested(96f, limit, 0);
+                    track.Freeze();
+                }
+            }
+
+            while (iterations-- > 0)
+            {
+            }
+
+            for (int i = 0; i < tracks.Count; i++)
+            {
+                solution[i].Freeze();
+            }
+
+            return solution;
+        }
+
+        // private static void GetIntrinsicGridSizes<T1, T2>(Span<float> cols, Span<float> rows, T1 parent, T2 items)
+        //     where T1 : ILayoutItem
+        //     where T2 : IEnumerable<ILayoutItem>
+        // {
+        //     CopyToSpan(rows, parent.Layout.Rows);
+        //     CopyToSpan(cols, parent.Layout.Columns);
+        //
+        //     foreach (ILayoutItem item in items)
+        //     {
+        //         int col = Math.Clamp(item.Layout.Column, 0, cols.Length - 1);
+        //         int row = Math.Clamp(item.Layout.Row, 0, rows.Length - 1);
+        //
+        //         bool autoCols = parent.Layout.Columns[col] < 0;
+        //         bool autoRows = parent.Layout.Rows[row] < 0;
+        //
+        //         if (!autoRows && !autoCols)
+        //             continue;
+        //
+        //         Vector2 size = item.CalculateIntrinsicSize();
+        //         cols[col] = autoCols ? Math.Max(size.X, cols[col]) : cols[col];
+        //         rows[row] = autoRows ? Math.Max(size.Y, rows[row]) : rows[row];
+        //     }
+        // }
+        //
+        // public static Vector2 CalculateIntrinsicSize<T1, T2>(T1 parent, T2 items)
+        //     where T1 : ILayoutItem
+        //     where T2 : IEnumerable<ILayoutItem>
+        // {
+        //     // Copy layout details.
+        //     Span<float> cols = stackalloc float[parent.Layout.Columns.Count];
+        //     Span<float> rows = stackalloc float[parent.Layout.Rows.Count];
+        //
+        //     GetIntrinsicGridSizes(cols, rows, parent, items);
+        //
+        //     float width = parent.Layout.Margin.X + parent.Layout.Margin.Z + parent.Layout.Padding.X + parent.Layout.Padding.Z + SumSpan<float>(cols);
+        //     float height = parent.Layout.Margin.Y + parent.Layout.Margin.W + parent.Layout.Padding.Y + parent.Layout.Padding.W + SumSpan<float>(rows);
+        //
+        //     return new Vector2(width, height);
+        // }
+        //
+        // public static GridResult Layout<T1, T2>(T1 parent, T2 items, Vector2 limits, int iterations = 3, float abstol = 0.0001f, float reltol = 0.01f)
+        //     where T1 : ILayoutItem
+        //     where T2 : IEnumerable<ILayoutItem>
+        // {
+        //     Vector4 contentSpace = parent.Layout.Margin + parent.Layout.Padding;
+        //     Vector2 contentLimits = new Vector2(
+        //         limits.X > 0 ? limits.X - contentSpace.X - contentSpace.Z : -1,
+        //         limits.Y > 0 ? limits.Y - contentSpace.Y - contentSpace.W : -1);
+        //
+        //     // Get rows and columns for now.
+        //     Span<Track> cols = stackalloc Track[parent.Layout.Columns.Count];
+        //     Span<Track> rows = stackalloc Track[parent.Layout.Rows.Count];
+        //
+        //     for (int i = 0; i < cols.Length; i++)
+        //     {
+        //         cols[i] = new Track(parent.Layout.Columns[i]);
+        //
+        //         if (!cols[i].Auto)
+        //         {
+        //             cols[i].Freeze();
+        //         }
+        //     }
+        //
+        //     for (int i = 0; i < rows.Length; i++)
+        //     {
+        //         rows[i] = new Track(parent.Layout.Rows[i]);
+        //
+        //         if (!rows[i].Auto)
+        //         {
+        //             rows[i].Freeze();
+        //         }
+        //     }
+        //
+        //     int freeRows = 0;
+        //     int freeCols = 0;
+        //     while (iterations-- > 0 && ((freeRows = CountFree(rows)) > 0 || (freeCols = CountFree(cols)) > 0))
+        //     {
+        //         // Calculate the remaining size.
+        //         Vector2 remaining = contentLimits;
+        //
+        //         for (int i = 0; contentLimits.X > 0 && i < cols.Length; i++)
+        //         {
+        //             if (cols[i].IsFrozen)
+        //                 remaining.X -= cols[i].Value;
+        //         }
+        //
+        //         for (int i = 0; contentLimits.Y > 0 && i < rows.Length; i++)
+        //         {
+        //             if (rows[i].IsFrozen)
+        //                 remaining.Y -= rows[i].Value;
+        //         }
+        //
+        //         Vector2 childLimits = remaining / new Vector2(Math.Max(freeCols, 1), Math.Max(freeRows, 1));
+        //
+        //
+        //         // Calculate the size of each free track.
+        //         foreach (ILayoutItem child in items)
+        //         {
+        //             int c = Math.Clamp(child.Layout.Column, 0, cols.Length - 1);
+        //             int r = Math.Clamp(child.Layout.Row, 0, rows.Length - 1);
+        //
+        //             bool autoRow = rows[r].Auto;
+        //             bool autoCol = cols[c].Auto;
+        //
+        //             if (!autoRow && !autoCol)
+        //                 continue;
+        //
+        //             Vector2 childSize = child.CalculateSize(childLimits);
+        //
+        //             if (autoCol)
+        //                 cols[c].Value = Math.Max(childLimits.X, childSize.X);
+        //
+        //             if (autoRow)
+        //                 rows[r].Value = Math.Max(childLimits.Y, childSize.Y);
+        //         }
+        //
+        //         // Calculate for errors and decide to freeze them.
+        //
+        //         for (int i = 0; limits.X > 0 && i < cols.Length; i++)
+        //         {
+        //             if (WithinTolerance(cols[i].Value, childLimits.X, abstol, reltol))
+        //             {
+        //                 cols[i].Freeze();
+        //             }
+        //         }
+        //
+        //         for (int i = 0; limits.Y > 0 && i < rows.Length; i++)
+        //         {
+        //             if (WithinTolerance(rows[i].Value, childLimits.Y, abstol, reltol))
+        //             {
+        //                 rows[i].Freeze();
+        //             }
+        //         }
+        //     }
+        //
+        //     Vector2 size = new Vector2(
+        //         parent.Layout.Margin.X + parent.Layout.Margin.Z + parent.Layout.Padding.X + parent.Layout.Padding.Z,
+        //         parent.Layout.Margin.Y + parent.Layout.Margin.W + parent.Layout.Padding.Y + parent.Layout.Padding.W);
+        //
+        //     foreach (ref Track col in cols)
+        //     {
+        //         col.Freeze();
+        //         size.X += col.Result;
+        //     }
+        //
+        //     foreach (ref Track row in rows)
+        //     {
+        //         row.Freeze();
+        //         size.Y += row.Result;
+        //     }
+        //
+        //     if (limits.X > 0) size.X = Math.Max(size.X, limits.X);
+        //     if (limits.Y > 0) size.Y = Math.Max(size.Y, limits.Y);
+        //
+        //     // Temporary solution
+        //     return new GridResult(size, cols.ToArray().Select(x => x.Result).ToArray(), rows.ToArray().Select(x => x.Result).ToArray());
+        //
+        //     static int CountFree(Span<Track> tracks)
+        //     {
+        //         int i = 0;
+        //         foreach (Track track in tracks)
+        //         {
+        //             if (!track.IsFrozen)
+        //                i++;
+        //         }
+        //
+        //         return i;
+        //     }
+        // }
+        //
+        // private static void CopyToSpan<T1, T2>(Span<T1> span, T2 items)
+        //     where T2 : IEnumerable<T1>
+        // {
+        //     using IEnumerator<T1> iterator = items.GetEnumerator();
+        //     for (int i = 0; i < span.Length; i++)
+        //     {
+        //         if (!iterator.MoveNext())
+        //             break;
+        //
+        //         span[i] = iterator.Current;
+        //     }
+        // }
+        //
+        // private static T1 SumSpan<T1>(ReadOnlySpan<T1> span)
+        //     where T1 : struct, INumber<T1>
+        // {
+        //     T1 value = default;
+        //
+        //     foreach (T1 item in span)
+        //     {
+        //         value += item;
+        //     }
+        //
+        //     return value;
+        // }
+        //
+        // private static bool WithinTolerance<T>(T value, T limit, T abstol, T reltol)
+        //     where T : INumber<T>
+        // {
+        //     T tol = T.Max(abstol, value * reltol);
+        //     return T.Abs(value - limit) < tol;
+        // }
+        //
+        // public record GridResult(Vector2 Size, float[] Columns, float[] Rows)
+        // {
+        //
+        // }
+        //
+        // private record struct Track(float Request)
+        // {
+        //     public bool Auto => Request < 0;
+        //
+        //     public bool IsFrozen { get; private set; } = false;
+        //     public float Value { get; set; } = Request;
+        //
+        //     public float Result { get; private set; }
+        //
+        //     public void Freeze()
+        //     {
+        //         Result = Value;
+        //         IsFrozen = true;
+        //     }
+        // }
+    }
+}

Dashboard.Common/LayoutUnit.cs

@@ -0,0 +1,30 @@
+namespace Dashboard
+{
+    public enum LayoutUnit : short
+    {
+        /// <summary>
+        /// Does not specify a unit.
+        /// </summary>
+        Auto,
+        /// <summary>
+        /// The default unit. A size of a single picture element.
+        /// </summary>
+        Pixel = 1,
+        /// <summary>
+        /// 1/72th of an inch traditional in graphics design.
+        /// </summary>
+        Point = 2,
+        /// <summary>
+        /// The universal length unit for small distances.
+        /// </summary>
+        Millimeter = 3,
+        /// <summary>
+        /// An inverse proportional unit with respect to the container size.
+        /// </summary>
+        Star = 4,
+        /// <summary>
+        /// A directly proportional unit with respect to the container size.
+        /// </summary>
+        Percent = 5,
+    }
+}

Dashboard.Common/Measure.cs

@@ -1,48 +1,108 @@
+using System.Numerics;
+
 namespace Dashboard
 {
-    public enum MeasurementUnit
+    public record struct LayoutUnits(LayoutUnit All)
     {
-        /// <summary>
+        public LayoutUnit XUnit
-        /// The default unit. A size of a single picture element.
+        {
-        /// </summary>
+            get => (LayoutUnit)(((int)All & 0xF) >> 0);
-        Pixel,
+            set => All = (LayoutUnit)(((int)All & ~(0xF << 0)) | ((int)value << 0));
-        /// <summary>
+        }
-        /// 1/72th of an inch traditional in graphics design.
+
-        /// </summary>
+        public LayoutUnit YUnit
-        Point,
+        {
-        /// <summary>
+            get => (LayoutUnit)(((int)All & 0xF) >> 4);
-        /// The universal length unit for small distances.
+            set => All = (LayoutUnit)(((int)All & ~(0xF << 4)) | ((int)value << 4));
-        /// </summary>
+        }
-        Millimeter,
+
-        /// <summary>
+        public LayoutUnit ZUnit
-        /// An inverse proportional unit with respect to the container size.
+        {
-        /// </summary>
+            get => (LayoutUnit)(((int)All & 0xF) >> 8);
-        Star,
+            set => All = (LayoutUnit)(((int)All & ~(0xF << 8)) | ((int)value << 8));
-        /// <summary>
+        }
-        /// A directly proportional unit with respect to the container size.
+
-        /// </summary>
+        public LayoutUnit WUnit
-        Percent,
+        {
+            get => (LayoutUnit)(((int)All & 0xF) >> 12);
+            set => All = (LayoutUnit)(((int)All & ~(0xF << 12)) | ((int)value << 12));
+        }
     }
 
-    public record struct AdvancedMetric(MeasurementUnit Unit, float Value)
+    public record struct Metric(LayoutUnit Units, float Value)
     {
-        public AdvancedMetric Convert(MeasurementUnit target, float dpi, float rel, int stars)
+        public float Compute(float dpi, float rel, float star)
+        {
+            switch (Units)
+            {
+                case LayoutUnit.Auto:
+                    return -1;
+                case LayoutUnit.Millimeter:
+                    float mm2Px = dpi / 25.4f;
+                    return Value * mm2Px;
+                case LayoutUnit.Pixel:
+                    return Value;
+                case LayoutUnit.Point:
+                    float pt2Px = 72 / dpi;
+                    return Value * pt2Px;
+                case LayoutUnit.Percent:
+                    return rel * Value;
+                case LayoutUnit.Star:
+                    return star * Value;
+                default:
+                    throw new Exception("Unrecognized unit.");
+            }
+        }
+    }
+
+    public record struct Metric2D(LayoutUnits Units, Vector2 Value)
+    {
+        public float X
+        {
+            get => Value.X;
+            set => Value = new Vector2(value, Value.Y);
+        }
+
+        public LayoutUnit XUnits
+        {
+            get => Units.XUnit;
+            set => Units = Units with { XUnit = value };
+        }
+
+        public float Y
+        {
+            get => Value.Y;
+            set => Value = new Vector2(Value.X, value);
+        }
+
+        public LayoutUnit YUnits
+        {
+            get => Units.YUnit;
+            set => Units = Units with { YUnit = value };
+        }
+    }
+
+    public record struct BoxMetric(LayoutUnit Units, Box2d Value);
+
+    public record struct AdvancedMetric(LayoutUnit Unit, float Value)
+    {
+        public AdvancedMetric Convert(LayoutUnit target, float dpi, float rel, int stars)
         {
             if (Unit == target)
                 return this;
 
             float pixels = Unit switch {
-                MeasurementUnit.Pixel => Value,
+                LayoutUnit.Pixel => Value,
-                MeasurementUnit.Point => Value * (72f / dpi),
+                LayoutUnit.Point => Value * (72f / dpi),
-                MeasurementUnit.Millimeter => Value * (28.3464566929f / dpi),
+                LayoutUnit.Millimeter => Value * (28.3464566929f / dpi),
-                MeasurementUnit.Star => Value * rel / stars,
+                LayoutUnit.Star => Value * rel / stars,
-                MeasurementUnit.Percent => Value * rel / 100,
+                LayoutUnit.Percent => Value * rel / 100,
                 _ => throw new Exception(),
             };
 
             float value = target switch {
-                MeasurementUnit.Pixel => pixels,
+                LayoutUnit.Pixel => pixels,
-                MeasurementUnit.Point => Value * (dpi / 72f),
+                LayoutUnit.Point => Value * (dpi / 72f),
                 // MeasurementUnit.Millimeter =>
             };
 
@@ -65,22 +125,4 @@ namespace Dashboard
                 ? metric
                 : throw new Exception($"Could not parse the value '{str}'.");
     }
-
-    public static class MeasurementExtensions
-    {
-        public static bool IsRelative(this MeasurementUnit unit) => unit switch {
-            MeasurementUnit.Star or MeasurementUnit.Percent => true,
-            _ => false,
-        };
-        public static bool IsAbsolute(this MeasurementUnit unit) => !IsRelative(unit);
-
-        public static string ToShortString(this MeasurementUnit unit) => unit switch {
-            MeasurementUnit.Pixel => "px",
-            MeasurementUnit.Point => "pt",
-            MeasurementUnit.Millimeter => "mm",
-            MeasurementUnit.Star => "*",
-            MeasurementUnit.Percent => "%",
-            _ => throw new Exception("Unknown unit."),
-        };
-    }
 }

Dashboard.Common/MeasurementExtensions.cs

@@ -0,0 +1,30 @@
+namespace Dashboard
+{
+    public static class MeasurementExtensions
+    {
+        public static bool IsRelative(this LayoutUnit unit) => unit switch {
+            LayoutUnit.Star or LayoutUnit.Percent => true,
+            _ => false,
+        };
+        public static bool IsAbsolute(this LayoutUnit unit) => !IsRelative(unit);
+
+        public static string ToShortString(this LayoutUnit unit) => unit switch {
+            LayoutUnit.Pixel => "px",
+            LayoutUnit.Point => "pt",
+            LayoutUnit.Millimeter => "mm",
+            LayoutUnit.Star => "*",
+            LayoutUnit.Percent => "%",
+            _ => throw new Exception("Unknown unit."),
+        };
+
+        public static bool WithinTolerance(this float value, float reference, float absTol, float relTol)
+            => value.CompareTolerance(reference, absTol, relTol) == 0;
+
+        public static int CompareTolerance(this float value, float reference, float absTol, float relTol)
+        {
+            float tolerance = Math.Max(absTol, Math.Abs(reference) * relTol);
+            float difference = value - reference;
+            return difference < -tolerance ? -1 : difference > tolerance ? 1 : 0;
+        }
+    }
+}

Dashboard.Common/Pal/Application.cs

@@ -0,0 +1,202 @@
+using Dashboard.Collections;
+using Dashboard.Windowing;
+using BindingFlags = System.Reflection.BindingFlags;
+
+namespace Dashboard.Pal
+{
+    public abstract class Application : IContextBase<Application, IApplicationExtension>
+    {
+        public abstract string DriverName { get; }
+        public abstract string DriverVendor { get; }
+        public abstract Version DriverVersion { get; }
+
+        public virtual string AppTitle { get; set; } = "Dashboard Application";
+
+        public bool IsInitialized { get; private set; } = false;
+        public bool IsDisposed { get; private set; } = false;
+        public IContextDebugger? Debugger { get; set; }
+
+        protected CancellationToken? CancellationToken { get; private set; }
+        protected bool Quit { get; set; } = false;
+
+        private readonly TypeDictionary<IApplicationExtension> _extensions =
+            new TypeDictionary<IApplicationExtension>(true);
+        private readonly TypeDictionary<IApplicationExtension, Func<IApplicationExtension>> _preloadedExtensions =
+            new TypeDictionary<IApplicationExtension, Func<IApplicationExtension>>(true);
+
+        public event EventHandler<DeviceContext>? DeviceContextCreated;
+
+        public Application()
+        {
+            Current = this;
+        }
+
+        ~Application()
+        {
+            InvokeDispose(false);
+        }
+
+        public void Initialize()
+        {
+            if (IsInitialized)
+                return;
+
+            IsInitialized = true;
+
+            InitializeInternal();
+        }
+
+        protected virtual void InitializeInternal()
+        {
+        }
+
+        protected internal virtual void OnDeviceContextCreated(DeviceContext dc)
+        {
+            DeviceContextCreated?.Invoke(this, dc);
+        }
+
+        public virtual void RunEvents(bool wait)
+        {
+            if (!IsInitialized)
+                Initialize();
+        }
+
+        public void Run() => Run(true, System.Threading.CancellationToken.None);
+
+        public void Run(bool wait) => Run(wait, System.Threading.CancellationToken.None);
+
+        public void Run(bool waitForEvents, CancellationToken token)
+        {
+            CancellationToken = token;
+            CancellationToken.Value.Register(() => Quit = true);
+
+            InitializeInternal();
+
+            while (!Quit && !token.IsCancellationRequested)
+            {
+                RunEvents(waitForEvents);
+            }
+        }
+
+        #region Window API
+            /// <summary>
+            /// Creates a window. It could be a virtual window, or a physical window.
+            /// </summary>
+            /// <returns>A window.</returns>
+            public abstract IWindow CreateWindow();
+
+            /// <summary>
+            /// Always creates a physical window.
+            /// </summary>
+            /// <returns>A physical window.</returns>
+            public abstract IPhysicalWindow CreatePhysicalWindow();
+
+            /// <summary>
+            /// Create a physical window with a window manager.
+            /// </summary>
+            /// <returns>A physical window with the given window manager.</returns>
+            public IPhysicalWindow CreatePhysicalWindow(IWindowManager wm)
+            {
+                IPhysicalWindow window = CreatePhysicalWindow();
+                window.WindowManager = wm;
+                return window;
+            }
+
+            public IWindow CreateDialogWindow(IWindow? parent = null)
+            {
+                if (parent is IVirtualWindow virtualWindow)
+                {
+                    IWindow? window = virtualWindow.WindowManager?.CreateWindow();
+
+                    if (window != null)
+                        return window;
+                }
+
+                return CreatePhysicalWindow();
+            }
+        #endregion
+
+        public bool IsExtensionAvailable<T>() where T : IApplicationExtension
+        {
+            return _extensions.Contains<T>() || _preloadedExtensions.Contains<T>();
+        }
+
+        public bool ExtensionPreload<T>(Func<IApplicationExtension> loader) where T : IApplicationExtension
+        {
+            return _preloadedExtensions.Add<T>(loader);
+        }
+
+        public bool ExtensionPreload<T>() where T : IApplicationExtension, new()
+        {
+            return _preloadedExtensions.Add<T>(() => new T());
+        }
+
+        public T ExtensionRequire<T>() where T : IApplicationExtension
+        {
+            T? extension = default;
+
+            if (_extensions.TryGet(out extension))
+                return extension;
+
+            lock (_extensions)
+            {
+                if (_extensions.TryGet(out extension))
+                    return extension;
+
+                if (_preloadedExtensions.Remove<T>(out Func<IApplicationExtension>? loader))
+                {
+                    extension = (T)loader!();
+                }
+                else
+                {
+                    extension = Activator.CreateInstance<T>();
+                }
+
+                _extensions.Add(extension);
+                extension.Require(this);
+            }
+
+            return extension;
+        }
+
+        public bool ExtensionLoad<T>(T instance) where T : IApplicationExtension
+        {
+            if (_extensions.Contains(instance))
+                return false;
+
+            _extensions.Add(instance);
+            instance.Require(this);
+            return true;
+        }
+
+        protected virtual void Dispose(bool isDisposing)
+        {
+            if (!isDisposing) return;
+
+            Quit = true;
+            foreach (IApplicationExtension extension in _extensions)
+            {
+                extension.Dispose();
+            }
+
+            GC.SuppressFinalize(this);
+        }
+
+        private void InvokeDispose(bool isDisposing)
+        {
+            if (IsDisposed) return;
+            IsDisposed = true;
+
+            Dispose(isDisposing);
+        }
+
+        public void Dispose() => InvokeDispose(true);
+
+        [ThreadStatic] private static Application _current;
+        public static Application Current
+        {
+            get => _current ?? throw new InvalidOperationException("There is currently no current application.");
+            set => _current = value;
+        }
+    }
+}

Dashboard.Common/Pal/DeviceContext.cs

@@ -0,0 +1,149 @@
+using Dashboard.Collections;
+using Dashboard.Windowing;
+using BindingFlags = System.Reflection.BindingFlags;
+
+namespace Dashboard.Pal
+{
+    public abstract class DeviceContext : IContextBase<DeviceContext, IDeviceContextExtension>
+    {
+        private readonly TypeDictionary<IDeviceContextExtension> _extensions =
+            new TypeDictionary<IDeviceContextExtension>(true);
+        private readonly TypeDictionary<IDeviceContextExtension, Func<IDeviceContextExtension>> _preloadedExtensions =
+            new TypeDictionary<IDeviceContextExtension, Func<IDeviceContextExtension>>(true);
+
+        private readonly Dictionary<string, object> _attributes = new Dictionary<string, object>();
+
+
+        public Application Application { get; }
+        public IWindow? Window { get; }
+        public abstract string DriverName { get; }
+        public abstract string DriverVendor { get; }
+        public abstract Version DriverVersion { get; }
+
+        public bool IsDisposed { get; private set; }
+
+        /// <summary>
+        /// Optional debugging object for your pleasure.
+        /// </summary>
+        public IContextDebugger? Debugger { get; set; }
+
+        protected DeviceContext(Application app, IWindow? window)
+        {
+            Application = app;
+            Window = window;
+            app.OnDeviceContextCreated(this);
+        }
+
+        ~DeviceContext()
+        {
+            Dispose(false);
+        }
+
+        public virtual void Begin() { }
+
+        // public abstract void Paint(object renderbuffer);
+
+        public virtual void End() { }
+
+        public bool IsExtensionAvailable<T>() where T : IDeviceContextExtension
+        {
+            return _extensions.Contains<T>() || _preloadedExtensions.Contains<T>();
+        }
+
+        public bool ExtensionPreload<T>(Func<IDeviceContextExtension> loader) where T : IDeviceContextExtension
+        {
+            return _preloadedExtensions.Add<T>(loader);
+        }
+
+        public bool ExtensionPreload<T>() where T : IDeviceContextExtension, new()
+        {
+            return _preloadedExtensions.Add<T>(() => new T());
+        }
+
+        public T ExtensionRequire<T>() where T : IDeviceContextExtension
+        {
+            T? extension = default;
+
+            if (_extensions.TryGet(out extension))
+                return extension;
+
+            lock (_extensions)
+            {
+                if (_extensions.TryGet(out extension))
+                    return extension;
+
+                if (_preloadedExtensions.Remove<T>(out Func<IDeviceContextExtension>? loader))
+                {
+                    extension = (T)loader!();
+                }
+                else
+                {
+                    extension = Activator.CreateInstance<T>();
+                }
+
+                _extensions.Add(extension);
+                extension.Require(this);
+            }
+
+            return extension;
+        }
+
+        public bool ExtensionLoad<T>(T instance) where T : IDeviceContextExtension
+        {
+            if (_extensions.Contains(instance))
+                return false;
+
+            _extensions.Add(instance);
+            return true;
+        }
+
+        public void SetAttribute(string name, object? v)
+        {
+            if (v != null)
+                _attributes[name] = v;
+            else
+                _attributes.Remove(name);
+        }
+
+        public void SetAttribute<T>(string name, T v) => SetAttribute(name, (object?)v);
+
+        public object? GetAttribute(string name)
+        {
+            return _attributes.GetValueOrDefault(name);
+        }
+
+        public T? GetAttribute<T>(string name)
+        {
+            object? o = GetAttribute(name);
+            if (o != null)
+                return (T?)o;
+            return default;
+        }
+
+        /// <summary>
+        /// Implement your dispose in this function.
+        /// </summary>
+        /// <param name="isDisposing">True if disposing, false otherwise.</param>
+        protected virtual void Dispose(bool isDisposing)
+        {
+            if (!isDisposing) return;
+
+            foreach (IDeviceContextExtension extension in _extensions)
+            {
+                extension.Dispose();
+            }
+
+            GC.SuppressFinalize(this);
+        }
+
+        private void InvokeDispose(bool isDisposing)
+        {
+            if (IsDisposed) return;
+                IsDisposed = true;
+
+            Dispose(isDisposing);
+        }
+
+        public void Dispose() => InvokeDispose(true);
+    }
+}

Dashboard.Common/Pal/IApplicationExtension.cs

@@ -0,0 +1,7 @@
+namespace Dashboard.Pal
+{
+    public interface IApplicationExtension : IContextExtensionBase<Application>
+    {
+
+    }
+}

Dashboard.Common/Pal/IContextBase.cs

@@ -0,0 +1,122 @@
+namespace Dashboard.Pal
+{
+    /// <summary>
+    /// Information about this context interface.
+    /// </summary>
+    public interface IContextInterfaceInfo
+    {
+        /// <summary>
+        /// Name of this driver.
+        /// </summary>
+        string DriverName { get; }
+
+        /// <summary>
+        /// The vendor for this driver.
+        /// </summary>
+        string DriverVendor { get; }
+
+        /// <summary>
+        /// The version of this driver.
+        /// </summary>
+        Version DriverVersion { get; }
+    }
+
+    /// <summary>
+    /// The base context interface.
+    /// </summary>
+    public interface IContextBase : IContextInterfaceInfo, IDisposable
+    {
+        /// <summary>
+        /// The debugger for this context.
+        /// </summary>
+        IContextDebugger? Debugger { get; set; }
+    }
+
+    /// <summary>
+    /// The base context interface.
+    /// </summary>
+    /// <typeparam name="TContext">The context type.</typeparam>
+    /// <typeparam name="TExtension">The extension type, if used.</typeparam>
+    public interface IContextBase<TContext, in TExtension> : IContextBase
+        where TContext : IContextBase<TContext, TExtension>
+        where TExtension : IContextExtensionBase<TContext>
+    {
+        /// <summary>
+        /// Is such an extension available?
+        /// </summary>
+        /// <typeparam name="T">The extension to check.</typeparam>
+        /// <returns>True if the extension is available.</returns>
+        bool IsExtensionAvailable<T>() where T : TExtension;
+
+        /// <summary>
+        /// Preload extensions, to be lazy loaded when required.
+        /// </summary>
+        /// <typeparam name="T">The extension to preload.</typeparam>
+        /// <returns>
+        /// True if the extension was added to the preload set. Otherwise, already loaded or another extension
+        /// exists which provides this.
+        /// </returns>
+        bool ExtensionPreload<T>() where T : TExtension, new();
+
+        /// <summary>
+        /// Preload extensions, to be lazy loaded when required.
+        /// </summary>
+        /// <param name="loader">The loader delegate.</param>
+        /// <typeparam name="T">The extension to preload.</typeparam>
+        /// <returns>
+        /// True if the extension was added to the preload set. Otherwise, already loaded or another extension
+        /// exists which provides this.
+        /// </returns>
+        bool ExtensionPreload<T>(Func<TExtension> loader) where T : TExtension;
+
+        /// <summary>
+        /// Require an extension.
+        /// </summary>
+        /// <typeparam name="T">The extension to require.</typeparam>
+        /// <returns>The extension instance.</returns>
+        T ExtensionRequire<T>() where T : TExtension;
+
+        /// <summary>
+        /// Load an extension.
+        /// </summary>
+        /// <param name="instance">The extension instance.</param>
+        /// <typeparam name="T">The extension to require.</typeparam>
+        /// <returns>True if the extension was loaded, false if there was already one.</returns>
+        bool ExtensionLoad<T>(T instance) where T : TExtension;
+    }
+
+    /// <summary>
+    /// Base interface for all context extensions.
+    /// </summary>
+    public interface IContextExtensionBase : IContextInterfaceInfo, IDisposable
+    {
+        /// <summary>
+        /// The context that loaded this extension.
+        /// </summary>
+        IContextBase Context { get; }
+
+        /// <summary>
+        /// Require this extension.
+        /// </summary>
+        /// <param name="context">The context that required this extension.</param>
+        void Require(IContextBase context);
+    }
+
+    /// <summary>
+    /// Base interface for all context extensions.
+    /// </summary>
+    public interface IContextExtensionBase<TContext> : IContextExtensionBase
+        where TContext : IContextBase
+    {
+        /// <summary>
+        /// The context that loaded this extension.
+        /// </summary>
+        new TContext Context { get; }
+
+        /// <summary>
+        /// Require this extension.
+        /// </summary>
+        /// <param name="context">The context that required this extension.</param>
+        void Require(TContext context);
+    }
+}

Dashboard.Common/Pal/IContextDebugger.cs

@@ -0,0 +1,10 @@
+namespace Dashboard.Pal
+{
+    public interface IContextDebugger : IDisposable
+    {
+        void LogDebug(string message);
+        void LogInfo(string message);
+        void LogWarning(string message);
+        void LogError(string message);
+    }
+}

Dashboard.Common/Pal/IDeviceContextExtension.cs

@@ -0,0 +1,6 @@
+namespace Dashboard.Pal
+{
+    public interface IDeviceContextExtension : IContextExtensionBase<DeviceContext>
+    {
+    }
+}

Dashboard.Common/Windowing/ICompositor.cs

@@ -11,7 +11,7 @@ namespace Dashboard.Windowing
     /// <summary>
     /// Interface for classes that implement a window manager.
     /// </summary>
-    public interface IWindowManager : IEnumerable<IVirtualWindow>, IEventListener, IPaintable, IDisposable
+    public interface IWindowManager : IEnumerable<IVirtualWindow>, IEventListener
     {
         /// <summary>
         /// The physical window that this window manager is associated with.

Dashboard.Common/Windowing/IDeviceContext.cs

@@ -1,4 +1,5 @@
 using System.Drawing;
+using System.Numerics;
 
 namespace Dashboard.Windowing
 {
@@ -15,6 +16,6 @@ namespace Dashboard.Windowing
         /// <summary>
         /// The size of the window framebuffer in pixels.
         /// </summary>
-        Size FramebufferSize { get; }
+        Vector2 FramebufferSize { get; }
     }
 }

Dashboard.Common/Windowing/IEventListener.cs

@@ -2,10 +2,13 @@ namespace Dashboard.Windowing
 {
     public interface IEventListener
     {
+        event EventHandler? EventRaised;
+
         /// <summary>
         /// Send an event to this windowing object.
         /// </summary>
+        /// <param name="sender">The object which generated the event.</param>
         /// <param name="args">The event arguments sent.</param>
-        void SendEvent(EventArgs args);
+        void SendEvent(object? sender, EventArgs args);
     }
 }

Dashboard.Common/Windowing/IForm.cs

@@ -0,0 +1,8 @@
+namespace Dashboard.Windowing
+{
+    public interface IForm : IEventListener, IDisposable
+    {
+        public IWindow Window { get; }
+        public string Title { get; }
+    }
+}

Dashboard.Common/Windowing/IWindow.cs

@@ -1,17 +1,18 @@
 using System.Drawing;
-using Dashboard.Events;
+using Dashboard.Pal;
 
 namespace Dashboard.Windowing
 {
     /// <summary>
     /// Base class of all Dashboard windows.
     /// </summary>
-    public interface IWindow :
+    public interface IWindow : IDisposable
-        IPaintable,
-        IDisposable,
-        IAnimationTickEvent,
-        IMouseEvents
     {
+        /// <summary>
+        /// The application for this window.
+        /// </summary>
+        Application Application { get; }
+
         /// <summary>
         /// Name of the window.
         /// </summary>
@@ -26,6 +27,23 @@ namespace Dashboard.Windowing
         /// The size of the window that excludes the window extents.
         /// </summary>
         SizeF ClientSize { get; set; }
+
+        IForm? Form { get; set; }
+
+        public event EventHandler? EventRaised;
+
+        /// <summary>
+        /// Subscribe to events from this window.
+        /// </summary>
+        /// <param name="listener">The event listener instance.</param>
+        /// <returns>An unsubscription token.</returns>
+        public void SubcribeEvent(IEventListener listener);
+
+        /// <summary>
+        /// Unsubscribe from events in from this window.
+        /// </summary>
+        /// <param name="listener">The event listener to unsubscribe.</param>
+        public void UnsubscribeEvent(IEventListener listener);
     }
 
     /// <summary>
@@ -49,6 +67,7 @@ namespace Dashboard.Windowing
     /// </summary>
     public interface IVirtualWindow : IWindow, IEventListener
     {
+        IWindowManager? WindowManager { get; set; }
     }
 
     /// <summary>
@@ -59,7 +78,7 @@ namespace Dashboard.Windowing
         /// <summary>
         /// The device context for this window.
         /// </summary>
-        IDeviceContext DeviceContext { get; }
+        DeviceContext DeviceContext { get; }
 
         /// <summary>
         /// True if the window is double buffered.

Dashboard.Drawing.OpenGL/ContextExecutor.cs

@@ -1,6 +1,7 @@
 using System.Drawing;
 using Dashboard.Drawing.OpenGL.Executors;
 using Dashboard.OpenGL;
+using OpenTK.Mathematics;
 
 namespace Dashboard.Drawing.OpenGL
 {
@@ -130,10 +131,13 @@ namespace Dashboard.Drawing.OpenGL
 
         public void Draw(DrawQueue drawqueue) => Draw(drawqueue, new RectangleF(new PointF(0f,0f), Context.FramebufferSize));
 
-        public virtual void Draw(DrawQueue drawQueue, RectangleF bounds)
+        public virtual void Draw(DrawQueue drawQueue, RectangleF bounds, float scale = 1.0f)
         {
             BeginDraw();
 
+            if (scale != 1.0f)
+                TransformStack.Push(Matrix4.CreateScale(scale, scale, 1));
+
             foreach (ICommandFrame frame in drawQueue)
             {
                 if (_executorsMap.TryGetValue(frame.Command.Extension.Name, out ICommandExecutor? executor))

Dashboard.Drawing.OpenGL/Dashboard.Drawing.OpenGL.csproj

@@ -9,7 +9,6 @@
 
     <ItemGroup>
       <PackageReference Include="BlurgText" Version="0.1.0-nightly-19" />
-      <PackageReference Include="OpenTK.Graphics" Version="[5.0.0-pre*,5.1)" />
     </ItemGroup>
 
     <ItemGroup>
@@ -24,4 +23,8 @@
       <EmbeddedResource Include="Executors\text.frag" />
     </ItemGroup>
 
+    <ItemGroup>
+      <Folder Include="Text\" />
+    </ItemGroup>
+
 </Project>

Dashboard.Drawing.OpenGL/Executors/BaseCommandExecutor.cs

@@ -1,6 +1,7 @@
 using System.Drawing;
 using OpenTK.Graphics.OpenGL;
 using System.Numerics;
+using Dashboard.OpenGL;
 using OTK = OpenTK.Mathematics;
 
 namespace Dashboard.Drawing.OpenGL.Executors

Dashboard.Drawing.OpenGL/Executors/TextCommandExecutor.cs

@@ -1,7 +1,7 @@
 using System.Reflection;
 using System.Runtime.InteropServices;
 using BlurgText;
-using Dashboard.Drawing.OpenGL.Text;
+using Dashboard.OpenGL;
 using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
 
@@ -11,7 +11,7 @@ namespace Dashboard.Drawing.OpenGL.Executors
     {
         public IEnumerable<string> Extensions { get; } = new[] { "DB_Text" };
         public IContextExecutor Executor { get; private set; }
-        private BlurgEngine Engine => Executor.ResourcePool.GetResourceManager<BlurgEngine>();
+        // private BlurgEngine Engine => Executor.ResourcePool.GetResourceManager<BlurgEngine>();
         public bool IsInitialized { get; private set; }
 
         private DrawCallRecorder _recorder;
@@ -97,7 +97,7 @@ namespace Dashboard.Drawing.OpenGL.Executors
         private void DrawText(ICommandFrame frame)
         {
             TextCommandArgs args = frame.GetParameter<TextCommandArgs>();
-            DbBlurgFont font = Engine.InternFont(args.Font);
+            // DbBlurgFont font = Engine.InternFont(args.Font);
 
             BlurgColor color;
             switch (args.TextBrush)
@@ -116,15 +116,15 @@ namespace Dashboard.Drawing.OpenGL.Executors
                 break;
             }
 
-            BlurgResult? result = Engine.Blurg.BuildString(font.Font, font.Size, color, args.Text);
+            //BlurgResult? result = Engine.Blurg.BuildString(font.Font, font.Size, color, args.Text);
 
-            if (result == null)
+            // if (result == null)
-                return;
+            //     return;
-
+            //
-            Vector3 position = new Vector3(args.Position.X, args.Position.Y, args.Position.Z);
+            // Vector3 position = new Vector3(args.Position.X, args.Position.Y, args.Position.Z);
-            ExecuteBlurgResult(result, position);
+            // ExecuteBlurgResult(result, position);
-
+            //
-            result.Dispose();
+            // result.Dispose();
         }
 
         private void ExecuteBlurgResult(BlurgResult result, Vector3 position)

Dashboard.Drawing.OpenGL/GLEngine.cs

@@ -1,4 +1,4 @@
-using Dashboard.Drawing.OpenGL.Text;
+// using Dashboard.Drawing.OpenGL.Text;
 using Dashboard.OpenGL;
 using OpenTK;
 using OpenTK.Graphics;
@@ -21,7 +21,7 @@ namespace Dashboard.Drawing.OpenGL
             if (bindingsContext != null)
                 GLLoader.LoadBindings(bindingsContext);
 
-            Typesetter.Backend = BlurgEngine.Global;
+            // Typesetter.Backend = BlurgEngine.Global;
         }
 
         public ContextExecutor GetExecutor(IGLContext glContext)

Dashboard.Drawing.OpenGL/Text/BlurgEngine.cs

@@ -1,193 +0,0 @@
-using System.Diagnostics;
-using System.Drawing;
-using System.Numerics;
-using BlurgText;
-using Dashboard.OpenGL;
-using OpenTK.Graphics.OpenGL;
-using OPENGL = OpenTK.Graphics.OpenGL;
-
-namespace Dashboard.Drawing.OpenGL.Text
-{
-    public class BlurgEngine : IResourceManager, IGLDisposable, ITypeSetter
-    {
-        public string Name { get; } = "BlurgEngine";
-        public Blurg Blurg { get; }
-        public bool SystemFontsEnabled { get; }
-
-        private readonly List<int> _textures = new List<int>();
-
-        public BlurgEngine() : this(false)
-        {
-        }
-
-        private BlurgEngine(bool global)
-        {
-            if (global)
-                Blurg = new Blurg(AllocateTextureGlobal, UpdateTextureGlobal);
-            else
-                Blurg = new Blurg(AllocateTexture, UpdateTexture);
-
-            SystemFontsEnabled = Blurg.EnableSystemFonts();
-        }
-
-        ~BlurgEngine()
-        {
-            Dispose(false, true);
-        }
-
-        public SizeF MeasureString(IFont font, string value)
-        {
-            return MeasureStringInternal(InternFont(font), value);
-        }
-
-        private SizeF MeasureStringInternal(DbBlurgFont font, string value)
-        {
-            Vector2 v = Blurg.MeasureString(font.Font, font.Size, value);
-            return new SizeF(v.X, v.Y);
-        }
-
-        public IFont LoadFont(Stream stream)
-        {
-            string path;
-            Stream dest;
-            for (int i = 0;; i++)
-            {
-                path = Path.GetTempFileName();
-                try
-                {
-                    dest = File.Open(path, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
-                }
-                catch (IOException ex)
-                {
-                    if (i < 3)
-                        continue;
-                    else
-                        throw new Exception("Could not open a temporary file for writing the font.", ex);
-                }
-
-                break;
-            }
-
-            stream.CopyTo(dest);
-            dest.Dispose();
-
-            DbBlurgFont font = (DbBlurgFont)LoadFont(path);
-            return font;
-        }
-
-        public IFont LoadFont(string path)
-        {
-            BlurgFont? font = Blurg.AddFontFile(path) ?? throw new Exception("Failed to load the font file.");
-            return new DbBlurgFont(Blurg, font, 12f) { Path = path };
-        }
-
-        public IFont LoadFont(NamedFont font)
-        {
-            // Ignore the stretch argument.
-            bool italic = font.Slant != FontSlant.Normal;
-            BlurgFont? loaded = Blurg.QueryFont(font.Family, new BlurgText.FontWeight((int)font.Weight), italic);
-
-            if (loaded != null)
-                return new DbBlurgFont(Blurg, loaded, 12f);
-            else
-                throw new Exception("Font not found.");
-        }
-
-        public DbBlurgFont InternFont(IFont font)
-        {
-            if (font is NamedFont named)
-            {
-                return (DbBlurgFont)LoadFont(named);
-            }
-            else if (font is DbBlurgFont dblurg)
-            {
-                if (dblurg.Owner != Blurg)
-                {
-                    if (dblurg.Path == null)
-                        return (DbBlurgFont)LoadFont(new NamedFont(dblurg.Family, dblurg.Size, dblurg.Weight,
-                            dblurg.Slant,
-                            dblurg.Stretch));
-                    else
-                        return (DbBlurgFont)LoadFont(dblurg.Path);
-                }
-                else
-                {
-                    return dblurg;
-                }
-            }
-            else
-            {
-                throw new Exception("Unsupported font resource.");
-            }
-        }
-
-        private void UpdateTexture(IntPtr texture, IntPtr buffer, int x, int y, int width, int height)
-        {
-            GL.BindTexture(TextureTarget.Texture2d, (int)texture);
-            GL.TexSubImage2D(TextureTarget.Texture2d, 0, x, y, width, height, OPENGL.PixelFormat.Rgba, PixelType.UnsignedByte, buffer);
-            // GL.TexSubImage2D(TextureTarget.Texture2d, 0, x, y, width, height, OPENGL.PixelFormat.Red, PixelType.Byte, buffer);
-        }
-
-        private IntPtr AllocateTexture(int width, int height)
-        {
-            int texture = GL.GenTexture();
-
-            GL.BindTexture(TextureTarget.Texture2d, texture);
-            GL.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.Rgba, width, height, 0, OPENGL.PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
-            // GL.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.R8, width, height, 0, OPENGL.PixelFormat.Red, PixelType.Byte, IntPtr.Zero);
-
-            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
-            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
-            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleR, (int)TextureSwizzle.One);
-            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleG, (int)TextureSwizzle.One);
-            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleB, (int)TextureSwizzle.One);
-            // GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleA, (int)TextureSwizzle.Red);
-
-            _textures.Add(texture);
-
-            return texture;
-        }
-
-        private bool _isDisposed = false;
-
-        private void Dispose(bool disposing, bool safeExit)
-        {
-            if (_isDisposed)
-                return;
-            _isDisposed = true;
-
-            if (disposing)
-            {
-                Blurg.Dispose();
-                GC.SuppressFinalize(this);
-            }
-
-            if (safeExit)
-            {
-                foreach (int texture in _textures)
-                    ContextCollector.Global.DeleteTexture(texture);
-            }
-        }
-
-        public void Dispose() => Dispose(true, true);
-
-        public void Dispose(bool safeExit) => Dispose(true, safeExit);
-
-        /// <summary>
-        /// The global Blurg engine implements the needed methods for command queues to work.
-        /// </summary>
-        public static BlurgEngine Global { get; } = new BlurgEngine(true);
-
-        private static void UpdateTextureGlobal(IntPtr userdata, IntPtr buffer, int x, int y, int width, int height)
-        {
-            // Report the user error.
-            Debug.WriteLine("Attempt to create or update a texture from the global BlurgEngine.", "Dashboard/BlurgEngine");
-        }
-
-        private static IntPtr AllocateTextureGlobal(int width, int height)
-        {
-            Debug.WriteLine("Attempt to create or update  a texture from the global BlurgEngine.", "Dashboard/BlurgEngine");
-            return IntPtr.Zero;
-        }
-    }
-}

Dashboard.Drawing.OpenGL/Text/BlurgFontExtension.cs

@@ -1,13 +0,0 @@
-namespace Dashboard.Drawing.OpenGL.Text
-{
-    public class BlurgFontExtension : IDrawExtension
-    {
-        public string Name { get; } = "BLURG_Font";
-        public IReadOnlyList<IDrawExtension> Requires { get; } = new [] { FontExtension.Instance };
-        public IReadOnlyList<IDrawCommand> Commands { get; } = new IDrawCommand[] { };
-
-        private BlurgFontExtension() {}
-
-        public static readonly BlurgFontExtension Instance = new BlurgFontExtension();
-    }
-}

Dashboard.Drawing.OpenGL/Text/DbBlurgFont.cs

@@ -1,30 +0,0 @@
-using BlurgText;
-
-namespace Dashboard.Drawing.OpenGL.Text
-{
-    public class DbBlurgFont : IFont
-    {
-        public IDrawExtension Kind { get; } = BlurgFontExtension.Instance;
-        public Blurg Owner { get; }
-        public BlurgFont Font { get; }
-        public float Size { get; }
-        public string Family => Font.FamilyName;
-        public FontWeight Weight => (FontWeight)Font.Weight.Value;
-        public FontSlant Slant => Font.Italic ? FontSlant.Italic : FontSlant.Normal;
-        public FontStretch Stretch => FontStretch.Normal;
-
-        internal string? Path { get; init; }
-
-        public DbBlurgFont(Blurg owner, BlurgFont font, float size)
-        {
-            Owner = owner;
-            Font = font;
-            Size = size;
-        }
-
-        public DbBlurgFont WithSize(float size)
-        {
-            return new DbBlurgFont(Owner, Font, size);
-        }
-    }
-}

Dashboard.Drawing/DrawBuffer.cs

@@ -0,0 +1,26 @@
+using System.Numerics;
+
+namespace Dashboard.Drawing
+{
+    public enum DrawPrimitive
+    {
+        Point,
+        Line,
+        LineStrip,
+        Triangle,
+        TriangleFan,
+        TriangleStrip
+    }
+
+    public record struct DrawVertex(Vector3 Position, Vector3 TextureCoordinate, Vector4 Color);
+
+    public record DrawInfo(DrawPrimitive Primitive, int Count)
+    {
+
+    }
+
+    public class DrawBuffer
+    {
+
+    }
+}

Dashboard.Drawing/Font.cs

@@ -1,52 +0,0 @@
-using System.Linq;
-
-namespace Dashboard.Drawing
-{
-    public class FontExtension : DrawExtension
-    {
-        private FontExtension() : base("DB_Font", Enumerable.Empty<DrawExtension>())
-        {
-        }
-
-        public static readonly IDrawExtension Instance = new FontExtension();
-    }
-
-    public interface IFont : IDrawResource
-    {
-        public string Family { get; }
-        public float Size { get; }
-        public FontWeight Weight { get; }
-        public FontSlant Slant { get; }
-        public FontStretch Stretch { get; }
-    }
-
-    public struct NamedFont : IFont
-    {
-        public IDrawExtension Kind { get; } = Instance;
-
-        public string Family { get; }
-        public float Size { get; }
-        public FontWeight Weight { get; }
-        public FontSlant Slant { get; }
-        public FontStretch Stretch { get; }
-
-        public NamedFont(string family, float size, FontWeight weight = FontWeight.Normal,
-            FontSlant slant = FontSlant.Normal, FontStretch stretch = FontStretch.Normal)
-        {
-            Family = family;
-            Size = size;
-            Weight = weight;
-            Slant = slant;
-            Stretch = Stretch;
-        }
-
-        private static readonly IDrawExtension Instance = new Extension();
-
-        private class Extension : DrawExtension
-        {
-            public Extension() : base("DB_Font_Named", [FontExtension.Instance])
-            {
-            }
-        }
-    }
-}

Dashboard.Drawing/TextExtension.cs

@@ -9,7 +9,7 @@ namespace Dashboard.Drawing
     {
         public TextCommand TextCommand { get; }
 
-        private TextExtension() : base("DB_Text", new [] { FontExtension.Instance, BrushExtension.Instance })
+        private TextExtension() : base("DB_Text", new [] { BrushExtension.Instance })
         {
             TextCommand = new TextCommand(this);
         }
@@ -40,7 +40,7 @@ namespace Dashboard.Drawing
 
             header = new Header()
             {
-                Font = queue.RequireResource(obj.Font),
+                // Font = queue.RequireResource(obj.Font),
                 TextBrush = queue.RequireResource(obj.TextBrush),
                 BorderBrush = (obj.BorderBrush != null) ? queue.RequireResource(obj.BorderBrush) : -1,
                 BorderRadius = (obj.BorderBrush != null) ? obj.BorderRadius : 0f,

Dashboard.Drawing/Typesetter.cs

@@ -20,7 +20,7 @@ namespace Dashboard.Drawing
 
         IFont LoadFont(Stream stream);
         IFont LoadFont(string path);
-        IFont LoadFont(NamedFont font);
+        // IFont LoadFont(NamedFont font);
     }
 
     /// <summary>
@@ -55,15 +55,16 @@ namespace Dashboard.Drawing
             return Backend.LoadFont(file.FullName);
         }
 
-        public static IFont LoadFont(NamedFont font)
+        // public static IFont LoadFont(NamedFont font)
-        {
+        // {
-            return Backend.LoadFont(font);
+        //     return Backend.LoadFont(font);
-        }
+        // }
 
         public static IFont LoadFont(string family, float size, FontWeight weight = FontWeight.Normal,
             FontSlant slant = FontSlant.Normal, FontStretch stretch = FontStretch.Normal)
         {
-            return LoadFont(new NamedFont(family, size, weight, slant, stretch));
+            // return LoadFont(new NamedFont(family, size, weight, slant, stretch));
+            throw new Exception();
         }
 
         private class UndefinedTypeSetter : ITypeSetter
@@ -94,11 +95,11 @@ namespace Dashboard.Drawing
                 return default;
             }
 
-            public IFont LoadFont(NamedFont font)
+            // public IFont LoadFont(NamedFont font)
-            {
+            // {
-                Except();
+            //     Except();
-                return default;
+            //     return default;
-            }
+            // }
         }
     }
 }

Dashboard.ImmediateUI/Dashboard.ImmediateUI.csproj

@@ -6,8 +6,4 @@
         <Nullable>enable</Nullable>
     </PropertyGroup>
 
-    <ItemGroup>
-      <ProjectReference Include="..\Dashboard.Drawing\Dashboard.Drawing.csproj" />
-    </ItemGroup>
-
 </Project>

Dashboard.OpenGL/ContextCollector.cs

@@ -1,7 +1,7 @@
 using System.Collections.Concurrent;
 using OpenTK.Graphics.OpenGL;
 
-namespace Dashboard.Drawing.OpenGL
+namespace Dashboard.OpenGL
 {
     public class ContextCollector : IDisposable
     {

Dashboard.OpenGL/Dashboard.OpenGL.csproj

@@ -4,10 +4,19 @@
         <TargetFramework>net8.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     </PropertyGroup>
 
     <ItemGroup>
+      <PackageReference Include="OpenTK.Graphics" Version="[5.0.0-pre.*,5.1)" />
       <ProjectReference Include="..\Dashboard.Common\Dashboard.Common.csproj" />
     </ItemGroup>
 
+    <ItemGroup>
+      <None Remove="Drawing\immediate.frag" />
+      <EmbeddedResource Include="Drawing\immediate.frag" />
+      <None Remove="Drawing\immediate.vert" />
+      <EmbeddedResource Include="Drawing\immediate.vert" />
+    </ItemGroup>
+
 </Project>

Dashboard.OpenGL/Drawing/DeviceContextBase.cs

@@ -0,0 +1,167 @@
+using System.Drawing;
+using System.Numerics;
+using Dashboard.Drawing;
+using Dashboard.Pal;
+using Dashboard.Windowing;
+using OpenTK.Graphics.OpenGL;
+using OpenTK.Graphics.Wgl;
+using OpenTK.Mathematics;
+using ColorBuffer = OpenTK.Graphics.OpenGL.ColorBuffer;
+using Vector2 = System.Numerics.Vector2;
+
+namespace Dashboard.OpenGL.Drawing
+{
+    public class DeviceContextBase : IDeviceContextBase
+    {
+        private readonly Stack<Matrix4x4> _transforms = new Stack<Matrix4x4>();
+        private readonly Stack<Box2d> _clipRegions = new Stack<Box2d>();
+        private readonly Stack<Box2d> _scissorRegions = new Stack<Box2d>();
+        private int _z = 0;
+
+        public DeviceContext Context { get; private set; } = null!;
+        IContextBase IContextExtensionBase.Context => Context;
+        public string DriverName => "Dashboard OpenGL Device Context";
+        public string DriverVendor => "Dashboard";
+        public Version DriverVersion => new Version(0, 1);
+
+        public Box2d ClipRegion => _clipRegions.Peek();
+        public Box2d ScissorRegion => _scissorRegions.Peek();
+        public Matrix4x4 Transforms => _transforms.Peek();
+        public float Scale => ScaleOverride > 0 ? ScaleOverride : (Context.Window as IDpiAwareWindow)?.Scale ?? 1;
+        public float ScaleOverride { get; set; } = -1f;
+
+
+        public void Dispose()
+        {
+        }
+
+
+        public void Require(DeviceContext context)
+        {
+            Context = context;
+
+            ResetClip();
+            ResetScissor();
+            ResetTransforms();
+        }
+
+
+        void IContextExtensionBase.Require(IContextBase context) => Require((DeviceContext)context);
+
+        public void ResetClip()
+        {
+            _clipRegions.Clear();
+
+            Vector2 size = ((GLDeviceContext)Context).GLContext.FramebufferSize;
+            _clipRegions.Push(new Box2d(Vector2.Zero, size));
+
+            SetClip(ClipRegion);
+        }
+
+        public void PushClip(Box2d clipRegion)
+        {
+            clipRegion = new Box2d(ClipRegion.Min.X + clipRegion.Min.X, ClipRegion.Min.Y + clipRegion.Min.Y,
+                Math.Min(ClipRegion.Max.X, ClipRegion.Min.X + clipRegion.Max.X),
+                Math.Min(ClipRegion.Max.Y, ClipRegion.Max.Y + clipRegion.Max.Y));
+            _clipRegions.Push(clipRegion);
+
+            SetClip(clipRegion);
+        }
+
+        public void PopClip()
+        {
+            _clipRegions.Pop();
+            SetClip(ClipRegion);
+        }
+
+        public void ResetScissor()
+        {
+            GL.Disable(EnableCap.ScissorTest);
+            _scissorRegions.Clear();
+            Vector2 size = ((GLDeviceContext)Context).GLContext.FramebufferSize;
+            _scissorRegions.Push(new Box2d(Vector2.Zero, size));
+        }
+
+        public void PushScissor(Box2d scissorRegion)
+        {
+            GL.Enable(EnableCap.ScissorTest);
+
+            // scissorRegion = new RectangleF(scissorRegion.X + scissorRegion.X, scissorRegion.Y + scissorRegion.Y,
+            //     Math.Min(ScissorRegion.Right - scissorRegion.X, scissorRegion.Width),
+            //     Math.Min(ScissorRegion.Bottom - scissorRegion.Y, scissorRegion.Height));
+            _scissorRegions.Push(scissorRegion);
+
+            SetScissor(scissorRegion);
+        }
+
+        public void PopScissor()
+        {
+            if (_scissorRegions.Count == 1)
+                GL.Disable(EnableCap.ScissorTest);
+
+            _scissorRegions.Pop();
+            SetScissor(ClipRegion);
+        }
+
+        private void SetClip(Box2d rect)
+        {
+            Vector2 size = ((GLDeviceContext)Context).GLContext.FramebufferSize;
+            GL.Viewport(
+                (int)Math.Round(rect.Min.X),
+                (int)Math.Round(size.Y - rect.Min.Y - rect.Size.Y),
+                (int)Math.Round(rect.Size.X),
+                (int)Math.Round(rect.Size.Y));
+        }
+
+        void SetScissor(Box2d rect)
+        {
+            Vector2 size = ((GLDeviceContext)Context).GLContext.FramebufferSize;
+            GL.Scissor(
+                (int)Math.Round(rect.Min.X),
+                (int)Math.Round(size.Y - rect.Min.Y - rect.Size.Y),
+                (int)Math.Round(rect.Size.X),
+                (int)Math.Round(rect.Size.Y));
+        }
+
+        public void ResetTransforms()
+        {
+            Vector2 size = ((GLDeviceContext)Context).GLContext.FramebufferSize;
+            Matrix4x4 m  = Matrix4x4.CreateOrthographicOffCenterLeftHanded(0, size.X, size.Y, 0, 1, -1);
+
+            _transforms.Clear();
+            _transforms.Push(m);
+        }
+
+        public void PushTransforms(in Matrix4x4 matrix)
+        {
+            Matrix4x4 result = matrix * Transforms;
+            _transforms.Push(result);
+        }
+
+        public void PopTransforms()
+        {
+            _transforms.Pop();
+        }
+
+        public void ClearColor(Color color)
+        {
+            GL.ClearColor(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
+            GL.Clear(ClearBufferMask.ColorBufferBit);
+        }
+
+        public void ClearDepth()
+        {
+            GL.Clear(ClearBufferMask.DepthBufferBit);
+        }
+
+        public int IncrementZ()
+        {
+            return ++_z;
+        }
+
+        public int DecrementZ()
+        {
+            return --_z;
+        }
+    }
+}

Dashboard.OpenGL/Drawing/ImmediateMode.cs

@@ -0,0 +1,240 @@
+using System.Drawing;
+using System.Numerics;
+using System.Runtime;
+using System.Runtime.InteropServices;
+using Dashboard.Drawing;
+using Dashboard.Pal;
+using OpenTK.Graphics.OpenGL;
+
+namespace Dashboard.OpenGL.Drawing
+{
+    public class ImmediateMode : IImmediateMode
+    {
+        public string DriverName => "Dashboard OpenGL Immediate Mode";
+        public string DriverVendor => "Dashboard";
+        public Version DriverVersion { get; } = new Version(1, 0);
+
+        public DeviceContext Context { get; private set; } = null!;
+
+        private int _program;
+        private uint _program_apos;
+        private uint _program_atexcoord;
+        private uint _program_acolor;
+        private int _program_transforms;
+        private int _program_image;
+        private int _vao;
+        private int _white;
+
+        public void Dispose()
+        {
+        }
+
+        public void Require(DeviceContext context)
+        {
+            Context = context;
+
+            _program = GL.CreateProgram();
+
+            int vs = GL.CreateShader(ShaderType.VertexShader);
+
+            using (StreamReader reader = new StreamReader(GetType().Assembly
+                       .GetManifestResourceStream("Dashboard.OpenGL.Drawing.immediate.vert")!))
+            {
+                GL.ShaderSource(vs, reader.ReadToEnd());
+            }
+            GL.CompileShader(vs);
+            GL.AttachShader(_program, vs);
+
+            int fs = GL.CreateShader(ShaderType.FragmentShader);
+
+            using (StreamReader reader = new StreamReader(GetType().Assembly
+                       .GetManifestResourceStream("Dashboard.OpenGL.Drawing.immediate.frag")!))
+            {
+                GL.ShaderSource(fs, reader.ReadToEnd());
+            }
+
+            GL.CompileShader(fs);
+            GL.AttachShader(_program, fs);
+
+            GL.LinkProgram(_program);
+            GL.DeleteShader(vs); GL.DeleteShader(fs);
+
+            _program_apos = (uint)GL.GetAttribLocation(_program, "aPos");
+            _program_atexcoord = (uint)GL.GetAttribLocation(_program, "aTexCoords");
+            _program_acolor = (uint)GL.GetAttribLocation(_program, "aColor");
+
+            _program_transforms = GL.GetUniformLocation(_program, "transforms");
+            _program_image = GL.GetUniformLocation(_program, "image");
+
+            GL.GenTexture(out _white);
+            GL.BindTexture(TextureTarget.Texture2d, _white);
+            GL.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.Rgb, 1, 1, 0, OpenTK.Graphics.OpenGL.PixelFormat.Rgb, PixelType.Byte, IntPtr.Zero);
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleA, (int)All.One);
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleR, (int)All.One);
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleG, (int)All.One);
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureSwizzleB, (int)All.One);
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Nearest);
+            GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Nearest);
+
+            GL.GenVertexArray(out _vao);
+        }
+
+        public void ClearColor(Color color)
+        {
+            GL.ClearColor(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
+            GL.Clear(ClearBufferMask.ColorBufferBit);
+        }
+
+        public void Line(Vector2 a, Vector2 b, float width, float depth, Vector4 color)
+        {
+            Vector2 normal = Vector2.Normalize(b - a);
+            Vector2 tangent = new Vector2(-normal.Y, normal.X) * width;
+            Span<ImmediateVertex> vertices =
+            [
+                new ImmediateVertex(new Vector3(a-tangent, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(b-tangent, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(b+tangent, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(a-tangent, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(b+tangent, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(a+tangent, depth), Vector2.Zero, color),
+            ];
+
+            int buffer = GL.GenBuffer();
+            GL.BindBuffer(BufferTarget.ArrayBuffer, buffer);
+            GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * ImmediateVertex.Size, ref vertices[0], BufferUsage.StreamDraw);
+
+            GL.BindVertexArray(_vao);
+            GL.VertexAttribPointer(_program_apos, 3, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.PosOffset);
+            GL.EnableVertexAttribArray(_program_apos);
+            GL.VertexAttribPointer(_program_atexcoord, 2, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.TexCoordsOffset);
+            GL.EnableVertexAttribArray(_program_atexcoord);
+            GL.VertexAttribPointer(_program_acolor, 4, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.ColorOffset);
+            GL.EnableVertexAttribArray(_program_acolor);
+
+            Matrix4x4 view = Context.ExtensionRequire<IDeviceContextBase>().Transforms;
+
+            GL.UseProgram(_program);
+
+            GL.ActiveTexture(TextureUnit.Texture0);
+            GL.BindTexture(TextureTarget.Texture2d, _white);
+
+            GL.UniformMatrix4f(_program_transforms, 1, true, ref view);
+            GL.Uniform1i(_program_image, 0);
+
+            GL.DrawArrays(PrimitiveType.Triangles, 0, 6);
+
+            GL.DeleteBuffer(buffer);
+        }
+
+        public void Rectangle(Box2d rectangle, float depth, Vector4 color)
+        {
+            Span<ImmediateVertex> vertices =
+            [
+                new ImmediateVertex(new Vector3(rectangle.Min.X, rectangle.Min.Y, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(rectangle.Max.X, rectangle.Min.Y, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(rectangle.Max.X, rectangle.Max.Y, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(rectangle.Min.X, rectangle.Min.Y, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(rectangle.Max.X, rectangle.Max.Y, depth), Vector2.Zero, color),
+                new ImmediateVertex(new Vector3(rectangle.Min.X, rectangle.Max.Y, depth), Vector2.Zero, color),
+            ];
+
+            int buffer = GL.GenBuffer();
+            GL.BindBuffer(BufferTarget.ArrayBuffer, buffer);
+            GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * ImmediateVertex.Size, ref vertices[0], BufferUsage.StreamDraw);
+
+            GL.BindVertexArray(_vao);
+            GL.VertexAttribPointer(_program_apos, 3, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.PosOffset);
+            GL.EnableVertexAttribArray(_program_apos);
+            GL.VertexAttribPointer(_program_atexcoord, 2, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.TexCoordsOffset);
+            GL.EnableVertexAttribArray(_program_atexcoord);
+            GL.VertexAttribPointer(_program_acolor, 4, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.ColorOffset);
+            GL.EnableVertexAttribArray(_program_acolor);
+
+            Matrix4x4 view = Context.ExtensionRequire<IDeviceContextBase>().Transforms;
+
+            GL.UseProgram(_program);
+
+            GL.ActiveTexture(TextureUnit.Texture0);
+            GL.BindTexture(TextureTarget.Texture2d, _white);
+
+            GL.UniformMatrix4f(_program_transforms, 1, true, ref view);
+            GL.Uniform1i(_program_image, 0);
+
+            GL.DrawArrays(PrimitiveType.Triangles, 0, 6);
+
+            GL.DeleteBuffer(buffer);
+        }
+
+        public void Rectangle(in RectangleDrawInfo rectangle)
+        {
+            // TODO: implement this better.
+            int z = Context.ExtensionRequire<IDeviceContextBase>().IncrementZ();
+            Color color = (rectangle.Fill as SolidColorBrush)?.Color ?? Color.LightGray;
+            Vector4 colorV = new Vector4(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
+            Vector4 margin = rectangle.Box.Margin;
+            Vector4 border = rectangle.Box.Border;
+            Vector2 size = rectangle.Box.Size + new Vector2(border.X + border.Z, border.Y = border.W);
+            Box2d box = Box2d.FromPositionAndSize(rectangle.Position + new Vector2(margin.X + border.X, margin.Y + border.Y), size);
+
+            Rectangle(box, z, colorV);
+        }
+
+        public void Image(Box2d rectangle, Box2d uv, float depth, ITexture texture)
+        {
+            Span<ImmediateVertex> vertices =
+            [
+                new ImmediateVertex(new Vector3(rectangle.Min.X, rectangle.Min.Y, depth), new Vector2(uv.Min.X, uv.Min.Y), Vector4.One),
+                new ImmediateVertex(new Vector3(rectangle.Max.X, rectangle.Min.Y, depth), new Vector2(uv.Max.X, uv.Min.Y), Vector4.One),
+                new ImmediateVertex(new Vector3(rectangle.Max.X, rectangle.Max.Y, depth), new Vector2(uv.Max.X, uv.Max.Y), Vector4.One),
+                new ImmediateVertex(new Vector3(rectangle.Min.X, rectangle.Min.Y, depth), new Vector2(uv.Min.X, uv.Min.Y), Vector4.One),
+                new ImmediateVertex(new Vector3(rectangle.Max.X, rectangle.Max.Y, depth), new Vector2(uv.Max.X, uv.Max.Y), Vector4.One),
+                new ImmediateVertex(new Vector3(rectangle.Min.X, rectangle.Max.Y, depth), new Vector2(uv.Min.X, uv.Max.Y), Vector4.One),
+            ];
+
+            int buffer = GL.GenBuffer();
+            GL.BindBuffer(BufferTarget.ArrayBuffer, buffer);
+            GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length * ImmediateVertex.Size, ref vertices[0], BufferUsage.StreamDraw);
+
+            GL.BindVertexArray(_vao);
+            GL.VertexAttribPointer(_program_apos, 3, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.PosOffset);
+            GL.EnableVertexAttribArray(_program_apos);
+            GL.VertexAttribPointer(_program_atexcoord, 2, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.TexCoordsOffset);
+            GL.EnableVertexAttribArray(_program_atexcoord);
+            GL.VertexAttribPointer(_program_acolor, 4, VertexAttribPointerType.Float, false, ImmediateVertex.Size, ImmediateVertex.ColorOffset);
+            GL.EnableVertexAttribArray(_program_acolor);
+            Matrix4x4 view = Context.ExtensionRequire<IDeviceContextBase>().Transforms;
+
+            GL.UseProgram(_program);
+
+            GL.ActiveTexture(TextureUnit.Texture0);
+            GL.BindTexture(TextureTarget.Texture2d, ((GLTexture)texture).Handle);
+
+            GL.UniformMatrix4f(_program_transforms, 1, true, ref view);
+            GL.Uniform1i(_program_image, 0);
+
+            GL.DrawArrays(PrimitiveType.Triangles, 0, 6);
+
+            GL.DeleteBuffer(buffer);
+        }
+
+        IContextBase IContextExtensionBase.Context => Context;
+
+        void IContextExtensionBase.Require(IContextBase context)
+        {
+            Require((DeviceContext)context);
+        }
+
+        [StructLayout(LayoutKind.Explicit, Pack = sizeof(float) * 4, Size = Size)]
+        private struct ImmediateVertex(Vector3 position, Vector2 texCoords, Vector4 color)
+        {
+            [FieldOffset(PosOffset)]       public Vector3 Position = position;
+            [FieldOffset(TexCoordsOffset)] public Vector2 TexCoords = texCoords;
+            [FieldOffset(ColorOffset)]     public Vector4 Color = color;
+
+            public const int Size = 16 * sizeof(float);
+            public const int PosOffset = 0 * sizeof(float);
+            public const int TexCoordsOffset = 4 * sizeof(float);
+            public const int ColorOffset = 8 * sizeof(float);
+        }
+    }
+}

Dashboard.OpenGL/Drawing/immediate.frag

@@ -0,0 +1,12 @@
+#version 130
+
+uniform sampler2D image;
+
+in vec2 vTexCoords;
+in vec4 vColor;
+
+out vec4 fragColor;
+
+void main() {
+    fragColor = vColor * texture(image, vTexCoords);
+}

Dashboard.OpenGL/Drawing/immediate.vert

@@ -0,0 +1,18 @@
+#version 130
+
+uniform mat4 transforms;
+
+in vec3 aPos;
+in vec2 aTexCoords;
+in vec4 aColor;
+
+out vec2 vTexCoords;
+out vec4 vColor;
+
+void main() {
+    vec4 position = vec4(aPos, 1.0) * transforms;
+    gl_Position = position;
+
+    vTexCoords = aTexCoords;
+    vColor = aColor;
+}

Dashboard.OpenGL/GLDeviceContext.cs

@@ -0,0 +1,169 @@
+using System.Collections.Concurrent;
+using System.Collections.Immutable;
+using Dashboard.Drawing;
+using Dashboard.OpenGL.Drawing;
+using Dashboard.Pal;
+using Dashboard.Windowing;
+using OpenTK;
+using OpenTK.Graphics;
+using OpenTK.Graphics.OpenGL;
+
+namespace Dashboard.OpenGL
+{
+    internal class GLContextBindingsContext(IGLContext context) : IBindingsContext
+    {
+        public IntPtr GetProcAddress(string procName)
+        {
+            return context.GetProcAddress(procName);
+        }
+    }
+
+    public class GLDeviceContext : DeviceContext
+    {
+        public IGLContext GLContext { get; }
+
+        public ContextCollector Collector { get; } = new ContextCollector();
+
+        public override string DriverName     => "Dashboard OpenGL Device Context";
+        public override string DriverVendor   => "Dashboard";
+        public override Version DriverVersion => new Version(0, 1, 0);
+
+        public Version GLVersion { get; }
+        public string GLRenderer { get; }
+        public string GLVendor { get; }
+        public ImmutableHashSet<string> Extensions { get; }
+
+        public Thread RendererThread { get; } = Thread.CurrentThread;
+        public bool IsRenderThread => RendererThread == Thread.CurrentThread;
+
+        private readonly ConcurrentQueue<Task> _beforeDrawActions = new ConcurrentQueue<Task>();
+        private readonly ConcurrentQueue<Task> _afterDrawActions = new ConcurrentQueue<Task>();
+
+        public GLDeviceContext(Application app, IWindow? window, IGLContext context) : base(app, window)
+        {
+            GLContext = context;
+            context.MakeCurrent();
+            GLLoader.LoadBindings(new GLContextBindingsContext(context));
+
+            context.Disposed += Dispose;
+
+            GL.GetInteger(GetPName.MajorVersion, out int major);
+            GL.GetInteger(GetPName.MinorVersion, out int minor);
+            GLVersion = new Version(major, minor);
+
+            GLRenderer = GL.GetString(StringName.Renderer) ?? string.Empty;
+            GLVendor = GL.GetString(StringName.Vendor) ?? string.Empty;
+
+            HashSet<string> extensions = new HashSet<string>();
+            GL.GetInteger(GetPName.NumExtensions, out int extensionCount);
+            for (uint i = 0; i < extensionCount; i++)
+            {
+                string? ext = GL.GetStringi(StringName.Extensions, i);
+                if (ext != null)
+                    extensions.Add(ext);
+            }
+
+            Extensions = extensions.ToImmutableHashSet();
+
+            ExtensionPreload<DeviceContextBase>();
+            ExtensionPreload<GLTextureExtension>();
+            ExtensionPreload<ImmediateMode>();
+        }
+
+        public bool IsGLExtensionAvailable(string name)
+        {
+            return Extensions.Contains(name);
+        }
+
+        public void AssertGLExtension(string name)
+        {
+            if (IsGLExtensionAvailable(name))
+                return;
+
+            throw new NotSupportedException($"The OpenGL extension \"{name}\" is not supported by this context.");
+        }
+
+        public void InvokeBeforeDraw(Task task) => _beforeDrawActions.Enqueue(task);
+
+        public void InvokeAfterDraw(Task task) => _afterDrawActions.Enqueue(task);
+
+        public Task InvokeBeforeDraw(Action action)
+        {
+            Task task = new Task(action);
+            _beforeDrawActions.Enqueue(task);
+            return task;
+        }
+
+        public Task InvokeAfterDraw(Action action)
+        {
+            Task task = new Task(action);
+            _afterDrawActions.Enqueue(task);
+            return task;
+        }
+
+        public Task<T> InvokeBeforeDraw<T>(Func<T> function)
+        {
+            Task<T> task = new Task<T>(function);
+            _beforeDrawActions.Enqueue(task);
+            return task;
+        }
+
+        public Task<T> InvokeAfterDraw<T>(Func<T> function)
+        {
+            Task<T> task = new Task<T>(function);
+            _afterDrawActions.Enqueue(task);
+            return task;
+        }
+
+        public Task InvokeOnRenderThread(Action action)
+        {
+            if (IsRenderThread)
+            {
+                action();
+                return Task.CompletedTask;
+            }
+
+            return InvokeBeforeDraw(action);
+        }
+
+        public Task<T> InvokeOnRenderThread<T>(Func<T> function)
+        {
+            return IsRenderThread ? Task.FromResult(function()) : InvokeBeforeDraw(function);
+        }
+
+        public override void Begin()
+        {
+            base.Begin();
+
+            GLContext.MakeCurrent();
+            IDeviceContextBase dc = ExtensionRequire<IDeviceContextBase>();
+            dc.ResetClip();
+            dc.ResetTransforms();
+
+            while (_beforeDrawActions.TryDequeue(out Task? action))
+            {
+                action.RunSynchronously();
+            }
+        }
+
+        public override void End()
+        {
+            base.End();
+
+            while (_afterDrawActions.TryDequeue(out Task? action))
+            {
+                action.RunSynchronously();
+            }
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (isDisposing)
+            {
+                GLContext.Disposed -= Dispose;
+            }
+        }
+    }
+}

Dashboard.OpenGL/GLTextureExtension.cs

@@ -0,0 +1,306 @@
+using System.Drawing;
+using Dashboard.Drawing;
+using Dashboard.Pal;
+using OpenTK.Graphics.OpenGL;
+using OGL = OpenTK.Graphics.OpenGL;
+
+namespace Dashboard.OpenGL
+{
+    public class GLTextureExtension : ITextureExtension, IContextExtensionBase<GLDeviceContext>
+    {
+        public string DriverName => "Dashboard OpenGL Texture Extension";
+        public string DriverVendor => "Dashboard";
+        public Version DriverVersion => new Version(0, 1, 0);
+        public GLDeviceContext Context { get; private set; } = null!;
+        public bool SupportsArbTextureStorage { get; private set; }
+        public bool SupportsAnisotropy { get; private set; }
+
+        IContextBase IContextExtensionBase.Context => Context;
+        DeviceContext IContextExtensionBase<DeviceContext>.Context => Context;
+
+        private List<GLTexture> _textures = new List<GLTexture>();
+
+        public void Dispose()
+        {
+        }
+
+
+        public void Require(GLDeviceContext context)
+        {
+            Context = context;
+
+            SupportsArbTextureStorage = Context.DriverVersion >= new Version(4, 2) ||
+                                        Context.IsGLExtensionAvailable("GL_ARB_texture_storage");
+            SupportsAnisotropy = Context.DriverVersion >= new Version() ||
+                                 Context.IsGLExtensionAvailable("GL_EXT_texture_filter_anisotropic") ||
+                                 Context.IsGLExtensionAvailable("GL_ARB_texture_filter_anisotropic");
+        }
+        public void Require(DeviceContext context) => Require((GLDeviceContext)context);
+        public void Require(IContextBase context) => Require((GLDeviceContext)context);
+
+
+
+        public GLTexture CreateTexture(TextureType type)
+        {
+            GLTexture texture = new GLTexture(this, type);
+            lock (_textures) _textures.Add(texture);
+            return texture;
+        }
+
+        internal void TextureDisposed(GLTexture texture)
+        {
+            lock (_textures) _textures.Remove(texture);
+        }
+
+        ITexture ITextureExtension.CreateTexture(TextureType type) => CreateTexture(type);
+    }
+
+    public class GLTexture(GLTextureExtension extension, TextureType type) : ITexture
+    {
+        public int Handle { get; private set; } = 0;
+        public bool IsValid => Handle != 0;
+
+        public TextureType Type { get; } = type;
+        public PixelFormat Format { get; private set; } = PixelFormat.Rgba8I;
+        public ColorSwizzle Swizzle { get; set; } = ColorSwizzle.Default;
+        public TextureFilter MinifyFilter { get; set; } = TextureFilter.Linear;
+        public TextureFilter MagnifyFilter { get; set; } = TextureFilter.Linear;
+        public Color BorderColor { get; set; } = Color.White;
+        public TextureRepeat RepeatS { get; set; } = TextureRepeat.Repeat;
+        public TextureRepeat RepeatT { get; set; } = TextureRepeat.Repeat;
+        public TextureRepeat RepeatR { get; set; } = TextureRepeat.Repeat;
+        public int Anisotropy { get; set; } = 0;
+
+        public int Width { get; private set; } = 0;
+        public int Height { get; private set; } = 0;
+        public int Depth { get; private set; } = 0;
+        public int Levels { get; private set; } = 0;
+        public bool Premultiplied { get; set; } = false;
+
+        private TextureTarget Target { get; } = type switch
+        {
+            TextureType.Texture1D => TextureTarget.Texture1d,
+            TextureType.Texture2D => TextureTarget.Texture2d,
+            TextureType.Texture3D => TextureTarget.Texture3d,
+            TextureType.Texture2DArray => TextureTarget.Texture2dArray,
+            TextureType.Texture2DCube => TextureTarget.TextureCubeMap,
+            _ => throw new NotSupportedException()
+        };
+
+        private GLTextureExtension Extension { get; } = extension;
+        private GLDeviceContext Context => Extension.Context;
+
+        ~GLTexture()
+        {
+            Dispose(false);
+        }
+
+        public void SetStorage(PixelFormat format, int width, int height, int depth, int levels)
+        {
+            if (!Context.IsRenderThread)
+            {
+                Context.InvokeBeforeDraw(() => SetStorage(format, width, height, depth, levels)).Wait();
+                return;
+            }
+
+            if (levels == 0)
+            {
+                levels = Math.Max(Math.ILogB(width), Math.ILogB(height));
+            }
+
+            Bind();
+            SizedInternalFormat glFormat = GetFormat(format);
+            if (Extension.SupportsArbTextureStorage)
+            {
+                switch (Type)
+                {
+                    case TextureType.Texture1D:
+                        GL.TexStorage1D(Target, levels, glFormat, width);
+                        break;
+                    case TextureType.Texture2D:
+                        GL.TexStorage2D(Target, levels, glFormat, width, height);
+                        break;
+                    case TextureType.Texture3D:
+                    case TextureType.Texture2DArray:
+                    case TextureType.Texture2DCube:
+                        GL.TexStorage3D(Target, levels, glFormat, width, height, depth);
+                        break;
+                }
+            }
+            else
+            {
+                switch (Type)
+                {
+                    case TextureType.Texture1D:
+                        GL.TexImage1D(Target, 0, (InternalFormat)glFormat, width, 0, (OGL.PixelFormat)glFormat, PixelType.UnsignedByte, IntPtr.Zero);
+                        break;
+                    case TextureType.Texture2D:
+                        GL.TexImage2D(Target, 0, (InternalFormat)glFormat, width, height, 0, (OGL.PixelFormat)glFormat, PixelType.UnsignedByte, IntPtr.Zero);
+                        break;
+                    case TextureType.Texture3D:
+                    case TextureType.Texture2DArray:
+                    case TextureType.Texture2DCube:
+                        GL.TexImage3D(Target, 0, (InternalFormat)glFormat, width, height, depth, 0, (OGL.PixelFormat)glFormat, PixelType.UnsignedByte, IntPtr.Zero);
+                        break;
+                }
+            }
+
+            Width = width;
+            Height = height;
+            Depth = depth;
+            Levels = levels;
+        }
+
+        public void Read<T>(Span<T> buffer, int level = 0, int align = 0) where T : unmanaged
+        {
+            throw new NotImplementedException();
+        }
+
+        void ITexture.Write<T>(PixelFormat format, ReadOnlySpan<T> buffer, int level, int align) => Write(format, buffer, level, align, null);
+
+        public unsafe void Write<T>(PixelFormat format, ReadOnlySpan<T> buffer, int level = 0, int align = 4, TimeSpan? timeout = null) where T : unmanaged
+        {
+            if (!Context.IsRenderThread)
+            {
+                T[] bufferArray = buffer.ToArray();
+                Task task = Context.InvokeBeforeDraw(() => Write<T>(format, bufferArray, level, align));
+
+                if (timeout.HasValue)
+                    task.Wait(timeout.Value);
+                else
+                    task.Wait();
+            }
+
+            Bind();
+            OGL::PixelFormat glFormat = format switch
+            {
+                PixelFormat.R8I or PixelFormat.R16F => OGL.PixelFormat.Red,
+                PixelFormat.Rg8I or PixelFormat.Rg16F => OGL.PixelFormat.Rg,
+                PixelFormat.Rgb8I or PixelFormat.Rgb16F => OGL.PixelFormat.Rgb,
+                PixelFormat.Rgba8I or PixelFormat.Rgba16F => OGL.PixelFormat.Rgba,
+                _ => throw new NotSupportedException()
+            };
+
+            PixelType glType = format switch
+            {
+                PixelFormat.R8I or PixelFormat.Rg8I or PixelFormat.Rgb8I or PixelFormat.Rgba8I => PixelType.UnsignedByte,
+                PixelFormat.R16F or PixelFormat.Rg16F or PixelFormat.Rgb16F or PixelFormat.Rgba16F => PixelType.HalfFloat,
+                _ => throw new NotSupportedException()
+            };
+
+            GL.PixelStorei(PixelStoreParameter.UnpackAlignment, align);
+            fixed (T* ptr = buffer)
+            {
+                switch (Type)
+                {
+                    case TextureType.Texture1D:
+                        GL.TexSubImage1D(Target, level, 0, Width, glFormat, glType, ptr);
+                        break;
+                    case TextureType.Texture2D:
+                        GL.TexSubImage2D(Target, level, 0, 0, Width, Height, glFormat, glType, ptr);
+                        break;
+                    case TextureType.Texture2DCube:
+                    case TextureType.Texture3D:
+                    case TextureType.Texture2DArray:
+                        GL.TexSubImage3D(Target, level, 0, 0, 0, Width, Height, Depth, glFormat, glType, ptr);
+                        break;
+                }
+            }
+        }
+
+        public void Premultiply()
+        {
+            throw new NotImplementedException();
+        }
+
+        public void Unmultiply()
+        {
+            throw new NotImplementedException();
+        }
+
+        public void GenerateMipmaps()
+        {
+            if (!Context.IsRenderThread)
+            {
+                Context.InvokeBeforeDraw(GenerateMipmaps).Wait();
+                return;
+            }
+
+            Bind();
+            GL.GenerateMipmap(Target);
+        }
+
+        private void Dispose(bool disposing)
+        {
+            if (IsDisposed)
+                return;
+            IsDisposed = true;
+
+            if (disposing)
+            {
+                if (Thread.CurrentThread != Context.RendererThread)
+                {
+                    Context.Collector.DeleteTexture(Handle);
+                }
+                else
+                {
+                    GL.DeleteTexture(Handle);
+                }
+
+                Handle = 0;
+
+                GC.SuppressFinalize(this);
+            }
+            else
+            {
+                Context.Collector.DeleteTexture(Handle);
+            }
+        }
+
+        public bool IsDisposed { get; private set; }
+
+        public void Dispose() => Dispose(false);
+
+        private void Bind()
+        {
+            if (Handle == 0)
+            {
+                Handle = GL.GenTexture();
+            }
+
+            GL.BindTexture(Target, Handle);
+        }
+
+        private static SizedInternalFormat GetFormat(PixelFormat format)
+        {
+            return format switch
+            {
+                PixelFormat.R8I => SizedInternalFormat.R8,
+                PixelFormat.R16F => SizedInternalFormat.R16f,
+                PixelFormat.Rg8I => SizedInternalFormat.Rg8,
+                PixelFormat.Rg16F => SizedInternalFormat.Rg16f,
+                PixelFormat.Rgb8I => SizedInternalFormat.Rgb8,
+                PixelFormat.Rgb16F => SizedInternalFormat.Rgb16f,
+                PixelFormat.Rgba8I => SizedInternalFormat.Rgba8,
+                PixelFormat.Rgba16F => SizedInternalFormat.Rgba16f,
+                _ => throw new ArgumentOutOfRangeException()
+            };
+        }
+
+        private static PixelFormat GetFormat(SizedInternalFormat format)
+        {
+            return format switch
+            {
+                SizedInternalFormat.R8 => PixelFormat.R8I,
+                SizedInternalFormat.R16f => PixelFormat.R16F,
+                SizedInternalFormat.Rg8 => PixelFormat.Rg8I,
+                SizedInternalFormat.Rg16f => PixelFormat.Rg16F,
+                SizedInternalFormat.Rgb8 => PixelFormat.Rgb8I,
+                SizedInternalFormat.Rgb16f => PixelFormat.Rgb16F,
+                SizedInternalFormat.Rgba8 => PixelFormat.Rgba8I,
+                SizedInternalFormat.Rgba16f => PixelFormat.Rgba16F,
+                _ => throw new ArgumentOutOfRangeException()
+            };
+        }
+    }
+}

Dashboard.OpenGL/IGLContext.cs

@@ -1,4 +1,4 @@
-using System.Drawing;
+using System.Numerics;
 using Dashboard.Windowing;
 
 namespace Dashboard.OpenGL
@@ -17,7 +17,7 @@ namespace Dashboard.OpenGL
         /// <summary>
         /// The size of the framebuffer in pixels.
         /// </summary>
-        public Size FramebufferSize { get; }
+        public Vector2 FramebufferSize { get; }
 
         /// <summary>
         /// Called when the context is disposed.
@@ -28,5 +28,7 @@ namespace Dashboard.OpenGL
         /// Activate this OpenGL Context.
         /// </summary>
         void MakeCurrent();
+
+        IntPtr GetProcAddress(string procName);
     }
 }

Dashboard.OpenGL/ShaderUtil.cs

@@ -1,6 +1,6 @@
 using OpenTK.Graphics.OpenGL;
 
-namespace Dashboard.Drawing.OpenGL
+namespace Dashboard.OpenGL
 {
     public static class ShaderUtil
     {

Dashboard.OpenTK/PAL2/EventConverter.cs

@@ -1,18 +0,0 @@
-using Dashboard.Events;
-using OpenTK.Platform;
-
-namespace Dashboard.OpenTK.PAL2
-{
-    public static class EventConverter
-    {
-        public static UiEventArgs? Convert(PlatformEventType type, EventArgs ea)
-        {
-            switch (type)
-            {
-                case PlatformEventType.KeyDown:
-                default:
-                    return null;
-            }
-        }
-    }
-}

Dashboard.OpenTK/PAL2/OpenTKEventExtensions.cs

@@ -1,7 +0,0 @@
-namespace Dashboard.OpenTK.PAL2
-{
-    public static class OpenTKEventExtensions
-    {
-        // public static EventArgs ToDashboardEvent(this EventArgs)
-    }
-}

Dashboard.OpenTK/PAL2/Pal2Application.cs

@@ -0,0 +1,285 @@
+using System.Diagnostics;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using Dashboard.Events;
+using Dashboard.OpenGL;
+using Dashboard.Pal;
+using Dashboard.Windowing;
+using OpenTK.Platform;
+using TK = OpenTK.Platform.Toolkit;
+using OPENTK = OpenTK.Platform;
+using DB = Dashboard.Events;
+
+namespace Dashboard.OpenTK.PAL2
+{
+    public class Pal2Application : Application
+    {
+        public override string DriverName => "Dashboard OpenTK PAL2.0 Driver";
+        public override string DriverVendor => "Dashboard";
+        public override Version DriverVersion => new Version(0, 1);
+        public GraphicsApiHints GraphicsApiHints { get; set; } = new OpenGLGraphicsApiHints();
+
+        private readonly List<PhysicalWindow> _windows = new List<PhysicalWindow>();
+
+        private readonly ConditionalWeakTable<WindowHandle, WindowExtraInfo> _windowHandleWindowMap =
+            new ConditionalWeakTable<WindowHandle, WindowExtraInfo>();
+
+        private long _tick = Stopwatch.GetTimestamp();
+
+        public override IPhysicalWindow CreatePhysicalWindow()
+        {
+            PhysicalWindow window = new PhysicalWindow(this, GraphicsApiHints);
+
+            _windows.Add(window);
+            _windowHandleWindowMap.Add(window.WindowHandle, new WindowExtraInfo(window));
+
+            return window;
+        }
+
+        public override IWindow CreateWindow()
+        {
+            return CreatePhysicalWindow();
+        }
+
+        protected override void InitializeInternal()
+        {
+            base.InitializeInternal();
+            CancellationToken?.Register(() =>
+            {
+                TK.Window.PostUserEvent(new ApplicationQuitEventArgs());
+            });
+
+            EventQueue.EventRaised += OnEventRaised;
+        }
+
+        internal void RemoveWindow(PhysicalWindow window)
+        {
+            _windows.Remove(window);
+        }
+
+        public override void RunEvents(bool wait)
+        {
+            if (_windows.Count == 0)
+            {
+                Dispose();
+                return;
+            }
+
+            TK.Window.ProcessEvents(wait);
+
+            long tock = Stopwatch.GetTimestamp();
+            long elapsed = _tick - tock;
+            float delta = (float)elapsed / Stopwatch.Frequency;
+            TickEventArgs tickEvent = new TickEventArgs(delta);
+
+            _tick = tock;
+
+            for (int i = 0; i < _windows.Count; i++)
+            {
+                PhysicalWindow window = _windows[i];
+
+                if (window.IsDisposed)
+                {
+                    _windows.RemoveAt(i);
+                    continue;
+                }
+
+                window.SendEvent(this, tickEvent);
+                window.SendEvent(this, new PaintEventArgs(window.DeviceContext));
+                // For now we swap each window individually.
+                ((GLDeviceContext)window.DeviceContext).GLContext.SwapGroup.Swap();
+            }
+        }
+
+        private void OnEventRaised(PalHandle? handle, PlatformEventType type, EventArgs args)
+        {
+            if (handle is WindowHandle window)
+            {
+                OnWindowEventRaised(window, type, args);
+                return;
+            }
+            else
+            {
+                // System.Diagnostics.Debugger.Break();
+            }
+        }
+
+        private void OnWindowEventRaised(WindowHandle handle, PlatformEventType type, EventArgs args)
+        {
+            if (!_windowHandleWindowMap.TryGetValue(handle, out WindowExtraInfo? info))
+            {
+                Debugger?.LogDebug($"Unknown window handle {handle} received from OpenTK.");
+                return;
+            }
+
+            switch (type)
+            {
+                case PlatformEventType.UserMessage:
+                    if (args is ApplicationQuitEventArgs)
+                    {
+                        Quit = true;
+                        return;
+                    }
+                    break;
+                // Mouse Events
+                case PlatformEventType.MouseDown:
+                {
+                    MouseButtonDownEventArgs down = (MouseButtonDownEventArgs)args;
+                    MouseButtons buttons = (MouseButtons)(1 << (int)down.Button);
+                    ModifierKeys modifierKeys = GetModifierKeys(down.Modifiers);
+                    // TODO: modifier keys
+                    MouseButtonEventArgs down2 = new MouseButtonEventArgs(info.MousePosition, buttons, modifierKeys, false);
+                    info.Window.SendEvent(this, down2);
+                    break;
+                }
+                case PlatformEventType.MouseUp:
+                {
+                    MouseButtonUpEventArgs up = (MouseButtonUpEventArgs)args;
+                    MouseButtons buttons = (MouseButtons)(1 << (int)up.Button);
+                    ModifierKeys modifierKeys = GetModifierKeys(up.Modifiers);
+                    // TODO: modifier keys
+                    MouseButtonEventArgs up2 = new MouseButtonEventArgs(info.MousePosition, buttons, modifierKeys, true);
+                    info.Window.SendEvent(this, up2);
+                    break;
+                }
+                case PlatformEventType.MouseMove:
+                {
+                    OPENTK.MouseMoveEventArgs move = (OPENTK.MouseMoveEventArgs)args;
+                    Vector2 position = new Vector2(move.ClientPosition.X, move.ClientPosition.Y);
+                    DB.MouseMoveEventArgs move2 = new DB.MouseMoveEventArgs(position, position - info.MousePosition);
+
+                    info.MousePosition = position;
+
+                    info.Window.SendEvent(this, move2);
+                    break;
+                }
+                case PlatformEventType.Scroll:
+                {
+                    ScrollEventArgs scroll = (ScrollEventArgs)args;
+                    Vector2 distance = new Vector2(scroll.Distance.X, scroll.Distance.Y);
+                    Vector2 delta = new Vector2(scroll.Delta.X, scroll.Delta.Y);
+                    MouseScrollEventArgs scroll2 = new MouseScrollEventArgs(distance, delta);
+                    info.Window.SendEvent(this, scroll2);
+                    break;
+                }
+
+                // Keyboard & Text Events
+                case PlatformEventType.KeyDown:
+                {
+                    KeyDownEventArgs down = (KeyDownEventArgs)args;
+
+                    ModifierKeys modifierKeys = GetModifierKeys(down.Modifiers);
+                    KeyCode keyCode = GetKeyCode(down.Key);
+                    ScanCode scanCode = GetScanCode(down.Scancode);
+
+                    KeyboardButtonEventArgs up2 = new KeyboardButtonEventArgs(keyCode, scanCode, modifierKeys, false);
+                    info.Window.SendEvent(this, up2);
+                    break;
+                }
+                case PlatformEventType.KeyUp:
+                {
+                    KeyUpEventArgs up = (KeyUpEventArgs)args;
+
+                    ModifierKeys modifierKeys = GetModifierKeys(up.Modifiers);
+                    KeyCode keyCode = GetKeyCode(up.Key);
+                    ScanCode scanCode = GetScanCode(up.Scancode);
+
+                    KeyboardButtonEventArgs up2 = new KeyboardButtonEventArgs(keyCode, scanCode, modifierKeys, true);
+                    info.Window.SendEvent(this, up2);
+                    break;
+                }
+
+                case PlatformEventType.TextInput:
+                {
+                    OPENTK.TextInputEventArgs textInput = (OPENTK.TextInputEventArgs)args;
+                    DB.TextInputEventArgs textInput2 = new DB.TextInputEventArgs(textInput.Text);
+                    info.Window.SendEvent(this, textInput2);
+                    break;
+                }
+                case PlatformEventType.TextEditing:
+                {
+                    TextEditingEventArgs textEditing = (TextEditingEventArgs)args;
+                    TextEditEventArgs textEditing2 = new TextEditEventArgs(textEditing.Candidate, textEditing.Cursor, textEditing.Length);
+                    info.Window.SendEvent(this, textEditing2);
+                    break;
+                }
+
+                // Window/Surface related events.
+                case PlatformEventType.Close:
+                {
+                    info.Window.SendEvent(this, new WindowCloseEvent());
+                    break;
+                }
+                case PlatformEventType.WindowFramebufferResize:
+                {
+                    var resize = (WindowFramebufferResizeEventArgs)args;
+                    info.Window.SendEvent(this, new ResizeEventArgs());
+                    info.Window.SendEvent(this, new PaintEventArgs(info.Window.DeviceContext));
+                    break;
+                }
+                case PlatformEventType.WindowResize:
+                {
+                    var resize = (WindowResizeEventArgs)args;
+                    info.Window.SendEvent(this, new ResizeEventArgs());
+                    info.Window.SendEvent(this, new PaintEventArgs(info.Window.DeviceContext));
+                    break;
+                }
+
+                default:
+                    Debugger?.LogDebug($"Unknown event type {type} with \"{args}\".");
+                    break;
+            }
+        }
+
+        private static ModifierKeys GetModifierKeys(KeyModifier modifier)
+        {
+            ModifierKeys keys = 0;
+
+            keys |= modifier.HasFlag(KeyModifier.NumLock)    ? ModifierKeys.NumLock : 0;
+            keys |= modifier.HasFlag(KeyModifier.CapsLock)   ? ModifierKeys.CapsLock : 0;
+            keys |= modifier.HasFlag(KeyModifier.ScrollLock) ? ModifierKeys.ScrollLock : 0;
+
+            keys |= modifier.HasFlag(KeyModifier.LeftShift)   ? ModifierKeys.LeftShift : 0;
+            keys |= modifier.HasFlag(KeyModifier.LeftControl) ? ModifierKeys.LeftControl : 0;
+            keys |= modifier.HasFlag(KeyModifier.LeftAlt)     ? ModifierKeys.LeftAlt : 0;
+            keys |= modifier.HasFlag(KeyModifier.LeftGUI)     ? ModifierKeys.LeftMeta : 0;
+
+            keys |= modifier.HasFlag(KeyModifier.RightShift)   ? ModifierKeys.RightShift : 0;
+            keys |= modifier.HasFlag(KeyModifier.RightControl) ? ModifierKeys.RightControl : 0;
+            keys |= modifier.HasFlag(KeyModifier.RightAlt)     ? ModifierKeys.RightAlt : 0;
+            keys |= modifier.HasFlag(KeyModifier.RightGUI)     ? ModifierKeys.RightMeta : 0;
+
+            keys |= modifier.HasFlag(KeyModifier.Shift)   ? ModifierKeys.Shift : 0;
+            keys |= modifier.HasFlag(KeyModifier.Control) ? ModifierKeys.Control : 0;
+            keys |= modifier.HasFlag(KeyModifier.Alt)     ? ModifierKeys.Alt : 0;
+            keys |= modifier.HasFlag(KeyModifier.GUI)     ? ModifierKeys.Meta : 0;
+
+            // C# makes this cast as annoying as possible.
+            keys |= (ModifierKeys)((((int)keys >> (int)ModifierKeys.RightBitPos) & 0xF) |
+                                   (((int)keys >> (int)ModifierKeys.LeftBitPos) & 0xF));
+
+            return keys;
+        }
+
+        private record WindowExtraInfo(PhysicalWindow Window)
+        {
+            public Vector2 MousePosition { get; set; } = Vector2.Zero;
+        }
+
+        // TODO: Keycode and scancode tables.
+
+        private static KeyCode GetKeyCode(Key key) => key switch
+        {
+            _ => (KeyCode)0,
+        };
+
+        private static ScanCode GetScanCode(Scancode scanCode) => scanCode switch
+        {
+            _ => (ScanCode)0,
+        };
+    }
+
+    internal class ApplicationQuitEventArgs() : EventArgs
+    {
+    }
+}

Dashboard.OpenTK/PAL2/Pal2DashboardBackend.cs

@@ -1,50 +0,0 @@
-using Dashboard.Windowing;
-using OpenTK.Graphics;
-using OpenTK.Platform;
-using TK = OpenTK.Platform.Toolkit;
-
-namespace Dashboard.OpenTK.PAL2
-{
-    public class Pal2DashboardBackend : IDashboardBackend
-    {
-        public GraphicsApiHints GraphicsApiHints { get; set; } = new OpenGLGraphicsApiHints();
-        public bool OpenGLBindingsInitialized { get; set; } = false;
-
-        public IPhysicalWindow CreatePhysicalWindow()
-        {
-            PhysicalWindow window = new PhysicalWindow(GraphicsApiHints);
-
-            if (!OpenGLBindingsInitialized)
-            {
-                OpenGLBindingsInitialized = true;
-                GLLoader.LoadBindings(
-                    new Pal2BindingsContext(TK.OpenGL, 
-                    ((OpenGLDeviceContext)window.DeviceContext).ContextHandle));
-            }
-
-            return window;
-        }
-
-        public virtual IWindow CreateWindow()
-        {
-            return CreatePhysicalWindow();
-        }
-
-        public void Dispose()
-        {
-        }
-
-        public void Initialize()
-        {
-        }
-
-        public void Leave()
-        {
-        }
-
-        public void RunEvents(bool wait)
-        {
-            TK.Window.ProcessEvents(wait);
-        }
-    }
-}

Dashboard.OpenTK/PAL2/Pal2GLContext.cs

@@ -1,6 +1,7 @@
 using System.Collections.Concurrent;
 using System.Drawing;
 using Dashboard.OpenGL;
+using Dashboard.Pal;
 using Dashboard.Windowing;
 using OpenTK.Mathematics;
 using OpenTK.Platform;
@@ -8,31 +9,32 @@ using TK = OpenTK.Platform.Toolkit;
 
 namespace Dashboard.OpenTK.PAL2
 {
-    public class OpenGLDeviceContext : IGLContext, IGLDisposable
+    public class Pal2GLContext : IGLContext, IDisposable
     {
         public OpenGLContextHandle ContextHandle { get; }
         public WindowHandle WindowHandle { get; }
 
         public ISwapGroup SwapGroup { get; }
+
         public int ContextGroup { get; }
 
-        public Size FramebufferSize
+        public System.Numerics.Vector2 FramebufferSize
         {
             get
             {
                 TK.Window.GetFramebufferSize(WindowHandle, out Vector2i size);
-                return new Size(size.X, size.Y);
+                return new System.Numerics.Vector2(size.X, size.Y);
             }
         }
 
         public event Action? Disposed;
 
-        public OpenGLDeviceContext(WindowHandle window, OpenGLContextHandle context, ISwapGroup? group = null)
+        public Pal2GLContext(WindowHandle window, OpenGLContextHandle context)
         {
             WindowHandle = window;
             ContextHandle = context;
-            SwapGroup = group ?? new DummySwapGroup(context);
+            SwapGroup = new DummySwapGroup(context);
-            ContextGroup = GetContextGroup(context);
+            ContextGroup = GetContextGroup(ContextHandle);
         }
 
         public void MakeCurrent()
@@ -40,18 +42,18 @@ namespace Dashboard.OpenTK.PAL2
             TK.OpenGL.SetCurrentContext(ContextHandle);
         }
 
-        private bool _isDisposed = false;
+        public IntPtr GetProcAddress(string procName)
+        {
+            return TK.OpenGL.GetProcedureAddress(ContextHandle, procName);
+        }
 
         public void Dispose() => Dispose(true);
 
-        public void Dispose(bool safeExit)
+        protected void Dispose(bool isDisposing)
         {
-            if (_isDisposed) return;
-            _isDisposed = true;
-
             if (SwapGroup is IGLDisposable glDisposable)
             {
-                glDisposable.Dispose(safeExit);
+                glDisposable.Dispose(isDisposing);
             }
             else if (SwapGroup is IDisposable disposable)
             {
@@ -63,6 +65,7 @@ namespace Dashboard.OpenTK.PAL2
 
         private static int _contextGroupId = 0;
         private static ConcurrentDictionary<OpenGLContextHandle, int> _contextGroupRootContexts = new ConcurrentDictionary<OpenGLContextHandle, int>();
+        private Size _framebufferSize;
 
         private static int GetContextGroup(OpenGLContextHandle handle)
         {

Dashboard.OpenTK/PAL2/PhysicalWindow.cs

@@ -1,7 +1,10 @@
 using System.Collections.Concurrent;
 using System.Drawing;
-using Dashboard.Drawing;
+using System.Net;
+using System.Runtime.CompilerServices;
 using Dashboard.Events;
+using Dashboard.OpenGL;
+using Dashboard.Pal;
 using Dashboard.Windowing;
 using OpenTK.Mathematics;
 using OpenTK.Platform;
@@ -10,12 +13,15 @@ using TK = OpenTK.Platform.Toolkit;
 
 namespace Dashboard.OpenTK.PAL2
 {
-    public class PhysicalWindow : IPhysicalWindow, IDrawQueuePaintable, IEventListener
+    public class PhysicalWindow : IPhysicalWindow, IEventListener, IDpiAwareWindow
     {
-        public DrawQueue DrawQueue { get; } = new DrawQueue();
+        private readonly List<IEventListener> _listeners = new List<IEventListener>();
+
+        public Application Application { get; }
         public WindowHandle WindowHandle { get; }
-        public IDeviceContext DeviceContext { get; }
+        public DeviceContext DeviceContext { get; }
         public bool DoubleBuffered => true; // Always true for OpenTK windows.
+        public IForm? Form { get; set; } = null;
 
         public IWindowManager? WindowManager { get; set; }
 
@@ -45,119 +51,99 @@ namespace Dashboard.OpenTK.PAL2
             set => TK.Window.SetClientSize(WindowHandle, new Vector2i((int)value.Width, (int)value.Height));
         }
 
-        public event EventHandler? Painting;
+        public event EventHandler? EventRaised;
-        public event EventHandler<AnimationTickEventArgs>? AnimationTimerEvent;
-        public event EventHandler<MouseMoveEventArgs>? MouseMoved;
-        public event EventHandler<MouseButtonEventArgs>? MouseButtonDown;
-        public event EventHandler<MouseButtonEventArgs>? MouseButtonUp;
-        public event EventHandler<MouseScrollEventArgs>? MouseScroll;
 
-        public PhysicalWindow(WindowHandle window, IDeviceContext dc)
+        public PhysicalWindow(Application app, WindowHandle window)
         {
+            Application = app;
             WindowHandle = window;
-            DeviceContext = dc;
+            DeviceContext = CreateDeviceContext(app, this, new OpenGLGraphicsApiHints());
-            AddWindow(this);
         }
 
-        public PhysicalWindow(WindowHandle window, OpenGLContextHandle context, ISwapGroup? swapGroup = null)
+        public PhysicalWindow(Application app, WindowHandle window, OpenGLContextHandle context)
         {
+            Application = app;
             WindowHandle = window;
-            DeviceContext = new OpenGLDeviceContext(window, context, swapGroup);
+            DeviceContext = new GLDeviceContext(app, this, new Pal2GLContext(window, context));
-            AddWindow(this);
         }
 
-        public PhysicalWindow(GraphicsApiHints hints)
+        public PhysicalWindow(Application app, GraphicsApiHints hints)
         {
+            Application = app;
             WindowHandle = TK.Window.Create(hints);
-            DeviceContext = CreateDeviceContext(WindowHandle, hints);
+            DeviceContext = CreateDeviceContext(app, this, hints);
-            AddWindow(this);
         }
 
-        private static IDeviceContext CreateDeviceContext(WindowHandle window, GraphicsApiHints hints)
+        private static DeviceContext CreateDeviceContext(Application app, PhysicalWindow window, GraphicsApiHints hints)
         {
+            WindowHandle handle = window.WindowHandle;
             switch (hints.Api)
             {
             case GraphicsApi.OpenGL:
             case GraphicsApi.OpenGLES:
-                OpenGLContextHandle context = TK.OpenGL.CreateFromWindow(window);
+                return new GLDeviceContext(app, window, new Pal2GLContext(handle, TK.OpenGL.CreateFromWindow(handle)));
-                return new OpenGLDeviceContext(window, context);
             default:
                 throw new Exception($"Unknown graphics API {hints.Api}.");
             }
         }
 
-        private bool _isDisposed = false;
+        public bool IsDisposed { get; private set; } = false;
         public void Dispose()
         {
-            if (_isDisposed) return;
+            if (IsDisposed) return;
-            _isDisposed = true;
+            IsDisposed = true;
 
-            RemoveWindow(this);
 
             (DeviceContext as IDisposable)?.Dispose();
+
+            ((Pal2Application)Application).RemoveWindow(this);
             TK.Window.Destroy(WindowHandle);
         }
 
-        protected virtual void OnPaint()
+        public virtual void SendEvent(object? sender, EventArgs args)
         {
-            WindowManager?.Paint();
+            args = TransformEvent(sender, args);
-            Painting?.Invoke(this, EventArgs.Empty);
-        }
 
-        public void Paint()
+            Form?.SendEvent(this, args);
-        {
+            EventRaised?.Invoke(this, args);
-            DrawQueue.Clear();
-            OnPaint();
-        }
 
-        protected virtual void OnAnimationTimerEvent(AnimationTickEventArgs ea) =>
+            lock (_listeners)
-            AnimationTimerEvent?.Invoke(this, ea);
-
-        protected virtual void OnMouseMoved(MouseMoveEventArgs ea) => MouseMoved?.Invoke(this, ea);
-
-        protected virtual void OnMouseButtonDown(MouseButtonEventArgs ea) => MouseButtonDown?.Invoke(this, ea);
-
-        protected virtual void OnMouseButtonUp(MouseButtonEventArgs ea) => MouseButtonUp?.Invoke(this, ea);
-
-        protected virtual void OnMouseScroll(MouseScrollEventArgs ea) => MouseScroll?.Invoke(this, ea);
-
-        public void SendEvent(EventArgs args)
-        {
-        }
-
-        private static readonly ConcurrentDictionary<WindowHandle, PhysicalWindow> _windows =
-            new ConcurrentDictionary<WindowHandle, PhysicalWindow>();
-
-        static PhysicalWindow()
-        {
-            EventQueue.EventRaised += EventQueueOnEventRaised;
-        }
-
-        private static void AddWindow(PhysicalWindow window)
-        {
-            _windows.TryAdd(window.WindowHandle, window);
-        }
-
-        private static void RemoveWindow(PhysicalWindow window)
-        {
-            _windows.TryRemove(window.WindowHandle, out _);
-        }
-
-        private static void EventQueueOnEventRaised(PalHandle? handle, PlatformEventType type, EventArgs args)
-        {
-            if (handle is not WindowHandle windowHandle)
-                return;
-
-            if (!_windows.TryGetValue(windowHandle, out PhysicalWindow? window))
-                return;
-
-            switch (type)
             {
-                case PlatformEventType.MouseMove:
+                foreach (IEventListener listener in _listeners)
-                case PlatformEventType.Scroll:
+                    listener.SendEvent(this, args);
-                case PlatformEventType.MouseUp:
+            }
-                case PlatformEventType.MouseDown:
+        }
-                    break;
+
+        private EventArgs TransformEvent(object? sender, EventArgs args)
+        {
+            // TODO: future
+            return args;
+        }
+
+        public void SubcribeEvent(IEventListener listener)
+        {
+            lock (_listeners)
+            {
+                _listeners.Add(listener);
+            }
+        }
+
+        public void UnsubscribeEvent(IEventListener listener)
+        {
+            lock (_listeners)
+            {
+                _listeners.Remove(listener);
+            }
+        }
+
+        public float Dpi => Scale * 96f;
+
+        public float Scale
+        {
+            get
+            {
+                TK.Window.GetScaleFactor(WindowHandle, out float x, out float y);
+                return Math.Max(x, y);
             }
         }
     }

Dashboard.StbImage/Dashboard.StbImage.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <LangVersion>latest</LangVersion>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Dashboard.Common\Dashboard.Common.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="ReFuel.StbImage" Version="2.1.0" />
+    </ItemGroup>
+
+</Project>

Dashboard.StbImage/StbImageLoader.cs

@@ -0,0 +1,47 @@
+using Dashboard.Drawing;
+using Dashboard.Pal;
+using ReFuel.Stb;
+
+namespace Dashboard.StbImage
+{
+    public class StbImageLoader : IImageLoader
+    {
+        public string DriverName { get; } = "Dashboard Stb Image Loader";
+        public string DriverVendor { get; } = "Dashboard";
+        public Version DriverVersion { get; } = new Version(1, 0);
+
+        public void Dispose()
+        {
+        }
+
+        IContextBase IContextExtensionBase.Context => Context;
+
+        public void Require(Application context)
+        {
+            Context = context;
+        }
+
+        public ImageData LoadImageData(Stream stream)
+        {
+            using ReFuel.Stb.StbImage image = ReFuel.Stb.StbImage.Load(stream, StbiImageFormat.Rgba);
+            ReadOnlySpan<byte> data = image.AsSpan<byte>();
+            return new ImageData(TextureType.Texture2D, image.Format switch
+                {
+                    StbiImageFormat.GreyAlpha => PixelFormat.Rg8I,
+                    StbiImageFormat.Rgb => PixelFormat.Rgb8I,
+                    StbiImageFormat.Rgba => PixelFormat.Rgba8I,
+                    _ => PixelFormat.R8I,
+                },
+                image.Width,
+                image.Height,
+                data.ToArray());
+        }
+
+        public Application Context { get; private set; } = null!;
+
+        void IContextExtensionBase.Require(IContextBase context)
+        {
+            Require((Application)context);
+        }
+    }
+}

Dashboard.sln

@@ -5,8 +5,6 @@ VisualStudioVersion = 17.0.31903.59
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Dashboard", "Dashboard\Dashboard.csproj", "{49A62F46-AC1C-4240-8615-020D4FBBF964}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Dashboard.Drawing", "Dashboard.Drawing\Dashboard.Drawing.csproj", "{1BDFEF50-C907-42C8-B63B-E4F6F585CFB5}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{9D6CCC74-4DF3-47CB-B9B2-6BB75DF2BC40}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Dashboard.TestApplication", "tests\Dashboard.TestApplication\Dashboard.TestApplication.csproj", "{7C90B90B-DF31-439B-9080-CD805383B014}"
@@ -17,16 +15,18 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Dashboard.TestApplication",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.Common", "Dashboard.Common\Dashboard.Common.csproj", "{C77CDD2B-2482-45F9-B330-47A52F5F13C0}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.Drawing.OpenGL", "Dashboard.Drawing.OpenGL\Dashboard.Drawing.OpenGL.csproj", "{454198BA-CB95-41C5-A934-B1C8FDA35A6B}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.ImmediateUI", "Dashboard.ImmediateUI\Dashboard.ImmediateUI.csproj", "{3F33197F-0B7B-4CD8-98BD-05D6D5EC76B2}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Frameworks", "Frameworks", "{9B62A92D-ABF5-4704-B831-FD075515A82F}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.OpenTK", "Dashboard.OpenTK\Dashboard.OpenTK.csproj", "{7B064228-2629-486E-95C6-BDDD4B4602C4}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.OpenGL", "Dashboard.OpenGL\Dashboard.OpenGL.csproj", "{33EB657C-B53A-41B4-BC3C-F38C09ABA577}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.StbImage", "Dashboard.StbImage\Dashboard.StbImage.csproj", "{85BCEB9E-DEC2-4A53-B2DA-6BFC6F3EE4E7}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.BlurgText.OpenGL", "Dashboard.BlurgText.OpenGL\Dashboard.BlurgText.OpenGL.csproj", "{14616F42-663B-4673-8561-5637FAD1B22F}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Dashboard.BlurgText", "Dashboard.BlurgText\Dashboard.BlurgText.csproj", "{8C68EFB6-B477-48EC-9AAA-31E89883482B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -37,10 +37,6 @@ Global
 		{49A62F46-AC1C-4240-8615-020D4FBBF964}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{49A62F46-AC1C-4240-8615-020D4FBBF964}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{49A62F46-AC1C-4240-8615-020D4FBBF964}.Release|Any CPU.Build.0 = Release|Any CPU
-		{1BDFEF50-C907-42C8-B63B-E4F6F585CFB5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{1BDFEF50-C907-42C8-B63B-E4F6F585CFB5}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{1BDFEF50-C907-42C8-B63B-E4F6F585CFB5}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{1BDFEF50-C907-42C8-B63B-E4F6F585CFB5}.Release|Any CPU.Build.0 = Release|Any CPU
 		{7C90B90B-DF31-439B-9080-CD805383B014}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{7C90B90B-DF31-439B-9080-CD805383B014}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{7C90B90B-DF31-439B-9080-CD805383B014}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -49,14 +45,6 @@ Global
 		{C77CDD2B-2482-45F9-B330-47A52F5F13C0}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C77CDD2B-2482-45F9-B330-47A52F5F13C0}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C77CDD2B-2482-45F9-B330-47A52F5F13C0}.Release|Any CPU.Build.0 = Release|Any CPU
-		{454198BA-CB95-41C5-A934-B1C8FDA35A6B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{454198BA-CB95-41C5-A934-B1C8FDA35A6B}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{454198BA-CB95-41C5-A934-B1C8FDA35A6B}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{454198BA-CB95-41C5-A934-B1C8FDA35A6B}.Release|Any CPU.Build.0 = Release|Any CPU
-		{3F33197F-0B7B-4CD8-98BD-05D6D5EC76B2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{3F33197F-0B7B-4CD8-98BD-05D6D5EC76B2}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{3F33197F-0B7B-4CD8-98BD-05D6D5EC76B2}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{3F33197F-0B7B-4CD8-98BD-05D6D5EC76B2}.Release|Any CPU.Build.0 = Release|Any CPU
 		{7B064228-2629-486E-95C6-BDDD4B4602C4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{7B064228-2629-486E-95C6-BDDD4B4602C4}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{7B064228-2629-486E-95C6-BDDD4B4602C4}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -65,6 +53,18 @@ Global
 		{33EB657C-B53A-41B4-BC3C-F38C09ABA577}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{33EB657C-B53A-41B4-BC3C-F38C09ABA577}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{33EB657C-B53A-41B4-BC3C-F38C09ABA577}.Release|Any CPU.Build.0 = Release|Any CPU
+		{85BCEB9E-DEC2-4A53-B2DA-6BFC6F3EE4E7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{85BCEB9E-DEC2-4A53-B2DA-6BFC6F3EE4E7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{85BCEB9E-DEC2-4A53-B2DA-6BFC6F3EE4E7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{85BCEB9E-DEC2-4A53-B2DA-6BFC6F3EE4E7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{14616F42-663B-4673-8561-5637FAD1B22F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{14616F42-663B-4673-8561-5637FAD1B22F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{14616F42-663B-4673-8561-5637FAD1B22F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{14616F42-663B-4673-8561-5637FAD1B22F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8C68EFB6-B477-48EC-9AAA-31E89883482B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8C68EFB6-B477-48EC-9AAA-31E89883482B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8C68EFB6-B477-48EC-9AAA-31E89883482B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8C68EFB6-B477-48EC-9AAA-31E89883482B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -72,5 +72,8 @@ Global
 	GlobalSection(NestedProjects) = preSolution
 		{7C90B90B-DF31-439B-9080-CD805383B014} = {9D6CCC74-4DF3-47CB-B9B2-6BB75DF2BC40}
 		{7B064228-2629-486E-95C6-BDDD4B4602C4} = {9B62A92D-ABF5-4704-B831-FD075515A82F}
+		{85BCEB9E-DEC2-4A53-B2DA-6BFC6F3EE4E7} = {9B62A92D-ABF5-4704-B831-FD075515A82F}
+		{14616F42-663B-4673-8561-5637FAD1B22F} = {9B62A92D-ABF5-4704-B831-FD075515A82F}
+		{8C68EFB6-B477-48EC-9AAA-31E89883482B} = {9B62A92D-ABF5-4704-B831-FD075515A82F}
 	EndGlobalSection
 EndGlobal

Dashboard/Application.cs

@@ -1,131 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Threading;
-using Dashboard.Windowing;
-
-namespace Dashboard
-{
-    public class Application : IDisposable
-    {
-        public IDashboardBackend Backend { get; }
-        public IWindowFactory WindowFactory { get; set; }
-
-        public string Name { get; } = "Dashboard Application";
-
-        protected bool IsInitialized { get; private set; } = false;
-        protected bool IsDisposed { get; private set; } = false;
-
-        private readonly List<IPhysicalWindow> _physicalWindows = new List<IPhysicalWindow>();
-
-        public event EventHandler? PreInitializing;
-        public event EventHandler? Initializing;
-        public event EventHandler? PostInitializing;
-        public event EventHandler? Leaving;
-
-        public Application(IDashboardBackend backend)
-        {
-            Backend = backend;
-            WindowFactory = backend;
-        }
-
-        protected virtual void PreInitialize()
-        {
-            PreInitializing?.Invoke(this, EventArgs.Empty);
-        }
-
-        public virtual void Initialize()
-        {
-            Backend.Initialize();
-            Initializing?.Invoke(this, EventArgs.Empty);
-        }
-
-        protected virtual void PostInitialize()
-        {
-            PostInitializing?.Invoke(this, EventArgs.Empty);
-        }
-
-        private void InitializeInternal()
-        {
-            if (IsInitialized)
-                return;
-
-            IsInitialized = true;
-
-            PreInitialize();
-            Initialize();
-            PostInitialize();
-        }
-
-        public virtual void RunEvents(bool wait)
-        {
-            if (!IsInitialized)
-                throw new InvalidOperationException("The application is not initialized. Cannot run events at this time.");
-
-            Backend.RunEvents(wait);
-        }
-
-        public virtual void Leave()
-        {
-            Backend.Leave();
-            Leaving?.Invoke(this, EventArgs.Empty);
-        }
-
-        public void Run() => Run(true, CancellationToken.None);
-        public void Run(bool wait) => Run(wait, CancellationToken.None);
-        
-        public void Run(bool waitForEvents, CancellationToken token)
-        {
-            InitializeInternal();
-
-            while (!token.IsCancellationRequested)
-            {
-                RunEvents(waitForEvents);
-
-                foreach (IPhysicalWindow window in _physicalWindows)
-                {
-                    window.Paint();
-                }
-            }
-
-            Leave();
-        }
-
-        /// <inheritdoc cref="IWindowFactory.CreateWindow"/>
-        public IWindow CreateWindow()
-        {
-            IWindow window = WindowFactory.CreateWindow();
-
-            if (window is IPhysicalWindow physical)
-                _physicalWindows.Add(physical);
-
-            return window;
-        }
-
-        /// <inheritdoc cref="IWindowFactory.CreatePhysicalWindow"/>
-        public IPhysicalWindow CreatePhysicalWindow()
-        {
-            IPhysicalWindow window = WindowFactory.CreatePhysicalWindow();
-            _physicalWindows.Add(window);
-            return window;
-        } 
-
-        protected virtual void Dispose(bool disposing)
-        {
-        }
-
-        protected void InvokeDispose(bool disposing)
-        {
-            if (IsDisposed)
-                return;
-
-            IsDisposed = true;
-
-            Dispose(disposing);
-
-            if (disposing)
-                GC.SuppressFinalize(this);
-        }
-
-        public void Dispose() => InvokeDispose(true);
-    }
-}

Dashboard/Controls/Button.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Drawing;
+using System.Numerics;
+using Dashboard.Drawing;
+using Dashboard.Layout;
+using Dashboard.Pal;
+
+namespace Dashboard.Controls
+{
+    public class Button : Control
+    {
+        private Vector2 _intrinsicSize = Vector2.Zero;
+
+        public bool AutoSize { get; set; } = true;
+        public string Text { get; set; } = "Click!";
+
+        public Font Font { get; set; } = Font.Create(new FontInfo("Rec Mono Linear"));
+        public float TextSize { get; set; } = 12f;
+        public Brush TextBrush { get; set; } = new SolidColorBrush(Color.Black);
+        public Brush ButtonBrush { get; set; } = new SolidColorBrush(Color.DarkSlateGray);
+
+        public Vector2 Padding { get; set; } = new Vector2(4, 4);
+
+        public event EventHandler? Clicked;
+
+        public override Vector2 CalculateIntrinsicSize()
+        {
+            return _intrinsicSize + 2 * Padding;
+        }
+
+        protected void CalculateSize(DeviceContext dc)
+        {
+            Box2d box = dc.ExtensionRequire<ITextRenderer>().MeasureText(Font.Base, TextSize, Text);
+            _intrinsicSize = box.Size;
+            // Layout.Size = box.Size;
+            // ClientArea = new Box2d(ClientArea.Min, ClientArea.Min + Layout.Size);
+        }
+
+        public override void OnPaint(DeviceContext dc)
+        {
+            base.OnPaint(dc);
+
+            if (AutoSize)
+                CalculateSize(dc);
+
+            bool hidden = Layout.OverflowMode == OverflowMode.Hidden;
+            var dcb = dc.ExtensionRequire<IDeviceContextBase>();
+            if (hidden)
+                dcb.PushScissor(ClientArea);
+
+            dcb.PushTransforms(Matrix4x4.CreateTranslation(ClientArea.Left, ClientArea.Top, 0));
+
+            var imm = dc.ExtensionRequire<IImmediateMode>();
+            Color color = (ButtonBrush as SolidColorBrush)?.Color ?? Color.Black;
+            Vector4 colorVector = new Vector4(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
+            imm.Rectangle(ClientArea, 0, colorVector);
+
+            var text = dc.ExtensionRequire<ITextRenderer>();
+            color = (TextBrush as SolidColorBrush)?.Color ?? Color.Black;
+            colorVector = new Vector4(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
+            text.DrawText(Vector2.Zero, colorVector, TextSize, Font.Base, Text);
+
+            if (hidden)
+                dcb.PopScissor();
+
+            dcb.PopTransforms();
+        }
+    }
+}

Dashboard/Controls/ClassSet.cs

@@ -1,77 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-
-namespace Dashboard.Controls
-{
-    public enum ClassChangeType
-    {
-        Added,
-        Removed,
-    }
-
-    public record struct ClassChanged(object? Owner, string ClassName, ClassChangeType Type);
-
-    public class ClassSet : ICollection<string>
-    {
-        public int Count => _classes.Count;
-        public bool IsReadOnly => false;
-        public object? Owner { get; }
-        public event EventHandler<ClassChanged>? ClassChanged;
-
-        private readonly HashSet<string> _classes = new HashSet<string>();
-
-        public ClassSet(object? owner)
-        {
-            Owner = owner;
-        }
-
-        public IEnumerator<string> GetEnumerator() => _classes.GetEnumerator();
-
-        IEnumerator IEnumerable.GetEnumerator()
-        {
-            return GetEnumerator();
-        }
-
-        public void Add(string item)
-        {
-            if (_classes.Add(item))
-            {
-                OnClassAdded(item);
-            }
-        }
-
-        public void Clear()
-        {
-            foreach (string @class in _classes)
-                OnClassRemoved(@class);
-
-            _classes.Clear();
-        }
-
-        public bool Contains(string item) => _classes.Contains(item);
-
-        public void CopyTo(string[] array, int arrayIndex) => _classes.CopyTo(array, arrayIndex);
-
-        public bool Remove(string item)
-        {
-            if (_classes.Remove(item))
-            {
-                OnClassRemoved(item);
-                return true;
-            }
-
-            return false;
-        }
-
-        private void OnClassAdded(string @class)
-        {
-            ClassChanged?.Invoke(this, new ClassChanged(Owner, @class, ClassChangeType.Added));
-        }
-
-        private void OnClassRemoved(string @class)
-        {
-            ClassChanged?.Invoke(this, new ClassChanged(Owner, @class, ClassChangeType.Removed));
-        }
-    }
-}

Dashboard/Controls/Container.cs

@@ -0,0 +1,145 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using Dashboard.Drawing;
+using Dashboard.Events;
+using Dashboard.Layout;
+using Dashboard.Pal;
+
+namespace Dashboard.Controls
+{
+    public class Container : Control, IList<Control>, ILayoutContainer
+    {
+        private readonly List<Control> _controls = new List<Control>();
+
+        public int Count => _controls.Count;
+
+        public bool IsReadOnly => false;
+
+        public ContainerLayoutInfo ContainerLayout { get; } = new ContainerLayoutInfo();
+
+        public event EventHandler<ContainerChildAddedEventArgs>? ChildAdded;
+        public event EventHandler<ContainerChildRemovedEventArgs>? ChildRemoved;
+
+
+        public Control this[int index]
+        {
+            get => _controls[index];
+            set => _controls[index] = value;
+        }
+
+        protected override void ValidateLayout()
+        {
+            if (!IsLayoutEnabled || IsLayoutValid)
+                return;
+
+            // LayoutSolution solution = LayoutSolution.CalculateLayout(this, ClientArea.Size);
+
+            base.ValidateLayout();
+        }
+
+        public override void OnPaint(DeviceContext dc)
+        {
+            base.OnPaint(dc);
+
+            var dcb = dc.ExtensionRequire<IDeviceContextBase>();
+            dcb.PushClip(ClientArea);
+            ValidateLayout();
+
+            foreach (Control child in _controls)
+            {
+                if (child.Layout.DisplayMode == DisplayMode.None)
+                    continue;
+
+                child.SendEvent(this, new PaintEventArgs(dc));
+            }
+
+            dcb.PopClip();
+        }
+
+        IEnumerator<ILayoutItem> IEnumerable<ILayoutItem>.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        public IEnumerator<Control> GetEnumerator()
+        {
+            return _controls.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return ((IEnumerable)_controls).GetEnumerator();
+        }
+
+        public void Add(Control item)
+        {
+            SetParent(this, item);
+
+            _controls.Add(item);
+            ChildAdded?.Invoke(this, new ContainerChildAddedEventArgs(this, item));
+        }
+
+        public void Clear()
+        {
+            foreach (Control control in this)
+            {
+                ChildRemoved?.Invoke(this, new ContainerChildRemovedEventArgs(this, control));
+            }
+            _controls.Clear();
+        }
+
+        public bool Contains(Control item)
+        {
+            return _controls.Contains(item);
+        }
+
+        public void CopyTo(Control[] array, int arrayIndex)
+        {
+            _controls.CopyTo(array, arrayIndex);
+        }
+
+        public bool Remove(Control item)
+        {
+            if (!_controls.Remove(item))
+                return false;
+
+            ChildRemoved?.Invoke(this, new ContainerChildRemovedEventArgs(this, item));
+            return true;
+        }
+
+        public int IndexOf(Control item)
+        {
+            return _controls.IndexOf(item);
+        }
+
+        public void Insert(int index, Control item)
+        {
+            SetParent(this, item);
+
+            _controls.Insert(index, item);
+            ChildAdded?.Invoke(this, new ContainerChildAddedEventArgs(this, item));
+        }
+
+        public void RemoveAt(int index)
+        {
+            Control child = _controls[index];
+            _controls.RemoveAt(index);
+            ChildRemoved?.Invoke(this, new ContainerChildRemovedEventArgs(this, child));
+        }
+
+
+    }
+
+    public class ContainerChildAddedEventArgs(Container parent, Control child) : EventArgs
+    {
+        public Container Parent { get; } = parent;
+        public Control Child { get; } = child;
+    }
+
+    public class ContainerChildRemovedEventArgs(Container parent, Control child) : EventArgs
+    {
+        public Container Parent { get; } = parent;
+        public Control Child { get; } = child;
+    }
+}

Dashboard/Controls/Control.cs

@@ -1,38 +1,72 @@
 using System;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Drawing;
+using System.Numerics;
 using Dashboard.Drawing;
+using Dashboard.Events;
+using Dashboard.Layout;
+using Dashboard.Pal;
 using Dashboard.Windowing;
 
 namespace Dashboard.Controls
 {
-    public class Control : IEventListener, IDrawQueuePaintable, IDisposable
+    public class Control : IEventListener, ILayoutItem, IDisposable
     {
+        private Form? _owner = null;
+
         public string? Id { get; set; }
-        public ClassSet Classes { get; }
+
-        public Form? Owner { get; protected set; } = null;
+        public Form Owner
+        {
+            get => _owner ?? throw NoOwnerException;
+            protected set
+            {
+                _owner = value;
+                OnOwnerChanged(value);
+            }
+        }
+
         public Control? Parent { get; private set; } = null;
         public bool Disposed { get; private set; }
-        public virtual DrawQueue DrawQueue => Owner?.DrawQueue ?? throw NoOwnerException;
         public virtual Box2d ClientArea { get; set; }
+        public bool IsFocused => _owner?.FocusedControl == this;
 
-        public event EventHandler? Painting;
+        public Brush Background { get; set; } = new SolidColorBrush(Color.Transparent);
+        public Brush BorderBrush { get; set; } = new SolidColorBrush(Color.Black);
+
+        public LayoutInfo Layout { get; } = new LayoutInfo();
+        public bool IsLayoutEnabled { get; private set; } = true;
+        protected bool IsLayoutValid { get; set; } = false;
+
+        public event EventHandler<DeviceContext>? Painting;
+        public event EventHandler<TickEventArgs>? AnimationTick;
         public event EventHandler? OwnerChanged;
         public event EventHandler? ParentChanged;
+        public event EventHandler? FocusGained;
+        public event EventHandler? FocusLost;
         public event EventHandler? Disposing;
         public event EventHandler? Resized;
 
-        public Control()
+        public virtual Vector2 CalculateIntrinsicSize()
         {
-            Classes = new ClassSet(this);
+            return Vector2.Zero;
+            // return Vector2.Max(Vector2.Zero, Vector2.Max(Layout.Size, Layout.MinimumSize));
         }
 
-        public virtual void OnPaint()
+        public Vector2 CalculateSize(Vector2 limits)
         {
-            Painting?.Invoke(this, EventArgs.Empty);
+            return CalculateIntrinsicSize();
         }
 
-        public void Paint()
+        public virtual void OnPaint(DeviceContext dc)
         {
-            OnPaint();
+            Painting?.Invoke(this, dc);
+        }
+
+        public virtual void OnAnimationTick(TickEventArgs tick)
+        {
+            AnimationTick?.Invoke(this, tick);
         }
 
         protected void InvokeDispose(bool disposing)
@@ -49,20 +83,99 @@ namespace Dashboard.Controls
 
         protected virtual void Dispose(bool disposing)
         {
+            if (disposing) Disposing?.Invoke(this, EventArgs.Empty);
         }
 
         public void Dispose() => InvokeDispose(true);
 
-        public void SendEvent(EventArgs args)
+        public event EventHandler? EventRaised;
+
+        protected virtual void OnEventRaised(object? sender, EventArgs args)
         {
-            throw new NotImplementedException();
+            switch (args)
+            {
+                case PaintEventArgs paint:
+                    OnPaint(paint.DeviceContext);
+                    break;
+            }
+
+            EventRaised?.Invoke(this, TransformEvent(sender, args));
         }
 
-        internal static void SetParent(Control parent, Control child)
+        protected virtual EventArgs TransformEvent(object? sender, EventArgs args)
+        {
+            return args;
+        }
+
+        public void SendEvent(object? sender, EventArgs args)
+        {
+            OnEventRaised(sender, args);
+        }
+
+        internal static void SetParent(Container parent, Control child)
         {
             child.Parent = parent;
+            child.ParentChanged?.Invoke(child, EventArgs.Empty);
+        }
+
+        public virtual void Focus()
+        {
+            (Owner ?? throw NoOwnerException).Focus(this);
+        }
+
+        protected virtual void OnFocusGained(object sender)
+        {
+            FocusGained?.Invoke(sender, EventArgs.Empty);
+        }
+
+        protected virtual void OnFocusLost(object sender)
+        {
+            FocusLost?.Invoke(sender, EventArgs.Empty);
+        }
+
+        internal static void InvokeFocusGained(Form form, Control control)
+        {
+            control.OnFocusGained(form);
+        }
+
+        internal static void InvokeFocusLost(Form form, Control control)
+        {
+            control.OnFocusLost(form);
+        }
+
+        protected virtual void OnResize()
+        {
+            Resized?.Invoke(this, EventArgs.Empty);
+            InvalidateLayout();
+        }
+
+        private void OnOwnerChanged(Form value)
+        {
+            OwnerChanged?.Invoke(this, EventArgs.Empty);
+        }
+
+        public void InvalidateLayout()
+        {
+            IsLayoutValid = false;
+        }
+
+        protected virtual void ValidateLayout()
+        {
+            IsLayoutValid = true;
+        }
+
+        public void ResumeLayout()
+        {
+            IsLayoutEnabled = true;
+        }
+
+        public void SuspendLayout()
+        {
+            IsLayoutEnabled = false;
+            IsLayoutValid = false;
         }
 
         protected static Exception NoOwnerException => new Exception("No form owns this control");
+        public event PropertyChangedEventHandler? PropertyChanged;
     }
 }

Dashboard/Controls/Form.cs

@@ -1,12 +1,30 @@
+using System;
+using System.Drawing;
 using Dashboard.Drawing;
+using Dashboard.Events;
+using Dashboard.Pal;
 using Dashboard.Windowing;
 
 namespace Dashboard.Controls
 {
-    public class Form : Control
+    public class Form : Container, IForm
     {
+        private string? _title = "Untitled Form";
         public IWindow Window { get; }
-        public override DrawQueue DrawQueue { get; }
+
+        public Image? WindowIcon { get; set; }
+
+        public string? Title
+        {
+            get => _title;
+            set
+            {
+                _title = value;
+                Window.Title = _title ?? "";
+            }
+        }
+        public Brush Background { get; set; } = new SolidColorBrush(Color.SlateGray);
+        public Control? FocusedControl { get; private set; } = null;
 
         public override Box2d ClientArea
         {
@@ -14,10 +32,64 @@ namespace Dashboard.Controls
             set { }
         }
 
+        public event EventHandler<WindowCloseEvent>? Closing;
+
         public Form(IWindow window)
         {
             Window = window;
-            DrawQueue = (window as IDrawQueuePaintable)?.DrawQueue ?? new DrawQueue();
+            window.Form = this;
+
+            Window.Title = _title;
+        }
+
+        public void Focus(Control control)
+        {
+            if (FocusedControl != null)
+                InvokeFocusLost(this, FocusedControl);
+
+            FocusedControl = control;
+            InvokeFocusGained(this, control);
+        }
+
+        public override void OnPaint(DeviceContext dc)
+        {
+            dc.Begin();
+
+            var dcb = dc.ExtensionRequire<IDeviceContextBase>();
+            dcb.ResetClip();
+            dcb.ResetScissor();
+            dcb.ResetTransforms();
+
+            if (Background is SolidColorBrush solidColorBrush)
+                dcb.ClearColor(solidColorBrush.Color);
+
+            foreach (Control child in this)
+                child.SendEvent(this, new PaintEventArgs(dc));
+
+            dc.End();
+        }
+
+        protected virtual void OnClosing(WindowCloseEvent ea)
+        {
+            Closing?.Invoke(this, ea);
+
+            if (ea.Cancel)
+                return;
+
+            Dispose();
+            Window.Dispose();
+        }
+
+        protected override void OnEventRaised(object? sender, EventArgs args)
+        {
+            base.OnEventRaised(sender, args);
+
+            switch (args)
+            {
+                case WindowCloseEvent close:
+                    OnClosing(close);
+                    break;
+            }
         }
     }
 }

Dashboard/Controls/ImageBox.cs

@@ -0,0 +1,27 @@
+using System.Numerics;
+using Dashboard.Drawing;
+using Dashboard.Pal;
+
+namespace Dashboard.Controls
+{
+    public class ImageBox : Control
+    {
+        public Image? Image { get; set; }
+
+        public override Vector2 CalculateIntrinsicSize()
+        {
+            return new Vector2(Image?.Width ?? 0, Image?.Height ?? 0);
+        }
+
+        public override void OnPaint(DeviceContext dc)
+        {
+            if (Image == null)
+                return;
+
+            // Layout.Size = CalculateIntrinsicSize();
+
+            // dc.ExtensionRequire<IImmediateMode>().Image(new Box2d(ClientArea.Min, ClientArea.Min + Layout.Size), new Box2d(0, 0, 1, 1), 0, Image.InternTexture(dc));
+            base.OnPaint(dc);
+        }
+    }
+}

Dashboard/Controls/Label.cs

@@ -2,36 +2,61 @@ using System;
 using System.Drawing;
 using System.Numerics;
 using Dashboard.Drawing;
+using Dashboard.Layout;
+using Dashboard.Pal;
 
 namespace Dashboard.Controls
 {
     public class Label : Control
     {
+        private Vector2 _intrinsicSize = Vector2.Zero;
+
         public bool AutoSize { get; set; } = true;
         public string Text { get; set; } = "";
 
         public event EventHandler? TextChanged;
 
-        protected IBrush TextBrush => throw new NotImplementedException();
+        // protected IBrush TextBrush => throw new NotImplementedException();
-        protected IFont Font => throw new NotImplementedException();
+        public Font Font { get; set; } = Drawing.Font.Create(new FontInfo("Rec Mono Linear"));
+        public float TextSize { get; set; } = 12f;
+        public Brush TextBrush { get; set; } = new SolidColorBrush(Color.Black);
 
-        protected virtual void OnTextChanged(string oldValue, string newValue)
+        public override Vector2 CalculateIntrinsicSize()
         {
+            return _intrinsicSize;
+        }
+
+        protected void CalculateSize(DeviceContext dc)
+        {
+            Box2d box = dc.ExtensionRequire<ITextRenderer>().MeasureText(Font.Base, TextSize, Text);
+            // _intrinsicSize = box.Size;
+            // Layout.Size = box.Size;
+            // ClientArea = new Box2d(ClientArea.Min, ClientArea.Min + Layout.Size);
+        }
+
+        public override void OnPaint(DeviceContext dc)
+        {
+            base.OnPaint(dc);
+
             if (AutoSize)
-                CalculateSize();
+                CalculateSize(dc);
-        }
 
-        protected void CalculateSize()
+            bool hidden = Layout.OverflowMode == OverflowMode.Hidden;
-        {
+            var dcb = dc.ExtensionRequire<IDeviceContextBase>();
-            SizeF sz = Typesetter.MeasureString(Font, Text);
+            if (hidden)
-            ClientArea = new Box2d(ClientArea.Min, ClientArea.Min + (Vector2)sz);
+                dcb.PushScissor(ClientArea);
-        }
 
+            dcb.PushTransforms(Matrix4x4.CreateTranslation(ClientArea.Left, ClientArea.Top, 0));
 
-        public override void OnPaint()
+            var text = dc.ExtensionRequire<ITextRenderer>();
-        {
+            Color color = (TextBrush as SolidColorBrush)?.Color ?? Color.Black;
-            base.OnPaint();
+            Vector4 colorVector = new Vector4(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
-            DrawQueue.Text(new Vector3(ClientArea.Min, 0), TextBrush, Text, Font);
+            text.DrawText(Vector2.Zero, colorVector, TextSize, Font.Base, Text);
+
+            if (hidden)
+                dcb.PopScissor();
+
+            dcb.PopTransforms();
         }
     }
 }

Dashboard/Controls/MessageBox.cs

@@ -0,0 +1,242 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.IO;
+using System.Reflection;
+using Dashboard.Drawing;
+using Dashboard.Windowing;
+
+namespace Dashboard.Controls
+{
+    public enum MessageBoxIcon
+    {
+        Info,
+        Question,
+        Warning,
+        Error,
+        Custom,
+    }
+
+    public enum MessageBoxButtons
+    {
+        AbortRetryIgnore,
+        CancelRetryContinue,
+        Ok,
+        OkCancel,
+        RetryCancel,
+        YesNo,
+        YesNoCancel,
+        Custom,
+    }
+
+    /// <summary>
+    /// A simple message box dialog.
+    /// </summary>
+    public class MessageBox : Form
+    {
+        private MessageBoxIcon _icon;
+        private MessageBoxButtons _buttons;
+        private ImageBox _iconBox = new ImageBox();
+        private Label  _label = new Label();
+        private Container _main = new Container();
+        private Container _buttonsContainer = new Container();
+
+        private Image? IconImage
+        {
+            get => _iconBox.Image;
+            set => _iconBox.Image = value;
+        }
+
+        public MessageBoxIcon Icon
+        {
+            get => _icon;
+            set
+            {
+                IconImage = value switch
+                {
+                    MessageBoxIcon.Question => s_questionIcon,
+                    MessageBoxIcon.Info => s_infoIcon,
+                    MessageBoxIcon.Warning => s_warningIcon,
+                    MessageBoxIcon.Error => s_errorIcon,
+                    _ => null,
+                };
+
+                _icon = value;
+            }
+        }
+
+        public Image? CustomImage
+        {
+            get => Icon == MessageBoxIcon.Custom ? IconImage : null;
+            set
+            {
+                if (IconImage == null)
+                    return;
+                Icon = MessageBoxIcon.Custom;
+                IconImage = value;
+            }
+        }
+
+        public string? Message
+        {
+            get => _label.Text;
+            set => _label.Text = value ?? String.Empty;
+        }
+
+        public MessageBoxButtons Buttons
+        {
+            get => _buttons;
+            set
+            {
+                _buttons = value;
+                UpdateButtons();
+            }
+        }
+        public ObservableCollection<string> CustomButtons { get; } = new ObservableCollection<string>();
+        public int Result { get; private set; } = -1;
+
+        public MessageBox(IWindow window) : base(window)
+        {
+            // Layout.Rows.Clear();
+            // Layout.Rows.Add(-1);
+            // Layout.Rows.Add(48);
+            //
+            // Add(_main);
+            // _main.Layout.Columns.Clear();
+            // _main.Layout.Columns.Add(48);
+            // _main.Layout.Columns.Add(-1);
+
+            _main.Add(_iconBox);
+            _main.Add(_label);
+            _label.Layout.Column = 1;
+
+            Add(_buttonsContainer);
+            _buttonsContainer.Layout.Row = 1;
+
+            CustomButtons.CollectionChanged += (sender, ea) => UpdateButtons();
+
+            UpdateButtons();
+        }
+
+        private void UpdateButtons()
+        {
+            foreach (Control button in _buttonsContainer)
+            {
+                Remove(button);
+            }
+
+            IList<string> list = Buttons switch
+            {
+                MessageBoxButtons.Custom => CustomButtons,
+                MessageBoxButtons.AbortRetryIgnore => s_abortRetryContinue,
+                MessageBoxButtons.CancelRetryContinue => s_cancelRetryContinue,
+                MessageBoxButtons.OkCancel => s_okCancel,
+                MessageBoxButtons.RetryCancel => s_retryCancel,
+                MessageBoxButtons.YesNo => s_yesNo,
+                MessageBoxButtons.YesNoCancel => s_yesNoCancel,
+                _ => s_ok,
+            };
+
+            // _buttonsContainer.Clear();
+            // _buttonsContainer.Layout.Columns.Clear();
+            // for (int i = 0; i < list.Count; i++)
+            // {
+            //     _buttonsContainer.Layout.Columns.Add(-1);
+            //     string str = list[i];
+            //
+            //     Button button = new Button() { Text = str };
+            //     button.Clicked += (sender, ea) => ButtonClicked(sender, ea, i);
+            //     button.Layout.Column = i;
+            //     _buttonsContainer.Add(button);
+            //     Add(button);
+            // }
+        }
+
+        private void ButtonClicked(object? sender, EventArgs ea, int i)
+        {
+            Result = i;
+            Dispose();
+        }
+
+        public static readonly Image s_questionIcon;
+        public static readonly Image s_infoIcon;
+        public static readonly Image s_warningIcon;
+        public static readonly Image s_errorIcon;
+
+        private static readonly ImmutableList<string> s_abortRetryContinue  = ["Abort", "Retry", "Continue"];
+        private static readonly ImmutableList<string> s_cancelRetryContinue = ["Cancel", "Retry", "Continue"];
+        private static readonly ImmutableList<string> s_ok = ["OK"];
+        private static readonly ImmutableList<string> s_okCancel = ["OK", "Cancel"];
+        private static readonly ImmutableList<string> s_retryCancel = ["Retry", "Cancel"];
+        private static readonly ImmutableList<string> s_yesNo = ["Yes", "No"];
+        private static readonly ImmutableList<string> s_yesNoCancel = ["Yes", "No", "Cancel"];
+
+        static MessageBox()
+        {
+            Assembly asm = typeof(MessageBox).Assembly;
+            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.question.png")!)
+                s_questionIcon = Image.Load(str);
+            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.info.png")!)
+                s_infoIcon = Image.Load(str);
+            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.warning.png")!)
+                s_warningIcon = Image.Load(str);
+            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.error.png")!)
+                s_errorIcon = Image.Load(str);
+        }
+
+        public static MessageBox Create(IWindow window, string message, string title, MessageBoxIcon icon, MessageBoxButtons buttons)
+        {
+            return new MessageBox(window)
+            {
+                Message = message,
+                Title = title,
+                Icon = icon,
+                Buttons = buttons,
+            };
+        }
+
+        // public static MessageBox Create(IWindow window, string message, string title, Image icon, IEnumerable<string> buttons)
+        // {
+        //     throw new NotImplementedException();
+        // }
+
+        private static string GetDefaultTitle(MessageBoxIcon icon)
+        {
+            return icon switch
+            {
+                MessageBoxIcon.Error => "Error",
+                MessageBoxIcon.Info => "Info",
+                MessageBoxIcon.Question => "Question",
+                MessageBoxIcon.Warning => "Warning",
+                _ => "Message Box",
+            };
+        }
+
+        private static Image GetDefaultIcon(MessageBoxIcon icon)
+        {
+            return icon switch
+            {
+                MessageBoxIcon.Error => s_errorIcon,
+                MessageBoxIcon.Question => s_questionIcon,
+                MessageBoxIcon.Warning => s_warningIcon,
+                _ => s_infoIcon,
+            };
+        }
+
+        private static ImmutableList<string> GetDefaultButtons(MessageBoxButtons buttons)
+        {
+            return buttons switch
+            {
+                MessageBoxButtons.AbortRetryIgnore => s_abortRetryContinue,
+                MessageBoxButtons.CancelRetryContinue => s_cancelRetryContinue,
+                MessageBoxButtons.OkCancel => s_okCancel,
+                MessageBoxButtons.RetryCancel => s_retryCancel,
+                MessageBoxButtons.YesNo => s_yesNo,
+                MessageBoxButtons.YesNoCancel => s_yesNoCancel,
+                _ => s_ok,
+            };
+        }
+    }
+}

Dashboard/Dashboard.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Dashboard.Common\Dashboard.Common.csproj" />
-    <ProjectReference Include="..\Dashboard.Drawing\Dashboard.Drawing.csproj" />
+    <EmbeddedResource Include="Resources\**\*.png"/>
   </ItemGroup>
 
 </Project>

Dashboard/IDashboardBackend.cs

@@ -1,29 +0,0 @@
-using System;
-using Dashboard.Windowing;
-
-namespace Dashboard
-{
-    public interface IWindowFactory
-    {
-        /// <summary>
-        /// Creates a window. It could be a virtual window, or a physical window.
-        /// </summary>
-        /// <returns>A window.</returns>
-        IWindow CreateWindow();
-
-        /// <summary>
-        /// Always creates a physical window.
-        /// </summary>
-        /// <returns>A physical window.</returns>
-        IPhysicalWindow CreatePhysicalWindow();
-    }
-
-    public interface IDashboardBackend : IDisposable, IWindowFactory
-    {
-        void Initialize();
-
-        void RunEvents(bool wait);
-
-        void Leave();
-    }
-}

Dashboard/Resources/error.svg

@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="48"
+   height="48"
+   viewBox="0 0 12.7 12.7"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.2 (ebf0e940d0, 2025-05-08)"
+   sodipodi:docname="error.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="6.0664802"
+     inkscape:cx="-5.7694081"
+     inkscape:cy="25.962336"
+     inkscape:window-width="2560"
+     inkscape:window-height="1364"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1"
+     showguides="true">
+    <sodipodi:guide
+       position="6.3500001,12.7"
+       orientation="-1,0"
+       id="guide1"
+       inkscape:locked="false"
+       inkscape:label=""
+       inkscape:color="rgb(0,134,229)" />
+    <sodipodi:guide
+       position="3.705891,12.686148"
+       orientation="-1,0"
+       id="guide2"
+       inkscape:label=""
+       inkscape:locked="false"
+       inkscape:color="rgb(0,134,229)" />
+  </sodipodi:namedview>
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       sodipodi:type="star"
+       style="fill:#ff0000;stroke:#d60000;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none;stroke-opacity:1"
+       id="path1"
+       inkscape:flatsided="true"
+       sodipodi:sides="8"
+       sodipodi:cx="6.3499999"
+       sodipodi:cy="6.3499999"
+       sodipodi:r1="6.8657174"
+       sodipodi:r2="8.2966747"
+       sodipodi:arg1="1.9608592"
+       sodipodi:arg2="2.3535583"
+       inkscape:rounded="0"
+       inkscape:randomized="0"
+       d="M 3.7393344,12.7 0.01385251,8.9941088 -2.0290497e-7,3.7393344 3.705891,0.01385251 8.9606654,-2.0290497e-7 12.686147,3.705891 12.7,8.9606654 8.9941088,12.686147 Z"
+       transform="matrix(0.92700733,0,0,0.92700733,0.46350342,0.46350342)" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:9.87777px;line-height:normal;font-family:'Rec Mono Linear';-inkscape-font-specification:'Rec Mono Linear Bold';text-align:center;text-decoration-color:#000000;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;direction:ltr;text-orientation:upright;text-anchor:middle;fill:#ffffff;stroke:none;stroke-width:0.600001"
+       x="6.3154373"
+       y="9.0071211"
+       id="text1"><tspan
+         sodipodi:role="line"
+         id="tspan1"
+         style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:'Rec Mono Linear';-inkscape-font-specification:'Rec Mono Linear Bold';fill:#ffffff;stroke-width:0.6"
+         x="6.3154373"
+         y="9.0071211">x</tspan></text>
+  </g>
+</svg>

Dashboard/Resources/info.svg

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="48"
+   height="48"
+   viewBox="0 0 12.7 12.7"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.2 (ebf0e940d0, 2025-05-08)"
+   sodipodi:docname="info.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="15.987983"
+     inkscape:cx="14.823634"
+     inkscape:cy="21.234699"
+     inkscape:window-width="2560"
+     inkscape:window-height="1364"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <rect
+       style="fill:#00b200;fill-opacity:1;stroke:#009900;stroke-width:0.573001;stroke-dasharray:none;stroke-opacity:1"
+       id="rect1"
+       width="12.127"
+       height="12.127"
+       x="0.28650019"
+       y="0.28650019"
+       rx="1.0105833"
+       ry="1.0105834" />
+    <text
+       xml:space="preserve"
+       style="font-style:italic;font-size:9.87777px;line-height:normal;font-family:'Rec Mono Linear';-inkscape-font-specification:'Rec Mono Linear Italic';text-align:center;text-decoration-color:#000000;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;direction:ltr;text-orientation:upright;text-anchor:middle;fill:#f9f9f9;stroke:none;stroke-width:0.600001"
+       x="6.3351822"
+       y="10.172698"
+       id="text1"><tspan
+         sodipodi:role="line"
+         id="tspan1"
+         style="font-style:italic;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:'Rec Mono Linear';-inkscape-font-specification:'Rec Mono Linear Bold Italic';fill:#f9f9f9;stroke-width:0.6"
+         x="6.3351822"
+         y="10.172698">i</tspan></text>
+  </g>
+</svg>

Dashboard/Resources/question.svg

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="48"
+   height="48"
+   viewBox="0 0 12.7 12.7"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.2 (ebf0e940d0, 2025-05-08)"
+   sodipodi:docname="question.svg"
+   xml:space="preserve"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"><sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="6.4560796"
+     inkscape:cx="12.701206"
+     inkscape:cy="14.172688"
+     inkscape:window-width="2560"
+     inkscape:window-height="1364"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1"
+     showguides="true"><sodipodi:guide
+       position="6.3500001,12.7"
+       orientation="-1,0"
+       id="guide1"
+       inkscape:locked="false"
+       inkscape:label=""
+       inkscape:color="rgb(0,134,229)" /><sodipodi:guide
+       position="3.705891,12.686148"
+       orientation="-1,0"
+       id="guide2"
+       inkscape:label=""
+       inkscape:locked="false"
+       inkscape:color="rgb(0,134,229)" /></sodipodi:namedview><defs
+     id="defs1" /><g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"><circle
+       style="fill:#0000ff;stroke:#0000cc;stroke-width:0.9271;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none;stroke-opacity:1"
+       id="path2"
+       cx="6.3500004"
+       cy="6.3500004"
+       r="5.8864961" /><text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:9.87777px;line-height:normal;font-family:'Rec Mono Linear';-inkscape-font-specification:'Rec Mono Linear Bold';text-align:center;text-decoration-color:#000000;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;direction:ltr;text-orientation:upright;text-anchor:middle;fill:#ffffff;stroke:none;stroke-width:0.600001"
+       x="6.2907381"
+       y="9.8615408"
+       id="text1"><tspan
+         sodipodi:role="line"
+         id="tspan1"
+         style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-family:'Rec Mono Linear';-inkscape-font-specification:'Rec Mono Linear Bold';fill:#ffffff;stroke-width:0.6"
+         x="6.2907381"
+         y="9.8615408">?</tspan></text></g></svg>

Dashboard/Resources/warning.svg

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="48"
+   height="48"
+   viewBox="0 0 12.7 12.7"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.2 (ebf0e940d0, 2025-05-08)"
+   sodipodi:docname="warning.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="1"
+     inkscape:cx="23"
+     inkscape:cy="24.5"
+     inkscape:window-width="2560"
+     inkscape:window-height="1364"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1"
+     showguides="true">
+    <sodipodi:guide
+       position="6.3500001,12.7"
+       orientation="-1,0"
+       id="guide1"
+       inkscape:locked="false"
+       inkscape:label=""
+       inkscape:color="rgb(0,134,229)" />
+  </sodipodi:namedview>
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       style="fill:#ffcc00;stroke:#ffbb00;stroke-width:0.9271;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:none;stroke-opacity:1"
+       d="M 0.46350557,12.236497 6.3500001,0.46350801 12.236494,12.236497 Z"
+       id="path1"
+       sodipodi:nodetypes="cccc" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:9.87777px;line-height:normal;font-family:'Rec Mono Linear';-inkscape-font-specification:'Rec Mono Linear Bold';text-align:center;text-decoration-color:#000000;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;direction:ltr;text-orientation:upright;text-anchor:middle;fill:#ffcc00;stroke:none;stroke-width:0.600001"
+       x="6.2858014"
+       y="10.821102"
+       id="text1"><tspan
+         sodipodi:role="line"
+         id="tspan1"
+         style="fill:#000000;stroke-width:0.6;-inkscape-font-specification:'Rec Mono Linear Bold';font-family:'Rec Mono Linear';font-weight:bold;font-style:normal;font-stretch:normal;font-variant:normal"
+         x="6.2858014"
+         y="10.821102">!</tspan></text>
+  </g>
+</svg>

tests/Dashboard.TestApplication/Dashboard.TestApplication.csproj

@@ -8,14 +8,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\Dashboard.Drawing.OpenGL\Dashboard.Drawing.OpenGL.csproj" />
+    <ProjectReference Include="..\..\Dashboard.BlurgText.OpenGL\Dashboard.BlurgText.OpenGL.csproj" />
-    <ProjectReference Include="..\..\Dashboard.Drawing\Dashboard.Drawing.csproj" />
+    <ProjectReference Include="..\..\Dashboard.BlurgText\Dashboard.BlurgText.csproj" />
-    <ProjectReference Include="..\..\Dashboard.ImmediateUI\Dashboard.ImmediateUI.csproj" />
     <ProjectReference Include="..\..\Dashboard.OpenTK\Dashboard.OpenTK.csproj" />
+    <ProjectReference Include="..\..\Dashboard.StbImage\Dashboard.StbImage.csproj" />
   </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="OpenTK" Version="5.0.0-pre.13" />
-  </ItemGroup>
-
 </Project>

tests/Dashboard.TestApplication/Program.cs

@@ -1,15 +1,15 @@
-using Dashboard.Drawing;
+using Dashboard.BlurgText;
-using System.Drawing;
+using Dashboard.BlurgText.OpenGL;
-using System.Text;
+using Dashboard.Controls;
-using Dashboard.Drawing.OpenGL;
+using Dashboard.Drawing;
-using Dashboard.ImmediateUI;
+using Dashboard.OpenGL;
 using Dashboard.OpenTK.PAL2;
-using OpenTK.Platform;
+using Dashboard.Pal;
+using Dashboard.StbImage;
 using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
-using Box2d = Dashboard.Box2d;
+using OpenTK.Platform;
 using TK = OpenTK.Platform.Toolkit;
-using Dashboard;
 
 TK.Init(new ToolkitOptions()
 {
@@ -18,10 +18,11 @@ TK.Init(new ToolkitOptions()
     {
         EnableVisualStyles = true,
         IsDPIAware = true,
-    }
+    },
+    FeatureFlags = ToolkitFlags.EnableOpenGL,
 });
 
-Application app = new Application(new Pal2DashboardBackend() 
+Application app = new Pal2Application()
 {
     GraphicsApiHints = new OpenGLGraphicsApiHints()
     {
@@ -41,136 +42,45 @@ Application app = new Application(new Pal2DashboardBackend()
 
         SupportTransparentFramebufferX11 = true,
     }
-});
-
-PhysicalWindow window;
-SolidBrush fg = new SolidBrush(Color.FromArgb(0, 0, 0, 0));
-SolidBrush bg = new SolidBrush(Color.Black);
-CancellationTokenSource source = new CancellationTokenSource();
-GLEngine engine;
-ContextExecutor executor;
-DimUI dimUI;
-Vector2 mousePos = Vector2.Zero;
-Random r = new Random();
-List<Vector3> points = new List<Vector3>();
-IFont font;
-StringBuilder builder = new StringBuilder();
-
-app.PostInitializing += (sender, ea) => {
-    window = (PhysicalWindow)app.CreatePhysicalWindow();
-
-    window.Title = "DashTerm";
-    TK.Window.SetMinClientSize(window.WindowHandle, 300, 200);
-    TK.Window.SetClientSize(window.WindowHandle, new Vector2i(320, 240));
-    TK.Window.SetBorderStyle(window.WindowHandle, WindowBorderStyle.ResizableBorder);
-    // TK.Window.SetTransparencyMode(wnd, WindowTransparencyMode.TransparentFramebuffer, 0.1f);
-
-    OpenGLDeviceContext context = (OpenGLDeviceContext)window.DeviceContext;
-
-    context.MakeCurrent();
-    context.SwapGroup.SwapInterval = 1;
-
-    engine = new GLEngine();
-    engine.Initialize();
-    
-    executor = engine.GetExecutor(context);
-
-    dimUI = new DimUI(new DimUIConfig()
-    {
-        Font = new NamedFont("Noto Sans", 9f),
-    });
-
-    EventQueue.EventRaised += (handle, type, eventArgs) =>
-    {
-        if (handle != window.WindowHandle)
-            return;
-
-        switch (type)
-        {
-            case PlatformEventType.Close:
-                source.Cancel();
-                break;
-            case PlatformEventType.MouseMove:
-                mousePos = ((MouseMoveEventArgs)eventArgs).ClientPosition;
-                break;
-        }
-    };
-
-    TK.Window.SetMode(window.WindowHandle, WindowMode.Normal);
-    font = Typesetter.LoadFont("Nimbus Mono", 12f);
-
-    window.Painting += (sender, ea) => {
-            TK.Window.GetFramebufferSize(context.WindowHandle, out Vector2i framebufferSize);
-            executor.BeginFrame();
-
-            dimUI.Begin(new Box2d(0, 0, framebufferSize.X, framebufferSize.Y), window.DrawQueue);
-            dimUI.Text("Hello World!");
-            dimUI.Button("Cancel"); dimUI.SameLine();
-            dimUI.Button("OK");
-
-            dimUI.Input("type me!", builder);
-
-            dimUI.BeginMenu();
-
-            if (dimUI.MenuItem("File"))
-            {
-                dimUI.BeginMenu();
-                dimUI.MenuItem("New Window");
-                dimUI.MenuItem("Preferences");
-                dimUI.MenuItem("Exit");
-                dimUI.EndMenu();
-            }
-
-            if (dimUI.MenuItem("Edit"))
-            {
-                dimUI.BeginMenu();
-                dimUI.MenuItem("Cut");
-                dimUI.MenuItem("Copy");
-                dimUI.MenuItem("Paste");
-
-                if (dimUI.MenuItem("Send Char"))
-                {
-                    dimUI.BeginMenu();
-                    dimUI.EndMenu();
-                }
-
-                dimUI.EndMenu();
-            }
-
-            if (dimUI.MenuItem("View"))
-            {
-                dimUI.BeginMenu();
-                dimUI.MenuItem("Clear");
-
-                if (dimUI.MenuItem("Set Size"))
-                {
-                    dimUI.BeginMenu();
-                    dimUI.MenuItem("24 x 40");
-                    dimUI.MenuItem("25 x 40");
-                    dimUI.MenuItem("24 x 80");
-                    dimUI.MenuItem("25 x 80");
-                    dimUI.MenuItem("25 x 120");
-                    dimUI.EndMenu();
-                }
-
-                dimUI.EndMenu();
-            }
-
-            dimUI.Finish();
-
-            GL.Viewport(0, 0, framebufferSize.X, framebufferSize.Y);
-            GL.ClearColor(0.3f, 0.3f, 0.3f, 1.0f);
-            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
-            GL.Disable(EnableCap.DepthTest);
-            GL.Enable(EnableCap.Blend);
-            GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
-            GL.ColorMask(true, true, true, true);
-
-            executor.Draw(window.DrawQueue);
-            executor.EndFrame();
-
-            context.SwapGroup.Swap();
-    };
 };
 
+CancellationTokenSource source = new CancellationTokenSource();
+
+app.Initialize();
+app.ExtensionRequire<StbImageLoader>();
+app.ExtensionLoad(new BlurgTextExtension(new BlurgTextExtensionFactory()));
+
+PhysicalWindow window = (PhysicalWindow)app.CreatePhysicalWindow();
+MessageBox box = MessageBox.Create(window, "Are you sure you want to exit?", "Confirm Exit", MessageBoxIcon.Question,
+    MessageBoxButtons.YesNo);
+
+// window.Title = "DashTerm";
+TK.Window.SetMinClientSize(window.WindowHandle, 300, 200);
+TK.Window.SetClientSize(window.WindowHandle, new Vector2i(320, 240));
+TK.Window.SetBorderStyle(window.WindowHandle, WindowBorderStyle.ResizableBorder);
+// TK.Window.SetTransparencyMode(wnd, WindowTransparencyMode.TransparentFramebuffer, 0.1f);
+
+GLDeviceContext context = (GLDeviceContext)window.DeviceContext;
+
+context.GLContext.MakeCurrent();
+context.GLContext.SwapGroup.SwapInterval = 1;
+
+GL.Disable(EnableCap.DepthTest);
+GL.Enable(EnableCap.Blend);
+GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
+GL.ColorMask(true, true, true, true);
+
+TK.Window.SetMode(window.WindowHandle, WindowMode.Normal);
+
+window.DeviceContext.ExtensionRequire<IDeviceContextBase>().ScaleOverride = 1.5f;
+
 app.Run(true, source.Token);
+
+
+class BlurgTextExtensionFactory : IBlurgDcExtensionFactory
+{
+    public BlurgDcExtension CreateExtension(BlurgTextExtension appExtension, DeviceContext dc)
+    {
+        return new BlurgGLExtension();
+    }
+};