Create a new context system for dashboard.

Dashboard.Common/ImageProperties.cs

@@ -6,16 +6,31 @@ namespace Dashboard
     /// <summary>
     /// Pixel format for images.
     /// </summary>
+    [Flags]
     public enum PixelFormat
     {
-        R8I,
-        Rg8I,
-        Rgb8I,
-        Rgba8I,
-        R16F,
-        Rg816F,
-        Rgb16F,
-        Rgba16F,
+        None = 0,
+
+        R8I     = R    | I8,
+        Rg8I    = Rg   | I8,
+        Rgb8I   = Rgb  | I8,
+        Rgba8I  = Rgba | I8,
+        R16F    = R    | F16,
+        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/Pal/AppContext.cs

@@ -0,0 +1,136 @@
+using Dashboard.Collections;
+using Dashboard.Windowing;
+
+namespace Dashboard.Pal
+{
+    public abstract class AppContext : IContextBase<AppContext, IAppContextExtension>
+    {
+        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; }
+
+        private readonly TypeDictionary<IAppContextExtension> _extensions =
+            new TypeDictionary<IAppContextExtension>(true);
+        private readonly TypeDictionary<IAppContextExtension, Func<IAppContextExtension>> _preloadedExtensions =
+            new TypeDictionary<IAppContextExtension, Func<IAppContextExtension>>(true);
+
+        ~AppContext()
+        {
+            InvokeDispose(false);
+        }
+
+        public void Initialize()
+        {
+            if (IsInitialized)
+                return;
+
+            IsInitialized = true;
+
+            InitializeInternal();
+        }
+
+        protected virtual void InitializeInternal()
+        {
+        }
+
+        public virtual void RunEvents(bool wait)
+        {
+            if (!IsInitialized)
+                Initialize();
+        }
+
+        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);
+            }
+        }
+
+        #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();
+        #endregion
+
+        public bool IsExtensionAvailable<T>() where T : IAppContextExtension
+        {
+            return _extensions.Contains<T>() || _preloadedExtensions.Contains<T>();
+        }
+
+        public bool ExtensionPreload<T>() where T : IAppContextExtension, new()
+        {
+            return _preloadedExtensions.Add<T>(() => new T());
+        }
+
+        public T ExtensionRequire<T>() where T : IAppContextExtension, new()
+        {
+            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<IAppContextExtension>? loader))
+                {
+                    extension = (T)loader!();
+                }
+                else
+                {
+                    extension = new T();
+                }
+
+                _extensions.Add(extension);
+                extension.Require(this);
+            }
+
+            return extension;
+        }
+
+        protected virtual void Dispose(bool isDisposing)
+        {
+            if (!isDisposing) return;
+
+            foreach (IAppContextExtension 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/DeviceContext.cs

@@ -0,0 +1,98 @@
+using Dashboard.Collections;
+
+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);
+
+        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; }
+
+        ~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>() where T : IDeviceContextExtension, new()
+        {
+            return _preloadedExtensions.Add<T>(() => new T());
+        }
+
+        public T ExtensionRequire<T>() where T : IDeviceContextExtension, new()
+        {
+            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 = new T();
+                }
+
+                _extensions.Add(extension);
+                extension.Require(this);
+            }
+
+            return extension;
+        }
+
+        /// <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/IAppContextExtension.cs

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

Dashboard.Common/Pal/IContextBase.cs

@@ -0,0 +1,103 @@
+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>
+        /// Require an extension.
+        /// </summary>
+        /// <typeparam name="T">The extension to require.</typeparam>
+        /// <returns>The extension instance.</returns>
+        T ExtensionRequire<T>() where T : TExtension, new();
+    }
+
+    /// <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/Pal/ITextureExtension.cs

@@ -0,0 +1,83 @@
+using System.Drawing;
+
+namespace Dashboard.Pal
+{
+    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.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/Pal/GLDeviceContext.cs

@@ -0,0 +1,160 @@
+using System.Collections.Concurrent;
+using System.Collections.Immutable;
+using Dashboard.OpenGL;
+using Dashboard.Pal;
+using OpenTK;
+using OpenTK.Graphics;
+using OpenTK.Graphics.OpenGL;
+
+namespace Dashboard.Drawing.OpenGL.Pal
+{
+    internal class GLContextBindingsContext(IGLContext context) : IBindingsContext
+    {
+        public IntPtr GetProcAddress(string procName)
+        {
+            return context.GetProcAddress(procName);
+        }
+    }
+
+    public class GLDeviceContext : DeviceContext
+    {
+        public IGLContext GLContext { get; }
+
+        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(IGLContext context)
+        {
+            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<GLTextureExtension>();
+        }
+
+        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();
+
+            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.Drawing.OpenGL/Pal/GLTextureExtension.cs

@@ -0,0 +1,257 @@
+using System.Drawing;
+using Dashboard.Pal;
+using OpenTK.Graphics.OpenGL;
+using OGL = OpenTK.Graphics.OpenGL;
+
+namespace Dashboard.Drawing.OpenGL.Pal
+{
+    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()
+        {
+            throw new NotImplementedException();
+        }
+
+
+        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;
+
+        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;
+            }
+
+            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.Byte, IntPtr.Zero);
+                        break;
+                    case TextureType.Texture2D:
+                        GL.TexImage2D(Target, 0, (InternalFormat)glFormat, width, height, 0, (OGL.PixelFormat)glFormat, PixelType.Byte, 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.Byte, IntPtr.Zero);
+                        break;
+                }
+            }
+        }
+
+        public void Read<T>(Span<T> buffer, int level = 0, int align = 0) where T : unmanaged
+        {
+            throw new NotImplementedException();
+        }
+
+        public unsafe void Write<T>(PixelFormat format, ReadOnlySpan<T> buffer, int level = 0, int align = 4) where T : unmanaged
+        {
+            if (!Context.IsRenderThread)
+            {
+                throw new NotImplementedException();
+            }
+
+            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.Byte,
+                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);
+        }
+
+        public void Dispose()
+        {
+            throw new NotImplementedException();
+        }
+
+        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

@@ -28,5 +28,7 @@ namespace Dashboard.OpenGL
         /// Activate this OpenGL Context.
         /// </summary>
         void MakeCurrent();
+
+        IntPtr GetProcAddress(string procName);
     }
 }

Dashboard.OpenTK/PAL2/OpenGLDeviceContext.cs

@@ -40,6 +40,11 @@ namespace Dashboard.OpenTK.PAL2
             TK.OpenGL.SetCurrentContext(ContextHandle);
         }
 
+        public IntPtr GetProcAddress(string procName)
+        {
+            return TK.OpenGL.GetProcedureAddress(ContextHandle, procName);
+        }
+
         private bool _isDisposed = false;
 
         public void Dispose() => Dispose(true);

Dashboard.OpenTK/PAL2/Pal2AppContext.cs

@@ -0,0 +1,56 @@
+using Dashboard.Windowing;
+using OpenTK.Graphics;
+using OpenTK.Platform;
+using AppContext = Dashboard.Pal.AppContext;
+using TK = OpenTK.Platform.Toolkit;
+
+namespace Dashboard.OpenTK.PAL2
+{
+    public class Pal2AppContext : AppContext
+    {
+        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();
+        public bool OpenGLBindingsInitialized { get; private set; } = false;
+
+        private readonly List<PhysicalWindow> _windows = new List<PhysicalWindow>();
+
+        public override IPhysicalWindow CreatePhysicalWindow()
+        {
+            PhysicalWindow window = new PhysicalWindow(GraphicsApiHints);
+            _windows.Add(window);
+
+            if (!OpenGLBindingsInitialized)
+            {
+                OpenGLBindingsInitialized = true;
+                GLLoader.LoadBindings(
+                    new Pal2BindingsContext(TK.OpenGL,
+                    ((OpenGLDeviceContext)window.DeviceContext).ContextHandle));
+            }
+
+            return window;
+        }
+
+        public override IWindow CreateWindow()
+        {
+            return CreatePhysicalWindow();
+        }
+
+        public override void RunEvents(bool wait)
+        {
+            TK.Window.ProcessEvents(wait);
+
+            for (int i = 0; i < _windows.Count; i++)
+            {
+                if (_windows[i].IsDisposed)
+                {
+                    _windows.RemoveAt(i);
+                    continue;
+                }
+
+                _windows[i].Paint();
+            }
+        }
+    }
+}

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/PhysicalWindow.cs

@@ -10,7 +10,7 @@ using TK = OpenTK.Platform.Toolkit;
 
 namespace Dashboard.OpenTK.PAL2
 {
-    public class PhysicalWindow : IPhysicalWindow, IDrawQueuePaintable, IEventListener
+    public class PhysicalWindow : IPhysicalWindow, IDrawQueuePaintable, IEventListener, IDpiAwareWindow
     {
         public DrawQueue DrawQueue { get; } = new DrawQueue();
         public WindowHandle WindowHandle { get; }
@@ -86,11 +86,11 @@ namespace Dashboard.OpenTK.PAL2
             }
         }
 
-        private bool _isDisposed = false;
+        public bool IsDisposed { get; private set; } = false;
         public void Dispose()
         {
-            if (_isDisposed) return;
-            _isDisposed = true;
+            if (IsDisposed) return;
+            IsDisposed = true;
 
             RemoveWindow(this);
 
@@ -160,5 +160,16 @@ namespace Dashboard.OpenTK.PAL2
                     break;
             }
         }
+
+        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/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/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();
-    }
-}

tests/Dashboard.TestApplication/Program.cs

@@ -10,6 +10,9 @@ using OpenTK.Mathematics;
 using Box2d = Dashboard.Box2d;
 using TK = OpenTK.Platform.Toolkit;
 using Dashboard;
+using Dashboard.Windowing;
+using OpenTK.Windowing.GraphicsLibraryFramework;
+using AppContext = Dashboard.Pal.AppContext;
 
 TK.Init(new ToolkitOptions()
 {
@@ -18,11 +21,12 @@ TK.Init(new ToolkitOptions()
     {
         EnableVisualStyles = true,
         IsDPIAware = true,
-    }
+    },
+    FeatureFlags = ToolkitFlags.EnableOpenGL,
 });
 
-Application app = new Application(new Pal2DashboardBackend() 
-{ 
+AppContext app = new Pal2AppContext()
+{
     GraphicsApiHints = new OpenGLGraphicsApiHints()
     {
         Version = new Version(3, 2),
@@ -41,7 +45,7 @@ Application app = new Application(new Pal2DashboardBackend()
 
         SupportTransparentFramebufferX11 = true,
     }
-});
+};
 
 PhysicalWindow window;
 SolidBrush fg = new SolidBrush(Color.FromArgb(0, 0, 0, 0));
@@ -56,121 +60,121 @@ List<Vector3> points = new List<Vector3>();
 IFont font;
 StringBuilder builder = new StringBuilder();
 
-app.PostInitializing += (sender, ea) => {
-    window = (PhysicalWindow)app.CreatePhysicalWindow();
+app.Initialize();
 
-    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);
+window = (PhysicalWindow)app.CreatePhysicalWindow();
 
-    OpenGLDeviceContext context = (OpenGLDeviceContext)window.DeviceContext;
+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);
 
-    context.MakeCurrent();
-    context.SwapGroup.SwapInterval = 1;
+OpenGLDeviceContext context = (OpenGLDeviceContext)window.DeviceContext;
 
-    engine = new GLEngine();
-    engine.Initialize();
-    
-    executor = engine.GetExecutor(context);
+context.MakeCurrent();
+context.SwapGroup.SwapInterval = 1;
 
-    dimUI = new DimUI(new DimUIConfig()
+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)
     {
-        Font = new NamedFont("Noto Sans", 9f),
-    });
+        case PlatformEventType.Close:
+            source.Cancel();
+            break;
+        case PlatformEventType.MouseMove:
+            mousePos = ((MouseMoveEventArgs)eventArgs).ClientPosition;
+            break;
+    }
+};
 
-    EventQueue.EventRaised += (handle, type, eventArgs) =>
-    {
-        if (handle != window.WindowHandle)
-            return;
+TK.Window.SetMode(window.WindowHandle, WindowMode.Normal);
+font = Typesetter.LoadFont("Nimbus Mono", 12f);
 
-        switch (type)
+window.Painting += (sender, ea) => {
+        TK.Window.GetSize(context.WindowHandle, out Vector2i size);
+        executor.BeginFrame();
+
+        dimUI.Begin(new Box2d(0, 0, size.X, size.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"))
         {
-            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();
+            dimUI.MenuItem("New Window");
+            dimUI.MenuItem("Preferences");
+            dimUI.MenuItem("Exit");
+            dimUI.EndMenu();
+        }
 
-            if (dimUI.MenuItem("File"))
+        if (dimUI.MenuItem("Edit"))
+        {
+            dimUI.BeginMenu();
+            dimUI.MenuItem("Cut");
+            dimUI.MenuItem("Copy");
+            dimUI.MenuItem("Paste");
+
+            if (dimUI.MenuItem("Send Char"))
             {
                 dimUI.BeginMenu();
-                dimUI.MenuItem("New Window");
-                dimUI.MenuItem("Preferences");
-                dimUI.MenuItem("Exit");
                 dimUI.EndMenu();
             }
 
-            if (dimUI.MenuItem("Edit"))
+            dimUI.EndMenu();
+        }
+
+        if (dimUI.MenuItem("View"))
+        {
+            dimUI.BeginMenu();
+            dimUI.MenuItem("Clear");
+
+            if (dimUI.MenuItem("Set Size"))
             {
                 dimUI.BeginMenu();
-                dimUI.MenuItem("Cut");
-                dimUI.MenuItem("Copy");
-                dimUI.MenuItem("Paste");
-
-                if (dimUI.MenuItem("Send Char"))
-                {
-                    dimUI.BeginMenu();
-                    dimUI.EndMenu();
-                }
-
+                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();
             }
 
-            if (dimUI.MenuItem("View"))
-            {
-                dimUI.BeginMenu();
-                dimUI.MenuItem("Clear");
+            dimUI.EndMenu();
+        }
 
-                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.Finish();
 
-                dimUI.EndMenu();
-            }
+        GL.Viewport(0, 0, size.X, size.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);
 
-            dimUI.Finish();
+        executor.Draw(window.DrawQueue, new RectangleF(0, 0, size.X, size.Y), 1.5f /*(window as IDpiAwareWindow)?.Scale ?? 1*/);
+        executor.EndFrame();
 
-            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();
-    };
+        context.SwapGroup.Swap();
 };
 
 app.Run(true, source.Token);