b

Program.cs

@@ -1,42 +1,63 @@
 using System.Numerics;
+using System.Reflection;
 using System.Runtime.CompilerServices;
 using Hexa.NET.ImGui;
 using Hexa.NET.ImPlot;
-using Hexa.NET.ImPlot3D;
+using HexaGen.Runtime;
 using SDL3_TestingSuite.SDL3;
-using SDL3;
 
 namespace SDL3_TestingSuite;
 
 public class Program
 {
     private static bool _demoWindowVisible = true;
+    private static bool _imPlotDemoVisible;
     private static bool _fontStuff;
     private static readonly Dictionary<string, List<uint>?> GlyphsByName = new Dictionary<string, List<uint>?>();
-    private static bool _initialized;
+    private static bool _fontStuffInitialized;
+    private static bool _init;
     private static ImFontPtr _font;
     private static float size = 1f;
+    private static SDL3Window _window = null!;
+    private static OpenGLTexture? _imageTexture;
+    private static string? _imageLoadError;
 
     public static void Main()
     {
-        const SDL.WindowFlags flags = SDL.WindowFlags.Resizable | SDL.WindowFlags.HighPixelDensity | SDL.WindowFlags.Transparent; 
+        string baseDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!;
-        SDL3Window window = new SDL3Window("SDL3 Testing Suite", 100, 100, 1280, 720, flags);
+        string osPlatform = typeof(LibraryLoader).GetMethod("GetOSPlatform", BindingFlags.Static | BindingFlags.NonPublic)?.Invoke(null, null) as string ?? "";     // LibraryLoader.GetOSPlatform();
-        window.ClearColor.W = 0f;
+        string architecture = typeof(LibraryLoader).GetMethod("GetArchitecture", BindingFlags.Static | BindingFlags.NonPublic)?.Invoke(null, null) as string ?? ""; // LibraryLoader.GetArchitecture());
-        window.RenderCallback = () =>
+        LibraryLoader.CustomLoadFolders.AddRange(new string[]
         {
+            Path.Combine(baseDirectory),
+            Path.Combine(baseDirectory, "runtimes", osPlatform, "native"),
+            Path.Combine(baseDirectory, "runtimes", $"{osPlatform}-{architecture}", "debug"), // allows debug builds sideload.
+            Path.Combine(baseDirectory, "runtimes", $"{osPlatform}-{architecture}", "native"),
+        });
+
+        _window = new SDL3Window("SDL3 Testing Suite", 100, 100, 1280, 720);
+        _window.Disposing += DisposeImages;
+        _window.RenderCallback += () =>
+        {
+            if (!_init)
+            {
+                _init = true;
+                LoadImageTexture("");
+            }
+
             ImGuiViewportPtr viewport = ImGui.GetMainViewport();
             ImGui.SetNextWindowPos(viewport.WorkPos);
             ImGui.SetNextWindowSize(viewport.WorkSize);
+            ImGui.SetNextWindowViewport(viewport.ID);
 
             ImGui.Begin("MainWindow", ImGuiWindowFlags.NoBackground | ImGuiWindowFlags.MenuBar | ImGuiWindowFlags.NoDocking | ImGuiWindowFlags.NoTitleBar | ImGuiWindowFlags.NoResize | ImGuiWindowFlags.NoMove | ImGuiWindowFlags.NoCollapse | ImGuiWindowFlags.NoBringToFrontOnFocus);
-
             if (ImGui.BeginMenuBar())
             {
                 if (ImGui.BeginMenu("Stuff"))
                 {
                     if (ImGui.MenuItem("Quit"))
                     {
-                        window.ShouldClose = true;
+                        _window.ShouldClose = true;
                     }
 
                     ImGui.EndMenu();
@@ -44,86 +65,110 @@ public class Program
                 ImGui.Spacing();
                 ImGui.MenuItem("Demo Window", "", ref _demoWindowVisible);
                 ImGui.Spacing();
+                ImGui.MenuItem("ImPlot Demo Window", "", ref _imPlotDemoVisible);
+                ImGui.Spacing();
                 ImGui.MenuItem("Font Stuff", "", ref _fontStuff);
 
                 ImGui.EndMenuBar();
             }
+            string hash = "AAAA";
+            bool hasValue = true;
+            string text2 = "";
+
+            if (ImGui.InputTextWithHint($"##{hash}", hasValue ? "" : "Null", ref text2, 99999, ImGuiInputTextFlags.EnterReturnsTrue | ImGuiInputTextFlags.CtrlEnterForNewLine))
+            {
+                
+            }
+            
+            float buttonSize = ImGui.GetFrameHeight();
+
+            float avail = ImGui.GetContentRegionAvail().X;
+            float inputWidth = avail - buttonSize;
+
+            ImGui.PushItemWidth(inputWidth);
+            ImGui.SameLine(0f, 0f);
+
+            if (ImGui.Button($"X##{hash}_clear", new Vector2(buttonSize, buttonSize)))
+            {
+            }
+
+            ImGui.PopItemWidth();
+            
             
             ImGui.End();
 
             if (_fontStuff)
             {
                 ImGui.SetNextWindowSize(new Vector2(250, 500), ImGuiCond.FirstUseEver);
-                if (ImGui.Begin("FontStuff", ref _fontStuff))
+                ImGui.Begin("FontStuff", ref _fontStuff);
+
+                ImGui.ShowFontSelector("Font");
+
+                bool change = false;
+                if (ImGui.GetFont() != _font)
                 {
-                    ImGui.ShowFontSelector("Font");
+                    _font = ImGui.GetFont();
-
+                    change = true;
-                    bool change = false;
-                    if (ImGui.GetFont() != _font)
-                    {
-                        _font = ImGui.GetFont();
-                        change = true;
-                    }
-
-                    string fontName = _font.GetDebugNameS();
-                    fontName = string.IsNullOrEmpty(fontName) ? _font.FontId.ToString() : fontName;
-                    if (!_initialized || change)
-                    {
-                        if (!GlyphsByName.TryGetValue(fontName, out List<uint> glyphs))
-                        {
-                            glyphs = new List<uint>();
-
-                            ImFontPtr font = _font;
-
-                            for (uint codepoint = 0; codepoint <= 0x10FFFF; codepoint++)
-                            {
-                                if (codepoint >= 0xD800 && codepoint <= 0xDFFF)
-                                {
-                                    continue;
-                                }
-
-                                if (!font.IsGlyphInFont(codepoint)) continue;
-
-                                glyphs.Add(codepoint);
-                            }
-
-                            GlyphsByName[fontName] = glyphs;
-                            Logger.Log($"Initialized font {fontName} with {glyphs.Count} glyphs");
-                        }
-
-                        _initialized = true;
-                    }
-
-                    ImGui.PushFont(null, 24);
-
-                    if (GlyphsByName.TryGetValue(fontName, out List<uint> glyphs2))
-                    {
-                        float cursorXStart = ImGui.GetCursorPosX();
-                        float maxWidth = ImGui.GetContentRegionAvail().X;
-
-                        foreach (uint codepoint in glyphs2)
-                        {
-                            string text = char.ConvertFromUtf32((int)codepoint);
-                            float glyphWidth = ImGui.CalcTextSize(text).X;
-
-                            float cursorX = ImGui.GetCursorPosX();
-                            if (cursorX > cursorXStart && (cursorX + glyphWidth) > (cursorXStart + maxWidth))
-                            {
-                                ImGui.NewLine();
-                            }
-
-                            ImGui.TextUnformatted(text);
-
-                            ImGui.SameLine();
-                        }
-                    }
-
-                    ImGui.PopFont();
-
-                    ImGui.End();
                 }
+
+                string fontName = _font.GetDebugNameS();
+                fontName = string.IsNullOrEmpty(fontName) ? _font.FontId.ToString() : fontName;
+                if (!_fontStuffInitialized || change)
+                {
+                    if (!GlyphsByName.TryGetValue(fontName, out List<uint>? glyphs))
+                    {
+                        glyphs = new List<uint>();
+
+                        ImFontPtr font = _font;
+
+                        for (uint codepoint = 0; codepoint <= 0x10FFFF; codepoint++)
+                        {
+                            if (codepoint >= 0xD800 && codepoint <= 0xDFFF)
+                            {
+                                continue;
+                            }
+
+                            if (!font.IsGlyphInFont(codepoint)) continue;
+
+                            glyphs.Add(codepoint);
+                        }
+
+                        GlyphsByName[fontName] = glyphs;
+                        Logger.Log($"Initialized font {fontName} with {glyphs.Count} glyphs");
+                    }
+
+                    _fontStuffInitialized = true;
+                }
+
+                ImGui.PushFont(null, 24);
+
+                if (GlyphsByName.TryGetValue(fontName, out List<uint>? glyphs2))
+                {
+                    float cursorXStart = ImGui.GetCursorPosX();
+                    float maxWidth = ImGui.GetContentRegionAvail().X;
+
+                    foreach (uint codepoint in glyphs2!)
+                    {
+                        string text = char.ConvertFromUtf32((int)codepoint);
+                        float glyphWidth = ImGui.CalcTextSize(text).X;
+
+                        float cursorX = ImGui.GetCursorPosX();
+                        if (cursorX > cursorXStart && (cursorX + glyphWidth) > (cursorXStart + maxWidth))
+                        {
+                            ImGui.NewLine();
+                        }
+
+                        ImGui.TextUnformatted(text);
+
+                        ImGui.SameLine();
+                    }
+                }
+
+                ImGui.PopFont();
+                ImGui.End();
             }
 
+            ImGui.Begin("Thing");
             float time = (float)ImGui.GetTime() * 5;
             if (ImPlot.BeginPlot("Moving Rainbow Sine Wave"))
             {
@@ -161,29 +206,118 @@ public class Program
 
                 ImPlot.EndPlot();
             }
-            
             ImGui.SliderFloat("Sine", ref size, 1f, 120f);
+            ImGui.End();
+
+            bool regen1 = true;
+
+            if (_imageTexture != null)
+            {
+                Vector2 displaySize = ImGui.GetIO().DisplaySize;
+                Vector2 imageSize = new Vector2(_imageTexture.Width, _imageTexture.Height);
+
+                float maxWidth = displaySize.X * 0.5f;
+                float maxHeight = displaySize.Y * 0.5f;
+                float scale = MathF.Min(maxWidth / imageSize.X, maxHeight / imageSize.Y);
+
+                Vector2 scaledSize = imageSize * MathF.Min(scale, 1.0f);
+                Vector2 padding = ImGui.GetStyle().WindowPadding;
+                Vector2 windowSize = new Vector2(scaledSize.X + padding.X * 2, scaledSize.Y + padding.Y * 2 + (ImGui.GetFrameHeight() * 4));
+
+                ImGui.SetNextWindowSize(windowSize, ImGuiCond.Always);
+                ImGui.Begin(_imageTexture.FileName ?? "Image", ref regen1, ImGuiWindowFlags.NoResize | ImGuiWindowFlags.NoScrollbar | ImGuiWindowFlags.NoSavedSettings);
+
+                regen1 = !ImGui.Button("Regen");
+
+                ImGui.Image(_imageTexture.ImGuiTexture, scaledSize);
+
+                string text1 = $"{_imageTexture.Width}x{_imageTexture.Height}";
+                ImGui.TextUnformatted(text1);
+                ImGui.SameLine(ImGui.CalcTextSize(text1).X + padding.X * 2);
+                ImGui.TextUnformatted($"EXT: {(_imageTexture.Extension ?? "Unknown Format")}");
+                ImGui.TextUnformatted($"{(_imageTexture.FilePath ?? "Unknown Path")}");
+            }
+            else
+            {
+                ImGui.Begin("Image", ref regen1, ImGuiWindowFlags.NoResize | ImGuiWindowFlags.NoScrollbar | ImGuiWindowFlags.NoSavedSettings);
+
+                ImGui.TextUnformatted(_imageLoadError ?? "No image loaded.");
+            }
+            ImGui.End();
+            bool regen = !regen1;
+            if (regen)
+            {
+                DisposeImages();
+                LoadImageTexture("");
+            }
 
             if (_demoWindowVisible)
             {
                 ImGui.ShowDemoWindow(ref _demoWindowVisible);
-                ImPlot.ShowDemoWindow(ref _demoWindowVisible);
+            }
-                // ImPlot3D.ShowDemoWindow(ref _demoWindowVisible);
+            if (_imPlotDemoVisible)
+            {
+                ImPlot.ShowDemoWindow(ref _imPlotDemoVisible);
             }
         };
 
-        window.Run();
+        _window.Run();
+    }
+
+    private static void LoadImageTexture(string path)
+    {
+        if (string.IsNullOrEmpty(path)) return;
+
+        try
+        {
+            _imageTexture = OpenGLTexture.FromFile(_window.GL, path);
+            _imageLoadError = null;
+        }
+        catch (Exception e)
+        {
+            DisposeImages();
+            _imageLoadError = e.Message;
+            Logger.Log(e);
+        }
+    }
+
+    private static void DisposeImages()
+    {
+        _imageTexture?.Dispose();
+        _imageTexture = null;
     }
 
     public static class Logger
     {
-        public static void Log(string? str, [CallerMemberName] string caller = "", [CallerLineNumber] int line = 0)
+        private const int MessageWidth = 80;
+        private const int CallerWidth = 35;
+
+        public static void Log(object? value, [CallerFilePath] string path = "", [CallerMemberName] string caller = "", [CallerLineNumber] int line = 0)
         {
-            Console.WriteLine($"{caller}({line}): {str}");
+            if (value == null)
+            {
+                Write("null", path, caller, line);
+                return;
+            }
+            Write(value.ToString(), path, caller, line);
         }
-        public static void Log(object? str, [CallerMemberName] string caller = "", [CallerLineNumber] int line = 0)
+
+        public static void Log(object?[] values, [CallerFilePath] string path = "", [CallerMemberName] string caller = "", [CallerLineNumber] int line = 0)
         {
-            Log(str?.ToString(), caller, line);
+            if (values == null)
+            {
+                Write("null", path, caller, line);
+                return;
+            }
+            Write(string.Join(" ", values), path, caller, line);
+        }
+
+        private static void Write(string? str, string path, string caller, int line)
+        {
+            string message = (str ?? string.Empty).PadRight(MessageWidth);
+            string method = caller.PadRight(CallerWidth);
+
+            Console.WriteLine($"{message} | {method} | {path}:{line}");
         }
     }
 }

SDL3 TestingSuite.csproj

@@ -14,11 +14,15 @@
         <!--<PackageReference Include="ImGui.NET" Version="*" />-->
         <PackageReference Include="Hexa.NET.ImGui" Version="2.2.9" />
         <PackageReference Include="Hexa.NET.ImGui.Widgets" Version="1.2.18" />
+        <PackageReference Include="Hexa.NET.ImNodes" Version="2.2.9" />
         <PackageReference Include="Hexa.NET.ImPlot" Version="2.2.9" />
         <PackageReference Include="Hexa.NET.ImPlot3D" Version="2.2.9" />
+        <PackageReference Include="Hexa.NET.OpenGL4" Version="1.1.0" />
+        <PackageReference Include="Hexa.NET.SDL3.Image" Version="1.0.0" />
         <PackageReference Include="Hexa.NET.Utilities" Version="2.2.12" />
         <PackageReference Include="SDL3-CS" Version="3.2.18" />
         <PackageReference Include="SDL3-CS.Native" Version="3.2.18" />
+        <PackageReference Include="SDL3-CS.Native.Image" Version="3.3.0" />
     </ItemGroup>
 
 </Project>

SDL3/DelegateHelpers.cs

@@ -0,0 +1,8 @@
+using System.Runtime.InteropServices;
+
+namespace SDL3_TestingSuite.SDL3;
+
+public unsafe static class DelegateHelpers
+{
+    public static void* GetPtrForDelegate<TDelegate>(this TDelegate _delegate) where TDelegate : notnull => (void*)Marshal.GetFunctionPointerForDelegate(_delegate);
+}

SDL3/FontFind.cs

@@ -21,7 +21,7 @@ public static class FontFind
 {
     extension(ImGuiIOPtr io)
     {
-        public unsafe ImFontPtr AddFont(string fontPath)
+        public unsafe ImFontPtr AddFont(string fontPath, bool merge = false)
         {
             try
             {
@@ -29,13 +29,14 @@ public static class FontFind
                 FileInfo info = new FileInfo(fontPath);
                 if (!info.Exists || info.Length <= 0) return null;
 
-                FontMetrics metrics = FontFind.ReadFontMetrics(fontPath);
+                FontMetrics metrics = ReadFontMetricsSafe(fontPath);
-                float size = FontFind.GetRecommendedPixelSize(metrics);
+                float size = GetRecommendedPixelSize(metrics);
 
                 ImFontConfigPtr config = ImGui.ImFontConfig();
-                config.FontLoaderFlags |= (uint)ImGuiFreeTypeLoaderFlags.LoadColor;
+                config.FontLoaderFlags |= (uint)ImGuiFreeTypeLoaderFlags.LoadColor | (uint)ImGuiFreeTypeLoaderFlags.Bitmap;
+                config.MergeMode = merge;
                 ImFontPtr font = io.Fonts.AddFontFromFileTTF(fontPath, size, config);
-                Program.Logger.Log("Added font: " + Path.GetFileName(fontPath));
+                Program.Logger.Log($"{(merge ? "Merged" : "Added")} font: " + Path.GetFileName(fontPath));
                 return font;
             }
             catch (Exception e)
@@ -72,6 +73,21 @@ public static class FontFind
         }
     }
     
+    public static FontMetrics ReadFontMetricsSafe(string fontPath)
+    {
+        try
+        {
+            return ReadFontMetrics(fontPath);
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine("Font parsing failed: " + fontPath);
+            Console.WriteLine(ex.ToString());
+
+            return new FontMetrics();
+        }
+    }
+
     public static FontMetrics ReadFontMetrics(string fontPath)
     {
         byte[] data = File.ReadAllBytes(fontPath);
@@ -110,11 +126,9 @@ public static class FontFind
             metrics.WinDescent = ReadS16Be(os2Offset + 76);
         }
 
-        metrics.TypoLineHeight =
+        metrics.TypoLineHeight = metrics.TypoAscender - metrics.TypoDescender + metrics.TypoLineGap;
-            metrics.TypoAscender - metrics.TypoDescender + metrics.TypoLineGap;
 
-        metrics.WinLineHeight =
+        metrics.WinLineHeight = metrics.WinAscent + metrics.WinDescent;
-            metrics.WinAscent + metrics.WinDescent;
 
         return metrics;
 

SDL3/ImGuiUserData.cs

@@ -0,0 +1,35 @@
+using System.Runtime.InteropServices;
+
+namespace SDL3_TestingSuite.SDL3;
+
+public unsafe static class ImGuiUserData<T> where T : class
+{
+    public static void* Store(T value)
+    {
+        if (value == null)
+            return null;
+
+        GCHandle handle = GCHandle.Alloc(value, GCHandleType.Normal);
+        return (void*)GCHandle.ToIntPtr(handle);
+    }
+
+    public static T? Get(void* ptr)
+    {
+        if (ptr == null)
+            return null;
+
+        GCHandle handle = GCHandle.FromIntPtr((nint)ptr);
+        return (T?)handle.Target;
+    }
+
+    public static void Free(void* ptr)
+    {
+        if (ptr == null)
+            return;
+
+        GCHandle handle = GCHandle.FromIntPtr((nint)ptr);
+
+        if (handle.IsAllocated)
+            handle.Free();
+    }
+}

SDL3/OpenGLTexture.cs

@@ -0,0 +1,182 @@
+using System.Numerics;
+using Hexa.NET.ImGui;
+using Hexa.NET.OpenGL;
+using SDL3;
+
+namespace SDL3_TestingSuite.SDL3;
+
+public sealed unsafe class OpenGLTexture : IDisposable
+{
+    private readonly GL _gl;
+
+    public uint Handle { get; private set; }
+    public int Width { get; }
+    public int Height { get; }
+
+    public ImTextureRef ImGuiTexture => new ImTextureRef(null, (nint)Handle);
+    public Vector2 Size => new Vector2(Width, Height);
+
+    public string? FileName;
+    public string? FilePath;
+    public string? Extension;
+
+    private OpenGLTexture(GL gl, uint handle, int width, int height, string? path = null)
+    {
+        _gl = gl;
+        Handle = handle;
+        Width = width;
+        Height = height;
+        
+        if (path == null) return;
+        FileName = Path.GetFileName(path);
+        FilePath = path;
+        Extension = Path.GetExtension(path);
+    }
+
+    public static OpenGLTexture FromFile(GL gl, string path)
+    {
+        nint surface = string.Equals(Path.GetExtension(path), ".bmp", StringComparison.OrdinalIgnoreCase)
+            ? SDL.LoadBMP(path)
+            : Image.Load(path);
+
+        if (surface == nint.Zero)
+        {
+            throw new InvalidOperationException($"Failed to load image '{path}': {SDL.GetError()}");
+        }
+
+        try
+        {
+            return FromSurface(gl, surface, path);
+        }
+        finally
+        {
+            SDL.DestroySurface(surface);
+        }
+    }
+
+    public static OpenGLTexture FromSurface(GL gl, nint surface, string? path = null)
+    {
+        if (surface == nint.Zero)
+        {
+            throw new ArgumentException("Surface cannot be null.", nameof(surface));
+        }
+
+        SDL.PixelFormat uploadFormat = BitConverter.IsLittleEndian
+            ? SDL.PixelFormat.ABGR8888
+            : SDL.PixelFormat.RGBA8888;
+
+        nint converted = SDL.ConvertSurface(surface, uploadFormat);
+        if (converted == nint.Zero)
+        {
+            throw new InvalidOperationException($"Failed to convert image surface to RGBA32: {SDL.GetError()}");
+        }
+
+        try
+        {
+            SDL.Surface* convertedSurface = (SDL.Surface*)converted;
+            bool locked = false;
+
+            if (SDL.MustLock(*convertedSurface))
+            {
+                if (!SDL.LockSurface(converted))
+                {
+                    throw new InvalidOperationException($"Failed to lock image surface: {SDL.GetError()}");
+                }
+
+                locked = true;
+            }
+
+            try
+            {
+                uint texture = UploadRgba32(gl, convertedSurface);
+                return new OpenGLTexture(gl, texture, convertedSurface->Width, convertedSurface->Height, path);
+            }
+            finally
+            {
+                if (locked)
+                {
+                    SDL.UnlockSurface(converted);
+                }
+            }
+        }
+        finally
+        {
+            SDL.DestroySurface(converted);
+        }
+    }
+
+    private static uint UploadRgba32(GL gl, SDL.Surface* surface)
+    {
+        uint texture = 0;
+        gl.GenTextures(1, ref texture);
+
+        gl.GetIntegerv(GLGetPName.TextureBinding2D, out int previousTexture);
+        gl.BindTexture(GLTextureTarget.Texture2D, texture);
+
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.MinFilter, (int)GLTextureMinFilter.Linear);
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.MagFilter, (int)GLTextureMagFilter.Linear);
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.WrapS, (int)GLEnum.ClampToEdge);
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.WrapT, (int)GLEnum.ClampToEdge);
+
+        gl.PixelStorei(GLPixelStoreParameter.UnpackAlignment, 1);
+        gl.PixelStorei(GLPixelStoreParameter.UnpackRowLength, surface->Pitch / 4);
+        gl.TexImage2D(
+            GLTextureTarget.Texture2D,
+            0,
+            GLInternalFormat.Rgba,
+            surface->Width,
+            surface->Height,
+            0,
+            GLPixelFormat.Rgba,
+            GLPixelType.UnsignedByte,
+            surface->Pixels);
+        gl.PixelStorei(GLPixelStoreParameter.UnpackRowLength, 0);
+
+        gl.BindTexture(GLTextureTarget.Texture2D, (uint)previousTexture);
+        return texture;
+    }
+
+    private static uint UploadRgba32FromPixels(GL gl, byte[] pixels, int width, int height)
+    {
+        uint texture = 0;
+        gl.GenTextures(1, ref texture);
+
+        gl.GetIntegerv(GLGetPName.TextureBinding2D, out int previousTexture);
+        gl.BindTexture(GLTextureTarget.Texture2D, texture);
+
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.MinFilter, (int)GLTextureMinFilter.Linear);
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.MagFilter, (int)GLTextureMagFilter.Linear);
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.WrapS, (int)GLEnum.ClampToEdge);
+        gl.TexParameteri(GLTextureTarget.Texture2D, GLTextureParameterName.WrapT, (int)GLEnum.ClampToEdge);
+
+        gl.PixelStorei(GLPixelStoreParameter.UnpackAlignment, 1);
+
+        fixed (byte* ptr = &pixels[0])
+        {
+            gl.TexImage2D(
+                GLTextureTarget.Texture2D,
+                0,
+                GLInternalFormat.Rgba,
+                width,
+                height,
+                0,
+                GLPixelFormat.Rgba,
+                GLPixelType.UnsignedByte,
+                (nint)ptr);
+        }
+
+        gl.BindTexture(GLTextureTarget.Texture2D, (uint)previousTexture);
+        return texture;
+    }
+
+    public void Dispose()
+    {
+        if (Handle == 0)
+        {
+            return;
+        }
+
+        _gl.DeleteTexture(Handle);
+        Handle = 0;
+    }
+}

SDL3/SDL3Window.cs

@@ -1,12 +1,10 @@
-using System;
+using System.Numerics;
-using System.Diagnostics;
-using System.Numerics;
-using System.Runtime.InteropServices;
 using Hexa.NET.ImGui;
-using Hexa.NET.ImGui.Utilities;
 using Hexa.NET.ImGuizmo;
 using Hexa.NET.ImPlot;
-using Hexa.NET.ImPlot3D;
+using Hexa.NET.ImNodes;
+using Hexa.NET.OpenGL;
+using HexaGen.Runtime;
 using SDL3;
 
 namespace SDL3_TestingSuite.SDL3;
@@ -14,49 +12,82 @@ namespace SDL3_TestingSuite.SDL3;
 public sealed unsafe class SDL3Window : IDisposable
 {
     public readonly nint Window;
-    public readonly nint Renderer;
 
-    internal Action? RenderCallback { get; set; }
+    public readonly Vector4 DefaultClearColor = new Vector4(0.06f, 0.06f, 0.06f, 1f);
 
-    public Vector4 ClearColor = new Vector4(0.06f, 0.05882353f, 0.05882353f, 1f);
+    private Vector4? _clearColor;
+    public Vector4 ClearColor
+    {
+        get => _clearColor ?? DefaultClearColor;
+        set => _clearColor = value;
+    }
 
-    private readonly Stopwatch _timer = Stopwatch.StartNew();
+    public event Action? RenderCallback;
-    private TimeSpan _time = TimeSpan.Zero;
+    public event Action? Disposing;
+    public event Action<Vector4>? Resized;
+    public event Action<SDL.Event>? EventCallback;
 
-    private SDL.Rect _screenClipRect;
     private ImGuiContextPtr _imGuiContext;
+    private ImPlotContextPtr _imPlotContext;
+    private ImNodesContextPtr _imNodesContext;
+    // private ImPLot3DContextPtr _imPlot3DContext;
     
     public bool Disposed => _disposed;
     private bool _disposed;
 
-    private FileSystemWatcher? _watcher;
+    private readonly FileSystemWatcher? _watcher;
+
+    public readonly GL GL;
 
     public SDL3Window(string name, int posX, int posY, int width, int height, SDL.WindowFlags flags = SDL.WindowFlags.Resizable | SDL.WindowFlags.HighPixelDensity)
     {
+        if (OperatingSystem.IsLinux())
+            SDL.SetHint(SDL.Hints.VideoDriver, "x11");
+
         if (!SDL.Init(SDL.InitFlags.Events | SDL.InitFlags.Video | SDL.InitFlags.Gamepad))
             throw new Exception($"SDL_Init failed: {SDL.GetError()}");
 
+        SDL.GLSetAttribute(SDL.GLAttr.ContextFlags, (int)SDL.GLContextFlag.ForwardCompatible);
+        SDL.GLSetAttribute(SDL.GLAttr.ContextProfileMask, (int)SDL.GLProfile.Core);
+        SDL.GLSetAttribute(SDL.GLAttr.ContextMajorVersion, 4);
+        SDL.GLSetAttribute(SDL.GLAttr.ContextMinorVersion, 6);
+
+        SDL.SetHint(SDL.Hints.IMEImplementedUI, "1");
+
         // Create window & renderer
-        if (!SDL.CreateWindowAndRenderer(name, width, height, flags, out Window, out Renderer))
+        SDL.GLSetAttribute(SDL.GLAttr.DoubleBuffer, 1);
+        SDL.GLSetAttribute(SDL.GLAttr.DepthSize, 24);
+        SDL.GLSetAttribute(SDL.GLAttr.StencilSize, 8);
+        Window = SDL.CreateWindow(name, width, height, flags | SDL.WindowFlags.OpenGL);
+        if (Window == nint.Zero)
             throw new Exception($"SDL_CreateWindowAndRenderer failed: {SDL.GetError()}");
 
+        nint glContext = SDL.GLCreateContext(Window);
+        if (glContext == nint.Zero)
+            throw new Exception($"SDL_GL_CreateContext failed: {SDL.GetError()}");
+
+        SDL.GLMakeCurrent(Window, glContext);
+        SDL.GLSetSwapInterval(1);
+
         SDL.SetWindowPosition(Window, posX, posY);
-        SDL.SetRenderVSync(Renderer, 1);
+        // SDL.SetRenderVSync(Renderer, 1);
         SDL.ShowWindow(Window);
 
         // Create ImGui context
-        var context = ImGui.CreateContext();
+        _imGuiContext = ImGui.CreateContext();
-        ImPlot.CreateContext();
+        _imPlotContext = ImPlot.CreateContext();
-        ImPlot.SetImGuiContext(context);
+        _imNodesContext = ImNodes.CreateContext();
-        ImGuizmo.SetImGuiContext(context);
+        // _imPlot3DContext = ImPlot3D.CreateContext();
-        // ImPlot3D.SetImGuiContext(context);
+        ImPlot.SetImGuiContext(_imGuiContext);
-        // ImPlot3D.CreateContext();
+        ImGuizmo.SetImGuiContext(_imGuiContext);
+        ImNodes.SetImGuiContext(_imGuiContext);
+        // ImPlot3D.SetImGuiContext(_imGuiContext);
         
         ImGuiIOPtr io = ImGui.GetIO();
         io.ConfigFlags |= ImGuiConfigFlags.NavEnableKeyboard | ImGuiConfigFlags.NavEnableGamepad | ImGuiConfigFlags.DockingEnable;
-        // io.ConfigFlags |= ImGuiConfigFlags.ViewportsEnable;
+        io.ConfigFlags |= ImGuiConfigFlags.ViewportsEnable;
-        io.Fonts.Flags |= ImFontAtlasFlags.NoBakedLines;
 
+        io.Fonts.Flags |= ImFontAtlasFlags.NoBakedLines;
         io.Fonts.AddFontDefault();
 
         try
@@ -66,28 +97,57 @@ public sealed unsafe class SDL3Window : IDisposable
 
             _watcher = new FileSystemWatcher(fontsPath);
             _watcher.NotifyFilter = NotifyFilters.FileName | NotifyFilters.CreationTime;
-            _watcher.Created += (a, b) =>
+            _watcher.Created += (_, b) =>
             {
                 if (!File.Exists(b.FullPath)) return;
 
                 if (Path.GetExtension(b.FullPath) != ".ttf") return;
-
                 ImGui.GetIO().AddFont(b.FullPath);
             };
-            _watcher.Deleted += (a, b) =>
+            _watcher.Deleted += (_, b) =>
             {
                 if (Path.GetExtension(b.FullPath) != ".ttf") return;
-
                 ImGui.GetIO().RemoveFont(b.Name);
             };
+            _watcher.Renamed += (_, b) =>
+            {
+                if (Path.GetExtension(b.OldFullPath) != ".ttf") return;
+                ImGui.GetIO().RemoveFont(b.OldName);
+
+                if (!File.Exists(b.FullPath)) return;
+                if (Path.GetExtension(b.FullPath) != ".ttf") return;
+                ImGui.GetIO().AddFont(b.FullPath);
+            };
 
             _watcher.IncludeSubdirectories = false;
             _watcher.EnableRaisingEvents = true;
 
-            string[] fonts = Directory.GetFiles(fontsPath, "*.ttf", SearchOption.AllDirectories);
+            List<string> fonts = Directory.GetFiles(fontsPath, "*.ttf", SearchOption.AllDirectories).ToList();
+            fonts.Sort();
+
+            List<string> mergeFonts = new List<string>();
+            for (int i = fonts.Count - 1; i >= 0; i--)
+            {
+                if (Path.GetFileName(fonts[i]).StartsWith("merge_", StringComparison.OrdinalIgnoreCase))
+                {
+                    mergeFonts.Add(fonts[i]);
+                    fonts.RemoveAt(i);
+                }
+            }
+            mergeFonts.Reverse();
+            
+            foreach (string merge in mergeFonts)
+            {
+                io.AddFont(merge, true);
+            }
+
             foreach (string font in fonts)
             {
                 io.AddFont(font);
+                foreach (string merge in mergeFonts)
+                {
+                    io.AddFont(merge, true);
+                }
             }
         }
         catch (Exception e)
@@ -95,25 +155,75 @@ public sealed unsafe class SDL3Window : IDisposable
             Console.WriteLine(e);
         }
         
+        GL = new GL(new BindingsContext(Window, glContext));
+
         // Init platform and renderer
-        ImGuiSDL3Platform.Init(Window, Renderer);
+        ImGuiSDL3Platform.Init(GL, Window, glContext);
-        ImGuiSDL3Renderer.Init(Renderer);
+        ImGuiSDL3Renderer.Init(GL, "#version 330");
     }
 
+    public bool ShouldClose;
+
     public void Run()
     {
         while (!_disposed)
         {
-            ImGui.GetIO().DeltaTime = (float)(_timer.Elapsed - _time).TotalSeconds;
+            SDL.PumpEvents();
-            _time = _timer.Elapsed;
 
-            PollEvents();
+            while (SDL.PollEvent(out SDL.Event ev))
+            {
+                ImGuiSDL3Platform.ProcessEvent(ev);
 
-            Update();
+                switch ((SDL.EventType)ev.Type)
+                {
+                    case SDL.EventType.Terminating:
+                    case SDL.EventType.WindowCloseRequested:
+                    case SDL.EventType.Quit:
+                        ShouldClose = true;
+                        break;
+                    case SDL.EventType.WindowResized:
+                    case SDL.EventType.WindowMoved:
+                        SDL.GetWindowSize(Window, out int w, out int h);
+                        SDL.GetWindowPosition(Window, out int x, out int y);
+                        Resized?.Invoke(new Vector4(x, y, w, h));
+                        break;
+                }
+                
+                EventCallback?.Invoke(ev);
+            }
+
+            if (SDL.GetWindowFlags(Window).HasFlag(SDL.WindowFlags.Minimized))
+            {
+                SDL.Delay(10);
+                continue;
+            }
+            
+            GL.MakeCurrent();
+            GL.ClearColor(ClearColor.X, ClearColor.Y, ClearColor.Z, ClearColor.W);
+            GL.Clear(GLClearBufferMask.ColorBufferBit);
+
+            ImGuiSDL3Platform.NewFrame();
+            ImGuiSDL3Renderer.NewFrame();
+            ImGui.NewFrame();
 
             RenderCallback?.Invoke();
 
-            Render();
+            ImGuiIOPtr io = ImGui.GetIO();
+
+            ImGui.Render();
+
+            GL.MakeCurrent();
+
+            ImGuiSDL3Renderer.RenderDrawData(ImGui.GetDrawData());
+
+            if ((io.ConfigFlags & ImGuiConfigFlags.ViewportsEnable) != 0)
+            {
+                ImGui.UpdatePlatformWindows();
+                ImGui.RenderPlatformWindowsDefault();
+            }
+            
+            GL.MakeCurrent();
+            GL.SwapBuffers();
 
             if (ShouldClose)
             {
@@ -126,56 +236,6 @@ public sealed unsafe class SDL3Window : IDisposable
             Dispose();
     }
 
-    public bool ShouldClose;
-
-    private void PollEvents()
-    {
-        if (ImGui.GetIO().WantTextInput && !SDL.TextInputActive(Window))
-            SDL.StartTextInput(Window);
-        else if (!ImGui.GetIO().WantTextInput && SDL.TextInputActive(Window))
-            SDL.StopTextInput(Window);
-
-        while (SDL.PollEvent(out SDL.Event ev))
-        {
-            ImGuiSDL3Platform.ProcessEvent(ev);
-
-            switch ((SDL.EventType)ev.Type)
-            {
-                case SDL.EventType.Terminating:
-                case SDL.EventType.WindowCloseRequested:
-                case SDL.EventType.Quit:
-                    ShouldClose = true;
-                    break;
-            }
-        }
-    }
-
-    private void Update()
-    {
-        ImGuiSDL3Platform.NewFrame();
-        ImGuiSDL3Renderer.NewFrame();
-        ImGui.NewFrame();
-    }
-
-    private void Render()
-    {
-        ImGuiIOPtr io = ImGui.GetIO();
-
-        ImGui.Render();
-        SDL.SetRenderScale(Renderer, io.DisplayFramebufferScale.X, io.DisplayFramebufferScale.Y);
-        SDL.SetRenderDrawColorFloat(Renderer, ClearColor.X, ClearColor.Y, ClearColor.Z, ClearColor.W);
-        SDL.RenderClear(Renderer);
-        ImGuiSDL3Renderer.RenderDrawData(ImGui.GetDrawData(), Renderer);
-
-        if ((io.ConfigFlags & ImGuiConfigFlags.ViewportsEnable) != 0)
-        {
-            ImGui.UpdatePlatformWindows();
-            ImGui.RenderPlatformWindowsDefault();
-        }
-
-        SDL.RenderPresent(Renderer);
-    }
-
     ~SDL3Window()
     {
         Dispose(false);
@@ -194,10 +254,22 @@ public sealed unsafe class SDL3Window : IDisposable
 
         if (disposing)
         {
+            if (_imGuiContext.Handle != null)
+            {
+                ImGui.SetCurrentContext(_imGuiContext);
+            }
+            if (_imPlotContext.Handle != null)
+            {
+                ImPlot.SetCurrentContext(_imPlotContext);
+            }
+
+            Disposing?.Invoke();
+
             ImGuiSDL3Renderer.Dispose();
             ImGuiSDL3Platform.Dispose();
 
             RenderCallback = null;
+            Disposing = null;
         }
 
         if (_imGuiContext.Handle != null)
@@ -206,11 +278,29 @@ public sealed unsafe class SDL3Window : IDisposable
             ImGui.DestroyContext(_imGuiContext);
             _imGuiContext = null;
         }
-
+        if (_imPlotContext.Handle != null)
-        if (Renderer != nint.Zero)
         {
-            SDL.DestroyRenderer(Renderer);
+            ImPlot.SetCurrentContext(null);
+            ImPlot.DestroyContext(_imPlotContext);
+            _imPlotContext = null;
         }
+        if (_imNodesContext.Handle != null)
+        {
+            ImNodes.SetCurrentContext(null);
+            ImNodes.DestroyContext(_imNodesContext);
+            _imNodesContext = null;
+        }
+        // if (_imPlot3DContext.Handle != null)
+        // {
+        //     ImPlot3D.SetCurrentContext(null);
+        //     ImPlot3D.DestroyContext(_imPlot3DContext);
+        //     _imPlot3DContext = null;
+        // }
+
+        // if (Renderer != nint.Zero)
+        // {
+        //     SDL.DestroyRenderer(Renderer);
+        // }
 
         if (Window != nint.Zero)
         {
@@ -219,3 +309,52 @@ public sealed unsafe class SDL3Window : IDisposable
     }
 
 }
+
+public unsafe class BindingsContext : IGLContext
+{
+    private readonly nint window;
+    private readonly nint context;
+
+    public BindingsContext(nint window, nint context)
+    {
+        this.window = window;
+        this.context = context;
+    }
+
+    public nint Handle => window;
+
+    public bool IsCurrent => SDL.GLGetCurrentContext() == context;
+
+    public void Dispose() { }
+
+    public nint GetProcAddress(string procName)
+    {
+        return (nint)SDL.GLGetProcAddress(procName).GetPtrForDelegate();
+    }
+
+    public bool IsExtensionSupported(string extensionName)
+    {
+        return SDL.GLExtensionSupported(extensionName);
+    }
+
+    public void MakeCurrent()
+    {
+        SDL.GLMakeCurrent(window, context);
+    }
+
+    public void SwapBuffers()
+    {
+        SDL.GLSwapWindow(window);
+    }
+
+    public void SwapInterval(int interval)
+    {
+        SDL.GLSetSwapInterval(interval);
+    }
+
+    public bool TryGetProcAddress(string procName, out nint procAddress)
+    {
+        procAddress = (nint)SDL.GLGetProcAddress(procName).GetPtrForDelegate();
+        return procAddress != 0;
+    }
+}