some linux work from summer

# Conflicts:
#	Source/Editor/Windows/SceneTreeWindow.cs

.github/workflows/build_linux.yml

@@ -16,7 +16,7 @@ jobs:
       uses: actions/checkout@v3
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET
@@ -44,7 +44,7 @@ jobs:
       uses: actions/checkout@v3
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev
+        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET

.github/workflows/tests.yml

@@ -28,7 +28,7 @@ jobs:
         git lfs pull
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Build
       run: |
         ./GenerateProjectFiles.sh -vs2022 -log -verbose -printSDKs -dotnet=8

Content/Editor/MaterialTemplates/Features/ForwardShading.hlsl

@@ -28,6 +28,13 @@ TextureCube SkyLightTexture : register(t__SRV__);
 Buffer<float4> ShadowsBuffer : register(t__SRV__);
 Texture2D<float> ShadowMap : register(t__SRV__);
 @4// Forward Shading: Utilities
+// Public accessors for lighting data, use them as data binding might change but those methods will remain.
+LightData GetDirectionalLight() { return DirectionalLight; }
+LightData GetSkyLight() { return SkyLight; }
+ProbeData GetEnvironmentProbe() { return EnvironmentProbe; }
+ExponentialHeightFogData GetExponentialHeightFog() { return ExponentialHeightFog; }
+uint GetLocalLightsCount() { return LocalLightsCount; }
+LightData GetLocalLight(uint i) { return LocalLights[i]; }
 @5// Forward Shading: Shaders
 
 // Pixel Shader function for Forward Pass
@@ -76,9 +83,8 @@ void PS_Forward(
 	gBuffer.ShadingModel = MATERIAL_SHADING_MODEL;
 
 	// Calculate lighting from a single directional light
-	float4 shadowMask = 1.0f;
 	ShadowSample shadow = SampleDirectionalLightShadow(DirectionalLight, ShadowsBuffer, ShadowMap, gBuffer);
-	shadowMask = GetShadowMask(shadow);
+	float4 shadowMask = GetShadowMask(shadow);
 	float4 light = GetLighting(ViewPos, DirectionalLight, gBuffer, shadowMask, false, false);
 
 	// Calculate lighting from sky light

Flax.flaxproj

@@ -2,9 +2,9 @@
   "Name": "Flax",
   "Version": {
     "Major": 1,
-    "Minor": 10,
+    "Minor": 11,
     "Revision": 0,
-    "Build": 6705
+    "Build": 6800
   },
   "Company": "Flax",
   "Copyright": "Copyright (c) 2012-2025 Wojciech Figat. All rights reserved.",
@@ -13,6 +13,7 @@
   "Configuration": {
     "UseCSharp": true,
     "UseLargeWorlds": false,
-    "UseDotNet": true
+    "UseDotNet": true,
+    "UseSDL": true
   }
 }

GenerateProjectFiles.sh

@@ -14,4 +14,4 @@ bash ./Development/Scripts/Linux/CallBuildTool.sh --genproject "$@"
 # Build bindings for all editor configurations
 echo Building C# bindings...
 # TODO: Detect the correct architecture here
-Binaries/Tools/Flax.Build -build -BuildBindingsOnly -arch=x64 -platform=Linux --buildTargets=FlaxEditor
+#Binaries/Tools/Flax.Build -build -BuildBindingsOnly -arch=x64 -platform=Linux --buildTargets=FlaxEditor

README.md

@@ -57,9 +57,9 @@ Follow the instructions below to compile and run the engine from source.
   * Arch: `sudo pacman -S git git-lfs`
   * `git-lfs install`
 * Install the required packages:
-  * Ubuntu: `sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev zlib1g-dev`
-  * Fedora: `sudo dnf install libX11-devel libXcursor-devel  libXinerama-devel ghc-zlib-devel`
-  * Arch: `sudo pacman -S base-devel libx11 libxcursor libxinerama zlib`
+  * Ubuntu: `sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev zlib1g-dev zenity wayland-protocols libportal-dev`
+  * Fedora: `sudo dnf install libX11-devel libXcursor-devel  libXinerama-devel ghc-zlib-devel zenity wayland-protocols-devel libportal`
+  * Arch: `sudo pacman -S base-devel libx11 libxcursor libxinerama zlib zenity wayland-protocols libportal`
 * Install Clang compiler (version 6 or later):
   * Ubuntu: `sudo apt-get install clang lldb lld`
   * Fedora: `sudo dnf install clang llvm lldb lld`

Source/Editor/Analytics/EditorAnalytics.cpp

@@ -174,7 +174,9 @@ void EditorAnalytics::StartSession()
     // Bind events
     GameCooker::OnEvent.Bind<RegisterGameCookingStart>();
     ShadowsOfMordor::Builder::Instance()->OnBuildStarted.Bind<RegisterLightmapsBuildingStart>();
+#if LOG_ENABLE
     Log::Logger::OnError.Bind<RegisterError>();
+#endif
 }
 
 void EditorAnalytics::EndSession()
@@ -187,7 +189,9 @@ void EditorAnalytics::EndSession()
     // Unbind events
     GameCooker::OnEvent.Unbind<RegisterGameCookingStart>();
     ShadowsOfMordor::Builder::Instance()->OnBuildStarted.Unbind<RegisterLightmapsBuildingStart>();
+#if LOG_ENABLE
     Log::Logger::OnError.Unbind<RegisterError>();
+#endif
 
     // End session
     {

Source/Editor/Content/Items/ContentFolder.cs

@@ -282,7 +282,7 @@ namespace FlaxEditor.Content
 
             if (data is DragDataFiles)
                 return DragDropEffect.Copy;
-            return _dragOverItems.Effect;
+            return _dragOverItems?.Effect ?? DragDropEffect.None;
         }
 
         /// <inheritdoc />

Source/Editor/Content/Items/CppScriptItem.cs

@@ -20,7 +20,7 @@ namespace FlaxEditor.Content
         }
 
         /// <inheritdoc />
-        public override string TypeDescription => Path.EndsWith(".h") ? "C++ Header File" : "C++ Source Code";
+        public override string TypeDescription => Path.EndsWith(".h") || Path.EndsWith(".hpp") ? "C++ Header File" : "C++ Source Code";
 
         /// <inheritdoc />
         public override SpriteHandle DefaultThumbnail => Editor.Instance.Icons.CPPScript128;

Source/Editor/Cooker/GameCooker.cpp

@@ -30,6 +30,7 @@
 #include "Engine/Scripting/ManagedCLR/MAssembly.h"
 #include "Engine/Content/JsonAsset.h"
 #include "Engine/Content/AssetReference.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #if PLATFORM_TOOLS_WINDOWS
 #include "Platform/Windows/WindowsPlatformTools.h"
 #include "Engine/Platform/Windows/WindowsPlatformSettings.h"
@@ -380,6 +381,7 @@ bool GameCooker::IsCancelRequested()
 
 PlatformTools* GameCooker::GetTools(BuildPlatform platform)
 {
+    PROFILE_MEM(Editor);
     PlatformTools* result = nullptr;
     if (!Tools.TryGet(platform, result))
     {
@@ -471,6 +473,7 @@ bool GameCooker::Build(BuildPlatform platform, BuildConfiguration configuration,
         LOG(Error, "Build platform {0} is not supported.", ::ToString(platform));
         return true;
     }
+    PROFILE_MEM(Editor);
 
     // Setup
     CancelFlag = 0;
@@ -624,6 +627,7 @@ void GameCookerImpl::ReportProgress(const String& info, float totalProgress)
 
 void GameCookerImpl::OnCollectAssets(HashSet<Guid>& assets)
 {
+    PROFILE_MEM(Editor);
     if (Internal_OnCollectAssets == nullptr)
     {
         auto c = GameCooker::GetStaticClass();
@@ -651,6 +655,7 @@ void GameCookerImpl::OnCollectAssets(HashSet<Guid>& assets)
 
 bool GameCookerImpl::Build()
 {
+    PROFILE_MEM(Editor);
     CookingData& data = *Data;
     LOG(Info, "Starting Game Cooker...");
     LOG(Info, "Platform: {0}, Configuration: {2}, Options: {1}", ::ToString(data.Platform), (int32)data.Options, ::ToString(data.Configuration));
@@ -778,6 +783,8 @@ int32 GameCookerImpl::ThreadFunction()
 
 bool GameCookerService::Init()
 {
+    PROFILE_MEM(Editor);
+
     auto editorAssembly = ((NativeBinaryModule*)GetBinaryModuleFlaxEngine())->Assembly;
     editorAssembly->Unloading.Bind(OnEditorAssemblyUnloading);
     GameCooker::OnCollectAssets.Bind(OnCollectAssets);
@@ -789,6 +796,7 @@ void GameCookerService::Update()
 {
     if (IsRunning)
     {
+        PROFILE_MEM(Editor);
         ScopeLock lock(ProgressLocker);
 
         if (ProgressMsg.HasChars())

Source/Editor/Cooker/Platform/Mac/MacPlatformTools.cpp

@@ -186,7 +186,7 @@ bool MacPlatformTools::OnPostProcess(CookingData& data)
         ADD_ENTRY("CFBundlePackageType", "APPL");
         ADD_ENTRY("NSPrincipalClass", "NSApplication");
         ADD_ENTRY("LSApplicationCategoryType", "public.app-category.games");
-        ADD_ENTRY("LSMinimumSystemVersion", "10.15");
+        ADD_ENTRY("LSMinimumSystemVersion", "13");
         ADD_ENTRY("CFBundleIconFile", "icon.icns");
         ADD_ENTRY_STR("CFBundleExecutable", executableName);
         ADD_ENTRY_STR("CFBundleIdentifier", appIdentifier);

Source/Editor/Cooker/Steps/CookAssetsStep.cpp

@@ -36,6 +36,7 @@
 #include "Engine/Engine/Base/GameBase.h"
 #include "Engine/Engine/Globals.h"
 #include "Engine/Tools/TextureTool/TextureTool.h"
+#include "Engine/Threading/Threading.h"
 #include "Engine/Profiler/ProfilerCPU.h"
 #include "Engine/Scripting/Enums.h"
 #if PLATFORM_TOOLS_WINDOWS

Source/Editor/CustomEditors/CustomEditorsUtil.cpp

@@ -6,6 +6,8 @@
 #include "Engine/Core/Types/TimeSpan.h"
 #include "Engine/Core/Types/Stopwatch.h"
 #include "Engine/Core/Collections/Dictionary.h"
+#include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Engine/EngineService.h"
 #include "Engine/Scripting/Scripting.h"
 #include "Engine/Scripting/BinaryModule.h"
@@ -69,6 +71,7 @@ MTypeObject* CustomEditorsUtil::GetCustomEditor(MTypeObject* refType)
 
 bool CustomEditorsUtilService::Init()
 {
+    PROFILE_MEM(Editor);
     TRACK_ASSEMBLY(((NativeBinaryModule*)GetBinaryModuleFlaxEngine())->Assembly);
     Scripting::BinaryModuleLoaded.Bind(&OnBinaryModuleLoaded);
 
@@ -77,6 +80,8 @@ bool CustomEditorsUtilService::Init()
 
 void OnAssemblyLoaded(MAssembly* assembly)
 {
+    PROFILE_CPU_NAMED("CustomEditors.OnAssemblyLoaded");
+    PROFILE_MEM(Editor);
     Stopwatch stopwatch;
 
     // Prepare FlaxEngine

Source/Editor/CustomEditors/Dedicated/LocalizationSettingsEditor.cs

@@ -190,12 +190,12 @@ namespace FlaxEditor.CustomEditors.Dedicated
                     foreach (var file in files)
                         FindNewKeysCSharp(file, newKeys, allKeys);
 
-                    // C++
-                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.cpp", SearchOption.AllDirectories);
+                    // C/C++
+                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.cpp", SearchOption.AllDirectories).Concat(Directory.GetFiles(Globals.ProjectSourceFolder, "*.c", SearchOption.AllDirectories)).ToArray();
                     filesCount += files.Length;
                     foreach (var file in files)
                         FindNewKeysCpp(file, newKeys, allKeys);
-                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.h", SearchOption.AllDirectories);
+                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.h", SearchOption.AllDirectories).Concat(Directory.GetFiles(Globals.ProjectSourceFolder, "*.hpp", SearchOption.AllDirectories)).ToArray();;
                     filesCount += files.Length;
                     foreach (var file in files)
                         FindNewKeysCpp(file, newKeys, allKeys);

Source/Editor/Editor.cpp

@@ -20,6 +20,7 @@
 #include "Engine/Engine/Engine.h"
 #include "Engine/ShadowsOfMordor/Builder.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "FlaxEngine.Gen.h"
 #if PLATFORM_LINUX
 #include "Engine/Tools/TextureTool/TextureTool.h"
@@ -47,6 +48,7 @@ void Editor::CloseSplashScreen()
 
 bool Editor::CheckProjectUpgrade()
 {
+    PROFILE_MEM(Editor);
     const auto versionFilePath = Globals::ProjectCacheFolder / TEXT("version");
 
     // Load version cache file
@@ -366,6 +368,8 @@ bool Editor::BackupProject()
 
 int32 Editor::LoadProduct()
 {
+    PROFILE_MEM(Editor);
+
     // Flax Editor product
     Globals::ProductName = TEXT("Flax Editor");
     Globals::CompanyName = TEXT("Flax");
@@ -626,6 +630,7 @@ int32 Editor::LoadProduct()
 
 Window* Editor::CreateMainWindow()
 {
+    PROFILE_MEM(Editor);
     Window* window = Managed->GetMainWindow();
 
 #if PLATFORM_LINUX
@@ -662,6 +667,7 @@ bool Editor::Init()
         return true;
     }
     PROFILE_CPU();
+    PROFILE_MEM(Editor);
 
     // If during last lightmaps baking engine crashed we could try to restore the progress
     ShadowsOfMordor::Builder::Instance()->CheckIfRestoreState();
@@ -693,11 +699,13 @@ bool Editor::Init()
 
 void Editor::BeforeRun()
 {
+    PROFILE_MEM(Editor);
     Managed->BeforeRun();
 }
 
 void Editor::BeforeExit()
 {
+    PROFILE_MEM(Editor);
     CloseSplashScreen();
 
     Managed->Exit();
@@ -708,6 +716,8 @@ void Editor::BeforeExit()
 
 void EditorImpl::OnUpdate()
 {
+    PROFILE_MEM(Editor);
+
     // Update c# editor
     Editor::Managed->Update();
 

Source/Editor/GUI/ColumnDefinition.cs

@@ -51,7 +51,7 @@ namespace FlaxEditor.GUI
         /// <summary>
         /// The column title horizontal text alignment
         /// </summary>
-        public TextAlignment TitleAlignment = TextAlignment.Near;
+        public TextAlignment TitleAlignment = TextAlignment.Center;
 
         /// <summary>
         /// The column title margin.

Source/Editor/GUI/ContextMenu/ContextMenuBase.cs

@@ -1,7 +1,10 @@
-#if PLATFORM_WINDOWS
+#if PLATFORM_WINDOWS || PLATFORM_SDL
 #define USE_IS_FOREGROUND
 #else
 #endif
+#if PLATFORM_SDL
+#define USE_SDL_WORKAROUNDS
+#endif
 // Copyright (c) Wojciech Figat. All rights reserved.
 
 using System.Collections.Generic;
@@ -121,7 +124,7 @@ namespace FlaxEditor.GUI.ContextMenu
         }
 
         /// <summary>
-        /// Shows the empty menu popup o na screen.
+        /// Shows the empty menu popup on a screen.
         /// </summary>
         /// <param name="control">The target control.</param>
         /// <param name="area">The target control area to cover.</param>
@@ -256,7 +259,9 @@ namespace FlaxEditor.GUI.ContextMenu
                 desc.AllowMaximize = false;
                 desc.AllowDragAndDrop = false;
                 desc.IsTopmost = true;
-                desc.IsRegularWindow = false;
+                desc.Type = WindowType.Popup;
+                desc.Parent = parentWin.Window;
+                desc.Title = "ContextMenu";
                 desc.HasSizingFrame = false;
                 OnWindowCreating(ref desc);
                 _window = Platform.CreateWindow(ref desc);
@@ -265,6 +270,12 @@ namespace FlaxEditor.GUI.ContextMenu
                     _window.GotFocus += OnWindowGotFocus;
                     _window.LostFocus += OnWindowLostFocus;
                 }
+                
+#if USE_IS_FOREGROUND && USE_SDL_WORKAROUNDS
+                // The focus between popup and parent windows doesn't change, force hide the popup when clicked on parent
+                parentWin.Window.MouseDown += OnWindowMouseDown;
+                _window.Closed += () => parentWin.Window.MouseDown -= OnWindowMouseDown;
+#endif
 
                 // Attach to the window
                 _parentCM = parent as ContextMenuBase;
@@ -440,6 +451,17 @@ namespace FlaxEditor.GUI.ContextMenu
             }
         }
 
+#if USE_SDL_WORKAROUNDS
+        private void OnWindowGotFocus()
+        {
+        }
+        
+        private void OnWindowMouseDown(ref Float2 mousePosition, MouseButton button, ref bool handled)
+        {
+            // The user clicked outside the popup window
+            Hide();
+        }
+#else
         private void OnWindowGotFocus()
         {
             var child = _childCM;
@@ -453,6 +475,7 @@ namespace FlaxEditor.GUI.ContextMenu
                 });
             }
         }
+#endif
 
         private void OnWindowLostFocus()
         {
@@ -551,7 +574,12 @@ namespace FlaxEditor.GUI.ContextMenu
             // Let root context menu to check if none of the popup windows
             if (_parentCM == null && UseVisibilityControl && !IsForeground)
             {
+#if USE_SDL_WORKAROUNDS
+                if (!IsMouseOver)
+                    Hide();
+#else
                 Hide();
+#endif
             }
         }
 #endif

Source/Editor/GUI/Dialogs/ColorPickerDialog.cs

@@ -326,8 +326,11 @@ namespace FlaxEditor.GUI.Dialogs
             // Update eye dropper tool
             if (_activeEyedropper)
             {
+                // Try reading the color under the cursor in realtime if supported by the platform
                 Float2 mousePosition = Platform.MousePosition;
-                SelectedColor = ScreenUtilities.GetColorAt(mousePosition);
+                Color color = ScreenUtilities.GetColorAt(mousePosition);
+                if (color != Color.Transparent)
+                    SelectedColor = color;
             }
         }
 

Source/Editor/GUI/Docking/DockHintWindow.cs

@@ -1,545 +0,0 @@
-// Copyright (c) Wojciech Figat. All rights reserved.
-
-using System;
-using FlaxEngine;
-using FlaxEngine.GUI;
-
-namespace FlaxEditor.GUI.Docking
-{
-    /// <summary>
-    /// Helper class used to handle docking windows dragging and docking.
-    /// </summary>
-    public class DockHintWindow
-    {
-        private FloatWindowDockPanel _toMove;
-
-        private Float2 _dragOffset;
-        private Float2 _defaultWindowSize;
-        private Rectangle _rectDock;
-        private Rectangle _rectWindow;
-        private Float2 _mouse;
-        private DockState _toSet;
-        private DockPanel _toDock;
-        private bool _lateDragOffsetUpdate;
-
-        private Rectangle _rLeft, _rRight, _rBottom, _rUpper, _rCenter;
-
-        private DockHintWindow(FloatWindowDockPanel toMove)
-        {
-            _toMove = toMove;
-            _toSet = DockState.Float;
-            var window = toMove.Window.Window;
-
-            // Remove focus from drag target
-            _toMove.Focus();
-            _toMove.Defocus();
-
-            // Focus window
-            window.Focus();
-
-            // Check if window is maximized and restore window.
-            if (window.IsMaximized)
-            {
-                // Restore window and set position to mouse.
-                var mousePos = window.MousePosition;
-                var previousSize = window.Size;
-                window.Restore();
-                window.Position = Platform.MousePosition - mousePos * window.Size / previousSize;
-            }
-
-            // Calculate dragging offset and move window to the destination position
-            var mouseScreenPosition = Platform.MousePosition;
-
-            // If the _toMove window was not focused when initializing this window, the result vector only contains zeros
-            // and to prevent a failure, we need to perform an update for the drag offset at later time which will be done in the OnMouseMove event handler.
-            if (mouseScreenPosition != Float2.Zero)
-                CalculateDragOffset(mouseScreenPosition);
-            else
-                _lateDragOffsetUpdate = true;
-
-            // Get initial size
-            _defaultWindowSize = window.Size;
-
-            // Init proxy window
-            Proxy.Init(ref _defaultWindowSize);
-
-            // Bind events
-            Proxy.Window.MouseUp += OnMouseUp;
-            Proxy.Window.MouseMove += OnMouseMove;
-            Proxy.Window.LostFocus += OnLostFocus;
-
-            // Start tracking mouse
-            Proxy.Window.StartTrackingMouse(false);
-
-            // Update window GUI
-            Proxy.Window.GUI.PerformLayout();
-
-            // Update rectangles
-            UpdateRects();
-
-            // Hide base window
-            window.Hide();
-
-            // Enable hit window presentation
-            Proxy.Window.RenderingEnabled = true;
-            Proxy.Window.Show();
-            Proxy.Window.Focus();
-        }
-
-        /// <summary>
-        /// Releases unmanaged and - optionally - managed resources.
-        /// </summary>
-        public void Dispose()
-        {
-            // End tracking mouse
-            Proxy.Window.EndTrackingMouse();
-
-            // Disable rendering
-            Proxy.Window.RenderingEnabled = false;
-
-            // Unbind events
-            Proxy.Window.MouseUp -= OnMouseUp;
-            Proxy.Window.MouseMove -= OnMouseMove;
-            Proxy.Window.LostFocus -= OnLostFocus;
-
-            // Hide the proxy
-            Proxy.Hide();
-
-            if (_toMove == null)
-                return;
-
-            // Check if window won't be docked
-            if (_toSet == DockState.Float)
-            {
-                var window = _toMove.Window?.Window;
-                if (window == null)
-                    return;
-                var mouse = Platform.MousePosition;
-
-                // Move base window
-                window.Position = mouse - _dragOffset;
-
-                // Show base window
-                window.Show();
-            }
-            else
-            {
-                bool hasNoChildPanels = _toMove.ChildPanelsCount == 0;
-
-                // Check if window has only single tab
-                if (hasNoChildPanels && _toMove.TabsCount == 1)
-                {
-                    // Dock window
-                    _toMove.GetTab(0).Show(_toSet, _toDock);
-                }
-                // Check if dock as tab and has no child panels
-                else if (hasNoChildPanels && _toSet == DockState.DockFill)
-                {
-                    // Dock all tabs
-                    while (_toMove.TabsCount > 0)
-                    {
-                        _toMove.GetTab(0).Show(DockState.DockFill, _toDock);
-                    }
-                }
-                else
-                {
-                    var selectedTab = _toMove.SelectedTab;
-
-                    // Dock the first tab into the target location
-                    var firstTab = _toMove.GetTab(0);
-                    firstTab.Show(_toSet, _toDock);
-
-                    // Dock rest of the tabs
-                    while (_toMove.TabsCount > 0)
-                    {
-                        _toMove.GetTab(0).Show(DockState.DockFill, firstTab);
-                    }
-
-                    // Keep selected tab being selected
-                    selectedTab?.SelectTab();
-                }
-
-                // Focus target window
-                _toDock.Root.Focus();
-            }
-
-            _toMove = null;
-        }
-
-        /// <summary>
-        /// Creates the new dragging hit window.
-        /// </summary>
-        /// <param name="toMove">Floating dock panel to move.</param>
-        /// <returns>The dock hint window object.</returns>
-        public static DockHintWindow Create(FloatWindowDockPanel toMove)
-        {
-            if (toMove == null)
-                throw new ArgumentNullException();
-
-            return new DockHintWindow(toMove);
-        }
-
-        /// <summary>
-        /// Creates the new dragging hit window.
-        /// </summary>
-        /// <param name="toMove">Dock window to move.</param>
-        /// <returns>The dock hint window object.</returns>
-        public static DockHintWindow Create(DockWindow toMove)
-        {
-            if (toMove == null)
-                throw new ArgumentNullException();
-
-            // Show floating
-            toMove.ShowFloating();
-
-            // Move window to the mouse position (with some offset for caption bar)
-            var window = (WindowRootControl)toMove.Root;
-            var mouse = Platform.MousePosition;
-            window.Window.Position = mouse - new Float2(8, 8);
-
-            // Get floating panel
-            var floatingPanelToMove = window.GetChild(0) as FloatWindowDockPanel;
-
-            return new DockHintWindow(floatingPanelToMove);
-        }
-
-        /// <summary>
-        /// Calculates window rectangle in the dock window.
-        /// </summary>
-        /// <param name="state">Window dock state.</param>
-        /// <param name="rect">Dock panel rectangle.</param>
-        /// <returns>Calculated window rectangle.</returns>
-        public static Rectangle CalculateDockRect(DockState state, ref Rectangle rect)
-        {
-            Rectangle result = rect;
-            switch (state)
-            {
-            case DockState.DockFill:
-                result.Location.Y += DockPanel.DefaultHeaderHeight;
-                result.Size.Y -= DockPanel.DefaultHeaderHeight;
-                break;
-            case DockState.DockTop:
-                result.Size.Y *= DockPanel.DefaultSplitterValue;
-                break;
-            case DockState.DockLeft:
-                result.Size.X *= DockPanel.DefaultSplitterValue;
-                break;
-            case DockState.DockBottom:
-                result.Location.Y += result.Size.Y * (1 - DockPanel.DefaultSplitterValue);
-                result.Size.Y *= DockPanel.DefaultSplitterValue;
-                break;
-            case DockState.DockRight:
-                result.Location.X += result.Size.X * (1 - DockPanel.DefaultSplitterValue);
-                result.Size.X *= DockPanel.DefaultSplitterValue;
-                break;
-            }
-            return result;
-        }
-
-        private void CalculateDragOffset(Float2 mouseScreenPosition)
-        {
-            var baseWinPos = _toMove.Window.Window.Position;
-            _dragOffset = mouseScreenPosition - baseWinPos;
-        }
-
-        private void UpdateRects()
-        {
-            // Cache mouse position
-            _mouse = Platform.MousePosition;
-
-            // Check intersection with any dock panel
-            var uiMouse = _mouse;
-            _toDock = _toMove.MasterPanel.HitTest(ref uiMouse, _toMove);
-
-            // Check dock state to use
-            bool showProxyHints = _toDock != null;
-            bool showBorderHints = showProxyHints;
-            bool showCenterHint = showProxyHints;
-            if (showProxyHints)
-            {
-                // If moved window has not only tabs but also child panels disable docking as tab
-                if (_toMove.ChildPanelsCount > 0)
-                    showCenterHint = false;
-
-                // Disable docking windows with one or more dock panels inside
-                if (_toMove.ChildPanelsCount > 0)
-                    showBorderHints = false;
-
-                // Get dock area
-                _rectDock = _toDock.DockAreaBounds;
-
-                // Cache dock rectangles
-                var size = _rectDock.Size;
-                var offset = _rectDock.Location;
-                var borderMargin = 4.0f;
-                var hintWindowsSize = Proxy.HintWindowsSize * Platform.DpiScale;
-                var hintWindowsSize2 = hintWindowsSize * 0.5f;
-                var centerX = size.X * 0.5f;
-                var centerY = size.Y * 0.5f;
-                _rUpper = new Rectangle(centerX - hintWindowsSize2, borderMargin, hintWindowsSize, hintWindowsSize) + offset;
-                _rBottom = new Rectangle(centerX - hintWindowsSize2, size.Y - hintWindowsSize - borderMargin, hintWindowsSize, hintWindowsSize) + offset;
-                _rLeft = new Rectangle(borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
-                _rRight = new Rectangle(size.X - hintWindowsSize - borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
-                _rCenter = new Rectangle(centerX - hintWindowsSize2, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
-
-                // Hit test
-                DockState toSet = DockState.Float;
-                if (showBorderHints)
-                {
-                    if (_rUpper.Contains(_mouse))
-                        toSet = DockState.DockTop;
-                    else if (_rBottom.Contains(_mouse))
-                        toSet = DockState.DockBottom;
-                    else if (_rLeft.Contains(_mouse))
-                        toSet = DockState.DockLeft;
-                    else if (_rRight.Contains(_mouse))
-                        toSet = DockState.DockRight;
-                }
-                if (showCenterHint && _rCenter.Contains(_mouse))
-                    toSet = DockState.DockFill;
-                _toSet = toSet;
-
-                // Show proxy hint windows
-                Proxy.Down.Position = _rBottom.Location;
-                Proxy.Left.Position = _rLeft.Location;
-                Proxy.Right.Position = _rRight.Location;
-                Proxy.Up.Position = _rUpper.Location;
-                Proxy.Center.Position = _rCenter.Location;
-            }
-            else
-            {
-                _toSet = DockState.Float;
-            }
-
-            // Update proxy hint windows visibility
-            Proxy.Down.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Left.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Right.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Up.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Center.IsVisible = showProxyHints & showCenterHint;
-
-            // Calculate proxy/dock/window rectangles
-            if (_toDock == null)
-            {
-                // Floating window over nothing
-                _rectWindow = new Rectangle(_mouse - _dragOffset, _defaultWindowSize);
-            }
-            else
-            {
-                if (_toSet == DockState.Float)
-                {
-                    // Floating window over dock panel
-                    _rectWindow = new Rectangle(_mouse - _dragOffset, _defaultWindowSize);
-                }
-                else
-                {
-                    // Use only part of the dock panel to show hint
-                    _rectWindow = CalculateDockRect(_toSet, ref _rectDock);
-                }
-            }
-
-            // Update proxy window
-            Proxy.Window.ClientBounds = _rectWindow;
-        }
-
-        private void OnMouseUp(ref Float2 location, MouseButton button, ref bool handled)
-        {
-            if (button == MouseButton.Left)
-            {
-                Dispose();
-            }
-        }
-
-        private void OnMouseMove(ref Float2 mousePos)
-        {
-            // Recalculate the drag offset because the current mouse screen position was invalid when we initialized the window
-            if (_lateDragOffsetUpdate)
-            {
-                // Calculate dragging offset and move window to the destination position
-                CalculateDragOffset(mousePos);
-
-                // Reset state
-                _lateDragOffsetUpdate = false;
-            }
-
-            UpdateRects();
-        }
-
-        private void OnLostFocus()
-        {
-            Dispose();
-        }
-
-        /// <summary>
-        /// Contains helper proxy windows shared across docking panels. They are used to visualize docking window locations.
-        /// </summary>
-        public static class Proxy
-        {
-            /// <summary>
-            /// The drag proxy window.
-            /// </summary>
-            public static Window Window;
-
-            /// <summary>
-            /// The left hint proxy window.
-            /// </summary>
-            public static Window Left;
-
-            /// <summary>
-            /// The right hint proxy window.
-            /// </summary>
-            public static Window Right;
-
-            /// <summary>
-            /// The up hint proxy window.
-            /// </summary>
-            public static Window Up;
-
-            /// <summary>
-            /// The down hint proxy window.
-            /// </summary>
-            public static Window Down;
-
-            /// <summary>
-            /// The center hint proxy window.
-            /// </summary>
-            public static Window Center;
-
-            /// <summary>
-            /// The hint windows size.
-            /// </summary>
-            public const float HintWindowsSize = 32.0f;
-
-            /// <summary>
-            /// Initializes the hit proxy windows. Those windows are used to indicate drag target areas (left, right, top, bottom, etc.).
-            /// </summary>
-            public static void InitHitProxy()
-            {
-                CreateProxy(ref Left, "DockHint.Left");
-                CreateProxy(ref Right, "DockHint.Right");
-                CreateProxy(ref Up, "DockHint.Up");
-                CreateProxy(ref Down, "DockHint.Down");
-                CreateProxy(ref Center, "DockHint.Center");
-            }
-
-            /// <summary>
-            /// Initializes the hint window.
-            /// </summary>
-            /// <param name="initSize">Initial size of the proxy window.</param>
-            public static void Init(ref Float2 initSize)
-            {
-                if (Window == null)
-                {
-                    var settings = CreateWindowSettings.Default;
-                    settings.Title = "DockHint.Window";
-                    settings.Size = initSize;
-                    settings.AllowInput = true;
-                    settings.AllowMaximize = false;
-                    settings.AllowMinimize = false;
-                    settings.HasBorder = false;
-                    settings.HasSizingFrame = false;
-                    settings.IsRegularWindow = false;
-                    settings.SupportsTransparency = true;
-                    settings.ShowInTaskbar = false;
-                    settings.ShowAfterFirstPaint = false;
-                    settings.IsTopmost = true;
-
-                    Window = Platform.CreateWindow(ref settings);
-                    Window.Opacity = 0.6f;
-                    Window.GUI.BackgroundColor = Style.Current.Selection;
-                    Window.GUI.AddChild<DragVisuals>();
-                }
-                else
-                {
-                    // Resize proxy
-                    Window.ClientSize = initSize;
-                }
-
-                InitHitProxy();
-            }
-
-            private sealed class DragVisuals : Control
-            {
-                public DragVisuals()
-                {
-                    AnchorPreset = AnchorPresets.StretchAll;
-                    Offsets = Margin.Zero;
-                }
-
-                public override void Draw()
-                {
-                    Render2D.DrawRectangle(new Rectangle(Float2.Zero, Size), Style.Current.SelectionBorder);
-                }
-            }
-
-            private static void CreateProxy(ref Window win, string name)
-            {
-                if (win != null)
-                    return;
-
-                var settings = CreateWindowSettings.Default;
-                settings.Title = name;
-                settings.Size = new Float2(HintWindowsSize * Platform.DpiScale);
-                settings.AllowInput = false;
-                settings.AllowMaximize = false;
-                settings.AllowMinimize = false;
-                settings.HasBorder = false;
-                settings.HasSizingFrame = false;
-                settings.IsRegularWindow = false;
-                settings.SupportsTransparency = true;
-                settings.ShowInTaskbar = false;
-                settings.ActivateWhenFirstShown = false;
-                settings.IsTopmost = true;
-                settings.ShowAfterFirstPaint = false;
-
-                win = Platform.CreateWindow(ref settings);
-                win.Opacity = 0.6f;
-                win.GUI.BackgroundColor = Style.Current.Selection;
-                win.GUI.AddChild<DragVisuals>();
-            }
-
-            /// <summary>
-            /// Hides proxy windows.
-            /// </summary>
-            public static void Hide()
-            {
-                HideProxy(ref Window);
-                HideProxy(ref Left);
-                HideProxy(ref Right);
-                HideProxy(ref Up);
-                HideProxy(ref Down);
-                HideProxy(ref Center);
-            }
-
-            private static void HideProxy(ref Window win)
-            {
-                if (win)
-                {
-                    win.Hide();
-                }
-            }
-
-            /// <summary>
-            /// Releases proxy data and windows.
-            /// </summary>
-            public static void Dispose()
-            {
-                DisposeProxy(ref Window);
-                DisposeProxy(ref Left);
-                DisposeProxy(ref Right);
-                DisposeProxy(ref Up);
-                DisposeProxy(ref Down);
-                DisposeProxy(ref Center);
-            }
-
-            private static void DisposeProxy(ref Window win)
-            {
-                if (win)
-                {
-                    win.Close(ClosingReason.User);
-                    win = null;
-                }
-            }
-        }
-    }
-}

Source/Editor/GUI/Docking/DockPanelProxy.cs

@@ -49,6 +49,11 @@ namespace FlaxEditor.GUI.Docking
         /// The mouse position.
         /// </summary>
         public Float2 MousePosition = Float2.Minimum;
+        
+        /// <summary>
+        /// The mouse position.
+        /// </summary>
+        public Float2 MouseStartPosition = Float2.Minimum;
 
         /// <summary>
         /// The start drag asynchronous window.
@@ -165,7 +170,7 @@ namespace FlaxEditor.GUI.Docking
                 if (_panel.ChildPanelsCount == 0 && _panel.TabsCount == 1 && _panel.IsFloating)
                 {
                     // Create docking hint window but in an async manner
-                    DockHintWindow.Create(_panel as FloatWindowDockPanel);
+                    WindowDragHelper.StartDragging(_panel as FloatWindowDockPanel);
                 }
                 else
                 {
@@ -176,7 +181,7 @@ namespace FlaxEditor.GUI.Docking
                     _panel.SelectTab(index - 1);
 
                     // Create docking hint window
-                    DockHintWindow.Create(win);
+                    WindowDragHelper.StartDragging(win, _panel.RootWindow.Window);
                 }
             }
         }
@@ -355,6 +360,7 @@ namespace FlaxEditor.GUI.Docking
             if (IsSingleFloatingWindow)
                 return base.OnMouseDown(location, button);
             MouseDownWindow = GetTabAtPos(location, out IsMouseDownOverCross);
+            MouseStartPosition = location;
 
             // Check buttons
             if (button == MouseButton.Left)
@@ -441,6 +447,20 @@ namespace FlaxEditor.GUI.Docking
                         StartDrag(MouseDownWindow);
                     MouseDownWindow = null;
                 }
+                // Check if single tab is tried to be moved
+                else if (MouseDownWindow != null && _panel.TabsCount <= 1)
+                {
+                    if ((MousePosition - MouseStartPosition).Length > 3)
+                    {
+                        // Clear flag
+                        IsMouseLeftButtonDown = false;
+
+                        // Check tab under the mouse
+                        if (!IsMouseDownOverCross && MouseDownWindow != null)
+                            StartDrag(MouseDownWindow);
+                        MouseDownWindow = null;
+                    }
+                }
                 // Check if has more than one tab to change order
                 else if (MouseDownWindow != null && _panel.TabsCount > 1)
                 {

Source/Editor/GUI/Docking/DockWindow.cs

@@ -182,6 +182,25 @@ namespace FlaxEditor.GUI.Docking
         /// <param name="size">Window size, set <see cref="Float2.Zero"/> to use default.</param>
         /// <param name="position">Window location.</param>
         public void ShowFloating(Float2 location, Float2 size, WindowStartPosition position = WindowStartPosition.CenterParent)
+        {
+            CreateFloating(location, size, position, true);
+        }
+
+        /// <summary>
+        /// Creates the window in a floating state.
+        /// </summary>
+        public void CreateFloating()
+        {
+            CreateFloating(Float2.Zero, Float2.Zero);
+        }
+        /// <summary>
+        /// Creates the window in a floating state.
+        /// </summary>
+        /// <param name="location">Window location.</param>
+        /// <param name="size">Window size, set <see cref="Float2.Zero"/> to use default.</param>
+        /// <param name="position">Window location.</param>
+        /// <param name="showWindow">Window visibility.</param>
+        public void CreateFloating(Float2 location, Float2 size, WindowStartPosition position = WindowStartPosition.CenterParent, bool showWindow = false)
         {
             Undock();
 
@@ -199,14 +218,17 @@ namespace FlaxEditor.GUI.Docking
             windowGUI.UnlockChildrenRecursive();
             windowGUI.PerformLayout();
 
-            // Show
-            window.Show();
-            window.BringToFront();
-            window.Focus();
-            OnShow();
+            if (showWindow)
+            {
+                // Show
+                window.Show();
+                window.BringToFront();
+                window.Focus();
+                OnShow();
 
-            // Perform layout again
-            windowGUI.PerformLayout();
+                // Perform layout again
+                windowGUI.PerformLayout();
+            }
         }
 
         /// <summary>

Source/Editor/GUI/Docking/FloatWindowDockPanel.cs

@@ -11,6 +11,42 @@ namespace FlaxEditor.GUI.Docking
     /// <seealso cref="DockPanel" />
     public class FloatWindowDockPanel : DockPanel
     {
+        private class FloatWindowDecorations : WindowDecorations
+        {
+            private FloatWindowDockPanel _panel;
+            
+            public FloatWindowDecorations(FloatWindowDockPanel panel)
+            : base(panel.RootWindow)
+            {
+                _panel = panel;
+            }
+            
+            /// <inheritdoc />
+            public override bool OnMouseDown(Float2 location, MouseButton button)
+            {
+                if (Title.Bounds.Contains(location) && button == MouseButton.Left)
+                {
+                    _panel.BeginDrag();
+                    return true;
+                }
+                return base.OnMouseDown(location, button);
+            }
+
+#if !PLATFORM_WINDOWS
+            /// <inheritdoc />
+            protected override WindowHitCodes OnHitTest(ref Float2 mouse)
+            {
+                var hit = base.OnHitTest(ref mouse);
+                if (hit == WindowHitCodes.Caption)
+                {
+                    // Override the system behaviour when interacting with the caption area
+                    hit = WindowHitCodes.Client;
+                }
+                return hit;
+            }
+#endif
+        }
+
         private MasterDockPanel _masterPanel;
         private WindowRootControl _window;
 
@@ -40,6 +76,26 @@ namespace FlaxEditor.GUI.Docking
             Parent = window;
             _window.Window.Closing += OnClosing;
             _window.Window.LeftButtonHit += OnLeftButtonHit;
+            
+            if (Utilities.Utils.UseCustomWindowDecorations())
+            {
+                var decorations = Parent.AddChild(new FloatWindowDecorations(this));
+                decorations.SetAnchorPreset(AnchorPresets.HorizontalStretchTop, false);
+            }
+        }
+        
+        /// <inheritdoc />
+        protected override void PerformLayoutBeforeChildren()
+        {
+            base.PerformLayoutBeforeChildren();
+            
+            var decorations = Parent.GetChild<FloatWindowDecorations>();
+            if (decorations != null)
+            {
+                // Apply offset for the title bar
+                foreach (var child in Children)
+                    child.Bounds = child.Bounds with { Y = decorations.Height, Height = Parent.Height - decorations.Height };
+            }
         }
 
         /// <summary>
@@ -52,7 +108,7 @@ namespace FlaxEditor.GUI.Docking
                 return;
 
             // Create docking hint window
-            DockHintWindow.Create(this);
+            WindowDragHelper.StartDragging(this);
         }
 
         /// <summary>
@@ -71,22 +127,28 @@ namespace FlaxEditor.GUI.Docking
             settings.Title = title;
             settings.Size = size;
             settings.Position = location;
-            settings.MinimumSize = new Float2(1);
+            settings.MinimumSize = new Float2(200, 150);
             settings.MaximumSize = Float2.Zero; // Unlimited size
             settings.Fullscreen = false;
             settings.HasBorder = true;
-            settings.SupportsTransparency = false;
+            settings.SupportsTransparency = true;
             settings.ActivateWhenFirstShown = true;
             settings.AllowInput = true;
             settings.AllowMinimize = true;
             settings.AllowMaximize = true;
             settings.AllowDragAndDrop = true;
             settings.IsTopmost = false;
-            settings.IsRegularWindow = true;
+            settings.Type = WindowType.Regular;
             settings.HasSizingFrame = true;
             settings.ShowAfterFirstPaint = false;
             settings.ShowInTaskbar = true;
             settings.StartPosition = startPosition;
+            
+            if (Utilities.Utils.UseCustomWindowDecorations())
+            {
+                settings.HasBorder = false;
+                //settings.HasSizingFrame = false;
+            }
 
             // Create window
             return Platform.CreateWindow(ref settings);

Source/Editor/GUI/Docking/MasterDockPanel.cs

@@ -81,7 +81,6 @@ namespace FlaxEditor.GUI.Docking
         public DockPanel HitTest(ref Float2 position, FloatWindowDockPanel excluded)
         {
             // Check all floating windows
-            // TODO: gather windows order and take it into account when performing test
             for (int i = 0; i < FloatingPanels.Count; i++)
             {
                 var win = FloatingPanels[i];
@@ -94,9 +93,44 @@ namespace FlaxEditor.GUI.Docking
             }
 
             // Base
+            //if (!Root?.RootWindow.Window.IsFocused ?? false)
+            //    return null;
             return base.HitTest(ref position);
         }
 
+        /// <summary>
+        /// Performs hit test over dock panel.
+        /// </summary>
+        /// <param name="position">Window space position to test.</param>
+        /// <param name="excluded">Floating window to omit during searching (and all docked to that one).</param>
+        /// <param name="hitResults">Results of the hit test</param>
+        /// <returns>True if any dock panels were hit, otherwise false.</returns>
+        public bool HitTest(ref Float2 position, FloatWindowDockPanel excluded, out DockPanel[] hitResults)
+        {
+            // Check all floating windows
+            List<DockPanel> results = new(FloatingPanels.Count);
+            for (int i = 0; i < FloatingPanels.Count; i++)
+            {
+                var win = FloatingPanels[i];
+                if (win.Visible && win != excluded)
+                {
+                    var result = win.HitTest(ref position);
+                    if (result != null)
+                        results.Add(result);
+                }
+            }
+
+            // Base
+            //if (!Root?.RootWindow.Window.IsFocused ?? false)
+            //    return null;
+            var baseResult = base.HitTest(ref position);
+            if (baseResult != null)
+                results.Add(baseResult);
+
+            hitResults = results.ToArray();
+            return hitResults.Length > 0;
+        }
+
         internal void LinkWindow(DockWindow window)
         {
             // Add to the windows list

Source/Editor/GUI/Docking/WindowDragHelper.cs

@@ -0,0 +1,458 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+using System;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.GUI.Docking
+{
+    /// <summary>
+    /// Helper class used to handle docking windows dragging and docking.
+    /// </summary>
+    public class WindowDragHelper
+    {
+        private FloatWindowDockPanel _toMove;
+
+        private Float2 _dragOffset;
+        private Rectangle _rectDock;
+        private Float2 _mouse;
+        private DockState _toSet;
+        private DockPanel _toDock;
+        private Window _dragSourceWindow;
+
+        private Rectangle _rLeft, _rRight, _rBottom, _rUpper, _rCenter;
+        private Control _dockHintDown, _dockHintUp, _dockHintLeft, _dockHintRight, _dockHintCenter;
+
+        /// <summary>
+        /// The hint control size.
+        /// </summary>
+        public const float HintControlSize = 32.0f;
+
+        /// <summary>
+        /// The opacity of the dragged window when hint controls are shown.
+        /// </summary>
+        public const float DragWindowOpacity = 0.4f;
+        
+        /// <summary>
+        /// Returns true if any windows are being dragged.
+        /// </summary>
+        public static bool IsDragActive { get; private set; }
+
+        private WindowDragHelper(FloatWindowDockPanel toMove, Window dragSourceWindow)
+        {
+            IsDragActive = true;
+            _toMove = toMove;
+            _toSet = DockState.Float;
+            var window = toMove.Window.Window;
+
+            // Bind events
+            FlaxEngine.Scripting.Update += OnUpdate;
+            window.MouseUp += OnMouseUp;
+            
+            // Update rectangles
+            UpdateRects(Platform.MousePosition);
+            
+            // Ensure the dragged window stays on top of every other window
+            window.IsAlwaysOnTop = true;
+
+            _dragSourceWindow = dragSourceWindow;
+            if (_dragSourceWindow != null) // Detaching a tab from existing window
+            {
+                _dragOffset = new Float2(window.Size.X / 2, 10.0f);
+                
+                _dragSourceWindow.MouseUp += OnMouseUp; // The mouse up event is sent to the source window on Windows
+
+                // TODO: when detaching tab in floating window (not main window), the drag source window is still main window?
+                var dragSourceWindowWayland = toMove.MasterPanel?.RootWindow.Window ?? Editor.Instance.Windows.MainWindow;
+                window.DoDragDrop(window.Title, _dragOffset, dragSourceWindowWayland);
+            }
+            else
+            {
+                _dragOffset = window.MousePosition;
+                window.DoDragDrop(window.Title, _dragOffset, window);
+            }
+        }
+
+        /// <summary>
+        /// Releases unmanaged and - optionally - managed resources.
+        /// </summary>
+        public void Dispose()
+        {
+            IsDragActive = false;
+            var window = _toMove?.Window?.Window;
+
+            // Unbind events
+            FlaxEngine.Scripting.Update -= OnUpdate;
+            if (window != null)
+                window.MouseUp -= OnMouseUp;
+            if (_dragSourceWindow != null)
+                _dragSourceWindow.MouseUp -= OnMouseUp;
+
+            RemoveDockHints();
+
+            if (_toMove == null)
+                return;
+
+            if (window != null)
+            {
+                window.Opacity = 1.0f;
+                window.IsAlwaysOnTop = false;
+                window.BringToFront();
+            }
+
+            // Check if window won't be docked
+            if (_toSet == DockState.Float)
+            {
+                if (window == null)
+                    return;
+
+                // Show base window
+                window.Show();
+            }
+            else
+            {
+                bool hasNoChildPanels = _toMove.ChildPanelsCount == 0;
+
+                // Check if window has only single tab
+                if (hasNoChildPanels && _toMove.TabsCount == 1)
+                {
+                    // Dock window
+                    _toMove.GetTab(0).Show(_toSet, _toDock);
+                }
+                // Check if dock as tab and has no child panels
+                else if (hasNoChildPanels && _toSet == DockState.DockFill)
+                {
+                    // Dock all tabs
+                    while (_toMove.TabsCount > 0)
+                    {
+                        _toMove.GetTab(0).Show(DockState.DockFill, _toDock);
+                    }
+                }
+                else
+                {
+                    var selectedTab = _toMove.SelectedTab;
+
+                    // Dock the first tab into the target location
+                    if (_toMove.TabsCount > 0)
+                    {
+                        var firstTab = _toMove.GetTab(0);
+                        firstTab.Show(_toSet, _toDock);
+
+                        // Dock rest of the tabs
+                        while (_toMove.TabsCount > 0)
+                        {
+                            _toMove.GetTab(0).Show(DockState.DockFill, firstTab);
+                        }
+                    }
+
+                    // Keep selected tab being selected
+                    selectedTab?.SelectTab();
+                }
+
+                // Focus target window
+                _toDock.Root.Focus();
+            }
+
+            _toMove = null;
+        }
+
+        /// <summary>
+        /// Start dragging a floating dock panel.
+        /// </summary>
+        /// <param name="toMove">Floating dock panel to move.</param>
+        /// <returns>The window drag helper object.</returns>
+        public static WindowDragHelper StartDragging(FloatWindowDockPanel toMove)
+        {
+            if (toMove == null)
+                throw new ArgumentNullException();
+
+            return new WindowDragHelper(toMove, null);
+        }
+
+        /// <summary>
+        /// Start dragging a docked panel into a floating window.
+        /// </summary>
+        /// <param name="toMove">Dock window to move.</param>
+        /// <param name="dragSourceWindow">The window where dragging started from.</param>
+        /// <returns>The window drag helper object.</returns>
+        public static WindowDragHelper StartDragging(DockWindow toMove, Window dragSourceWindow)
+        {
+            if (toMove == null)
+                throw new ArgumentNullException();
+
+            // Create floating window
+            toMove.CreateFloating();
+
+            // Get floating panel
+            var window = (WindowRootControl)toMove.Root;
+            var floatingPanelToMove = window.GetChild(0) as FloatWindowDockPanel;
+
+            return new WindowDragHelper(floatingPanelToMove, dragSourceWindow);
+        }
+
+        private sealed class DragVisuals : Control
+        {
+            public DragVisuals()
+            {
+                AnchorPreset = AnchorPresets.StretchAll;
+                Offsets = Margin.Zero;
+            }
+
+            public override void Draw()
+            {
+                base.Draw();
+                Render2D.DrawRectangle(new Rectangle(Float2.Zero, Size), Style.Current.SelectionBorder);
+            }
+        }
+
+        private void AddDockHints()
+        {
+            if (_toDock == null)
+                return;
+
+            if (_toDock.RootWindow.Window != _dragSourceWindow)
+                _toDock.RootWindow.Window.MouseUp += OnMouseUp;
+
+            _dockHintDown = AddHintControl(new Float2(0.5f, 1));
+            _dockHintUp = AddHintControl(new Float2(0.5f, 0));
+            _dockHintLeft = AddHintControl(new Float2(0, 0.5f));
+            _dockHintRight = AddHintControl(new Float2(1, 0.5f));
+            _dockHintCenter = AddHintControl(new Float2(0.5f, 0.5f));
+
+            Control AddHintControl(Float2 pivot)
+            {
+                DragVisuals hintControl = _toDock.AddChild<DragVisuals>();
+                hintControl.Size = new Float2(HintControlSize);
+                hintControl.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                hintControl.Pivot = pivot;
+                hintControl.PivotRelative = true;
+                return hintControl;
+            }
+        }
+        
+        private void RemoveDockHints()
+        {
+            if (_toDock == null)
+                return;
+
+            if (_toDock.RootWindow.Window != _dragSourceWindow)
+                _toDock.RootWindow.Window.MouseUp -= OnMouseUp;
+
+            _dockHintDown?.Parent.RemoveChild(_dockHintDown);
+            _dockHintUp?.Parent.RemoveChild(_dockHintUp);
+            _dockHintLeft?.Parent.RemoveChild(_dockHintLeft);
+            _dockHintRight?.Parent.RemoveChild(_dockHintRight);
+            _dockHintCenter?.Parent.RemoveChild(_dockHintCenter);
+            _dockHintDown = _dockHintUp = _dockHintLeft = _dockHintRight = _dockHintCenter = null;
+        }
+
+        private void UpdateRects(Float2 mousePos)
+        {
+            // Cache mouse position
+            _mouse = mousePos;
+
+            // Check intersection with any dock panel
+            DockPanel dockPanel = null;
+            if (_toMove.MasterPanel.HitTest(ref _mouse, _toMove, out var hitResults))
+            {
+                dockPanel = hitResults[0];
+
+                // Prefer panel which currently has focus
+                foreach (var hit in hitResults)
+                {
+                    if (hit.RootWindow.Window.IsFocused)
+                    {
+                        dockPanel = hit;
+                        break;
+                    }
+                }
+
+                // Prefer panel in the same window we hit earlier
+                if (dockPanel?.RootWindow != _toDock?.RootWindow)
+                {
+                    foreach (var hit in hitResults)
+                    {
+                        if (hit.RootWindow == _toDock?.RootWindow)
+                        {
+                            dockPanel = _toDock;
+                            break;
+                        }
+                    }
+                }
+            }
+            
+            if (dockPanel != _toDock)
+            {
+                RemoveDockHints();
+                _toDock = dockPanel;
+                AddDockHints();
+
+                // Make sure the all the dock hint areas are not under other windows
+                _toDock?.RootWindow.Window.BringToFront();
+                //_toDock?.RootWindow.Window.Focus();
+
+                // Make the dragged window transparent when dock hints are visible
+                _toMove.Window.Window.Opacity = _toDock == null ? 1.0f : DragWindowOpacity;
+            }
+            
+            // Check dock state to use
+            bool showProxyHints = _toDock != null;
+            bool showBorderHints = showProxyHints;
+            bool showCenterHint = showProxyHints;
+            Control hoveredHintControl = null;
+            Float2 hoveredSizeOverride = Float2.Zero;
+            if (showProxyHints)
+            {
+                // If moved window has not only tabs but also child panels disable docking as tab
+                if (_toMove.ChildPanelsCount > 0)
+                    showCenterHint = false;
+
+                // Disable docking windows with one or more dock panels inside
+                if (_toMove.ChildPanelsCount > 0)
+                    showBorderHints = false;
+
+                // Get dock area
+                _rectDock = _toDock.DockAreaBounds;
+
+                // Cache dock rectangles
+                var size = _rectDock.Size / Platform.DpiScale;
+                var offset = _toDock.PointFromScreen(_rectDock.Location);
+                var borderMargin = 4.0f;
+                var hintWindowsSize = HintControlSize;
+                var hintWindowsSize2 = hintWindowsSize * 0.5f;
+                var hintPreviewSize = new Float2(Math.Max(HintControlSize * 2, size.X * 0.5f), Math.Max(HintControlSize * 2, size.Y * 0.5f));
+                var centerX = size.X * 0.5f;
+                var centerY = size.Y * 0.5f;
+                _rUpper = new Rectangle(centerX - hintWindowsSize2, borderMargin, hintWindowsSize, hintWindowsSize) + offset;
+                _rBottom = new Rectangle(centerX - hintWindowsSize2, size.Y - hintWindowsSize - borderMargin, hintWindowsSize, hintWindowsSize) + offset;
+                _rLeft = new Rectangle(borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
+                _rRight = new Rectangle(size.X - hintWindowsSize - borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
+                _rCenter = new Rectangle(centerX - hintWindowsSize2, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
+
+                // Hit test, and calculate the approximation for filled area when hovered over the hint
+                DockState toSet = DockState.Float;
+                if (showBorderHints)
+                {
+                    if (_rUpper.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockTop;
+                        hoveredHintControl = _dockHintUp;
+                        hoveredSizeOverride = new Float2(size.X, hintPreviewSize.Y);
+                    }
+                    else if (_rBottom.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockBottom;
+                        hoveredHintControl = _dockHintDown;
+                        hoveredSizeOverride = new Float2(size.X, hintPreviewSize.Y);
+                    }
+                    else if (_rLeft.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockLeft;
+                        hoveredHintControl = _dockHintLeft;
+                        hoveredSizeOverride = new Float2(hintPreviewSize.X, size.Y);
+                    }
+                    else if (_rRight.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockRight;
+                        hoveredHintControl = _dockHintRight;
+                        hoveredSizeOverride = new Float2(hintPreviewSize.X, size.Y);
+                    }
+                }
+                if (showCenterHint && _rCenter.Contains(_toDock.PointFromScreen(_mouse)))
+                {
+                    toSet = DockState.DockFill;
+                    hoveredHintControl = _dockHintCenter;
+                    hoveredSizeOverride = new Float2(size.X, size.Y);
+                }
+
+                _toSet = toSet;
+            }
+            else
+            {
+                _toSet = DockState.Float;
+            }
+            
+            // Update sizes and opacity of hint controls
+            if (_toDock != null)
+            {
+                if (hoveredHintControl != _dockHintDown)
+                {
+                    _dockHintDown.Size = new Float2(HintControlSize);
+                    _dockHintDown.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintLeft)
+                {
+                    _dockHintLeft.Size = new Float2(HintControlSize);
+                    _dockHintLeft.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintRight)
+                {
+                    _dockHintRight.Size = new Float2(HintControlSize);
+                    _dockHintRight.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintUp)
+                {
+                    _dockHintUp.Size = new Float2(HintControlSize);
+                    _dockHintUp.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintCenter)
+                {
+                    _dockHintCenter.Size = new Float2(HintControlSize);
+                    _dockHintCenter.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+
+                if (_toSet != DockState.Float)
+                {
+                    if (hoveredHintControl != null)
+                    {
+                        hoveredHintControl.BackgroundColor = Style.Current.Selection.AlphaMultiplied(1.0f);
+                        hoveredHintControl.Size = hoveredSizeOverride;
+                    }
+                }
+            }
+
+            // Update hint controls visibility and location
+            if (showProxyHints)
+            {
+                if (hoveredHintControl != _dockHintDown)
+                    _dockHintDown.Location = _rBottom.Location;
+                if (hoveredHintControl != _dockHintLeft)
+                    _dockHintLeft.Location = _rLeft.Location;
+                if (hoveredHintControl != _dockHintRight)
+                    _dockHintRight.Location = _rRight.Location;
+                if (hoveredHintControl != _dockHintUp)
+                    _dockHintUp.Location = _rUpper.Location;
+                if (hoveredHintControl != _dockHintCenter)
+                    _dockHintCenter.Location = _rCenter.Location;
+                
+                _dockHintDown.Visible = showProxyHints & showBorderHints;
+                _dockHintLeft.Visible = showProxyHints & showBorderHints;
+                _dockHintRight.Visible = showProxyHints & showBorderHints;
+                _dockHintUp.Visible = showProxyHints & showBorderHints;
+                _dockHintCenter.Visible = showProxyHints & showCenterHint;
+            }
+        }
+
+        private void OnMouseUp(ref Float2 location, MouseButton button, ref bool handled)
+        {
+            if (button == MouseButton.Left)
+                Dispose();
+        }
+
+        private void OnUpdate()
+        {
+            var mousePos = Platform.MousePosition;
+
+            if (_mouse != mousePos)
+                OnMouseMove(mousePos);
+        }
+        
+        private void OnMouseMove(Float2 mousePos)
+        {
+            if (_dragSourceWindow != null)
+                _toMove.Window.Window.Position = mousePos - _dragOffset;
+
+            UpdateRects(mousePos);
+        }
+    }
+}

Source/Editor/GUI/Input/ValueBox.cs

@@ -266,6 +266,7 @@ namespace FlaxEditor.GUI.Input
             return base.OnMouseDown(location, button);
         }
 
+#if !PLATFORM_SDL
         /// <inheritdoc />
         public override void OnMouseMove(Float2 location)
         {
@@ -292,13 +293,45 @@ namespace FlaxEditor.GUI.Input
             base.OnMouseMove(location);
         }
 
+#else
+
+        /// <inheritdoc />
+        public override void OnMouseMoveRelative(Float2 mouseMotion)
+        {
+            var location = Root.TrackingMouseOffset;
+            if (_isSliding)
+            {
+                // Update sliding
+                ApplySliding(Root.TrackingMouseOffset.X * _slideSpeed);
+                return;
+            }
+
+            // Update cursor type so user knows they can slide value
+            if (CanUseSliding && SlideRect.Contains(location) && !_isSliding)
+            {
+                Cursor = CursorType.SizeWE;
+                _cursorChanged = true;
+            }
+            else if (_cursorChanged && !_isSliding)
+            {
+                Cursor = CursorType.Default;
+                _cursorChanged = false;
+            }
+
+            base.OnMouseMoveRelative(mouseMotion);
+        }
+
+#endif
+
         /// <inheritdoc />
         public override bool OnMouseUp(Float2 location, MouseButton button)
         {
             if (button == MouseButton.Left && _isSliding)
             {
+#if !PLATFORM_SDL
                 // End sliding and return mouse to original location
                 RootWindow.MousePosition = _mouseClickedPosition;
+#endif
                 EndSliding();
                 return true;
             }

Source/Editor/GUI/MainMenu.cs

@@ -12,16 +12,6 @@ namespace FlaxEditor.GUI
     /// <seealso cref="FlaxEngine.GUI.ContainerControl" />
     public sealed class MainMenu : ContainerControl
     {
-#if PLATFORM_WINDOWS
-        private bool _useCustomWindowSystem;
-        private Image _icon;
-        private Label _title;
-        private Button _closeButton;
-        private Button _minimizeButton;
-        private Button _maximizeButton;
-        private LocalizedString _charChromeRestore, _charChromeMaximize;
-        private Window _window;
-#endif
         private MainMenuButton _selected;
 
         /// <summary>
@@ -60,200 +50,12 @@ namespace FlaxEditor.GUI
         /// <summary>
         /// Initializes a new instance of the <see cref="MainMenu"/> class.
         /// </summary>
-        /// <param name="mainWindow">The main window.</param>
-        public MainMenu(RootControl mainWindow)
+        public MainMenu()
         : base(0, 0, 0, 20)
         {
             AutoFocus = false;
             AnchorPreset = AnchorPresets.HorizontalStretchTop;
-
-#if PLATFORM_WINDOWS
-            _useCustomWindowSystem = !Editor.Instance.Options.Options.Interface.UseNativeWindowSystem;
-            if (_useCustomWindowSystem)
-            {
-                BackgroundColor = Style.Current.LightBackground;
-                Height = 28;
-
-                var windowIcon = FlaxEngine.Content.LoadAsyncInternal<Texture>(EditorAssets.WindowIcon);
-                FontAsset windowIconsFont = FlaxEngine.Content.LoadAsyncInternal<FontAsset>(EditorAssets.WindowIconsFont);
-                Font iconFont = windowIconsFont?.CreateFont(9);
-
-                _window = mainWindow.RootWindow.Window;
-                _window.HitTest += OnHitTest;
-                _window.Closed += OnWindowClosed;
-
-                ScriptsBuilder.GetBinariesConfiguration(out _, out _, out _, out var configuration);
-
-                _icon = new Image
-                {
-                    Margin = new Margin(6, 6, 6, 6),
-                    Brush = new TextureBrush(windowIcon),
-                    Color = Style.Current.Foreground,
-                    KeepAspectRatio = false,
-                    TooltipText = string.Format("{0}\nVersion {1}\nConfiguration {3}\nGraphics {2}", _window.Title, Globals.EngineVersion, GPUDevice.Instance.RendererType, configuration),
-                    Parent = this,
-                };
-
-                _title = new Label(0, 0, Width, Height)
-                {
-                    Text = _window.Title,
-                    HorizontalAlignment = TextAlignment.Center,
-                    VerticalAlignment = TextAlignment.Center,
-                    ClipText = true,
-                    TextColor = Style.Current.ForegroundGrey,
-                    TextColorHighlighted = Style.Current.ForegroundGrey,
-                    Parent = this,
-                };
-
-                _closeButton = new Button
-                {
-                    Text = ((char)EditorAssets.SegMDL2Icons.ChromeClose).ToString(),
-                    Font = new FontReference(iconFont),
-                    BackgroundColor = Color.Transparent,
-                    BorderColor = Color.Transparent,
-                    BorderColorHighlighted = Color.Transparent,
-                    BorderColorSelected = Color.Transparent,
-                    TextColor = Style.Current.Foreground,
-                    Width = 46,
-                    BackgroundColorHighlighted = Color.Red,
-                    BackgroundColorSelected = Color.Red.RGBMultiplied(1.3f),
-                    Parent = this,
-                };
-                _closeButton.Clicked += () => _window.Close(ClosingReason.User);
-
-                _minimizeButton = new Button
-                {
-                    Text = ((char)EditorAssets.SegMDL2Icons.ChromeMinimize).ToString(),
-                    Font = new FontReference(iconFont),
-                    BackgroundColor = Color.Transparent,
-                    BorderColor = Color.Transparent,
-                    BorderColorHighlighted = Color.Transparent,
-                    BorderColorSelected = Color.Transparent,
-                    TextColor = Style.Current.Foreground,
-                    Width = 46,
-                    BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
-                    Parent = this,
-                };
-                _minimizeButton.Clicked += () => _window.Minimize();
-
-                _maximizeButton = new Button
-                {
-                    Text = ((char)(_window.IsMaximized ? EditorAssets.SegMDL2Icons.ChromeRestore : EditorAssets.SegMDL2Icons.ChromeMaximize)).ToString(),
-                    Font = new FontReference(iconFont),
-                    BackgroundColor = Color.Transparent,
-                    BorderColor = Color.Transparent,
-                    BorderColorHighlighted = Color.Transparent,
-                    BorderColorSelected = Color.Transparent,
-                    TextColor = Style.Current.Foreground,
-                    Width = 46,
-                    BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
-                    Parent = this,
-                };
-                _maximizeButton.Clicked += () =>
-                {
-                    if (_window.IsMaximized)
-                        _window.Restore();
-                    else
-                        _window.Maximize();
-                };
-                _charChromeRestore = ((char)EditorAssets.SegMDL2Icons.ChromeRestore).ToString();
-                _charChromeMaximize = ((char)EditorAssets.SegMDL2Icons.ChromeMaximize).ToString();
-            }
-            else
-#endif
-            {
-                BackgroundColor = Style.Current.LightBackground;
-            }
-        }
-
-#if PLATFORM_WINDOWS
-        /// <inheritdoc />
-        public override void Update(float deltaTime)
-        {
-            base.Update(deltaTime);
-
-            if (_maximizeButton != null)
-            {
-                _maximizeButton.Text = _window.IsMaximized ? _charChromeRestore : _charChromeMaximize;
-            }
-        }
-
-        private void OnWindowClosed()
-        {
-            if (_window != null)
-            {
-                _window.HitTest = null;
-                _window = null;
-            }
-        }
-
-        private WindowHitCodes OnHitTest(ref Float2 mouse)
-        {
-            var dpiScale = _window.DpiScale;
-
-            if (_window.IsMinimized)
-                return WindowHitCodes.NoWhere;
-
-            if (!_window.IsMaximized)
-            {
-                var pos = _window.ScreenToClient(mouse * dpiScale); // pos is not DPI adjusted
-                var winSize = _window.Size;
-
-                // Distance from which the mouse is considered to be on the border/corner
-                float distance = 5.0f * dpiScale;
-
-                if (pos.Y > winSize.Y - distance && pos.X < distance)
-                    return WindowHitCodes.BottomLeft;
-
-                if (pos.X > winSize.X - distance && pos.Y > winSize.Y - distance)
-                    return WindowHitCodes.BottomRight;
-
-                if (pos.Y < distance && pos.X < distance)
-                    return WindowHitCodes.TopLeft;
-
-                if (pos.Y < distance && pos.X > winSize.X - distance)
-                    return WindowHitCodes.TopRight;
-
-                if (pos.X > winSize.X - distance)
-                    return WindowHitCodes.Right;
-
-                if (pos.X < distance)
-                    return WindowHitCodes.Left;
-
-                if (pos.Y < distance)
-                    return WindowHitCodes.Top;
-
-                if (pos.Y > winSize.Y - distance)
-                    return WindowHitCodes.Bottom;
-            }
-
-            var mousePos = PointFromScreen(mouse * dpiScale);
-            var controlUnderMouse = GetChildAt(mousePos);
-            var isMouseOverSth = controlUnderMouse != null && controlUnderMouse != _title;
-            var rb = GetRightButton();
-            if (rb != null && _minimizeButton != null && new Rectangle(rb.UpperRight, _minimizeButton.BottomLeft - rb.UpperRight).Contains(ref mousePos) && !isMouseOverSth)
-                return WindowHitCodes.Caption;
-
-            return WindowHitCodes.Client;
-        }
-#endif
-
-        /// <summary>
-        /// Return the rightmost button.
-        /// </summary>
-        /// <returns>Rightmost button, null if there is no <see cref="MainMenuButton"/></returns>
-        private MainMenuButton GetRightButton()
-        {
-            MainMenuButton b = null;
-            foreach (var control in Children)
-            {
-                if (b == null && control is MainMenuButton)
-                    b = (MainMenuButton)control;
-
-                if (control is MainMenuButton && control.Right > b.Right)
-                    b = (MainMenuButton)control;
-            }
-            return b;
+            BackgroundColor = Style.Current.LightBackground;
         }
 
         /// <summary>
@@ -298,26 +100,6 @@ namespace FlaxEditor.GUI
             return result;
         }
 
-        /// <inheritdoc />
-        public override bool OnMouseDoubleClick(Float2 location, MouseButton button)
-        {
-            if (base.OnMouseDoubleClick(location, button))
-                return true;
-
-#if PLATFORM_WINDOWS
-            var child = GetChildAtRecursive(location);
-            if (_useCustomWindowSystem && child is not Button && child is not MainMenuButton)
-            {
-                if (_window.IsMaximized)
-                    _window.Restore();
-                else
-                    _window.Maximize();
-            }
-#endif
-
-            return true;
-        }
-
         /// <inheritdoc />
         public override bool OnKeyDown(KeyboardKeys key)
         {
@@ -333,16 +115,8 @@ namespace FlaxEditor.GUI
         protected override void PerformLayoutAfterChildren()
         {
             float x = 0;
-
-#if PLATFORM_WINDOWS
-            if (_useCustomWindowSystem)
-            {
-                // Icon
-                _icon.X = x;
-                _icon.Size = new Float2(Height);
-                x += _icon.Width;
-            }
-#endif
+            WindowDecorations decorations = Parent.GetChild<WindowDecorations>();
+            x += decorations?.Icon?.Width ?? 0;
 
             // Arrange controls
             MainMenuButton rightMostButton = null;
@@ -361,37 +135,21 @@ namespace FlaxEditor.GUI
                     x += b.Width;
                 }
             }
-
-#if PLATFORM_WINDOWS
-            if (_useCustomWindowSystem)
-            {
-                // Buttons
-                _closeButton.Height = Height;
-                _closeButton.X = Width - _closeButton.Width;
-                _maximizeButton.Height = Height;
-                _maximizeButton.X = _closeButton.X - _maximizeButton.Width;
-                _minimizeButton.Height = Height;
-                _minimizeButton.X = _maximizeButton.X - _minimizeButton.Width;
-
-                // Title
-                _title.Bounds = new Rectangle(x + 2, 0, _minimizeButton.Left - x - 4, Height);
-                //_title.Text = _title.Width < 300.0f ? Editor.Instance.ProjectInfo.Name : _window.Title;
-            }
-#endif
+            
+            // Fill the right side if title and buttons are not present
+            if (decorations?.Title == null)
+                Width = Parent.Width;
+            else
+                Width = x;
         }
 
-#if PLATFORM_WINDOWS
         /// <inheritdoc />
         public override void OnDestroy()
         {
             base.OnDestroy();
-
-            if (_window != null)
-            {
-                _window.Closed -= OnWindowClosed;
-                OnWindowClosed();
-            }
+            
+            if (_selected != null)
+                Selected = null;
         }
-#endif
     }
 }

Source/Editor/GUI/MainMenuButton.cs

@@ -42,14 +42,12 @@ namespace FlaxEditor.GUI
             Text = text;
 
             var style = Style.Current;
-#if PLATFORM_WINDOWS
-            if (Editor.Instance.Options.Options.Interface.UseNativeWindowSystem)
+            if (!Utilities.Utils.UseCustomWindowDecorations())
             {
                 BackgroundColorMouseOver = style.BackgroundHighlighted;
                 BackgroundColorMouseOverOpened = style.Background;
             }
             else
-#endif
             {
                 BackgroundColorMouseOver = BackgroundColorMouseOverOpened = style.LightBackground * 1.3f;
             }

Source/Editor/GUI/WindowDecorations.cs

@@ -0,0 +1,342 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+using System;
+using FlaxEditor.GUI.Docking;
+using FlaxEditor.Options;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.GUI;
+
+/// <summary>
+/// Represents the title bar of the window with buttons.
+/// </summary>
+/// <seealso cref="FlaxEngine.GUI.ContainerControl" />
+public class WindowDecorations : ContainerControl
+{
+    private Image _icon;
+    private Label _title;
+    private Button _closeButton;
+    private Button _minimizeButton;
+    private Button _maximizeButton;
+    private LocalizedString _charChromeRestore, _charChromeMaximize;
+    private Window _window;
+
+    /// <summary>
+    /// The title label in the title bar.
+    /// </summary>
+    public Label Title => _title;
+    
+    /// <summary>
+    /// The icon used in the title bar.
+    /// </summary>
+    public Image Icon => _icon;
+    
+    /// <summary>
+    /// The tooltip shown when hovering over the icon.
+    /// </summary>
+    public string IconTooltipText
+    {
+        get => _icon?.TooltipText ?? null;
+        set
+        {
+            if (_icon != null)
+                _icon.TooltipText = value;
+        }
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="WindowDecorations"/> class.
+    /// </summary>
+    /// <param name="window">The window.</param>
+    /// <param name="iconOnly">When set, omit drawing title and buttons.</param>
+    public WindowDecorations(RootControl window, bool iconOnly = false)
+    : base(0, 0, 0, 20)
+    {
+        _window = window.RootWindow.Window;
+        
+        AutoFocus = false;
+        AnchorPreset = AnchorPresets.HorizontalStretchTop;
+        BackgroundColor = Color.Transparent;
+
+        var windowIcon = FlaxEngine.Content.LoadAsyncInternal<Texture>(EditorAssets.WindowIcon);
+
+        _icon = new Image
+        {
+            Margin = new Margin(4, 4, 4, 4),
+            Brush = new TextureBrush(windowIcon),
+            Color = Style.Current.Foreground,
+            BackgroundColor = Style.Current.LightBackground,
+            KeepAspectRatio = false,
+            Parent = this,
+        };
+
+        if (!iconOnly)
+        {
+            _icon.Margin = new Margin(6, 6, 6, 6);
+            Height = 28;
+            
+            _window.HitTest += OnHitTest;
+            _window.Closed += OnWindowClosed;
+            
+            FontAsset windowIconsFont = FlaxEngine.Content.LoadAsyncInternal<FontAsset>(EditorAssets.WindowIconsFont);
+            Font iconFont = windowIconsFont?.CreateFont(9);
+            
+            _title = new Label(0, 0, Width, Height)
+            {
+                Text = _window.Title,
+                HorizontalAlignment = TextAlignment.Center,
+                VerticalAlignment = TextAlignment.Center,
+                ClipText = true,
+                TextColor = Style.Current.ForegroundGrey,
+                TextColorHighlighted = Style.Current.ForegroundGrey,
+                BackgroundColor = Style.Current.LightBackground,
+                Parent = this,
+            };
+
+            _closeButton = new Button
+            {
+                Text = ((char)EditorAssets.SegMDL2Icons.ChromeClose).ToString(),
+                Font = new FontReference(iconFont),
+                BackgroundColor = Style.Current.LightBackground,
+                BorderColor = Color.Transparent,
+                BorderColorHighlighted = Color.Transparent,
+                BorderColorSelected = Color.Transparent,
+                TextColor = Style.Current.Foreground,
+                Width = 46,
+                BackgroundColorHighlighted = Color.Red,
+                BackgroundColorSelected = Color.Red.RGBMultiplied(1.3f),
+                Parent = this,
+            };
+            _closeButton.Clicked += () => _window.Close(ClosingReason.User);
+
+            _minimizeButton = new Button
+            {
+                Text = ((char)EditorAssets.SegMDL2Icons.ChromeMinimize).ToString(),
+                Font = new FontReference(iconFont),
+                BackgroundColor = Style.Current.LightBackground,
+                BorderColor = Color.Transparent,
+                BorderColorHighlighted = Color.Transparent,
+                BorderColorSelected = Color.Transparent,
+                TextColor = Style.Current.Foreground,
+                Width = 46,
+                BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
+                Parent = this,
+            };
+            _minimizeButton.Clicked += () => _window.Minimize();
+
+            _maximizeButton = new Button
+            {
+                Text = ((char)(_window.IsMaximized ? EditorAssets.SegMDL2Icons.ChromeRestore : EditorAssets.SegMDL2Icons.ChromeMaximize)).ToString(),
+                Font = new FontReference(iconFont),
+                BackgroundColor = Style.Current.LightBackground,
+                BorderColor = Color.Transparent,
+                BorderColorHighlighted = Color.Transparent,
+                BorderColorSelected = Color.Transparent,
+                TextColor = Style.Current.Foreground,
+                Width = 46,
+                BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
+                Parent = this,
+            };
+            _maximizeButton.Clicked += () =>
+            {
+                if (_window.IsMaximized)
+                    _window.Restore();
+                else
+                    _window.Maximize();
+            };
+
+            _charChromeRestore = ((char)EditorAssets.SegMDL2Icons.ChromeRestore).ToString();
+            _charChromeMaximize = ((char)EditorAssets.SegMDL2Icons.ChromeMaximize).ToString();
+        }
+    }
+    
+    /// <inheritdoc />
+    public override void Update(float deltaTime)
+    {
+        base.Update(deltaTime);
+
+        if (_maximizeButton != null)
+        {
+            var maximizeText = _window.IsMaximized ? _charChromeRestore : _charChromeMaximize;
+            if (_maximizeButton.Text != maximizeText)
+                _maximizeButton.Text = maximizeText;
+        }
+    }
+
+    private void OnWindowClosed()
+    {
+        if (_window != null)
+        {
+            _window.HitTest -= OnHitTest;
+            _window = null;
+        }
+    }
+
+    /// <summary>
+    /// Perform hit test on the window.
+    /// </summary>
+    /// <param name="mouse">The mouse position</param>
+    /// <returns>The hit code for given position.</returns>
+    protected virtual WindowHitCodes OnHitTest(ref Float2 mouse)
+    {
+        if (_window.IsMinimized)
+            return WindowHitCodes.NoWhere;
+
+        var dpiScale = _window.DpiScale;
+        var pos = _window.ScreenToClient(mouse * dpiScale); // pos is not DPI adjusted
+        if (!_window.IsMaximized)
+        {
+            var winSize = _window.Size;
+
+            // Distance from which the mouse is considered to be on the border/corner
+            float distance = 5.0f * dpiScale;
+
+            if (pos.Y > winSize.Y - distance && pos.X < distance)
+                return WindowHitCodes.BottomLeft;
+
+            if (pos.X > winSize.X - distance && pos.Y > winSize.Y - distance)
+                return WindowHitCodes.BottomRight;
+
+            if (pos.Y < distance && pos.X < distance)
+                return WindowHitCodes.TopLeft;
+
+            if (pos.Y < distance && pos.X > winSize.X - distance)
+                return WindowHitCodes.TopRight;
+
+            if (pos.X > winSize.X - distance)
+                return WindowHitCodes.Right;
+
+            if (pos.X < distance)
+                return WindowHitCodes.Left;
+
+            if (pos.Y < distance)
+                return WindowHitCodes.Top;
+
+            if (pos.Y > winSize.Y - distance)
+                return WindowHitCodes.Bottom;
+        }
+        
+        var controlUnderMouse = GetChildAt(pos, control => control != _title);
+        if (_title.Bounds.Contains(pos) && controlUnderMouse == null)
+            return WindowHitCodes.Caption;
+
+        return WindowHitCodes.Client;
+    }
+    
+    /// <inheritdoc />
+    public override bool OnMouseDoubleClick(Float2 location, MouseButton button)
+    {
+        // These may not work with main window due to SDL not passing mouse events
+        // when interacting with hit tests on caption area...
+        
+        if (Title.Bounds.Contains(location) && button == MouseButton.Left)
+        {
+            if (_window.IsMaximized)
+                _window.Restore();
+            else
+                _window.Maximize();
+            return true;
+        }
+        else if (Icon.Bounds.Contains(location) && button == MouseButton.Left)
+        {
+            _window.Close(ClosingReason.User);
+            return true;
+        }
+        return base.OnMouseDoubleClick(location, button);
+    }
+
+    /// <inheritdoc />
+    protected override void PerformLayoutAfterChildren()
+    {
+        // Calculate extents for title bounds area excluding the icon and main menu area
+        float x = 0;
+        
+        // Icon
+        if (_icon != null)
+        {
+            _icon.X = x;
+            _icon.Size = new Float2(Height);
+            x += _icon.Width;
+        }
+
+        // Main menu if present
+        if (Parent.GetChild<MainMenu>() is MainMenu mainMenu)
+        {
+            for (int i = 0; i < mainMenu.Children.Count; i++)
+            {
+                var c = mainMenu.Children[i];
+                if (c is MainMenuButton b && c.Visible)
+                {
+                    b.Bounds = new Rectangle(x, 0, b.Width, Height);
+                    x += b.Width;
+                }
+            }
+        }
+     
+        // Buttons
+        float rightMostButtonX = Width;
+        if (_closeButton != null)
+        {
+            _closeButton.Height = Height;
+            _closeButton.X = rightMostButtonX - _closeButton.Width;
+            rightMostButtonX = _closeButton.X;
+        }
+        if (_maximizeButton != null)
+        {
+            _maximizeButton.Height = Height;
+            _maximizeButton.X = rightMostButtonX - _maximizeButton.Width;
+            rightMostButtonX = _maximizeButton.X;
+        }
+        if (_minimizeButton != null)
+        {
+            _minimizeButton.Height = Height;
+            _minimizeButton.X = rightMostButtonX - _minimizeButton.Width;
+            rightMostButtonX = _minimizeButton.X;
+        }
+
+        // Title
+        if (_title != null)
+        {
+            _title.Text = _window.Title;
+            _title.Bounds = new Rectangle(x, 0, rightMostButtonX - x, Height);
+        }
+    }
+    
+    /// <inheritdoc />
+    public override void Draw()
+    {
+        base.Draw();
+        DrawBorders();
+    }
+
+    /// <summary>
+    /// Draw borders around the window.
+    /// </summary>
+    public virtual void DrawBorders()
+    {
+        var win = RootWindow.Window;
+        if (win.IsMaximized)
+            return;
+
+        if (Editor.Instance.UI.StatusBar == null)
+            return;
+        
+        const float thickness = 1.0f;
+        Color color = Editor.Instance.UI.StatusBar.StatusColor;
+        Rectangle rect = new Rectangle(thickness * 0.5f, thickness * 0.5f, Parent.Width - thickness, Parent.Height - thickness);
+        Render2D.DrawRectangle(rect, color);
+    }
+
+    /// <inheritdoc />
+    public override void OnDestroy()
+    {
+        base.OnDestroy();
+
+        if (_window != null)
+        {
+            _window.Closed -= OnWindowClosed;
+            OnWindowClosed();
+        }
+    }
+}

Source/Editor/Managed/ManagedEditor.Internal.cpp

@@ -402,10 +402,11 @@ DEFINE_INTERNAL_CALL(void) EditorInternal_RunVisualScriptBreakpointLoopTick(floa
                 break;
             }
         }
+        WindowsManager::WindowsLocker.Unlock();
         for (const auto& e : inputEvents)
         {
             auto window = e.Target ? e.Target : defaultWindow;
-            if (!window)
+            if (!window || window->IsClosed())
                 continue;
             switch (e.Type)
             {
@@ -435,12 +436,14 @@ DEFINE_INTERNAL_CALL(void) EditorInternal_RunVisualScriptBreakpointLoopTick(floa
             case InputDevice::EventType::MouseMove:
                 window->OnMouseMove(window->ScreenToClient(e.MouseData.Position));
                 break;
+            case InputDevice::EventType::MouseMoveRelative:
+                window->OnMouseMoveRelative(e.MouseMovementData.PositionRelative);
+                break;
             case InputDevice::EventType::MouseLeave:
                 window->OnMouseLeave();
                 break;
             }
         }
-        WindowsManager::WindowsLocker.Unlock();
     }
     WindowsManager::WindowsLocker.Lock();
     Array<Window*, InlinedAllocation<32>> windows;

Source/Editor/Managed/ManagedEditor.cpp

@@ -13,6 +13,7 @@
 #include "Engine/Scripting/Internal/MainThreadManagedInvokeAction.h"
 #include "Engine/Content/Assets/VisualScript.h"
 #include "Engine/Content/Content.h"
+#include "Engine/Level/Actor.h"
 #include "Engine/CSG/CSGBuilder.h"
 #include "Engine/Engine/CommandLine.h"
 #include "Engine/Renderer/ProbesRenderer.h"
@@ -74,7 +75,7 @@ void OnLightmapsBuildFinished(bool failed)
         OnLightmapsBake(ShadowsOfMordor::BuildProgressStep::GenerateLightmapCharts, 0, 0, false);
 }
 
-void OnBakeEvent(bool started, const ProbesRenderer::Entry& e)
+void OnBakeEvent(bool started, Actor* e)
 {
     if (Internal_EnvProbeBake == nullptr)
     {
@@ -82,7 +83,7 @@ void OnBakeEvent(bool started, const ProbesRenderer::Entry& e)
         ASSERT(Internal_EnvProbeBake);
     }
 
-    MObject* probeObj = e.Actor ? e.Actor->GetManagedInstance() : nullptr;
+    MObject* probeObj = e ? e->GetManagedInstance() : nullptr;
 
     MainThreadManagedInvokeAction::ParamsBuilder params;
     params.AddParam(started);
@@ -90,12 +91,12 @@ void OnBakeEvent(bool started, const ProbesRenderer::Entry& e)
     MainThreadManagedInvokeAction::Invoke(Internal_EnvProbeBake, params);
 }
 
-void OnRegisterBake(const ProbesRenderer::Entry& e)
+void OnRegisterBake(Actor* e)
 {
     OnBakeEvent(true, e);
 }
 
-void OnFinishBake(const ProbesRenderer::Entry& e)
+void OnFinishBake(Actor* e)
 {
     OnBakeEvent(false, e);
 }
@@ -156,7 +157,9 @@ ManagedEditor::ManagedEditor()
     lightmapsBuilder->OnBuildProgress.Bind<OnLightmapsBuildProgress>();
     lightmapsBuilder->OnBuildFinished.Bind<OnLightmapsBuildFinished>();
     CSG::Builder::OnBrushModified.Bind<OnBrushModified>();
+#if LOG_ENABLE
     Log::Logger::OnMessage.Bind<OnLogMessage>();
+#endif
     VisualScripting::DebugFlow.Bind<OnVisualScriptingDebugFlow>();
 }
 
@@ -172,7 +175,9 @@ ManagedEditor::~ManagedEditor()
     lightmapsBuilder->OnBuildProgress.Unbind<OnLightmapsBuildProgress>();
     lightmapsBuilder->OnBuildFinished.Unbind<OnLightmapsBuildFinished>();
     CSG::Builder::OnBrushModified.Unbind<OnBrushModified>();
+#if LOG_ENABLE
     Log::Logger::OnMessage.Unbind<OnLogMessage>();
+#endif
     VisualScripting::DebugFlow.Unbind<OnVisualScriptingDebugFlow>();
 }
 

Source/Editor/Modules/ContentDatabaseModule.cs

@@ -1013,7 +1013,7 @@ namespace FlaxEditor.Modules
                     ContentItem item;
                     if (path.EndsWith(".cs"))
                         item = new CSharpScriptItem(path);
-                    else if (path.EndsWith(".cpp") || path.EndsWith(".h"))
+                    else if (path.EndsWith(".cpp") || path.EndsWith(".h") || path.EndsWith(".c") || path.EndsWith(".hpp"))
                         item = new CppScriptItem(path);
                     else if (path.EndsWith(".shader") || path.EndsWith(".hlsl"))
                         item = new ShaderSourceItem(path);

Source/Editor/Modules/ContentImportingModule.cs

@@ -222,7 +222,7 @@ namespace FlaxEditor.Modules
                 outputExtension = extension;
 
                 // Check if can place source files here
-                if (!targetLocation.CanHaveScripts && (extension == ".cs" || extension == ".cpp" || extension == ".h"))
+                if (!targetLocation.CanHaveScripts && (extension == ".cs" || extension == ".cpp" || extension == ".h" || extension == ".c" || extension == ".hpp"))
                 {
                     // Error
                     Editor.LogWarning(string.Format("Cannot import \'{0}\' to \'{1}\'. The target directory cannot have scripts.", inputPath, targetLocation.Node.Path));

Source/Editor/Modules/SceneEditingModule.cs

@@ -711,7 +711,11 @@ namespace FlaxEditor.Modules
 
         private void OnActorChildNodesDispose(ActorNode node)
         {
+            if (Selection.Count == 0)
+                return;
+
             // TODO: cache if selection contains any actor child node and skip this loop if no need to iterate
+            // TODO: or build a hash set with selected nodes for quick O(1) checks (cached until selection changes)
 
             // Deselect child nodes
             for (int i = 0; i < node.ChildNodes.Count; i++)

Source/Editor/Modules/SceneModule.cs

@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using FlaxEditor.SceneGraph;
 using FlaxEditor.SceneGraph.Actors;
 using FlaxEngine;
@@ -658,6 +659,48 @@ namespace FlaxEditor.Modules
             //node?.TreeNode.OnActiveChanged();
         }
 
+        private void OnActorDestroyChildren(Actor actor)
+        {
+            // Instead of doing OnActorParentChanged for every child lets remove all of them at once from that actor
+            ActorNode node = GetActorNode(actor);
+            if (node != null)
+            {
+                if (Editor.SceneEditing.HasSthSelected)
+                {
+                    // Clear selection if one of the removed actors is selected
+                    var selection = new HashSet<Actor>();
+                    foreach (var e in Editor.SceneEditing.Selection)
+                    {
+                        if (e is ActorNode q && q.Actor)
+                            selection.Add(q.Actor);
+                    }
+                    var count = actor.ChildrenCount;
+                    for (int i = 0; i < count; i++)
+                    {
+                        var child = actor.GetChild(i);
+                        if (selection.Contains(child))
+                        {
+                            Editor.SceneEditing.Deselect();
+                            break;
+                        }
+                    }
+                }
+
+                // Remove all child nodes (upfront remove all nodes to run faster)
+                for (int i = 0; i < node.ChildNodes.Count; i++)
+                {
+                    if (node.ChildNodes[i] is ActorNode child)
+                        child.parentNode = null;
+                }
+                node.TreeNode.DisposeChildren();
+                for (int i = 0; i < node.ChildNodes.Count; i++)
+                {
+                    node.ChildNodes[i].Dispose();
+                }
+                node.ChildNodes.Clear();
+            }
+        }
+
         /// <summary>
         /// Gets the actor node.
         /// </summary>
@@ -709,6 +752,7 @@ namespace FlaxEditor.Modules
             Level.ActorOrderInParentChanged += OnActorOrderInParentChanged;
             Level.ActorNameChanged += OnActorNameChanged;
             Level.ActorActiveChanged += OnActorActiveChanged;
+            Level.ActorDestroyChildren += OnActorDestroyChildren;
         }
 
         /// <inheritdoc />
@@ -726,6 +770,7 @@ namespace FlaxEditor.Modules
             Level.ActorOrderInParentChanged -= OnActorOrderInParentChanged;
             Level.ActorNameChanged -= OnActorNameChanged;
             Level.ActorActiveChanged -= OnActorActiveChanged;
+            Level.ActorDestroyChildren -= OnActorDestroyChildren;
 
             // Cleanup graph
             Root.Dispose();

Source/Editor/Modules/SimulationModule.cs

@@ -267,7 +267,7 @@ namespace FlaxEditor.Modules
         }
 
         /// <inheritdoc />
-        public override void OnPlayBegin()
+        public override void OnPlayBeginning()
         {
             Editor.Windows.FlashMainWindow();
 

Source/Editor/Modules/UIModule.cs

@@ -16,7 +16,6 @@ using FlaxEditor.Windows;
 using FlaxEngine;
 using FlaxEngine.GUI;
 using FlaxEngine.Json;
-using DockHintWindow = FlaxEditor.GUI.Docking.DockHintWindow;
 using MasterDockPanel = FlaxEditor.GUI.Docking.MasterDockPanel;
 using FlaxEditor.Content.Settings;
 using FlaxEditor.Options;
@@ -29,6 +28,40 @@ namespace FlaxEditor.Modules
     /// <seealso cref="FlaxEditor.Modules.EditorModule" />
     public sealed class UIModule : EditorModule
     {
+        private class MainWindowDecorations : WindowDecorations
+        {
+            public MainWindowDecorations(RootControl window, bool iconOnly) 
+            : base(window, iconOnly)
+            {
+            }
+
+            /// <inheritdoc />
+            public override bool OnKeyDown(KeyboardKeys key)
+            {
+                if (base.OnKeyDown(key))
+                    return true;
+
+                // Fallback to the edit window for shortcuts
+                var editor = Editor.Instance;
+                return editor.Windows.EditWin.InputActions.Process(editor, this, key);
+            }
+            
+            /// <inheritdoc />
+            public override void DrawBorders()
+            {
+                // Draw main window borders if using a custom style
+                var win = RootWindow.Window;
+                if (win.IsMaximized)
+                    return;
+
+                var color = Editor.Instance.UI.StatusBar.StatusColor;
+                var rect = new Rectangle(0.5f, 0.5f, Parent.Width - 1.0f, Parent.Height - 1.0f - StatusBar.DefaultHeight);
+                Render2D.DrawLine(rect.UpperLeft, rect.UpperRight, color);
+                Render2D.DrawLine(rect.UpperLeft, rect.BottomLeft, color);
+                Render2D.DrawLine(rect.UpperRight, rect.BottomRight, color);
+            }
+        }
+        
         private Label _progressLabel;
         private ProgressBar _progressBar;
         private Button _outputLogButton;
@@ -97,6 +130,11 @@ namespace FlaxEditor.Modules
         /// </summary>
         public MainMenu MainMenu;
 
+        /// <summary>
+        /// The window decorations (title bar with buttons)
+        /// </summary>
+        public WindowDecorations WindowDecorations;
+
         /// <summary>
         /// The tool strip control.
         /// </summary>
@@ -377,19 +415,11 @@ namespace FlaxEditor.Modules
             InitToolstrip(mainWindow);
             InitStatusBar(mainWindow);
             InitDockPanel(mainWindow);
+            InitWindowDecorations(mainWindow);
 
             Editor.Options.OptionsChanged += OnOptionsChanged;
-
-            // Add dummy control for drawing the main window borders if using a custom style
-#if PLATFORM_WINDOWS
-            if (!Editor.Options.Options.Interface.UseNativeWindowSystem)
-#endif
-            {
-                mainWindow.AddChild(new CustomWindowBorderControl
-                {
-                    Size = Float2.Zero,
-                });
-            }
+            
+            mainWindow.PerformLayout(true);
         }
 
         /// <inheritdoc />
@@ -410,23 +440,6 @@ namespace FlaxEditor.Modules
             }
         }
 
-        private class CustomWindowBorderControl : Control
-        {
-            /// <inheritdoc />
-            public override void Draw()
-            {
-                var win = RootWindow.Window;
-                if (win.IsMaximized)
-                    return;
-
-                var color = Editor.Instance.UI.StatusBar.StatusColor;
-                var rect = new Rectangle(0.5f, 0.5f, Parent.Width - 1.0f, Parent.Height - 1.0f - StatusBar.DefaultHeight);
-                Render2D.DrawLine(rect.UpperLeft, rect.UpperRight, color);
-                Render2D.DrawLine(rect.UpperLeft, rect.BottomLeft, color);
-                Render2D.DrawLine(rect.UpperRight, rect.BottomRight, color);
-            }
-        }
-
         /// <inheritdoc />
         public override void OnEndInit()
         {
@@ -458,13 +471,6 @@ namespace FlaxEditor.Modules
             UpdateToolstrip();
         }
 
-        /// <inheritdoc />
-        public override void OnExit()
-        {
-            // Cleanup dock panel hint proxy windows (Flax will destroy them by var but it's better to clear them earlier)
-            DockHintWindow.Proxy.Dispose();
-        }
-
         private IColorPickerDialog ShowPickColorDialog(Control targetControl, Color initialValue, ColorValueBox.ColorPickerEvent colorChanged, ColorValueBox.ColorPickerClosedEvent pickerClosed, bool useDynamicEditing)
         {
             var dialog = new ColorPickerDialog(initialValue, colorChanged, pickerClosed, useDynamicEditing);
@@ -518,10 +524,12 @@ namespace FlaxEditor.Modules
 
         private void InitMainMenu(RootControl mainWindow)
         {
-            MainMenu = new MainMenu(mainWindow)
+            MainMenu = new MainMenu()
             {
                 Parent = mainWindow
             };
+            if (Utilities.Utils.UseCustomWindowDecorations(isMainWindow: true))
+                MainMenu.Height = 28;
 
             var inputOptions = Editor.Options.Options.Input;
 
@@ -661,6 +669,20 @@ namespace FlaxEditor.Modules
             cm.AddButton("Information about Flax", () => new AboutDialog().Show());
         }
 
+        private void InitWindowDecorations(RootControl mainWindow)
+        {
+            ScriptsBuilder.GetBinariesConfiguration(out _, out _, out _, out var configuration);
+            var driver = Platform.DisplayServer;
+            if (!string.IsNullOrEmpty(driver))
+                driver = $" ({driver})";
+            
+            WindowDecorations = new MainWindowDecorations(mainWindow, !Utilities.Utils.UseCustomWindowDecorations(isMainWindow: true))
+            {
+                Parent = mainWindow,
+                IconTooltipText = $"{mainWindow.RootWindow.Title}\nVersion {Globals.EngineVersion}\nConfiguration {configuration}\nGraphics {GPUDevice.Instance.RendererType}{driver}",
+            };
+        }
+        
         private void OnOptionsChanged(EditorOptions options)
         {
             var inputOptions = options.Input;
@@ -1070,6 +1092,7 @@ namespace FlaxEditor.Modules
         {
             // Clear UI references (GUI cannot be used after window closing)
             MainMenu = null;
+            WindowDecorations = null;
             ToolStrip = null;
             MasterPanel = null;
             StatusBar = null;

Source/Editor/Modules/WindowsModule.cs

@@ -10,7 +10,6 @@ using System.Text;
 using System.Xml;
 using FlaxEditor.Content;
 using FlaxEditor.GUI.Dialogs;
-using FlaxEditor.GUI.Docking;
 using FlaxEditor.Windows;
 using FlaxEditor.Windows.Assets;
 using FlaxEditor.Windows.Profiler;
@@ -758,17 +757,19 @@ namespace FlaxEditor.Modules
             var settings = CreateWindowSettings.Default;
             settings.Title = "Flax Editor";
             settings.Size = Platform.DesktopSize * 0.75f;
+            settings.MinimumSize = new Float2(200, 150);
             settings.StartPosition = WindowStartPosition.CenterScreen;
             settings.ShowAfterFirstPaint = true;
-#if PLATFORM_WINDOWS
-            if (!Editor.Instance.Options.Options.Interface.UseNativeWindowSystem)
+            
+            if (Utilities.Utils.UseCustomWindowDecorations(isMainWindow: true))
             {
                 settings.HasBorder = false;
-
+#if PLATFORM_WINDOWS && !PLATFORM_SDL
                 // Skip OS sizing frame and implement it using LeftButtonHit
                 settings.HasSizingFrame = false;
+#endif
             }
-#elif PLATFORM_LINUX
+#if PLATFORM_LINUX && !PLATFORM_SDL
             settings.HasBorder = false;
 #endif
             MainWindow = Platform.CreateWindow(ref settings);

Source/Editor/Options/InterfaceOptions.cs

@@ -160,21 +160,47 @@ namespace FlaxEditor.Options
             GameWindowThenRestore,
         }
 
+        /// <summary>
+        /// Options for type of window decorations to use.
+        /// </summary>
+        public enum WindowDecorationsType
+        {
+            /// <summary>
+            /// Determined automatically based on the system and any known compatibility issues with native decorations.
+            /// </summary>
+            Auto,
+            
+            /// <summary>
+            /// Automatically choose most compatible window decorations for child windows, prefer custom decorations on main window.
+            /// </summary>
+            [EditorDisplay(Name = "Auto (Child Only)")]
+            AutoChildOnly,
+            
+            /// <summary>
+            /// Use native system window decorations on all windows.
+            /// </summary>
+            Native,
+            
+            /// <summary>
+            /// Use custom client-side window decorations on all windows.
+            /// </summary>
+            [EditorDisplay(Name = "Client-side")]
+            ClientSide,
+        }
+
         /// <summary>
         /// Gets or sets the Editor User Interface scale. Applied to all UI elements, windows and text. Can be used to scale the interface up on a bigger display. Editor restart required.
         /// </summary>
         [DefaultValue(1.0f), Limit(0.1f, 10.0f)]
         [EditorDisplay("Interface"), EditorOrder(10), Tooltip("Editor User Interface scale. Applied to all UI elements, windows and text. Can be used to scale the interface up on a bigger display. Editor restart required.")]
         public float InterfaceScale { get; set; } = 1.0f;
-
-#if PLATFORM_WINDOWS
+        
         /// <summary>
-        /// Gets or sets a value indicating whether use native window title bar. Editor restart required.
+        /// Gets or sets a value indicating whether use native window title bar decorations in child windows. Editor restart required.
         /// </summary>
-        [DefaultValue(false)]
-        [EditorDisplay("Interface"), EditorOrder(70), Tooltip("Determines whether use native window title bar. Editor restart required.")]
-        public bool UseNativeWindowSystem { get; set; } = false;
-#endif
+        [DefaultValue(WindowDecorationsType.AutoChildOnly)]
+        [EditorDisplay("Interface"), EditorOrder(70), Tooltip("Determines whether use native window title bar decorations. Editor restart required.")]
+        public WindowDecorationsType WindowDecorations { get; set; } = WindowDecorationsType.AutoChildOnly;
 
         /// <summary>
         /// Gets or sets a value indicating whether show selected camera preview in the editor window.

Source/Editor/ProjectInfo.cpp

@@ -6,6 +6,7 @@
 #include "Engine/Core/Log.h"
 #include "Engine/Engine/Globals.h"
 #include "Engine/Core/Math/Quaternion.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Serialization/JsonWriters.h"
 #include "Engine/Serialization/JsonTools.h"
 #include <ThirdParty/pugixml/pugixml.hpp>
@@ -327,6 +328,7 @@ ProjectInfo* ProjectInfo::Load(const String& path)
     }
 
     // Load
+    PROFILE_MEM(Editor);
     auto project = New<ProjectInfo>();
     if (project->LoadProject(path))
     {

Source/Editor/SceneGraph/SceneGraphNode.cs

@@ -27,7 +27,7 @@ namespace FlaxEditor.SceneGraph
         /// <summary>
         /// The parent node.
         /// </summary>
-        protected SceneGraphNode parentNode;
+        internal SceneGraphNode parentNode;
 
         /// <summary>
         /// Gets the children list.

Source/Editor/Scripting/CodeEditor.cpp

@@ -13,6 +13,7 @@
 #include "Engine/Engine/EngineService.h"
 #include "Engine/Platform/Thread.h"
 #include "Engine/Threading/IRunnable.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 
 void OnAsyncBegin(Thread* thread);
 void OnAsyncEnd();
@@ -232,6 +233,8 @@ void OnAsyncEnd()
 
 bool CodeEditingManagerService::Init()
 {
+    PROFILE_MEM(Editor);
+
     // Try get editors
 #if USE_VISUAL_STUDIO_DTE
     VisualStudioEditor::FindEditors(&CodeEditors);

Source/Editor/Scripting/ScriptsBuilder.cpp

@@ -23,6 +23,7 @@
 #include "Engine/Scripting/Scripting.h"
 #include "Engine/Scripting/Script.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Level/Level.h"
 #include "FlaxEngine.Gen.h"
 
@@ -77,7 +78,7 @@ namespace ScriptsBuilderImpl
     void onScriptsReloadEnd();
     void onScriptsLoaded();
 
-    void GetClassName(const StringAnsi& fullname, StringAnsi& className);
+    void GetClassName(const StringAnsiView fullname, StringAnsi& className);
 
     void onCodeEditorAsyncOpenBegin()
     {
@@ -120,9 +121,13 @@ void ScriptsBuilderImpl::sourceDirEvent(const String& path, FileSystemAction act
     // Discard non-source files or generated files
     if ((!path.EndsWith(TEXT(".cs")) &&
         !path.EndsWith(TEXT(".cpp")) &&
+        !path.EndsWith(TEXT(".c")) &&
+        !path.EndsWith(TEXT(".hpp")) &&
         !path.EndsWith(TEXT(".h"))) ||
         path.EndsWith(TEXT(".Gen.cs")))
+    {
         return;
+    }
 
     ScopeLock scopeLock(_locker);
     _lastSourceCodeEdited = DateTime::Now();
@@ -272,7 +277,7 @@ bool ScriptsBuilder::GenerateProject(const StringView& customArgs)
     return RunBuildTool(args);
 }
 
-void ScriptsBuilderImpl::GetClassName(const StringAnsi& fullname, StringAnsi& className)
+void ScriptsBuilderImpl::GetClassName(const StringAnsiView fullname, StringAnsi& className)
 {
     const auto lastDotIndex = fullname.FindLast('.');
     if (lastDotIndex != -1)
@@ -413,6 +418,7 @@ void ScriptsBuilder::GetBinariesConfiguration(const Char*& target, const Char*&
 
 bool ScriptsBuilderImpl::compileGameScriptsAsyncInner()
 {
+    PROFILE_MEM(Editor);
     LOG(Info, "Starting scripts compilation...");
     CallEvent(EventType::CompileStarted);
 
@@ -519,6 +525,8 @@ void ScriptsBuilderImpl::onEditorAssemblyUnloading(MAssembly* assembly)
 
 bool ScriptsBuilderImpl::compileGameScriptsAsync()
 {
+    PROFILE_MEM(Editor);
+
     // Start
     {
         ScopeLock scopeLock(_locker);
@@ -562,6 +570,7 @@ bool ScriptsBuilderService::Init()
     // Check flag
     if (_isInited)
         return false;
+    PROFILE_MEM(Editor);
     _isInited = true;
 
     // Link for Editor assembly unload event to clear cached Internal_OnCompilationEnd to prevent errors
@@ -659,6 +668,9 @@ bool ScriptsBuilderService::Init()
 
 void ScriptsBuilderService::Update()
 {
+    PROFILE_CPU();
+    PROFILE_MEM(Editor);
+
     // Send compilation events
     {
         ScopeLock scopeLock(_compileEventsLocker);

Source/Editor/Surface/Archetypes/Material.cs

@@ -6,6 +6,7 @@ using FlaxEditor.Scripting;
 using FlaxEditor.Surface.Elements;
 using FlaxEditor.Windows.Assets;
 using FlaxEngine;
+using FlaxEngine.GUI;
 
 namespace FlaxEditor.Surface.Archetypes
 {
@@ -123,7 +124,8 @@ namespace FlaxEditor.Surface.Archetypes
                 case MaterialDomain.Particle:
                 case MaterialDomain.Deformable:
                 {
-                    bool isNotUnlit = info.ShadingModel != MaterialShadingModel.Unlit;
+                    bool isNotUnlit = info.ShadingModel != MaterialShadingModel.Unlit && info.ShadingModel != MaterialShadingModel.CustomLit;
+                    bool isOpaque = info.BlendMode == MaterialBlendMode.Opaque;
                     bool withTess = info.TessellationMode != TessellationMethod.None;
 
                     GetBox(MaterialNodeBoxes.Color).IsActive = isNotUnlit;
@@ -134,8 +136,8 @@ namespace FlaxEditor.Surface.Archetypes
                     GetBox(MaterialNodeBoxes.Roughness).IsActive = isNotUnlit;
                     GetBox(MaterialNodeBoxes.AmbientOcclusion).IsActive = isNotUnlit;
                     GetBox(MaterialNodeBoxes.Normal).IsActive = isNotUnlit;
-                    GetBox(MaterialNodeBoxes.Opacity).IsActive = info.ShadingModel == MaterialShadingModel.Subsurface || info.ShadingModel == MaterialShadingModel.Foliage || info.BlendMode != MaterialBlendMode.Opaque;
-                    GetBox(MaterialNodeBoxes.Refraction).IsActive = info.BlendMode != MaterialBlendMode.Opaque;
+                    GetBox(MaterialNodeBoxes.Opacity).IsActive = info.ShadingModel == MaterialShadingModel.Subsurface || info.ShadingModel == MaterialShadingModel.Foliage || !isOpaque;
+                    GetBox(MaterialNodeBoxes.Refraction).IsActive = !isOpaque;
                     GetBox(MaterialNodeBoxes.PositionOffset).IsActive = true;
                     GetBox(MaterialNodeBoxes.TessellationMultiplier).IsActive = withTess;
                     GetBox(MaterialNodeBoxes.WorldDisplacement).IsActive = withTess;
@@ -260,6 +262,211 @@ namespace FlaxEditor.Surface.Archetypes
             }
         }
 
+#if false // TODO: finish code editor based on RichTextBoxBase with text block parsing for custom styling
+        internal sealed class CustomCodeTextBox : RichTextBoxBase
+        {
+            protected override void OnParseTextBlocks()
+            {
+                base.OnParseTextBlocks();
+
+                // Single block for a whole text
+                // TODO: implement code parsing with HLSL syntax
+                var font = Style.Current.FontMedium;
+                var style = new TextBlockStyle
+                {
+                    Font = new FontReference(font),
+                    Color = Style.Current.Foreground,
+                    BackgroundSelectedBrush = new SolidColorBrush(Style.Current.BackgroundSelected),
+                };
+                _textBlocks.Clear();
+                _textBlocks.Add(new TextBlock
+                {
+                    Range = new TextRange
+                    {
+                        StartIndex = 0,
+                        EndIndex = TextLength,
+                    },
+                    Style = style,
+                    Bounds = new Rectangle(Float2.Zero, font.MeasureText(Text)),
+                });
+            }
+#else
+        internal sealed class CustomCodeTextBox : TextBox
+        {
+#endif
+            public override void Draw()
+            {
+                base.Draw();
+
+                // Draw border
+                if (!IsFocused)
+                    Render2D.DrawRectangle(new Rectangle(Float2.Zero, Size), Style.Current.BorderNormal);
+            }
+        }
+
+        internal sealed class CustomCodeNode : SurfaceNode
+        {
+            private Rectangle _resizeButtonRect;
+            private Float2 _startResizingSize;
+            private Float2 _startResizingCornerOffset;
+            private bool _isResizing;
+            private CustomCodeTextBox _textBox;
+
+            private int SizeValueIndex => Archetype.TypeID == 8 ? 1 : 3; // Index of the Size stored in Values array
+
+            private Float2 SizeValue
+            {
+                get => (Float2)Values[SizeValueIndex];
+                set => SetValue(SizeValueIndex, value, false);
+            }
+
+            public CustomCodeNode(uint id, VisjectSurfaceContext context, NodeArchetype nodeArch, GroupArchetype groupArch)
+            : base(id, context, nodeArch, groupArch)
+            {
+                Float2 pos = new Float2(FlaxEditor.Surface.Constants.NodeMarginX, FlaxEditor.Surface.Constants.NodeMarginY + FlaxEditor.Surface.Constants.NodeHeaderSize), size;
+                if (nodeArch.TypeID == 8)
+                {
+                    pos += new Float2(60, 0);
+                    size = new Float2(172, 200);
+                }
+                else
+                {
+                    pos += new Float2(0, 40);
+                    size = new Float2(300, 200);
+                }
+                _textBox = new CustomCodeTextBox
+                {
+                    IsMultiline = true,
+                    Location = pos,
+                    Size = size,
+                    Parent = this,
+                    AnchorMax = Float2.One,
+                };
+                _textBox.EditEnd += () => SetValue(0, _textBox.Text);
+            }
+
+            public override bool CanSelect(ref Float2 location)
+            {
+                return base.CanSelect(ref location) && !_resizeButtonRect.MakeOffsetted(Location).Contains(ref location);
+            }
+
+            public override void OnSurfaceLoaded(SurfaceNodeActions action)
+            {
+                base.OnSurfaceLoaded(action);
+
+                _textBox.Text = (string)Values[0];
+
+                var size = SizeValue;
+                if (Surface != null && Surface.GridSnappingEnabled)
+                    size = Surface.SnapToGrid(size, true);
+                Resize(size.X, size.Y);
+            }
+
+            public override void OnValuesChanged()
+            {
+                base.OnValuesChanged();
+
+                var size = SizeValue;
+                Resize(size.X, size.Y);
+                _textBox.Text = (string)Values[0];
+            }
+
+            protected override void UpdateRectangles()
+            {
+                base.UpdateRectangles();
+
+                const float buttonMargin = FlaxEditor.Surface.Constants.NodeCloseButtonMargin;
+                const float buttonSize = FlaxEditor.Surface.Constants.NodeCloseButtonSize;
+                _resizeButtonRect = new Rectangle(_closeButtonRect.Left, Height - buttonSize - buttonMargin - 4, buttonSize, buttonSize);
+            }
+
+            public override void Draw()
+            {
+                base.Draw();
+
+                var style = Style.Current;
+                if (_isResizing)
+                {
+                    Render2D.FillRectangle(_resizeButtonRect, style.Selection);
+                    Render2D.DrawRectangle(_resizeButtonRect, style.SelectionBorder);
+                }
+                Render2D.DrawSprite(style.Scale, _resizeButtonRect, _resizeButtonRect.Contains(_mousePosition) && Surface.CanEdit ? style.Foreground : style.ForegroundGrey);
+            }
+
+            public override void OnLostFocus()
+            {
+                if (_isResizing)
+                    EndResizing();
+
+                base.OnLostFocus();
+            }
+
+            public override void OnEndMouseCapture()
+            {
+                if (_isResizing)
+                    EndResizing();
+
+                base.OnEndMouseCapture();
+            }
+
+            public override bool OnMouseDown(Float2 location, MouseButton button)
+            {
+                if (base.OnMouseDown(location, button))
+                    return true;
+
+                if (button == MouseButton.Left && _resizeButtonRect.Contains(ref location) && Surface.CanEdit)
+                {
+                    // Start sliding
+                    _isResizing = true;
+                    _startResizingSize = Size;
+                    _startResizingCornerOffset = Size - location;
+                    StartMouseCapture();
+                    Cursor = CursorType.SizeNWSE;
+                    return true;
+                }
+
+                return false;
+            }
+
+            public override void OnMouseMove(Float2 location)
+            {
+                if (_isResizing)
+                {
+                    var emptySize = CalculateNodeSize(0, 0);
+                    var size = Float2.Max(location - emptySize + _startResizingCornerOffset, new Float2(240, 160));
+                    Resize(size.X, size.Y);
+                }
+                else
+                {
+                    base.OnMouseMove(location);
+                }
+            }
+
+            public override bool OnMouseUp(Float2 location, MouseButton button)
+            {
+                if (button == MouseButton.Left && _isResizing)
+                {
+                    EndResizing();
+                    return true;
+                }
+
+                return base.OnMouseUp(location, button);
+            }
+
+            private void EndResizing()
+            {
+                Cursor = CursorType.Default;
+                EndMouseCapture();
+                _isResizing = false;
+                if (_startResizingSize != Size)
+                {
+                    var emptySize = CalculateNodeSize(0, 0);
+                    SizeValue = Size - emptySize;
+                    Surface.MarkAsEdited(false);
+                }
+            }
+        }
+
         internal enum MaterialTemplateInputsMapping
         {
             /// <summary>
@@ -410,13 +617,15 @@ namespace FlaxEditor.Surface.Archetypes
             new NodeArchetype
             {
                 TypeID = 8,
+                Create = (id, context, arch, groupArch) => new CustomCodeNode(id, context, arch, groupArch),
                 Title = "Custom Code",
                 Description = "Custom HLSL shader code expression",
                 Flags = NodeFlags.MaterialGraph,
                 Size = new Float2(300, 200),
                 DefaultValues = new object[]
                 {
-                    "// Here you can add HLSL code\nOutput0 = Input0;"
+                    "// Here you can add HLSL code\nOutput0 = Input0;",
+                    new Float2(300, 200),
                 },
                 Elements = new[]
                 {
@@ -433,8 +642,6 @@ namespace FlaxEditor.Surface.Archetypes
                     NodeElementArchetype.Factory.Output(1, "Output1", typeof(Float4), 9),
                     NodeElementArchetype.Factory.Output(2, "Output2", typeof(Float4), 10),
                     NodeElementArchetype.Factory.Output(3, "Output3", typeof(Float4), 11),
-
-                    NodeElementArchetype.Factory.TextBox(60, 0, 175, 200, 0),
                 }
             },
             new NodeArchetype
@@ -874,6 +1081,7 @@ namespace FlaxEditor.Surface.Archetypes
             new NodeArchetype
             {
                 TypeID = 38,
+                Create = (id, context, arch, groupArch) => new CustomCodeNode(id, context, arch, groupArch),
                 Title = "Custom Global Code",
                 Description = "Custom global HLSL shader code expression (placed before material shader code). Can contain includes to shader utilities or declare functions to reuse later.",
                 Flags = NodeFlags.MaterialGraph,
@@ -883,6 +1091,7 @@ namespace FlaxEditor.Surface.Archetypes
                     "// Here you can add HLSL code\nfloat4 GetCustomColor()\n{\n\treturn float4(1, 0, 0, 1);\n}",
                     true,
                     (int)MaterialTemplateInputsMapping.Utilities,
+                    new Float2(300, 240),
                 },
                 Elements = new[]
                 {
@@ -890,7 +1099,6 @@ namespace FlaxEditor.Surface.Archetypes
                     NodeElementArchetype.Factory.Text(20, 0, "Enabled"),
                     NodeElementArchetype.Factory.Text(0, 20, "Location"),
                     NodeElementArchetype.Factory.Enum(50, 20, 120, 2, typeof(MaterialTemplateInputsMapping)),
-                    NodeElementArchetype.Factory.TextBox(0, 40, 300, 200, 0),
                 }
             },
             new NodeArchetype

Source/Editor/Utilities/ScreenUtilities.cpp

@@ -1,131 +0,0 @@
-// Copyright (c) Wojciech Figat. All rights reserved.
-
-#include "ScreenUtilities.h"
-#include "Engine/Core/Math/Vector2.h"
-#include "Engine/Core/Delegate.h"
-#include "Engine/Core/Log.h"
-#include "Engine/Profiler/ProfilerCPU.h"
-
-Delegate<Color32> ScreenUtilities::PickColorDone;
-
-#if PLATFORM_WINDOWS
-
-#include <Windows.h>
-
-#pragma comment(lib, "Gdi32.lib")
-
-static HHOOK MouseCallbackHook;
-
-LRESULT CALLBACK OnScreenUtilsMouseCallback(_In_ int nCode, _In_ WPARAM wParam, _In_ LPARAM lParam)
-{
-    if (nCode >= 0 && wParam == WM_LBUTTONDOWN)
-    {
-        UnhookWindowsHookEx(MouseCallbackHook);
-
-        // Push event with the picked color
-        const Float2 cursorPos = Platform::GetMousePosition();
-        const Color32 colorPicked = ScreenUtilities::GetColorAt(cursorPos);
-        ScreenUtilities::PickColorDone(colorPicked);
-        return 1;
-    }
-    return CallNextHookEx(NULL, nCode, wParam, lParam);
-}
-
-Color32 ScreenUtilities::GetColorAt(const Float2& pos)
-{
-    PROFILE_CPU();
-    HDC deviceContext = GetDC(NULL);
-    COLORREF color = GetPixel(deviceContext, (int)pos.X, (int)pos.Y);
-    ReleaseDC(NULL, deviceContext);
-    return Color32(GetRValue(color), GetGValue(color), GetBValue(color), 255);
-}
-
-void ScreenUtilities::PickColor()
-{
-    MouseCallbackHook = SetWindowsHookEx(WH_MOUSE_LL, OnScreenUtilsMouseCallback, NULL, NULL);
-    if (MouseCallbackHook == NULL)
-    {
-        LOG(Warning, "Failed to set mouse hook.");
-        LOG(Warning, "Error: {0}", GetLastError());
-    }
-}
-
-#elif PLATFORM_LINUX
-
-#include "Engine/Platform/Linux/LinuxPlatform.h"
-#include "Engine/Platform/Linux/IncludeX11.h"
-
-Color32 ScreenUtilities::GetColorAt(const Float2& pos)
-{
-    X11::XColor color;
-    
-    X11::Display* display = (X11::Display*) LinuxPlatform::GetXDisplay();
-    int defaultScreen = X11::XDefaultScreen(display);
-
-    X11::XImage* image;
-    image = X11::XGetImage(display, X11::XRootWindow(display, defaultScreen), (int)pos.X, (int)pos.Y, 1, 1, AllPlanes, XYPixmap);
-    color.pixel = XGetPixel(image, 0, 0);
-    X11::XFree(image);
-
-    X11::XQueryColor(display, X11::XDefaultColormap(display, defaultScreen), &color);
-
-    Color32 outputColor;
-    outputColor.R = color.red / 256;
-    outputColor.G = color.green / 256;
-    outputColor.B = color.blue / 256;
-    outputColor.A = 255;
-    return outputColor;
-}
-
-void OnScreenUtilsXEventCallback(void* eventPtr)
-{
-    X11::XEvent* event = (X11::XEvent*) eventPtr;
-    X11::Display* display = (X11::Display*)LinuxPlatform::GetXDisplay();
-    if (event->type == ButtonPress)
-    {
-        const Float2 cursorPos = Platform::GetMousePosition();
-        const Color32 colorPicked = ScreenUtilities::GetColorAt(cursorPos);
-        X11::XUngrabPointer(display, CurrentTime);
-        ScreenUtilities::PickColorDone(colorPicked);
-        LinuxPlatform::xEventRecieved.Unbind(OnScreenUtilsXEventCallback);
-    }
-}
-
-void ScreenUtilities::PickColor()
-{
-    PROFILE_CPU();
-    X11::Display* display = (X11::Display*) LinuxPlatform::GetXDisplay();
-    X11::Window rootWindow = X11::XRootWindow(display, X11::XDefaultScreen(display));
-
-    X11::Cursor cursor = XCreateFontCursor(display, 130);
-    int grabbedPointer = X11::XGrabPointer(display, rootWindow, 0,  ButtonPressMask, GrabModeAsync, GrabModeAsync, rootWindow, cursor, CurrentTime);
-    if (grabbedPointer != GrabSuccess)
-    {
-        LOG(Error, "Failed to grab cursor for events.");
-        X11::XFreeCursor(display, cursor);
-        return;
-    }
-
-    X11::XFreeCursor(display, cursor);
-    LinuxPlatform::xEventRecieved.Bind(OnScreenUtilsXEventCallback);
-}
-
-#elif PLATFORM_MAC
-
-#include <Cocoa/Cocoa.h>
-#include <AppKit/AppKit.h>
-
-Color32 ScreenUtilities::GetColorAt(const Float2& pos)
-{
-    // TODO: implement ScreenUtilities for macOS
-    return { 0, 0, 0, 255 };
-}
-
-void ScreenUtilities::PickColor()
-{
-    // This is what C# calls to start the color picking sequence
-    // This should stop mouse clicks from working for one click, and that click is on the selected color
-    // There is a class called NSColorSample that might implement that for you, but maybe not.
-}
-
-#endif

Source/Editor/Utilities/ScreenUtilities.h

@@ -2,32 +2,4 @@
 
 #pragma once
 
-#include "Engine/Core/Types/BaseTypes.h"
-#include "Engine/Core/Math/Color32.h"
-#include "Engine/Core/Math/Vector2.h"
-#include "Engine/Core/Delegate.h"
-
-/// <summary>
-/// Platform-dependent screen utilities.
-/// </summary>
-API_CLASS(Static) class FLAXENGINE_API ScreenUtilities
-{
-    DECLARE_SCRIPTING_TYPE_MINIMAL(ScreenUtilities);
-
-    /// <summary>
-    /// Gets the pixel color at the specified coordinates.
-    /// </summary>
-    /// <param name="pos">Screen-space coordinate to read.</param>
-    /// <returns>Pixel color at the specified coordinates.</returns>
-    API_FUNCTION() static Color32 GetColorAt(const Float2& pos);
-
-    /// <summary>
-    /// Starts async color picking. Color will be returned through PickColorDone event when the actions ends (user selected the final color with a mouse). When action is active, GetColorAt can be used to read the current value.
-    /// </summary>
-    API_FUNCTION() static void PickColor();
-
-    /// <summary>
-    /// Called when PickColor action is finished.
-    /// </summary>
-    API_EVENT() static Delegate<Color32> PickColorDone;
-};
+#include "Engine/Platform/ScreenUtilities.h"

Source/Editor/Utilities/Utils.cs

@@ -1559,5 +1559,17 @@ namespace FlaxEditor.Utilities
                 c = c.Parent;
             return c as ISceneEditingContext;
         }
+
+        internal static bool UseCustomWindowDecorations(bool isMainWindow = false)
+        {
+            return Editor.Instance.Options.Options.Interface.WindowDecorations switch
+            {
+                Options.InterfaceOptions.WindowDecorationsType.Auto => !Platform.SupportsNativeDecorations,
+                Options.InterfaceOptions.WindowDecorationsType.AutoChildOnly => !isMainWindow ? !Platform.SupportsNativeDecorations : true,
+                Options.InterfaceOptions.WindowDecorationsType.Native => false,
+                Options.InterfaceOptions.WindowDecorationsType.ClientSide => true,
+                _ => throw new ArgumentOutOfRangeException()
+            };
+        }
     }
 }

Source/Editor/Utilities/ViewportIconsRenderer.cpp

@@ -5,6 +5,7 @@
 #include "Engine/Content/Assets/Model.h"
 #include "Engine/Content/Assets/MaterialInstance.h"
 #include "Engine/Content/Content.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Level/Level.h"
 #include "Engine/Level/Scene/Scene.h"
 #include "Engine/Level/Actors/PointLight.h"
@@ -263,6 +264,7 @@ void ViewportIconsRendererService::DrawIcons(RenderContext& renderContext, Actor
 
 bool ViewportIconsRendererService::Init()
 {
+    PROFILE_MEM(Editor);
     QuadModel = Content::LoadAsyncInternal<Model>(TEXT("Engine/Models/Quad"));
 #define INIT(type, path) \
     InstanceBuffers[static_cast<int32>(IconTypes::type)].Setup(1); \

Source/Editor/Viewport/EditorGizmoViewport.cs

@@ -77,7 +77,7 @@ namespace FlaxEditor.Viewport
         public bool SnapToVertex => ContainsFocus && Editor.Instance.Options.Options.Input.SnapToVertex.Process(Root);
 
         /// <inheritdoc />
-        public Float2 MouseDelta => _mouseDelta;
+        public Float2 MouseDelta => FlaxEngine.Input.MousePositionDelta;
 
         /// <inheritdoc />
         public bool UseSnapping => Root?.GetKey(KeyboardKeys.Control) ?? false;

Source/Editor/Viewport/EditorViewport.cs

@@ -4,6 +4,7 @@ using System;
 using System.Linq;
 using FlaxEditor.Content.Settings;
 using FlaxEditor.GUI.ContextMenu;
+using FlaxEditor.GUI.Docking;
 using FlaxEditor.GUI.Input;
 using FlaxEditor.Options;
 using FlaxEditor.Viewport.Cameras;
@@ -158,18 +159,22 @@ namespace FlaxEditor.Viewport
         private float _movementSpeed;
         private float _minMovementSpeed;
         private float _maxMovementSpeed;
+#if !PLATFORM_SDL
         private float _mouseAccelerationScale;
         private bool _useMouseFiltering;
         private bool _useMouseAcceleration;
+#endif
 
         // Input
 
         internal bool _disableInputUpdate;
         private bool _isControllingMouse, _isViewportControllingMouse, _wasVirtualMouseRightDown, _isVirtualMouseRightDown;
-        private int _deltaFilteringStep;
         private Float2 _startPos;
+#if !PLATFORM_SDL
         private Float2 _mouseDeltaLast;
+        private int _deltaFilteringStep;
         private Float2[] _deltaFilteringBuffer = new Float2[FpsCameraFilteringFrames];
+#endif
 
         /// <summary>
         /// The previous input (from the previous update).
@@ -522,10 +527,11 @@ namespace FlaxEditor.Viewport
         : base(task)
         {
             _editor = Editor.Instance;
-
+#if !PLATFORM_SDL
             _mouseAccelerationScale = 0.1f;
             _useMouseFiltering = false;
             _useMouseAcceleration = false;
+#endif
             _camera = camera;
             if (_camera != null)
                 _camera.Viewport = this;
@@ -1520,7 +1526,9 @@ namespace FlaxEditor.Viewport
             // Hide cursor and start tracking mouse movement
             win.StartTrackingMouse(false);
             win.Cursor = CursorType.Hidden;
+            win.MouseMoveRelative += OnMouseMoveRelative;
 
+#if !PLATFORM_SDL
             // Center mouse position if it's too close to the edge
             var size = Size;
             var center = Float2.Round(size * 0.5f);
@@ -1529,6 +1537,7 @@ namespace FlaxEditor.Viewport
                 _viewMousePos = center;
                 win.MousePosition = PointToWindow(_viewMousePos);
             }
+#endif
         }
 
         /// <summary>
@@ -1540,6 +1549,7 @@ namespace FlaxEditor.Viewport
             // Restore cursor and stop tracking mouse movement
             win.Cursor = CursorType.Default;
             win.EndTrackingMouse();
+            win.MouseMoveRelative -= OnMouseMoveRelative;
         }
 
         /// <summary>
@@ -1621,18 +1631,15 @@ namespace FlaxEditor.Viewport
 
             // Get parent window
             var win = (WindowRootControl)Root;
-
-            // Get current mouse position in the view
+            if (win.IsFocused)
             {
-                // When the window is not focused, the position in window does not return sane values
-                Float2 pos = PointFromWindow(win.MousePosition);
-                if (!float.IsInfinity(pos.LengthSquared))
-                    _viewMousePos = pos;
+                // Get current mouse position in the view
+                _viewMousePos = PointFromWindow(win.MousePosition);
             }
 
             // Update input
             var window = win.Window;
-            var canUseInput = window != null && window.IsFocused && window.IsForegroundWindow;
+            var canUseInput = window != null && window.IsFocused && window.IsForegroundWindow && !WindowDragHelper.IsDragActive;
             {
                 // Get input buttons and keys (skip if viewport has no focus or mouse is over a child control)
                 var isViewportControllingMouse = canUseInput && IsControllingMouse;
@@ -1644,9 +1651,17 @@ namespace FlaxEditor.Viewport
                     else
                         EndMouseCapture();
                 }
-                bool useMouse = IsControllingMouse || (Mathf.IsInRange(_viewMousePos.X, 0, Width) && Mathf.IsInRange(_viewMousePos.Y, 0, Height));
+                
                 _prevInput = _input;
+#if PLATFORM_SDL
+                bool useMouse = IsControllingMouse || ContainsPoint(ref _viewMousePos) || _prevInput.IsControllingMouse;
                 var hit = GetChildAt(_viewMousePos, c => c.Visible && !(c is CanvasRootControl) && !(c is UIEditorRoot));
+                if (_prevInput.IsControllingMouse)
+                    hit = null;
+#else
+                bool useMouse = IsControllingMouse || ContainsPoint(ref _viewMousePos);
+                var hit = GetChildAt(_viewMousePos, c => c.Visible && !(c is CanvasRootControl) && !(c is UIEditorRoot));
+#endif
                 if (canUseInput && ContainsFocus && hit == null)
                     _input.Gather(win.Window, useMouse, ref _prevInput);
                 else
@@ -1759,6 +1774,10 @@ namespace FlaxEditor.Viewport
                 if (_input.IsControlDown)
                     moveDelta *= 0.3f;
 
+#if PLATFORM_SDL
+                var mouseDelta = _mouseDelta;
+                _mouseDelta = Float2.Zero;
+#else
                 // Calculate smooth mouse delta not dependant on viewport size
                 var offset = _viewMousePos - _startPos;
                 if (_input.IsZooming && !_input.IsMouseRightDown && !_input.IsMouseLeftDown && !_input.IsMouseMiddleDown && !_isOrtho && !rmbWheel && !_isVirtualMouseRightDown)
@@ -1800,6 +1819,7 @@ namespace FlaxEditor.Viewport
                     mouseDelta += _mouseDeltaLast * _mouseAccelerationScale;
                     _mouseDeltaLast = currentDelta;
                 }
+#endif
 
                 // Update
                 moveDelta *= dt * (60.0f * 4.0f);
@@ -1808,12 +1828,14 @@ namespace FlaxEditor.Viewport
                     mouseDelta *= new Float2(1, -1);
                 UpdateView(dt, ref moveDelta, ref mouseDelta, out var centerMouse);
 
+#if !PLATFORM_SDL
                 // Move mouse back to the root position
                 if (centerMouse && (_input.IsMouseRightDown || _input.IsMouseLeftDown || _input.IsMouseMiddleDown || _isVirtualMouseRightDown))
                 {
                     var center = PointToWindow(_startPos);
                     win.MousePosition = center;
                 }
+#endif
 
                 // Change Ortho size on mouse scroll
                 if (_isOrtho && !rmbWheel)
@@ -1825,6 +1847,8 @@ namespace FlaxEditor.Viewport
             }
             else
             {
+#if PLATFORM_SDL
+#else
                 if (_input.IsMouseLeftDown || _input.IsMouseRightDown || _isVirtualMouseRightDown)
                 {
                     // Calculate smooth mouse delta not dependant on viewport size
@@ -1839,6 +1863,7 @@ namespace FlaxEditor.Viewport
                     _mouseDelta = Float2.Zero;
                 }
                 _mouseDeltaLast = Float2.Zero;
+#endif
 
                 if (ContainsFocus)
                 {
@@ -1888,6 +1913,12 @@ namespace FlaxEditor.Viewport
             _input.MouseWheelDelta = 0;
         }
 
+        /// <inheritdoc />
+        public void OnMouseMoveRelative(ref Float2 mouseMotion)
+        {
+            _mouseDelta += mouseMotion;
+        }
+
         /// <inheritdoc />
         public override bool OnMouseDown(Float2 location, MouseButton button)
         {
@@ -1953,7 +1984,8 @@ namespace FlaxEditor.Viewport
 
             if (_isControllingMouse)
             {
-                OnControlMouseEnd(RootWindow.Window);
+                if (RootWindow?.Window != null)
+                    OnControlMouseEnd(RootWindow.Window);
                 _isControllingMouse = false;
                 _isVirtualMouseRightDown = false;
             }

Source/Editor/Viewport/MainEditorGizmoViewport.cs

@@ -611,16 +611,25 @@ namespace FlaxEditor.Viewport
 
             // Don't allow rubber band selection when gizmo is controlling mouse, vertex painting mode, or cloth painting is enabled
             bool canStart = !(IsControllingMouse || IsRightMouseButtonDown || IsAltKeyDown) &&
-                            Gizmos?.Active is TransformGizmo && !Gizmos.Active.IsControllingMouse;
+                            Gizmos?.Active is TransformGizmo;
             _rubberBandSelector.TryCreateRubberBand(canStart, _viewMousePos);
         }
 
+        /// <inheritdoc />
+        protected override void OnControlMouseBegin(Window win)
+        {
+            _rubberBandSelector.ReleaseRubberBandSelection();
+
+            base.OnControlMouseBegin(win);
+        }
+
         /// <inheritdoc />
         protected override void OnLeftMouseButtonDown()
         {
             base.OnLeftMouseButtonDown();
 
-            _rubberBandSelector.TryStartingRubberBandSelection();
+            if (!IsAltKeyDown)
+                _rubberBandSelector.TryStartingRubberBandSelection();
         }
 
         /// <inheritdoc />

Source/Editor/Windows/AboutDialog.cs

@@ -129,6 +129,9 @@ namespace FlaxEditor.Windows
                 "Mono Project - www.mono-project.com",
 #if USE_NETCORE
                 ".NET - www.dotnet.microsoft.com",
+#endif
+#if PLATFORM_SDL
+                "Simple DirectMedia Layer - www.libsdl.org",
 #endif
                 "FreeType Project - www.freetype.org",
                 "Assimp - www.assimp.sourceforge.net",

Source/Editor/Windows/GameWindow.cs

@@ -1063,7 +1063,7 @@ namespace FlaxEditor.Windows
                 _cursorVisible = Screen.CursorVisible;
                 _cursorLockMode = Screen.CursorLock;
                 Screen.CursorVisible = true;
-                if (Screen.CursorLock == CursorLockMode.Clipped)
+                if (Screen.CursorLock == CursorLockMode.Clipped || Screen.CursorLock == CursorLockMode.Locked)
                     Screen.CursorLock = CursorLockMode.None;
 
                 // Defocus
@@ -1152,8 +1152,11 @@ namespace FlaxEditor.Windows
 
             if (Editor.StateMachine.IsPlayMode && !Editor.StateMachine.PlayingState.IsPaused)
             {
+                // Make sure the cursor is always in the viewport when cursor is locked
+                bool forceCenter = _cursorLockMode != CursorLockMode.None && !IsMouseOver;
+
                 // Center mouse in play mode
-                if (CenterMouseOnFocus)
+                if (CenterMouseOnFocus || forceCenter)
                 {
                     var center = PointToWindow(Size * 0.5f);
                     Root.MousePosition = center;
@@ -1178,9 +1181,10 @@ namespace FlaxEditor.Windows
                 _cursorVisible = Screen.CursorVisible;
                 _cursorLockMode = Screen.CursorLock;
 
-                // Restore cursor visibility (could be hidden by the game)
+                // Restore cursor state, could be hidden or locked by the game
                 if (!_cursorVisible)
                     Screen.CursorVisible = true;
+                Screen.CursorLock = CursorLockMode.None;
             }
         }
 

Source/Editor/Windows/Profiler/Assets.cs

@@ -34,6 +34,7 @@ namespace FlaxEditor.Windows.Profiler
         private List<ClickableRow> _tableRowsCache;
         private Dictionary<Guid, Resource> _resourceCache;
         private StringBuilder _stringBuilder;
+        private Asset[] _assetsCache;
 
         public Assets()
         : base("Assets")
@@ -138,12 +139,12 @@ namespace FlaxEditor.Windows.Profiler
                 _stringBuilder = new StringBuilder();
 
             // Capture current assets usage info
-            var assets = FlaxEngine.Content.Assets;
-            var resources = new Resource[assets.Length];
+            FlaxEngine.Content.GetAssets(ref _assetsCache, out var count);
+            var resources = new Resource[count];
             ulong totalMemoryUsage = 0;
-            for (int i = 0; i < resources.Length; i++)
+            for (int i = 0; i < count; i++)
             {
-                var asset = assets[i];
+                var asset = _assetsCache[i];
                 ref var resource = ref resources[i];
                 if (!asset)
                     continue;
@@ -179,6 +180,7 @@ namespace FlaxEditor.Windows.Profiler
             if (_resources == null)
                 _resources = new SamplesBuffer<Resource[]>();
             _resources.Add(resources);
+            Array.Clear(_assetsCache);
         }
 
         /// <inheritdoc />
@@ -200,6 +202,7 @@ namespace FlaxEditor.Windows.Profiler
             _resourceCache?.Clear();
             _tableRowsCache?.Clear();
             _stringBuilder?.Clear();
+            _assetsCache = null;
 
             base.OnDestroy();
         }

Source/Editor/Windows/Profiler/Memory.cs

@@ -2,6 +2,8 @@
 
 #if USE_PROFILER
 using System;
+using System.Collections.Generic;
+using FlaxEditor.GUI;
 using FlaxEngine;
 using FlaxEngine.GUI;
 
@@ -13,9 +15,22 @@ namespace FlaxEditor.Windows.Profiler
     /// <seealso cref="FlaxEditor.Windows.Profiler.ProfilerMode" />
     internal sealed class Memory : ProfilerMode
     {
+        private struct FrameData
+        {
+            public ProfilerMemory.GroupsArray Usage;
+            public ProfilerMemory.GroupsArray Peek;
+            public ProfilerMemory.GroupsArray Count;
+        }
+
         private readonly SingleChart _nativeAllocationsChart;
         private readonly SingleChart _managedAllocationsChart;
-
+        private readonly Table _table;
+        private SamplesBuffer<FrameData> _frames;
+        private List<Row> _tableRowsCache;
+        private string[] _groupNames;
+        private int[] _groupOrder;
+        private Label _warningText;
+        
         public Memory()
         : base("Memory")
         {
@@ -50,6 +65,70 @@ namespace FlaxEditor.Windows.Profiler
                 Parent = layout,
             };
             _managedAllocationsChart.SelectedSampleChanged += OnSelectedSampleChanged;
+
+            // Warning text
+            if (!ProfilerMemory.Enabled)
+            {
+                _warningText = new Label
+                {
+                    Text = "Detailed memory profiling is disabled. Run with command line '-mem'",
+                    TextColor = Color.Red,
+                    Visible = false,
+                    Parent = layout,
+                };
+            }
+
+            // Table
+            var style = Style.Current;
+            var headerColor = style.LightBackground;
+            var textColor = style.Foreground;
+            _table = new Table
+            {
+                Columns = new[]
+                {
+                    new ColumnDefinition
+                    {
+                        UseExpandCollapseMode = true,
+                        CellAlignment = TextAlignment.Near,
+                        Title = "Group",
+                        TitleBackgroundColor = headerColor,
+                        TitleColor = textColor,
+                    },
+                    new ColumnDefinition
+                    {
+                        Title = "Usage",
+                        TitleBackgroundColor = headerColor,
+                        FormatValue = FormatCellBytes,
+                        TitleColor = textColor,
+                    },
+                    new ColumnDefinition
+                    {
+                        Title = "Peek",
+                        TitleBackgroundColor = headerColor,
+                        FormatValue = FormatCellBytes,
+                        TitleColor = textColor,
+                    },
+                    new ColumnDefinition
+                    {
+                        Title = "Count",
+                        TitleBackgroundColor = headerColor,
+                        TitleColor = textColor,
+                    },
+                },
+                Parent = layout,
+            };
+            _table.Splits = new[]
+            {
+                0.5f,
+                0.2f,
+                0.2f,
+                0.1f,
+            };
+        }
+
+        private string FormatCellBytes(object x)
+        {
+            return Utilities.Utils.FormatBytesCount(Convert.ToUInt64(x));
         }
 
         /// <inheritdoc />
@@ -57,6 +136,7 @@ namespace FlaxEditor.Windows.Profiler
         {
             _nativeAllocationsChart.Clear();
             _managedAllocationsChart.Clear();
+            _frames?.Clear();
         }
 
         /// <inheritdoc />
@@ -84,6 +164,19 @@ namespace FlaxEditor.Windows.Profiler
 
             _nativeAllocationsChart.AddSample(nativeMemoryAllocation);
             _managedAllocationsChart.AddSample(managedMemoryAllocation);
+
+            // Gather memory profiler stats for groups
+            var frame = new FrameData
+            {
+                Usage = ProfilerMemory.GetGroups(0),
+                Peek = ProfilerMemory.GetGroups(1),
+                Count = ProfilerMemory.GetGroups(2),
+            };
+            if (_frames == null)
+                _frames = new SamplesBuffer<FrameData>();
+            if (_groupNames == null)
+                _groupNames = ProfilerMemory.GetGroupNames();
+            _frames.Add(frame);
         }
 
         /// <inheritdoc />
@@ -91,6 +184,112 @@ namespace FlaxEditor.Windows.Profiler
         {
             _nativeAllocationsChart.SelectedSampleIndex = selectedFrame;
             _managedAllocationsChart.SelectedSampleIndex = selectedFrame;
+
+            UpdateTable(selectedFrame);
+        }
+
+        /// <inheritdoc />
+        public override void OnDestroy()
+        {
+            _tableRowsCache?.Clear();
+            _groupNames = null;
+            _groupOrder = null;
+
+            base.OnDestroy();
+        }
+
+        private void UpdateTable(int selectedFrame)
+        {
+            if (_frames == null)
+                return;
+            if (_tableRowsCache == null)
+                _tableRowsCache = new List<Row>();
+            _table.IsLayoutLocked = true;
+
+            RecycleTableRows(_table, _tableRowsCache);
+            UpdateTableInner(selectedFrame);
+
+            _table.UnlockChildrenRecursive();
+            _table.PerformLayout();
+        }
+
+        private unsafe void UpdateTableInner(int selectedFrame)
+        {
+            if (_frames.Count == 0)
+                return;
+            if (_warningText != null)
+                _warningText.Visible = true;
+            var frame = _frames.Get(selectedFrame);
+            var totalUage = frame.Usage.Values0[(int)ProfilerMemory.Groups.TotalTracked];
+            var totalPeek = frame.Peek.Values0[(int)ProfilerMemory.Groups.TotalTracked];
+            var totalCount = frame.Count.Values0[(int)ProfilerMemory.Groups.TotalTracked];
+
+            // Sort by memory size
+            if (_groupOrder == null)
+                _groupOrder = new int[(int)ProfilerMemory.Groups.MAX];
+            for (int i = 0; i < (int)ProfilerMemory.Groups.MAX; i++)
+                _groupOrder[i] = i;
+            Array.Sort(_groupOrder, (x, y) =>
+            {
+                var tmp = _frames.Get(selectedFrame);
+                return tmp.Usage.Values0[y].CompareTo(tmp.Usage.Values0[x]);
+            });
+
+            // Add rows
+            var rowColor2 = Style.Current.Background * 1.4f;
+            for (int i = 0; i < (int)ProfilerMemory.Groups.MAX; i++)
+            {
+                var group = _groupOrder[i];
+                var groupUsage = frame.Usage.Values0[group];
+                if (groupUsage <= 0)
+                    continue;
+                var groupPeek = frame.Peek.Values0[group];
+                var groupCount = frame.Count.Values0[group];
+
+                Row row;
+                if (_tableRowsCache.Count != 0)
+                {
+                    var last = _tableRowsCache.Count - 1;
+                    row = _tableRowsCache[last];
+                    _tableRowsCache.RemoveAt(last);
+                }
+                else
+                {
+                    row = new Row
+                    {
+                        Values = new object[4],
+                        BackgroundColors = new Color[4],
+                    };
+                }
+                {
+                    // Group
+                    row.Values[0] = _groupNames[group];
+
+                    // Usage
+                    row.Values[1] = groupUsage;
+                    row.BackgroundColors[1] = Color.Red.AlphaMultiplied(Mathf.Min(1, (float)groupUsage / totalUage) * 0.5f);
+
+                    // Peek
+                    row.Values[2] = groupPeek;
+                    row.BackgroundColors[2] = Color.Red.AlphaMultiplied(Mathf.Min(1, (float)groupPeek / totalPeek) * 0.5f);
+
+                    // Count
+                    row.Values[3] = groupCount;
+                    row.BackgroundColors[3] = Color.Red.AlphaMultiplied(Mathf.Min(1, (float)groupCount / totalCount) * 0.5f);
+                }
+                row.Width = _table.Width;
+                row.BackgroundColor = i % 2 == 1 ? rowColor2 : Color.Transparent;
+                row.Parent = _table;
+
+                var useBackground = group != (int)ProfilerMemory.Groups.Total &&
+                                    group != (int)ProfilerMemory.Groups.TotalTracked &&
+                                    group != (int)ProfilerMemory.Groups.Malloc;
+                if (!useBackground)
+                {
+                    for (int k = 1; k < row.BackgroundColors.Length; k++)
+                        row.BackgroundColors[k] = Color.Transparent;
+                }
+            }
         }
     }
 }

Source/Editor/Windows/Profiler/MemoryGPU.cs

@@ -35,6 +35,7 @@ namespace FlaxEditor.Windows.Profiler
         private Dictionary<string, Guid> _assetPathToId;
         private Dictionary<Guid, Resource> _resourceCache;
         private StringBuilder _stringBuilder;
+        private GPUResource[] _gpuResourcesCached;
 
         public MemoryGPU()
         : base("GPU Memory")
@@ -138,13 +139,15 @@ namespace FlaxEditor.Windows.Profiler
 
             // Capture current GPU resources usage info
             var contentDatabase = Editor.Instance.ContentDatabase;
-            var gpuResources = GPUDevice.Instance.Resources;
-            var resources = new Resource[gpuResources.Length];
+            GPUDevice.Instance.GetResources(ref _gpuResourcesCached, out var count);
+            var resources = new Resource[count];
             var sb = _stringBuilder;
-            for (int i = 0; i < resources.Length; i++)
+            for (int i = 0; i < count; i++)
             {
-                var gpuResource = gpuResources[i];
+                var gpuResource = _gpuResourcesCached[i];
                 ref var resource = ref resources[i];
+                if (!gpuResource)
+                    continue;
 
                 // Try to reuse cached resource info
                 var gpuResourceId = gpuResource.ID;
@@ -219,6 +222,7 @@ namespace FlaxEditor.Windows.Profiler
             if (_resources == null)
                 _resources = new SamplesBuffer<Resource[]>();
             _resources.Add(resources);
+            Array.Clear(_gpuResourcesCached);
         }
 
         /// <inheritdoc />
@@ -255,6 +259,7 @@ namespace FlaxEditor.Windows.Profiler
             _assetPathToId?.Clear();
             _tableRowsCache?.Clear();
             _stringBuilder?.Clear();
+            _gpuResourcesCached = null;
 
             base.OnDestroy();
         }

Source/Editor/Windows/SceneTreeWindow.cs

@@ -26,7 +26,6 @@ namespace FlaxEditor.Windows
         private Tree _tree;
         private Panel _sceneTreePanel;
         private bool _isUpdatingSelection;
-        private bool _isMouseDown;
         private bool _blockSceneTreeScroll = false;
 
         private DragAssets _dragAssets;
@@ -374,10 +373,7 @@ namespace FlaxEditor.Windows
                 return true;
 
             if (buttons == MouseButton.Right)
-            {
-                _isMouseDown = true;
                 return true;
-            }
 
             return false;
         }
@@ -388,10 +384,8 @@ namespace FlaxEditor.Windows
             if (base.OnMouseUp(location, buttons))
                 return true;
 
-            if (_isMouseDown && buttons == MouseButton.Right)
+            if (buttons == MouseButton.Right)
             {
-                _isMouseDown = false;
-
                 if (Editor.StateMachine.CurrentState.CanEditScene)
                 {
                     // Show context menu
@@ -416,14 +410,6 @@ namespace FlaxEditor.Windows
             return false;
         }
 
-        /// <inheritdoc />
-        public override void OnLostFocus()
-        {
-            _isMouseDown = false;
-
-            base.OnLostFocus();
-        }
-
         /// <inheritdoc />
         public override DragDropEffect OnDragEnter(ref Float2 location, DragData data)
         {

Source/Editor/Windows/SplashScreen.cpp

@@ -28,7 +28,7 @@ const Char* SplashScreenQuotes[] =
 #elif PLATFORM_LINUX
     TEXT("Try it on a Raspberry"),
     TEXT("Trying to exit vim"),
-    TEXT("Sudo flax --loadproject"),
+    TEXT("sudo flax --project HelloWorld.flaxproj"),
 #elif PLATFORM_MAC
     TEXT("don't compare Macbooks to oranges."),
     TEXT("Why does macbook heat up?\nBecause it doesn't have windows"),
@@ -104,6 +104,7 @@ const Char* SplashScreenQuotes[] =
     TEXT("You have my bow.\nAnd my axe!"),
     TEXT("To the bridge of Khazad-dum."),
     TEXT("One ring to rule them all.\nOne ring to find them."),
+    TEXT("Where there's a whip, there's a way."),
     TEXT("That's what she said"),
     TEXT("We could be compiling shaders here"),
     TEXT("Hello There"),
@@ -164,7 +165,7 @@ void SplashScreen::Show()
     settings.AllowMaximize = false;
     settings.AllowDragAndDrop = false;
     settings.IsTopmost = false;
-    settings.IsRegularWindow = false;
+    settings.Type = WindowType::Utility;
     settings.HasSizingFrame = false;
     settings.ShowAfterFirstPaint = true;
     settings.StartPosition = WindowStartPosition::CenterScreen;

Source/Engine/AI/Behavior.cpp

@@ -7,6 +7,7 @@
 #include "Engine/Engine/Time.h"
 #include "Engine/Engine/EngineService.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Threading/TaskGraph.h"
 
 class BehaviorSystem : public TaskGraphSystem
@@ -38,6 +39,7 @@ TaskGraphSystem* Behavior::System = nullptr;
 void BehaviorSystem::Job(int32 index)
 {
     PROFILE_CPU_NAMED("Behavior.Job");
+    PROFILE_MEM(AI);
     Behaviors[index]->UpdateAsync();
 }
 
@@ -57,6 +59,7 @@ void BehaviorSystem::Execute(TaskGraph* graph)
 
 bool BehaviorService::Init()
 {
+    PROFILE_MEM(AI);
     Behavior::System = New<BehaviorSystem>();
     Engine::UpdateGraph->AddSystem(Behavior::System);
     return false;
@@ -70,9 +73,9 @@ void BehaviorService::Dispose()
 
 Behavior::Behavior(const SpawnParams& params)
     : Script(params)
+    , Tree(this)
 {
     _knowledge.Behavior = this;
-    Tree.Changed.Bind<Behavior, &Behavior::ResetLogic>(this);
 }
 
 void Behavior::UpdateAsync()
@@ -172,6 +175,19 @@ void Behavior::OnDisable()
     BehaviorServiceInstance.UpdateList.Remove(this);
 }
 
+void Behavior::OnAssetChanged(Asset* asset, void* caller)
+{
+    ResetLogic();
+}
+
+void Behavior::OnAssetLoaded(Asset* asset, void* caller)
+{
+}
+
+void Behavior::OnAssetUnloaded(Asset* asset, void* caller)
+{
+}
+
 #if USE_EDITOR
 
 bool Behavior::GetNodeDebugRelevancy(const BehaviorTreeNode* node, const Behavior* behavior)

Source/Engine/AI/Behavior.h

@@ -11,7 +11,7 @@
 /// <summary>
 /// Behavior instance script that runs Behavior Tree execution.
 /// </summary>
-API_CLASS(Attributes="Category(\"Flax Engine\")") class FLAXENGINE_API Behavior : public Script
+API_CLASS(Attributes="Category(\"Flax Engine\")") class FLAXENGINE_API Behavior : public Script, private IAssetReference
 {
     API_AUTO_SERIALIZATION();
     DECLARE_SCRIPTING_TYPE(Behavior);
@@ -92,6 +92,11 @@ public:
     void OnDisable() override;
 
 private:
+    // [IAssetReference]
+    void OnAssetChanged(Asset* asset, void* caller) override;
+    void OnAssetLoaded(Asset* asset, void* caller) override;
+    void OnAssetUnloaded(Asset* asset, void* caller) override;
+
 #if USE_EDITOR
     // Editor-only utilities to debug nodes state.
     API_FUNCTION(Internal) static bool GetNodeDebugRelevancy(const BehaviorTreeNode* node, const Behavior* behavior);

Source/Engine/AI/BehaviorKnowledge.cpp

@@ -4,6 +4,7 @@
 #include "BehaviorTree.h"
 #include "BehaviorTreeNodes.h"
 #include "BehaviorKnowledgeSelector.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Scripting/Scripting.h"
 #include "Engine/Scripting/BinaryModule.h"
 #include "Engine/Scripting/ManagedCLR/MProperty.h"
@@ -144,6 +145,7 @@ BehaviorKnowledge::~BehaviorKnowledge()
 
 void BehaviorKnowledge::InitMemory(BehaviorTree* tree)
 {
+    PROFILE_MEM(AI);
     if (Tree)
         FreeMemory();
     if (!tree)

Source/Engine/AI/BehaviorTree.cpp

@@ -10,6 +10,7 @@
 #include "Engine/Serialization/JsonSerializer.h"
 #include "Engine/Serialization/MemoryReadStream.h"
 #include "Engine/Threading/Threading.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "FlaxEngine.Gen.h"
 #if USE_EDITOR
 #include "Engine/Level/Level.h"
@@ -275,6 +276,7 @@ Asset::LoadResult BehaviorTree::load()
     if (surfaceChunk == nullptr)
         return LoadResult::MissingDataChunk;
     MemoryReadStream surfaceStream(surfaceChunk->Get(), surfaceChunk->Size());
+    PROFILE_MEM(AI);
     if (Graph.Load(&surfaceStream, true))
     {
         LOG(Warning, "Failed to load graph \'{0}\'", ToString());

Source/Engine/Animations/Animations.cpp

@@ -4,6 +4,7 @@
 #include "AnimEvent.h"
 #include "Engine/Engine/Engine.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Level/Actors/AnimatedModel.h"
 #include "Engine/Engine/Time.h"
 #include "Engine/Engine/EngineService.h"
@@ -69,6 +70,7 @@ AnimContinuousEvent::AnimContinuousEvent(const SpawnParams& params)
 
 bool AnimationsService::Init()
 {
+    PROFILE_MEM(Animations);
     Animations::System = New<AnimationsSystem>();
     Engine::UpdateGraph->AddSystem(Animations::System);
     return false;
@@ -83,6 +85,7 @@ void AnimationsService::Dispose()
 void AnimationsSystem::Job(int32 index)
 {
     PROFILE_CPU_NAMED("Animations.Job");
+    PROFILE_MEM(Animations);
     auto animatedModel = AnimationManagerInstance.UpdateList[index];
     if (CanUpdateModel(animatedModel))
     {
@@ -147,6 +150,7 @@ void AnimationsSystem::PostExecute(TaskGraph* graph)
     if (!Active)
         return;
     PROFILE_CPU_NAMED("Animations.PostExecute");
+    PROFILE_MEM(Animations);
 
     // Update gameplay
     for (int32 index = 0; index < AnimationManagerInstance.UpdateList.Count(); index++)

Source/Engine/Animations/Graph/AnimGraph.cpp

@@ -6,6 +6,7 @@
 #include "Engine/Content/Assets/SkinnedModel.h"
 #include "Engine/Graphics/Models/SkeletonData.h"
 #include "Engine/Scripting/Scripting.h"
+#include "Engine/Threading/Threading.h"
 
 extern void RetargetSkeletonPose(const SkeletonData& sourceSkeleton, const SkeletonData& targetSkeleton, const SkinnedModel::SkeletonMapping& mapping, const Transform* sourceNodes, Transform* targetNodes);
 

Source/Engine/Animations/SceneAnimations/SceneAnimation.cpp

@@ -7,6 +7,7 @@
 #include "Engine/Content/Content.h"
 #include "Engine/Content/Deprecated.h"
 #include "Engine/Serialization/MemoryReadStream.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Audio/AudioClip.h"
 #include "Engine/Graphics/PostProcessSettings.h"
 #if USE_EDITOR
@@ -249,6 +250,7 @@ bool SceneAnimation::Save(const StringView& path)
 Asset::LoadResult SceneAnimation::load()
 {
     TrackStatesCount = 0;
+    PROFILE_MEM(AnimationsData);
 
     // Get the data chunk
     if (LoadChunk(0))

Source/Engine/Animations/SceneAnimations/SceneAnimationPlayer.cpp

@@ -12,6 +12,7 @@
 #include "Engine/Audio/AudioSource.h"
 #include "Engine/Graphics/RenderTask.h"
 #include "Engine/Renderer/RenderList.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Scripting/Scripting.h"
 #include "Engine/Scripting/Script.h"
 #include "Engine/Scripting/ManagedCLR/MException.h"
@@ -151,6 +152,7 @@ void SceneAnimationPlayer::Tick(float dt)
     SceneAnimation* anim = Animation.Get();
     if (!anim || !anim->IsLoaded())
         return;
+    PROFILE_MEM(Animations);
 
     // Setup state
     if (_tracks.Count() != anim->TrackStatesCount)
@@ -229,6 +231,7 @@ void SceneAnimationPlayer::MapTrack(const StringView& from, const Guid& to)
     SceneAnimation* anim = Animation.Get();
     if (!anim || !anim->IsLoaded())
         return;
+    PROFILE_MEM(Animations);
     for (int32 j = 0; j < anim->Tracks.Count(); j++)
     {
         const auto& track = anim->Tracks[j];

Source/Engine/Audio/Audio.cpp

@@ -8,6 +8,7 @@
 #include "Engine/Scripting/BinaryModule.h"
 #include "Engine/Level/Level.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Engine/Engine.h"
 #include "Engine/Engine/CommandLine.h"
 #include "Engine/Core/Log.h"
@@ -151,6 +152,7 @@ void Audio::SetEnableHRTF(bool value)
 bool AudioService::Init()
 {
     PROFILE_CPU_NAMED("Audio.Init");
+    PROFILE_MEM(Audio);
     const auto settings = AudioSettings::Get();
     const bool mute = CommandLine::Options.Mute.IsTrue() || settings->DisableAudio;
 
@@ -211,6 +213,7 @@ bool AudioService::Init()
 void AudioService::Update()
 {
     PROFILE_CPU_NAMED("Audio.Update");
+    PROFILE_MEM(Audio);
 
     // Update the master volume
     float masterVolume = MasterVolume;

Source/Engine/Audio/AudioClip.cpp

@@ -10,6 +10,7 @@
 #include "Engine/Scripting/ManagedCLR/MUtils.h"
 #include "Engine/Streaming/StreamingGroup.h"
 #include "Engine/Serialization/MemoryReadStream.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Tools/AudioTool/OggVorbisDecoder.h"
 #include "Engine/Tools/AudioTool/AudioTool.h"
 #include "Engine/Threading/Threading.h"
@@ -18,6 +19,7 @@ REGISTER_BINARY_ASSET_WITH_UPGRADER(AudioClip, "FlaxEngine.AudioClip", AudioClip
 
 bool AudioClip::StreamingTask::Run()
 {
+    PROFILE_MEM(Audio);
     AssetReference<AudioClip> ref = _asset.Get();
     if (ref == nullptr || AudioBackend::Instance == nullptr)
         return true;
@@ -318,6 +320,7 @@ bool AudioClip::init(AssetInitData& initData)
 
 Asset::LoadResult AudioClip::load()
 {
+    PROFILE_MEM(Audio);
 #if !COMPILE_WITH_OGG_VORBIS
     if (AudioHeader.Format == AudioFormat::Vorbis)
     {

Source/Engine/Audio/AudioSource.cpp

@@ -21,9 +21,8 @@ AudioSource::AudioSource(const SpawnParams& params)
     , _playOnStart(false)
     , _startTime(0.0f)
     , _allowSpatialization(true)
+    , Clip(this)
 {
-    Clip.Changed.Bind<AudioSource, &AudioSource::OnClipChanged>(this);
-    Clip.Loaded.Bind<AudioSource, &AudioSource::OnClipLoaded>(this);
 }
 
 void AudioSource::SetVolume(float value)
@@ -264,7 +263,7 @@ void AudioSource::RequestStreamingBuffersUpdate()
     _needToUpdateStreamingBuffers = true;
 }
 
-void AudioSource::OnClipChanged()
+void AudioSource::OnAssetChanged(Asset* asset, void* caller)
 {
     Stop();
 
@@ -276,7 +275,7 @@ void AudioSource::OnClipChanged()
     }
 }
 
-void AudioSource::OnClipLoaded()
+void AudioSource::OnAssetLoaded(Asset* asset, void* caller)
 {
     if (!SourceID)
         return;
@@ -302,6 +301,10 @@ void AudioSource::OnClipLoaded()
     }
 }
 
+void AudioSource::OnAssetUnloaded(Asset* asset, void* caller)
+{
+}
+
 bool AudioSource::UseStreaming() const
 {
     if (Clip == nullptr || Clip->WaitForLoaded())

Source/Engine/Audio/AudioSource.h

@@ -13,7 +13,7 @@
 /// Whether or not an audio source is spatial is controlled by the assigned AudioClip.The volume and the pitch of a spatial audio source is controlled by its position and the AudioListener's position/direction/velocity.
 /// </remarks>
 API_CLASS(Attributes="ActorContextMenu(\"New/Audio/Audio Source\"), ActorToolbox(\"Other\")")
-class FLAXENGINE_API AudioSource : public Actor
+class FLAXENGINE_API AudioSource : public Actor, IAssetReference
 {
     DECLARE_SCENE_OBJECT(AudioSource);
     friend class AudioStreamingHandler;
@@ -293,8 +293,10 @@ public:
     void RequestStreamingBuffersUpdate();
 
 private:
-    void OnClipChanged();
-    void OnClipLoaded();
+    // [IAssetReference]
+    void OnAssetChanged(Asset* asset, void* caller) override;
+    void OnAssetLoaded(Asset* asset, void* caller) override;
+    void OnAssetUnloaded(Asset* asset, void* caller) override;
 
     /// <summary>
     /// Plays the audio source. Should have buffer(s) binded before.

Source/Engine/Audio/OpenAL/AudioBackendOAL.cpp

@@ -9,6 +9,7 @@
 #include "Engine/Tools/AudioTool/AudioTool.h"
 #include "Engine/Engine/Units.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Audio/Audio.h"
 #include "Engine/Audio/AudioListener.h"
 #include "Engine/Audio/AudioSource.h"
@@ -321,6 +322,8 @@ void AudioBackendOAL::Listener_ReinitializeAll()
 
 uint32 AudioBackendOAL::Source_Add(const AudioDataInfo& format, const Vector3& position, const Quaternion& orientation, float volume, float pitch, float pan, bool loop, bool spatial, float attenuation, float minDistance, float doppler)
 {
+    PROFILE_MEM(Audio);
+
     uint32 sourceID = 0;
     ALC::Source::Rebuild(sourceID, position, orientation, volume, pitch, pan, loop, spatial, attenuation, minDistance, doppler);
 
@@ -516,6 +519,7 @@ void AudioBackendOAL::Buffer_Delete(uint32 bufferID)
 void AudioBackendOAL::Buffer_Write(uint32 bufferID, byte* samples, const AudioDataInfo& info)
 {
     PROFILE_CPU();
+    PROFILE_MEM(Audio);
 
     // Pick the format for the audio data (it might not be supported natively)
     ALenum format = GetOpenALBufferFormat(info.NumChannels, info.BitDepth);
@@ -625,6 +629,8 @@ AudioBackend::FeatureFlags AudioBackendOAL::Base_Features()
 
 void AudioBackendOAL::Base_OnActiveDeviceChanged()
 {
+    PROFILE_MEM(Audio);
+
     // Cleanup
     Array<ALC::AudioSourceState> states;
     states.EnsureCapacity(Audio::Sources.Count());

Source/Engine/Audio/XAudio2/AudioBackendXAudio2.cpp

@@ -9,6 +9,7 @@
 #include "Engine/Core/Log.h"
 #include "Engine/Audio/Audio.h"
 #include "Engine/Threading/Threading.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 
 #if PLATFORM_WINDOWS
 // Tweak Win ver
@@ -232,6 +233,7 @@ void AudioBackendXAudio2::Listener_ReinitializeAll()
 
 uint32 AudioBackendXAudio2::Source_Add(const AudioDataInfo& format, const Vector3& position, const Quaternion& orientation, float volume, float pitch, float pan, bool loop, bool spatial, float attenuation, float minDistance, float doppler)
 {
+    PROFILE_MEM(Audio);
     ScopeLock lock(XAudio2::Locker);
 
     // Get first free source
@@ -580,6 +582,7 @@ void AudioBackendXAudio2::Source_DequeueProcessedBuffers(uint32 sourceID)
 
 uint32 AudioBackendXAudio2::Buffer_Create()
 {
+    PROFILE_MEM(Audio);
     uint32 bufferID;
     ScopeLock lock(XAudio2::Locker);
 
@@ -618,6 +621,7 @@ void AudioBackendXAudio2::Buffer_Delete(uint32 bufferID)
 
 void AudioBackendXAudio2::Buffer_Write(uint32 bufferID, byte* samples, const AudioDataInfo& info)
 {
+    PROFILE_MEM(Audio);
     CHECK(info.NumChannels <= MAX_INPUT_CHANNELS);
 
     XAudio2::Locker.Lock();

Source/Engine/Content/Asset.cpp

@@ -9,6 +9,7 @@
 #include "Engine/Core/Log.h"
 #include "Engine/Core/LogContext.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Scripting/ManagedCLR/MCore.h"
 #include "Engine/Threading/MainThreadTask.h"
 #include "Engine/Threading/ThreadLocal.h"
@@ -34,15 +35,18 @@ bool ContentDeprecated::Clear(bool newValue)
 
 #endif
 
+AssetReferenceBase::AssetReferenceBase(IAssetReference* owner)
+    : _owner(owner)
+{
+}
+
 AssetReferenceBase::~AssetReferenceBase()
 {
     Asset* asset = _asset;
     if (asset)
     {
         _asset = nullptr;
-        asset->OnLoaded.Unbind<AssetReferenceBase, &AssetReferenceBase::OnLoaded>(this);
-        asset->OnUnloaded.Unbind<AssetReferenceBase, &AssetReferenceBase::OnUnloaded>(this);
-        asset->RemoveReference();
+        asset->RemoveReference(this);
     }
 }
 
@@ -51,52 +55,60 @@ String AssetReferenceBase::ToString() const
     return _asset ? _asset->ToString() : TEXT("<null>");
 }
 
+void AssetReferenceBase::OnAssetChanged(Asset* asset, void* caller)
+{
+    if (_owner)
+        _owner->OnAssetChanged(asset, this);
+}
+
+void AssetReferenceBase::OnAssetLoaded(Asset* asset, void* caller)
+{
+    if (_asset != asset)
+        return;
+    Loaded();
+    if (_owner)
+        _owner->OnAssetLoaded(asset, this);
+}
+
+void AssetReferenceBase::OnAssetUnloaded(Asset* asset, void* caller)
+{
+    if (_asset != asset)
+        return;
+    Unload();
+    OnSet(nullptr);
+    if (_owner)
+        _owner->OnAssetUnloaded(asset, this);
+}
+
 void AssetReferenceBase::OnSet(Asset* asset)
 {
     auto e = _asset;
     if (e != asset)
     {
         if (e)
-        {
-            e->OnLoaded.Unbind<AssetReferenceBase, &AssetReferenceBase::OnLoaded>(this);
-            e->OnUnloaded.Unbind<AssetReferenceBase, &AssetReferenceBase::OnUnloaded>(this);
-            e->RemoveReference();
-        }
+            e->RemoveReference(this);
         _asset = e = asset;
         if (e)
-        {
-            e->AddReference();
-            e->OnLoaded.Bind<AssetReferenceBase, &AssetReferenceBase::OnLoaded>(this);
-            e->OnUnloaded.Bind<AssetReferenceBase, &AssetReferenceBase::OnUnloaded>(this);
-        }
+            e->AddReference(this);
         Changed();
+        if (_owner)
+            _owner->OnAssetChanged(asset, this);
         if (e && e->IsLoaded())
+        {
             Loaded();
+            if (_owner)
+                _owner->OnAssetLoaded(asset, this);
+        }
     }
 }
 
-void AssetReferenceBase::OnLoaded(Asset* asset)
-{
-    if (_asset != asset)
-        return;
-    Loaded();
-}
-
-void AssetReferenceBase::OnUnloaded(Asset* asset)
-{
-    if (_asset != asset)
-        return;
-    Unload();
-    OnSet(nullptr);
-}
-
 WeakAssetReferenceBase::~WeakAssetReferenceBase()
 {
     Asset* asset = _asset;
     if (asset)
     {
         _asset = nullptr;
-        asset->OnUnloaded.Unbind<WeakAssetReferenceBase, &WeakAssetReferenceBase::OnUnloaded>(this);
+        asset->RemoveReference(this, true);
     }
 }
 
@@ -105,36 +117,43 @@ String WeakAssetReferenceBase::ToString() const
     return _asset ? _asset->ToString() : TEXT("<null>");
 }
 
+void WeakAssetReferenceBase::OnAssetChanged(Asset* asset, void* caller)
+{
+}
+
+void WeakAssetReferenceBase::OnAssetLoaded(Asset* asset, void* caller)
+{
+}
+
+void WeakAssetReferenceBase::OnAssetUnloaded(Asset* asset, void* caller)
+{
+    if (_asset != asset)
+        return;
+    Unload();
+    asset->RemoveReference(this, true);
+    _asset = nullptr;
+}
+
 void WeakAssetReferenceBase::OnSet(Asset* asset)
 {
     auto e = _asset;
     if (e != asset)
     {
         if (e)
-            e->OnUnloaded.Unbind<WeakAssetReferenceBase, &WeakAssetReferenceBase::OnUnloaded>(this);
+            e->RemoveReference(this, true);
         _asset = e = asset;
         if (e)
-            e->OnUnloaded.Bind<WeakAssetReferenceBase, &WeakAssetReferenceBase::OnUnloaded>(this);
+            e->AddReference(this, true);
     }
 }
 
-void WeakAssetReferenceBase::OnUnloaded(Asset* asset)
-{
-    if (_asset != asset)
-        return;
-    Unload();
-    asset->OnUnloaded.Unbind<WeakAssetReferenceBase, &WeakAssetReferenceBase::OnUnloaded>(this);
-    _asset = nullptr;
-}
-
 SoftAssetReferenceBase::~SoftAssetReferenceBase()
 {
     Asset* asset = _asset;
     if (asset)
     {
         _asset = nullptr;
-        asset->OnUnloaded.Unbind<SoftAssetReferenceBase, &SoftAssetReferenceBase::OnUnloaded>(this);
-        asset->RemoveReference();
+        asset->RemoveReference(this);
     }
 #if !BUILD_RELEASE
     _id = Guid::Empty;
@@ -146,22 +165,34 @@ String SoftAssetReferenceBase::ToString() const
     return _asset ? _asset->ToString() : (_id.IsValid() ? _id.ToString() : TEXT("<null>"));
 }
 
+void SoftAssetReferenceBase::OnAssetChanged(Asset* asset, void* caller)
+{
+}
+
+void SoftAssetReferenceBase::OnAssetLoaded(Asset* asset, void* caller)
+{
+}
+
+void SoftAssetReferenceBase::OnAssetUnloaded(Asset* asset, void* caller)
+{
+    if (_asset != asset)
+        return;
+    _asset->RemoveReference(this);
+    _asset = nullptr;
+    _id = Guid::Empty;
+    Changed();
+}
+
 void SoftAssetReferenceBase::OnSet(Asset* asset)
 {
     if (_asset == asset)
         return;
     if (_asset)
-    {
-        _asset->OnUnloaded.Unbind<SoftAssetReferenceBase, &SoftAssetReferenceBase::OnUnloaded>(this);
-        _asset->RemoveReference();
-    }
+        _asset->RemoveReference(this);
     _asset = asset;
     _id = asset ? asset->GetID() : Guid::Empty;
     if (asset)
-    {
-        asset->AddReference();
-        asset->OnUnloaded.Bind<SoftAssetReferenceBase, &SoftAssetReferenceBase::OnUnloaded>(this);
-    }
+        asset->AddReference(this);
     Changed();
 }
 
@@ -170,10 +201,7 @@ void SoftAssetReferenceBase::OnSet(const Guid& id)
     if (_id == id)
         return;
     if (_asset)
-    {
-        _asset->OnUnloaded.Unbind<SoftAssetReferenceBase, &SoftAssetReferenceBase::OnUnloaded>(this);
-        _asset->RemoveReference();
-    }
+        _asset->RemoveReference(this);
     _asset = nullptr;
     _id = id;
     Changed();
@@ -184,21 +212,7 @@ void SoftAssetReferenceBase::OnResolve(const ScriptingTypeHandle& type)
     ASSERT(!_asset);
     _asset = ::LoadAsset(_id, type);
     if (_asset)
-    {
-        _asset->OnUnloaded.Bind<SoftAssetReferenceBase, &SoftAssetReferenceBase::OnUnloaded>(this);
-        _asset->AddReference();
-    }
-}
-
-void SoftAssetReferenceBase::OnUnloaded(Asset* asset)
-{
-    if (_asset != asset)
-        return;
-    _asset->RemoveReference();
-    _asset->OnUnloaded.Unbind<SoftAssetReferenceBase, &SoftAssetReferenceBase::OnUnloaded>(this);
-    _asset = nullptr;
-    _id = Guid::Empty;
-    Changed();
+        _asset->AddReference(this);
 }
 
 Asset::Asset(const SpawnParams& params, const AssetInfo* info)
@@ -216,6 +230,39 @@ int32 Asset::GetReferencesCount() const
     return (int32)Platform::AtomicRead(const_cast<int64 volatile*>(&_refCount));
 }
 
+void Asset::AddReference()
+{
+    Platform::InterlockedIncrement(&_refCount);
+}
+
+void Asset::AddReference(IAssetReference* ref, bool week)
+{
+    if (!week)
+        Platform::InterlockedIncrement(&_refCount);
+    if (ref)
+    {
+        //PROFILE_MEM(EngineDelegate); // Include references tracking memory within Delegate memory
+        ScopeLock lock(_referencesLocker);
+        _references.Add(ref);
+    }
+}
+
+void Asset::RemoveReference()
+{
+    Platform::InterlockedDecrement(&_refCount);
+}
+
+void Asset::RemoveReference(IAssetReference* ref, bool week)
+{
+    if (ref)
+    {
+        ScopeLock lock(_referencesLocker);
+        _references.Remove(ref);
+    }
+    if (!week)
+        Platform::InterlockedDecrement(&_refCount);
+}
+
 String Asset::ToString() const
 {
     return String::Format(TEXT("{0}, {1}, {2}"), GetTypeName(), GetID(), GetPath());
@@ -354,6 +401,7 @@ uint64 Asset::GetMemoryUsage() const
     if (Platform::AtomicRead(&_loadingTask))
         result += sizeof(ContentLoadTask);
     result += (OnLoaded.Capacity() + OnReloading.Capacity() + OnUnloaded.Capacity()) * sizeof(EventType::FunctionType);
+    result += _references.Capacity() * sizeof(HashSet<IAssetReference*>::Bucket);
     Locker.Unlock();
     return result;
 }
@@ -444,6 +492,9 @@ bool Asset::WaitForLoaded(double timeoutInMilliseconds) const
     }
 
     PROFILE_CPU();
+    ZoneColor(TracyWaitZoneColor);
+    const StringView path(GetPath());
+    ZoneText(*path, path.Length());
 
     Content::WaitForTask(loadingTask, timeoutInMilliseconds);
 
@@ -528,6 +579,7 @@ ContentLoadTask* Asset::createLoadingTask()
 
 void Asset::startLoading()
 {
+    PROFILE_MEM(ContentAssets);
     ASSERT(!IsLoaded());
     ASSERT(Platform::AtomicRead(&_loadingTask) == 0);
     auto loadingTask = createLoadingTask();
@@ -627,6 +679,9 @@ void Asset::onLoaded_MainThread()
     ASSERT(IsInMainThread());
 
     // Send event
+    ScopeLock lock(_referencesLocker);
+    for (const auto& e : _references)
+        e.Item->OnAssetLoaded(this, this);
     OnLoaded(this);
 }
 
@@ -640,6 +695,9 @@ void Asset::onUnload_MainThread()
     CancelStreaming();
 
     // Send event
+    ScopeLock lock(_referencesLocker);
+    for (const auto& e : _references)
+        e.Item->OnAssetUnloaded(this, this);
     OnUnloaded(this);
 }
 

Source/Engine/Content/Asset.h

@@ -7,6 +7,7 @@
 #include "Engine/Core/Types/String.h"
 #include "Engine/Platform/CriticalSection.h"
 #include "Engine/Scripting/ScriptingObject.h"
+#include "Engine/Threading/ConcurrentSystemLocker.h"
 #include "Config.h"
 #include "Types.h"
 
@@ -18,6 +19,20 @@
 	public: \
 	explicit type(const SpawnParams& params, const AssetInfo* info)
 
+// Utility interface for objects that reference asset and want to get notified about asset reference changes.
+class FLAXENGINE_API IAssetReference
+{
+public:
+    virtual ~IAssetReference() = default;
+
+    // Asset reference got changed.
+    virtual void OnAssetChanged(Asset* asset, void* caller) = 0;
+    // Asset got loaded.
+    virtual void OnAssetLoaded(Asset* asset, void* caller) = 0;
+    // Asset gets unloaded.
+    virtual void OnAssetUnloaded(Asset* asset, void* caller) = 0;
+};
+
 /// <summary>
 /// Asset objects base class.
 /// </summary>
@@ -48,6 +63,9 @@ protected:
     int8 _deleteFileOnUnload : 1; // Indicates that asset source file should be removed on asset unload
     int8 _isVirtual : 1; // Indicates that asset is pure virtual (generated or temporary, has no storage so won't be saved)
 
+    HashSet<IAssetReference*> _references;
+    CriticalSection _referencesLocker; // TODO: convert into a single interlocked exchange for the current thread owning lock
+
 public:
     /// <summary>
     /// Initializes a new instance of the <see cref="Asset"/> class.
@@ -88,18 +106,22 @@ public:
     /// <summary>
     /// Adds reference to that asset.
     /// </summary>
-    FORCE_INLINE void AddReference()
-    {
-        Platform::InterlockedIncrement(&_refCount);
-    }
+    void AddReference();
+
+    /// <summary>
+    /// Adds reference to that asset.
+    /// </summary>
+    void AddReference(IAssetReference* ref, bool week = false);
 
     /// <summary>
     /// Removes reference from that asset.
     /// </summary>
-    FORCE_INLINE void RemoveReference()
-    {
-        Platform::InterlockedDecrement(&_refCount);
-    }
+    void RemoveReference();
+
+    /// <summary>
+    /// Removes reference from that asset.
+    /// </summary>
+    void RemoveReference(IAssetReference* ref, bool week = false);
 
 public:
     /// <summary>

Source/Engine/Content/AssetReference.h

@@ -7,10 +7,11 @@
 /// <summary>
 /// Asset reference utility. Keeps reference to the linked asset object and handles load/unload events.
 /// </summary>
-class FLAXENGINE_API AssetReferenceBase
+class FLAXENGINE_API AssetReferenceBase : public IAssetReference
 {
 protected:
     Asset* _asset = nullptr;
+    IAssetReference* _owner = nullptr;
 
 public:
     /// <summary>
@@ -36,6 +37,12 @@ public:
     /// </summary>
     AssetReferenceBase() = default;
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="AssetReferenceBase"/> class.
+    /// </summary>
+    /// <param name="owner">The reference owner to keep notified about asset changes.</param>
+    AssetReferenceBase(IAssetReference* owner);
+
     /// <summary>
     /// Finalizes an instance of the <see cref="AssetReferenceBase"/> class.
     /// </summary>
@@ -63,10 +70,14 @@ public:
     /// </summary>
     String ToString() const;
 
+public:
+    // [IAssetReference]
+    void OnAssetChanged(Asset* asset, void* caller) override;
+    void OnAssetLoaded(Asset* asset, void* caller) override;
+    void OnAssetUnloaded(Asset* asset, void* caller) override;
+
 protected:
     void OnSet(Asset* asset);
-    void OnLoaded(Asset* asset);
-    void OnUnloaded(Asset* asset);
 };
 
 /// <summary>
@@ -87,6 +98,13 @@ public:
     {
     }
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="AssetReference"/> class.
+    /// </summary>
+    explicit AssetReference(decltype(__nullptr))
+    {
+    }
+
     /// <summary>
     /// Initializes a new instance of the <see cref="AssetReference"/> class.
     /// </summary>
@@ -96,6 +114,15 @@ public:
         OnSet((Asset*)asset);
     }
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="AssetReference"/> class.
+    /// </summary>
+    /// <param name="owner">The reference owner to keep notified about asset changes.</param>
+    explicit AssetReference(IAssetReference* owner)
+        : AssetReferenceBase(owner)
+    {
+    }
+
     /// <summary>
     /// Initializes a new instance of the <see cref="AssetReference"/> class.
     /// </summary>

Source/Engine/Content/Assets/Animation.cpp

@@ -9,6 +9,7 @@
 #include "Engine/Animations/Animations.h"
 #include "Engine/Animations/SceneAnimations/SceneAnimation.h"
 #include "Engine/Scripting/Scripting.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Threading/Threading.h"
 #include "Engine/Serialization/MemoryReadStream.h"
 #if USE_EDITOR
@@ -598,6 +599,7 @@ void Animation::OnScriptingDispose()
 
 Asset::LoadResult Animation::load()
 {
+    PROFILE_MEM(AnimationsData);
     ConcurrentSystemLocker::WriteScope systemScope(Animations::SystemLocker);
 
     // Get stream with animations data

Source/Engine/Content/Assets/AnimationGraph.cpp

@@ -9,6 +9,7 @@
 #include "Engine/Core/Types/DataContainer.h"
 #include "Engine/Serialization/MemoryReadStream.h"
 #include "Engine/Serialization/MemoryWriteStream.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Content/Factories/BinaryAssetFactory.h"
 #include "Engine/Animations/Animations.h"
 #include "Engine/Threading/Threading.h"
@@ -25,6 +26,7 @@ AnimationGraph::AnimationGraph(const SpawnParams& params, const AssetInfo* info)
 
 Asset::LoadResult AnimationGraph::load()
 {
+    PROFILE_MEM(AnimationsData);
     ConcurrentSystemLocker::WriteScope systemScope(Animations::SystemLocker);
 
     // Get stream with graph data
@@ -83,6 +85,7 @@ bool AnimationGraph::InitAsAnimation(SkinnedModel* baseModel, Animation* anim, b
         Log::ArgumentNullException();
         return true;
     }
+    PROFILE_MEM(AnimationsData);
     ConcurrentSystemLocker::WriteScope systemScope(Animations::SystemLocker);
 
     // Create Graph data

Source/Engine/Content/Assets/AnimationGraphFunction.cpp

@@ -8,6 +8,7 @@
 #include "Engine/Serialization/MemoryWriteStream.h"
 #endif
 #include "Engine/Animations/Animations.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Content/Factories/BinaryAssetFactory.h"
 #include "Engine/Threading/Threading.h"
 
@@ -20,6 +21,7 @@ AnimationGraphFunction::AnimationGraphFunction(const SpawnParams& params, const
 
 Asset::LoadResult AnimationGraphFunction::load()
 {
+    PROFILE_MEM(AnimationsData);
     ConcurrentSystemLocker::WriteScope systemScope(Animations::SystemLocker);
 
     // Get graph data from chunk

Source/Engine/Content/Assets/Material.cpp

@@ -165,9 +165,13 @@ Asset::LoadResult Material::load()
         MaterialGenerator generator;
         generator.Error.Bind(&OnGeneratorError);
         if (_shaderHeader.Material.GraphVersion != MATERIAL_GRAPH_VERSION)
+        {
             LOG(Info, "Converting material \'{0}\', from version {1} to {2}...", name, _shaderHeader.Material.GraphVersion, MATERIAL_GRAPH_VERSION);
+        }
         else
+        {
             LOG(Info, "Updating material \'{0}\'...", name);
+        }
 
         // Load or create material surface
         MaterialLayer* layer;
@@ -410,16 +414,18 @@ void Material::InitCompilationOptions(ShaderCompilationOptions& options)
     // Prepare
     auto& info = _shaderHeader.Material.Info;
     const bool isSurfaceOrTerrainOrDeformable = info.Domain == MaterialDomain::Surface || info.Domain == MaterialDomain::Terrain || info.Domain == MaterialDomain::Deformable;
+    const bool isOpaque = info.BlendMode == MaterialBlendMode::Opaque;
     const bool useCustomData = info.ShadingModel == MaterialShadingModel::Subsurface || info.ShadingModel == MaterialShadingModel::Foliage;
-    const bool useForward = ((info.Domain == MaterialDomain::Surface || info.Domain == MaterialDomain::Deformable) && info.BlendMode != MaterialBlendMode::Opaque) || info.Domain == MaterialDomain::Particle;
+    const bool useForward = ((info.Domain == MaterialDomain::Surface || info.Domain == MaterialDomain::Deformable) && !isOpaque) || info.Domain == MaterialDomain::Particle;
     const bool useTess =
             info.TessellationMode != TessellationMethod::None &&
             RenderTools::CanSupportTessellation(options.Profile) && isSurfaceOrTerrainOrDeformable;
     const bool useDistortion =
             (info.Domain == MaterialDomain::Surface || info.Domain == MaterialDomain::Deformable || info.Domain == MaterialDomain::Particle) &&
-            info.BlendMode != MaterialBlendMode::Opaque &&
+            !isOpaque &&
             EnumHasAnyFlags(info.UsageFlags, MaterialUsageFlags::UseRefraction) &&
             (info.FeaturesFlags & MaterialFeaturesFlags::DisableDistortion) == MaterialFeaturesFlags::None;
+    const MaterialShadingModel shadingModel = info.ShadingModel == MaterialShadingModel::CustomLit ? MaterialShadingModel::Unlit : info.ShadingModel;
 
     // @formatter:off
     static const char* Numbers[] =
@@ -431,7 +437,7 @@ void Material::InitCompilationOptions(ShaderCompilationOptions& options)
     // Setup shader macros
     options.Macros.Add({ "MATERIAL_DOMAIN", Numbers[(int32)info.Domain] });
     options.Macros.Add({ "MATERIAL_BLEND", Numbers[(int32)info.BlendMode] });
-    options.Macros.Add({ "MATERIAL_SHADING_MODEL", Numbers[(int32)info.ShadingModel] });
+    options.Macros.Add({ "MATERIAL_SHADING_MODEL", Numbers[(int32)shadingModel] });
     options.Macros.Add({ "MATERIAL_MASKED", Numbers[EnumHasAnyFlags(info.UsageFlags, MaterialUsageFlags::UseMask) ? 1 : 0] });
     options.Macros.Add({ "DECAL_BLEND_MODE", Numbers[(int32)info.DecalBlendingMode] });
     options.Macros.Add({ "USE_EMISSIVE", Numbers[EnumHasAnyFlags(info.UsageFlags, MaterialUsageFlags::UseEmissive) ? 1 : 0] });
@@ -488,7 +494,7 @@ void Material::InitCompilationOptions(ShaderCompilationOptions& options)
     options.Macros.Add({ "IS_PARTICLE", Numbers[info.Domain == MaterialDomain::Particle ? 1 : 0] });
     options.Macros.Add({ "IS_DEFORMABLE", Numbers[info.Domain == MaterialDomain::Deformable ? 1 : 0] });
     options.Macros.Add({ "USE_FORWARD", Numbers[useForward ? 1 : 0] });
-    options.Macros.Add({ "USE_DEFERRED", Numbers[isSurfaceOrTerrainOrDeformable && info.BlendMode == MaterialBlendMode::Opaque ? 1 : 0] });
+    options.Macros.Add({ "USE_DEFERRED", Numbers[isSurfaceOrTerrainOrDeformable && isOpaque ? 1 : 0] });
     options.Macros.Add({ "USE_DISTORTION", Numbers[useDistortion ? 1 : 0] });
 #endif
 }

Source/Engine/Content/Assets/Model.cpp

@@ -18,6 +18,7 @@
 #include "Engine/Graphics/Models/MeshDeformation.h"
 #include "Engine/Graphics/Textures/GPUTexture.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Renderer/DrawCall.h"
 #include "Engine/Threading/Threading.h"
 #include "Engine/Tools/ModelTool/ModelTool.h"
@@ -304,6 +305,7 @@ bool Model::Init(const Span<int32>& meshesCountPerLod)
         Log::ArgumentOutOfRangeException();
         return true;
     }
+    PROFILE_MEM(GraphicsMeshes);
 
     // Dispose previous data and disable streaming (will start data uploading tasks manually)
     StopStreaming();
@@ -343,6 +345,7 @@ bool Model::Init(const Span<int32>& meshesCountPerLod)
 
 bool Model::LoadHeader(ReadStream& stream, byte& headerVersion)
 {
+    PROFILE_MEM(GraphicsMeshes);
     if (ModelBase::LoadHeader(stream, headerVersion))
         return true;
     
@@ -509,6 +512,7 @@ bool Model::Save(bool withMeshDataFromGpu, Function<FlaxChunk*(int32)>& getChunk
 
 void Model::SetupMaterialSlots(int32 slotsCount)
 {
+    PROFILE_MEM(GraphicsMeshes);
     ModelBase::SetupMaterialSlots(slotsCount);
 
     // Adjust meshes indices for slots
@@ -584,6 +588,8 @@ int32 Model::GetAllocatedResidency() const
 
 Asset::LoadResult Model::load()
 {
+    PROFILE_MEM(GraphicsMeshes);
+
     // Get header chunk
     auto chunk0 = GetChunk(0);
     if (chunk0 == nullptr || chunk0->IsMissing())

Source/Engine/Content/Assets/ModelBase.cpp

@@ -5,10 +5,12 @@
 #include "Engine/Core/Math/Transform.h"
 #include "Engine/Content/WeakAssetReference.h"
 #include "Engine/Serialization/MemoryReadStream.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Graphics/Config.h"
 #include "Engine/Graphics/Models/MeshBase.h"
 #include "Engine/Graphics/Models/MeshDeformation.h"
 #include "Engine/Graphics/Shaders/GPUVertexLayout.h"
+#include "Engine/Threading/Threading.h"
 #if GPU_ENABLE_ASYNC_RESOURCES_CREATION
 #include "Engine/Threading/ThreadPoolTask.h"
 #define STREAM_TASK_BASE ThreadPoolTask
@@ -51,6 +53,7 @@ public:
         AssetReference<ModelBase> model = _model.Get();
         if (model == nullptr)
             return true;
+        PROFILE_MEM(GraphicsMeshes);
 
         // Get data
         BytesContainer data;
@@ -334,6 +337,8 @@ bool ModelBase::LoadHeader(ReadStream& stream, byte& headerVersion)
 
 bool ModelBase::LoadMesh(MemoryReadStream& stream, byte meshVersion, MeshBase* mesh, MeshData* dataIfReadOnly)
 {
+    PROFILE_MEM(GraphicsMeshes);
+
     // Load descriptor
     static_assert(MODEL_MESH_VERSION == 2, "Update code");
     uint32 vertices, triangles;

Source/Engine/Content/Assets/SkeletonMask.cpp

@@ -6,6 +6,7 @@
 #include "Engine/Serialization/MemoryWriteStream.h"
 #include "Engine/Content/Factories/BinaryAssetFactory.h"
 #include "Engine/Content/Upgraders/SkeletonMaskUpgrader.h"
+#include "Engine/Threading/Threading.h"
 
 REGISTER_BINARY_ASSET_WITH_UPGRADER(SkeletonMask, "FlaxEngine.SkeletonMask", SkeletonMaskUpgrader, true);
 

Source/Engine/Content/Assets/SkinnedModel.cpp

@@ -18,6 +18,7 @@
 #include "Engine/Content/Upgraders/SkinnedModelAssetUpgrader.h"
 #include "Engine/Debug/Exceptions/ArgumentOutOfRangeException.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Renderer/DrawCall.h"
 #if USE_EDITOR
 #include "Engine/Graphics/Models/ModelData.h"
@@ -458,6 +459,7 @@ bool SkinnedModel::Init(const Span<int32>& meshesCountPerLod)
         Log::ArgumentOutOfRangeException();
         return true;
     }
+    PROFILE_MEM(GraphicsMeshes);
 
     // Dispose previous data and disable streaming (will start data uploading tasks manually)
     StopStreaming();
@@ -501,6 +503,7 @@ void BlendShape::LoadHeader(ReadStream& stream, byte headerVersion)
 
 void BlendShape::Load(ReadStream& stream, byte meshVersion)
 {
+    PROFILE_MEM(GraphicsMeshes);
     UseNormals = stream.ReadBool();
     stream.ReadUint32(&MinVertexIndex);
     stream.ReadUint32(&MaxVertexIndex);
@@ -531,6 +534,7 @@ void BlendShape::Save(WriteStream& stream) const
 
 bool SkinnedModel::LoadMesh(MemoryReadStream& stream, byte meshVersion, MeshBase* mesh, MeshData* dataIfReadOnly)
 {
+    PROFILE_MEM(GraphicsMeshes);
     if (ModelBase::LoadMesh(stream, meshVersion, mesh, dataIfReadOnly))
         return true;
     static_assert(MODEL_MESH_VERSION == 2, "Update code");
@@ -560,6 +564,7 @@ bool SkinnedModel::LoadMesh(MemoryReadStream& stream, byte meshVersion, MeshBase
 
 bool SkinnedModel::LoadHeader(ReadStream& stream, byte& headerVersion)
 {
+    PROFILE_MEM(GraphicsMeshes);
     if (ModelBase::LoadHeader(stream, headerVersion))
         return true;
     static_assert(MODEL_HEADER_VERSION == 2, "Update code");
@@ -861,6 +866,7 @@ uint64 SkinnedModel::GetMemoryUsage() const
 
 void SkinnedModel::SetupMaterialSlots(int32 slotsCount)
 {
+    PROFILE_MEM(GraphicsMeshes);
     ModelBase::SetupMaterialSlots(slotsCount);
 
     // Adjust meshes indices for slots
@@ -954,6 +960,7 @@ Asset::LoadResult SkinnedModel::load()
     if (chunk0 == nullptr || chunk0->IsMissing())
         return LoadResult::MissingDataChunk;
     MemoryReadStream headerStream(chunk0->Get(), chunk0->Size());
+    PROFILE_MEM(GraphicsMeshes);
 
     // Load asset data (anything but mesh contents that use streaming)
     byte headerVersion;

Source/Engine/Content/Assets/VisualScript.cpp

@@ -18,6 +18,7 @@
 #include "Engine/Serialization/Serialization.h"
 #include "Engine/Serialization/JsonWriter.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Utilities/StringConverter.h"
 #include "Engine/Threading/MainThreadTask.h"
 #include "Engine/Level/SceneObject.h"
@@ -37,10 +38,12 @@ namespace
 
     void PrintStack(LogType type)
     {
+#if LOG_ENABLE
         const String stack = VisualScripting::GetStackTrace();
         Log::Logger::Write(type, TEXT("Visual Script stack trace:"));
         Log::Logger::Write(type, stack);
         Log::Logger::Write(type, TEXT(""));
+#endif
     }
 
     bool SerializeValue(const Variant& a, const Variant& b)
@@ -1340,6 +1343,8 @@ bool VisualScript::Save(const StringView& path)
 
 Asset::LoadResult VisualScript::load()
 {
+    PROFILE_MEM(ScriptingVisual);
+
     // Build Visual Script typename that is based on asset id
     String typeName = _id.ToString();
     StringUtils::ConvertUTF162ANSI(typeName.Get(), _typenameChars, 32);
@@ -1532,6 +1537,7 @@ Asset::LoadResult VisualScript::load()
 
 void VisualScript::unload(bool isReloading)
 {
+    PROFILE_MEM(ScriptingVisual);
 #if USE_EDITOR
     if (isReloading)
     {
@@ -1588,6 +1594,7 @@ AssetChunksFlag VisualScript::getChunksToPreload() const
 
 void VisualScript::CacheScriptingType()
 {
+    PROFILE_MEM(ScriptingVisual);
     ScopeLock lock(VisualScriptingBinaryModule::Locker);
     auto& binaryModule = VisualScriptingModule;
 
@@ -1723,6 +1730,7 @@ ScriptingObject* VisualScriptingBinaryModule::VisualScriptObjectSpawn(const Scri
     VisualScript* visualScript = VisualScriptingModule.Scripts[params.Type.TypeIndex];
 
     // Initialize instance data
+    PROFILE_MEM(ScriptingVisual);
     ScopeLock lock(visualScript->Locker);
     auto& instanceParams = visualScript->_instances[object->GetID()].Params;
     instanceParams.Resize(visualScript->Graph.Parameters.Count());
@@ -1747,6 +1755,8 @@ ScriptingObject* VisualScriptingBinaryModule::VisualScriptObjectSpawn(const Scri
 
 void VisualScriptingBinaryModule::OnScriptsReloading()
 {
+    PROFILE_MEM(ScriptingVisual);
+
     // Clear any cached types from that module across all loaded Visual Scripts
     for (auto& script : Scripts)
     {
@@ -1795,6 +1805,7 @@ void VisualScriptingBinaryModule::OnScriptsReloading()
 
 void VisualScriptingBinaryModule::OnEvent(ScriptingObject* object, Span<Variant> parameters, ScriptingTypeHandle eventType, StringView eventName)
 {
+    PROFILE_MEM(ScriptingVisual);
     if (object)
     {
         // Object event
@@ -1900,9 +1911,13 @@ bool VisualScriptingBinaryModule::InvokeMethod(void* method, const Variant& inst
         if (!instanceObject || instanceObject->GetTypeHandle() != vsMethod->Script->GetScriptingType())
         {
             if (!instanceObject)
+            {
                 LOG(Error, "Failed to call method '{0}.{1}' (args count: {2}) without object instance", String(vsMethod->Script->GetScriptTypeName()), String(vsMethod->Name), vsMethod->ParamNames.Count());
+            }
             else
+            {
                 LOG(Error, "Failed to call method '{0}.{1}' (args count: {2}) with invalid object instance of type '{3}'", String(vsMethod->Script->GetScriptTypeName()), String(vsMethod->Name), vsMethod->ParamNames.Count(), String(instanceObject->GetType().Fullname));
+            }
             return true;
         }
     }
@@ -1952,6 +1967,7 @@ bool VisualScriptingBinaryModule::GetFieldValue(void* field, const Variant& inst
 
 bool VisualScriptingBinaryModule::SetFieldValue(void* field, const Variant& instance, Variant& value)
 {
+    PROFILE_MEM(ScriptingVisual);
     const auto vsFiled = (VisualScript::Field*)field;
     const auto instanceObject = (ScriptingObject*)instance;
     if (!instanceObject)
@@ -2038,6 +2054,7 @@ void VisualScriptingBinaryModule::SerializeObject(JsonWriter& stream, ScriptingO
 
 void VisualScriptingBinaryModule::DeserializeObject(ISerializable::DeserializeStream& stream, ScriptingObject* object, ISerializeModifier* modifier)
 {
+    PROFILE_MEM(ScriptingVisual);
     ASSERT(stream.IsObject());
     Locker.Lock();
     const auto asset = Scripts[object->GetTypeHandle().TypeIndex].Get();
@@ -2161,6 +2178,7 @@ const Variant& VisualScript::GetScriptInstanceParameterValue(const StringView& n
 
 void VisualScript::SetScriptInstanceParameterValue(const StringView& name, ScriptingObject* instance, const Variant& value)
 {
+    PROFILE_MEM(ScriptingVisual);
     CHECK(instance);
     for (int32 paramIndex = 0; paramIndex < Graph.Parameters.Count(); paramIndex++)
     {
@@ -2182,6 +2200,7 @@ void VisualScript::SetScriptInstanceParameterValue(const StringView& name, Scrip
 
 void VisualScript::SetScriptInstanceParameterValue(const StringView& name, ScriptingObject* instance, Variant&& value)
 {
+    PROFILE_MEM(ScriptingVisual);
     CHECK(instance);
     for (int32 paramIndex = 0; paramIndex < Graph.Parameters.Count(); paramIndex++)
     {
@@ -2379,6 +2398,7 @@ VisualScriptingBinaryModule* VisualScripting::GetBinaryModule()
 
 Variant VisualScripting::Invoke(VisualScript::Method* method, ScriptingObject* instance, Span<Variant> parameters)
 {
+    PROFILE_MEM(ScriptingVisual);
     CHECK_RETURN(method && method->Script->IsLoaded(), Variant::Zero);
     PROFILE_CPU_SRC_LOC(method->ProfilerData);
 
@@ -2419,6 +2439,7 @@ bool VisualScripting::Evaluate(VisualScript* script, ScriptingObject* instance,
     const auto box = node->GetBox(boxId);
     if (!box)
         return false;
+    PROFILE_MEM(ScriptingVisual);
 
     // Add to the calling stack
     ScopeContext scope;

Source/Engine/Content/BinaryAsset.cpp

@@ -10,6 +10,7 @@
 #include "Engine/Serialization/JsonTools.h"
 #include "Engine/Debug/Exceptions/JsonParseException.h"
 #include "Engine/Threading/ThreadPoolTask.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #if USE_EDITOR
 #include "Engine/Platform/FileSystem.h"
 #include "Engine/Threading/Threading.h"
@@ -527,6 +528,7 @@ protected:
         auto storage = ref->Storage;
         auto factory = (BinaryAssetFactoryBase*)Content::GetAssetFactory(ref->GetTypeName());
         ASSERT(factory);
+        PROFILE_MEM(ContentAssets);
 
         // Here we should open storage and extract AssetInitData
         // This would also allow to convert/upgrade data

Source/Engine/Content/Content.cpp

@@ -28,6 +28,7 @@
 #include "Engine/Engine/Globals.h"
 #include "Engine/Level/Types.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Scripting/ManagedCLR/MClass.h"
 #include "Engine/Scripting/Scripting.h"
 #if USE_EDITOR
@@ -117,6 +118,8 @@ ContentService ContentServiceInstance;
 
 bool ContentService::Init()
 {
+    PROFILE_MEM(Content);
+
     // Load assets registry
     Cache.Init();
 
@@ -159,6 +162,7 @@ void ContentService::Update()
 void ContentService::LateUpdate()
 {
     PROFILE_CPU();
+    PROFILE_MEM(Content);
 
     // Check if need to perform an update of unloading assets
     const TimeSpan timeNow = Time::Update.UnscaledTime;
@@ -324,6 +328,7 @@ String LoadingThread::ToString() const
 
 int32 LoadingThread::Run()
 {
+    PROFILE_MEM(Content);
 #if USE_EDITOR && PLATFORM_WINDOWS
     // Initialize COM
     // TODO: maybe add sth to Thread::Create to indicate that thread will use COM stuff
@@ -416,6 +421,7 @@ bool Content::GetAssetInfo(const Guid& id, AssetInfo& info)
     if (Cache.FindAsset(id, info))
         return true;
     PROFILE_CPU();
+    PROFILE_MEM(Content);
 
     // Locking injects some stalls but we need to make it safe (only one thread can pass though it at once)
     ScopeLock lock(WorkspaceDiscoveryLocker);
@@ -465,6 +471,7 @@ bool Content::GetAssetInfo(const StringView& path, AssetInfo& info)
     if (!FileSystem::FileExists(path))
         return false;
     PROFILE_CPU();
+    PROFILE_MEM(Content);
 
     const auto extension = FileSystem::GetExtension(path).ToLower();
 
@@ -593,6 +600,7 @@ Asset* Content::LoadAsyncInternal(const StringView& internalPath, const MClass*
 
 Asset* Content::LoadAsyncInternal(const StringView& internalPath, const ScriptingTypeHandle& type)
 {
+    PROFILE_MEM(Content);
 #if USE_EDITOR
     const String path = Globals::EngineContentFolder / internalPath + ASSET_FILES_EXTENSION_WITH_DOT;
     if (!FileSystem::FileExists(path))
@@ -635,6 +643,8 @@ Asset* Content::LoadAsync(const StringView& path, const MClass* type)
 
 Asset* Content::LoadAsync(const StringView& path, const ScriptingTypeHandle& type)
 {
+    PROFILE_MEM(Content);
+
     // Ensure path is in a valid format
     String pathNorm(path);
     ContentStorageManager::FormatPath(pathNorm);
@@ -687,7 +697,6 @@ Asset* Content::GetAsset(const StringView& outputPath)
 {
     if (outputPath.IsEmpty())
         return nullptr;
-
     ScopeLock lock(AssetsLocker);
     for (auto i = Assets.Begin(); i.IsNotEnd(); ++i)
     {
@@ -791,6 +800,23 @@ void Content::deleteFileSafety(const StringView& path, const Guid& id)
 #endif
 }
 
+#if !COMPILE_WITHOUT_CSHARP
+
+#include "Engine/Scripting/ManagedCLR/MUtils.h"
+
+void* Content::GetAssetsInternal()
+{
+    AssetsLocker.Lock();
+    MArray* result = MCore::Array::New(Asset::TypeInitializer.GetClass(), Assets.Count());
+    int32 i = 0;
+    for (const auto& e : Assets)
+        MCore::GC::WriteArrayRef(result, e.Value->GetOrCreateManagedInstance(), i++);
+    AssetsLocker.Unlock();
+    return result;
+}
+
+#endif
+
 #if USE_EDITOR
 
 bool Content::RenameAsset(const StringView& oldPath, const StringView& newPath)
@@ -1023,6 +1049,7 @@ Asset* Content::CreateVirtualAsset(const MClass* type)
 Asset* Content::CreateVirtualAsset(const ScriptingTypeHandle& type)
 {
     PROFILE_CPU();
+    PROFILE_MEM(Content);
     auto& assetType = type.GetType();
 
     // Init mock asset info
@@ -1045,7 +1072,9 @@ Asset* Content::CreateVirtualAsset(const ScriptingTypeHandle& type)
     }
 
     // Create asset object
+    PROFILE_MEM_BEGIN(ContentAssets);
     auto asset = factory->NewVirtual(info);
+    PROFILE_MEM_END();
     if (asset == nullptr)
     {
         LOG(Error, "Cannot create virtual asset object.");
@@ -1054,7 +1083,9 @@ Asset* Content::CreateVirtualAsset(const ScriptingTypeHandle& type)
     asset->RegisterObject();
 
     // Call initializer function
+    PROFILE_MEM_BEGIN(ContentAssets);
     asset->InitAsVirtual();
+    PROFILE_MEM_END();
 
     // Register asset
     AssetsLocker.Lock();
@@ -1097,6 +1128,8 @@ void Content::WaitForTask(ContentLoadTask* loadingTask, double timeoutInMillisec
                             localQueue.Clear();
                         }
 
+                        PROFILE_CPU_NAMED("Inline");
+                        ZoneColor(0xffaaaaaa);
                         thread->Run(tmp);
                     }
                     else
@@ -1209,6 +1242,7 @@ Asset* Content::LoadAsync(const Guid& id, const ScriptingTypeHandle& type)
 {
     if (!id.IsValid())
         return nullptr;
+    PROFILE_MEM(Content);
 
     // Check if asset has been already loaded
     Asset* result = nullptr;
@@ -1277,7 +1311,9 @@ Asset* Content::LoadAsync(const Guid& id, const ScriptingTypeHandle& type)
     }
 
     // Create asset object
+    PROFILE_MEM_BEGIN(ContentAssets);
     result = factory->New(assetInfo);
+    PROFILE_MEM_END();
     if (result == nullptr)
     {
         LOG(Error, "Cannot create asset object. Info: {0}", assetInfo.ToString());

Source/Engine/Content/Content.cs

@@ -1,5 +1,6 @@
 // Copyright (c) Wojciech Figat. All rights reserved.
 
+using FlaxEngine.Interop;
 using System;
 using System.Runtime.CompilerServices;
 
@@ -7,6 +8,33 @@ namespace FlaxEngine
 {
     partial class Content
     {
+        /// <summary>
+        /// Gets the assets (loaded or during load).
+        /// </summary>
+        public static Asset[] Assets
+        {
+            get
+            {
+                IntPtr ptr = Internal_GetAssetsInternal();
+                ManagedArray array = Unsafe.As<ManagedArray>(ManagedHandle.FromIntPtr(ptr).Target);
+                return NativeInterop.GCHandleArrayToManagedArray<Asset>(array);
+            }
+        }
+
+        /// <summary>
+        /// Gets the assets (loaded or during load).
+        /// </summary>
+        /// <param name="buffer">Output buffer to fill with asset pointers. Can be provided by a user to avoid memory allocation. Buffer might be larger than actual list size. Use <paramref name="count"/> for actual item count.></param>
+        /// <param name="count">Amount of valid items inside <paramref name="buffer"/>.</param>
+        public static void GetAssets(ref Asset[] buffer, out int count)
+        {
+            count = 0;
+            IntPtr ptr = Internal_GetAssetsInternal();
+            ManagedArray array = Unsafe.As<ManagedArray>(ManagedHandle.FromIntPtr(ptr).Target);
+            buffer = NativeInterop.GCHandleArrayToManagedArray<Asset>(array, buffer);
+            count = buffer.Length;
+        }
+
         /// <summary>
         /// Loads asset to the Content Pool and holds it until it won't be referenced by any object. Returns null if asset is missing. Actual asset data loading is performed on a other thread in async.
         /// </summary>

Source/Engine/Content/Content.h

@@ -122,7 +122,7 @@ public:
     /// Gets the assets (loaded or during load).
     /// </summary>
     /// <returns>The collection of assets.</returns>
-    API_PROPERTY() static Array<Asset*, HeapAllocation> GetAssets();
+    static Array<Asset*, HeapAllocation> GetAssets();
 
     /// <summary>
     /// Gets the raw dictionary of assets (loaded or during load).
@@ -368,4 +368,9 @@ private:
     static void onAssetUnload(Asset* asset);
     static void onAssetChangeId(Asset* asset, const Guid& oldId, const Guid& newId);
     static void deleteFileSafety(const StringView& path, const Guid& id);
+
+    // Internal bindings
+#if !COMPILE_WITHOUT_CSHARP
+    API_FUNCTION(NoProxy) static void* GetAssetsInternal();
+#endif
 };

Source/Engine/Content/JsonAsset.cpp

@@ -20,6 +20,7 @@
 #include "Engine/Core/Cache.h"
 #include "Engine/Debug/Exceptions/JsonParseException.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Scripting/Scripting.h"
 #include "Engine/Scripting/ManagedCLR/MClass.h"
 #include "Engine/Scripting/ManagedCLR/MField.h"
@@ -39,6 +40,7 @@ String JsonAssetBase::GetData() const
     if (Data == nullptr)
         return String::Empty;
     PROFILE_CPU_NAMED("JsonAsset.GetData");
+    PROFILE_MEM(ContentAssets);
     rapidjson_flax::StringBuffer buffer;
     OnGetData(buffer);
     return String((const char*)buffer.GetString(), (int32)buffer.GetSize());
@@ -49,6 +51,7 @@ void JsonAssetBase::SetData(const StringView& value)
     if (!IsLoaded())
         return;
     PROFILE_CPU_NAMED("JsonAsset.SetData");
+    PROFILE_MEM(ContentAssets);
     const StringAnsi dataJson(value);
     ScopeLock lock(Locker);
     const StringView dataTypeName = DataTypeName;
@@ -60,6 +63,7 @@ void JsonAssetBase::SetData(const StringView& value)
 
 bool JsonAssetBase::Init(const StringView& dataTypeName, const StringAnsiView& dataJson)
 {
+    PROFILE_MEM(ContentAssets);
     unload(true);
     DataTypeName = dataTypeName;
     DataEngineBuild = FLAXENGINE_VERSION_BUILD;
@@ -239,6 +243,7 @@ Asset::LoadResult JsonAssetBase::loadAsset()
 {
     if (IsVirtual() || _isVirtualDocument)
         return LoadResult::Ok;
+    PROFILE_MEM(ContentAssets);
 
     // Load data (raw json file in editor, cooked asset in build game)
 #if USE_EDITOR
@@ -305,6 +310,7 @@ Asset::LoadResult JsonAssetBase::loadAsset()
 
 void JsonAssetBase::unload(bool isReloading)
 {
+    PROFILE_MEM(ContentAssets);
     ISerializable::SerializeDocument tmp;
     Document.Swap(tmp);
     Data = nullptr;
@@ -453,6 +459,7 @@ bool JsonAsset::CreateInstance()
     ScopeLock lock(Locker);
     if (Instance)
         return false;
+    PROFILE_MEM(ContentAssets);
 
     // Try to scripting type for this data
     const StringAsANSI<> dataTypeNameAnsi(DataTypeName.Get(), DataTypeName.Length());

Source/Engine/Content/JsonAssetReference.h

@@ -19,6 +19,15 @@ API_STRUCT(NoDefault, Template, MarshalAs=JsonAsset*) struct JsonAssetReference
         OnSet(asset);
     }
 
+    explicit JsonAssetReference(decltype(__nullptr))
+    {
+    }
+
+    explicit JsonAssetReference(IAssetReference* owner)
+        : AssetReference<JsonAsset>(owner)
+    {
+    }
+
     /// <summary>
     /// Gets the deserialized native object instance of the given type. Returns null if asset is not loaded or loaded object has different type.
     /// </summary>

Source/Engine/Content/Loading/Tasks/LoadAssetTask.h

@@ -8,6 +8,7 @@
 #include "Engine/Content/WeakAssetReference.h"
 #include "Engine/Core/Log.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 
 /// <summary>
 /// Asset loading task object.
@@ -44,6 +45,7 @@ protected:
     Result run() override
     {
         PROFILE_CPU();
+        PROFILE_MEM(ContentAssets);
 
         // Keep valid ref to the asset
         AssetReference<::Asset> ref = Asset.Get();

Source/Engine/Content/SoftAssetReference.h

@@ -7,7 +7,7 @@
 /// <summary>
 /// The asset soft reference. Asset gets referenced (loaded) on actual use (ID reference is resolving it).
 /// </summary>
-class FLAXENGINE_API SoftAssetReferenceBase
+class FLAXENGINE_API SoftAssetReferenceBase : public IAssetReference
 {
 protected:
     Asset* _asset = nullptr;
@@ -46,11 +46,16 @@ public:
     /// </summary>
     String ToString() const;
 
+public:
+    // [IAssetReference]
+    void OnAssetChanged(Asset* asset, void* caller) override;
+    void OnAssetLoaded(Asset* asset, void* caller) override;
+    void OnAssetUnloaded(Asset* asset, void* caller) override;
+
 protected:
     void OnSet(Asset* asset);
     void OnSet(const Guid& id);
     void OnResolve(const ScriptingTypeHandle& type);
-    void OnUnloaded(Asset* asset);
 };
 
 /// <summary>
@@ -71,6 +76,13 @@ public:
     {
     }
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SoftAssetReference"/> class.
+    /// </summary>
+    explicit SoftAssetReference(decltype(__nullptr))
+    {
+    }
+
     /// <summary>
     /// Initializes a new instance of the <see cref="SoftAssetReference"/> class.
     /// </summary>

Source/Engine/Content/Storage/FlaxChunk.h

@@ -182,10 +182,5 @@ public:
     /// Clones this chunk data (doesn't copy location in file).
     /// </summary>
     /// <returns>The cloned chunk.</returns>
-    FlaxChunk* Clone() const
-    {
-        auto chunk = New<FlaxChunk>();
-        chunk->Data.Copy(Data);
-        return chunk;
-    }
+    FlaxChunk* Clone() const;
 };

Source/Engine/Content/Storage/FlaxStorage.cpp

@@ -8,6 +8,7 @@
 #include "Engine/Core/Types/TimeSpan.h"
 #include "Engine/Platform/File.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Serialization/FileWriteStream.h"
 #include "Engine/Content/Asset.h"
 #include "Engine/Content/Content.h"
@@ -63,6 +64,14 @@ void FlaxChunk::RegisterUsage()
     LastAccessTime = Platform::GetTimeSeconds();
 }
 
+FlaxChunk* FlaxChunk::Clone() const
+{
+    PROFILE_MEM(ContentFiles);
+    auto chunk = New<FlaxChunk>();
+    chunk->Data.Copy(Data);
+    return chunk;
+}
+
 const int32 FlaxStorage::MagicCode = 1180124739;
 
 FlaxStorage::LockData FlaxStorage::LockData::Invalid(nullptr);
@@ -281,19 +290,12 @@ uint32 FlaxStorage::GetMemoryUsage() const
 
 bool FlaxStorage::Load()
 {
-    // Check if was already loaded
     if (IsLoaded())
-    {
         return false;
-    }
-
-    // Prevent loading by more than one thread
+    PROFILE_MEM(ContentFiles);
     ScopeLock lock(_loadLocker);
     if (IsLoaded())
-    {
-        // Other thread loaded it
         return false;
-    }
     ASSERT(GetEntriesCount() == 0);
 
     // Open file
@@ -693,6 +695,7 @@ bool FlaxStorage::LoadAssetHeader(const Guid& id, AssetInitData& data)
 
 bool FlaxStorage::LoadAssetChunk(FlaxChunk* chunk)
 {
+    PROFILE_MEM(ContentFiles);
     ASSERT(IsLoaded());
     ASSERT(chunk != nullptr && _chunks.Contains(chunk));
 
@@ -866,6 +869,7 @@ FlaxChunk* FlaxStorage::AllocateChunk()
 {
     if (AllowDataModifications())
     {
+        PROFILE_MEM(ContentFiles);
         auto chunk = New<FlaxChunk>();
         _chunks.Add(chunk);
         return chunk;
@@ -1125,6 +1129,7 @@ bool FlaxStorage::Save(const AssetInitData& data, bool silentMode)
 
 bool FlaxStorage::LoadAssetHeader(const Entry& e, AssetInitData& data)
 {
+    PROFILE_MEM(ContentFiles);
     ASSERT(IsLoaded());
 
     auto lock = Lock();
@@ -1396,6 +1401,8 @@ FileReadStream* FlaxStorage::OpenFile()
     auto& stream = _file.Get();
     if (stream == nullptr)
     {
+        PROFILE_MEM(ContentFiles);
+
         // Open file
         auto file = File::Open(_path, FileMode::OpenExisting, FileAccess::Read, FileShare::Read);
         if (file == nullptr)
@@ -1418,6 +1425,7 @@ bool FlaxStorage::CloseFileHandles()
         return false;
     }
     PROFILE_CPU();
+    PROFILE_MEM(ContentFiles);
 
     // Note: this is usually called by the content manager when this file is not used or on exit
     // In those situations all the async tasks using this storage should be cancelled externally

Source/Engine/Content/WeakAssetReference.h

@@ -7,7 +7,7 @@
 /// <summary>
 /// Asset reference utility that doesn't add reference to that asset. Handles asset unload event.
 /// </summary>
-API_CLASS(InBuild) class WeakAssetReferenceBase
+API_CLASS(InBuild) class WeakAssetReferenceBase : public IAssetReference
 {
 public:
     typedef Delegate<> EventType;
@@ -56,9 +56,14 @@ public:
     /// </summary>
     String ToString() const;
 
+public:
+    // [IAssetReference]
+    void OnAssetChanged(Asset* asset, void* caller) override;
+    void OnAssetLoaded(Asset* asset, void* caller) override;
+    void OnAssetUnloaded(Asset* asset, void* caller) override;
+
 protected:
     void OnSet(Asset* asset);
-    void OnUnloaded(Asset* asset);
 };
 
 /// <summary>
@@ -72,7 +77,13 @@ public:
     /// Initializes a new instance of the <see cref="WeakAssetReference"/> class.
     /// </summary>
     WeakAssetReference()
-        : WeakAssetReferenceBase()
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="WeakAssetReference"/> class.
+    /// </summary>
+    explicit WeakAssetReference(decltype(__nullptr))
     {
     }
 
@@ -81,7 +92,6 @@ public:
     /// </summary>
     /// <param name="asset">The asset to set.</param>
     WeakAssetReference(T* asset)
-        : WeakAssetReferenceBase()
     {
         OnSet(asset);
     }

Source/Engine/ContentImporters/AssetsImportingManager.cpp

@@ -13,6 +13,7 @@
 #include "Engine/Engine/EngineService.h"
 #include "Engine/Platform/FileSystem.h"
 #include "Engine/Platform/Platform.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Engine/Globals.h"
 #include "ImportTexture.h"
 #include "ImportModel.h"
@@ -151,6 +152,7 @@ bool CreateAssetContext::AllocateChunk(int32 index)
     }
 
     // Create new chunk
+    PROFILE_MEM(ContentFiles);
     Data.Header.Chunks[index] = New<FlaxChunk>();
     return false;
 }

Source/Engine/Core/Cache.cpp

@@ -3,7 +3,7 @@
 #include "Cache.h"
 #include "FlaxEngine.Gen.h"
 
-CollectionPoolCache<ISerializeModifier, Cache::ISerializeModifierClearCallback> Cache::ISerializeModifier;
+Cache::ISerializeModifierCache Cache::ISerializeModifier;
 
 void Cache::ISerializeModifierClearCallback(::ISerializeModifier* obj)
 {

Source/Engine/Core/Cache.h

@@ -15,11 +15,12 @@ public:
     static void ISerializeModifierClearCallback(ISerializeModifier* obj);
 
 public:
+    typedef CollectionPoolCache<ISerializeModifier, ISerializeModifierClearCallback> ISerializeModifierCache;
 
     /// <summary>
     /// Gets the ISerializeModifier lookup cache. Safe allocation, per thread, uses caching.
     /// </summary>
-    static CollectionPoolCache<ISerializeModifier, ISerializeModifierClearCallback> ISerializeModifier;
+    static ISerializeModifierCache ISerializeModifier;
 
 public:
 

Source/Engine/Core/Collections/Array.h

@@ -20,6 +20,7 @@ API_CLASS(InBuild) class Array
 public:
     using ItemType = T;
     using AllocationData = typename AllocationType::template Data<T>;
+    using AllocationTag = typename AllocationType::Tag;
 
 private:
     int32 _count;
@@ -36,6 +37,17 @@ public:
     {
     }
 
+    /// <summary>
+    /// Initializes an empty <see cref="Array"/> without reserving any space.
+    /// </summary>
+    /// <param name="tag">The custom allocation tag.</param>
+    Array(AllocationTag tag)
+        : _count(0)
+        , _capacity(0)
+        , _allocation(tag)
+    {
+    }
+
     /// <summary>
     /// Initializes <see cref="Array"/> by reserving space.
     /// </summary>

Source/Engine/Core/Config.h

@@ -30,13 +30,17 @@
 #endif
 
 // Enable logging service (saving log to file, can be disabled using -nolog command line)
+#ifndef LOG_ENABLE
 #define LOG_ENABLE 1
+#endif
 
 // Enable crash reporting service (stack trace and crash dump collecting)
 #define CRASH_LOG_ENABLE (!BUILD_RELEASE)
 
 // Enable/disable assertion
+#ifndef ENABLE_ASSERTION
 #define ENABLE_ASSERTION (!BUILD_RELEASE)
+#endif
 
 // Enable/disable assertion for Engine low layers
 #define ENABLE_ASSERTION_LOW_LAYERS ENABLE_ASSERTION && (BUILD_DEBUG || FLAX_TESTS)