Start of asset handles

GlitchyEditor/src/EditorContentManager.bf

@@ -81,7 +81,9 @@ class EditorContentManager : IContentManager
 	
 	//private append List<String> _identifiers = .() ~ _.ClearAndDeleteItems();
 
-	private append Dictionary<StringView, Asset> _loadedAssets = .(); // Check if all resources are unloaded
+	private append Dictionary<StringView, AssetHandle> _handles = .(); // TODO: Check if all resources are unloaded
+
+	private append Dictionary<AssetHandle, Asset> _handleToAsset = .();
 
 	private append AssetHierarchy _assetHierarchy = .(this);
 
@@ -99,6 +101,8 @@ class EditorContentManager : IContentManager
 
 	private void OnFileContentChanged(AssetNode assetNode)
 	{
+		// TODO: update for AssetHandles
+
 		// TODO: Subassets break reloading because we can't find them when we only receive the file that changed...
 
 		// Asset isn't loaded so we don't need to reload it.
@@ -237,14 +241,36 @@ class EditorContentManager : IContentManager
 
 	public bool IsLoaded(StringView identifier)
 	{
-		return _loadedAssets.ContainsKey(identifier);
+		return _handles.ContainsKey(identifier);
 	}
 	
-	public Asset LoadAsset(StringView identifier)
+	public Asset GetAsset(Type assetType, AssetHandle handle)
 	{
-		if (_loadedAssets.TryGetValue(identifier, let asset))
+		Asset asset = null;
+
+		_handleToAsset.TryGetValue(handle, out asset);
+
+		if (assetType == null)
 		{
-			return asset..AddRef();
+			return asset;
+		}
+		else if (asset.GetType() == assetType)
+		{
+			return asset;
+		}
+		else
+		{
+			// TODO: get default asset
+
+			return null;
+		}
+	}
+
+	public AssetHandle LoadAsset(StringView identifier)
+	{
+		if (_handles.TryGetValue(identifier, let asset))
+		{
+			return asset;
 		}
 
 		// Find subasset name
@@ -265,7 +291,7 @@ class EditorContentManager : IContentManager
 		if (resultNode case .Err)
 		{
 			Log.EngineLogger.Error($"Could not find asset \"{filePath}\".");
-			return null;
+			return .Invalid;
 		}
 
 		AssetFile file = resultNode->Value.AssetFile;
@@ -294,20 +320,19 @@ class EditorContentManager : IContentManager
 		delete stream;
 
 		if (loadedAsset == null)
-			return null;
+			return .Invalid;
 
 		//String identifierString = new .(identifier);
 		//_identifiers.Add(identifierString);
 
 		//_loadedAssets[identifierString] = loadedAsset;
 		
-
 		loadedAsset.Identifier = identifier;
-		ManageAsset(loadedAsset);
+		AssetHandle handle = ManageAsset(loadedAsset);
 
 		file.[Friend]_loadedAsset = loadedAsset;
 
-		return loadedAsset;
+		return handle;
 	}
 
 	/// Saves the asset.
@@ -413,37 +438,57 @@ class EditorContentManager : IContentManager
 		return fs;*/
 	}
 
-	public void ManageAsset(Asset asset)
+	public AssetHandle ManageAsset(Asset asset)
 	{
-		_loadedAssets.Add(asset.Identifier, asset);
+		AssetHandle handle = .(asset.Identifier);
+
+		// TODO: to ensure that no two assets with the same handle exist.
+
+		_handles.Add(asset.Identifier, handle);
+		_handleToAsset.Add(handle, asset);
+
 		asset.[Friend]_contentManager = this;
+		asset.[Friend]_handle = handle;
+
+		return handle;
 	}
 
-	public void UnmanageAsset(Asset asset)
+	public void UnmanageAsset(AssetHandle handle)
 	{
-		_loadedAssets.Remove(asset.Identifier);
+		Log.EngineLogger.AssertDebug(_handles.ContainsValue(handle), "Handle isn't managed by this content manager.");
+		Log.EngineLogger.AssertDebug(_handleToAsset.ContainsKey(handle), "Handle doesn't correspond to an asset.");
+
+		Asset asset = _handleToAsset[handle];
+		_handles.Remove(asset.Identifier);
+		_handleToAsset.Remove(handle);
 		asset.[Friend]_contentManager = null;
+
+		asset.ReleaseRef();
 	}
 
 	/// This will unregister all assets from this content manager.
 	/// Note: This will not release any assets.
 	private void UnmanageAllAssets()
 	{
-		for (let (_, asset) in _loadedAssets)
+		for (let (_, assetHandle) in _handles)
 		{
-			UnmanageAsset(asset);
+			UnmanageAsset(assetHandle);
 		}
 	}
 
 	public void UpdateAssetIdentifier(Asset asset, StringView oldIdentifier, StringView newIdentifier)
 	{
+		// TODO: this is much harder with asste handles that are basically hashed identifiers!
+
+		Runtime.NotImplemented();
+
 		if (oldIdentifier == newIdentifier)
 			return;
 
-		Log.EngineLogger.Assert(_loadedAssets.ContainsKey(newIdentifier), "An asset with the same identifier is already managed by this content manager.");
+		Log.EngineLogger.Assert(_handles.ContainsKey(newIdentifier), "An asset with the same identifier is already managed by this content manager.");
 
 		// Since all we do in order to track assets is add them to a dictionary we can simply unmanage and manage it again.
-		UnmanageAsset(asset);
-		ManageAsset(asset);
+		//UnmanageAsset(asset);
+		//ManageAsset(asset);
 	}
 }

GlitchyEngine/src/Application.bf

@@ -34,6 +34,8 @@ namespace GlitchyEngine
 
 		public bool IsMinimized => _isMinimized;
 
+		public GameTime GameTime => _gameTime;
+
 		[Inline]
 		public static Application Get() => s_Instance;
 

GlitchyEngine/src/Content/Asset.bf

@@ -10,6 +10,8 @@ namespace GlitchyEngine.Content;
 [BonTarget]
 class Asset : RefCounter
 {
+	internal AssetHandle _handle;
+
 	private append String _identifier;
 
 	internal IContentManager _contentManager;
@@ -33,6 +35,8 @@ class Asset : RefCounter
 	/// Gets the content manager that manages this asset; or null if this asset isn't managed.
 	public IContentManager ContentManager => _contentManager;
 
+	public AssetHandle Handle => _handle;
+
 	static this
 	{
 		gBonEnv.typeHandlers.Add(typeof(Asset),
@@ -43,7 +47,7 @@ class Asset : RefCounter
 	{
 		// TODO: crash when _contentManager is deleted first...
 		// TODO: unregister from content manager
-		_contentManager?.UnmanageAsset(this);
+		//_contentManager?.UnmanageAsset(this);
 	}
 
 	static void AssetSerialize(BonWriter writer, ValueView value, BonEnvironment environment, SerializeValueState state)
@@ -56,7 +60,10 @@ class Asset : RefCounter
 
 	static Result<void> AssetDeserialize(BonReader reader, ValueView value, BonEnvironment environment, DeserializeValueState state)
 	{
-		Log.EngineLogger.Assert(value.type == typeof(Asset));
+		// TODO!!!
+
+		return .Err;
+		/*Log.EngineLogger.Assert(value.type == typeof(Asset));
 
 		String identifier = scope .();
 
@@ -75,7 +82,7 @@ class Asset : RefCounter
 		else
 		{
 			Deserialize.Error!("Invalid resource path", reader, value.type);
-		}
+		}*/
 	}
 
 	//gBonEnv.typeHandlers.Add(typeof(Resource<>),

GlitchyEngine/src/Content/AssetHandle.bf

@@ -0,0 +1,211 @@
+using System;
+using xxHash;
+using System.Collections;
+using System.Reflection;
+using System.Diagnostics;
+namespace GlitchyEngine.Content;
+
+struct AssetHandle : uint64
+{
+	/// Defines an asset that is invalid. E.g. because it couldn't be loaded.
+	public const AssetHandle Invalid = (.)0;
+
+	public this(StringView name)
+	{
+		this = (uint64)xxHash.ComputeHash(name);
+	}
+
+	[Inline]
+	public T Get<T>(IContentManager contentManager = null) where T : Asset
+	{
+		return Content.GetAsset<T>(this, contentManager);
+	}
+}
+
+struct AssetHandle<T> where T : Asset
+{
+	private AssetHandle _handle;
+	private IContentManager _contentManager;
+	/*
+	 * We don't increment/decrement the reference counter since we guarantee that we query for the asset every frame.
+	 */
+	private T _asset;
+	private uint8 _currentFrame;
+
+	public this(AssetHandle handle, IContentManager contentManager = null)
+	{
+		_handle = handle;
+		_contentManager = contentManager;
+
+		_asset = handle.Get<T>(contentManager);
+		_contentManager = _asset.ContentManager;
+		_currentFrame = (uint8)Application.Get().GameTime.FrameCount;
+	}
+
+	public T Get(IContentManager contentManager = null) mut
+	{
+		// We only care whether we are in a different frame -> we only compare the lower 8 bits.
+		uint8 actualFrame = (uint8)Application.Get().GameTime.FrameCount;
+
+		if (actualFrame != _currentFrame)
+		{
+			_asset = Content.GetAsset<T>(_handle, contentManager == null ? _contentManager : contentManager);
+		}
+
+		return _asset;
+	}
+
+	[Comptime, OnCompile(.TypeInit)]
+	static void Init()
+	{
+		for (var field in typeof(T).GetFields())
+		{
+			if (field.IsStatic || !field.IsPublic)
+				continue;
+
+			String modifier = field.IsPublic ? "public" : "private";
+
+			String code = scope $"""
+				{modifier} {field.FieldType} {field.Name}
+				{{
+					get mut
+					{{
+						return Get().{field.Name};
+					}}
+					set mut
+					{{
+						Get().{field.Name} = value;
+					}}
+				}}
+
+
+				""";
+
+			Compiler.EmitTypeBody(typeof(Self), code);
+		}
+
+		Dictionary<StringView, (MethodInfo? Getter, MethodInfo? Setter)> properties = scope .();
+
+		for (var method in typeof(T).GetMethods())
+		{
+			if (method.IsStatic || !method.IsPublic || method.IsConstructor || method.IsDestructor)
+				continue;
+
+			// Filter out destructors
+			if (method.Name == "~this")
+				continue;
+
+			if (method.Name.StartsWith("get__"))
+			{
+				StringView name = method.Name;
+				name.RemoveFromStart(5);
+
+				if (!properties.TryGetValue(name, var propertyInfo))
+				{
+					propertyInfo = default;
+				}
+
+				propertyInfo.Getter = method;
+
+				properties[name] = propertyInfo;
+
+				continue;
+			}
+			if (method.Name.StartsWith("set__"))
+			{
+				StringView name = method.Name;
+				name.RemoveFromStart(5);
+
+				if (!properties.TryGetValue(name, var propertyInfo))
+				{
+					propertyInfo = default;
+				}
+
+				propertyInfo.Setter = method;
+
+				properties[name] = propertyInfo;
+
+				continue;
+			}
+
+			String modifier = method.IsPublic ? "public" : "private";
+			
+			String parameters = scope String();
+			String arguments = scope String();
+
+			for (int param < method.ParamCount)
+			{
+				Type paramType = method.GetParamType(param);
+				StringView paramName = method.GetParamName(param);
+				//String buffer = scope .();
+				//method.GetParamsDecl(buffer);
+
+				if (param != 0)
+				{
+					parameters.Append(", ");
+					arguments.Append(", ");
+				}
+
+				// TODO: Default value
+				parameters.AppendF($"{paramType} {paramName}");
+
+				/*if (!buffer.IsEmpty)
+				{
+					parameters.AppendF($" = {buffer}");
+				}*/
+
+				arguments.AppendF($" {paramName}");
+			}
+
+			String code = scope $"""
+				{modifier} {method.ReturnType} {method.Name}({parameters}) mut
+				{{
+					return Get().{method.Name}({arguments});
+				}}
+
+
+				""";
+
+			Compiler.EmitTypeBody(typeof(Self), code);
+		}
+
+		for (var (propertyName, property) in properties)
+		{
+			Type propertyType = property.Getter?.ReturnType ?? property.Setter?.GetParamType(0);
+
+			String getter = scope .();
+			String setter = scope .();
+
+			if (property.Getter != null)
+			{
+				getter.AppendF($"""
+						get mut
+						{{
+							return Get().{propertyName};
+						}}
+					""");
+			}
+			if (property.Setter != null)
+			{
+				getter.AppendF($"""
+
+						set mut
+						{{
+							Get().{propertyName} = value;
+						}}
+					""");
+			}
+
+			String code = scope $"""
+				public {propertyType} {propertyName}
+				{{
+				{getter}{setter}
+				}}
+
+
+				""";
+
+			Compiler.EmitTypeBody(typeof(Self), code);
+		}
+	}
+}

GlitchyEngine/src/Content/ContentManager.bf

@@ -59,19 +59,30 @@ namespace GlitchyEngine.Content
 		Asset LoadAsset(Stream file, AssetLoaderConfig config, StringView assetIdentifier, StringView? subAsset, IContentManager contentManager);
 	}
 
-	static
+	static class Content
 	{
 		/// Loads the specified asset with the given contentManager or the current applications content manager.
-		public static T LoadAsset<T>(StringView assetIdentifier, IContentManager contentManager = null) where T : Asset
+		public static AssetHandle LoadAsset(StringView assetIdentifier, IContentManager contentManager = null)
 		{
 			var contentManager;
 
 			if (contentManager == null)
 				contentManager = Application.Get().ContentManager;
 
-			Asset asset = contentManager.LoadAsset(assetIdentifier);
+			AssetHandle handle = contentManager.LoadAsset(assetIdentifier);
 
-			Log.EngineLogger.AssertDebug(asset is T);
+			return handle;
+		}
+
+		/// Loads the specified asset with the given contentManager or the current applications content manager.
+		public static T GetAsset<T>(AssetHandle handle, IContentManager contentManager = null) where T : Asset
+		{
+			var contentManager;
+
+			if (contentManager == null)
+				contentManager = Application.Get().ContentManager;
+
+			Asset asset = contentManager.GetAsset(typeof(T), handle);
 
 			return (T)asset;
 		}
@@ -79,14 +90,23 @@ namespace GlitchyEngine.Content
 
 	interface IContentManager
 	{
-		/// Loads the given asset.
-		Asset LoadAsset(StringView assetIdentifier);
+		/// Loads the Asset with the given handle and returns the handle.
+		AssetHandle LoadAsset(StringView assetIdentifier);
+
+		/// Returns the asset for the given handle or null, if it isn't loaded.
+		Asset GetAsset(AssetHandle handle)
+		{
+			return GetAsset(null, handle);
+		}
+
+		/// Returns the asset for the given handle or the default asset of the given type.
+		Asset GetAsset(Type assetType, AssetHandle handle);
 
 		/// The content manager will manage the asset (e.g. provide it when LoadAsset is called with the assets identifier)
-		void ManageAsset(Asset asset);
+		AssetHandle ManageAsset(Asset asset);
 
 		/// The content manager will no longer manage the asset.
-		void UnmanageAsset(Asset asset);
+		void UnmanageAsset(AssetHandle asset);
 
 		// TODO: Maybe calling UnmanageAsset -> ManageAsset is enough....
 		/// Provides a method for the asset to tell its content manager that the identifer changed.
@@ -109,17 +129,22 @@ namespace GlitchyEngine.Content
 			Runtime.NotImplemented();
 		}
 
-		public Asset LoadAsset(StringView assetIdentifier)
+		public AssetHandle LoadAsset(StringView assetIdentifier)
 		{
 			Runtime.NotImplemented();
 		}
 
-		public void ManageAsset(Asset asset)
+		public Asset GetAsset(Type assetType, AssetHandle handle)
 		{
 			Runtime.NotImplemented();
 		}
 
-		public void UnmanageAsset(Asset asset)
+		public AssetHandle ManageAsset(Asset asset)
+		{
+			Runtime.NotImplemented();
+		}
+
+		public void UnmanageAsset(AssetHandle asset)
 		{
 			Runtime.NotImplemented();
 		}

GlitchyEngine/src/Generators/NewStructGenerator.bf

@@ -20,11 +20,10 @@ namespace GlitchyEngine.Generators
 			outFileName.Append(name);
 			outText.AppendF(
 				$"""
-				namespace {Namespace}
+				namespace {Namespace};
+
+				struct {name}
 				{{
-					struct {name}
-					{{
-					}}
 				}}
 				""");
 		}

GlitchyEngine/src/Renderer/Effect.bf

@@ -134,7 +134,20 @@ public class Effect : Asset
 
 	BufferVariableCollection _variables ~ delete _;
 
-	typealias TextureEntry = (TextureViewBinding BoundTexture, ShaderTextureCollection.ResourceEntry* VsSlot, ShaderTextureCollection.ResourceEntry* PsSlot);
+	public struct TextureEntry
+	{
+		public TextureViewBinding BoundTexture;
+		public ShaderTextureCollection.ResourceEntry* VsSlot;
+		public ShaderTextureCollection.ResourceEntry* PsSlot;
+
+		public this(TextureViewBinding boundTexture, ShaderTextureCollection.ResourceEntry* vsSlot, ShaderTextureCollection.ResourceEntry* psSlot)
+		{
+			BoundTexture = boundTexture;
+			VsSlot = vsSlot;
+			PsSlot = psSlot;
+		}
+	}
+
 	Dictionary<String, TextureEntry> _textures ~ delete _;
 
 	public Dictionary<String, TextureEntry> Textures => _textures;
@@ -725,7 +738,7 @@ public class Effect : Asset
 			// Get existing entry or create new
 			if(!_textures.TryGetValue(shaderEntry.Name, out entry))
 			{
-				entry = (shaderEntry.BoundTexture, null, null);
+				entry = .(shaderEntry.BoundTexture, null, null);
 				entry.BoundTexture.AddRef();
 			}
 

GlitchyEngine/src/Renderer/Renderer.bf

@@ -2,6 +2,7 @@ using GlitchyEngine.Math;
 using GlitchyEngine.World;
 using System.Collections;
 using System;
+using GlitchyEngine.Content;
 
 namespace GlitchyEngine.Renderer
 {

GlitchyEngine/src/World/Scene.bf

@@ -24,7 +24,7 @@ namespace GlitchyEngine.World
 		// Temporary target for camera. Needs to change as soon as we support multiple cameras
 		private RenderTargetGroup _cameraTarget ~ _.ReleaseRef();
 
-		private Effect _gammaCorrectEffect ~ _.ReleaseRef();
+		private AssetHandle _gammaCorrectEffect;
 
 		// Maps ids to the entities they represent.
 		private Dictionary<UUID, EcsEntity> _idToEntity = new .() ~ delete _;
@@ -76,7 +76,7 @@ namespace GlitchyEngine.World
 					DepthTargetDescription = .(.D24_UNorm_S8_UInt)
 				});
 
-			_gammaCorrectEffect = Content.LoadAsset<Effect>("Shaders/GammaCorrect.hlsl");//Application.Get().EffectLibrary.Load("content/Shaders/GammaCorrect.hlsl");
+			_gammaCorrectEffect = Content.LoadAsset("Shaders/GammaCorrect.hlsl");//Application.Get().EffectLibrary.Load("content/Shaders/GammaCorrect.hlsl");
 		}
 
 		public ~this()
@@ -269,10 +269,12 @@ namespace GlitchyEngine.World
 				RenderCommand.SetRenderTargetGroup(finalTarget, false);
 				RenderCommand.BindRenderTargets();
 
-				_gammaCorrectEffect.SetTexture("Texture", _compositeTarget, 0);
+				Effect gammaEffect = Content.GetAsset<Effect>(_gammaCorrectEffect);
+
+				gammaEffect.SetTexture("Texture", _compositeTarget, 0);
 				// TODO: iiihhh
-				_gammaCorrectEffect.ApplyChanges();
-				_gammaCorrectEffect.Bind();
+				gammaEffect.ApplyChanges();
+				gammaEffect.Bind();
 	
 				FullscreenQuad.Draw();
 			}
@@ -486,10 +488,12 @@ namespace GlitchyEngine.World
 				RenderCommand.SetRenderTargetGroup(viewportTarget, false);
 				RenderCommand.BindRenderTargets();
 				
-				_gammaCorrectEffect.SetTexture("Texture", _compositeTarget, 0);
+				Effect gammaEffect = Content.GetAsset<Effect>(_gammaCorrectEffect);
+
+				gammaEffect.SetTexture("Texture", _compositeTarget, 0);
 				// TODO: iiihhh
-				_gammaCorrectEffect.ApplyChanges();
-				_gammaCorrectEffect.Bind();
+				gammaEffect.ApplyChanges();
+				gammaEffect.Bind();
 	
 				FullscreenQuad.Draw();
 			}

Sandbox/src/ExampleLayer.bf

@@ -1,4 +1,4 @@
-using GlitchyEngine.Renderer;
+/*using GlitchyEngine.Renderer;
 using GlitchyEngine.Events;
 using GlitchyEngine.ImGui;
 using GlitchyEngine.Math;
@@ -63,8 +63,8 @@ namespace Sandbox
 			
 			Material _checkerMaterial ~ _?.ReleaseRef();
 			Material _logoMaterial ~ _?.ReleaseRef();
-			Texture2D _texture ~ _?.ReleaseRef();
-			Texture2D _ge_logo ~ _?.ReleaseRef();
+			AssetHandle _texture;
+			AssetHandle _ge_logo;
 
 			BlendState _alphaBlendState ~ _?.ReleaseRef();
 			BlendState _opaqueBlendState ~ _?.ReleaseRef();
@@ -91,7 +91,7 @@ namespace Sandbox
 
 				//effectLibrary.LoadNoRefInc("content\\Shaders\\testShader.hlsl");
 				
-				Effect textureEffect = Content.LoadAsset<Effect>("Shaders\\textureShader.hlsl");
+				Effect textureEffect = Content.GetAsset<Effect>(Content.LoadAsset("Shaders\\textureShader.hlsl"));
 
 				_depthTarget = new DepthStencilTarget(_context.SwapChain.Width, _context.SwapChain.Height);
 
@@ -99,7 +99,7 @@ namespace Sandbox
 
 				VertexLayout vertexLayout = new VertexLayout(VertexColorTexture.VertexElements, false);
 
-				textureEffect.ReleaseRef();
+				//textureEffect.ReleaseRef();
 
 				// Create hexagon
 				{
@@ -174,8 +174,11 @@ namespace Sandbox
 				rsDesc.FrontCounterClockwise = false;
 				_rasterizerStateClockWise = new RasterizerState(rsDesc);
 
-				_texture = Content.LoadAsset<Texture2D>("content/Textures/Checkerboard.dds");//new Texture2D("content/Textures/Checkerboard.dds");
-				_ge_logo = Content.LoadAsset<Texture2D>("content/Textures/GE_Logo.dds");//new Texture2D("content/Textures/GE_Logo.dds");
+				_texture = Content.LoadAsset("content/Textures/Checkerboard.dds");//new Texture2D("content/Textures/Checkerboard.dds");
+				_ge_logo = Content.LoadAsset("content/Textures/GE_Logo.dds");//new Texture2D("content/Textures/GE_Logo.dds");
+
+				Texture2D texture = Content.GetAsset<Texture2D>(_texture);
+				Texture2D ge_logo = Content.GetAsset<Texture2D>(_ge_logo);
 
 				let sampler = SamplerStateManager.GetSampler(
 					SamplerStateDescription()
@@ -183,8 +186,8 @@ namespace Sandbox
 						MagFilter = .Point
 					});
 				
-				_texture.SamplerState = sampler;
-				_ge_logo.SamplerState = sampler;
+				texture.SamplerState = sampler;
+				ge_logo.SamplerState = sampler;
 
 				sampler.ReleaseRef();
 
@@ -518,4 +521,4 @@ namespace Sandbox
 			}
 		}
 
-}
+}*/