Work in progress new asset system.

src/SlatedGameToolkit.Framework/AssetSystem/AssetData/TextureData.cs

@@ -0,0 +1,26 @@
+using SlatedGameToolkit.Framework.AssetSystem;
+using SlatedGameToolkit.Framework.Graphics.OpenGL;
+using SlatedGameToolkit.Framework.Graphics.Textures;
+using SlatedGameToolkit.Framework.Graphics.Window;
+
+namespace SlatedGameToolkit.Framework.AssetSystem.AssetData
+{
+    public class TextureData : IAssetData
+    {
+        public readonly byte[] data;
+        public readonly int width;
+        public readonly int height;
+
+        public TextureData(int width, int height, byte[] data) {
+            this.data = data;
+            this.width = width;
+            this.height = height;
+        }
+
+        public IAssetUseable InitializeUseable(GLContext glContext = null)
+        {
+            if (glContext == null) glContext = WindowContextsManager.CurrentGL;
+            return new Texture(this, context: glContext);
+        }
+    }
+}

src/SlatedGameToolkit.Framework/AssetSystem/AssetManager.cs

@@ -14,23 +14,29 @@ namespace SlatedGameToolkit.Framework.AssetSystem {
     /// <param name="path">A path to modify.</param>
     /// <returns>The modified path.</returns>
     public delegate string ModifyPath(string path);
+
     /// <summary>
     /// A delegate that performs the loading of the specific asset.
     /// </summary>
-    /// <param name="path">The path of the asset.</param>
-    /// <param name="glContext">The context to be used.</param>
+    /// <param name="name">The path of the asset.</param>
     /// <typeparam name="T">The type of the resulting asset.</typeparam>
     /// <returns>A loaded, useable asset.</returns>
-    public delegate T LoadAsset<T>(string path, GLContext glContext) where T : IAssetUseable;
+    public delegate IAssetData LoadAsset(string path);
+
+    //TODO Implement change to two step asset pipeline.
+
     public class AssetManager {
         public IAssetUseable this[string key] {
             get {
+                if (!this.assets.ContainsKey(key)) { // if the data is still uninitialized, then do so.
+                    InitializeData(key);
+                }
                 return this.assets[key];
             }
         }
         private readonly object assetThreadLock = new object();
         private Thread thread;
-        private ConcurrentQueue<(string, GLContext)> loadables;
+        private ConcurrentQueue<string> loadables;
         private volatile bool load;
         public bool Complete {
             get {
@@ -57,12 +63,19 @@ namespace SlatedGameToolkit.Framework.AssetSystem {
         /// All file extensions will be requested in lower cases, and therefore, the extension key in this dictionary should also be all lowercase.
         /// </summary>
         /// <value>The dictionary that associates the loaders to their file extensions.</value>
-        public ConcurrentDictionary<string, LoadAsset<IAssetUseable>> Loaders { get ; private set; }
-        public AssetManager() {
-            this.loadables = new ConcurrentQueue<(string, GLContext)>();
+        public ConcurrentDictionary<string, LoadAsset> Loaders { get ; private set; }
+        private ConcurrentDictionary<string, IAssetData> uninitializedDataDictionary;
+        private ConcurrentBag<string> uninitializedDataBag;
+
+        private GLContext glContext;
+        public AssetManager(GLContext glContext = null) {
+            this.glContext = glContext ?? WindowContextsManager.CurrentGL;
+            this.loadables = new ConcurrentQueue<string>();
             this.assets = new ConcurrentDictionary<string, IAssetUseable>();
             this.PathModifiers = new ConcurrentDictionary<string, ModifyPath>();
-            this.Loaders = new ConcurrentDictionary<string, LoadAsset<IAssetUseable>>();
+            this.Loaders = new ConcurrentDictionary<string, LoadAsset>();
+            this.uninitializedDataDictionary = new ConcurrentDictionary<string, IAssetData>();
+            this.uninitializedDataBag = new ConcurrentBag<string>();
 
             thread = new Thread(Run);
             this.load = true;
@@ -77,20 +90,19 @@ namespace SlatedGameToolkit.Framework.AssetSystem {
         /// The file name of the loadable is the one the loadable is saved under.
         /// </summary>
         /// <param name="name">path of file.</param>
-        public void QueueLoad(string name, GLContext glContext = null) {
-            if (glContext == null) glContext = WindowContextsManager.CurrentGL;
-            loadables.Enqueue((name, glContext));
+        public void QueueLoad(string name) {
+            loadables.Enqueue(name);
         }
 
         private void Run() {
             while (load) {
                 lock (assetThreadLock)
                 {
-                ValueTuple<string, GLContext> loadable;
+                    string loadable;
                     while (loadables.TryDequeue(out loadable)) {
-                        Load(loadable.Item1, loadable.Item2);
+                        Load(loadable);
                     }
-                    if (load) Monitor.Wait(assetThreadLock);                
+                    if (load) Monitor.Wait(assetThreadLock);
                 }
             }
         }
@@ -99,8 +111,7 @@ namespace SlatedGameToolkit.Framework.AssetSystem {
         /// Loads the loadable and stores it under the filename given to the loadable.
         /// </summary>
         /// <param name="name">The loadable to load.</param>
-        /// <param name="glContext">The OpenGL context to associate with the loaded asset if the loaded asset requires it. May be null, in which the currently active context will be associated with it.</param>
-        public void Load(string name, GLContext glContext = null) {
+        public void Load(string name) {
             if (glContext == null) glContext = WindowContextsManager.CurrentGL;
             string original = name;
             string ext = Path.GetExtension(name).ToLower().Substring(1);
@@ -110,7 +121,24 @@ namespace SlatedGameToolkit.Framework.AssetSystem {
                 name = DefaultPathModifier(name);
             }
             if (!Loaders.ContainsKey(ext)) throw new FrameworkUsageException(string.Format("Failed to find associated loader for file \"{0}\" with extension \"{1}\".", name, ext));
-            assets[original] = Loaders[ext](name, glContext);
+            uninitializedDataDictionary[original] = Loaders[ext](name);
+            uninitializedDataBag.Add(name);
+            GameEngine.ToRunQueue.Enqueue(InitializeDataRandom);
+        }
+
+        private void InitializeDataRandom() {
+            string name;
+            if (uninitializedDataBag.TryTake(out name)) {
+                if (this.uninitializedDataDictionary.ContainsKey(name)) {
+                    this.assets[name] = this.uninitializedDataDictionary[name].InitializeUseable(glContext);
+                }
+            } else {
+                throw new InternalFrameworkException("Difference in queued uninitialized data loading quantity and actual quantity.");
+            }
+        }
+
+        private void InitializeData(string name) {
+            this.assets[name] = this.uninitializedDataDictionary[name].InitializeUseable(glContext);
         }
 
         /// <summary>
@@ -122,6 +150,13 @@ namespace SlatedGameToolkit.Framework.AssetSystem {
             }
         }
 
+        public void WaitAndLoadAllQueued() {
+            LoadQueued();
+            Monitor.Enter(assetThreadLock);
+            Monitor.Exit(assetThreadLock);
+            return;
+        }
+
         /// <summary>
         /// Unloads the asset under the given name.
         /// This disposes the asset as well as removes it from the manager.

src/SlatedGameToolkit.Framework/AssetSystem/IAssetData.cs

@@ -0,0 +1,14 @@
+using SlatedGameToolkit.Framework.Graphics.OpenGL;
+
+namespace SlatedGameToolkit.Framework.AssetSystem
+{
+    public interface IAssetData
+    {
+        /// <summary>
+        /// Initializes the asset data and returns the useable variant of said data.
+        /// </summary>
+        /// <param name="GLContext">The Open GL Context to use.</param>
+        /// <returns>The associated useable asset.</returns>
+        IAssetUseable InitializeUseable(GLContext GLContext);
+    }
+}

src/SlatedGameToolkit.Framework/AssetSystem/Loaders/TextureLoader.cs

@@ -1,4 +1,5 @@
 using System.IO;
+using SlatedGameToolkit.Framework.AssetSystem.AssetData;
 using SlatedGameToolkit.Framework.Graphics.OpenGL;
 using SlatedGameToolkit.Framework.Graphics.Textures;
 using StbImageSharp;
@@ -12,15 +13,14 @@ namespace SlatedGameToolkit.Framework.Loaders
         /// Any format supported by StbImage is therefore supported.
         /// </summary>
         /// <param name="path">The path of the texture to load.</param>
-        /// <param name="glContext">The OpenGL context to associate the texture with.</param>
-        /// <returns>A texture.</returns>
-        public static Texture Load2DTexture(string path, GLContext glContext = null)
+        /// <returns>The data for the texture.</returns>
+        public static TextureData Load2DTexture(string path)
         {
             using (Stream stream = File.OpenRead(path))
             {
                 ImageResult image = ImageResult.FromStream(stream, ColorComponents.RedGreenBlueAlpha);
                 TextureData textureData = new TextureData(image.Width, image.Height, image.Data);
-                return new Texture(textureData, false, glContext);
+                return textureData;
             }
         }
     }

src/SlatedGameToolkit.Framework/GameEngine.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Concurrent;
 using System.Runtime.InteropServices;
 using System.Threading;
 using SDL2;
@@ -23,6 +24,8 @@ namespace SlatedGameToolkit.Framework {
         private static volatile bool deltaChanged;
         private static TimeSpan updateDeltaTime = TimeSpan.FromSeconds(1d/40d), frameDeltaTime = TimeSpan.FromSeconds(1d/60d);
 
+        public static ConcurrentQueue<ThreadStart> ToRunQueue = new ConcurrentQueue<ThreadStart>();
+
         /// <summary>
         /// The amount of updates per second.
         /// 
@@ -185,7 +188,13 @@ namespace SlatedGameToolkit.Framework {
                     updateTimePassedFromLastRender = TimeSpan.Zero;
                     timePassedFromLastRender = TimeSpan.Zero;
                 } else {
-                    Thread.Yield();
+                    ThreadStart runnable;
+                    if (ToRunQueue.TryDequeue(out runnable)) {
+                        runnable();
+                    } else 
+                    {
+                        Thread.Yield();
+                    }
                 }
             }
             stopped = true;

src/SlatedGameToolkit.Framework/Graphics/Textures/ITexture.cs

@@ -1,8 +1,9 @@
 using System;
+using SlatedGameToolkit.Framework.AssetSystem;
 
 namespace SlatedGameToolkit.Framework.Graphics.Textures
 {
-    public interface ITexture : IDisposable
+    public interface ITexture : IAssetUseable, IDisposable
     {
         /// <summary>
         /// Whether or not this model uses a texture that is single chanelled.

src/SlatedGameToolkit.Framework/Graphics/Textures/Texture.cs

@@ -3,6 +3,7 @@ using SlatedGameToolkit.Framework.Graphics.OpenGL;
 using SlatedGameToolkit.Framework.Graphics.Render;
 using SlatedGameToolkit.Framework.Graphics.Window;
 using SlatedGameToolkit.Framework.AssetSystem;
+using SlatedGameToolkit.Framework.AssetSystem.AssetData;
 
 namespace SlatedGameToolkit.Framework.Graphics.Textures
 {

src/SlatedGameToolkit.Framework/Graphics/Textures/TextureData.cs

@@ -1,17 +0,0 @@
-using SlatedGameToolkit.Framework.AssetSystem;
-
-namespace SlatedGameToolkit.Framework.Graphics.Textures
-{
-    public class TextureData
-    {
-        public readonly byte[] data;
-        public readonly int width;
-        public readonly int height;
-
-        public TextureData(int width, int height, byte[] data) {
-            this.data = data;
-            this.width = width;
-            this.height = height;
-        }
-    }
-}

src/SlatedGameToolkit.Tools/CommandSystem/IInvocable.cs

@@ -16,13 +16,14 @@ namespace SlatedGameToolkit.Tools.CommandSystem
         /// The help should be a description of how to properly use this invokable.
         /// If an argument is specified, the help should cater to that specific argument.
         /// Information in the description does not need to be repeated.
+        /// Arguments will always be lowercase or null.
         /// </summary>
         /// <param name="arg">An argument this invokable should describe. May be null, to which should return a string that describes this invokable in general.</param>
         /// <returns></returns>
         string getUsage(string arg);
         
         /// <summary>
-        /// Executes this invokable.
+        /// Executes this invokable. Arguments will always be lowercase.
         /// </summary>
         /// <param name="interactable">The interactable object.</param>
         /// <param name="args">The arguments that followed the invokable.</param>

src/SlatedGameToolkit.Tools/Commands/ExportCommand.cs

@@ -0,0 +1,33 @@
+using SlatedGameToolkit.Tools.CommandSystem;
+using SlatedGameToolkit.Tools.CommandSystem.Interaction;
+
+namespace SlatedGameToolkit.Tools.Commands
+{
+    public class ExportCommand : IInvocable
+    {
+        public void Dispose()
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public bool Execute(IInteractable interactable, string[] args)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public string getDescription()
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public string[] GetInvokers()
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public string getUsage(string arg)
+        {
+            return null;
+        }
+    }
+}

src/SlatedGameToolkit.Tools/Commands/GraphicalPlaygroundCommand.cs

@@ -90,7 +90,25 @@ namespace SlatedGameToolkit.Tools.Commands
 
         public string getUsage(string arg)
         {
-            return "\"playground [start | stop | status | log | debug | framerate <framerate> | updates <update rate>]\"";
+            if (arg == null) {
+                return "\"playground [start | stop | status | log | debug | framerate <framerate> | updates <update rate>]\"";
+            } else if (arg.Equals("start")) {
+                return "Starts the playground.";
+            } else if (arg.Equals("stop")) {
+                return "Stops the playground.";
+            } else if (arg.Equals("status")) {
+                return "Retrieves the FPS, update rate, whether or not the playground is running, and if debugging is turned on.";
+            } else if (arg.Equals("log")) {
+                return "Toggles whether or not to attach logging to the console.";
+            } else if (arg.Equals("debug")) {
+                return "Toggles debugging. If logging is disabled, logging will be enabled.";
+            } else if (arg.Equals("framerate")) {
+                return "sets the FPS. Needs to be followed by a numerical value representing the new target FPS.";
+            } else if (arg.Equals("updates")) {
+                return "Sets the new update rate. Needs to be followed by a numerical value representing the target update rate.";
+            } else {
+                return null;
+            }
         }
 
         public void Dispose()

src/SlatedGameToolkit.Tools/Commands/HelpCommand.cs

@@ -23,7 +23,14 @@ namespace SlatedGameToolkit.Tools.Commands
                 builder.AppendJoin(", ", invocable.GetInvokers());
                 interactable.Tell("Possible aliases: " + builder.ToString());
                 interactable.Tell("Description: " + invocable.getDescription());
-                interactable.Tell("Usage: " + invocable.getUsage(args.Length > 0 ? args[0] : null));
+                if (args.Length > 1) {
+                    string desc = invocable.getUsage(args[1]);
+                    if (desc == null) {
+                        interactable.Tell(string.Format("Unable to find argument \"{0}\" for command \"{1}\". Please type \"help\" for more info.", args[1], args[0]));
+                    } else {
+                        interactable.Tell(args[1] + ": " + desc);
+                    }
+                }
             } else {
                 interactable.Tell("--- Help ---");
                 foreach (IInvocable invocable in commandMap)

src/SlatedGameToolkit.Tools/Utilities/Playground/MainState.cs

@@ -10,6 +10,7 @@ using SlatedGameToolkit.Framework.Input.Devices;
 using SlatedGameToolkit.Framework.StateSystem;
 using SlatedGameToolkit.Framework.StateSystem.States;
 using SlatedGameToolkit.Framework.Graphics;
+using SlatedGameToolkit.Framework.AssetSystem;
 
 namespace SlatedGameToolkit.Tools.Utilities.Playground
 {
@@ -19,7 +20,7 @@ namespace SlatedGameToolkit.Tools.Utilities.Playground
         private Camera2D camera;
         private MeshBatchRenderer renderer;
         private BitmapFont font;
-        private Texture logoTexture, fillerTexture;
+        private AssetManager assets;
         private RectangleMesh logo, textureTester, untextured;
         private string lastPressed;
 
@@ -37,8 +38,7 @@ namespace SlatedGameToolkit.Tools.Utilities.Playground
 
         public void Deinitialize()
         {
-            logoTexture.Dispose();
-            fillerTexture.Dispose();
+            assets.UnloadAll();
             font.Dispose();
             renderer.Dispose();
             window.Dispose();
@@ -56,17 +56,21 @@ namespace SlatedGameToolkit.Tools.Utilities.Playground
             float ratio = drawableDimensions.Y / drawableDimensions.X;
             camera = new Camera2D(2f, ratio * 2f);
             renderer = new MeshBatchRenderer(camera, BatchVertexSize: 2048);
+            assets = new AssetManager();
+            assets.Loaders["png"] = TextureLoader.Load2DTexture;
 
-            logoTexture = TextureLoader.Load2DTexture("Resources/Playground/yhdnbgnc.png");
-            logo = new RectangleMesh(logoTexture, Color.White);
+            assets.QueueLoad("Resources/Playground/yhdnbgnc.png");
+            assets.QueueLoad("Resources/Playground/filler.png");
+
+            assets.WaitAndLoadAllQueued();
+
+            logo = new RectangleMesh((ITexture)assets["Resources/Playground/yhdnbgnc.png"], Color.White);
             logo.Width = 0.5f;
             logo.Height = 0.5f;
             logo.X = -0.25f;
             logo.Y = -0.25f;
 
-
-            fillerTexture = TextureLoader.Load2DTexture("Resources/Playground/filler.png");
-            textureTester = new RectangleMesh(fillerTexture, Color.White);
+            textureTester = new RectangleMesh((ITexture)assets["Resources/Playground/filler.png"], Color.White);
             textureTester.Width = 0.15f;
             textureTester.Height = 0.15f;
             textureTester.X = 0.25f;