FontRenderer: Basic Rich Text processing and lazy text building

GlitchyEngine/src/World/Components/TextRendererComponent.bf

@@ -1,11 +1,20 @@
 using System;
+using static GlitchyEngine.Renderer.Text.FontRenderer;
 namespace GlitchyEngine.World.Components;
 
+enum TextRendererFlags
+{
+	IsRichText = 1,
+	NeedsRebuild = 2
+}
+
 struct TextRendererComponent : IDisposableComponent
 {
 	private String _text;
+	
+	private PreparedText _preparedText;
 
-	private bool _isRichText;
+	private TextRendererFlags _flags;
 
 	public StringView Text
 	{
@@ -19,14 +28,27 @@ struct TextRendererComponent : IDisposableComponent
 		}
 	}
 
+	public PreparedText PreparedText
+	{
+		get => _preparedText;
+		set mut => SetReference!(_preparedText, value);
+	}
+
 	public bool IsRichText
 	{
-		get => _isRichText;
-		set mut => _isRichText = value;
+		get => _flags.HasFlag(.IsRichText);
+		set mut => Enum.SetFlagConditionally(ref _flags, .IsRichText, value);
+	}
+
+	public bool NeedsRebuild
+	{
+		get => _flags.HasFlag(.NeedsRebuild);
+		set mut => Enum.SetFlagConditionally(ref _flags, .NeedsRebuild, value);
 	}
 
 	public void Dispose()
 	{
 		delete _text;
+		_preparedText?.ReleaseRef();
 	}
 }

GlitchyEngine/src/World/Scene.bf

@@ -10,6 +10,8 @@ using GlitchyEngine.Math;
 using GlitchyEngine.Scripting.Classes;
 using GlitchyEngine.Serialization;
 using GlitchyEngine.World.Components;
+using GlitchyEngine.Renderer.Text;
+using static GlitchyEngine.Renderer.Text.FontRenderer;
 
 namespace GlitchyEngine.World
 {
@@ -55,6 +57,8 @@ namespace GlitchyEngine.World
 
 			cameraEntity
 		};
+		
+		Font _font ~ _.ReleaseRef();
 
 		/// Gets or sets the name of the scene.
 		public StringView Name
@@ -117,6 +121,8 @@ namespace GlitchyEngine.World
 					scene.InitPolygonCollider2D(e, collider);
 				}
 			});
+
+			_font = new Font(@"C:\Windows\Fonts\arial.ttf", 24);
 		}
 
 		public ~this()
@@ -768,6 +774,22 @@ namespace GlitchyEngine.World
 			}
 		}
 
+		private void BuildTexts()
+		{
+			for (let (entity, textRenderer) in _ecsWorld.Enumerate<TextRendererComponent>())
+			{
+				if (textRenderer.NeedsRebuild || textRenderer.PreparedText == null)
+				{
+					using (PreparedText preparedText = FontRenderer.PrepareText(_font, textRenderer.Text, 24, .Black))
+					{
+						textRenderer.PreparedText = preparedText;
+					}
+
+					textRenderer.NeedsRebuild = false;
+				}
+			}
+		}
+
 		public void Update(GameTime gameTime, UpdateMode mode)
 		{
 			Debug.Profiler.ProfileRendererFunction!();
@@ -807,6 +829,8 @@ namespace GlitchyEngine.World
 
 				_destroyQueue.Clear();
 			}
+
+			BuildTexts();
 		}
 
 		/// Creates a new Entity with the given name.

GlitchyEngine/src/World/SceneRenderer.bf

@@ -25,10 +25,6 @@ class SceneRenderer
 
 	public RenderTargetGroup CompositeTarget => _compositeTarget;
 
-	Font _font ~ _.ReleaseRef();
-
-	FontRenderer.PreparedText _smallLinesInfo;
-
 	public this()
 	{
 		RenderTargetGroupDescription desc = .(100, 100,
@@ -52,8 +48,6 @@ class SceneRenderer
 		_cameraTarget.[Friend]Identifier = "Camera Target";
 
 		_gammaCorrectEffect = Content.LoadAsset("Resources/Shaders/GammaCorrect.hlsl");
-
-		_font = new Font(@"C:\Windows\Fonts\arial.ttf", 24);
 	}
 
 	/// Sets the size of the viewport into which the scene will be rendered.
@@ -214,14 +208,10 @@ class SceneRenderer
 		
 		for (var (entity, transform, text, editorFlags) in Scene._ecsWorld.Enumerate<TransformComponent, TextRendererComponent, EditorFlagsComponent>())
 		{
-			if (editorFlags.Flags.HasFlag(.HideInScene))
+			if (editorFlags.Flags.HasFlag(.HideInScene) || text.PreparedText == null)
 				continue;
 			
-			_smallLinesInfo = FontRenderer.PrepareText(_font, text.Text, 24, .Black);
-
-			FontRenderer.DrawText(_smallLinesInfo, transform.WorldTransform * Matrix.Scaling(1.0f / 24.0f));
-
-			_smallLinesInfo.ReleaseRef();
+			FontRenderer.DrawText(text.PreparedText, transform.WorldTransform * Matrix.Scaling(1.0f / 24.0f));
 		}
 		
 		//FontRenderer.DrawText(_smallLinesInfo, 0, 0);