Start of text renderer component

- UC, LC, IC, RC tags

GlitchyEditor/resources/Shaders/msdfShader.hlsl

@@ -74,7 +74,11 @@ float4 PS(PS_Input input) : SV_Target0
     float screenPxDistance = ScreenPxRange(input.TexCoord) * (sd - 0.5);
     float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
 
-    return float4(input.Color.rgb, opacity * input.Color.a);
+    clip(opacity - 0.001f);
+
+    //return float4(input.Color.rgb, opacity * input.Color.a) * 0.0001f + float4(opacity.xxxx);
+    return input.Color * opacity; // TODO: This is not quite right // float4(input.Color.rgb, input.Color.a * opacity);
+    //return float4(input.Color.rgb, opacity * input.Color.a) * 0.0001f + float4(msd, 1.0f);
 }
 
 /*

GlitchyEditor/src/EditWindows/ComponentEditWindow.bf

@@ -9,6 +9,7 @@ using GlitchyEngine.Content;
 using GlitchyEngine.Scripting;
 using GlitchyEngine.Core;
 using Mono;
+using GlitchyEngine.World.Components;
 
 namespace GlitchyEditor.EditWindows
 {
@@ -81,9 +82,12 @@ namespace GlitchyEditor.EditWindows
 			
 			ShowComponentEditor<SpriteRendererComponent>("Sprite Renderer", entity, => ShowSpriteRendererComponentEditor, => ShowComponentContextMenu<SpriteRendererComponent>);
 			ShowComponentEditor<CircleRendererComponent>("Circle Renderer", entity, => ShowCircleRendererComponentEditor, => ShowComponentContextMenu<CircleRendererComponent>);
+			ShowComponentEditor<TextRendererComponent>("Text Renderer", entity, => ShowTextRendererComponentEditor, => ShowComponentContextMenu<TextRendererComponent>);
+
 			ShowComponentEditor<MeshRendererComponent>("Mesh Renderer", entity, => ShowMeshRendererComponentEditor, => ShowComponentContextMenu<MeshRendererComponent>);
 			ShowComponentEditor<LightComponent>("Light", entity, => ShowLightComponentEditor, => ShowComponentContextMenu<LightComponent>);
 			ShowComponentEditor<MeshComponent>("Mesh", entity, => ShowMeshComponentEditor, => ShowComponentContextMenu<MeshComponent>);
+
 			ShowComponentEditor<Rigidbody2DComponent>("Rigidbody 2D", entity, => ShowRigidBody2DComponentEditor, => ShowComponentContextMenu<Rigidbody2DComponent>);
 			ShowComponentEditor<BoxCollider2DComponent>("Box collider 2D", entity, => ShowBoxCollider2DComponentEditor, => ShowComponentContextMenu<BoxCollider2DComponent>);
 			ShowComponentEditor<CircleCollider2DComponent>("Circle collider 2D", entity, => ShowCircleCollider2DComponentEditor, => ShowComponentContextMenu<CircleCollider2DComponent>);
@@ -454,6 +458,49 @@ namespace GlitchyEditor.EditWindows
 			ImGui.DragFloat("##Inner Radius", &circleRendererComponent.InnerRadius, 0.1f, 0.0f, 1.0f);
 		}
 		
+		static int InputTextCallback(ImGui.InputTextCallbackData* data)
+		{
+			if (data.EventFlag == .CallbackResize)
+			{
+				String str = (String)Internal.UnsafeCastToObject(data.UserData);
+
+				Log.EngineLogger.AssertDebug(str.Ptr == data.Buf);
+
+				str.PadRight(data.BufTextLen * 2, '\0');
+				data.Buf = str.Ptr;
+
+				return 0;
+			}
+
+			return 0;
+		}
+
+		private static void ShowTextRendererComponentEditor(Entity entity, TextRendererComponent* textRendererComponent)
+		{
+			StartNewProperty("Text");
+
+			String text = textRendererComponent.[Friend]_text;
+
+			if (text == null)
+			{
+				text = textRendererComponent.[Friend]_text = new String();
+			}
+
+			text?.EnsureNullTerminator();
+
+			if (ImGui.InputTextMultiline("##text", text.Ptr, (uint64)text.Length, .Zero, .CallbackResize, => InputTextCallback, Internal.UnsafeCastToPtr(text)))
+			{
+				// To deleting text, ImGui simply puts a null char after the remaining text.
+				// Search for null char and set the length of the string accordingly.
+				int length = text.IndexOf('\0');
+
+				if (length >= 0)
+				{
+					text.Length = length;
+				}
+			}
+		}
+
 		private static void ShowMeshRendererComponentEditor(Entity entity, MeshRendererComponent* meshRendererComponent)
 		{
 			StartNewProperty("Material");
@@ -844,6 +891,7 @@ namespace GlitchyEditor.EditWindows
 				ShowComponentButton<CameraComponent>("Camera");
 				ShowComponentButton<SpriteRendererComponent>("Sprite Renderer");
 				ShowComponentButton<CircleRendererComponent>("Circle Renderer");
+				ShowComponentButton<TextRendererComponent>("Text Renderer");
 				ShowComponentButton<LightComponent>("Light");
 				ShowComponentButton<Rigidbody2DComponent>("Rigidbody 2D");
 				ShowComponentButton<BoxCollider2DComponent>("Box collider 2D");

GlitchyEngine/src/Renderer/Text/FontRenderer.bf

@@ -5,6 +5,7 @@ using GlitchyEngine.Math;
 using System.Collections;
 using GlitchyEngine.Core;
 using GlitchyEngine.Content;
+using System.Text;
 using static FreeType.HarfBuzz;
 
 using internal GlitchyEngine.Renderer.Text;
@@ -126,7 +127,15 @@ namespace GlitchyEngine.Renderer.Text
 			case BottomToTop;
 		}
 
-		public static PreparedText PrepareText(Font font, String text, float fontSize, Color fontColor = .White, Color bitmapColor = .White, float lineSpaceScale = 1.0f, TextDirection direction = .LeftToRight)
+		public enum TextCase
+		{
+			case RetainCase;
+			case UpperCase;
+			case LowerCase;
+			case InvertCase;
+		}
+
+		public static PreparedText PrepareText(Font font, StringView text, float fontSize, Color fontColor = .White, Color bitmapColor = .White, float lineSpaceScale = 1.0f, TextDirection direction = .LeftToRight)
 		{
 			Debug.Profiler.ProfileRendererFunction!();
 
@@ -143,17 +152,18 @@ namespace GlitchyEngine.Renderer.Text
 			// Position of the next character on the line
 			float penPosition = 0;
 
-			// TODO: use stringview?
-			StringView textBuffer = .(text, 0, 0);//new:ScopedAlloc! String();
+			List<char32> chars = new:ScopedAlloc! .(text.Length);
+			int runStart = 0;
 
 			hb_buffer_t* buf = hb_buffer_create();
 
-			//PreparedLine currentLine = new PreparedLine();
-
 			// Stack to keep track of the text direction.
 			List<TextDirection> textDirectionStack = scope .();
 			textDirectionStack.Add(direction);
 
+			List<TextCase> textCaseStack = scope .();
+			textCaseStack.Add(.RetainCase);
+
 			int movedLines = 0;
 
 			Font currentFont = font;
@@ -168,10 +178,9 @@ namespace GlitchyEngine.Renderer.Text
 
 				hb_buffer_clear_contents(buf);
 
-				hb_buffer_add_utf8(buf, text.Ptr, (.)text.Length, (.)(textBuffer.Ptr - text.Ptr), (.)textBuffer.Length);
+				hb_buffer_add_utf32(buf, chars.Ptr, (.)chars.Count, (.)runStart, (.)(chars.Count - runStart));
 
-				textBuffer.Ptr += textBuffer.Length;
-				textBuffer.Length = 0;
+				runStart = chars.Count;
 
 				// Set the script, language and direction of the buffer.
 				// TODO: change direction, script, etc.
@@ -226,6 +235,8 @@ namespace GlitchyEngine.Renderer.Text
 				penPosition = 0;
 			}
 
+			bool escapeNextChar = false;
+
 			for (char32 char in text.DecodedChars)
 			{
 				defer
@@ -233,16 +244,21 @@ namespace GlitchyEngine.Renderer.Text
 					currentIndex = @char.NextIndex;
 				}
 
-				switch(char)
+				void DoLineBreak()
 				{
-				case '\n':
+					chars.Add('\n');
 					// Only flush after the first new line
 					if (movedLines == 0)
 						FlushShapeBuffer();
 
 					// carriage return
 					movedLines++;
+				}
 
+				switch(char)
+				{
+				case '\n':
+					DoLineBreak();
 					continue;
 				case '\u{240}':
 					FlushShapeBuffer();
@@ -274,6 +290,107 @@ namespace GlitchyEngine.Renderer.Text
 						textDirectionStack.PopBack();
 
 					continue;
+				case '\\':
+					if (escapeNextChar)
+						break;
+					else
+					{
+						escapeNextChar = true;
+						continue;
+					}
+				case '<':
+					if (escapeNextChar)
+						break;
+
+					// Copy the char enumerator to make a lookahead
+					String.UTF8Enumerator tagEnumerator = @char;
+
+					String tagText = scope .();
+
+					int endIndex = -1;
+
+					for (char32 tagChar in tagEnumerator)
+					{
+						if (tagChar == '>')
+						{
+							endIndex = tagEnumerator.NextIndex;
+							break;
+						}
+						else
+						{
+							UTF32.Decode(Span<char32>(&tagChar, 1), tagText);
+						}
+					}
+
+					// It seems that it's just an unescaped <
+					if (endIndex == -1)
+						break; // TODO: Probably warn or something
+
+					bool isEndTag = tagText.StartsWith('/');
+
+					if (isEndTag)
+						tagText.Remove(0);
+
+					switch(tagText)
+					{
+					case "b", "bold":
+						// bold
+					case "br", "linebreak":
+						DoLineBreak();
+					case "u", "underline":
+						// underlined
+					case "i", "italic":
+						// italic
+					case "small":
+					case "sub", "subscript":
+					case "sup", "superscript":
+					case "s", "strikethrough":
+
+						// Text case control
+					case "lc", "lowercase":
+						if (isEndTag && textCaseStack.Count > 0)
+							textCaseStack.PopBack();
+						else
+							textCaseStack.Add(.LowerCase);
+					case "uc", "uppercase":
+						if (isEndTag && textCaseStack.Count > 0)
+							textCaseStack.PopBack();
+						else
+							textCaseStack.Add(.UpperCase);
+					case "rc", "retaincase":
+						if (isEndTag && textCaseStack.Count > 0)
+							textCaseStack.PopBack();
+						else
+							textCaseStack.Add(.RetainCase);
+					case "ic", "invertcase":
+						if (isEndTag && textCaseStack.Count > 0)
+							textCaseStack.PopBack();
+						else
+							textCaseStack.Add(.InvertCase);
+
+					}
+					
+					// Skip the tag in the main enumerator
+					@char.NextIndex = endIndex;
+
+					continue;
+				}
+
+				escapeNextChar = false;
+
+				switch (textCaseStack.Back)
+				{
+				case .RetainCase:
+					// Nothing to do
+				case .LowerCase:
+					char = char.ToLower;
+				case .UpperCase:
+					char = char.ToUpper;
+				case .InvertCase:
+					if (char.IsUpper)
+						char = char.ToLower;
+					else if (char.IsLower)
+						char = char.ToUpper;
 				}
 
 				// Get the font that can draw the char. Use the given font if no fallback is found (will draw the "missing glyph").
@@ -299,12 +416,7 @@ namespace GlitchyEngine.Renderer.Text
 					movedLines = 0;
 				}
 
-				//textBuffer.Append(char);
-				if(textBuffer.Length == 0)
-				{
-					textBuffer.Ptr = text.Ptr + currentIndex;
-				}
-				textBuffer.Length += @char.NextIndex - currentIndex;
+				chars.Add(char);
 			}
 			
 			FlushShapeBuffer();
@@ -336,7 +448,7 @@ namespace GlitchyEngine.Renderer.Text
 			Renderer2D.[Friend]s_currentQuadEffect = _msdfEffect;
 			// TODO: oh no....
 			// Copy viewProjection from current effect
-			Matrix viewProjection = lastEffect.Variables["ViewProjection"].[Friend]GetData<Matrix>();
+			Matrix viewProjection = Renderer2D.[Friend]s_quadBatchEffect.Variables["ViewProjection"].[Friend]GetData<Matrix>();
 			_msdfEffect.Variables["ViewProjection"].SetData(viewProjection);
 			
 			// TODO: this doesn't really work with fallback fonts

GlitchyEngine/src/World/Components/TextRendererComponent.bf

@@ -0,0 +1,32 @@
+using System;
+namespace GlitchyEngine.World.Components;
+
+struct TextRendererComponent : IDisposableComponent
+{
+	private String _text;
+
+	private bool _isRichText;
+
+	public StringView Text
+	{
+		get => _text;
+		set mut
+		{
+			if (_text == null)
+				_text = new String();
+
+			_text.Set(value);
+		}
+	}
+
+	public bool IsRichText
+	{
+		get => _isRichText;
+		set mut => _isRichText = value;
+	}
+
+	public void Dispose()
+	{
+		delete _text;
+	}
+}

GlitchyEngine/src/World/SceneRenderer.bf

@@ -3,6 +3,7 @@ using GlitchyEngine.Content;
 using GlitchyEngine.Math;
 using System;
 using GlitchyEngine.World.Components;
+using GlitchyEngine.Renderer.Text;
 
 namespace GlitchyEngine.World;
 
@@ -24,6 +25,10 @@ class SceneRenderer
 
 	public RenderTargetGroup CompositeTarget => _compositeTarget;
 
+	Font _font ~ _.ReleaseRef();
+
+	FontRenderer.PreparedText _smallLinesInfo;
+
 	public this()
 	{
 		RenderTargetGroupDescription desc = .(100, 100,
@@ -47,6 +52,8 @@ 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.
@@ -205,6 +212,20 @@ class SceneRenderer
 			Renderer2D.DrawCircle(transform.WorldTransform, circle, entity.Index);
 		}
 		
+		for (var (entity, transform, text, editorFlags) in Scene._ecsWorld.Enumerate<TransformComponent, TextRendererComponent, EditorFlagsComponent>())
+		{
+			if (editorFlags.Flags.HasFlag(.HideInScene))
+				continue;
+			
+			_smallLinesInfo = FontRenderer.PrepareText(_font, text.Text, 24, .Black);
+
+			FontRenderer.DrawText(_smallLinesInfo, transform.WorldTransform * Matrix.Scaling(1.0f / 24.0f));
+
+			_smallLinesInfo.ReleaseRef();
+		}
+		
+		//FontRenderer.DrawText(_smallLinesInfo, 0, 0);
+
 		Renderer2D.EndScene();
 
 		Renderer2D.BeginScene(camera, .BackToFront);

GlitchyEngine/src/World/SceneSerializer.bf

@@ -249,6 +249,12 @@ class SceneSerializer
 			{
 				Serialize.Value(writer, "Flags", component.Flags);
 			});
+
+			SerializeComponent<TextRendererComponent>(writer, entity, "TextRenderer", scope (component) =>
+			{
+				Serialize.Value(writer, "IsRichText", component.IsRichText);
+				Serialize.Value(writer, "Text", component.Text);
+			});
 		}
 
 		writer.EntryEnd();
@@ -671,6 +677,27 @@ class SceneSerializer
 				{
 					Try!(Deserialize.Value(reader, "Flags", out component.Flags));
 
+					return .Ok;
+				}));
+			case "TextRenderer":
+				Try!(DeserializeComponent<TextRendererComponent>(reader, entity, scope (component) =>
+				{
+					Try!(Deserialize.Value<bool>(reader, "IsRichText", let isRichText));
+					component.IsRichText = isRichText;
+					
+					Try!(reader.EntryEnd());
+
+					String text = null;
+
+					Try!(Deserialize.Value<String>(reader, "Text", out text));
+
+					if (text != null)
+					{
+						component.Text = text;
+
+						delete text;
+					}
+
 					return .Ok;
 				}));
 			default: