Implemented normal text element.

Added `require` to load external script.

Progrart.Core/Graphics/Circle.cs

@@ -5,7 +5,7 @@ using SkiaSharp;
 
 namespace Progrart.Core.Graphics
 {
-    public class Circle : BaseElement
+	public class Circle : BaseElement
 	{
 
 		float StrokeWidth;

Progrart.Core/Graphics/Text.cs

@@ -0,0 +1,105 @@
+using Jint;
+using Jint.Native;
+using Progrart.Core.JSExecution;
+using SkiaSharp;
+
+namespace Progrart.Core.Graphics
+{
+	public class Text : BaseElement
+	{
+
+		float StrokeWidth;
+		SKPoint Position;
+		float Size;
+		SKColorF Color;
+		string str = "";
+		bool IsStroke;
+		SKShader? shader = null;
+		string? fontFamily = null;
+		public override void SetupProperties(Engine engine)
+		{
+			base.SetupProperties(engine);
+			if (__object != null)
+			{
+				{
+					JsObject point = new JsObject(engine);
+					point.Set("x", 0);
+					point.Set("y", 0);
+					__object.Set("Position", point);
+				}
+				__object.Set("StrokeWidth", 1);
+				__object.Set("Size", 1);
+				__object.Set("Text", "");
+				__object.Set("IsStroke", true);
+				__object.Set("Color", ProgrartFunctions.color(engine, 1, 1, 1, 1));
+
+			}
+
+		}
+		public override void LoadProperties()
+		{
+			if (__object is not null)
+			{
+				StrokeWidth = (float)__object.Get("StrokeWidth").AsNumber();
+				str = __object.Get("Text").AsString();
+				Size = (float)__object.Get("Size").AsNumber();
+				IsStroke = (bool)__object.Get("IsStroke").AsBoolean();
+				{
+					if (__object.Get("Position") is JsObject Start)
+					{
+						this.Position = ProgrartConversion.ObtainSKPointFromJsObject(Start);
+					}
+				}
+				{
+					if (__object.Get("Color") is JsObject Color)
+					{
+						this.Color = ProgrartConversion.ObtainSKColorFFromJsObject(Color);
+					}
+				}
+
+				if (__object.Get("Shader") is JsObject shaderObj)
+					shader = ProgrartConversion.ObtainFromJsObject(shaderObj);
+				if (__object.Get("Font") is JsString fontObj)
+					fontFamily = fontObj.AsString();
+			}
+		}
+		public override void Render(RenderContext context)
+		{
+			base.Render(context);
+			LoadProperties();
+			SKPoint pos = context.TranslatePoint(Position);
+			float Size = context.TranslateSize(this.Size);
+			if (fontFamily is not null)
+			{
+				var face = context.GetFont(fontFamily);
+				if (face != null)
+				{
+
+					context.canvas.DrawText(str,
+						pos.X, pos.Y, SKTextAlign.Center, new SKFont(face, Size) { },
+						new SKPaint()
+						{
+							ColorF = Color,
+							StrokeWidth = context.TranslateSize(StrokeWidth),
+							Shader = shader,
+							IsStroke = IsStroke,
+							IsAntialias = true
+						}
+					);
+					return;
+				}
+			}
+			context.canvas.DrawText(str,
+				pos.X, pos.Y, SKTextAlign.Center, new SKFont(SKTypeface.Default, Size) { },
+				new SKPaint()
+				{
+					ColorF = Color,
+					StrokeWidth = context.TranslateSize(StrokeWidth),
+					Shader = shader,
+					IsStroke = IsStroke,
+					IsAntialias = true
+				}
+			);
+		}
+	}
+}

Progrart.Core/Graphics/VisualRoot.cs

@@ -25,7 +25,7 @@ namespace Progrart.Core.Graphics
 		float rotate;
 		void Transform(RenderContext context)
 		{
-			Trace.WriteLine($"Visual Root: Rotation:{rotate}");
+			//Trace.WriteLine($"Visual Root: Rotation:{rotate}");
 			context.canvas.Translate(tx, ty);
 			context.canvas.RotateDegrees(rotate, context.DrawingCore.Width / 2, context.DrawingCore.Height / 2);
 			if (scale != 1)

Progrart.Core/JSExecution/ExecutionEngine.cs

@@ -1,5 +1,6 @@
 using Jint;
 using Jint.Native;
+using Jint.Runtime.Modules;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -43,6 +44,7 @@ namespace Progrart.Core.JSExecution
 			JsObject _obj = new JsObject(Engine);
 			Engine.SetValue("math", _obj);
 			Random r = new Random();
+
 			_obj.Set("random", JsObject.FromObject(Engine, new Func<double>(() =>
 			{
 				return r.NextDouble();

Progrart.Core/JSExecution/ProgrartExecutor.cs

@@ -29,6 +29,26 @@ namespace Progrart.Core.JSExecution
 				else
 					Trace.WriteLine(v);
 			}));
+			engine.Engine.SetValue("require", (string str) =>
+			{
+				require(str, () =>
+				{
+					if (str.IndexOf(".") < 0)
+					{
+						require(str + ".progrart", () => 
+						{
+							require(str + ".js", () =>
+							{
+								throw new Exception("Module not found: " + str);
+							});
+						});
+					}
+					else
+					{
+						throw new Exception("Module not found: " + str);
+					}
+				});
+			});
 			engine.Engine.SetValue("visual_root", visual_root);
 			engine.Engine.SetValue("line", line);
 			engine.Engine.SetValue("rectangle", rectangle);
@@ -40,10 +60,26 @@ namespace Progrart.Core.JSExecution
 			engine.Engine.SetValue("circle", circle);
 			engine.Engine.SetValue("color4", color4);
 			engine.Engine.SetValue("color3", color3);
+			engine.Engine.SetValue("text", text);
 			engine.Engine.SetValue("color_hex", color_hex);
 			engine.Engine.SetValue("linear_gradient", linear_gradient);
 			engine.Engine.SetValue("radial_gradient", radial_gradient);
 		}
+
+		private void require(string str, Action onNoFound)
+		{
+			var task = StorageProvider.TryOpenRead(str);
+			task.Wait();
+			var stream = task.GetAwaiter().GetResult();
+			if (stream is null)
+			{
+				onNoFound();
+				return;
+			}
+			using var sr = new StreamReader(stream);
+			engine.Engine.Execute(sr.ReadToEnd());
+		}
+
 		public JsObject color4(JsNumber r, JsNumber g, JsNumber b, JsNumber a)
 		{
 			return ProgrartFunctions.color(engine.Engine
@@ -93,6 +129,7 @@ namespace Progrart.Core.JSExecution
 		public JsObject circle() => ProgrartFunctions.CreateElement<Circle>(this);
 		public JsObject oval() => ProgrartFunctions.CreateElement<Oval>(this);
 		public JsObject triangle() => ProgrartFunctions.CreateElement<Triangle>(this);
+		public JsObject text() => ProgrartFunctions.CreateElement<Text>(this);
 
 		public RenderContext RenderImage(int Scale, string script, ExecuteArguments arguments)
 		{

Progrart.Core/PrimitiveDrawingCore.cs

@@ -4,7 +4,7 @@ using System.Diagnostics;
 
 namespace Progrart.Core
 {
-    public class PrimitiveDrawingCore : IDisposable
+	public class PrimitiveDrawingCore : IDisposable
 	{
 		internal bool isDisposed = false;
 		SKSurface surface;
@@ -13,6 +13,26 @@ namespace Progrart.Core
 		public readonly int Height;
 		public SKCanvas canvas { get; }
 		internal IStorageProvider StorageProvider;
+		Dictionary<string, SKTypeface> Fonts = new Dictionary<string, SKTypeface>();
+		public SKTypeface? GetFont(string fontName)
+		{
+			if (Fonts.ContainsKey(fontName))
+				return Fonts[fontName];
+			else
+			{
+				var task=StorageProvider.TryOpenRead(fontName);
+				task.Wait();
+				var stream=task.Result;
+				if(stream != null)
+				{
+
+					SKTypeface typeface = SKTypeface.FromStream(stream);
+					Fonts[fontName] = typeface;
+					return typeface;
+				}
+			}
+			return null;
+		}
 		public PrimitiveDrawingCore(int W, int H, IStorageProvider storageProvider)
 		{
 			Width = W;

Progrart.Core/RenderContext.cs

@@ -14,6 +14,10 @@ namespace Progrart.Core
 		{
 			this.DrawingCore = core;
 		}
+		public SKTypeface? GetFont(string fontName)
+		{
+			return DrawingCore.GetFont(fontName);
+		}
 		public SKPoint TranslatePoint(float x, float y)
 		{
 			return new SKPoint(x * DrawingCore.Width, y * DrawingCore.Height);