Save All is now working.

Size is now a relative value in Line.

Progrart.Core/Graphics/Line.cs

@@ -77,7 +77,7 @@ namespace Progrart.Core.Graphics
 				new SKPaint()
 				{
 					ColorF = Color,
-					StrokeWidth = Size,
+					StrokeWidth = context.TranslateSize(Size),
 					Shader = shader
 				}
 			);

Progrart.Core/Graphics/Rectangle.cs

@@ -6,7 +6,7 @@ using System.Diagnostics;
 
 namespace Progrart.Core.Graphics
 {
-    public class Rectangle : BaseElement
+	public class Rectangle : BaseElement
 	{
 
 		float StrokeWidth;
@@ -78,7 +78,7 @@ namespace Progrart.Core.Graphics
 				new SKPaint()
 				{
 					ColorF = Color,
-					StrokeWidth = StrokeWidth,
+					StrokeWidth = context.TranslateSize(StrokeWidth),
 					Shader = shader
 				}
 			);

Progrart.Core/JSExecution/ProgrartExecutor.cs

@@ -82,7 +82,11 @@ namespace Progrart.Core.JSExecution
 			{
 				height = (float)(js_height.AsNumber());
 			}
-			RenderContext renderContext = new RenderContext((int)(width * Scale), (int)(width * Scale));
+			RenderContext renderContext = new RenderContext((int)(width * Scale), (int)(width * Scale))
+			{
+				LogicalW = width,
+				LogicalH = height
+			};
 			ImageRoot imageRoot = new ImageRoot();
 
 			var img = engine.Engine.Call("main");

Progrart.Core/RenderContext.cs

@@ -8,6 +8,8 @@ namespace Progrart.Core
 		public PrimitiveDrawingCore DrawingCore { get; }
 
 		public SKCanvas canvas { get => DrawingCore.canvas; }
+		public float LogicalW;
+		public float LogicalH;
 		public RenderContext(PrimitiveDrawingCore core)
 		{
 			this.DrawingCore = core;
@@ -20,6 +22,10 @@ namespace Progrart.Core
 		{
 			return TranslatePoint(point.X, point.Y);
 		}
+		public float TranslateSize(float s)
+		{
+			return (float)(s *  Math.Sqrt(DrawingCore.Width * DrawingCore.Width + DrawingCore.Height * DrawingCore.Height)/ Math.Sqrt(LogicalH * LogicalH + LogicalW * LogicalW));
+		}
 		public RenderContext(int W, int H)
 		{
 			DrawingCore = new PrimitiveDrawingCore(W, H);