Initial commit

UI/GUI/Rendering/CanvasRenderSource.cs

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+using System;
+using System.Drawing;
+using Cosmos.Kernel.System.Graphics;
+
+namespace RemSox.UI.GUI.Rendering;
+
+public sealed class CanvasRenderSource : IRenderSource
+{
+    public void Render(IEnumerable<RenderCommand> commands)
+    {
+        Canvas canvas = FullScreenCanvas.GetFullScreenCanvas();
+
+        foreach (RenderCommand command in commands)
+        {
+            if (command.ElementType == "Window")
+            {
+                RenderWindow(canvas, command);
+                continue;
+            }
+
+            if (command.ElementType == "Circle")
+            {
+                RenderCircle(canvas, command);
+            }
+        }
+    }
+
+    private static void RenderWindow(Canvas canvas, RenderCommand command)
+    {
+        int x = command.Position.X;
+        int y = command.Position.Y;
+
+        Size size = command.Properties.TryGetValue(nameof(Size), out object? rawSize) && rawSize is Size windowSize
+            ? windowSize
+            : new Size(160, 120);
+
+        bool isFocused = command.Properties.TryGetValue(nameof(Windows.Window.IsFocused), out object? rawFocused) && rawFocused is bool focused && focused;
+
+        Color borderColor = isFocused ? Color.White : Color.DarkGray;
+        Color bodyColor = Color.FromArgb(32, 32, 32);
+        Color titleColor = isFocused ? Color.FromArgb(0, 120, 215) : Color.FromArgb(80, 80, 80);
+
+        canvas.DrawFilledRectangle(bodyColor, x, y, size.Width, size.Height);
+        canvas.DrawFilledRectangle(titleColor, x, y, size.Width, 18);
+        canvas.DrawRectangle(borderColor, x, y, size.Width, size.Height);
+    }
+
+    private static void RenderCircle(Canvas canvas, RenderCommand command)
+    {
+        Color color = command.Properties.TryGetValue(nameof(Color), out object? rawColor) && rawColor is Color circleColor
+            ? circleColor
+            : Color.White;
+
+        int radius = command.Properties.TryGetValue(nameof(Radius), out object? rawRadius) && rawRadius is int circleRadius
+            ? circleRadius
+            : 10;
+
+        int centerX = command.Position.X + radius;
+        int centerY = command.Position.Y + radius;
+
+        canvas.DrawFilledCircle(color, centerX, centerY, radius);
+    }
+
+    private static string Radius => nameof(Radius);
+}

UI/GUI/Rendering/IRenderSource.cs

@@ -0,0 +1,6 @@
+namespace RemSox.UI.GUI.Rendering;
+
+public interface IRenderSource
+{
+    public void Render(IEnumerable<RenderCommand> commands);
+}

UI/GUI/Rendering/RenderCommand.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Drawing;
+
+namespace RemSox.UI.GUI.Rendering;
+
+public class RenderCommand
+{
+    public required int ElementId { get; set; }
+    public required string ElementType { get; set; }
+    public required Point Position { get; set; }
+    public required IReadOnlyDictionary<string, object?> Properties { get; set; }
+}