added untested nine patch system.

RhythmBullet/Utilities/DataTypes/NinePatch.cs

@@ -0,0 +1,162 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Utilities.DataTypes
+{
+    public struct NinePatch
+    {
+        public Color color;
+        readonly Texture2D texture;
+        readonly int a, b, c, d;
+        private Rectangle sourceRectangle;
+        private Rectangle drawnRectangle;
+
+        /// <summary>
+        /// A nine patch object.
+        /// </summary>
+        /// <param name="texture">Texture used for the nine patch. Dimensions must be greater than their sum border counter parts.</param>
+        /// <param name="a">Left side.</param>
+        /// <param name="b">Right side.</param>
+        /// <param name="c">Bottom side.</param>
+        /// <param name="d">Top side.</param>
+        public NinePatch(Texture2D texture, int a, int b, int c, int d)
+        {
+            this.texture = texture;
+            if (a + b >= texture.Width) throw new ArgumentOutOfRangeException("a and b cannot be greater than or equal to the width of texture.");
+            if (c + d >= texture.Height) throw new ArgumentOutOfRangeException("c and d cannot be greater or equal to the height of the texture.");
+            this.a = a;
+            this.b = b;
+            this.c = c;
+            this.d = d;
+
+            sourceRectangle = new Rectangle();
+            drawnRectangle = new Rectangle();
+            color = Color.White;
+        }
+
+        public void Draw(SpriteBatch batch, Rectangle destination)
+        {
+            //1x1
+            drawnRectangle.X = destination.X;
+            drawnRectangle.Y = destination.Y;
+            drawnRectangle.Width = a;
+            drawnRectangle.Height = c;
+
+            sourceRectangle.X = 0;
+            sourceRectangle.Y = 0;
+            sourceRectangle.Width = a;
+            sourceRectangle.Height = c;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //2x1
+            drawnRectangle.X = destination.X + a;
+            drawnRectangle.Y = destination.Y;
+            drawnRectangle.Width = destination.Width - a - b;
+            drawnRectangle.Height = c;
+
+            sourceRectangle.X = a;
+            sourceRectangle.Y = 0;
+            sourceRectangle.Width = texture.Width - a - b;
+            sourceRectangle.Height = c;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //3x1
+            drawnRectangle.X = destination.X + destination.Width - b;
+            drawnRectangle.Y = destination.Y;
+            drawnRectangle.Width = b;
+            drawnRectangle.Height = c;
+
+            sourceRectangle.X = texture.Width - b;
+            sourceRectangle.Y = 0;
+            sourceRectangle.Width = b;
+            sourceRectangle.Height = c;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //1x2
+            drawnRectangle.X = destination.X;
+            drawnRectangle.Y = destination.Y + c;
+            drawnRectangle.Width = a;
+            drawnRectangle.Height = destination.Height - d - c;
+
+            sourceRectangle.X = 0;
+            sourceRectangle.Y = c;
+            sourceRectangle.Width = a;
+            sourceRectangle.Height = texture.Height - c - d;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //2x2
+            drawnRectangle.X = destination.X + a;
+            drawnRectangle.Y = destination.Y + c;
+            drawnRectangle.Width = destination.Width - a - b;
+            drawnRectangle.Height = destination.Height - c - d;
+
+            sourceRectangle.X = a;
+            sourceRectangle.Y = c;
+            sourceRectangle.Width = texture.Width - a - b;
+            sourceRectangle.Height = texture.Height - c - d;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //3x2
+            drawnRectangle.X = destination.X + destination.Width - b;
+            drawnRectangle.Y = destination.Y + c;
+            drawnRectangle.Width = b;
+            drawnRectangle.Height = destination.Height - c - d;
+
+            sourceRectangle.X = texture.Width - b;
+            sourceRectangle.Y = c;
+            sourceRectangle.Width = b;
+            sourceRectangle.Height = texture.Height - c - d;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //1x3
+            drawnRectangle.X = destination.X;
+            drawnRectangle.Y = destination.Height - d;
+            drawnRectangle.Width = a;
+            drawnRectangle.Height = d;
+
+            sourceRectangle.X = a;
+            sourceRectangle.Y = texture.Height - d;
+            sourceRectangle.Width = a;
+            sourceRectangle.Height = d;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //2x3
+            drawnRectangle.X = destination.X + a;
+            drawnRectangle.Y = destination.Height - d;
+            drawnRectangle.Width = destination.Width - a - b;
+            drawnRectangle.Height = d;
+
+            sourceRectangle.X = a;
+            sourceRectangle.Y = texture.Height - d;
+            sourceRectangle.Width = texture.Width - a - b;
+            sourceRectangle.Height = d;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+
+            //3x3
+            drawnRectangle.X = destination.X + destination.Width - b;
+            drawnRectangle.Y = destination.Height - d;
+            drawnRectangle.Width = b;
+            drawnRectangle.Height = d;
+
+            sourceRectangle.X = texture.Width - b;
+            sourceRectangle.Y = texture.Height - d;
+            sourceRectangle.Width = b;
+            sourceRectangle.Height = d;
+
+            batch.Draw(texture, drawnRectangle, sourceRectangle, color);
+        }
+    }
+}