added a method for generating square and circle textures

MLEM/Extensions/SpriteBatchExtensions.cs

@@ -1,3 +1,4 @@
+using System;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using MLEM.Misc;
@@ -21,18 +22,14 @@ namespace MLEM.Extensions {
             if (blankTexture == null) {
                 blankTexture = new Texture2D(batch.GraphicsDevice, 1, 1);
                 blankTexture.SetData(new[] {Color.White});
-                batch.Disposing += (sender, args) => {
+                AutoDispose(batch, blankTexture);
-                    if (blankTexture != null) {
-                        blankTexture.Dispose();
-                        blankTexture = null;
-                    }
-                };
             }
             return blankTexture;
         }
 
         /// <summary>
-        /// Generates a <see cref="NinePatch"/> that has a texture with a given color and outline color
+        /// Generates a <see cref="NinePatch"/> that has a texture with a given color and outline color.
+        /// This texture is automatically disposed of when the batch is disposed.
         /// </summary>
         /// <param name="batch">The sprite batch</param>
         /// <param name="color">The fill color of the texture</param>
@@ -46,15 +43,47 @@ namespace MLEM.Extensions {
                 outli, color, outli,
                 outli, outli, outli
             });
-            batch.Disposing += (sender, args) => {
+            AutoDispose(batch, tex);
-                if (tex != null) {
-                    tex.Dispose();
-                    tex = null;
-                }
-            };
             return new NinePatch(tex, 1);
         }
 
+        /// <summary>
+        /// Generates a 1x1 texture with the given color.
+        /// This texture is automatically disposed of when the batch is disposed.
+        /// </summary>
+        /// <param name="batch">The sprite batch</param>
+        /// <param name="color">The color of the texture</param>
+        /// <returns>A new texture with the given data</returns>
+        public static Texture2D GenerateSquareTexture(this SpriteBatch batch, Color color) {
+            var tex = new Texture2D(batch.GraphicsDevice, 1, 1);
+            tex.SetData(new[] {color});
+            AutoDispose(batch, tex);
+            return tex;
+        }
+
+        /// <summary>
+        /// Generates a texture with the given size that contains a circle.
+        /// The circle's center will be the center of the texture, and the circle will lead up to the edges of the texture.
+        /// This texture is automatically disposed of when the batch is disposed.
+        /// </summary>
+        /// <param name="batch">The sprite batch</param>
+        /// <param name="color">The color of the texture</param>
+        /// <param name="size">The width and height of the texture, and the diameter of the circle</param>
+        /// <returns>A new texture with the given data</returns>
+        public static Texture2D GenerateCircleTexture(this SpriteBatch batch, Color color, int size) {
+            var tex = new Texture2D(batch.GraphicsDevice, size, size);
+            using (var data = tex.GetTextureData()) {
+                for (var x = 0; x < tex.Width; x++) {
+                    for (var y = 0; y < tex.Height; y++) {
+                        var dist = Vector2.Distance(new Vector2(size / 2), new Vector2(x, y));
+                        data[x, y] = dist <= size / 2 ? color : Color.Transparent;
+                    }
+                }
+            }
+            AutoDispose(batch, tex);
+            return tex;
+        }
+
         /// <inheritdoc cref="SpriteBatch.Draw(Texture2D,Rectangle,Rectangle?,Color,float,Vector2,SpriteEffects,float)"/>
         public static void Draw(this SpriteBatch batch, Texture2D texture, RectangleF destinationRectangle, Rectangle? sourceRectangle, Color color, float rotation, Vector2 origin, SpriteEffects effects, float layerDepth) {
             var source = sourceRectangle ?? new Rectangle(0, 0, texture.Width, texture.Height);
@@ -72,5 +101,14 @@ namespace MLEM.Extensions {
             batch.Draw(texture, destinationRectangle, null, color);
         }
 
+        private static void AutoDispose(SpriteBatch batch, Texture2D texture) {
+            batch.Disposing += (sender, ars) => {
+                if (texture != null) {
+                    texture.Dispose();
+                    texture = null;
+                }
+            };
+        }
+
     }
 }

MLEM/Extensions/TextureExtensions.cs

@@ -10,6 +10,7 @@ namespace MLEM.Extensions {
 
         /// <summary>
         /// Returns a new instance of <see cref="TextureData"/> which allows easily managing a texture's data with texture coordinates rather than indices.
+        /// When this is used in a using statement, the texture data is automatically stored back in the texture at the end.
         /// </summary>
         /// <param name="texture">The texture whose data to get</param>
         /// <returns>The texture's data</returns>
@@ -20,7 +21,7 @@ namespace MLEM.Extensions {
         /// <summary>
         /// A struct that represents the data of a texture, accessed through <see cref="TextureExtensions.GetTextureData"/>.
         /// </summary>
-        public struct TextureData {
+        public class TextureData : IDisposable {
 
             private readonly Texture2D texture;
             private readonly Color[] data;
@@ -92,6 +93,11 @@ namespace MLEM.Extensions {
                 return x >= 0 && y >= 0 && x < this.texture.Width && y < this.texture.Height;
             }
 
+            /// <inheritdoc />
+            public void Dispose() {
+                this.Store();
+            }
+
         }
 
     }

Sandbox/GameImpl.cs

@@ -61,10 +61,11 @@ namespace Sandbox {
             };
 
             var tex = this.rawContent.Load<Texture2D>("Textures/Test");
-            var data = tex.GetTextureData();
+            using (var data = tex.GetTextureData()) {
-            data[1, 9] = Color.Pink;
+                var textureData = data;
-            data[data.FromIndex(data.ToIndex(25, 9))] = Color.Yellow;
+                textureData[1, 9] = Color.Pink;
-            data.Store();
+                textureData[textureData.FromIndex(textureData.ToIndex(25, 9))] = Color.Yellow;
+            }
 
             //var font = new GenericSpriteFont(LoadContent<SpriteFont>("Fonts/TestFont"));
             var font = new GenericBitmapFont(LoadContent<BitmapFont>("Fonts/Regular"));
@@ -134,12 +135,18 @@ namespace Sandbox {
             this.tokenized = formatter.Tokenize(font, strg);
             this.tokenized.Split(font, 400, sc);
 
+            var square = this.SpriteBatch.GenerateSquareTexture(Color.Yellow);
+            var round = this.SpriteBatch.GenerateCircleTexture(Color.Green, 1024);
+
             this.OnDraw += (g, time) => {
                 this.SpriteBatch.Begin(samplerState: SamplerState.PointClamp);
-                this.SpriteBatch.FillRectangle(new RectangleF(400, 20, 400, 1000), Color.Green);
+                this.SpriteBatch.Draw(square, new Rectangle(10, 10, 400, 400), Color.White);
-                font.DrawString(this.SpriteBatch, this.tokenized.DisplayString, new Vector2(400, 20), Color.White * 0.25F, 0, Vector2.Zero, sc, SpriteEffects.None, 0);
+                this.SpriteBatch.Draw(round, new Rectangle(10, 10, 400, 400), Color.White);
-                this.tokenized.Draw(time, this.SpriteBatch, new Vector2(400, 20), font, Color.White, sc, 0);
+
-                this.SpriteBatch.DrawGrid(new Vector2(30, 30), new Vector2(40, 60), new Point(10, 5), Color.Yellow, 3);
+                //this.SpriteBatch.FillRectangle(new RectangleF(400, 20, 400, 1000), Color.Green);
+                //font.DrawString(this.SpriteBatch, this.tokenized.DisplayString, new Vector2(400, 20), Color.White * 0.25F, 0, Vector2.Zero, sc, SpriteEffects.None, 0);
+                //this.tokenized.Draw(time, this.SpriteBatch, new Vector2(400, 20), font, Color.White, sc, 0);
+                //this.SpriteBatch.DrawGrid(new Vector2(30, 30), new Vector2(40, 60), new Point(10, 5), Color.Yellow, 3);
                 this.SpriteBatch.End();
             };
             this.OnUpdate += (g, time) => {