Added texture atlas

craftersmine.EtherEngine.Content/ContentManager.cs

@@ -90,6 +90,33 @@ public Texture LoadTexture(string id)
             else throw new ContentManagerException("Package does not contains object with this id \"" + id + "\"!");
         }
 
+        /// <summary>
+        /// Loads texture as texture atlas from content package with specified ID
+        /// </summary>
+        /// <param name="id">Texture ID</param>
+        /// <returns></returns>
+        public TextureAtlas LoadTextureAtlas(string id)
+        {
+            if (Contains(id))
+            {
+                ContentObject cObj = objects[id];
+                if (cObj.Type == ContentType.TextureAtlas || cObj.Type == ContentType.TextureAtlas)
+                {
+                    string path = Path.Combine(ContentPath, id + ".etx");
+                    try
+                    {
+                        return new TextureAtlas(Texture.FromFile(path));
+                    }
+                    catch (Exception ex)
+                    {
+                        throw new ContentManagerException("Unable to load object with this id \"" + id + "\" as texture atlas! " + ex.Message);
+                    }
+                }
+                else throw new ContentManagerException("Object with this id \"" + id + "\" is not a texture or texture atlas!");
+            }
+            else throw new ContentManagerException("Package does not contains object with this id \"" + id + "\"!");
+        }
+
         /// <summary>
         /// Loads animation data and animation texture from content package with specified ID
         /// </summary>
@@ -223,6 +250,10 @@ public enum ContentType
         /// </summary>
         Texture = 100,
         /// <summary>
+        /// Texture atlas
+        /// </summary>
+        TextureAtlas = 110,
+        /// <summary>
         /// Animation
         /// </summary>
         Animation = 200,

craftersmine.EtherEngine.Content/TextureAtlas.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace craftersmine.EtherEngine.Content
+{
+    /// <summary>
+    /// Represents multi-texture atlas. This class cannot be inherited
+    /// </summary>
+    public sealed class TextureAtlas
+    {
+        /// <summary>
+        /// Gets currently used texture
+        /// </summary>
+        public Texture Texture { get; private set; }
+
+        /// <summary>
+        /// Creates new instance of <see cref="TextureAtlas"/> from specified texture
+        /// </summary>
+        /// <param name="textureAtlas"></param>
+        public TextureAtlas(Texture textureAtlas)
+        {
+            Texture = textureAtlas;
+        }
+
+        /// <summary>
+        /// Cuts and returns single texture with specified rectangle bounds from atlas 
+        /// </summary>
+        /// <param name="cuttingBounds"><see cref="Rectangle"/> with specified cutting bounds</param>
+        /// <returns></returns>
+        public Texture CutFromAtlas(Rectangle cuttingBounds)
+        {
+            Bitmap bmp = new Bitmap(cuttingBounds.Width, cuttingBounds.Height);
+            var image = Graphics.FromImage(bmp);
+            image.DrawImage(Texture.BaseBitmap, new Rectangle(0, 0, cuttingBounds.Width, cuttingBounds.Height), cuttingBounds, GraphicsUnit.Pixel);
+            image.Dispose();
+
+            return new Texture(bmp);
+        }
+
+        /// <summary>
+        /// Cuts and returns single texture with specified bounds from atlas 
+        /// </summary>
+        /// <param name="x">X position of left-upper corner of cutting bounds</param>
+        /// <param name="y">Y position of left-upper corner of cutting bounds</param>
+        /// <param name="height">Height of cutting texture</param>
+        /// <param name="width">Width of cutting texture</param>
+        /// <returns></returns>
+        public Texture CutFromAtlas(int x, int y, int width, int height)
+        {
+            return CutFromAtlas(new Rectangle(x, y, width, height));
+        }
+    }
+}

craftersmine.EtherEngine.Content/craftersmine.EtherEngine.Content.csproj

@@ -63,6 +63,7 @@
     <Compile Include="ContentManagerException.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Texture.cs" />
+    <Compile Include="TextureAtlas.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>