recrownedgtk/RecrownedAthenaeum/DataTypes/TextureAtlas.cs

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using RecrownedAthenaeum.DataTypes;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace RecrownedAthenaeum.DataTypes
{
    public class TextureAtlas
    {
        private Texture2D texture;
        private Dictionary<string, TextureAtlasRegion> dictionaryOfRegions = new Dictionary<string, TextureAtlasRegion>();

        public TextureAtlas(Texture2D texture, TextureAtlasRegion[] regions)
        {
            this.texture = texture;
            foreach (TextureAtlasRegion region in regions)
            {
                dictionaryOfRegions.Add(region.name, region);
            }
        }

        public void Draw(string name, SpriteBatch batch, Rectangle destination, Color color, float rotation = 0, Vector2 origin = new Vector2())
        {
            dictionaryOfRegions[name].Draw(batch, destination, texture, color, rotation, origin);
        }


        public Texture2D TextureOfRegion(string name, GraphicsDevice graphicsDevice)
        {
            return dictionaryOfRegions[name].AsTexture2D(graphicsDevice, texture);
        }

        public struct TextureAtlasRegion : IComparable<TextureAtlasRegion>, IDisposable
        {
            public string name;
            Rectangle sourceRectangle;
            NinePatch ninepatch;
            Texture2D regionTexture;

            public void Draw(SpriteBatch batch, Rectangle destination, Texture2D fromTexture, Color color, float rotation, Vector2 origin)
            {
                batch.Draw(fromTexture, destination, sourceRectangle, color, rotation, origin, SpriteEffects.None, 0f);
            }

            public Texture2D AsTexture2D(GraphicsDevice graphicsDevice, Texture2D textureAtlas)
            {
                if (regionTexture == null)
                {
                    Color[] data = new Color[sourceRectangle.Width * sourceRectangle.Height];
                    regionTexture = new Texture2D(graphicsDevice, sourceRectangle.Width, sourceRectangle.Height);
                    textureAtlas.GetData(0, sourceRectangle, data, 0, sourceRectangle.Width * sourceRectangle.Height);
                    regionTexture.SetData(data);
                }
                return regionTexture;
            }

            public int CompareTo(TextureAtlasRegion other)
            {
                return name.CompareTo(other);
            }

            public void Dispose()
            {
                regionTexture?.Dispose();
            }
        }
    }
}