MonoGame.Extended/Source/MonoGame.Extended/TextureAtlases/TextureAtlasReader.cs

using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using MonoGame.Extended.Content;

namespace MonoGame.Extended.TextureAtlases
{
    public class TextureAtlasReader : ContentTypeReader<TextureAtlas>
    {
        protected override TextureAtlas Read(ContentReader reader, TextureAtlas existingInstance)
        {
            var assetDirectory = ContentTypeReaderHelper.GetDirectory(reader.AssetName);
            var assetName = reader.ReadString();
            var texture = reader.ContentManager.Load<Texture2D>(assetDirectory + assetName);
            var atlas = new TextureAtlas(texture);

            var regionCount = reader.ReadInt32();

            for (var i = 0; i < regionCount; i++)
            {
                atlas.CreateRegion(
                    name: reader.ReadString(),
                    x: reader.ReadInt32(),
                    y: reader.ReadInt32(),
                    width: reader.ReadInt32(),
                    height: reader.ReadInt32());
            }

            return atlas;
        }
    }
}