#region Using Statements
using System;
using ANX.Framework.NonXNA.Development;
using ANX.Framework.NonXNA.RenderSystem;

#endregion

// This file is part of the ANX.Framework created by the
// "ANX.Framework developer group" and released under the Ms-PL license.
// For details see: http://anxframework.codeplex.com/license

namespace ANX.Framework.Graphics
{
    [PercentageComplete(100)]
    [Developer("Glatzemann")]
    [TestState(TestStateAttribute.TestState.Untested)]
    public abstract class Texture : GraphicsResource
    {
        internal INativeTexture nativeTexture;

        public int LevelCount { get; internal set; }
        public SurfaceFormat Format { get; internal set; }

        internal INativeTexture NativeTexture
		{
			get
			{
				if (this.nativeTexture == null)
				{
					ReCreateNativeTextureSurface();
				}

				return this.nativeTexture;
			}
		}

        internal Texture(GraphicsDevice graphicsDevice)
            : base(graphicsDevice)
        {
            base.GraphicsDevice.ResourceCreated += GraphicsDevice_ResourceCreated;
            base.GraphicsDevice.ResourceDestroyed += GraphicsDevice_ResourceDestroyed;
        }

        protected override void Dispose(bool disposeManaged)
        {
            if (disposeManaged)
            {
                base.GraphicsDevice.ResourceCreated -= GraphicsDevice_ResourceCreated;
                base.GraphicsDevice.ResourceDestroyed -= GraphicsDevice_ResourceDestroyed;

                if (nativeTexture != null)
                {
                    nativeTexture.Dispose();
                    nativeTexture = null;
                }
            }

            base.Dispose(disposeManaged);
        }

        internal abstract void ReCreateNativeTextureSurface();

        private void GraphicsDevice_ResourceDestroyed(object sender, ResourceDestroyedEventArgs e)
		{
			Dispose(true);
        }

        private void GraphicsDevice_ResourceCreated(object sender, ResourceCreatedEventArgs e)
		{
			Dispose(true);
            ReCreateNativeTextureSurface();
        }
    }
}