using ANX.Framework.NonXNA.RenderSystem;

// 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
{
    public abstract class Texture : GraphicsResource
    {
        protected internal int levelCount;
        protected internal SurfaceFormat format;
		protected internal INativeTexture nativeTexture;

		public int LevelCount
		{
			get
			{
				return this.levelCount;
			}
		}

		public SurfaceFormat Format
		{
			get
			{
				return this.format;
			}
		}

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

				return this.nativeTexture;
			}
		}

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

        ~Texture()
        {
            base.GraphicsDevice.ResourceCreated -= GraphicsDevice_ResourceCreated;
            base.GraphicsDevice.ResourceDestroyed -= GraphicsDevice_ResourceDestroyed;
        }

        public override void Dispose()
        {
            Dispose(true);
        }

        protected override void Dispose(bool disposeManaged)
        {
            if (disposeManaged && nativeTexture != null)
            {
                nativeTexture.Dispose();
                nativeTexture = null;
            }
        }

        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();
        }
    }
}