/*
 * VariableContentManager.cs
 * Authors: August Zinsser 
 * Copyright (c) 2007-2009 Cornell University

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;

namespace Util
{
    /// <summary>
    /// This class is a simple extension of the XNA ContentManager class. It examines the available graphics hardware
    /// and attempts to load smaller textures (if available) when a Load is called on a texture that is larger than the 
    /// capability of the hardware.
    /// </summary>
    public class VariableContentManager : ContentManager
    {
        #region Fields

        private static int maxTextureWidth;
        private static int maxTextureHeight;
        private Texture2D pixel;

        #endregion

        #region Properties

        /// <summary>
        /// The maximum texture width allowed
        /// </summary>
        public int MaxTextureWidth { get { return maxTextureWidth; } }

        /// <summary>
        /// The maximum texture height allowed
        /// </summary>
        public int MaxTextureHeight { get { return maxTextureHeight; } }

        #endregion

        #region Constructor

        public VariableContentManager(IServiceProvider serviceProvider, string rootDirectory)
            : base(serviceProvider, rootDirectory)
        { }

        #endregion

        #region Methods

        /// <summary>
        /// Sets the maximum width and height based on the GraphicsDevice's capabilities
        /// </summary>
        /// <param name="graphicsDevice"></param>
        public static void SetMaxResolutionToHardwareCapabilities(GraphicsDevice graphicsDevice)
        {
            maxTextureWidth = graphicsDevice.GraphicsDeviceCapabilities.MaxTextureWidth;
            maxTextureHeight = graphicsDevice.GraphicsDeviceCapabilities.MaxTextureHeight;
        }

        /// <summary>
        /// Try to load a texture, and if an exception is thrown return a basic blank texture
        /// </summary>
        public override T Load<T>(string assetName)
        {
            try
            {
                return base.Load<T>(assetName);
            }
            catch (Exception e)
            {
                MainGame.LogError("Exception thrown from VariableContentManager with maxResolution(" + maxTextureWidth 
                    + "," + maxTextureWidth + ") when trying to load texture " + assetName + ".\n" + e.ToString());
                return base.Load<T>("blank");
            }
        }

        #endregion
    }
}