/*
 * TextureSizeProcessor.cs
 * Authors: Mike DeMauro
 * Copyright (c) 2007-2008 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 Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Content.Pipeline;
using Microsoft.Xna.Framework.Content.Pipeline.Graphics;
using Microsoft.Xna.Framework.Content.Pipeline.Processors;

using TInput = Microsoft.Xna.Framework.Content.Pipeline.Graphics.TextureContent;
using TOutput = Microsoft.Xna.Framework.Content.Pipeline.Graphics.TextureContent;

namespace ContentPipelineExtension
{
    /// <summary>
    /// This class will be instantiated by the XNA Framework Content Pipeline
    /// to apply custom processing to content data, converting an object of
    /// type TInput to TOutput. The input and output types may be the same if
    /// the processor wishes to alter data without changing its type.
    ///
    /// This should be part of a Content Pipeline Extension Library project.
    /// </summary>
    [ContentProcessor(DisplayName = "ContentPipelineExtension.TextureSizeProcessor")]
    public class TextureSizeProcessor : TextureProcessor
    {
        ///
        /// These values should be set to the smallest maximum size that will be supported.
        ///  
        /// <summary>
        /// Maximum width allowed for a texture.
        /// </summary>
        const int MAX_WIDTH = 2048;
        /// <summary>
        /// Maximum height allowed for a texture.
        /// </summary>
        const int MAX_HEIGHT = 2048;

        public override TOutput Process(TInput input, ContentProcessorContext context)
        {
            BitmapContent bmp = input.Faces[0][0];
            if (bmp.Width > MAX_WIDTH || bmp.Height > MAX_HEIGHT)
                throw new Exception("Texture '" + context.OutputFilename + "' exceeds maximum dimensions: " + MAX_WIDTH + "x" + MAX_HEIGHT);
            return base.Process(input, context);
        }
    }
}