/////////////////////////////////////////////////////////////////////////////////

// Copyright (C) 2006, Frank Blumenberg

// 

// See License.txt for complete licensing and attribution information.

// Permission is hereby granted, free of charge, to any person obtaining a copy 

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 

// copies of the Software, and to permit persons to whom the Software is 

// furnished to do so, subject to the following conditions:

// 

// The above copyright notice and this permission notice shall be included in all

// copies or substantial portions of the Software.

// 

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 

// THE SOFTWARE.

// 

/////////////////////////////////////////////////////////////////////////////////

using System;

using System.Collections.Generic;



namespace Photoshop

{

  /// <summary>

  /// The names of the alpha channels

  /// </summary>

  public class AlphaChannels : ImageResource

  {

    private List<string> m_channelNames=new List<string>();

    public List<string> ChannelNames

    {

      get { return m_channelNames; }

    }



    public AlphaChannels(): base((short)ResourceIDs.AlphaChannelNames)

    {

    }



    public AlphaChannels(ImageResource imgRes)

      : base(imgRes)

    {

      

      BinaryReverseReader reader = imgRes.DataReader;

      // the names are pascal strings without padding!!!

      while ((reader.BaseStream.Length - reader.BaseStream.Position) > 0)

      {

        byte stringLength = reader.ReadByte();

        string s = new string(reader.ReadChars(stringLength));

        if(s.Length>0)

          m_channelNames.Add(s);

      }

      reader.Close();

    }



    protected override void StoreData()

    {

      System.IO.MemoryStream stream = new System.IO.MemoryStream();

      BinaryReverseWriter writer = new BinaryReverseWriter(stream);



      foreach (string name in m_channelNames)

      {

        writer.Write((byte)name.Length);

        writer.Write(name.ToCharArray());

      }



      writer.Close();

      stream.Close();



      Data = stream.ToArray();

    }

  }

}