GARbro-mirror/ArcFormats/BeF/ImageALO.cs

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2017-10-23 12:55:38 +08:00
//! \file ImageALO.cs
//! \date 2017 Oct 22
//! \brief Ancient obfuscated BMP image.
//
// Copyright (C) 2017 by morkt
//
// 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.ComponentModel.Composition;
using System.IO;
namespace GameRes.Formats.BeF
{
[Export(typeof(ImageFormat))]
public class AloFormat : BmpFormat
{
public override string Tag { get { return "ALO"; } }
public override string Description { get { return "Obfuscated bitmap"; } }
public override uint Signature { get { return 0; } }
public override bool CanWrite { get { return true; } }
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
if (!stream.Name.HasExtension (".alo"))
return null;
var header = stream.ReadHeader (2);
if (0 != header[0] || 0 != header[1])
return null;
using (var bmp = OpenAsBitmap (stream))
return base.ReadMetaData (bmp);
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
using (var bmp = OpenAsBitmap (stream))
return base.Read (bmp, info);
}
IBinaryStream OpenAsBitmap (IBinaryStream input)
{
var header = new byte[2] { (byte)'B', (byte)'M' };
Stream stream = new StreamRegion (input.AsStream, 2, true);
stream = new PrefixStream (header, stream);
return new BinaryStream (stream, input.Name);
}
public override void Write (Stream file, ImageData image)
{
using (var bmp = new MemoryStream())
{
base.Write (bmp, image);
file.WriteByte (0);
file.WriteByte (0);
bmp.Position = 2;
bmp.CopyTo (file);
}
}
}
}