76 lines
2.9 KiB
C#

//! \file ImageMB.cs
//! \date Sun Sep 18 19:05:50 2016
//! \brief Ancient obfuscated BMP image.
//
// Copyright (C) 2016 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
{
[Export(typeof(ImageFormat))]
public class MbImageFormat : ImageFormat
{
public override string Tag { get { return "BMP/MB"; } }
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)
{
int c1 = stream.ReadByte();
int c2 = stream.ReadByte();
if ('M' != c1 || ('B' != c2 && 'C' != c2))
return null;
using (var bmp = OpenAsBitmap (stream))
return Bmp.ReadMetaData (bmp);
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
using (var bmp = OpenAsBitmap (stream))
return Bmp.Read (bmp, info);
}
protected 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())
{
Bmp.Write (bmp, image);
file.WriteByte ((byte)'M');
file.WriteByte ((byte)'B');
bmp.Position = 2;
bmp.CopyTo (file);
}
}
}
}