GARbro-mirror/ArcFormats/ImageLZ.cs

70 lines
2.6 KiB
C#

//! \file ImageLZ.cs
//! \date Thu Feb 18 14:40:40 2016
//! \brief LZ-compressed bitmap.
//
// 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;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Compression;
namespace GameRes.Formats
{
[Export(typeof(ImageFormat))]
public class Bm_Format : BmpFormat
{
public override string Tag { get { return "BM_"; } }
public override string Description { get { return "LZ-compressed bitmap"; } }
public override uint Signature { get { return 0x44445A53u; } } // 'SZDD'
public override ImageMetaData ReadMetaData (Stream stream)
{
stream.Position = 0x0e;
using (var lz = new LzssStream (stream, LzssMode.Decompress, true))
{
lz.Config.FrameSize = 0x1000;
lz.Config.FrameFill = 0x20;
lz.Config.FrameInitPos = 0x1000 - 0x10;
return base.ReadMetaData (lz);
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
stream.Position = 0x0e;
using (var lz = new LzssStream (stream, LzssMode.Decompress, true))
{
lz.Config.FrameSize = 0x1000;
lz.Config.FrameFill = 0x20;
lz.Config.FrameInitPos = 0x1000 - 0x10;
return base.Read (lz, info);
}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("Bm_Format.Write not implemented");
}
}
}