GARbro-mirror/ArcFormats/Crowd/ImageZBM.cs
2016-10-16 09:22:53 +04:00

87 lines
3.5 KiB
C#

//! \file ImageZBM.cs
//! \date Thu Jun 11 16:24:09 2015
//! \brief LZ-compressed bitmap format.
//
// Copyright (C) 2015 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;
using GameRes.Utility;
namespace GameRes.Formats.Crowd
{
[Export(typeof(ImageFormat))]
public class ZbmFormat : BmpFormat
{
public override string Tag { get { return "ZBM"; } }
public override string Description { get { return "Crowd LZ-compressed bitmap"; } }
public override uint Signature { get { return 0x44445A53u; } } // 'SZDD'
public override bool CanWrite { get { return false; } }
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
stream.Position = 0x0e;
using (var lz = new LzssReader (stream.AsStream, 100, 54)) // extract BMP header
{
lz.FrameSize = 0x1000;
lz.FrameFill = 0x20;
lz.FrameInitPos = 0x1000 - 0x10;
lz.Unpack();
var header = lz.Data;
for (int i = 0; i < 54; ++i)
header[i] ^= 0xff;
using (var bmp = new BinMemoryStream (header, stream.Name))
return base.ReadMetaData (bmp);
}
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
if (stream.Length > int.MaxValue)
throw new FileSizeException();
var header = stream.ReadHeader (14);
int data_length = header.ToInt32 (10);
int input_length = (int)(stream.Length-stream.Position);
using (var lz = new LzssReader (stream.AsStream, input_length, data_length))
{
lz.FrameSize = 0x1000;
lz.FrameFill = 0x20;
lz.FrameInitPos = 0x1000 - 0x10;
lz.Unpack();
var data = lz.Data;
int count = Math.Min (100, data.Length);
for (int i = 0; i < count; ++i)
data[i] ^= 0xff;
using (var bmp = new BinMemoryStream (data, stream.Name))
return base.Read (bmp, info);
}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("ZbmFormat.Write not implemented");
}
}
}