GARbro-mirror/ArcFormats/Crowd/ImageCWL.cs

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2015-06-13 16:54:23 +08:00
//! \file ImageCWL.cs
//! \date Sat Jun 13 09:36:33 2015
//! \brief Crowd compressed image 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 System.Linq;
using System.Text;
using System.Windows.Media;
using GameRes.Compression;
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using GameRes.Utility;
namespace GameRes.Formats.Crowd
{
[Export(typeof(ImageFormat))]
public class CwdFormat : ImageFormat
{
public override string Tag { get { return "CWD"; } }
public override string Description { get { return "Crowd hi-color bitmap"; } }
public override uint Signature { get { return 0x20647763u; } } // 'cwd '
static readonly byte[] SignatureText = Encoding.ASCII.GetBytes ("cwd format - version 1.00 -");
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x38];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
if (!header.Take (SignatureText.Length).SequenceEqual (SignatureText))
return null;
uint key = header[0x34] + 0x259Au;
return new ImageMetaData
{
Width = LittleEndian.ToUInt32 (header, 0x2c) + key,
Height = LittleEndian.ToUInt32 (header, 0x30) + key,
BPP = 15,
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
stream.Position = 0x38;
int size = (int)info.Width * (int)info.Height * 2;
var pixels = new byte[size];
if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException ("Unexpected end of file");
return ImageData.Create (info, PixelFormats.Bgr555, null, pixels);
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("CwdFormat.Write not implemented");
}
}
[Export(typeof(ImageFormat))]
public class CwlFormat : CwdFormat
{
public override string Tag { get { return "CWL"; } }
public override string Description { get { return "LZ-compressed Crowd bitmap"; } }
public override uint Signature { get { return 0x44445A53u; } } // 'SZDD'
public override ImageMetaData ReadMetaData (Stream stream)
{
stream.Position = 0x0e;
using (var lz = new LzssReader (stream, 100, 0x38)) // extract CWD header
{
lz.FrameSize = 0x1000;
lz.FrameFill = 0x20;
lz.FrameInitPos = 0x1000 - 0x10;
lz.Unpack();
using (var cwd = new MemoryStream (lz.Data))
return base.ReadMetaData (cwd);
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
if (stream.Length > int.MaxValue)
throw new FileSizeException();
var header = new byte[14];
if (header.Length != stream.Read (header, 0, header.Length))
throw new InvalidFormatException();
int data_length = LittleEndian.ToInt32 (header, 10);
int input_length = (int)(stream.Length-stream.Position);
using (var lz = new LzssReader (stream, input_length, data_length))
{
lz.FrameSize = 0x1000;
lz.FrameFill = 0x20;
lz.FrameInitPos = 0x1000 - 0x10;
lz.Unpack();
using (var cwd = new MemoryStream (lz.Data))
return base.Read (cwd, info);
}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("CwlFormat.Write not implemented");
}
}
}