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implemented EAGLS system resources.

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morkt 2015-05-15 17:32:07 +04:00
parent 8265669731
commit a313a32c03
3 changed files with 276 additions and 0 deletions
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175
ArcFormats/ArcEAGLS.cs Normal file
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@ -0,0 +1,175 @@
//! \file ArcEAGLS.cs
//! \date Fri May 15 02:52:04 2015
//! \brief EAGLS system resource archives.
//
// 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Utility;
namespace GameRes.Formats.Eagls
{
[Export(typeof(ArchiveFormat))]
public class PakOpener : ArchiveFormat
{
public override string Tag { get { return "PAK/EAGLS"; } }
public override string Description { get { return "EAGLS engine resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public PakOpener ()
{
Extensions = new string[] { "pak" };
}
static readonly string IndexKey = "1qaz2wsx3edc4rfv5tgb6yhn7ujm8ik,9ol.0p;/-@:^[]";
static readonly string Key = "EAGLS_SYSTEM";
public override ArcFile TryOpen (ArcView file)
{
string idx_name = Path.ChangeExtension (file.Name, ".idx");
var idx_info = new FileInfo (idx_name);
if (!idx_info.Exists || idx_info.Length > 0xfffff || idx_info.Length < 10000)
return null;
byte[] index;
using (var idx = new ArcView (idx_name))
index = DecryptIndex (idx);
int index_offset = 0;
int entry_size = index.Length / 10000;
bool long_offsets = 40 == entry_size;
int name_size = long_offsets ? 0x18 : 0x14;
long first_offset = LittleEndian.ToUInt32 (index, name_size);
var dir = new List<Entry>();
while (index_offset < index.Length)
{
if (0 == index[index_offset])
break;
var name = Binary.GetCString (index, index_offset, name_size);
index_offset += name_size;
var entry = FormatCatalog.Instance.CreateEntry (name);
if (name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
entry.Type = "script";
if (long_offsets)
{
entry.Offset = LittleEndian.ToInt64 (index, index_offset) - first_offset;
entry.Size = LittleEndian.ToUInt32 (index, index_offset+8);
index_offset += 0x10;
}
else
{
entry.Offset = LittleEndian.ToUInt32 (index, index_offset) - first_offset;
entry.Size = LittleEndian.ToUInt32 (index, index_offset+4);
index_offset += 8;
}
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
if (0 == dir.Count)
return null;
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (entry.Name.EndsWith (".gr", StringComparison.InvariantCultureIgnoreCase))
return DecryptGr (arc, entry);
if (entry.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
return DecryptDat (arc, entry);
return arc.File.CreateStream (entry.Offset, entry.Size);
}
Stream DecryptGr (ArcFile arc, Entry entry)
{
var input = new byte[entry.Size];
arc.File.View.Read (entry.Offset, input, 0, entry.Size);
int seed = 0x75bd924 ^ input[input.Length-1];
int limit = Math.Min (input.Length-1, 0x174b);
for (int i = 0; i < limit; ++i)
{
seed = LRand (seed);
int index = (int)(seed * 4.656612875245797e-10 * 256);
input[i] ^= (byte)Key[index % Key.Length];
}
return new MemoryStream (input);
}
Stream DecryptDat (ArcFile arc, Entry entry)
{
byte[] input = new byte[entry.Size];
arc.File.View.Read (entry.Offset, input, 0, entry.Size);
int text_offset = 3600;
int text_length = (int)(entry.Size - 3600 - 2);
int seed = input[input.Length-1];
for (int i = 0; i < text_length; i += 2)
{
seed = seed * 0x343FD + 0x269EC3;
int index = (seed >> 16) & 0x7fff;
input[text_offset + i] ^= (byte)Key[index % Key.Length];
}
return new MemoryStream (input);
}
byte[] DecryptIndex (ArcView idx)
{
int idx_size = (int)idx.MaxOffset-4;
byte[] output = new byte[idx_size];
using (var view = idx.CreateViewAccessor (0, (uint)idx.MaxOffset))
unsafe
{
uint seed = view.ReadUInt32 (idx_size);
byte* ptr = view.GetPointer (0);
try
{
for (int i = 0; i < idx_size; ++i)
{
seed = seed * 0x343FD + 0x269EC3;
int index = (int)(seed >> 16) & 0x7FFF;
output[i] = (byte)(ptr[i] ^ IndexKey[index % IndexKey.Length]);
}
return output;
}
finally
{
view.SafeMemoryMappedViewHandle.ReleasePointer();
}
}
}
int LRand (int seed)
{
const int A = 48271;
const int Q = 44488;
const int R = 3399;
const int M = 2147483647;
seed = A * (seed % Q) - R * (seed / Q);
if (seed < 0)
seed += M;
return seed;
}
}
}

2
ArcFormats/ArcFormats.csproj
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@ -76,6 +76,7 @@
<Compile Include="ArcBlackPackage.cs" /> <Compile Include="ArcBlackPackage.cs" />
<Compile Include="ArcCommon.cs" /> <Compile Include="ArcCommon.cs" />
<Compile Include="ArcDRS.cs" /> <Compile Include="ArcDRS.cs" />
<Compile Include="ArcEAGLS.cs" />
<Compile Include="ArcEGO.cs" /> <Compile Include="ArcEGO.cs" />
<Compile Include="ArcFFA.cs" /> <Compile Include="ArcFFA.cs" />
<Compile Include="ArcFVP.cs" /> <Compile Include="ArcFVP.cs" />
@ -160,6 +161,7 @@
<Compile Include="ImageELG.cs" /> <Compile Include="ImageELG.cs" />
<Compile Include="ImageEPA.cs" /> <Compile Include="ImageEPA.cs" />
<Compile Include="ImageGCP.cs" /> <Compile Include="ImageGCP.cs" />
<Compile Include="ImageGR.cs" />
<Compile Include="ImageHG3.cs" /> <Compile Include="ImageHG3.cs" />
<Compile Include="ImageISG.cs" /> <Compile Include="ImageISG.cs" />
<Compile Include="ImageKAAS.cs" /> <Compile Include="ImageKAAS.cs" />

99
ArcFormats/ImageGR.cs Normal file
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//! \file ImageGR.cs
//! \date Fri May 15 04:26:58 2015
//! \brief EAGLS system compressed bitmap.
//
// 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.Windows.Media;
using System.IO;
using GameRes.Utility;
namespace GameRes.Formats.Eagls
{
internal class GrMetaData : ImageMetaData
{
public int UnpackedSize;
}
[Export(typeof(ImageFormat))]
public class GrFormat : BmpFormat
{
public override string Tag { get { return "GR"; } }
public override string Description { get { return "EAGLS engine compressed bitmap"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (Stream stream)
{
using (var reader = new LzssReader (stream, (int)stream.Length, 0x26)) // BMP header
{
reader.Unpack();
var bmp = reader.Data;
if (bmp[0] != 'B' || bmp[1] != 'M')
return null;
int file_size = LittleEndian.ToInt32 (bmp, 2);
int width = LittleEndian.ToInt32 (bmp, 0x12);
int height = LittleEndian.ToInt32 (bmp, 0x16);
int bpp = LittleEndian.ToInt16 (bmp, 0x1c);
int image_size = LittleEndian.ToInt32 (bmp, 0x22);
return new GrMetaData
{
Width = (uint)width,
Height = (uint)height,
BPP = bpp,
UnpackedSize = 24 == bpp ? file_size : (image_size+0x36),
};
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as GrMetaData;
if (null == meta)
throw new ArgumentException ("GrFormat.Read should be supplied with GrMetaData", "info");
using (var reader = new LzssReader (stream, (int)stream.Length, meta.UnpackedSize+2))
{
reader.Unpack();
if (32 != info.BPP)
using (var bmp = new MemoryStream (reader.Data))
return base.Read (bmp, info);
int stride = (int)info.Width*4;
var pixels = new byte[stride*info.Height];
int dst = 0;
int offset = 0x36;
for (int src = stride*((int)info.Height-1); src >= 0; src -= stride)
{
Buffer.BlockCopy (reader.Data, offset+src, pixels, dst, stride);
dst += stride;
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("GrFormat.Write not implemented");
}
}
}