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implemented EAGLS system resources.
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morkt
parent
8265669731
commit
a313a32c03
175
ArcFormats/ArcEAGLS.cs
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175
ArcFormats/ArcEAGLS.cs
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//! \file ArcEAGLS.cs
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//! \date Fri May 15 02:52:04 2015
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//! \brief EAGLS system resource archives.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using GameRes.Utility;
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namespace GameRes.Formats.Eagls
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{
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[Export(typeof(ArchiveFormat))]
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public class PakOpener : ArchiveFormat
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{
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public override string Tag { get { return "PAK/EAGLS"; } }
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public override string Description { get { return "EAGLS engine resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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public PakOpener ()
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{
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Extensions = new string[] { "pak" };
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}
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static readonly string IndexKey = "1qaz2wsx3edc4rfv5tgb6yhn7ujm8ik,9ol.0p;/-@:^[]";
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static readonly string Key = "EAGLS_SYSTEM";
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public override ArcFile TryOpen (ArcView file)
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{
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string idx_name = Path.ChangeExtension (file.Name, ".idx");
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var idx_info = new FileInfo (idx_name);
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if (!idx_info.Exists || idx_info.Length > 0xfffff || idx_info.Length < 10000)
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return null;
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byte[] index;
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using (var idx = new ArcView (idx_name))
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index = DecryptIndex (idx);
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int index_offset = 0;
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int entry_size = index.Length / 10000;
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bool long_offsets = 40 == entry_size;
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int name_size = long_offsets ? 0x18 : 0x14;
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long first_offset = LittleEndian.ToUInt32 (index, name_size);
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var dir = new List<Entry>();
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while (index_offset < index.Length)
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{
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if (0 == index[index_offset])
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break;
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var name = Binary.GetCString (index, index_offset, name_size);
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index_offset += name_size;
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var entry = FormatCatalog.Instance.CreateEntry (name);
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if (name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
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entry.Type = "script";
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if (long_offsets)
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{
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entry.Offset = LittleEndian.ToInt64 (index, index_offset) - first_offset;
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entry.Size = LittleEndian.ToUInt32 (index, index_offset+8);
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index_offset += 0x10;
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}
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else
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{
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entry.Offset = LittleEndian.ToUInt32 (index, index_offset) - first_offset;
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entry.Size = LittleEndian.ToUInt32 (index, index_offset+4);
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index_offset += 8;
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}
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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}
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if (0 == dir.Count)
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return null;
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return new ArcFile (file, this, dir);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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if (entry.Name.EndsWith (".gr", StringComparison.InvariantCultureIgnoreCase))
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return DecryptGr (arc, entry);
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if (entry.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
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return DecryptDat (arc, entry);
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return arc.File.CreateStream (entry.Offset, entry.Size);
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}
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Stream DecryptGr (ArcFile arc, Entry entry)
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{
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var input = new byte[entry.Size];
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arc.File.View.Read (entry.Offset, input, 0, entry.Size);
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int seed = 0x75bd924 ^ input[input.Length-1];
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int limit = Math.Min (input.Length-1, 0x174b);
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for (int i = 0; i < limit; ++i)
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{
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seed = LRand (seed);
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int index = (int)(seed * 4.656612875245797e-10 * 256);
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input[i] ^= (byte)Key[index % Key.Length];
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}
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return new MemoryStream (input);
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}
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Stream DecryptDat (ArcFile arc, Entry entry)
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{
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byte[] input = new byte[entry.Size];
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arc.File.View.Read (entry.Offset, input, 0, entry.Size);
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int text_offset = 3600;
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int text_length = (int)(entry.Size - 3600 - 2);
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int seed = input[input.Length-1];
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for (int i = 0; i < text_length; i += 2)
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{
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seed = seed * 0x343FD + 0x269EC3;
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int index = (seed >> 16) & 0x7fff;
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input[text_offset + i] ^= (byte)Key[index % Key.Length];
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}
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return new MemoryStream (input);
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}
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byte[] DecryptIndex (ArcView idx)
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{
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int idx_size = (int)idx.MaxOffset-4;
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byte[] output = new byte[idx_size];
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using (var view = idx.CreateViewAccessor (0, (uint)idx.MaxOffset))
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unsafe
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{
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uint seed = view.ReadUInt32 (idx_size);
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byte* ptr = view.GetPointer (0);
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try
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{
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for (int i = 0; i < idx_size; ++i)
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{
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seed = seed * 0x343FD + 0x269EC3;
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int index = (int)(seed >> 16) & 0x7FFF;
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output[i] = (byte)(ptr[i] ^ IndexKey[index % IndexKey.Length]);
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}
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return output;
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}
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finally
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{
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view.SafeMemoryMappedViewHandle.ReleasePointer();
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}
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}
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}
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int LRand (int seed)
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{
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const int A = 48271;
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const int Q = 44488;
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const int R = 3399;
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const int M = 2147483647;
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seed = A * (seed % Q) - R * (seed / Q);
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if (seed < 0)
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seed += M;
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return seed;
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}
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}
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}
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@ -76,6 +76,7 @@
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<Compile Include="ArcBlackPackage.cs" />
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<Compile Include="ArcCommon.cs" />
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<Compile Include="ArcDRS.cs" />
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<Compile Include="ArcEAGLS.cs" />
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<Compile Include="ArcEGO.cs" />
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<Compile Include="ArcFFA.cs" />
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<Compile Include="ArcFVP.cs" />
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@ -160,6 +161,7 @@
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<Compile Include="ImageELG.cs" />
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<Compile Include="ImageEPA.cs" />
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<Compile Include="ImageGCP.cs" />
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<Compile Include="ImageGR.cs" />
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<Compile Include="ImageHG3.cs" />
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<Compile Include="ImageISG.cs" />
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<Compile Include="ImageKAAS.cs" />
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99
ArcFormats/ImageGR.cs
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99
ArcFormats/ImageGR.cs
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//! \file ImageGR.cs
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//! \date Fri May 15 04:26:58 2015
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//! \brief EAGLS system compressed bitmap.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel.Composition;
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using System.Windows.Media;
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using System.IO;
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using GameRes.Utility;
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namespace GameRes.Formats.Eagls
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{
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internal class GrMetaData : ImageMetaData
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{
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public int UnpackedSize;
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}
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[Export(typeof(ImageFormat))]
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public class GrFormat : BmpFormat
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{
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public override string Tag { get { return "GR"; } }
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public override string Description { get { return "EAGLS engine compressed bitmap"; } }
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public override uint Signature { get { return 0; } }
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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using (var reader = new LzssReader (stream, (int)stream.Length, 0x26)) // BMP header
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{
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reader.Unpack();
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var bmp = reader.Data;
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if (bmp[0] != 'B' || bmp[1] != 'M')
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return null;
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int file_size = LittleEndian.ToInt32 (bmp, 2);
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int width = LittleEndian.ToInt32 (bmp, 0x12);
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int height = LittleEndian.ToInt32 (bmp, 0x16);
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int bpp = LittleEndian.ToInt16 (bmp, 0x1c);
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int image_size = LittleEndian.ToInt32 (bmp, 0x22);
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return new GrMetaData
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{
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Width = (uint)width,
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Height = (uint)height,
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BPP = bpp,
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UnpackedSize = 24 == bpp ? file_size : (image_size+0x36),
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};
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}
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = info as GrMetaData;
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if (null == meta)
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throw new ArgumentException ("GrFormat.Read should be supplied with GrMetaData", "info");
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using (var reader = new LzssReader (stream, (int)stream.Length, meta.UnpackedSize+2))
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{
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reader.Unpack();
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if (32 != info.BPP)
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using (var bmp = new MemoryStream (reader.Data))
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return base.Read (bmp, info);
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int stride = (int)info.Width*4;
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var pixels = new byte[stride*info.Height];
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int dst = 0;
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int offset = 0x36;
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for (int src = stride*((int)info.Height-1); src >= 0; src -= stride)
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{
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Buffer.BlockCopy (reader.Data, offset+src, pixels, dst, stride);
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dst += stride;
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}
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return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
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}
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}
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public override void Write (Stream file, ImageData image)
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{
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throw new NotImplementedException ("GrFormat.Write not implemented");
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}
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}
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}
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