GARbro-mirror/Legacy/Tako/ArcMPK.cs

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2018-08-20 18:45:25 +08:00
//! \file ArcMPK.cs
//! \date 2018 Aug 11
//! \brief Stdio Tako resource archive.
//
// Copyright (C) 2018 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
namespace GameRes.Formats.Tako
{
[Export(typeof(ArchiveFormat))]
public class MpkOpener : ArchiveFormat
{
public override string Tag { get { return "MPK/HG"; } }
public override string Description { get { return "Studio Tako resource archive"; } }
public override uint Signature { get { return 0x502D4748; } } // 'HG-P'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public MpkOpener ()
{
Signatures = new uint[] { 0x502D4748, 0x572D4748 };
}
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count) || VFS.IsPathEqualsToFileName (file.Name, "00.mpk"))
return null;
var list_name = VFS.ChangeFileName (file.Name, "00.mpk");
List<string> filelist;
if (VFS.FileExists (list_name))
{
using (var s = VFS.OpenStream (list_name))
using (var xs = new XoredStream (s, 0xA))
using (var reader = new StreamReader (xs, Encodings.cp932))
{
filelist = new List<string> (count);
string filename;
while ((filename = reader.ReadLine()) != null)
filelist.Add (filename);
}
}
else
{
var base_name = Path.GetFileNameWithoutExtension (file.Name);
filelist = Enumerable.Range (0, count).Select (x => string.Format ("{0}#{1:D4}", base_name, x)).ToList();
}
bool has_sizes = file.View.ReadByte (3) != 'P';
uint index_offset = 8;
uint record_size = has_sizes ? 8u : 4u;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var entry = FormatCatalog.Instance.Create<Entry> (filelist[i]);
entry.Offset = file.View.ReadUInt32 (index_offset);
if (has_sizes)
{
entry.Size = file.View.ReadUInt32 (index_offset+4);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
}
else if (entry.Offset > file.MaxOffset)
return null;
dir.Add (entry);
index_offset += record_size;
}
if (!has_sizes)
{
for (int i = 1; i < count; ++i)
{
dir[i-1].Size = (uint)(dir[i].Offset - dir[i-1].Offset);
}
dir[dir.Count-1].Size = (uint)(file.MaxOffset - dir[dir.Count-1].Offset);
}
return new ArcFile (file, this, dir);
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
var header = new byte[2] { (byte)'B', (byte)'M' };
Stream input = arc.File.CreateStream (entry.Offset, entry.Size);
input = new PrefixStream (header, input);
var bin = new BinaryStream (input, entry.Name);
try
{
return new ImageFormatDecoder (bin);
}
catch
{
bin.Dispose();
throw;
}
}
}
}