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

137 lines
5.3 KiB
C#

//! \file ArcMGR.cs
//! \date Sat Nov 21 02:05:59 2015
//! \brief Propeller multi-frame image.
//
// 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.Propeller
{
[Export(typeof(ArchiveFormat))]
public class MgrOpener : ArchiveFormat
{
public override string Tag { get { return "MGR"; } }
public override string Description { get { return "Propeller multi-frame image"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.EndsWith (".mgr", StringComparison.InvariantCultureIgnoreCase))
return null;
int count = file.View.ReadInt16 (0);
if (count <= 0 || count >= 0x100)
return null;
uint current = 2;
uint first_offset = current;
if (count > 1)
{
first_offset = file.View.ReadUInt32 (current);
if (first_offset != 2 + count * 4)
return null;
}
if (!file.View.AsciiEqual (first_offset+9, "BM"))
return null;
string base_name = Path.GetFileNameWithoutExtension (file.Name);
var dir = new List<Entry> (count);
if (count > 1)
{
for (int i = 0; i < count; ++i)
{
var entry = new PackedEntry {
Name = string.Format ("{0}#{1:D4}.bmp", base_name, i),
Type = "image",
Offset = file.View.ReadUInt32 (current),
};
if (entry.Offset < first_offset || entry.Offset >= file.MaxOffset)
return null;
dir.Add (entry);
current += 4;
}
}
else
{
dir.Add (new PackedEntry { Name = base_name+".bmp", Type = "image", Offset = current });
}
foreach (PackedEntry entry in dir)
{
entry.UnpackedSize = file.View.ReadUInt32 (entry.Offset);
entry.Size = file.View.ReadUInt32 (entry.Offset+4);
entry.IsPacked = true;
if (entry.UnpackedSize < 0x36 || entry.Size > file.MaxOffset-entry.Offset)
return null;
entry.Offset += 8;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
{
var bmp = new byte[(entry as PackedEntry).UnpackedSize];
Decompress (input, bmp);
return new BinMemoryStream (bmp, entry.Name);
}
}
static public int Decompress (Stream input, byte[] output)
{
int dst = 0;
while (dst < output.Length)
{
int count = input.ReadByte();
if (-1 == count)
break;
if (count < 0x20)
{
count = Math.Min (count+1, output.Length-dst);
int read = input.Read (output, dst, count);
dst += read;
if (read < count)
break;
}
else
{
int offset = ((count & 0x1F) << 8) + 1;
count >>= 5;
if (7 == count)
count += input.ReadByte();
offset += input.ReadByte();
if (offset >= dst)
throw new InvalidFormatException();
count = Math.Min (count+2, output.Length-dst);
Binary.CopyOverlapped (output, dst - offset, dst, count);
dst += count;
}
}
return dst;
}
}
}