GARbro-mirror/ArcFormats/FC01/ArcMCA.cs

162 lines
5.9 KiB
C#

//! \file ArcMCA.cs
//! \date Sun Dec 06 19:12:34 2015
//! \brief F&C Co. multi-frame 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 GameRes.Formats.Properties;
using GameRes.Formats.Strings;
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.FC01
{
internal class McaArchive : ArcFile
{
public readonly byte Key;
public McaArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte key)
: base (arc, impl, dir)
{
Key = key;
}
}
[Export(typeof(ArchiveFormat))]
public class McaOpener : ArchiveFormat
{
public override string Tag { get { return "MCA"; } }
public override string Description { get { return "F&C Co. multi-frame image format"; } }
public override uint Signature { get { return 0x2041434D; } } // 'MCA'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
uint index_offset = file.View.ReadUInt32 (0x10);
int count = file.View.ReadInt32 (0x20);
if (index_offset >= file.MaxOffset || !IsSaneCount (count))
return null;
string base_name = Path.GetFileNameWithoutExtension (file.Name);
long next_offset = file.View.ReadUInt32 (index_offset);
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
if (next_offset > file.MaxOffset || next_offset <= index_offset)
return null;
index_offset += 4;
var entry = new Entry
{
Name = string.Format ("{0}#{1:D4}", base_name, i),
Offset = next_offset,
Type = "image",
};
next_offset = i+1 == count ? file.MaxOffset : file.View.ReadUInt32 (index_offset);
entry.Size = (uint)(next_offset - entry.Offset);
if (entry.Size > 0x20)
dir.Add (entry);
}
if (0 == dir.Count)
return null;
var options = Query<McgOptions> (arcStrings.MCAEncryptedNotice);
return new McaArchive (file, this, dir, options.Key);
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
var mca = (McaArchive)arc;
var input = arc.File.CreateStream (entry.Offset, entry.Size);
try
{
return new McaDecoder (input, mca.Key);
}
catch
{
input.Dispose();
throw;
}
}
public override ResourceOptions GetDefaultOptions ()
{
return new McgOptions { Key = Settings.Default.MCGLastKey };
}
public override ResourceOptions GetOptions (object widget)
{
var w = widget as GUI.WidgetMCG;
if (null != w)
Settings.Default.MCGLastKey = w.GetKey();
return GetDefaultOptions();
}
public override object GetAccessWidget ()
{
return new GUI.WidgetMCG();
}
}
internal sealed class McaDecoder : BinaryImageDecoder
{
byte m_key;
int m_method;
int m_packed_size;
int m_unpacked_size;
public McaDecoder (IBinaryStream input, byte key) : base (input)
{
m_key = key;
var header = m_input.ReadHeader (0x20);
m_method = header.ToInt32 (0);
if (m_method < 0 || m_method > 1)
throw new InvalidFormatException();
uint width = header.ToUInt32 (0xC);
uint height = header.ToUInt32 (0x10);
m_packed_size = header.ToInt32 (0x14);
m_unpacked_size = header.ToInt32 (0x18);
Info = new ImageMetaData { Width = width, Height = height, BPP = 24 };
}
protected override ImageData GetImageData ()
{
m_input.Position = 0x20;
var data = m_input.ReadBytes (m_packed_size);
MrgOpener.Decrypt (data, 0, data.Length, m_key);
if (m_method > 0)
{
using (var input = new BinMemoryStream (data))
using (var lzss = new MrgLzssReader (input, data.Length, m_unpacked_size))
{
lzss.Unpack();
data = lzss.Data;
}
}
int stride = ((int)Info.Width * 3 + 3) & ~3;
return ImageData.Create (Info, PixelFormats.Bgr24, null, data, stride);
}
}
}