mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-27 15:44:00 +08:00
323 lines
11 KiB
C#
323 lines
11 KiB
C#
//! \file ImageMCG.cs
|
|
//! \date Mon Jul 13 17:58:33 2015
|
|
//! \brief F&C Co. 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 System;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel.Composition;
|
|
using System.IO;
|
|
using System.Windows.Media;
|
|
using System.Windows.Media.Imaging;
|
|
using GameRes.Formats.Properties;
|
|
using GameRes.Formats.Strings;
|
|
using GameRes.Utility;
|
|
|
|
namespace GameRes.Formats.FC01
|
|
{
|
|
internal class McgMetaData : ImageMetaData
|
|
{
|
|
public int DataOffset;
|
|
public int PackedSize;
|
|
public int Version;
|
|
}
|
|
|
|
internal class McgOptions : ResourceOptions
|
|
{
|
|
public byte Key;
|
|
}
|
|
|
|
[Serializable]
|
|
public class McgScheme : ResourceScheme
|
|
{
|
|
public Dictionary<string, byte> KnownKeys;
|
|
}
|
|
|
|
[Export(typeof(ImageFormat))]
|
|
public class McgFormat : ImageFormat
|
|
{
|
|
public override string Tag { get { return "MCG"; } }
|
|
public override string Description { get { return "F&C Co. image format"; } }
|
|
public override uint Signature { get { return 0x2047434D; } } // 'MCG'
|
|
|
|
public static Dictionary<string, byte> KnownKeys = new Dictionary<string, byte>();
|
|
|
|
public override ResourceScheme Scheme
|
|
{
|
|
get { return new McgScheme { KnownKeys = KnownKeys }; }
|
|
set { KnownKeys = ((McgScheme)value).KnownKeys; }
|
|
}
|
|
|
|
public override ImageMetaData ReadMetaData (IBinaryStream stream)
|
|
{
|
|
var header = stream.ReadHeader (0x40);
|
|
if (header[5] != '.')
|
|
return null;
|
|
int version = header[4] * 100 + header[6] * 10 + header[7] - 0x14D0;
|
|
if (version != 200 && version != 101)
|
|
throw new NotSupportedException ("Not supported MCG format version");
|
|
int header_size = header.ToInt32 (0x10);
|
|
if (header_size < 0x40)
|
|
return null;
|
|
int bpp = header.ToInt32 (0x24);
|
|
if (24 != bpp && 8 != bpp)
|
|
throw new NotSupportedException ("Not supported MCG image bitdepth");
|
|
int packed_size = header.ToInt32 (0x38);
|
|
return new McgMetaData
|
|
{
|
|
Width = header.ToUInt32 (0x1c),
|
|
Height = header.ToUInt32 (0x20),
|
|
OffsetX = header.ToInt32 (0x14),
|
|
OffsetY = header.ToInt32 (0x18),
|
|
BPP = bpp,
|
|
DataOffset = header_size,
|
|
PackedSize = packed_size,
|
|
Version = version,
|
|
};
|
|
}
|
|
|
|
// cache key value so that dialog does not pop up on every file accessed.
|
|
byte? LastKey = null;
|
|
|
|
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
|
|
{
|
|
var meta = (McgMetaData)info;
|
|
byte key = Settings.Default.MCGLastKey;
|
|
if (101 == meta.Version)
|
|
{
|
|
if (null == LastKey)
|
|
{
|
|
var options = Query<McgOptions> (arcStrings.ArcImageEncrypted);
|
|
key = options.Key;
|
|
}
|
|
else
|
|
key = LastKey.Value;
|
|
}
|
|
var reader = new McgDecoder (stream, meta, key);
|
|
reader.Unpack();
|
|
if (reader.Key != 0)
|
|
LastKey = reader.Key;
|
|
return ImageData.Create (info, reader.Format, reader.Palette, reader.Data, reader.Stride);
|
|
}
|
|
|
|
public override void Write (Stream file, ImageData image)
|
|
{
|
|
throw new System.NotImplementedException ("McgFormat.Write not implemented");
|
|
}
|
|
|
|
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();
|
|
}
|
|
}
|
|
|
|
// mcg decompression // graphic.unt @ 100047B0
|
|
|
|
internal class McgDecoder
|
|
{
|
|
byte[] m_input;
|
|
byte[] m_output;
|
|
int m_width;
|
|
int m_height;
|
|
int m_pixels;
|
|
byte m_key;
|
|
IBinaryStream m_file;
|
|
McgMetaData m_info;
|
|
|
|
public byte Key { get { return m_key; } }
|
|
public byte[] Data { get { return m_output; } }
|
|
public int Stride { get; private set; }
|
|
public PixelFormat Format { get; private set; }
|
|
public BitmapPalette Palette { get; private set; }
|
|
|
|
public McgDecoder (IBinaryStream input, McgMetaData info, byte key)
|
|
{
|
|
m_file = input;
|
|
m_info = info;
|
|
m_width = (int)info.Width;
|
|
m_height = (int)info.Height;
|
|
m_pixels = m_width*m_height;
|
|
m_key = key;
|
|
Stride = m_width * m_info.BPP / 8;
|
|
if (101 == m_info.Version)
|
|
Stride = (Stride + 3) & -4;
|
|
if (24 == m_info.BPP)
|
|
Format = PixelFormats.Bgr24;
|
|
else if (8 == m_info.BPP)
|
|
Format = PixelFormats.Indexed8;
|
|
else
|
|
throw new InvalidFormatException();
|
|
}
|
|
|
|
static readonly byte[] ChannelOrder = { 1, 0, 2 };
|
|
|
|
public void Unpack ()
|
|
{
|
|
m_file.Position = m_info.DataOffset;
|
|
int input_size = m_info.PackedSize;
|
|
if (0 == input_size)
|
|
input_size = (int)m_file.Length;
|
|
input_size -= m_info.DataOffset;
|
|
if (8 == m_info.BPP)
|
|
{
|
|
Palette = ImageFormat.ReadPalette (m_file.AsStream);
|
|
input_size -= 0x400;
|
|
}
|
|
m_input = m_file.ReadBytes (input_size);
|
|
if (m_input.Length != input_size)
|
|
throw new InvalidFormatException ("Unexpected end of file");
|
|
if (200 == m_info.Version)
|
|
UnpackV200();
|
|
else
|
|
UnpackV101();
|
|
}
|
|
|
|
void UnpackV101 ()
|
|
{
|
|
if (m_key != 0)
|
|
{
|
|
MrgOpener.Decrypt (m_input, 0, m_input.Length-1, m_key);
|
|
}
|
|
#if DEBUG
|
|
else // bruteforce key *in debug build only*
|
|
{
|
|
for (int key = 1; key < 256; ++key)
|
|
{
|
|
var copy = m_input.Clone() as byte[];
|
|
MrgOpener.Decrypt (copy, 0, copy.Length-1, (byte)key);
|
|
using (var input = new BinMemoryStream (copy))
|
|
using (var lzss = new MrgLzssReader (input, m_input.Length, Stride * m_height))
|
|
{
|
|
lzss.Unpack();
|
|
if (input.Length - input.Position <= 1)
|
|
{
|
|
m_output = lzss.Data;
|
|
m_key = (byte)key;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
using (var input = new BinMemoryStream (m_input))
|
|
using (var lzss = new MrgLzssReader (input, m_input.Length, Stride * m_height))
|
|
{
|
|
lzss.Unpack();
|
|
// data remaining within input stream indicates invalid encryption key
|
|
if (input.Length - input.Position > 1)
|
|
{
|
|
m_key = 0;
|
|
}
|
|
m_output = lzss.Data;
|
|
}
|
|
}
|
|
|
|
void UnpackV200 ()
|
|
{
|
|
m_output = new byte[m_pixels*3];
|
|
var reader = new MrgDecoder (m_input, 0, (uint)m_pixels);
|
|
do
|
|
{
|
|
reader.ResetKey (m_key);
|
|
try
|
|
{
|
|
for (int i = 0; i < 3; ++i)
|
|
{
|
|
reader.Unpack();
|
|
var plane = reader.Data;
|
|
int src = 0;
|
|
for (int j = ChannelOrder[i]; j < m_output.Length; j += 3)
|
|
{
|
|
m_output[j] = plane[src++];
|
|
}
|
|
}
|
|
// Trace.WriteLine (string.Format ("Found matching key {0:X2}", key), "[MCG]");
|
|
}
|
|
catch (InvalidFormatException)
|
|
{
|
|
m_key++;
|
|
continue;
|
|
}
|
|
Transform();
|
|
Settings.Default.MCGLastKey = m_key;
|
|
return;
|
|
}
|
|
while (m_key != Settings.Default.MCGLastKey);
|
|
throw new UnknownEncryptionScheme();
|
|
}
|
|
|
|
void Transform ()
|
|
{
|
|
int dst = 0;
|
|
for (int y = m_height-1; y > 0; --y) // @@1a
|
|
{
|
|
for (int x = Stride-3; x > 0; --x) // @@1b
|
|
{
|
|
int p0 = m_output[dst];
|
|
int py = m_output[dst+Stride] - p0;
|
|
int px = m_output[dst+3] - p0;
|
|
p0 = Math.Abs (px + py);
|
|
py = Math.Abs (py);
|
|
px = Math.Abs (px);
|
|
byte pv;
|
|
if (p0 >= px && py >= px)
|
|
pv = m_output[dst+Stride];
|
|
else if (p0 < py)
|
|
pv = m_output[dst];
|
|
else
|
|
pv = m_output[dst+3];
|
|
|
|
m_output[dst+Stride+3] += (byte)(pv + 0x80);
|
|
++dst;
|
|
}
|
|
dst += 3;
|
|
}
|
|
dst = 0;
|
|
for (uint i = 0; i < m_pixels; ++i)
|
|
{
|
|
sbyte b = -128;
|
|
sbyte r = -128;
|
|
b += (sbyte)m_output[dst];
|
|
r += (sbyte)m_output[dst+2];
|
|
int g = m_output[dst+1] - ((b + r) >> 2);
|
|
m_output[dst++] = (byte)(b + g);
|
|
m_output[dst++] = (byte)g;
|
|
m_output[dst++] = (byte)(r + g);
|
|
}
|
|
}
|
|
}
|
|
}
|