mirror of
https://github.com/crskycode/GARbro.git
synced 2024-12-29 14:24:13 +08:00
771 lines
27 KiB
C#
771 lines
27 KiB
C#
//! \file ImageRCT.cs
|
|
//! \date Fri Aug 01 11:36:31 2014
|
|
//! \brief RCT/RC8 image format implementation.
|
|
//
|
|
// Copyright (C) 2014-2016 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.IO;
|
|
using System.Text;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel.Composition;
|
|
using System.Windows;
|
|
using System.Windows.Media;
|
|
using System.Windows.Media.Imaging;
|
|
using GameRes.Formats.Properties;
|
|
using GameRes.Formats.Strings;
|
|
using GameRes.Utility;
|
|
|
|
namespace GameRes.Formats.Majiro
|
|
{
|
|
internal class RctMetaData : ImageMetaData
|
|
{
|
|
public int Version;
|
|
public bool IsEncrypted;
|
|
public uint DataOffset;
|
|
public uint DataSize;
|
|
public uint AddSize;
|
|
}
|
|
|
|
internal class RctOptions : ResourceOptions
|
|
{
|
|
public string Password;
|
|
}
|
|
|
|
[Serializable]
|
|
public class RctScheme : ResourceScheme
|
|
{
|
|
public Dictionary<string, string> KnownKeys;
|
|
}
|
|
|
|
[Export(typeof(ImageFormat))]
|
|
public class RctFormat : ImageFormat
|
|
{
|
|
public override string Tag { get { return "RCT"; } }
|
|
public override string Description { get { return "Majiro game engine RGB image format"; } }
|
|
public override uint Signature { get { return 0x9a925a98; } }
|
|
|
|
public bool OverlayFrames = true;
|
|
public bool ApplyMask = true;
|
|
|
|
public static Dictionary<string, string> KnownKeys = new Dictionary<string, string>();
|
|
|
|
public override ResourceScheme Scheme
|
|
{
|
|
get { return new RctScheme { KnownKeys = KnownKeys }; }
|
|
set { KnownKeys = ((RctScheme)value).KnownKeys; }
|
|
}
|
|
|
|
public override ImageMetaData ReadMetaData (Stream stream)
|
|
{
|
|
stream.Position = 4;
|
|
int id = stream.ReadByte();
|
|
if (0x54 != id)
|
|
return null;
|
|
int encryption = stream.ReadByte();
|
|
if (encryption != 0x43 && encryption != 0x53)
|
|
return null;
|
|
bool is_encrypted = 0x53 == encryption;
|
|
int version = stream.ReadByte();
|
|
if (0x30 != version)
|
|
return null;
|
|
version = stream.ReadByte() - 0x30;
|
|
if (version != 0 && version != 1)
|
|
return null;
|
|
|
|
using (var reader = new BinaryReader (stream, Encoding.ASCII, true))
|
|
{
|
|
uint width = reader.ReadUInt32();
|
|
uint height = reader.ReadUInt32();
|
|
uint data_size = reader.ReadUInt32();
|
|
uint additional_size = 0;
|
|
if (1 == version)
|
|
{
|
|
additional_size = reader.ReadUInt16();
|
|
}
|
|
if (width > 0x8000 || height > 0x8000)
|
|
return null;
|
|
|
|
return new RctMetaData
|
|
{
|
|
Width = width,
|
|
Height = height,
|
|
OffsetX = 0,
|
|
OffsetY = 0,
|
|
BPP = 24,
|
|
Version = version,
|
|
IsEncrypted = is_encrypted,
|
|
DataOffset = (uint)stream.Position,
|
|
DataSize = data_size,
|
|
AddSize = additional_size,
|
|
};
|
|
}
|
|
}
|
|
|
|
byte[] Key = null;
|
|
|
|
public override ImageData Read (Stream file, ImageMetaData info)
|
|
{
|
|
var meta = (RctMetaData)info;
|
|
|
|
byte[] base_image = null;
|
|
if (meta.FileName != null && meta.AddSize > 0 && OverlayFrames)
|
|
base_image = ReadBaseImage (file, meta);
|
|
|
|
var pixels = ReadPixelsData (file, meta);
|
|
if (base_image != null)
|
|
pixels = CombineImage (base_image, pixels);
|
|
|
|
if (ApplyMask)
|
|
{
|
|
var base_name = Path.GetFileNameWithoutExtension (meta.FileName);
|
|
var mask_name = base_name + "_.rc8";
|
|
mask_name = VFS.CombinePath (VFS.GetDirectoryName (meta.FileName), mask_name);
|
|
if (VFS.FileExists (mask_name))
|
|
{
|
|
try
|
|
{
|
|
return ApplyMaskToImage (meta, pixels, mask_name);
|
|
}
|
|
catch { /* ignore mask read errors */ }
|
|
}
|
|
}
|
|
return ImageData.Create (meta, PixelFormats.Bgr24, null, pixels, (int)meta.Width*3);
|
|
}
|
|
|
|
ImageData ApplyMaskToImage (RctMetaData info, byte[] image, string mask_name)
|
|
{
|
|
using (var mask_file = VFS.OpenSeekableStream (mask_name))
|
|
{
|
|
var format = FindFormat (mask_file, mask_name);
|
|
if (null == format || !(format.Item1 is Rc8Format)
|
|
|| info.Width != format.Item2.Width || info.Height != format.Item2.Height)
|
|
throw new InvalidFormatException();
|
|
|
|
using (var reader = new Rc8Format.Reader (mask_file, format.Item2))
|
|
{
|
|
reader.Unpack();
|
|
var palette = reader.Palette;
|
|
int dst_stride = (int)info.Width * 4;
|
|
var pixels = new byte[dst_stride * (int)info.Height];
|
|
var alpha = reader.Data;
|
|
int a_src = 0;
|
|
int src = 0;
|
|
for (int dst = 0; dst < pixels.Length; dst += 4)
|
|
{
|
|
pixels[dst ] = image[src++];
|
|
pixels[dst+1] = image[src++];
|
|
pixels[dst+2] = image[src++];
|
|
var color = palette[alpha[a_src++]];
|
|
pixels[dst+3] = (byte)~((color.B + color.G + color.R) / 3);
|
|
}
|
|
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, dst_stride);
|
|
}
|
|
}
|
|
}
|
|
|
|
byte[] CombineImage (byte[] base_image, byte[] overlay)
|
|
{
|
|
for (int i = 2; i < base_image.Length; i += 3)
|
|
{
|
|
if (0 == overlay[i-2] && 0 == overlay[i-1] && 0xff == overlay[i])
|
|
{
|
|
overlay[i-2] = base_image[i-2];
|
|
overlay[i-1] = base_image[i-1];
|
|
overlay[i] = base_image[i];
|
|
}
|
|
}
|
|
return overlay;
|
|
}
|
|
|
|
byte[] ReadPixelsData (Stream file, RctMetaData meta)
|
|
{
|
|
file.Position = meta.DataOffset + meta.AddSize;
|
|
if (meta.IsEncrypted)
|
|
file = OpenEncryptedStream (file, meta.DataSize);
|
|
try
|
|
{
|
|
using (var reader = new Reader (file, meta))
|
|
{
|
|
reader.Unpack();
|
|
return reader.Data;
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
if (meta.IsEncrypted)
|
|
Key = null; // probably incorrect encryption scheme caused exception, reset key
|
|
throw;
|
|
}
|
|
}
|
|
|
|
byte[] ReadBaseImage (Stream file, RctMetaData meta)
|
|
{
|
|
file.Position = meta.DataOffset;
|
|
byte[] name_bin = new byte[meta.AddSize];
|
|
if (name_bin.Length != file.Read (name_bin, 0, name_bin.Length))
|
|
throw new EndOfStreamException();
|
|
try
|
|
{
|
|
string name = Encodings.cp932.GetString (name_bin, 0, name_bin.Length-1);
|
|
string dir_name = VFS.GetDirectoryName (meta.FileName);
|
|
name = VFS.CombinePath (dir_name, name);
|
|
if (VFS.FileExists (name))
|
|
{
|
|
using (var base_file = VFS.OpenSeekableStream (name))
|
|
{
|
|
var base_info = ReadMetaData (base_file) as RctMetaData;
|
|
if (null != base_info && 0 == base_info.AddSize
|
|
&& meta.Width == base_info.Width && meta.Height == base_info.Height)
|
|
{
|
|
base_info.FileName = name;
|
|
return ReadPixelsData (base_file, base_info);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
catch { /* ignore baseline image read errors */ }
|
|
return null;
|
|
}
|
|
|
|
Stream OpenEncryptedStream (Stream file, uint data_size)
|
|
{
|
|
if (null == Key)
|
|
{
|
|
var password = QueryPassword();
|
|
if (string.IsNullOrEmpty (password))
|
|
throw new UnknownEncryptionScheme();
|
|
Key = InitDecryptionKey (password);
|
|
}
|
|
byte[] data = new byte[data_size];
|
|
if (data.Length != file.Read (data, 0, data.Length))
|
|
throw new EndOfStreamException();
|
|
|
|
for (int i = 0; i < data.Length; ++i)
|
|
{
|
|
data[i] ^= Key[i & 0x3FF];
|
|
}
|
|
return new MemoryStream (data);
|
|
}
|
|
|
|
private byte[] InitDecryptionKey (string password)
|
|
{
|
|
byte[] bin_pass = Encodings.cp932.GetBytes (password);
|
|
uint crc32 = Crc32.Compute (bin_pass, 0, bin_pass.Length);
|
|
byte[] key_table = new byte[0x400];
|
|
unsafe
|
|
{
|
|
fixed (byte* key_ptr = key_table)
|
|
{
|
|
uint* key32 = (uint*)key_ptr;
|
|
for (int i = 0; i < 0x100; ++i)
|
|
*key32++ = crc32 ^ Crc32.Table[(i + crc32) & 0xFF];
|
|
}
|
|
}
|
|
return key_table;
|
|
}
|
|
|
|
private string QueryPassword ()
|
|
{
|
|
var options = Query<RctOptions> (arcStrings.ArcImageEncrypted);
|
|
return options.Password;
|
|
}
|
|
|
|
public override ResourceOptions GetDefaultOptions ()
|
|
{
|
|
return new RctOptions { Password = Settings.Default.RCTPassword };
|
|
}
|
|
|
|
public override ResourceOptions GetOptions (object widget)
|
|
{
|
|
var w = widget as GUI.WidgetRCT;
|
|
if (null != w)
|
|
Settings.Default.RCTPassword = w.Password.Text;
|
|
return GetDefaultOptions();
|
|
}
|
|
|
|
public override object GetAccessWidget ()
|
|
{
|
|
return new GUI.WidgetRCT();
|
|
}
|
|
|
|
public override void Write (Stream file, ImageData image)
|
|
{
|
|
using (var writer = new Writer (file))
|
|
writer.Pack (image.Bitmap);
|
|
}
|
|
|
|
internal class Writer : IDisposable
|
|
{
|
|
BinaryWriter m_out;
|
|
uint[] m_input;
|
|
int m_width;
|
|
int m_height;
|
|
|
|
int[] m_shift_table = new int[32];
|
|
|
|
const int MaxThunkSize = 0xffff + 0x7f;
|
|
const int MaxMatchSize = 0xffff;
|
|
|
|
struct ChunkPosition
|
|
{
|
|
public ushort Offset;
|
|
public ushort Length;
|
|
}
|
|
|
|
public Writer (Stream output)
|
|
{
|
|
m_out = new BinaryWriter (output, Encoding.ASCII, true);
|
|
}
|
|
|
|
void PrepareInput (BitmapSource bitmap)
|
|
{
|
|
m_width = bitmap.PixelWidth;
|
|
m_height = bitmap.PixelHeight;
|
|
int pixels = m_width*m_height;
|
|
m_input = new uint[pixels];
|
|
if (bitmap.Format != PixelFormats.Bgr32)
|
|
{
|
|
var converted_bitmap = new FormatConvertedBitmap();
|
|
converted_bitmap.BeginInit();
|
|
converted_bitmap.Source = bitmap;
|
|
converted_bitmap.DestinationFormat = PixelFormats.Bgr32;
|
|
converted_bitmap.EndInit();
|
|
bitmap = converted_bitmap;
|
|
}
|
|
unsafe
|
|
{
|
|
fixed (uint* buffer = m_input)
|
|
{
|
|
bitmap.CopyPixels (Int32Rect.Empty, (IntPtr)buffer, pixels*4, m_width*4);
|
|
}
|
|
}
|
|
InitShiftTable (m_width);
|
|
}
|
|
|
|
void InitShiftTable (int width)
|
|
{
|
|
for (int i = 0; i < 32; ++i)
|
|
{
|
|
int shift = Reader.ShiftTable[i];
|
|
int shift_row = shift & 0x0f;
|
|
shift >>= 4;
|
|
shift_row *= width;
|
|
shift -= shift_row;
|
|
m_shift_table[i] = shift;
|
|
}
|
|
}
|
|
|
|
List<byte> m_buffer = new List<byte>();
|
|
int m_buffer_size;
|
|
|
|
public void Pack (BitmapSource bitmap)
|
|
{
|
|
PrepareInput (bitmap);
|
|
long data_offset = 0x14;
|
|
m_out.BaseStream.Position = data_offset;
|
|
uint pixel = m_input[0];
|
|
m_out.Write ((byte)pixel);
|
|
m_out.Write ((byte)(pixel >> 8));
|
|
m_out.Write ((byte)(pixel >> 16));
|
|
|
|
m_buffer.Clear();
|
|
m_buffer_size = 0;
|
|
int last = m_input.Length;
|
|
int current = 1;
|
|
while (current != last)
|
|
{
|
|
var chunk_pos = FindLongest (current, last);
|
|
if (chunk_pos.Length > 0)
|
|
{
|
|
Flush();
|
|
WritePos (chunk_pos);
|
|
current += chunk_pos.Length;
|
|
}
|
|
else
|
|
{
|
|
WritePixel (m_input[current++]);
|
|
}
|
|
}
|
|
Flush();
|
|
var data_size = m_out.BaseStream.Position - data_offset;
|
|
m_out.BaseStream.Position = 0;
|
|
WriteHeader ((uint)data_size);
|
|
}
|
|
|
|
void WriteHeader (uint data_size)
|
|
{
|
|
m_out.Write (0x9a925a98u);
|
|
m_out.Write (0x30304354u);
|
|
m_out.Write (m_width);
|
|
m_out.Write (m_height);
|
|
m_out.Write (data_size);
|
|
}
|
|
|
|
void WritePixel (uint pixel)
|
|
{
|
|
if (MaxThunkSize == m_buffer_size)
|
|
Flush();
|
|
m_buffer.Add ((byte)pixel);
|
|
m_buffer.Add ((byte)(pixel >> 8));
|
|
m_buffer.Add ((byte)(pixel >> 16));
|
|
++m_buffer_size;
|
|
}
|
|
|
|
void Flush ()
|
|
{
|
|
if (0 != m_buffer.Count)
|
|
{
|
|
if (m_buffer_size > 0x7f)
|
|
{
|
|
m_out.Write ((byte)0x7f);
|
|
m_out.Write ((ushort)(m_buffer_size-0x80));
|
|
}
|
|
else
|
|
m_out.Write ((byte)(m_buffer_size-1));
|
|
foreach (var b in m_buffer)
|
|
m_out.Write (b);
|
|
m_buffer.Clear();
|
|
m_buffer_size = 0;
|
|
}
|
|
}
|
|
|
|
ChunkPosition FindLongest (int buf_begin, int buf_end)
|
|
{
|
|
buf_end = Math.Min (buf_begin + MaxMatchSize, buf_end);
|
|
ChunkPosition pos = new ChunkPosition { Offset = 0, Length = 0 };
|
|
for (int i = 0; i < 32; ++i)
|
|
{
|
|
int offset = buf_begin + m_shift_table[i];
|
|
if (offset < 0)
|
|
continue;
|
|
if (m_input[offset] != m_input[buf_begin])
|
|
continue;
|
|
var last = Mismatch (buf_begin+1, buf_end, offset+1);
|
|
int weight = last - offset;
|
|
if (weight > pos.Length)
|
|
{
|
|
pos.Offset = (ushort)i;
|
|
pos.Length = (ushort)weight;
|
|
}
|
|
}
|
|
return pos;
|
|
}
|
|
|
|
int Mismatch (int first1, int last1, int first2)
|
|
{
|
|
while (first1 != last1 && m_input[first1] == m_input[first2])
|
|
{
|
|
++first1;
|
|
++first2;
|
|
}
|
|
return first2;
|
|
}
|
|
|
|
void WritePos (ChunkPosition pos)
|
|
{
|
|
int code = (pos.Offset << 2) | 0x80;
|
|
if (pos.Length > 3)
|
|
code |= 3;
|
|
else
|
|
code |= pos.Length - 1;
|
|
m_out.Write ((byte)code);
|
|
if (pos.Length > 3)
|
|
m_out.Write ((ushort)(pos.Length - 4));
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
protected virtual void Dispose (bool disposing)
|
|
{
|
|
if (!disposed)
|
|
{
|
|
if (disposing)
|
|
{
|
|
m_out.Dispose();
|
|
}
|
|
disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
internal class Reader : IDisposable
|
|
{
|
|
private BinaryReader m_input;
|
|
private uint m_width;
|
|
private byte[] m_data;
|
|
|
|
public byte[] Data { get { return m_data; } }
|
|
|
|
public Reader (Stream file, RctMetaData info)
|
|
{
|
|
m_width = info.Width;
|
|
m_data = new byte[m_width * info.Height * 3];
|
|
m_input = new BinaryReader (file, Encoding.ASCII, true);
|
|
}
|
|
|
|
internal static readonly sbyte[] ShiftTable = new sbyte[] {
|
|
-16, -32, -48, -64, -80, -96,
|
|
49, 33, 17, 1, -15, -31, -47,
|
|
50, 34, 18, 2, -14, -30, -46,
|
|
51, 35, 19, 3, -13, -29, -45,
|
|
36, 20, 4, -12, -28,
|
|
};
|
|
|
|
public void Unpack ()
|
|
{
|
|
int pixels_remaining = m_data.Length;
|
|
int data_pos = 0;
|
|
int eax = 0;
|
|
while (pixels_remaining > 0)
|
|
{
|
|
int count = eax*3 + 3;
|
|
if (count > pixels_remaining)
|
|
throw new InvalidFormatException();
|
|
pixels_remaining -= count;
|
|
if (count != m_input.Read (m_data, data_pos, count))
|
|
throw new InvalidFormatException();
|
|
data_pos += count;
|
|
|
|
while (pixels_remaining > 0)
|
|
{
|
|
eax = m_input.ReadByte();
|
|
if (0 == (eax & 0x80))
|
|
{
|
|
if (0x7f == eax)
|
|
eax += m_input.ReadUInt16();
|
|
break;
|
|
}
|
|
int shift_index = eax >> 2;
|
|
eax &= 3;
|
|
if (3 == eax)
|
|
eax += m_input.ReadUInt16();
|
|
|
|
count = eax*3 + 3;
|
|
if (pixels_remaining < count)
|
|
throw new InvalidFormatException();
|
|
pixels_remaining -= count;
|
|
int shift = ShiftTable[shift_index & 0x1f];
|
|
int shift_row = shift & 0x0f;
|
|
shift >>= 4;
|
|
shift_row *= (int)m_width;
|
|
shift -= shift_row;
|
|
shift *= 3;
|
|
if (shift >= 0 || data_pos+shift < 0)
|
|
throw new InvalidFormatException();
|
|
Binary.CopyOverlapped (m_data, data_pos+shift, data_pos, count);
|
|
data_pos += count;
|
|
}
|
|
}
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
protected virtual void Dispose (bool disposing)
|
|
{
|
|
if (!disposed)
|
|
{
|
|
if (disposing)
|
|
m_input.Dispose();
|
|
m_input = null;
|
|
m_data = null;
|
|
disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
}
|
|
|
|
[Export(typeof(ImageFormat))]
|
|
public class Rc8Format : ImageFormat
|
|
{
|
|
public override string Tag { get { return "RC8"; } }
|
|
public override string Description { get { return "Majiro game engine indexed image format"; } }
|
|
public override uint Signature { get { return 0x9a925a98; } }
|
|
|
|
public override ImageMetaData ReadMetaData (Stream stream)
|
|
{
|
|
stream.Position = 4;
|
|
int id = stream.ReadByte();
|
|
if (0x38 != id)
|
|
return null;
|
|
id = stream.ReadByte();
|
|
if (0x5f != id)
|
|
return null;
|
|
int version = stream.ReadByte();
|
|
if (0x30 != version)
|
|
return null;
|
|
version = stream.ReadByte() - 0x30;
|
|
if (version != 0)
|
|
return null;
|
|
|
|
using (var reader = new BinaryReader (stream, Encoding.ASCII, true))
|
|
{
|
|
uint width = reader.ReadUInt32();
|
|
uint height = reader.ReadUInt32();
|
|
if (width > 0x8000 || height > 0x8000)
|
|
return null;
|
|
return new ImageMetaData
|
|
{
|
|
Width = width,
|
|
Height = height,
|
|
OffsetX = 0,
|
|
OffsetY = 0,
|
|
BPP = 8,
|
|
};
|
|
}
|
|
}
|
|
|
|
public override ImageData Read (Stream file, ImageMetaData info)
|
|
{
|
|
using (var reader = new Reader (file, info))
|
|
{
|
|
reader.Unpack();
|
|
var palette = new BitmapPalette (reader.Palette);
|
|
return ImageData.Create (info, PixelFormats.Indexed8, palette, reader.Data, (int)info.Width);
|
|
}
|
|
}
|
|
|
|
public override void Write (Stream file, ImageData image)
|
|
{
|
|
throw new NotImplementedException ("Rc8Format.Write is not implemented.");
|
|
}
|
|
|
|
internal class Reader : IDisposable
|
|
{
|
|
private BinaryReader m_input;
|
|
private uint m_width;
|
|
private Color[] m_palette;
|
|
private byte[] m_data;
|
|
|
|
public Color[] Palette { get { return m_palette; } }
|
|
public byte[] Data { get { return m_data; } }
|
|
|
|
public Reader (Stream file, ImageMetaData info)
|
|
{
|
|
m_width = info.Width;
|
|
file.Position = 0x14;
|
|
var palette_data = new byte[0x300];
|
|
if (palette_data.Length != file.Read (palette_data, 0, palette_data.Length))
|
|
throw new InvalidFormatException();
|
|
m_palette = new Color[0x100];
|
|
for (int i = 0; i < 0x100; ++i)
|
|
{
|
|
m_palette[i] = Color.FromRgb (palette_data[i*3], palette_data[i*3+1], palette_data[i*3+2]);
|
|
}
|
|
m_data = new byte[m_width * info.Height];
|
|
m_input = new BinaryReader (file, Encoding.ASCII, true);
|
|
}
|
|
|
|
private static readonly sbyte[] ShiftTable = new sbyte[] {
|
|
-16, -32, -48, -64,
|
|
49, 33, 17, 1, -15, -31, -47,
|
|
34, 18, 2, -14, -30,
|
|
};
|
|
|
|
public void Unpack ()
|
|
{
|
|
int data_pos = 0;
|
|
int eax = 0;
|
|
int pixels_remaining = m_data.Length;
|
|
while (pixels_remaining > 0)
|
|
{
|
|
int count = eax + 1;
|
|
if (count > pixels_remaining)
|
|
throw new InvalidFormatException();
|
|
pixels_remaining -= count;
|
|
|
|
if (count != m_input.Read (m_data, data_pos, count))
|
|
throw new InvalidFormatException();
|
|
data_pos += count;
|
|
|
|
while (pixels_remaining > 0)
|
|
{
|
|
eax = m_input.ReadByte();
|
|
if (0 == (eax & 0x80))
|
|
{
|
|
if (0x7f == eax)
|
|
eax += m_input.ReadUInt16();
|
|
break;
|
|
}
|
|
int shift_index = eax >> 3;
|
|
eax &= 7;
|
|
if (7 == eax)
|
|
eax += m_input.ReadUInt16();
|
|
|
|
count = eax + 3;
|
|
if (pixels_remaining < count)
|
|
throw new InvalidFormatException();
|
|
pixels_remaining -= count;
|
|
int shift = ShiftTable[shift_index & 0x0f];
|
|
int shift_row = shift & 0x0f;
|
|
shift >>= 4;
|
|
shift_row *= (int)m_width;
|
|
shift -= shift_row;
|
|
if (shift >= 0 || data_pos+shift < 0)
|
|
throw new InvalidFormatException();
|
|
Binary.CopyOverlapped (m_data, data_pos+shift, data_pos, count);
|
|
data_pos += count;
|
|
}
|
|
}
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool disposed = false;
|
|
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
protected virtual void Dispose (bool disposing)
|
|
{
|
|
if (!disposed)
|
|
{
|
|
if (disposing)
|
|
m_input.Dispose();
|
|
m_input = null;
|
|
m_data = null;
|
|
disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
}
|
|
}
|