GARbro-mirror/ArcFormats/Marble/ImagePRS.cs

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//! \file ImagePRS.cs
//! \date Sat Mar 28 00:15:43 2015
//! \brief Marble engine 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.Text;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Marble
{
internal class PrsMetaData : ImageMetaData
{
public byte Flag;
public uint PackedSize;
}
[Export(typeof(ImageFormat))]
public class PrsFormat : ImageFormat
{
public override string Tag { get { return "PRS"; } }
public override string Description { get { return "Marble engine image format"; } }
public override uint Signature { get { return 0; } }
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("PrsFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x10];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
if (header[0] != 'Y' || header[1] != 'B' || header[3] != 3)
return null;
return new PrsMetaData
{
Width = LittleEndian.ToUInt16 (header, 12),
Height = LittleEndian.ToUInt16 (header, 14),
BPP = 24,
Flag = header[2],
PackedSize = LittleEndian.ToUInt32 (header, 4),
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as PrsMetaData;
if (null == meta)
throw new ArgumentException ("PrsFormat.Read should be supplied with PrsMetaData", "info");
stream.Position = 0x10;
using (var reader = new Reader (stream, meta))
{
reader.Unpack();
byte[] pixels = reader.Data;
var bitmap = BitmapSource.Create ((int)meta.Width, (int)meta.Height, 96, 96,
PixelFormats.Bgr24, null, pixels, (int)meta.Width*3);
bitmap.Freeze();
return new ImageData (bitmap, meta);
}
}
internal class Reader : IDisposable
{
BinaryReader m_input;
byte[] m_output;
uint m_size;
byte m_flag;
public byte[] Data { get { return m_output; } }
public Reader (Stream file, PrsMetaData info)
{
m_input = new BinaryReader (file, Encoding.ASCII, true);
m_output = new byte[info.Width*info.Height*3];
m_size = info.PackedSize;
m_flag = info.Flag;
}
static readonly int[] LengthTable = InitLengthTable();
private static int[] InitLengthTable ()
{
var length_table = new int[256];
for (int i = 0; i < 0xfe; ++i)
length_table[i] = i + 3;
length_table[0xfe] = 0x400;
length_table[0xff] = 0x1000;
return length_table;
}
public void Unpack ()
{
int dst = 0;
int remaining = (int)m_size;
int bit = 0;
int ctl = 0;
while (remaining > 0 && dst < m_output.Length)
{
bit >>= 1;
if (0 == bit)
{
ctl = m_input.ReadByte();
--remaining;
bit = 0x80;
}
if (0 == (ctl & bit))
{
m_output[dst++] = m_input.ReadByte();
--remaining;
continue;
}
int b = m_input.ReadByte();
--remaining;
int length = 0;
int shift = 0;
if (0 != (b & 0x80))
{
if (remaining <= 0)
break;
shift = m_input.ReadByte();
--remaining;
shift |= (b & 0x3f) << 8;
if (0 != (b & 0x40))
{
if (remaining <= 0)
break;
int offset = m_input.ReadByte();
--remaining;
length = LengthTable[offset];
}
else
{
length = (shift & 0xf) + 3;
shift >>= 4;
}
}
else
{
length = b >> 2;
b &= 3;
if (3 == b)
{
length += 9;
int read = m_input.Read (m_output, dst, length);
if (read < length)
break;
remaining -= length;
dst += length;
continue;
}
shift = length;
length = b + 2;
}
++shift;
if (dst < shift)
throw new InvalidFormatException ("Invalid offset value");
Binary.CopyOverlapped (m_output, dst-shift, dst, length);
dst += length;
}
if (m_flag != 0)
{
for (int i = 3; i < m_output.Length; ++i)
m_output[i] += m_output[i-3];
}
}
#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();
}
disposed = true;
}
}
#endregion
}
}
}