GARbro-mirror/ArcFormats/ImageACD.cs
morkt d312da7de5 implemented F&C resource formats.
*.mrg archives
*.mcg and *.acd images
2015-07-14 05:15:26 +04:00

159 lines
5.5 KiB
C#

//! \file ImageACD.cs
//! \date Mon Jul 13 16:13:36 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Utility;
namespace GameRes.Formats.FC01
{
internal class AcdMetaData : ImageMetaData
{
public int DataOffset;
public int PackedSize;
public int UnpackedSize;
}
[Export(typeof(ImageFormat))]
public class AcdFormat : ImageFormat
{
public override string Tag { get { return "ACD"; } }
public override string Description { get { return "F&C Co. image format"; } }
public override uint Signature { get { return 0x20444341; } } // 'ACD'
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x1c];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
int header_size = LittleEndian.ToInt32 (header, 8);
if (!Binary.AsciiEqual (header, 4, "1.00") || header_size < 0x1c)
throw new NotSupportedException ("Not supported ACD image version");
int packed_size = LittleEndian.ToInt32 (header, 0x0C);
int unpacked_size = LittleEndian.ToInt32 (header, 0x10);
return new AcdMetaData
{
Width = LittleEndian.ToUInt32 (header, 0x14),
Height = LittleEndian.ToUInt32 (header, 0x18),
BPP = 24,
DataOffset = header_size,
PackedSize = packed_size,
UnpackedSize = unpacked_size,
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as AcdMetaData;
if (null == meta)
throw new ArgumentException ("AcdFormat.Read should be supplied with AcdMetaData", "info");
stream.Position = meta.DataOffset;
using (var reader = new MrgLzssReader (stream, meta.PackedSize, meta.UnpackedSize))
{
reader.Unpack();
var decoder = new AcdDecoder (reader.Data, meta);
decoder.Unpack();
return ImageData.Create (info, PixelFormats.Gray8, null, decoder.Data);
}
throw new InvalidFormatException();
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("AcdFormat.Write not implemented");
}
}
internal class AcdDecoder
{
byte[] m_input;
byte[] m_output;
public byte[] Data { get { return m_output; } }
public AcdDecoder (byte[] input, AcdMetaData info)
{
m_input = input;
m_output = new byte[info.Width*info.Height];
}
int m_src;
int m_bits;
public byte[] Unpack ()
{
m_src = 0; // @@SB
m_bits = 0;
for (int dst = 0; dst < m_output.Length; dst++)
{
int pixel = 0;
if (0 != GetBit())
{
--pixel;
if (0 == GetBit())
{
pixel += 3;
int bit;
do
{
bit = GetBit();
pixel += pixel + bit;
bit = (pixel >> 8) & 1;
pixel &= 0xff;
}
while (0 == bit);
if (0 != pixel)
{
++pixel;
pixel *= 0x28CCCCD;
pixel = (int)((uint)pixel >> 24);
}
}
}
m_output[dst] = (byte)pixel;
}
return m_output;
}
int GetBit ()
{
int bit = m_bits >> 7;
m_bits = (m_bits << 1) & 0xff;
if (0 == m_bits)
{
if (m_src >= m_input.Length)
throw new InvalidFormatException();
m_bits = m_input[m_src++];
bit = m_bits >> 7;
m_bits = (m_bits << 1) & 0xff | 1;
}
return bit;
}
}
}