GARbro-mirror/ArcFormats/Cadath/ImageKGF.cs

216 lines
7.4 KiB
C#

//! \file ImageKGF.cs
//! \date Thu Dec 22 16:47:04 2016
//! \brief Cadath image format.
//
// Copyright (C) 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.Cadath
{
internal class KgfMetaData : ImageMetaData
{
public int Mode;
}
[Export(typeof(ImageFormat))]
public class KgfFormat : ImageFormat
{
public override string Tag { get { return "KGF"; } }
public override string Description { get { return "Cadath image format"; } }
public override uint Signature { get { return 0x46474B; } } // 'KGF'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x1C);
return new KgfMetaData
{
Width = header.ToUInt32 (4),
Height = header.ToUInt32 (8),
BPP = header.ToInt32 (0xC),
Mode = header.ToInt32 (0x10),
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var decoder = new KgfDecoder (file, (KgfMetaData)info);
decoder.Unpack();
return ImageData.Create (info, decoder.Format, null, decoder.Data);
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("KgfFormat.Write not implemented");
}
}
internal class KgfDecoder
{
IBinaryStream m_input;
byte[] m_output;
int m_width;
int m_height;
int m_pixel_size;
int m_mode;
public byte[] Data { get { return m_output; } }
public PixelFormat Format { get; private set; }
public KgfDecoder (IBinaryStream input, KgfMetaData info)
{
m_input = input;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_mode = info.Mode;
if (32 == info.BPP)
Format = PixelFormats.Bgra32;
else if (24 == info.BPP)
Format = PixelFormats.Bgr24;
else
throw new InvalidFormatException();
m_pixel_size = info.BPP / 8;
m_output = new byte[m_width * m_height * m_pixel_size];
}
public void Unpack ()
{
switch (m_mode)
{
case 5: UnpackV5(); break;
case 0:
case 1:
case 2: throw new NotImplementedException (string.Format ("KGF image type {0} not implemented", m_mode));
default: throw new InvalidFormatException();
}
}
void UnpackV5 ()
{
m_input.Position = 0x24;
int packed_size = m_input.ReadInt32();
var data = Decompress (packed_size);
var line = new byte[m_width];
int channel_size = m_width * m_height;
int src = 0;
for (int i = 0; i < m_pixel_size; ++i)
{
for (int j = 0; j < line.Length; ++j)
line[j] = 0;
int dst = i;
for (int j = 0; j < channel_size; ++j)
{
int pos = j % m_width;
byte b = line[pos];
b ^= data[src++];
m_output[dst] = b;
line[pos] = b;
dst += m_pixel_size;
}
}
}
byte[] Decompress (int input_size)
{
var output = new byte[m_output.Length];
var buf0 = new InputBuffer (0x200);
var buf1 = new InputBuffer (0x200 >> 3);
var bits_buf = new byte[buf1.Length + 1];
int dst = 0;
while (dst < output.Length)
{
if (0 == buf1.ReadFrom (m_input))
throw new InvalidFormatException();
int output_chunk_size;
if (buf1.Decode (bits_buf, 0, buf1.Length, m_input, out output_chunk_size))
throw new InvalidFormatException();
buf0.ReadFrom (bits_buf);
if (buf0.Decode (output, dst, output.Length - dst, m_input, out output_chunk_size))
break;
dst += output_chunk_size;
}
return output;
}
class InputBuffer
{
byte m_last_byte;
byte[] m_ctl_bits;
byte[] m_data;
public int Length { get; private set; }
public int ByteLength { get { return Length >> 3; } }
public InputBuffer (int length)
{
Length = length;
m_last_byte = 0;
m_ctl_bits = new byte[(length >> 3) + 1];
m_data = new byte[length + 1];
}
public int ReadFrom (IBinaryStream input)
{
return input.Read (m_ctl_bits, 0, ByteLength);
}
public int ReadFrom (byte[] input)
{
Buffer.BlockCopy (input, 0, m_ctl_bits, 0, ByteLength);
return ByteLength;
}
public bool Decode (byte[] output, int dst_pos, int output_size, IBinaryStream input, out int output_chunk_size)
{
for (int i = 0; i < Length; ++i)
{
if (0 != (m_ctl_bits[i >> 3] & 1))
{
m_data[i] = 0;
}
else
{
int next = input.ReadByte();
if (-1 == next)
break;
m_data[i] = (byte)next;
}
m_ctl_bits[i >> 3] >>= 1;
}
m_data[0] ^= m_last_byte;
for (int i = 0; i < Length; ++i)
{
m_data[i+1] ^= m_data[i];
}
m_last_byte = m_data[Length - 1];
output_chunk_size = Math.Min (Length, output_size);
Buffer.BlockCopy (m_data, 0, output, dst_pos, output_chunk_size);
return Length > output_size;
}
}
}
}