GARbro-mirror/ArcFormats/Abogado/ImageKG.cs

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//! \file ImageKG.cs
//! \date Wed Oct 19 15:51:18 2016
//! \brief AbogadoPowers 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;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Abogado
{
internal class KgMetaData : ImageMetaData
{
public int PaletteOffset;
public int DataOffset;
public int AlphaOffset;
}
[Export(typeof(ImageFormat))]
public class KgFormat : ImageFormat
{
public override string Tag { get { return "KG/ABOGADO"; } }
public override string Description { get { return "AbogadoPowers image format"; } }
public override uint Signature { get { return 0; } }
public KgFormat ()
{
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Signatures = new uint[] { 0x0202474B, 0x0102474B, 0x0200474B, 0x0100474B };
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}
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x30);
return new KgMetaData
{
Width = header.ToUInt16 (4),
Height = header.ToUInt16 (6),
BPP = header[3] == 2 ? 24 : 8,
PaletteOffset = header.ToInt32 (0xC),
DataOffset = header.ToInt32 (0x10),
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AlphaOffset = header[2] == 2 ? header.ToInt32 (0x2C) : 0,
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};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
using (var reader = new KgReader (file, (KgMetaData)info))
{
reader.Unpack();
return ImageData.CreateFlipped (info, reader.Format, reader.Palette, reader.Pixels, reader.Stride);
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("KgFormat.Write not implemented");
}
}
internal sealed class KgReader : IDisposable
{
IBinaryStream m_input;
MsbBitStream m_bits;
KgMetaData m_info;
byte[] m_output;
int m_pixel_size;
int m_stride;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Pixels { get { return m_output; } }
public int Stride { get { return m_stride; } }
public KgReader (IBinaryStream input, KgMetaData info)
{
m_input = input;
m_bits = new MsbBitStream (input.AsStream, true);
m_info = info;
m_pixel_size = m_info.BPP / 8;
m_stride = m_pixel_size * (int)m_info.Width;
m_output = new byte[m_stride * (int)m_info.Height];
if (0 != m_info.AlphaOffset)
Format = PixelFormats.Bgra32;
else if (24 == m_info.BPP)
Format = PixelFormats.Bgr24;
else
Format = PixelFormats.Indexed8;
}
public void Unpack ()
{
if (8 == m_info.BPP)
{
m_input.Position = m_info.PaletteOffset;
Palette = ImageFormat.ReadPalette (m_input.AsStream);
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}
m_bits.Input.Position = m_info.DataOffset;
ResetDict();
UnpackChannel (0);
if (m_pixel_size > 1)
{
UnpackChannel (1);
UnpackChannel (2);
}
if (m_info.AlphaOffset != 0)
{
ConvertToBgr32();
try
{
m_bits.Input.Position = m_info.AlphaOffset;
m_bits.Reset();
ResetDict();
UnpackChannel (3);
}
catch
{
Format = PixelFormats.Bgr32;
}
}
}
byte[] m_dict = new byte[0x800];
void ResetDict ()
{
for (int i = 0; i < 0x800; ++i)
m_dict[i] = (byte)(i & 7);
}
void ConvertToBgr32 ()
{
m_stride = (int)m_info.Width * 4;
var pixels = new byte[m_stride * (int)m_info.Height];
int dst = 0;
if (1 == m_pixel_size)
{
var colors = Palette.Colors;
for (int src = 0; src < m_output.Length; ++src)
{
var pixel = colors[m_output[src]];
pixels[dst] = pixel.B;
pixels[dst+1] = pixel.G;
pixels[dst+2] = pixel.R;
dst += 4;
}
}
else
{
for (int src = 0; src < m_output.Length; src += m_pixel_size)
{
pixels[dst] = m_output[src];
pixels[dst+1] = m_output[src+1];
pixels[dst+2] = m_output[src+2];
dst += 4;
}
}
m_output = pixels;
m_pixel_size = 4;
}
void UnpackChannel (int dst)
{
m_output[dst] = (byte)m_bits.GetBits (8);
dst += m_pixel_size;
m_output[dst] = (byte)m_bits.GetBits (8);
dst += m_pixel_size;
while (dst < m_output.Length)
{
int ctl = m_bits.GetBits (1);
if (-1 == ctl)
throw new EndOfStreamException();
if (0 == ctl)
{
byte b = GetPixel (dst);
m_output[dst] = b;
UpdateDict (b, m_output[dst - m_pixel_size]);
dst += m_pixel_size;
continue;
}
if (0 != m_bits.GetBits (1))
ctl = m_bits.GetBits (2);
else
ctl = 4;
int offset;
switch (ctl)
{
case 0:
offset = m_stride;
break;
case 1:
offset = m_stride - m_pixel_size;
break;
case 2:
offset = m_stride + m_pixel_size;
break;
case 3:
offset = 2 * m_pixel_size;
break;
default:
offset = m_pixel_size;
break;
}
int count = GetCount();
int src = dst - offset;
for (int i = 0; i < count; ++i)
{
m_output[dst] = m_output[src];
dst += m_pixel_size;
src += m_pixel_size;
}
}
}
byte GetPixel (int dst)
{
if (1 == m_bits.GetBits (1))
{
return (byte)m_bits.GetBits (8);
}
else
{
int n = 8 * m_output[dst - m_pixel_size];
return m_dict[n + m_bits.GetBits (3)];
}
}
void UpdateDict (byte b, byte prev)
{
int s = 8 * prev;
int i;
for (i = 0; i < 8; ++i)
{
if (m_dict[s + i] == b)
break;
}
if (i != 0)
{
if (8 == i)
i = 7;
Buffer.BlockCopy (m_dict, s, m_dict, s+1, i);
m_dict[s] = b;
}
}
int GetCount ()
{
int count = m_bits.GetBits (2);
if (0 == count)
{
count = m_bits.GetBits (4);
if (0 != count)
{
count += 3;
}
else
{
count = m_bits.GetBits (8);
if (0 == count)
{
count = m_bits.GetBits (16);
if (0 == count)
{
count = m_bits.GetBits (16) << 16;
count |= m_bits.GetBits (16);
}
}
}
}
return count;
}
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_bits.Dispose();
_disposed = true;
}
}
}
}