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GARbro-mirror/ArcFormats/TopCat/ImageSPD.cs

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//! \file ImageSPD.cs
//! \date Thu Oct 08 16:25:55 2015
//! \brief TopCat compressed image.
//
// 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 GameRes.Utility;
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace GameRes.Formats.TopCat
{
internal class SpdMetaData : ImageMetaData
{
public Compression Method;
public uint UnpackedSize;
}
internal enum Compression
{
LzRle = 0,
Lz = 1,
LzRleAlpha = 2,
LzRle2 = 0x100,
Spdc = 0x101,
LzRleAlpha2 = 0x102,
Jpeg = 0x103,
}
[Export(typeof(ImageFormat))]
public class SpdFormat : ImageFormat
{
public override string Tag { get { return "SPD"; } }
public override string Description { get { return "TopCat compressed image format"; } }
public override uint Signature { get { return 0x43445053; } } // 'SPDC'
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x14];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
unsafe
{
fixed (byte* raw = header)
{
uint* dw = (uint*)raw;
dw[3] -= (dw[4] >> 2) & 0xF731;
dw[2] -= (dw[4] << 2) & 0x137F;
dw[1] -= (dw[4] << 4) & 0xFFFF;
return new SpdMetaData
{
Width = dw[2],
Height = dw[3],
BPP = (int)(dw[1] >> 16),
Method = (Compression)(dw[1] & 0xFFFF),
UnpackedSize = dw[4],
};
}
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as SpdMetaData;
if (null == meta)
throw new ArgumentException ("SpdFormat.Read should be supplied with SpdMetaData", "info");
if (Compression.Jpeg == meta.Method)
return ReadJpeg (stream, meta);
using (var reader = new SpdReader (stream, meta))
{
reader.Unpack();
return ImageData.Create (info, reader.Format, null, reader.Data);
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("SpdFormat.Write not implemented");
}
private ImageData ReadJpeg (Stream file, SpdMetaData info)
{
file.Position = 0x18;
var header = new byte[0x3C];
if (header.Length != file.Read (header, 0, header.Length))
throw new EndOfStreamException();
unsafe
{
fixed (byte* raw = header)
{
uint* dw = (uint*)raw;
for (int i = 0; i < 0xF; ++i)
dw[i] += 0xA8961EF1;
}
}
using (var rest = new StreamRegion (file, file.Position, file.Length-file.Position, true))
using (var jpeg = new PrefixStream (header, rest))
{
var decoder = new JpegBitmapDecoder (jpeg,
BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
var frame = decoder.Frames[0];
frame.Freeze();
return new ImageData (frame, info);
}
}
}
internal sealed class SpdReader : IDisposable
{
Stream m_input;
byte[] m_output;
SpdMetaData m_info;
public PixelFormat Format { get; private set; }
public byte[] Data { get { return m_output; } }
public SpdReader (Stream input, SpdMetaData info)
{
m_input = input;
m_output = new byte[info.UnpackedSize];
m_info = info;
if (24 == info.BPP)
Format = PixelFormats.Bgr24;
else if (32 == info.BPP)
Format = PixelFormats.Bgra32;
else
throw new NotSupportedException ("Not supported SPD image bitdepth");
}
public void Unpack ()
{
m_input.Position = 0x14;
switch (m_info.Method)
{
case Compression.Spdc:
UnpackSpdc();
break;
case Compression.LzRle:
case Compression.LzRle2:
case Compression.LzRleAlpha:
case Compression.LzRleAlpha2:
{
UnpackLz();
var rgb = new byte[m_info.Height * m_info.Width * 4];
if (Compression.LzRle == m_info.Method || Compression.LzRle2 == m_info.Method)
UnpackRle (rgb);
else
UnpackRleAlpha (rgb);
m_output = rgb;
Format = PixelFormats.Bgra32;
break;
}
default:
throw new NotImplementedException ("SPD compression method not implemented");
}
}
void UnpackLz ()
{
int dst = 0;
while (dst < m_output.Length)
{
int ctl = m_input.ReadByte();
if (-1 == ctl)
break;
for (int bit = 1; bit != 0x100 && dst < m_output.Length; bit <<= 1)
{
if (0 != (ctl & bit))
{
int b = m_input.ReadByte();
if (-1 == b)
return;
m_output[dst++] = (byte)b;
}
else
{
int lo = m_input.ReadByte();
if (-1 == lo)
return;
int hi = m_input.ReadByte();
if (-1 == hi)
return;
int src = lo >> 4 | hi << 4;
int count = Math.Min (3 + (lo & 0xF), m_output.Length - dst);
Binary.CopyOverlapped (m_output, dst-src, dst, count);
dst += count;
}
}
}
}
void UnpackRle (byte[] rgb)
{
int rgb_src = LittleEndian.ToInt32 (m_output, 0);
bool skip = 0 == LittleEndian.ToInt32 (m_output, 8);
int ctl_src = 12;
int dst = 0;
while (dst < rgb.Length)
{
int n = LittleEndian.ToInt32 (m_output, ctl_src);
ctl_src += 4;
if (skip)
{
dst += n * 4;
}
else
{
for (; n != 0; --n)
{
rgb[dst++] = m_output[rgb_src++];
rgb[dst++] = m_output[rgb_src++];
rgb[dst++] = m_output[rgb_src++];
rgb[dst++] = 0xFF;
}
}
skip = !skip;
}
}
void UnpackRleAlpha (byte[] rgb)
{
int rgb_src = LittleEndian.ToInt32 (m_output, 0);
int ctl_src = 8;
int dst = 0;
while (dst < rgb.Length)
{
int count = LittleEndian.ToUInt16 (m_output, ctl_src);
ctl_src += 2;
int control = count >> 14;
count &= 0x3FFF;
if (0 == control)
{
dst += 4 * count;
}
else
{
for (; count != 0; --count)
{
rgb[dst++] = m_output[rgb_src++];
rgb[dst++] = m_output[rgb_src++];
rgb[dst++] = m_output[rgb_src++];
if (1 == control)
rgb[dst++] = 0xFF;
else
rgb[dst++] = m_output[ctl_src++];
}
}
}
}
void UnpackSpdc ()
{
int pixel_size = m_info.BPP / 8;
int stride = pixel_size * (int)m_info.Width;
int[] offset_table = new int[28];
int i = 0;
while (i < 16)
offset_table[i++] = -pixel_size;
while (i < 24)
offset_table[i++] = -stride;
while (i < 26)
offset_table[i++] = -stride - pixel_size;
while (i < 28)
offset_table[i++] = -stride + pixel_size;
int dst = 0;
for (i = 0; i < pixel_size; ++i)
m_output[dst++] = (byte)GetBits (8);
while (dst < m_output.Length)
{
int x = GetBits (5, true);
if (x > 0x1B)
{
GetBits (3);
m_output[dst+2] = (byte)GetBits (8);
m_output[dst+1] = (byte)GetBits (8);
m_output[dst] = (byte)GetBits (8);
}
else
{
int src = dst + offset_table[x];
m_output[dst] = m_output[src];
m_output[dst+1] = m_output[src+1];
m_output[dst+2] = m_output[src+2];
GetBits (DiffPrefixTable[x] >> 1);
if (0 != (DiffPrefixTable[x] & 1))
{
int i1 = GetBits (8, true);
int i2 = GetBits (8 + DiffLengthsTable[i1], true) & 0xFF;
int i3 = GetBits (8 + DiffLengthsTable[i1] + DiffLengthsTable[i2], true) & 0xFF;
m_output[dst] += DiffTable[i1];
m_output[dst+1] += (byte)(DiffTable[i1] + DiffTable[i2]);
m_output[dst+2] += (byte)(DiffTable[i1] + DiffTable[i3]);
GetBits (DiffLengthsTable[i1] + DiffLengthsTable[i2] + DiffLengthsTable[i3]);
}
}
dst += pixel_size;
}
}
int m_bits = 0;
int m_cached_bits = 0;
// FIXME: add 'peek' feature to MsbBitStream class
int GetBits (int count, bool peek = false)
{
while (m_cached_bits < count)
{
int b = m_input.ReadByte();
if (-1 == b)
return 0;
m_bits = (m_bits << 8) | b;
m_cached_bits += 8;
}
int mask = (1 << count) - 1;
int left_bits = m_cached_bits - count;
if (!peek)
m_cached_bits = left_bits;
return (m_bits >> left_bits) & mask;
}
static readonly byte[] DiffPrefixTable = {
0x4, 0x4, 0x4, 0x4, 0x4, 0x4, 0x4, 0x4,
0x5, 0x5, 0x5, 0x5, 0x5, 0x5, 0x5, 0x5,
0x6, 0x6, 0x6, 0x6, 0x7, 0x7, 0x7, 0x7,
0xA, 0xB, 0xA, 0xB,
};
static readonly byte[] DiffLengthsTable = {
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
};
static readonly byte[] DiffTable = {
0x10, 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1, 0xF0,
0x08, 0x08, 0x07, 0x07, 0x06, 0x06, 0x05, 0x05, 0xFB, 0xFB, 0xFA, 0xFA, 0xF9, 0xF9, 0xF8, 0xF8,
0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
};
#region IDisposable Members
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
_disposed = true;
}
}
#endregion
}
}
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