public override Stream OpenEntry(ArcFile arc, Entry entry)
{
if (entry.Size <= 8
|| !entry.Name.EndsWith (".snc", StringComparison.InvariantCultureIgnoreCase)
|| !arc.File.View.AsciiEqual (entry.Offset, "CMP_"))
return arc.File.CreateStream (entry.Offset, entry.Size);
int unpacked_size = arc.File.View.ReadInt32 (entry.Offset+4);
using (var input = arc.File.CreateStream (entry.Offset+8, entry.Size-8))
using (var lzss = new LzssReader (input, (int)(entry.Size - 8), unpacked_size))
{
lzss.FrameFill = 0x20;
lzss.Unpack();
return new MemoryStream (lzss.Data);
}
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = (GrMetaData)info;
using (var reader = new LzssReader (stream, (int)stream.Length, meta.UnpackedSize+2))
{
reader.Unpack();
if (32 != info.BPP)
using (var bmp = new MemoryStream (reader.Data))
return base.Read (bmp, info);
int stride = (int)info.Width*4;
var pixels = new byte[stride*info.Height];
int dst = 0;
int offset = 0x36;
for (int src = stride*((int)info.Height-1); src >= 0; src -= stride)
{
Buffer.BlockCopy (reader.Data, offset+src, pixels, dst, stride);
dst += stride;
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
}
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
if (0 == entry.Size)
return Stream.Null;
var larc = arc as LuciArchive;
var lent = entry as LuciEntry;
Stream input = arc.File.CreateStream (entry.Offset, entry.Size);
if (null == larc || null == lent)
return input;
byte[] data;
using (input)
{
if (lent.IsPacked)
{
using (var reader = new LzssReader (input, (int)lent.Size, (int)lent.UnpackedSize))
{
reader.Unpack();
data = reader.Data;
}
}
else
{
data = new byte[lent.Size];
input.Read (data, 0, data.Length);
}
}
if (larc.Info.WholeCrypt)
{
DecryptContent (data, larc.Scheme.ContentXor);
}
if (larc.Info.IsEncrypted)
{
int count = Math.Min (data.Length, 0x100);
if (count != 0)
DecryptEntry (data, count, larc.Info.Key, larc.Scheme.RotatePattern);
}
input = new MemoryStream (data);
if (null != larc.Info.Prefix)
return new PrefixStream (larc.Info.Prefix, input);
else
return input;
}
static byte[] DecodeListBin(byte[] data)
{
var header = new byte[0x30];
DecodeDPD (data, 0, 0x30, header);
int packed_size = LittleEndian.ToInt32 (header, 0x0C);
int unpacked_size = LittleEndian.ToInt32 (header, 0x10);
if (packed_size <= 0 || packed_size > data.Length-0x30)
return null;
if (Binary.AsciiEqual (header, 0, "DPDC"))
{
var decrypted = new byte[packed_size];
DecodeDPD (data, 0x30, packed_size, decrypted);
return decrypted;
}
if (Binary.AsciiEqual (header, 0, "SZLC")) // LZSS
{
using (var input = new MemoryStream (data, 0x30, packed_size))
using (var lzss = new LzssReader (input, packed_size, unpacked_size))
{
lzss.Unpack();
return lzss.Data;
}
}
if (Binary.AsciiEqual (header, 0, "ELRC")) // RLE
{
var unpacked = new byte[unpacked_size];
int min_repeat = LittleEndian.ToInt32 (header, 0x1C);
DecodeRLE (data, 0x30, packed_size, unpacked, min_repeat);
return unpacked;
}
return null;
}
public override ImageMetaData ReadMetaData(Stream stream)
{
using (var reader = new LzssReader (stream, (int)stream.Length, 0x26)) // BMP header
{
reader.Unpack();
var bmp = reader.Data;
if (bmp[0] != 'B' || bmp[1] != 'M')
return null;
int file_size = LittleEndian.ToInt32 (bmp, 2);
int width = LittleEndian.ToInt32 (bmp, 0x12);
int height = LittleEndian.ToInt32 (bmp, 0x16);
int bpp = LittleEndian.ToInt16 (bmp, 0x1c);
int image_size = LittleEndian.ToInt32 (bmp, 0x22);
if (0 == image_size)
image_size = width * height * (bpp / 8);
return new GrMetaData
{
Width = (uint)width,
Height = (uint)height,
BPP = bpp,
UnpackedSize = 24 == bpp ? file_size : (image_size+0x36),
};
}
}
public override ImageData Read(Stream file, ImageMetaData info)
{
var meta = (GgdMetaData)info;
file.Position = meta.HeaderSize + 4;
var palette_data = new byte[0x400];
if (palette_data.Length != file.Read (palette_data, 0, palette_data.Length))
throw new InvalidFormatException();
var colors = new Color[256];
for (int i = 0; i < 256; ++i)
{
colors[i] = Color.FromRgb (palette_data[i*4+2], palette_data[i*4+1], palette_data[i*4]);
}
file.Seek (4, SeekOrigin.Current);
int input_size = (int)(file.Length - file.Position);
using (var reader = new LzssReader (file, input_size, (int)meta.BitmapSize))
{
reader.Unpack();
var palette = new BitmapPalette (colors);
int stride = ((int)meta.Width + 3) & ~3;
return ImageData.Create (info, PixelFormats.Indexed8, palette, reader.Data, stride);
}
}
// DOUBLE
private ImageData ReadV2()
{
if (0 != m_info.PackedSize)
{
using (var reader = new LzssReader (m_input, m_info.PackedSize, m_info.UnpackedSize))
{
reader.Unpack();
m_image_data = reader.Data;
}
}
else
{
m_image_data = new byte[m_info.UnpackedSize];
if (m_image_data.Length != m_input.Read (m_image_data, 0, m_image_data.Length))
throw new InvalidFormatException ("Unexpected end of file");
}
int pixels_offset = 0;
if (8 == m_info.BPP)
{
SetPalette (m_image_data);
pixels_offset += 0x400;
}
if (0 == pixels_offset)
return ImageData.Create (m_info, Format, Palette, m_image_data);
if (pixels_offset + m_stride*(int)m_info.Height > m_image_data.Length)
throw new InvalidFormatException();
unsafe
{
fixed (byte* pixels = &m_image_data[pixels_offset])
{
var bitmap = BitmapSource.Create ((int)m_info.Width, (int)m_info.Height,
ImageData.DefaultDpiX, ImageData.DefaultDpiY, Format, Palette,
(IntPtr)pixels, m_image_data.Length-pixels_offset, m_stride);
bitmap.Freeze();
return new ImageData (bitmap, m_info);
}
}
}
private ImageData ReadV1()
{
if (8 == m_info.BPP)
{
var palette_data = new byte[0x400];
if (palette_data.Length != m_input.Read (palette_data, 0, palette_data.Length))
throw new InvalidFormatException ("Unexpected end of file");
SetPalette (palette_data);
}
var packed = new byte[m_info.PackedSize];
if (packed.Length != m_input.Read (packed, 0, packed.Length))
throw new InvalidFormatException ("Unexpected end of file");
for (int i = 0; i < packed.Length; ++i)
packed[i] ^= (byte)i;
using (var input = new MemoryStream (packed))
using (var reader = new LzssReader (input, packed.Length, m_info.UnpackedSize))
{
reader.Unpack();
m_image_data = new byte[m_info.UnpackedSize];
// flip pixels vertically
int dst = 0;
for (int src = m_stride * ((int)m_info.Height-1); src >= 0; src -= m_stride)
{
Buffer.BlockCopy (reader.Data, src, m_image_data, dst, m_stride);
dst += m_stride;
}
}
return ImageData.Create (m_info, Format, Palette, m_image_data);
}
