public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (FcbMetaData)info;
byte[] input;
if (1 == meta.Method)
{
stream.Position = 0x14;
int unpacked_size = Binary.BigEndian(stream.ReadInt32());
stream.ReadInt32(); // packed_size
input = new byte[unpacked_size];
using (var z = new ZLibStream(stream.AsStream, CompressionMode.Decompress, true))
if (unpacked_size != z.Read(input, 0, unpacked_size))
{
throw new EndOfStreamException();
}
}
else if (0 == meta.Method)
{
stream.Position = 0x10;
using (var tz = new TzCompression(stream.AsStream))
input = tz.Unpack();
}
else
{
throw new InvalidFormatException();
}
var pixels = Unpack(input, info);
return(ImageData.Create(info, PixelFormats.Bgra32, null, pixels));
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var xent = (Arc4Entry)entry;
Stream input;
if (1 == xent.Segments.Count)
{
input = arc.File.CreateStream(entry.Offset, entry.Size);
}
else
{
input = new Arc4Stream(arc.File, xent);
}
if (!xent.IsPacked)
{
return(input);
}
using (input)
using (var tz = new TzCompression(input))
return(new BinMemoryStream(tz.Unpack(), entry.Name));
}
public override ArcFile TryOpen(ArcView file)
{
if (0x010000 != file.View.ReadUInt32(4))
{
return(null);
}
int count = file.View.ReadInt32(0x10);
if (!IsSaneCount(count))
{
return(null);
}
uint index_length = file.View.ReadUInt32(8);
uint alignment = file.View.ReadUInt32(0xC);
int index_offset = file.View.ReadInt32(0x14);
int names_offset = file.View.ReadInt32(0x1C) - index_offset;
int segment_table = file.View.ReadInt32(0x24) - index_offset;
uint base_offset = file.View.ReadUInt32(0x2C);
if (0 == alignment || index_offset <= 0 || names_offset <= 0 || segment_table <= 0)
{
return(null);
}
if (!file.View.AsciiEqual(index_offset, "tZ"))
{
return(null);
}
byte[] index;
using (var packed = file.CreateStream(index_offset, index_length))
using (var tz = new TzCompression(packed))
index = tz.Unpack();
int current_offset = 0;
var dir = new List <Entry> (count);
for (int i = 0; i < count; ++i)
{
int name_pos = ReadInt24(index, current_offset) * 2;
int name_length = index[current_offset + 3];
int chunk_count = index[current_offset + 4];
int offset = ReadInt24(index, current_offset + 5);
var name = Binary.GetCString(index, names_offset + name_pos, name_length);
var entry = FormatCatalog.Instance.Create <Arc4Entry> (name);
entry.Segments = new List <long> (chunk_count);
if (chunk_count > 1)
{
int segment_pos = segment_table + 3 * offset;
for (int j = 0; j < chunk_count; ++j)
{
entry.Segments.Add(ReadInt24(index, segment_pos) + base_offset);
segment_pos += 3;
}
}
else
{
entry.Segments.Add(offset + base_offset);
}
for (int j = 0; j < chunk_count; ++j)
{
entry.Segments[j] *= alignment;
}
dir.Add(entry);
current_offset += 8;
}
foreach (Arc4Entry entry in dir)
{
uint size = 0;
foreach (var segment in entry.Segments)
{
size += Binary.BigEndian(file.View.ReadUInt32(segment + 4));
}
entry.Offset = entry.Segments[0] + 0x10;
entry.Size = size;
entry.IsPacked = file.View.AsciiEqual(entry.Offset, "tZ");
if (entry.IsPacked)
{
entry.UnpackedSize = file.View.ReadUInt32(entry.Offset + 2);
}
else
{
entry.UnpackedSize = size;
}
}
return(new ArcFile(file, this, dir));
}
