public override ImageMetaData ReadMetaData(Stream stream)
{
using (var input = new ArcView.Reader(stream))
{
int width = input.ReadInt16();
int height = input.ReadInt16();
if (width <= 0 || height <= 0)
{
return(null);
}
int bpp = input.ReadInt32();
if (24 != bpp && 32 != bpp && 8 != bpp)
{
return(null);
}
if (0 != input.ReadInt64())
{
return(null);
}
return(new ImageMetaData
{
Width = (uint)width,
Height = (uint)height,
BPP = bpp,
});
}
}
} // '256G'
public override ImageMetaData ReadMetaData(Stream stream)
{
using (var input = new ArcView.Reader(stream))
{
input.ReadUInt32();
var info = new GgdMetaData {
BPP = 8
};
info.HeaderSize = input.ReadUInt32();
info.Width = input.ReadUInt32();
int height = input.ReadInt32();
if (height < 0)
{
height = -height;
info.Flipped = true;
}
info.Height = (uint)height;
input.ReadInt64();
info.BitmapSize = input.ReadUInt32();
return(info);
}
}
public override ArcFile TryOpen(ArcView file)
{
if (!file.Name.HasExtension(".paz"))
{
return(null);
}
uint signature = file.View.ReadUInt32(0);
// XXX encryption is queried for every .paz file
var scheme = QueryEncryption(file.Name, signature);
uint start_offset = scheme.Version > 0 ? 0x20u : 0u;
uint index_size = file.View.ReadUInt32(start_offset);
start_offset += 4;
byte xor_key = (byte)(index_size >> 24);
if (xor_key != 0)
{
index_size ^= (uint)(xor_key << 24 | xor_key << 16 | xor_key << 8 | xor_key);
}
if (0 != (index_size & 7) || index_size + start_offset >= file.MaxOffset)
{
return(null);
}
var arc_list = new List <Entry>();
var arc_dir = VFS.GetDirectoryName(file.Name);
long max_offset = file.MaxOffset;
for (char suffix = 'A'; suffix <= 'Z'; ++suffix)
{
var part_name = VFS.CombinePath(arc_dir, file.Name + suffix);
if (!VFS.FileExists(part_name))
{
break;
}
var part = VFS.FindFile(part_name);
arc_list.Add(part);
max_offset += part.Size;
}
var arc_name = Path.GetFileNameWithoutExtension(file.Name).ToLowerInvariant();
bool is_audio = AudioPazNames.Contains(arc_name);
bool is_video = VideoPazNames.Contains(arc_name);
Stream input = file.CreateStream(start_offset, index_size);
byte[] video_key = null;
List <Entry> dir;
try
{
if (xor_key != 0)
{
input = new XoredStream(input, xor_key);
}
var enc = new Blowfish(scheme.ArcKeys[arc_name].IndexKey);
input = new InputCryptoStream(input, enc.CreateDecryptor());
using (var index = new ArcView.Reader(input))
{
int count = index.ReadInt32();
if (!IsSaneCount(count))
{
return(null);
}
if (is_video)
{
video_key = index.ReadBytes(0x100);
}
dir = new List <Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = index.BaseStream.ReadCString();
var entry = FormatCatalog.Instance.Create <PazEntry> (name);
entry.Offset = index.ReadInt64();
entry.UnpackedSize = index.ReadUInt32();
entry.Size = index.ReadUInt32();
entry.AlignedSize = index.ReadUInt32();
if (!entry.CheckPlacement(max_offset))
{
return(null);
}
entry.IsPacked = index.ReadInt32() != 0;
if (string.IsNullOrEmpty(entry.Type) && is_audio)
{
entry.Type = "audio";
}
if (scheme.Version > 0)
{
string password = "";
if (!entry.IsPacked && scheme.TypeKeys != null)
{
password = scheme.GetTypePassword(name, is_audio);
}
if (!string.IsNullOrEmpty(password) || is_video)
{
password = string.Format("{0} {1:X08} {2}", name.ToLowerInvariant(), entry.UnpackedSize, password);
entry.Key = Encodings.cp932.GetBytes(password);
}
}
dir.Add(entry);
}
}
}
finally
{
input.Dispose();
}
List <ArcView> parts = null;
if (arc_list.Count > 0)
{
parts = new List <ArcView> (arc_list.Count);
try
{
foreach (var arc_entry in arc_list)
{
var arc_file = VFS.OpenView(arc_entry);
parts.Add(arc_file);
}
}
catch
{
foreach (var part in parts)
{
part.Dispose();
}
throw;
}
}
if (is_video)
{
if (scheme.Version < 1)
{
var table = new byte[0x100];
for (int i = 0; i < 0x100; ++i)
{
table[video_key[i]] = (byte)i;
}
video_key = table;
}
return(new MovPazArchive(file, this, dir, scheme.Version, xor_key, video_key, parts));
}
return(new PazArchive(file, this, dir, scheme.Version, xor_key, scheme.ArcKeys[arc_name].DataKey, parts));
}
public override ImageMetaData ReadMetaData(Stream stream)
{
using (var input = new ArcView.Reader (stream))
{
input.ReadUInt32();
var info = new GgdMetaData { BPP = 8 };
info.HeaderSize = input.ReadUInt32();
info.Width = input.ReadUInt32();
int height = input.ReadInt32();
if (height < 0)
{
height = -height;
info.Flipped = true;
}
info.Height = (uint)height;
input.ReadInt64();
info.BitmapSize = input.ReadUInt32();
return info;
}
}
public override ImageMetaData ReadMetaData(Stream stream)
{
using (var input = new ArcView.Reader (stream))
{
int width = input.ReadInt16();
int height = input.ReadInt16();
if (width <= 0 || height <= 0)
return null;
int bpp = input.ReadInt32();
if (24 != bpp && 32 != bpp && 8 != bpp)
return null;
if (0 != input.ReadInt64())
return null;
return new ImageMetaData
{
Width = (uint)width,
Height = (uint)height,
BPP = bpp,
};
}
}
