public static AImageScheme GetScheme(string title)
{
AImageScheme scheme = null;
if (string.IsNullOrEmpty(title) || !KnownSchemes.TryGetValue(title, out scheme))
{
return(null);
}
return(scheme);
}
protected override IImageDecoder DecryptImage(IBinaryStream input, AImageScheme scheme)
{
int id = input.ReadByte();
if (id == scheme.Value2)
{
return(new AImageReader(input, scheme));
}
input.Position = 0;
return(new ImageFormatDecoder(input));
}
protected virtual IImageDecoder DecryptImage(IBinaryStream input, AImageScheme scheme)
{
int type = input.ReadByte();
if ('c' == type || 'b' == type)
{
uint img_size = Binary.BigEndian(input.ReadUInt32());
long start_pos = input.Length - img_size;
input = BinaryStream.FromStream(new StreamRegion(input.AsStream, start_pos, img_size), input.Name);
}
else if (scheme != null && ('a' == type || 'd' == type) && input.Length > 21)
{
int id = input.ReadByte();
if (id == scheme.Value2)
{
return(new AImageReader(input, scheme, type));
}
}
input.Position = 0;
return(new ImageFormatDecoder(input));
}
public BellArchive(ArcView arc, ArchiveFormat impl, ICollection <Entry> dir, AImageScheme scheme)
: base(arc, impl, dir)
{
Scheme = scheme;
}
public AImageReader(IBinaryStream input, AImageScheme scheme, int type = 'a')
{
m_input = input;
m_scheme = scheme;
m_type = type;
}
public AImageReader(IBinaryStream input, AImageScheme scheme)
{
m_input = input;
m_scheme = scheme;
}
