private void ReadHeaderInfo(EndiannessAwareBinaryReader reader)
{
MagicBytes = reader.ReadBytes(4, ByteOrder.LittleEndian);
if (!IsValidPAC)
{
return;
}
HeaderSize = reader.ReadUInt32();
FileLength = reader.ReadUInt32();
FileCount = reader.ReadUInt32();
Parameters = (PACParameters)reader.ReadInt32();
FileNameLength = reader.ReadInt32();
reader.BaseStream.Seek(8, SeekOrigin.Current);
}
public Bitmap GetImage()
{
var initstream = GetReadStream();
var reader =
new EndiannessAwareBinaryReader(initstream, Encoding.Default, true, Endianness);
try
{
var savpos = reader.BaseStream.Position;
if (reader.ReadInt32(ByteOrder.LittleEndian) == 0x73676573)
{
Endianness = ByteOrder.BigEndian;
reader.BaseStream.Seek(-4, SeekOrigin.Current);
reader.Close();
reader.Dispose();
reader = new EndiannessAwareBinaryReader(
SEGSCompression.DecompressStream(initstream, Endianness), Endianness);
}
else
{
reader.BaseStream.Seek(12, SeekOrigin.Current);
if (reader.BaseStream.Position != reader.BaseStream.Length)
{
if (reader.ReadInt32(ByteOrder.LittleEndian) == 0x73676573)
{
Endianness = ByteOrder.BigEndian;
reader.BaseStream.Seek(-4, SeekOrigin.Current);
reader.Close();
reader.Dispose();
reader = new EndiannessAwareBinaryReader(
SEGSCompression.DecompressStream(initstream, Endianness), Endianness);
}
else
{
reader.BaseStream.Seek(-20, SeekOrigin.Current);
}
}
else
{
reader.BaseStream.Position = savpos;
}
}
if (!endiannessChecked)
{
CheckEndianness(reader.ReadBytes(4));
reader.ChangeEndianness(Endianness);
reader.BaseStream.Seek(-4, SeekOrigin.Current);
}
using (var memStream = new MemoryStream())
{
reader.BaseStream.CopyTo(memStream);
var ddsImage = new DDSImage(memStream.ToArray(), Endianness);
if (ddsImage.BitmapImage == null)
{
return(null);
}
return(ddsImage.BitmapImage);
}
}
catch
{
return(null);
}
finally
{
reader.Close();
reader.Dispose();
initstream.Close();
initstream.Dispose();
}
}
