public static ContentReaderShim GetContentReaderFromXnb(string originalAssetName, Stream stream, BinaryReader xnbReader)
{
// The first 4 bytes should be the "XNB" header. i use that to detect an invalid file
byte x = xnbReader.ReadByte();
byte n = xnbReader.ReadByte();
byte b = xnbReader.ReadByte();
byte platform = xnbReader.ReadByte();
if (x != 'X' || n != 'N' || b != 'B' ||
!(targetPlatformIdentifiers.Contains((char)platform)))
{
throw new ContentLoadException("Asset does not appear to be a valid XNB file. Did you process your content for Windows?");
}
byte version = xnbReader.ReadByte();
byte flags = xnbReader.ReadByte();
bool compressedLzx = (flags & ContentCompressedLzx) != 0;
bool compressedLz4 = (flags & ContentCompressedLz4) != 0;
if (version != 6 && version != 5)
{
throw new ContentLoadException("Invalid XNB version");
}
// The next int32 is the length of the XNB file
int xnbLength = xnbReader.ReadInt32();
Stream decompressedStream = null;
if (compressedLzx || compressedLz4)
{
// Decompress the xnb
int decompressedSize = xnbReader.ReadInt32();
if (compressedLzx)
{
int compressedSize = xnbLength - 14;
decompressedStream = new LzxDecoderStream(stream, decompressedSize, compressedSize);
}
else if (compressedLz4)
{
decompressedStream = new Lz4DecoderStream(stream);
}
}
else
{
decompressedStream = stream;
}
var reader = new ContentReaderShim(decompressedStream, version);
return(reader);
}
public ContentTypeReaderManager(ContentReaderShim reader)
{
this._reader = reader;
}