private ContentReader GetContentReaderFromXnb(string originalAssetName, Stream stream, BinaryReader xnbReader, Action <IDisposable> recordDisposableObject)
{
// 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 != 5 && version != 4)
{
throw new ContentLoadException("Invalid XNB version");
}
// The next int32 is the length of the XNB file
int xnbLength = xnbReader.ReadInt32();
Stream decompressedStream = null;
#if WEB
decompressedStream = stream;
#else
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;
}
#endif
var reader = new ContentReader(this, decompressedStream, this.graphicsDeviceService.GraphicsDevice,
originalAssetName, version, recordDisposableObject);
return(reader);
}
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);
}
private XnbStreamReader DecodeXnbStreamReader(XnbStreamReader endcodedXnbStreamReader, XnbFlags flags, int size)
{
// check if file size is equal to stream size
if (endcodedXnbStreamReader.BaseStream.Length != size)
{
throw new XnbException("XNB file has been truncated!");
}
// check if stream is compressed
if (!flags.HasFlag(XnbFlags.ContentCompressedLzx))
{
return(endcodedXnbStreamReader);
}
var decompressedSize = (int)endcodedXnbStreamReader.ReadUInt32();
var compressedSize = size - XnbCompressedPrologueSize;
var decompressedStream = new LzxDecoderStream(endcodedXnbStreamReader.BaseStream, decompressedSize, compressedSize);
return(new XnbStreamReader(decompressedStream));
}
