public RobloxBinaryFile(byte[] contents)
{
using (MemoryStream file = new MemoryStream(contents))
using (RobloxBinaryReader reader = new RobloxBinaryReader(file))
{
// Verify the signature of the file.
byte[] binSignature = reader.ReadBytes(14);
string signature = Encoding.UTF7.GetString(binSignature);
if (signature != MagicHeader)
{
throw new InvalidDataException("Provided file's signature does not match RobloxBinaryFile.MagicHeader!");
}
// Read header data.
Version = reader.ReadUInt16();
NumTypes = reader.ReadUInt32();
NumInstances = reader.ReadUInt32();
Reserved = reader.ReadBytes(8);
// Begin reading the file chunks.
bool reading = true;
Types = new INST[NumTypes];
Instances = new FileInstance[NumInstances];
while (reading)
{
try
{
RobloxBinaryChunk chunk = new RobloxBinaryChunk(reader);
Chunks.Add(chunk);
switch (chunk.ChunkType)
{
case "INST":
INST type = new INST(chunk);
type.Allocate(this);
break;
case "PROP":
PROP prop = new PROP(chunk);
prop.ReadProperties(this);
break;
case "PRNT":
PRNT hierarchy = new PRNT(chunk);
hierarchy.Assemble(this);
break;
case "META":
Metadata = new META(chunk);
break;
case "END\0":
reading = false;
break;
default:
Chunks.Remove(chunk);
break;
}
}
catch (EndOfStreamException)
{
throw new Exception("Unexpected end of file!");
}
}
}
}
public void ReadProperties(RobloxBinaryFile file)
{
INST type = file.Types[TypeIndex];
FileProperty[] props = new FileProperty[type.NumInstances];
int[] ids = type.InstanceIds;
int instCount = type.NumInstances;
for (int i = 0; i < instCount; i++)
{
int id = ids[i];
FileInstance instance = file.Instances[id];
FileProperty prop = new FileProperty();
prop.Instance = instance;
prop.Name = Name;
prop.Type = Type;
props[i] = prop;
instance.AddProperty(ref prop);
}
// Setup some short-hand functions for actions frequently used during the read procedure.
var readInts = new Func <int[]>(() => Reader.ReadInts(instCount));
var readFloats = new Func <float[]>(() => Reader.ReadFloats(instCount));
var loadProperties = new Action <Func <int, object> >(read =>
{
for (int i = 0; i < instCount; i++)
{
object result = read(i);
props[i].Value = result;
}
});
// Read the property data based on the property type.
// NOTE: This only reads the property types needed for Rbx2Source.
// You can visit the following link for a full implementation:
// https://github.com/CloneTrooper1019/Roblox-File-Format/blob/master/BinaryFormat/ChunkTypes/PROP.cs
switch (Type)
{
case PropertyType.String:
loadProperties(i => Reader.ReadString());
break;
case PropertyType.Bool:
loadProperties(i => Reader.ReadBoolean());
break;
case PropertyType.Int:
int[] ints = readInts();
loadProperties(i => ints[i]);
break;
case PropertyType.Float:
float[] floats = readFloats();
loadProperties(i => floats[i]);
break;
case PropertyType.Double:
loadProperties(i => Reader.ReadDouble());
break;
case PropertyType.Vector3:
float[] Vector3_X = readFloats(),
Vector3_Y = readFloats(),
Vector3_Z = readFloats();
loadProperties(i =>
{
float x = Vector3_X[i],
y = Vector3_Y[i],
z = Vector3_Z[i];
return(new Vector3(x, y, z));
});
break;
case PropertyType.BrickColor:
int[] brickColorIds = readInts();
loadProperties(i =>
{
int brickColorId = brickColorIds[i];
return(BrickColor.FromNumber(brickColorId));
});
break;
case PropertyType.CFrame:
case PropertyType.Quaternion:
// Temporarily load the rotation matrices into their properties.
// We'll update them to CFrames once we iterate over the position data.
loadProperties(i =>
{
int normXY = Reader.ReadByte();
if (normXY > 0)
{
// Make sure this value is in a safe range.
normXY = (normXY - 1) % 36;
NormalId normX = (NormalId)(normXY / 6);
Vector3 R0 = Vector3.FromNormalId(normX);
NormalId normY = (NormalId)(normXY % 6);
Vector3 R1 = Vector3.FromNormalId(normY);
// Compute R2 using the cross product of R0 and R1.
Vector3 R2 = R0.Cross(R1);
// Generate the rotation matrix and return it.
return(new float[9]
{
R0.X, R0.Y, R0.Z,
R1.X, R1.Y, R1.Z,
R2.X, R2.Y, R2.Z,
});
}
else if (Type == PropertyType.Quaternion)
{
float qx = Reader.ReadFloat(), qy = Reader.ReadFloat(),
qz = Reader.ReadFloat(), qw = Reader.ReadFloat();
Quaternion quaternion = new Quaternion(qx, qy, qz, qw);
var rotation = quaternion.ToCFrame();
return(rotation.GetComponents());
}
else
{
float[] matrix = new float[9];
for (int m = 0; m < 9; m++)
{
float value = Reader.ReadFloat();
matrix[m] = value;
}
return(matrix);
}
});
float[] CFrame_X = readFloats(),
CFrame_Y = readFloats(),
CFrame_Z = readFloats();
loadProperties(i =>
{
float[] matrix = props[i].Value as float[];
float x = CFrame_X[i],
y = CFrame_Y[i],
z = CFrame_Z[i];
float[] position = new float[3] {
x, y, z
};
float[] components = position
.Concat(matrix)
.ToArray();
return(new CFrame(components));
});
break;
case PropertyType.Enum:
uint[] enums = Reader.ReadInterleaved(instCount, BitConverter.ToUInt32);
loadProperties(i => enums[i]);
break;
case PropertyType.Ref:
int[] instIds = Reader.ReadInstanceIds(instCount);
loadProperties(i =>
{
int instId = instIds[i];
return(instId >= 0 ? file.Instances[instId] : null);
});
break;
case PropertyType.Color3uint8:
byte[] Color3uint8_R = Reader.ReadBytes(instCount),
Color3uint8_G = Reader.ReadBytes(instCount),
Color3uint8_B = Reader.ReadBytes(instCount);
loadProperties(i =>
{
byte r = Color3uint8_R[i],
g = Color3uint8_G[i],
b = Color3uint8_B[i];
return(Color.FromArgb(r, g, b));
});
break;
case PropertyType.Int64:
long[] int64s = Reader.ReadInterleaved(instCount, (buffer, start) =>
{
long result = BitConverter.ToInt64(buffer, start);
return((long)((ulong)result >> 1) ^ (-(result & 1)));
});
loadProperties(i => int64s[i]);
break;
}
Reader.Dispose();
}