public static ShaderFileFormat Detect(Stream stream)
{
long tempPosition = stream.Position;
var format = ShaderFileFormat.Unknown;
using (var reader = new BinaryReader(stream, new UTF8Encoding(), true))
{
uint signature = (uint)reader.ReadInt32();
if (signature == FourCC.Make("rgxa"))
{
format = ShaderFileFormat.Rgxa;
}
else
{
stream.Position = tempPosition;
signature = reader.ReadUInt32();
if (signature == 0xFFFE0300 || signature == 0xFFFF0300)
{
format = ShaderFileFormat.Hlsl;
}
}
}
stream.Position = tempPosition;
return(format);
}
public void ReadFileHeader()
{
int signature = ReadInt32();
if (signature != FourCC.Make("rgxa"))
{
Console.WriteLine("Error: unknown file format!");
throw new InvalidDataException();
}
numShaders = ReadByte();
location = Location.VertexShaders;
}
private byte[] GetConstantTableData()
{
int ctabToken = FourCC.Make("CTAB");
var ctabComment = Instructions.FirstOrDefault(x => x.Opcode == Opcode.Comment && x.Params[0] == ctabToken);
if (ctabComment == null)
{
return(null);
}
byte[] constantTable = new byte[ctabComment.Params.Length * 4];
for (int i = 1; i < ctabComment.Params.Length; i++)
{
constantTable[i * 4 - 4] = (byte)(ctabComment.Params[i] & 0xFF);
constantTable[i * 4 - 3] = (byte)((ctabComment.Params[i] >> 8) & 0xFF);
constantTable[i * 4 - 2] = (byte)((ctabComment.Params[i] >> 16) & 0xFF);
constantTable[i * 4 - 1] = (byte)((ctabComment.Params[i] >> 24) & 0xFF);
}
return(constantTable);
}
