EnvmapAttribute::readValueFrom (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is, int size, int version)
{
    unsigned char tmp;
    Xdr::read <StreamIO> (is, tmp);
    _value = Envmap (tmp);
}
EnvmapAttribute::readValueFrom (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is, int size, int version)
{
    unsigned char tmp;
    Xdr::read <StreamIO> (is, tmp);
    _value = Envmap (tmp);
}