code: func GetShaderSource(shader uint32, bufSize int32, length *int32, source *uint8) {
  	syscall.Syscall6(gpGetShaderSource, 4, uintptr(shader), uintptr(bufSize), uintptr(unsafe.Pointer(length)), uintptr(unsafe.Pointer(source)), 0, 0)
  }
docs: // Returns the source code string from a shader object