How to easy create and init a large array? Its have values

[sls1005]

Don't understand the first question. What's `atlas_texture_src`? Does it have a 
mode?

For the second question:
    
    
    converter toAddr[I, T](a: array[I, T]): ptr T = addr(a[0])
    
    proc f(p: ptr int) =
      echo p[]
    
    var arr = [1, 2, 3]
    f(arr)
    #works on 2.0.2
    
    
    Run