# File lib/pixels.rb, line 625
625:     def color_from_rgba(r, g, b, a)
626:       # Pack 8-bit-per-channel values
627:       return ((a.to_i & 0xff) << 24) |
628:              ((r.to_i & 0xff) << 16) |
629:              ((g.to_i & 0xff) << 8) |
630:              (b.to_i & 0xff)
631:     end