static int rgbIntToHi15(int rgb) {
  int r = (rgb >> 16) & 0xFF;
  int g = (rgb >> 8) & 0xFF;
  int b = rgb & 0xFF;
  r >>= 3;
  g >>= 3;
  b >>= 3;
  ret (r << 10) | (g << 5) | b;
}