<br />
<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_bqbngesjfldj220lumqjcuaqus, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
<br />
<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
sinterface Decolorizer {
  int toGrayScale(int rgb);
  
  default int toGrayScale(Color color) {
    ret toGrayScale(colorToRGBInt(color));
  }
  
  srecord Red is Decolorizer {
    public int toGrayScale(int rgb) { ret (rgb >> 16) & 0xFF; }
  }
  
  srecord Green is Decolorizer {
    public int toGrayScale(int rgb) { ret (rgb >> 8) & 0xFF; }
  }
  
  srecord Blue is Decolorizer {
    public int toGrayScale(int rgb) { ret rgb & 0xFF; }
  }
  
  srecord Alpha is Decolorizer {
    public int toGrayScale(int rgb) { ret (rgb >> 24) & 0xFF; }
  }
  
  // just the average of the 3 channels
  srecord Simple is Decolorizer {
    public int toGrayScale(int rgb) {
      int r = (rgb >> 16) & 0xFF;
      int g = (rgb >> 8) & 0xFF;
      int b = rgb & 0xFF;
      ret (r+g+b+1)/3;
    }
  }
}