code: private void drawNoxItemDrawable(Canvas canvas, int left, int top, Drawable drawable) {
      if (drawable != null) {
        int itemSize = (int) noxConfig.getNoxItemSize();
        drawable.setBounds(left, top, left + itemSize, top + itemSize);
        drawable.draw(canvas);
      }
    }
docs: Draws a NoxItem drawable during the onDraw method given a canvas object and all the
  information needed to draw the Drawable passed as parameter.