code: public void scale(float scale) {
          if (scale != 1.0f) {
              left = (int) (left * scale + 0.5f);
              top = (int) (top * scale + 0.5f);
              right = (int) (right * scale + 0.5f);
              bottom = (int) (bottom * scale + 0.5f);
          }
      }
docs: Scales up the rect by the given scale.
  
  @param scale scale