/**
  * Returns a {@link android.graphics.PixelFormat graphics.PixelFormat} value of OPAQUE or
  * TRANSLUCENT.
  */
 @Override
 public int getOpacity() {
   return mNinePatch.hasAlpha() || (mPaint != null && mPaint.getAlpha() < 255)
       ? PixelFormat.TRANSLUCENT
       : PixelFormat.OPAQUE;
 }