Introduce independent hstride and vstride, and use them. am: bb7b551f97
am: e57872a252

* commit 'e57872a25271f414c8b231bc735f9092fc6c217f':
  Introduce independent hstride and vstride, and use them.

Change-Id: Id9fd574f0ea3563283a64638caa523647198f7d4