postproc: Tweaks to line drawing and blending.
Turned down the blending level to make colored blocks obscure the video less. Not blending the entire block to give distinction to macro block edges. Added configuration so that macro block blending function can be optimized. Change to constrain line as to when dx and dy are computed. Now draw two lines to form an arrow. Change-Id: Id3ef0fdeeab2949a6664b2c63e2a3e1a89503f6c
Showing with 55 additions and 21 deletions