hui su 43bd895879 Make gif transparent color to be transparent black
Change it from transparent white to transparent black, which matches
the transparent color assumed in Webp dispose-to-background method.

Also pre-multiply background colors before comparison in anim_diff,
just as what is done with regular pixel values.

Change-Id: I5a790522df21619c666ce499f73e42294ed276f2
2016-09-01 16:50:14 -07:00
..
2014-10-22 17:25:41 +02:00
2010-11-17 20:09:47 -08:00