Lode Vandevenne fb4c7832f1 lossless: simpler alpha cleanup preprocessing
setting all transparent pixels to black rather than the "flatten" method.

0.3% smaller filesize on the 1000 PNGs if alpha cleanup is used (before: 18685774, after: 18622472)

Change-Id: Ib0db9e7ccde55b36e82de07855f2dbb630fe62b1
2015-12-17 15:04:50 +01:00
..
2015-12-15 23:36:12 -08:00
2015-12-15 19:26:13 -08:00
2015-12-17 07:03:25 +00:00
2015-10-28 23:43:40 -07:00