▁source ▁lic ensed ▁under ▁the ▁New ▁B SD ▁free ▁software ▁license . ▁ ▁Now ▁known ▁as ▁Sk ia , ▁the ▁library ▁is ▁used ▁ ▁in ▁Google ▁Chrome , ▁Chrome ▁OS , ▁Ch rom ium ▁OS , ▁Moz illa ▁Firefox , ▁Moz illa ▁Th under bird , ▁Android ▁( although ▁partially ▁su pers eded ▁by ▁H W UI ▁starting ▁with ▁Android ▁ 3 . 0 ), ▁Firefox ▁OS , ▁and ▁Fl utter . ▁The ▁Sk ia ▁library ▁is ▁also ▁present ▁on ▁the ▁Black Ber ry ▁Play Book , ▁though ▁the ▁extent ▁of ▁its ▁usage ▁is ▁unclear . ▁ ▁Sk ia ▁has ▁several ▁back - ends , ▁including ▁one ▁for ▁CPU - based ▁software ▁r aster ization , ▁one ▁for ▁PDF ▁output , ▁and ▁one ▁for ▁GPU - ac cel er ated ▁OpenGL . ▁Part ial ly ▁implemented ▁back - ends ▁( which ▁may ▁lack ▁some ▁features ) ▁are ▁also ▁available ▁for ▁OpenGL ▁ES , ▁Open V G , ▁SV G , ▁and ▁Ad obe ▁SW F ▁( Fl ash ). ▁Sk ia ▁is ▁most ▁similar ▁in ▁purpose ▁to ▁C airo ▁( mean ing ▁that ▁it ▁focus es ▁on ▁drawing ) ▁rather ▁than ▁to ▁other ▁more ▁elaborate ▁infrastr uct ures ▁like ▁Qt ▁that ▁provide ▁their ▁own ▁widget s ▁etc . ▁ ▁Mark ▁Kil g ard ▁and ▁Jeff ▁Bol z ▁explain ▁( and ▁critic ize ) ▁the ▁intern als ▁of ▁Sk ia ▁( as ▁of ▁ 2 0 1 2 ) ▁in ▁the ▁following ▁terms : ▁ ▁Since ▁then , ▁Sk ia ▁has ▁added ▁support ▁for