Use SSE2 to swizzle RGBA to BGRA Using SSE2 can drastically reduce the amount of time it takes to do glTexImage2D. I've also added a plain-C path that's much faster than the one that was there before. BUG=151 TEST= Review URL: http://codereview.appspot.com/4465052 git-svn-id: https://angleproject.googlecode.com/svn/trunk@649 736b8ea6-26fd-11df-bfd4-992fa37f6226