Improve performance in Surface::swap TRAC #12145 - Create the flip RT texture once. - Use state blocks for swap and restore all previous state. Signed-off-by: Nicolas Capens Signed-off-by: Daniel Koch Author: Andrew Lewycky git-svn-id: https://angleproject.googlecode.com/svn/trunk@256 736b8ea6-26fd-11df-bfd4-992fa37f6226