As for many that know about chainfire 3d { back in android v2}, you should know of its many uses including improving graphic performance in games and enabling 2 play tegra 2 optimised games.
GL TOOLS is an all new and improved for of chainfire 3d with a wide variety of features including improving and reducing graphic performance in games {as may suit u}, changing game resolution and best of all, emulating tegra 3 and even tegra 4 games for non tegra devices{ eg half life episode 1 and 2, portal, trine 2, demon score....}.
Download d apk from play store and allow internet connection on first opening 2 download d texture plugins needed....then install and reboot and revolutionize ur android gaming experience...
N.B...Root and a writeable system partition is needed
I'm open 2 questions....