# check if DRI is available, show an error and exit if it isn't function checkDriOK () { if [ `glxinfo | grep "direct rendering: " | head -n 1 | cut -d " " -f 3` != Yes ]; then zenity --error --text="Your system currently is not capable of hardware \ accelerated 3D. Therefore $1 cannot run. Usually the cause of this error is that there are no Free Software drivers \ for your graphics card, please contact your graphics card manufacturer and \ kindly ask them to provide Free Software support for your card." exit 1; fi }