some backends require a call at the end of opengl
some backends require a call at the end of opengl

python-gtkglext is an example of this

cnc-club/linuxcnc,Cid427/machinekit,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,ArcEye/machinekit-testing,cdsteinkuehler/MachineKit,bmwiedemann/linuxcnc-mirror,ArcEye/machinekit-testing,narogon/linuxcnc,unseenlaser/linuxcnc,unseenlaser/machinekit,jaguarcat79/ILC-with-LinuxCNC,mhaberler/machinekit,aschiffler/linuxcnc,bmwiedemann/linuxcnc-mirror,ikcalB/linuxcnc-mirror,Cid427/machinekit,bobvanderlinden/machinekit,cnc-club/linuxcnc,aschiffler/linuxcnc,mhaberler/machinekit,jaguarcat79/ILC-with-LinuxCNC,araisrobo/machinekit,mhaberler/machinekit,cdsteinkuehler/MachineKit,cdsteinkuehler/MachineKit,aschiffler/linuxcnc,ArcEye/MK-Qt5,RunningLight/machinekit,ArcEye/machinekit-testing,mhaberler/machinekit,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,cnc-club/linuxcnc,narogon/linuxcnc,araisrobo/linuxcnc,ianmcmahon/linuxcnc-mirror,araisrobo/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,cnc-club/linuxcnc,ArcEye/MK-Qt5,Cid427/machinekit,EqAfrica/machinekit,ArcEye/machinekit-testing,unseenlaser/linuxcnc,ianmcmahon/linuxcnc-mirror,RunningLight/machinekit,jaguarcat79/ILC-with-LinuxCNC,EqAfrica/machinekit,kinsamanka/machinekit,araisrobo/linuxcnc,strahlex/machinekit,araisrobo/machinekit,ianmcmahon/linuxcnc-mirror,strahlex/machinekit,araisrobo/machinekit,bobvanderlinden/machinekit,araisrobo/linuxcnc,cdsteinkuehler/linuxcnc,ikcalB/linuxcnc-mirror,unseenlaser/machinekit,cdsteinkuehler/MachineKit,jaguarcat79/ILC-with-LinuxCNC,mhaberler/machinekit,araisrobo/machinekit,cdsteinkuehler/MachineKit,unseenlaser/linuxcnc,ArcEye/MK-Qt5,ArcEye/machinekit-testing,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/MachineKit,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,EqAfrica/machinekit,mhaberler/machinekit,Cid427/machinekit,mhaberler/machinekit,unseenlaser/machinekit,ikcalB/linuxcnc-mirror,unseenlaser/linuxcnc,ArcEye/MK-Qt5,Cid427/machinekit,bmwiedemann/linuxcnc-mirror,cnc-club/linuxcnc,unseenlaser/machinekit,araisrobo/machinekit,aschiffler/linuxcnc,strahlex/machinekit,araisrobo/machinekit,bobvanderlinden/machinekit,strahlex/machinekit,unseenlaser/machinekit,mhaberler/machinekit,cnc-club/linuxcnc,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,kinsamanka/machinekit,EqAfrica/machinekit,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,ArcEye/machinekit-testing,unseenlaser/machinekit,ArcEye/MK-Qt5,ArcEye/MK-Qt5,bmwiedemann/linuxcnc-mirror,ArcEye/machinekit-testing,narogon/linuxcnc,bobvanderlinden/machinekit,ianmcmahon/linuxcnc-mirror,RunningLight/machinekit,unseenlaser/machinekit,ianmcmahon/linuxcnc-mirror,araisrobo/machinekit,ArcEye/machinekit-testing,kinsamanka/machinekit,araisrobo/machinekit,araisrobo/linuxcnc,RunningLight/machinekit,aschiffler/linuxcnc,kinsamanka/machinekit,EqAfrica/machinekit,RunningLight/machinekit,RunningLight/machinekit,strahlex/machinekit,cdsteinkuehler/linuxcnc,narogon/linuxcnc,cdsteinkuehler/linuxcnc,Cid427/machinekit,strahlex/machinekit,narogon/linuxcnc,Cid427/machinekit,strahlex/machinekit,EqAfrica/machinekit,cnc-club/linuxcnc,bobvanderlinden/machinekit,ArcEye/MK-Qt5,EqAfrica/machinekit,RunningLight/machinekit,ikcalB/linuxcnc-mirror,RunningLight/machinekit,araisrobo/machinekit,cdsteinkuehler/linuxcnc,unseenlaser/machinekit,cdsteinkuehler/linuxcnc,EqAfrica/machinekit,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,kinsamanka/machinekit,unseenlaser/linuxcnc,ArcEye/MK-Qt5,bobvanderlinden/machinekit