Each GL context is used serially, so make the map context-specific. For golang/go#9306 Change-Id: Ic8261795312bf404f765a9ae8969468f4d170dae Reviewed-on: https://go-review.googlesource.com/17772 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Each GL context is used serially, so make the map context-specific. For golang/go#9306 Change-Id: Ic8261795312bf404f765a9ae8969468f4d170dae Reviewed-on: https://go-review.googlesource.com/17772 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>