A second drawback of a pure device is that it does not filter any redundant state changes 纯设备的第二个缺点是它不会滤除任何冗余状态变化。
2.
This trade - off is application dependent ; if you use more than a 1000 set calls per frame , you should consider taking advantage of the redundancy filtering that is done automatically by a non - pure device 是否手动设置是依赖于应用程序的，如果你每帧使用超过1000次状态设置，你应该考虑滤除冗余状态设置，虽然这种操作会在使用非纯设备时会被自动执行。
