SPDX-License-Identifier: MIT-CMU ]]> Some brightness control mechanisms are somewhat unstable, or require root privileges, so putting them inside of the compositor is not desired. This protocol is for outsourcing the actual brightness-setting to a process outside of the compositor. After creating this object, the client should issue all relevant setup requests (set_internal, set_edid, set_max_brightness) and finish the sequence with commit. Afterwards, for each change in values, the client must call commit again. The client must ensure that if the brightness level changes due to external factors, that it overwrites those changes with what the compositor last requested.