Output device color curves correction
Summary:
Extends the output device and output configuration interfaces with the
ability
to query and set the RGB color intensity curves (gamma ramps) of the
associated output.
Test Plan: Manually. Auto tests will be added to this diff soon.
Reviewers: Frameworks, graesslin, romangg
Subscribers: kde-frameworks-devel, graesslin, davidedmundson, zzag,
cfeck
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D12388