window brightness/contrast/gamma?

These are stuff that some old games which didn’t use shaders allowed to change. So is it possible to set the brightness/contrast/gamma of a Panda window or maybe display regions?

[Gamma correction)

Looks like it changes the gamma of the whole OS. That’s not really what I expected.
Also can’t find a similar thing for brightness and contrast.

It changes the gamma of the monitor. If that’s not what you want, you should emulate the effect using a postprocessing effect.

…or change the light settings if you’re not aiming for a overkill.