https://bugs.kde.org/show_bug.cgi?id=383515
Bug ID: 383515
Summary: Invert effect: invert luminosity instead of color
Product: kwin
Version: unspecified
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: wishlist
Priority: NOR
Component: effects-various
Assignee: kwin-bugs-n...@kde.org
Reporter: winsu...@tin.it
Target Milestone: ---
I'm an avid user of the invert effect.
It's really invaluable when you have to switch between bright and dark
environments very often!
It would be great though if it would be possible to invert brightness instead
of color: the overall effect would be similar, but most of the UIs would stay
intelligible (white would become black, but light blue would become dark blue
instead of orange and so on: everything that relies on color would pretty much
keep it's meaning. Pictures would still look bad but probably still easier to
figure out compared to the inverted ones).
As far as I uderstand, this effect could be implemented in a very similar way
to the current one: instead of doing the RGB complement, it should convert to
HSL, invert the luminosity and convert back to RGB.
>From a quick glance to
http://www.niwa.nu/2013/05/math-behind-colorspace-conversions-rgb-hsl , the
convertion shouldn't be too difficult to carry on.
This could have it's independent life as an additional effect, or could be a
configuration option in the current invert effect (I personally believe the
latter option actualy makes more sense though.)
I think I could be able to work out the math and come up with a c++ code
snippet myself, but I got quite confused by the whole KDE development process
with which I have no experience. If someone knows how to properly compile and
test kwin, thinks that implementing this would be a good idea and is willing to
share some of his experience, it would be great to work on it together!
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