On Sun, 19 Sep 2021 00:01:51 -0400, Philip Webb wrote:

> Tibor Nagy of KDE Bugzilla has replied very promptly :
> 
>   My guess this happens due to botched gamma handling.
>   Washed out images are a prime symptom of that kind of bugs.
>   Seems like when a PNG gAMA chunk is present,
>   Gwenview applies the gamma transform in the opposite direction it
> should, thus the washed out images.  Seems to be Qt bug, already fixed
> in 5.15.x :
> https://github.com/qt/qtbase/commit/de2c3ccd49cb89e0c6912da3b03705a36ef03946
> 
> As you can see from the link above, some coder forgot to invert a value,
> using 'gamma' when it sb '1/gamma'.
> 
> The patch is dated 'June 11', so it make take awhile yet to reach
> Gentoo.

5.15.2 is already in testing, which explains why I was unable to
reproduce this in the way it hit you, but there was still one washed out
image I saw.


-- 
Neil Bothwick

667 - The FAX number of the beast

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