[vtk-developers] Fractional DPI scaling not supported by QVTKOpenGLWidget?

[Marcus D. Hanwell]

On Mon, Feb 26, 2018 at 5:14 AM, Elvis Stansvik <
elvis.stansvik at orexplore.com> wrote:

> 2018-02-09 16:58 GMT+01:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
> > 2018-02-09 15:24 GMT+01:00 Cory Quammen <cory.quammen at kitware.com>:
> >> Elvis,
> >>
> >> I don't believe there is a reason we can't use the qreal version of
> >> devicePixelRatioF(). I think the F may have gotten dropped in a series
> of
> >> commits to improve DPI support.
> >>
> >> A patch would be welcome.
> >
> > Great, I'll take a stab at it.
>
> Things got in the way, but now there's a WIP MR from me:
>
>     https://gitlab.kitware.com/vtk/vtk/merge_requests/3973
>
> Marcus: I need your advice on
> QVTKInteractorAdapter::SetDevicePixelRatio(...) (see question in the
> MR).
>

Replied in the MR, but this was a bug we were seeing on macOS at the time.
I mentioned it in the commit message, but it would have been helpful to add
a comment in the code. I am not sure if that bug is still relevant, we
don't do a lot of testing on macOS with the combination of retinal and
non-retinal multi-monitor set ups. Maybe that is too niche to worry about
too much too?
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