[vtk-developers] [vtkusers] HiDPI not working on VTK 7.1.0 rc2

[Sean McBride]

On Fri, 4 Nov 2016 14:36:56 -0400, Marcus D. Hanwell said:

>On Fri, Nov 4, 2016 at 8:28 AM, Michael Jackson
><mike.jackson at bluequartz.net> wrote:
>> I just tried the HiDPI support on VTK 7.1.0-rc2 and I get the usual VTK
>> rendering canvas that is half the size of the widget that it is embedded
>> into.
>>
>> We are using Qt 5.6.2 on macOS 10.10.5. I compiled my original pull request
>> (way back in Aug 2016) and that patch gives me a full size canvas. But when
>> compiling the latest VTK 7.1.0-rc2 I get the half size canvas. I thought the
>> branch was merged on Sept 28 2016 but I guess I got busy and never actually
>> tested it on a retina screen.
>>
>> Most likely I am doing something wrong in the initialization in my code but
>> just in case can anyone else confirm with Qt 5.6.x that they can actually
>> get a Retina/HiDPI canvas?
>>
>Bob has a retinal Mac that I can do some testing on, this is likely to
>end up being after Supercomputing, but I would like to follow up on
>this. We had it working when you visited, and I am hoping to get this
>enabled in Tomviz at some point soon. It would be great to hear from
>Sean and/or David. To the best of my recollection an alternate
>approach was developed, and that was merged. It had several other
>changes in addition to what was proposed originally.

We merged my PR:
<https://gitlab.kitware.com/vtk/vtk/merge_requests/2019>

and not Mike's:
<https://gitlab.kitware.com/vtk/vtk/merge_requests/1791>

IIRC mine was a superset of Mike's, unless we screwed something up somewhere.  I was always of the view that the changes were necessary but not sufficient.

I'm swamped this week preparing for the SfN conference, but can look more next week...

Cheers,

-- 
____________________________________________________________
Sean McBride, B. Eng                 sean at rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada