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List:       vtk-developers
Subject:    Re: [vtk-developers] Slow resize of vtkContextView (on Win 10)
From:       Elvis Stansvik <elvis.stansvik () orexplore ! com>
Date:       2018-08-25 11:06:39
Message-ID: CAE-7VJm_pdT7CBsWOJZ1PsicY+Ecjm5GGoVzR_7=8KLxpu9-ZQ () mail ! gmail ! com
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2018-08-25 13:01 GMT+02:00 Elvis Stansvik <elvis.stansvik@orexplore.com>:
> Hi all,
>
> As I was debugging DPI issues on Windows today, I noticed an unrelated thing.
>
> Resizing a vtkContextView (in this case, containing a vtkChartXY) is
> very (!) slow.
>
> See the following screen recording where I resize the window:
>
>     https://drive.google.com/open?id=1pOKuDjT4IwE54xIRQoYni5-A2PUeZtbL
>
> The recording itself makes it look a little worse than it is, but it's
> not far off from the actual experience.
>
> This was on Win 10, with VTK 8.1.1, OpenGL 2 backend, Qt 5.11.1. The
> vtkContextView was in a QVTKOpenGLWidget.

More info: The computer was a Thinkpad X1 Carbon with Intel UHD Graphics 620.

Elvis

>
> I know that accomplishing smooth resizing of GL windows is
> non-trivial, but should it really be this bad? It makes it impossible
> to build Qt/VTK applications that resize smoothly.
>
> Best regards,
> Elvis
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