[vtkusers] [vtk-developers] Call to Render on WM_PAINT in vtkWin32RenderWindowInteractor

[Xabi Riobe]

Ok, then i will push a patch in GitLab.

however, in vtkRenderWindowInteractor::Render() there is a call to
this->InvokeEvent(vtkCommand::RenderEvent, NULL);

do you think I have to move it
to vtkWin32RenderWindowInteractor::vtkHandleMessage2 where the extra render
was called?
otherwise there is just the StartEvent and EndEvent
of vtkRenderWindow::Render

Also, is it considered as a fix, to put it in the 6.3 branch?


2015-10-23 17:48 GMT+02:00 Ken Martin <ken.martin at kitware.com>:

> No clue why it has a paint, but if everything passes with it removed then
> I think it would be a good fix - Ken
>
>
>
> Ken Martin PhD
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> *From:* vtk-developers [mailto:vtk-developers-bounces at vtk.org] *On Behalf
> Of *Xabi Riobe
> *Sent:* Friday, October 2, 2015 8:43 AM
> *To:* VTK Users; VTK Developers
> *Subject:* [vtk-developers] Call to Render on WM_PAINT in
> vtkWin32RenderWindowInteractor
>
>
>
> Hi,
>
>
>
> Does someone know why in vtkWin32RenderWindowInteractor::vtkHandleMessage2
> there is the Render() call on WM_PAINT:
>
>
>
> case WM_PAINT:
>
>   me->Render();
>
>   return CallWindowProc(me->OldProc,hWnd,uMsg,wParam,lParam);
>
>   break;
>
>
>
> since CallWindowProc will lead to vtkWin32OpenGLRenderWindow::MessageProc
> that performs the rendering on WM_PAINT
>
>
>
> So we have a double rendering that can be slow...
>
>
>
> For example, resize a render window and you can see this happening.
>
>
>
> Thanks for any info about that
>
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