[vtkusers] QT VTK OpenGL errors
Ken Martin
ken.martin at kitware.com
Tue Nov 1 20:59:55 EDT 2016
What version of VTK are you using? There were some fixes related to that
type of issue a few weeks ago.
Thanks!
Ken
On Tue, Nov 1, 2016 at 8:01 PM, Mike Withascarf via vtkusers <
vtkusers at vtk.org> wrote:
> That's right, the problem only happens if there are more than one
> QVTKWidget.
>
> I've managed to create a fairly simple example to reproduce the problem:
>
> https://drive.google.com/open?id=0BxalkOjn2_PecG5kUUZrN2djMlU
>
> It's a very basic modification of the SideBySideRenderWindowsQt example
> provided by VTK. I've simply added a button, and when it's clicked it will
> clear the left window and add a sphere, then clear the right window and add
> a sphere. If I do the following it produces the OpenGL errors every time
> for me:
>
> 1. Click the button.
> 2. Manually rotate both spheres.
> 3. Click the button.
> 4. Manually rotate both spheres.
> 5. Click the button.
> 6. Manually rotate both spheres. (You'll get the errors here)
>
> Here's the code below. Interestingly if I move both clear calls before
> both of the addsphere calls it works fine. Unfortunately that approach
> won't work for my app (needs to be able to change a single window).
>
>
> #include "SideBySideRenderWindowsQt.h"
>
> void addsphere(vtkSmartPointer<vtkRenderWindow> renwin)
> {
> vtkSmartPointer<vtkSphereSource> sphereSource =
> vtkSmartPointer<vtkSphereSource>::New();
> sphereSource->SetCenter(0.0, 0.0, 0.0);
> sphereSource->SetRadius(5.0);
>
> vtkSmartPointer<vtkPolyDataMapper> mapper =
> vtkSmartPointer<vtkPolyDataMapper>::New();
> mapper->SetInputConnection(sphereSource->GetOutputPort());
>
> vtkSmartPointer<vtkActor> actor =
> vtkSmartPointer<vtkActor>::New();
> actor->SetMapper(mapper);
>
> vtkSmartPointer<vtkRenderer> ren = vtkSmartPointer<vtkRenderer>::
> New();
> ren->AddActor(actor);
> ren->ResetCameraClippingRange();
>
> renwin->AddRenderer(ren);
> renwin->Render();
> }
>
> void clear(vtkSmartPointer<vtkRenderWindow> renwin)
> {
> // clear renderer
> vtkSmartPointer<vtkRenderer> ren =
> renwin->GetRenderers()->GetFirstRenderer();
> if (ren)
> {
> ren->RemoveAllViewProps();
> renwin->Render();
> renwin->RemoveRenderer(ren);
> }
> }
>
> // Constructor
> SideBySideRenderWindowsQt::SideBySideRenderWindowsQt()
> {
> this->setupUi(this);
>
> QObject::connect(b1, SIGNAL(released()), this, SLOT(slot_b1()));
>
> // Set up action signals and slots
> connect(this->actionExit, SIGNAL(triggered()), this, SLOT(slotExit()));
> }
>
> void SideBySideRenderWindowsQt::slot_b1()
> {
> clear(this->qvtkWidgetLeft->GetRenderWindow());
>
> addsphere(this->qvtkWidgetLeft->GetRenderWindow());
> this->qvtkWidgetLeft->GetRenderWindow()->Render();
>
> clear(this->qvtkWidgetRight->GetRenderWindow());
>
> addsphere(this->qvtkWidgetRight->GetRenderWindow());
> this->qvtkWidgetRight->GetRenderWindow()->Render();
> }
>
> void SideBySideRenderWindowsQt::slotExit()
> {
> qApp->exit();
> }
>
>
> ------------------------------
> *From:* Thales Luis Rodrigues Sabino <tluisrs at gmail.com>
> *To:* Mike Withascarf <mikewithascarf at yahoo.com>
> *Cc:* "vtkusers at vtk.org" <vtkusers at vtk.org>
> *Sent:* Tuesday, November 1, 2016 7:19 PM
> *Subject:* Re: [vtkusers] QT VTK OpenGL errors
>
> This looks like an OpenGL resource sharing issue. I don't know exactly how
> VTK handles multiples windows in a Qt application but it looks like it is
> trying to bind a texture that is not registered in a certain context.
>
> Can tell if this happens when you have a single window or this happens
> only when you add a second window?
>
> On Tue, Nov 1, 2016 at 8:15 PM, Mike Withascarf via vtkusers <
> vtkusers at vtk.org> wrote:
>
> I'm using QT with VTK for a fairly complex application. Everything works
> fine
> normally, but if I try to use a function to 'clear' the QVTKWidget, and
> then
> add a new pipeline, I run into lots of OpenGL errors. What would be the
> appropriate way to clear the window/renderer? Here is the code I've been
> trying, where window is of type QVTKWidget:
>
> vtkSmartPointer<vtkRenderer> ren_old =
> window->GetRenderWindow()-> GetRenderers()-> GetFirstRenderer();
> if (ren_old) ren_old->RemoveAllViewProps(); // Remove the pipeline from
> renderer
> if (window->isVisible() && window->GetRenderWindow()-> IsDrawable())
> window->GetRenderWindow()-> Render(); // Update the window so it is blank
> if (ren_old) window->GetRenderWindow()-> RemoveRenderer(ren_old); // Remove
> the renderer
>
>
>
> I'm using multiple QVTKWidgets in one app, and each might have a pipeline
> that connects either with vtkImageViewer2 or a normal vtkRenderer. Here are
> the OpenGL errors reported in the vtkOutputWindow:
>
> ERROR: In C:\vtk\src\Rendering\OpenGL2\ vtkTextureObject.cxx, line 540
> vtkTextureObject (0000029AC7337C70): failed at glBindTexture 1 OpenGL
> errors
> detected
> 0 : (1282) Invalid operation
>
>
> ERROR: In C:\vtk\src\Rendering\OpenGL2\ vtkTextureObject.cxx, line 554
> vtkTextureObject (0000029AC7337C70): failed at glBindTexture(0) 1 OpenGL
> errors detected
> 0 : (1282) Invalid operation
>
>
> ERROR: In C:\vtk\src\Rendering\OpenGL2\ vtkTextureObject.cxx, line 540
> vtkTextureObject (0000029AC7337C70): failed at glBindTexture 1 OpenGL
> errors
> detected
> 0 : (1282) Invalid operation
>
>
> ERROR: In C:\vtk\src\Rendering\OpenGL2\ vtkTextureObject.cxx, line 554
> vtkTextureObject (0000029AC7337C70): failed at glBindTexture(0) 1 OpenGL
> errors detected
> 0 : (1282) Invalid operation
>
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>
>
> --
> Thales Luis Rodrigues Sabino
>
> PhD Student at PGMC-UFJF <http://www.ufjf.br/pgmc/>
> Lattes <http://lattes.cnpq.br/0601030410417146> | LinkedIn
> <https://br.linkedin.com/in/tluisrs> | ResearchGate
> <https://www.researchgate.net/profile/Thales_Luis_Sabino>
>
>
>
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--
Ken Martin PhD
Chairman & CFO
Kitware Inc.
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Clifton Park NY 12065
518 371 3971
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