Issues with QVTKOpenGLWidget and VTK8.2

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Issues with QVTKOpenGLWidget and VTK8.2

VTK - Users mailing list

Hi,

 

We have an application based on Qt and Vtk. It runs well on VTK8.1 However, after upgrading to VTK8.2, we experience problems when we first call vtkRenderer::Render(). This call ultimately ends up calling vtkOpenGLState::CheckState, and this fuction emits a lot of error messages which are listed below.

 

I understand that the vtkOpenGLState is not initialized properly, but I can’t seem to figure out what the proper order of initialization is supposed to be. I am calling QSurfaceFormat::setDefaultFormat() before creating my QApplication object. The render window initialization is pretty straightforward:

 

     _vtkWidget = new QVTKOpenGLWidget((QWidget *)nullptr);

     _vtkWidget->setEnableHiDPI(true);

 

   // VTK Renderer

    _renderer = vtkSmartPointer<vtkRenderer>::New();

    _renderer->SetLayer(0);

 

    _rendererOverlay = vtkSmartPointer<vtkRenderer>::New();

    _rendererOverlay->SetLayer(1);

 

    // VTK/Qt wedded

    vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;

 

    _qvtkWidget>SetRenderWindow(renderWindow);

    renderWindow->SetNumberOfLayers(2);

    renderWindow->AddRenderer(_renderer);

    renderWindow->AddRenderer(_rendererOverlay);

 

The vtkOpenGLState::Initialize function is never called

 

 

I have tried switching from QVTKOpenGLWidget to QVTKOpenGLNativeWidget, which fixes the state initialization problems (but I am unable to use it, since it causes problems with line drawing as documented here: https://gitlab.kitware.com/vtk/vtk/issues/17154).

 

So the code works with 8.1 and also works with QVTKOpenGLNativeWidget.

 

Can someone help me understand what I am doing wrong with the initialization?

 

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 95

Error in cache state for GL_DEPTH_WRITEMASK

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 106

Error in cache state for GL_COLOR_WRITEMASK

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 124

Error in cache state for GL_CULL_FACE

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 131

Error in cache state for GL_MULTISAMPLE

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 144

Error in cache state for GL_STENCIL_TEST

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 162

Error in cache state for GL_VIEWPORT

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 173

Error in cache state for GL_SCISSOR_BOX

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 179

Error in cache state for GL_CULL_FACE_MODE

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 185

Error in cache state for GL_DEPTH_FUNC

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 191

Error in cache state for GL_BLEND_SRC_RGB

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 197

Error in cache state for GL_BLEND_SRC_ALPHA

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 203

Error in cache state for GL_BLEND_DST_RGB

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 209

Error in cache state for GL_BLEND_DST_ALPHA

 

Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate.cxx, line 222

Error in cache state for GL_COLOR_CLEAR_VALUE

 

 

 

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