[vtk-developers] glCopyTexImage2D errors + black windows when porting QVTKWidget -> QVTKOpenGLWidget

[Elvis Stansvik]

Today I tried porting our application from QVTKWidget to the new
QVTKOpenGLWidget available in VTK master. The application works fine
when running with the old QVTKWidget, but after porting to
QVTKOpenGLWidget I get lots of:

ERROR: In /buildbot/vtk8-builder/build/Rendering/OpenGL2/vtkTextureObject.cxx,
line 2153
vtkTextureObject (0x275acb0): failed at glCopyTexImage2D 6402 1 OpenGL
errors detected
0 : (1282) Invalid operation

and all our render windows appear black.

I followed the advice in the QVTKOpenGLWidget and use

   QSurfaceFormat::setDefaultFormat(QVTKOpenGLWidget::defaultFormat());

before constructing the QApplication, to set the correct surface format.

Does this ring a bell to anyone?

This is with:

  Ubuntu 16.04
  Intel HD Graphics 4400
  VTK master @ 97e306e4cdaab9b7b0b25d73da61e220391156b4

Thanks in advance for any advice. We need to port to QVTKOpenGLWidget
as soon as possible, to get proper support on retina screens.

Cheers,
Elvis