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

[Róbert Špir]

Hi Elvis,
I also tried porting from QVTKWidget to QVTKOpenGLWidget and I had to change
the surfaceformat part to this:

QSurfaceFormat surfaceFormat = QVTKOpenGLWidget::defaultFormat();
surfaceFormat.setSamples(0);
QSurfaceFormat::setDefaultFormat(surfaceFormat);

Otherwise I had black window.

Robert

-----Original Message-----
From: vtk-developers [mailto:vtk-developers-bounces at vtk.org] On Behalf Of
Elvis Stansvik
Sent: Tuesday, May 16, 2017 5:29 PM
To: vtkdev <vtk-developers at vtk.org>
Subject: [vtk-developers] glCopyTexImage2D errors + black windows when
porting QVTKWidget -> QVTKOpenGLWidget

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
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