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

[Utkarsh Ayachit]

Another way to do the same is this:

https://gitlab.kitware.com/vtk/vtk/blob/master/GUISupport/Qt/Testing/Cxx/TestQVTKOpenGLWidget.cxx#L32-33

On Tue, May 16, 2017 at 11:50 AM, Róbert Špir <spir.robert at gmail.com> wrote:

> 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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