MantisBT - VTK
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IDProjectCategoryView StatusDate SubmittedLast Update
0011911VTK(No Category)public2011-03-01 08:082016-08-12 09:55
ReporterSergey Slyadnev 
Assigned ToJean-Christophe Fillion-Robin 
PrioritynormalSeverityminorReproducibilityhave not tried
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Project
Type
Summary0011911: vtkXOpenGLRenderWindow: window appears in off-screen rendering mode
DescriptionTests were performed on Red Hat 5.5 (64bit) with VTK 5.6.1.

I've tried to enable the off-screen rendering mode on both Windows & Linux platforms with vtkRenderWindow::SetOffScreenRendering() method. While it works properly on Windows, the blank rendering window is surprisingly displayed on Linux.

Here is my sample code:

==========================================================================
vtkSmartPointer<vtkRenderWindow> aRenderWindow =
  vtkSmartPointer<vtkRenderWindow>::New();
vtkSmartPointer<vtkRenderer> aRenderer =
  vtkSmartPointer<vtkRenderer>::New();
aRenderWindow->AddRenderer(aRenderer);

aRenderWindow->SetOffScreenRendering(1);
aRenderWindow->SetSize(600, 600);

vtkSmartPointer<vtkCamera> aCamera = aRenderer->GetActiveCamera();
aCamera->ParallelProjectionOn();
aCamera->SetPosition(1.0, 1.0, 1.0);
aRenderer->ResetCamera();

vtkSmartPointer<vtkActor> anActor = vtkSmartPointer<vtkActor>::New();
vtkSmartPointer<vtkPolyDataMapper> aMapper =
  vtkSmartPointer<vtkPolyDataMapper>::New();
vtkSmartPointer<vtkSphereSource> aSphereSource =
  vtkSmartPointer<vtkSphereSource>::New();
aMapper->SetInput( aSphereSource->GetOutput() );
anActor->SetMapper(aMapper);
aRenderer->AddActor(anActor);

vtkSmartPointer<vtkPNGWriter> aPNGWriter =
  vtkSmartPointer<vtkPNGWriter>::New();
vtkSmartPointer<vtkWindowToImageFilter> aWinToImageFilter =
  vtkSmartPointer<vtkWindowToImageFilter>::New();

aWinToImageFilter->SetInput(aRenderWindow);
aWinToImageFilter->SetInputBufferTypeToRGB();
aWinToImageFilter->SetMagnification(1);
aWinToImageFilter->ShouldRerenderOn();
aWinToImageFilter->Update();

aPNGWriter->SetInput( aWinToImageFilter->GetOutput() );
aPNGWriter->SetFileName("sphere_output.png");
aPNGWriter->Write();
==========================================================================

It seems like there is a problem in vtkXOpenGLRenderWindow, line 0000643:

=================================================
if(this->OwnWindow)
{
  ...
  XMapWindow(this->DisplayId, this->WindowId);
  ...
=================================================

This code is executed even in the off-screen rendering mode. I've used the following patch to prevent the window from mapping:

=================================================
if(this->OwnWindow !this->OffScreenRendering)
{
  ...
  XMapWindow(this->DisplayId, this->WindowId);
  ...
=================================================

I resolves the problem with the blank window. Do you think it is possible to apply that patch on future versions of VTK?
Steps To Reproduce
Additional Information
TagsNo tags attached.
Relationships
related to 0011912closed Jean-Christophe Fillion-Robin vtkXOpenGLRenderWindow: blank window appears in off-screen rendering mode 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2011-03-01 08:08Sergey SlyadnevNew Issue
2013-06-05 15:56Jean-Christophe Fillion-RobinNote Added: 0030917
2013-06-05 15:56Jean-Christophe Fillion-RobinAssigned To => Jean-Christophe Fillion-Robin
2013-06-05 15:56Jean-Christophe Fillion-RobinStatusbacklog => tabled
2013-06-05 15:59Jean-Christophe Fillion-RobinNote Added: 0030918
2013-06-05 15:59Jean-Christophe Fillion-RobinStatustabled => closed
2013-06-05 15:59Jean-Christophe Fillion-RobinResolutionopen => fixed
2013-06-05 15:59Jean-Christophe Fillion-RobinFixed in Version => 5.10.1
2013-06-05 16:00Jean-Christophe Fillion-RobinNote Edited: 0030918bug_revision_view_page.php?bugnote_id=30918#r614
2013-06-05 16:08Jean-Christophe Fillion-RobinRelationship addedrelated to 0011912
2015-03-16 11:50Clinton StimpsonNote Added: 0034309
2015-03-16 11:50Clinton StimpsonStatusclosed => backlog
2015-03-16 11:50Clinton StimpsonResolutionfixed => reopened
2015-03-16 11:51Clinton StimpsonNote Added: 0034310
2016-07-06 16:47Berk GeveciStatusbacklog => expired
2016-08-12 09:55Kitware RobotNote Added: 0037222
2016-08-12 09:55Kitware RobotStatusexpired => closed
2016-08-12 09:55Kitware RobotFixed in Version5.10.1 =>
2016-08-12 09:55Kitware RobotResolutionreopened => moved

Notes
(0030917)
Jean-Christophe Fillion-Robin   
2013-06-05 15:56   
Updated testcase:

#include <vtkActor2D.h>
#include <vtkCamera.h>
#include <vtkNew.h>
#include <vtkPNGWriter.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkWindowToImageFilter.h>

int main(int, char* [])
{
  vtkNew<vtkRenderWindow> aRenderWindow;
  vtkNew<vtkRenderer> aRenderer;
  aRenderWindow->AddRenderer(aRenderer.GetPointer());

  aRenderWindow->SetOffScreenRendering(1);
  aRenderWindow->SetSize(600, 600);

  vtkSmartPointer<vtkCamera> aCamera = aRenderer->GetActiveCamera();
  aCamera->ParallelProjectionOn();
  aCamera->SetPosition(1.0, 1.0, 1.0);
  aRenderer->ResetCamera();

  vtkNew<vtkActor> anActor;
  vtkNew<vtkPolyDataMapper> aMapper;
  vtkNew<vtkSphereSource> aSphereSource;
  aMapper->SetInputConnection( aSphereSource->GetOutputPort() );
  anActor->SetMapper(aMapper.GetPointer());
  aRenderer->AddActor(anActor.GetPointer());

  vtkNew<vtkPNGWriter> aPNGWriter;
  vtkNew<vtkWindowToImageFilter> aWinToImageFilter;

  aWinToImageFilter->SetInput(aRenderWindow.GetPointer());
  aWinToImageFilter->SetInputBufferTypeToRGB();
  aWinToImageFilter->SetMagnification(1);
  aWinToImageFilter->ShouldRerenderOn();
  aWinToImageFilter->Update();

  aPNGWriter->SetInputConnection( aWinToImageFilter->GetOutputPort() );
  aPNGWriter->SetFileName("sphere_output.png");
  aPNGWriter->Write();

  return 0;
}
(0030918)
Jean-Christophe Fillion-Robin   
2013-06-05 15:59   
(edited on: 2013-06-05 16:00)
Off screen rendering has been tested using VTK 6 (384636ec) and VTK 5.10.1 on Ubuntu 10.04 using the provided testcase and it works as expected.
(0034309)
Clinton Stimpson   
2015-03-16 11:50   
This is not resolved for me. The provided test case using VTK 5.10.1 still pops up a window.

Also, vtkOpenGLExtensionManager directly calls vtkXOpenGLRenderWindow::CreateAWindow().

I do not see a the check for this->OffScreenRendering, before XMapWindow() is called in either 5.10.1 or the master branch.
(0034310)
Clinton Stimpson   
2015-03-16 11:51   
Also, there is a popup window on Mac/Cocoa.
(0037222)
Kitware Robot   
2016-08-12 09:55   
Resolving issue as `moved`.

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