[vtkusers] vtkGL2PSExporter in combination with QVTKRenderWindowInteractor

[Stefan Lau]

Allright after a short holiday, I had another few hours to debug the 
issue. But no success.

Some other stuff that I tried (but now I'm out of ideas):
* Installing everything inside a VirtualBox running Ubuntu 14.04 (using 
the Ubuntu-provided
   vtk packages, which are broken btw: 
https://bugs.launchpad.net/ubuntu/+source/vtk6/+bug/1354127)
* Using VTK 6.2 (building my own version of VTK)
* Using OpenGL software rendering (I thought that maybe it's a driver 
issue of the intel drivers)

All yield the same corrupted result: The image that I sent in the last 
email.
I haven't tried running it on a completely different machine, since I 
have none available ATM.
Any ideas on how I could proceed?

- Stefan

Am 29.06.2015 um 16:23 schrieb David Lonie:
> and the attachment...
>
> On Mon, Jun 29, 2015 at 10:22 AM, David Lonie <david.lonie at kitware.com 
> <mailto:david.lonie at kitware.com>> wrote:
>
>     Running the test script works for me -- see attachment, the VTK
>     window is on the right, and the svg rendered in chrome on the left.
>
>     Some other issues that might be coming into play:
>
>     1) What Qt version are you using, and
>     2) Which OpenGL backend is being used on VTK? (Did you explicitly
>     select the experimental OpenGL2 backend while building VTK?)
>
>     Dave
>
>
>     On Mon, Jun 29, 2015 at 8:54 AM, Stefan Lau <github at stefanlau.com
>     <mailto:github at stefanlau.com>> wrote:
>
>         Hi,
>
>         I'm trying to export an image from my application created in
>         PyQt4 to a
>         vector image. While the vtkGL2PSExporter works fine from
>         outside my QT
>         application, when trying to export the image from inside it
>         the output looks corrupted. A minimal example can be found at
>         the end of this email. Did I miss something (or call something
>         incorrectly)? Is this a known issue?
>
>         Version: VTK 6.1.0
>
>         Thanks for any help,
>         Stefan Lau
>
>
>
>         Minimal Example:
>         #!/usr/bin/env python
>
>         import sys
>         import os
>         import vtk
>         from PyQt4 import QtCore, QtGui
>         from vtk.qt4.QVTKRenderWindowInteractor import
>         QVTKRenderWindowInteractor
>
>         class MainWindow(QtGui.QMainWindow):
>
>             def __init__(self, parent = None):
>                 QtGui.QMainWindow.__init__(self, parent)
>
>                 self.frame = QtGui.QFrame()
>
>                 self.vl = QtGui.QVBoxLayout()
>                 self.vtkWidget = QVTKRenderWindowInteractor(self.frame)
>                 self.vl.addWidget(self.vtkWidget)
>
>                 self.ren = vtk.vtkRenderer()
>         self.vtkWidget.GetRenderWindow().AddRenderer(self.ren)
>                 self.iren =
>         self.vtkWidget.GetRenderWindow().GetInteractor()
>
>                 # Create source
>                 source = vtk.vtkSphereSource()
>                 source.SetCenter(0, 0, 0)
>                 source.SetRadius(5.0)
>
>                 # Create a mapper
>                 mapper = vtk.vtkPolyDataMapper()
>         mapper.SetInputConnection(source.GetOutputPort())
>
>                 # Create an actor
>                 actor = vtk.vtkActor()
>                 actor.SetMapper(mapper)
>
>                 button = QtGui.QPushButton(self.frame)
>                 button.setGeometry(20, 20, 32, 32)
>         button.setIcon(QtGui.QIcon.fromTheme('document-save'))
>                 button.setToolTip('Save Visualization')
>
>         button.clicked.connect(self.store_visualization)
>
>                 self.ren.AddActor(actor)
>
>                 self.ren.ResetCamera()
>
>                 self.frame.setLayout(self.vl)
>                 self.setCentralWidget(self.frame)
>
>                 self.show()
>                 self.iren.Initialize()
>
>             def store_visualization(self, render_window):
>                 file_name = str(QtGui.QFileDialog.getSaveFileName(
>                     self,
>                     'Save Visualization',
>                     os.path.join(os.getcwd(), '/visualization.svg'),
>                     'SVG-Images (*.svg)'
>                 ))
>
>                 if len(file_name) > 0:
>                     exporter = vtk.vtkGL2PSExporter()
>         exporter.SetRenderWindow(self.vtkWidget.GetRenderWindow())
>                     exporter.SetFileFormatToSVG()
>                     exporter.CompressOff()
>                     exporter.DrawBackgroundOff()
>         exporter.SetFilePrefix(os.path.splitext(file_name)[0])
>                     exporter.Write()
>
>
>         if __name__ == "__main__":
>             app = QtGui.QApplication(sys.argv)
>             window = MainWindow()
>             sys.exit(app.exec_())
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