[Paraview] GL2PS for Paraview 3.2.1

[Enkelejda Tafaj]

Hi Sven,

thank you for your help.

I ported your patch for Paraview 3.2.1 and changed the files 
ParaViewCommon.cmake, pqMainWindowCore.cxx and pqRenderView.cxx. The 
last one you will find attached. In the method pqRenderView::saveImage() 
I just added a else if in the file suffix branch.

I compiled Paraview 3.2.1 and tried the GL2PSExporter for an example 
file. Whatever output file suffix I try, Paraview throws the message 
"save image failed". Actually it writes some output in the specified.ps 
or .eps, but the output is not complete. When I try .svg the output 
looks better, but the message still persists.

I don't know what are the differences between PV 3.3 and 3.2.1, maybe 
patching of more files it required... Any idea what would help?

Enkelejda


Sven Buijssen wrote:
> Hi Enkelejda,
> 
>> VTK provides the class vtkGL2PSExporter to export a scene as a 
>> PostScript file using GL2PS. This is also very nice to have in 
>> Paraview, as it writes vector PostScript (PS/EPS), and is thus very 
>> nice for publication pics.
> 
> In August 2007 I posted a patch for the ParaView 3.1.0 source tree 
> adding vector postscript output to Paraview by means of GL2PS. There 
> were no follow-ups to this post on the mailing list, I received a few 
> reactions via personal e-mail. I assume the point of view of the 
> ParaView developers is to not support vector postscript output as many 
> things one can visualise with ParaView can simply not be exported to 
> Postscript with GL2PS. I perfectly understand this argument, in 
> particular as it prevents a lot of bug reports concerning the seemingly 
> broken vector postscript support.
> 
> Nonetheless, I find vector postscript output very useful to have in 
> ParaView (eps format requirements for publications). I ported my patch 
> to the current development distribution (3.3.0, cvs version as of today, 
> QT 4.3.4). It is less well integrated into the code than previously (as 
> the export routines moved from Qt/Core/pqRenderView.cxx to 
> Qt/Core/pqImageUtil.cxx since 3.1.0 and the patch still applies mainly 
> to Qt/Core/pqRenderView.cxx), but it does the job.
> 
> It is not the Plugin approach you pursued, but I hope it helps.
> 
> It is probably a bit too perky to ask for, but it would be great if the 
> patch would make it into the CVS repository, as then there would be a 
> chance that someone with more VTK experience than me would keep it up to 
> date, automatically would disable conflicting drawing options (e.g. 
> "Interpolate Colors") and possibly even add some kind of error handling.
> 
> Sven

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