[vtkusers] VTK/Java + rendering issue

Thu May 22 18:14:43 EDT 2014

Everything is in VTK 6.

I might push another class that is using vtkPanel but wrap it to provide
the "new" component API soon into VTK/master.

But everything else is already in the previous release 6.1.

Seb

On Thu, May 22, 2014 at 3:26 PM, Alexandre Dufour <adufour at pasteur.fr>wrote:

> Sorry for the lack of clarity,
>
> I was just wondering whether your recent discussion and attempts to
> improve the JOGL interaction is already available in the current official
> VTK 6.x release, and if not when we could expect that, as we have only just
> migrated from VTK 5.10 to 6.1 a few days ago and could wait for something
> more stable if need be.
>
> Alexandre
>
> On 22 mai 2014, at 18:42, Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
> Thanks Alexandre,
>
> and you are right the AWT is not solving the heavy weight part, while JOGL
> can.
> And JOGL is not bad, as long you don't need those features.
>
> I'm not sure to follow which area you are talking about between 5 and 6.
>
> Seb
>
>
> On Thu, May 22, 2014 at 11:34 AM, Alexandre Dufour <adufour at pasteur.fr>wrote:
>
>> Thanks a lot Sebastien for your input, I’m glad Java isn’t left aside!
>>
>> As a quick heads up to our previous discussion on this form, I had been
>> trying the JOGL integration myself (still on VTK 5.x though) and went
>> pretty far, but seeing your post (and self answer), I’m still a bit puzzled
>> by which path to take.
>>
>> When you mention that “On the AWT side, it is better”, I assume that has
>> no positive impact on the lightweight/heavyweight issue, which remains
>> unchanged?
>>
>> Also, has there been any changes from 5.x to 6.x in this particular area?
>>
>> Thanks again for the support!
>> Alexandre
>>
>>   ---
>> Alexandre Dufour, Ph.D.
>> Institut Pasteur - Bio Image Analysis Group
>> 25, rue du Docteur Roux, Paris, France
>> Research: http://www.bioimageanalysis.org/dufour
>> Software: http://icy.bioimageanalysis.org
>>
>> On 22 May 2014, at 18:27, Sebastien Jourdain <
>> sebastien.jourdain at kitware.com> wrote:
>>
>> I guess I'll answer to myself. ;-)
>>
>> So the JOGL render has definitely an issue when VTK tries to read or
>> write into the pixel buffer. And I don't have a solution for that. This
>> must be a JOGL related issue.
>>
>> This mean the following features won't work:
>> - Screen capture (Using VTK code)
>> - Rubber band type of interaction where a rectangle get drawn on top of
>> window.
>> - Volume rendering
>>
>> On the AWT side, it is better. My issue was related to the fact that my
>> Windows system was using its integrated GPU instead of the Nvidia one. Once
>> I changed to use the Nvidia one, everything was fine.
>>
>> Have a great day!
>>
>> Seb
>>
>>
>>
>> On Tue, May 20, 2014 at 9:32 AM, Sebastien Jourdain <
>> sebastien.jourdain at kitware.com> wrote:
>>
>>> Hi everyone,
>>>
>>> I've been working on VTK and its Java wrapping lately.
>>>
>>> Before getting into the details of my issue, I wanted to give you an
>>> update on the work that I've done in the last couple months for you.
>>>
>>> I've started an automated the process to build VTK/Java binaries package
>>> for all the platforms. The full process is not yet polished but you can
>>> already download on our VTK dashboard a compiled version of VTK master
>>> specially packaged for Java.
>>> To get a specific version, just click on the yellow box of the targeted
>>> platform on the following page.
>>>
>>> http://open.cdash.org/index.php?project=VTK
>>>
>>> I've also worked on rendering components based on JOGL to overcome the
>>> rendering issue that was happening on Mac with Java 7+ due to API change
>>> inside the JVM and its management of the windowing system.
>>>
>>> Thanks to the JOGL cross platform support, those classes can be used on
>>> Windows, Mac and Linux.
>>>
>>> The idea behind those classes were to rely on JOGL to create the OpenGL
>>> context and deal with the Java windowing system. So VTK could just focus on
>>> feeding that OpenGL context like we do with Qt.
>>>
>>> The original integration is relying on the capability to "paste" an
>>> overlay native window content into an AWT canvas.
>>>
>>> Both integration works cross platform except the last one on Mac when
>>> using the JVM from Oracle.
>>>
>>> To ease my explanation lets call the 2 rendering/integration technics
>>> with the following names: JOGL and AWT.
>>>
>>> So here are the issues that I've discovered on which I would love to
>>> have some insight.
>>>
>>> Using the JOGL renderer, the rendering is behaving as expected except
>>> when VTK tries to directly interact with the pixel buffer. This happen when
>>> using some rubber band interactor style that aim to draw a dynamic
>>> rectangle inside the window.
>>>
>>> Here is what's happening on each platform:
>>> - OSX: The rectangle does not show but the application still work and
>>> behave as expected.
>>> - Linux: Same as OSX.
>>> - Windows: The rectangle does not show but the application freeze.
>>>
>>> Using the AWT renderer, the rendering is behaving as expected specially
>>> with the rubber band interactor. But when trying to render any 2D actor
>>> (scalarbar, text), those don't even show up on Windows. I still have to see
>>> how it behave on Linux.
>>>
>>> But in the mean time if anyone has any clue on how to handle either
>>> issue, I would love to hear from you.
>>>
>>> Thanks for your help,
>>>
>>> Seb
>>>
>>> PS: I've also tried several JVM options without any success.
>>> => http://www.oracle.com/technetwork/java/javase/java2d-142140.html
>>>
>>>
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