[vtkusers] Re: VTK on HP UX - Fickering and expose events

[Jeff Lee]

I don't have an hp, but I suspect that the flickering is related to 
double-buffering.  I don't believe that unsetting WindowId is the right 
solution.  That being said, did you try temp0->SetParentId((void 
*)dsi_x11->display)?  You passed in the drawable in your example which I 
think is wrong.  Could this be related to your graphics card 
capabilities?  What is the result of rw->GetCapabilities() (look for 
double buffer)?   Mabey you need to upgrade opengl on that system? 
-Jeff

R K Shyam Prakash wrote:

> Hi,
>         I have been trying to run my vtk+java application on HP UX 
> 11.0. Following are my observation.
>  
> I built VTK 4.2 release on HP UX using HP's aCC compiler. But there 
> was lot of flickering while rendering the 3d view to a extent that my 
> application was unusable. So I dug through the VTK mail archives and I 
> found that few python users had similar problems. The work around was 
> to remove the SetWindowId function and replace it with SetParentId. 
> Hence I made the following changes to vtkJavaAwt.h
>  
>                       _ORIGINAL_
> JAWT_X11DrawingSurfaceInfo* dsi_x11;
> dsi_x11 = (JAWT_X11DrawingSurfaceInfo*)dsi->platformInfo;
> temp0->SetDisplayId((void *)dsi_x11->display);
> temp0->SetWindowId((void *)dsi_x11->drawable);
> temp0->SetParentId((void *)dsi_x11->display);
>  
>  
>                         _MODIFIED_
> JAWT_X11DrawingSurfaceInfo* dsi_x11;
> dsi_x11 = (JAWT_X11DrawingSurfaceInfo*)dsi->platformInfo;
> temp0->SetDisplayId((void *)dsi_x11->display);
> //temp0->SetWindowId((void *)dsi_x11->drawable);
> temp0->SetParentId((void *)dsi_x11->drawable);
>  
> I could build the code with this modification and the welcome relief 
> was that there was no flickering with this set of binaries. But I have 
> a new problem now. When ever my application regains focus after being 
> overlapped by some other window, the vtkCanvas does not get repainted 
> (it remains black). It will remain in this state until a mouseClick or 
> mousePress event is invoked on it. So I added WindowStateListener to 
> my JFrame and forcefully called Render() on vtkCanvas whenever my 
> application regained focus. The result was some what satisfactory. Now 
> I have a new problem. Suppose through my application I invoke a dialog 
> which contains a vtkCanvas, when the dialog is disposed my application 
> freezes with a black 3d window.
>  
> I tried TestInternalFrames demo program and when I moved one internal 
> frame over another the application froze.
>  
> Is anybody using vtk with java on HP UX? Can you please help me. My 
> application developent is totally hampered by this problem and despite 
> my best efforts I have not been able to get a workaround.
>  
> Thanks
> Shyam
>  
>  
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