[Paraview] [vtk-developers] GPU volume rendering failure on Intel HD XXXX/Iris, Windows and recent drivers

Mon Jul 20 09:21:53 EDT 2015

Hi Simon,

On Mon, Jul 20, 2015 at 5:02 AM, Simon ESNEAULT <simon.esneault at gmail.com>
wrote:

> Hi Aashish,
>
> Thanks for the patchs.
> However, I've tried them but without success, the GPU rendering won't show
> up on an Intel HD chipset using the GPURenderDemo (the same exe/dll works
> fine on a machine with an NVidia/Ati card). The warning disappeared though
> ...
>

The old mapper had issues on some of the ATI cards (specifically on Mac)
and Intel chipset as well. So I am not surprised that it didn't work.

> The proposed patchs seems to affect only the TextureMapper 3D, shouldn't
> there be modification to
> the vtkOpenGLGPUVolumeRayCastMapper::LoadExtensions method as well?
>

That method calls the vtkGL method I believe which I took care of it. I
will have a second look at it today.

>
> I've tried to uncomment all added lines in the GL_VERSION_1_2_DEPRECATED
> part of vtkgl.cxx, build correctly everything, and on the problematic
> machine the checkIfNull() fail for all the lines, the program prints out :
> Function pointer vtkgl::ColorTable is invalid
> Function pointer vtkgl::.. is invalid
> For every one of them.
>
> Also the vtkgl.cxx file is generated by the vtkParseOGLExt exe, shouldn't
> there be modification in the headers glext.h/glxext.h/wglext.h instead ?
> Maybe this is causing some troubles elsewhere...
>

Yes and No. Basically what happened was  that newer drivers stopped
reporting *1_2* variables and that's why you are running into issues. Since
the newer backend uses GLEW, all of this mostly works correctly.

>
> If you have some other magical trick to solve this, I would be glad to
> hear about it! Also I can provide more informations if you want
>

I will have a look at it but even if we can fix all the extension issue,
things may not work on Intel.

- Aashish

>
> Thank You
> Simon
>
>
> 2015-07-17 17:48 GMT+02:00 Aashish Chaudhary <
> aashish.chaudhary at kitware.com>:
>
>> Hi Andras,
>>
>> Please find the patchs attached. If you run into issues let me know. I
>> should mention that apply these patches at your discretion as I have not
>> done enough testing to ensure the quality of the patches but the test
>> passed last time I applied them.
>>
>>
>>
>> On Fri, Jul 17, 2015 at 11:40 AM, Andras Lasso <lasso at queensu.ca> wrote:
>>
>>>  Please share the patch publicly, we would need it for some of our
>>> projects, too. Thank you!
>>>
>>>
>>>
>>> Andras
>>>
>>>
>>>
>>> *From:* vtk-developers [mailto:vtk-developers-bounces at vtk.org] *On
>>> Behalf Of *Simon ESNEAULT
>>> *Sent:* Friday, July 17, 2015 11:35 AM
>>> *To:* Aashish Chaudhary
>>> *Cc:* VTK Developers; vtkusers at vtk.org; ParaView list
>>> *Subject:* Re: [vtk-developers] [Paraview] GPU volume rendering failure
>>> on Intel HD XXXX/Iris, Windows and recent drivers
>>>
>>>
>>>
>>> Dear Aashish,
>>>
>>>
>>>
>>> Thank you very much for you answer.
>>>
>>> Yes you are right, we are waiting for a new VTK release that defaults to
>>> the new OpenGL2 backend, for safety and because a change of VTK version
>>> requires a lot of extra work with our current framework... But the green
>>> dashboard indeed looks really promising, and we will probably make the move
>>> as soon as it's ready !
>>>
>>> Meanwhile, I would be really glad if you could send me the patch that
>>> solves this issue with the old backend, or guide me through the needed
>>> modification to make it work.
>>>
>>> Thanks again
>>>
>>> Simon
>>>
>>>
>>>
>>> 2015-07-17 16:22 GMT+02:00 Aashish Chaudhary <
>>> aashish.chaudhary at kitware.com>:
>>>
>>>  Dear Simon,
>>>
>>>
>>>
>>> On Fri, Jul 17, 2015 at 4:43 AM, Simon ESNEAULT <
>>> simon.esneault at gmail.com> wrote:
>>>
>>>  Hi All,
>>>
>>> We're experiencing GPU volume rendering failure on a lot (maybe all ?)
>>> Intel HD windows system with up to date drivers.
>>>
>>>
>>> This is reproducible in Paraview or with the GPURenderDemo example from
>>> VTK, just load a volume and try to render the volume... Here is a result
>>> image from paraview on a Dell Latitude E7450 (Intel HD 5500 inside), with
>>> GPU rendering [1] and the same volume with CPU VR rendering [2].
>>> Interestingly, the volume rendering used to work with drivers older or
>>> equal to the version 10.18.10.3496 [3]. As a work around, we ask our
>>> customers to downgrade their driver version to this one, and they're
>>> enjoying smooth GPU rendering. But this driver is quite old and does not
>>> support recent chipset...
>>>
>>> I've built and tested the GPURenderDemo with the brand new OpenGL2
>>> backend on an affected machine and of course it does work out of the box
>>> (congratulations for this amazing work !).
>>>
>>>  Great!
>>>
>>>
>>>
>>>  But our application is FDA/CE marked and we need to wait that this new
>>> backend is completely ready for prime time. So for now, we have to stick
>>> with VTK 6.1 ...
>>>
>>>
>>>
>>> Most of the tests are passing for OpenGL2 (
>>> https://open.cdash.org/index.php?project=VTK) on most of the dashboards
>>> (various configurations etc) but it is a moving target just like VTK itself
>>> is a moving target. I guess you are waiting for a VTK release that defaults
>>> to OpenGL2 as oppose to OpenGL?
>>>
>>>
>>> Anyone has any clue ? They're some warning that pop up from paraview
>>> related to the extension "gl_version_1_2" that could not be loaded, not
>>> sure if that could be related ? Following this thread [4] and the fix
>>> proposed, I've tried to replace
>>>
>>> /*****************/
>>>
>>> extensions->LoadExtension("GL_VERSION_1_2")
>>>
>>> /*****************/
>>>
>>> by
>>>
>>> /*****************/
>>>
>>> extensions->LoadExtension("GL_EXT_texture3D");
>>> extensions->LoadExtension( "GL_ARB_texture_non_power_of_two" );
>>>
>>> /*****************/
>>>
>>> in the vtkOpenGLGPUVolumeRayCastMapper.cxx, The warning disappears but
>>> there is still no volume rendering (tested with GPURenderDemo). Maybe it
>>> needs some others extensions ?
>>>
>>>
>>>
>>> Yes, there is a patch and I can send it to you. I have to talk to folks
>>> here if we can fix the old mapper with those changes but as of now it is
>>> not in the plan.
>>>
>>>
>>>
>>>
>>> Should I fill a bug in paraview, vtk ? Are there any plan to maintain
>>> and maybe fix this for the old backend ?
>>>
>>>
>>>
>>> - Aashish
>>>
>>>
>>>
>>>
>>> Thanks,
>>> --
>>>
>>> ------------------------------------------------------------------
>>> Simon Esneault
>>>
>>> Rennes, France
>>> ------------------------------------------------------------------
>>>
>>>
>>> [1] http://picpaste.com/pics/Paraview-4-3-1-GPU-VR_fail.1437122217.PNG
>>>
>>> [2] http://picpaste.com/pics/Paraview-4-3-1-CPU-VR_win.1437122267.PNG
>>>
>>> [3] https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=23339
>>> [4] http://public.kitware.com/pipermail/vtkusers/2014-April/083584.html
>>>
>>>
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>>>
>>>
>>> --
>>>
>>>
>>>
>>> *| Aashish Chaudhary | Technical Leader          | Kitware Inc.
>>>   *
>>>
>>> *| http://www.kitware.com/company/team/chaudhary.html
>>> <http://www.kitware.com/company/team/chaudhary.html>*
>>>
>>>
>>>
>>>
>>>
>>> --
>>>
>>> ------------------------------------------------------------------
>>> Simon Esneault
>>>
>>> Rennes, France
>>> ------------------------------------------------------------------
>>>
>>
>>
>>
>> --
>>
>>
>>
>> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.
>> *
>> *| http://www.kitware.com/company/team/chaudhary.html
>> <http://www.kitware.com/company/team/chaudhary.html>*
>>
>
>
>
> --
> ------------------------------------------------------------------
> Simon Esneault
> Rennes, France
> ------------------------------------------------------------------
>

-- 

*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
*| http://www.kitware.com/company/team/chaudhary.html
<http://www.kitware.com/company/team/chaudhary.html>*
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