[vtk-developers] volTM2DRotateClip recurring test failures

[Bill Lorensen]

David G,

Looks like the delay did not help. Why not add an alternate Baseline?

Bill

On Wed, Feb 13, 2013 at 1:44 PM, David Cole <dlrdave at aol.com> wrote:
> Is there a call we can add at screen grab time to make sure we're properly
> waiting for all pending/queued output? (Or are we making it already, and
> this is really a symptom of a bad graphics driver...?)
>
>
>
>
>
> -----Original Message-----
> From: David Gobbi <david.gobbi at gmail.com>
> To: Bill Lorensen <bill.lorensen at gmail.com>
> Cc: VTK Developers <vtk-developers at vtk.org>
> Sent: Wed, Feb 13, 2013 1:41 pm
> Subject: Re: [vtk-developers] volTM2DRotateClip recurring test failures
>
> This test has been failing on certain platforms for at least
> five years or so.  The test does a bit of animation, and the
> test harness seems to capture the image at the wrong time,
> i.e. the captured image is not actually the final image shown
> by the test.
>
> Is there any possibility that the image is being captured
> before the final SwapBuffers has taken effect?  I mean,
> if the graphics card has to process all vertexes and fragments
> and then wait for the next vblank before swapping
> the buffers, is it possible that the screen grab might grab
> the screen before the swap has actually taken effect?
> Especially for a test like this that has a huge number of
> textures?
>
>  - David
>
> On Wed, Feb 13, 2013 at 10:29 AM, Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
>> David,
>>
>> Do you have any insight into the recurring test failures (since at
>> least October) for vtkRenderingVolumePython-volTM2DRotateClip.
>> They seem to be on some Macs (3 at this time). See for example:
>> http://open.cdash.org/testDetails.php?test=177122517&build=2810336
>>
>> Do we just need an alternate baseline?
>>
>> Thanks,
>>
>> Bill
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