[vtk-developers] volTM2DRotateClip recurring test failures

[David Gobbi]

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