[vtk-developers] vtkOpenGLImageActor and non-power of two image

[Francois Bertel]

Can you post the result of:

$ glxinfo -l

I'm looking for the value of GL_MAX_TEXTURE_SIZE,
if the OpenGL version string is greater than 2.0,
if OpenGL extensions has GL_ARB_texture_non_power_of_two.



On Fri, Oct 3, 2008 at 8:19 AM, Mathieu Malaterre
<mathieu.malaterre at gmail.com> wrote:
> Hi there,
>
>  I'd like to know what is the status of non-power of two image and
> vtkOpenGLImageActor in VTK CVS. I tried using a 2048x2048 16bits
> grayscale image, and vtkOpenGLImageActor seems to be working very
> nicely. However as soon as I have to deal with a 2049x2048 image all
> interaction becomes extraordinarily slow. I am using a Quadro FX
> 4500/PCI/SSE2 with a 2.0.2 NVIDIA 87.76 driver.
>
>  I am confused as to where the problem is coming from. Is this an
> issue in the nvidia driver (it cannot handle the next power of two for
> my image, ie a 4096x2048 image) ? If so how am I supposed work around
> this issue ?
>
> As a side note, is this bug still accurate ?
> http://public.kitware.com/Bug/view.php?id=6450
>
>
> Thanks,
> --
> Mathieu
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François Bertel, PhD  | Kitware Inc. Suite 204
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