[vtkusers] vtkOpenGLTexture & power_of_2 resampling

[Schaap, J.A. (LKEB)]

Hi,

Unfortunately OpenGL has the strange restriction for textures that their dimensions have to be a power of 2. The vtkOpenGLTexture checks for that, and if the dimensions of the input-imagedata are not a power of 2, it 
resamples the imagedata. This is of course a nice feature, but it only provides linear interpolation resampling. Would it be possible to extend the vtkOpenGLTexture class with NN-resampling?

Kind regards, Jorrit