[vtkusers] Disable texture filtering in renderer?

[Ken Rockot]

Hi,

I'm applying a single 2D texture to an ImagePlaneWidget, and I'm
wondering if VTK provides any generic way to turn off texture
filtering (specifically magnification) in the renderer.  For example,
when using OpenGL one may use the glTexParameter call to set
TEXTURE_MAG_FILTER to GL_NEAREST, so that the texture mapper selects
and renders the nearest texel during mapping, rather than
interpolating between texel values.  It seems that VTK's default
behavior is to apply some linear interpolation when a texture is
magnified.  I'm hoping there is some renderer-independent interface
for changing this behavior.

Thanks,
Ken