How to Use blockdiag_fontpath on windows

[cricrazy]

I have blockdiag installed on Windows. The diagrams show up fine, but I cannot modify the font or font size. Can you give me a simple example of it? Currently I am adding it in my rst file.

.. confval:: blockdiag_fontpath=c:\windows\fonts\arial.ttf

I also tried to add in conf.py without any success.

Fontpath for blockdiag (truetype font)

blockdiag_fontpath = 'c:\windows\fonts\arial.ttf'

Here is my content.

Process Chart

.. blockdiag::

blockdiag {
  // set default shape
  default_shape = roundedbox
  orientation=portrait
  default_fontsize = 18
  node_width = 300

  Process1 -> Process2 -> Process3
}

.. confval:: blockdiag_fontpath='c:/windows/fonts/Arial.ttf'
.. confval:: blockdiag_antialias = 1