Currently Font2DTest renders the text "grid" into a BufferedImage. This is fine if
you are testing software rendering loops, but makes it impossible to test the
accelerated text loops in the OGL and D3D pipelines (without hacking Font2DTest).
We should add an option to Font2DTest to allow rendering the grid directly to the
Swing backbuffer, which would exercise the OGL/D3D codepaths more easily.