Stereo Anaglyph Mode in Perspective View?

I need to check the scene in realtime in anaglyph format in order to optimize the colors, etc.

So, is there a setting, hack or addon that could make perspective view display the scene in anaglyph mode? In particular, in custom anaglyph format (custom filter choice not an arbitrary format like red-blue) and custom interocular distance (the distance between the two cameras).