Press w, a, s, and d to move the outlined rectangle (to demo easy movement). Currently Renderable: Outlined circle, rectangle, and triangle; Filled circle, rectangle, and triangle; A line
Thanks to @CheeseyCheese100 (Filled Triangle), @raucket (Filled Circle), @gtoal (Filled Rectangle), and especially @-Rex- (Pen Text Engine w/ Bezier Smoothing) Plans: implant text renderer (t_renderer) and shape renderer (s_renderer) into one complete renderer.