activate

Does initial setup before rendering operations on @renderer.

method@Pango.Renderer.deactivate should be called when done drawing. Calls such as method@Pango.Renderer.draw_layout automatically activate the layout before drawing on it.

Calls to method@Pango.Renderer.activate and method@Pango.Renderer.deactivate can be nested and the renderer will only be initialized and deinitialized once.