activate

Does initial setup before rendering operations on this.

[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.

Parameters: