If set to %TRUE, the @self will render its contents according to their aspect ratio.
That means that empty space may show up at the top/bottom or left/right of @self.
If set to %FALSE or if the contents provide no aspect ratio, the contents will be stretched over the picture's whole area.
whether to keep aspect ratio
See Implementation
If set to %TRUE, the @self will render its contents according to their aspect ratio.
That means that empty space may show up at the top/bottom or left/right of @self.
If set to %FALSE or if the contents provide no aspect ratio, the contents will be stretched over the picture's whole area.