A Cairo context
An element's id within the SVG, starting with "#" (a single hash character), for example, #layer1. This notation corresponds to a URL's fragment ID. Alternatively, pass NULL to render the whole SVG document tree.
Viewport size in which to fit the element
TRUE on success, FALSE on error. Errors are returned in the error argument.
API ordering: This function must be called on a fully-loaded handle. See the section "API ordering" for details.
Panics: this function will panic if the handle is not fully-loaded.
Renders a single SVG element to a given viewport.
This function can be used to extract individual element subtrees and render them, scaled to a given element_viewport. This is useful for applications which have reusable objects in an SVG and want to render them individually; for example, an SVG full of icons that are meant to be be rendered independently of each other.
Element IDs should look like an URL fragment identifier; for example, pass #foo (hash foo) to get the geometry of the element that has an id="foo" attribute.
You can pass NULL for the id if you want to render all the elements in the SVG, i.e. to render everything from the root element.
The element_viewport gives the position and size at which the named element will be rendered. FIXME: mention proportional scaling.