Method

RsvgHandlerender_element

since: 2.46

Declaration [src] 

gboolean
rsvg_handle_render_element (
  RsvgHandle* handle,
  cairo_t* cr,
  const char* id,
  const RsvgRectangle* element_viewport,
  GError** error
)

Description [src]

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.

Available since: 2.46

Parameters

cr

Type: cairo_t

A Cairo context.

The data is owned by the caller of the method.
id

Type: const char*

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.

The argument can be NULL.
The data is owned by the caller of the method.
The value is a NUL terminated UTF-8 string.
element_viewport

Type: RsvgRectangle

Viewport size in which to fit the element.

The data is owned by the caller of the method.
error

Type: GError **

The return location for a recoverable error.

The argument can be NULL.
If the return location is not NULL, then you must initialize it to a NULL GError*.
The argument will be left initialized to NULL by the method if there are no errors.
In case of error, the argument will be set to a newly allocated GError; the caller will take ownership of the data, and be responsible for freeing it.

Return value

Type: gboolean

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.