Rsvg.Handle.render_element

### Method

# Rsvg Handlerender_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.