get_intrinsic_dimensions

In simple terms, queries the `width`, `height`, and `viewBox` attributes in an SVG document.

If you are calling this function to compute a scaling factor to render the SVG, consider simply using [method@Rsvg.Handle.render_document] instead; it will do the scaling computations automatically.

Before librsvg 2.54.0, the `out_has_width` and `out_has_height` arguments would be set to true or false depending on whether the SVG document actually had `width` and `height` attributes, respectively.

However, since librsvg 2.54.0, `width` and `height` are now [geometry properties](https://www.w3.org/TR/SVG2/geometry.html) per the SVG2 specification; they are not plain attributes. SVG2 made it so that the initial value of those properties is `auto`, which is equivalent to specifing a value of `100%`. In this sense, even SVG documents which lack `width` or `height` attributes semantically have to make them default to `100%`. This is why since librsvg 2.54.0, `out_has_width` and `out_has_heigth` are always returned as `TRUE`, since with SVG2 all documents *have* a default width and height of `100%`.

As an example, the following SVG element has a `width` of 100 pixels and a `height` of 400 pixels, but no `viewBox`. This function will return those sizes in `out_width` and `out_height`, and set `out_has_viewbox` to `FALSE`.

``` <svg xmlns="http://www.w3.org/2000/svg" width="100" height="400"> ```

Conversely, the following element has a `viewBox`, but no `width` or `height`. This function will set `out_has_viewbox` to `TRUE`, and it will also set `out_has_width` and `out_has_height` to `TRUE` but return both length values as `100%`.

``` <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 400"> ```

Note that the `RsvgLength` return values have `RsvgUnits` in them; you should not assume that they are always in pixels. For example, the following SVG element will return width and height values whose `units` fields are `RSVG_UNIT_MM`.

``` <svg xmlns="http://www.w3.org/2000/svg" width="210mm" height="297mm"> ```

API ordering: This function must be called on a fully-loaded this. See the section "[API ordering]( class.Handle.html#api-ordering)" for details.

Panics: this function will panic if the this is not fully-loaded.

Parameters: