get_metrics

Gets overall metric information for a font.

Since the metrics may be substantially different for different scripts, a language tag can be provided to indicate that the metrics should be retrieved that correspond to the script(s) used by that language.

If this is null, this function gracefully sets some sane values in the output variables and returns.

Parameters:

this	a `PangoFont`
language	language tag used to determine which script to get the metrics for, or null to indicate to get the metrics for the entire font.

Returns:

a `PangoFontMetrics` object. The caller must call [method@Pango.FontMetrics.unref] when finished using the object.