get_ascent

Gets the ascent from a font metrics structure.

The ascent is the distance from the baseline to the logical top of a line of text. (The logical top may be above or below the top of the actual drawn ink. It is necessary to lay out the text to figure where the ink will be.)

Parameters:

this	a `PangoFontMetrics` structure

Returns:

the ascent, in Pango units.