cairo-font-extents-height (extents)

extents -- a cairo-font-extents-t instance

Accessor of the height slot of the cairo-font-extents-t structure.

The recommended vertical distance between baselines when setting consecutive lines of text with the font. This is greater than ascent + descent by a quantity known as the line spacing or external leading. When space is at a premium, most fonts can be set with only a distance of ascent + descent between lines.