pango:layout-line-spacing (layout)

layout -- a pango:layout object
factor -- a number coerced to a single float for the new line spacing factor

The pango:layout-line-spacing function gets the value of the line spacing. The (setf pango:layout-line-spacing) function sets a factor for line spacing. Typical values are: 0, 1, 1.5, 2. The default values is 0.

If the factor argument is non-zero, lines are placed so that

baseline2 = baseline1 + factor * height2  

where height2 is the line height of the second line as determined by the font. In this case, the spacing set with the pango:layout-spacing function is ignored.

If the factor argument is zero, spacing is applied as before.

Since 1.44