pango-layout-line-index-to-x (line index trailing)

iter -- a pango-layout-iter instance
index -- an integer with the byte offset of a grapheme within the layout
trailing -- a boolean indicating the edge of the grapheme to retrieve the position of, if true, the trailing edge of the grapheme, if false, the leading of the grapheme

An integer with the x offset (in Pango unit).

Converts an index within a line to a x position.