[ Version ( since = "1.12" ) ]
public void quantize_line_geometry (ref int thickness, ref int position)
Quantizes the thickness and position of a line, typically an underline or strikethrough, to whole device pixels, that is integer multiples of SCALE.
The purpose of this function is to avoid such lines looking blurry.
Care is taken to make sure
thickness is at least one pixel when this function returns, but returned
become zero as a result of rounding.
pointer to the thickness of a line, in Pango units