Returns the scale factor of a matrix on the height of the font.
That is, the scale factor in the direction perpendicular to the
vector that the X coordinate is mapped to. If the scale in the X
coordinate is needed as well, use [method@Pango.Matrix.get_font_scale_factors].
Returns the scale factor of a matrix on the height of the font.
That is, the scale factor in the direction perpendicular to the vector that the X coordinate is mapped to. If the scale in the X coordinate is needed as well, use [method@Pango.Matrix.get_font_scale_factors].