pfontdesc:SetStyle(style)
The style field describes whether the font is
slanted and the manner in which it is slanted; it can be either
#PANGO_STYLE_NORMAL, #PANGO_STYLE_ITALIC, or #PANGO_STYLE_OBLIQUE.
Most fonts will either have a italic style or an oblique style, but not both, and font matching in Pango will match italic specifications with oblique fonts and vice-versa if an exact match is not found.