Sets a set of custom font rendering options for the
Context. Rendering options are derived by merging these
options with the options derived from underlying surface;
if the value in options has a default value (like CAIRO_ANTIALIAS_DEFAULT),
then the value from the surface is used.
Sets a set of custom font rendering options for the Context. Rendering options are derived by merging these options with the options derived from underlying surface; if the value in options has a default value (like CAIRO_ANTIALIAS_DEFAULT), then the value from the surface is used.