func cfgSurf(ps *C.cairo_surface_t, eps bool, header, setup Comments) {
var ceps C.cairo_bool_t
if eps {
ceps = 1
}
C.cairo_ps_surface_set_eps(ps, ceps)
for _, c := range header {
s := C.CString(c.String())
C.cairo_ps_surface_dsc_comment(ps, s)
C.free(unsafe.Pointer(s))
}
if len(setup) > 0 {
C.cairo_ps_surface_dsc_begin_setup(ps)
for _, c := range setup {
s := C.CString(c.String())
C.cairo_ps_surface_dsc_comment(ps, s)
C.free(unsafe.Pointer(s))
}
}
//ensure calls to AddComments apply to page even if no drawing has been performed.
C.cairo_ps_surface_dsc_begin_page_setup(ps)
}
//AddComments adds comments to the PageSetup sections.
//
//Originally cairo_ps_surface_dsc_comment.
func (s Surface) AddComments(comments Comments) (err error) {
if err = comments.Err(); err != nil {
return
}
for _, c := range comments {
str := C.CString(c.String())
C.cairo_ps_surface_dsc_comment(s.XtensionRaw(), str)
C.free(unsafe.Pointer(str))
}
return s.Err()
}