Returns the printer's capabilities.
This is useful when you're using GtkPrintUnixDialog's manual-capabilities
setting and need to know which settings the printer can handle and which
you must handle yourself.
This will return 0 unless the printer's details are available, see
gtk_printer_has_details() and gtk_printer_request_details().
Since 2.12
Returns the printer's capabilities. This is useful when you're using GtkPrintUnixDialog's manual-capabilities setting and need to know which settings the printer can handle and which you must handle yourself. This will return 0 unless the printer's details are available, see gtk_printer_has_details() and gtk_printer_request_details(). Since 2.12