void gtk_print_operation_set_use_full_page ( GtkPrintOperation* op, gboolean full_page )
TRUE, the transformation for the cairo context
GtkPrintContext puts the origin at the top left
corner of the page.
This may not be the top left corner of the sheet, depending on page orientation and the number of pages per sheet). Otherwise, the origin is at the top left corner of the imageable area (i.e. inside the margins).