(open-file filename "wb")
"ps"))
(paper (ly:paper-book-paper book))
+ (systems (ly:paper-book-systems book))
(page-stencils (map page-stencil (ly:paper-book-pages book)))
(landscape? (eq? (ly:output-def-lookup paper 'landscape) #t))
(page-count (length page-stencils))
(port (ly:outputter-port outputter)))
+ (if (ly:get-option 'dump-signatures)
+ (write-system-signatures basename (ly:paper-book-systems book) 0))
+
(output-scopes scopes fields basename)
(display (file-header paper page-count #t) port)