1 ;;;; framework-svg.scm --
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 2004--2005 Jan Nieuwenhuizen <janneke@gnu.org>
7 (define-module (scm framework-svg))
13 (use-modules (srfi srfi-1)
21 (debug-enable 'backtrace)
22 (read-enable 'positions)))
24 (define-public (output-framework basename book scopes fields)
25 (let* ((filename (format "~a.svg" basename))
26 (outputter (ly:make-paper-outputter filename
28 (dump (lambda (str) (display str (ly:outputter-port outputter))))
29 (paper (ly:paper-book-paper book))
30 (unit-length (ly:output-def-lookup paper 'outputscale))
31 (output-scale (* lily-unit->mm-factor
33 (pages (ly:paper-book-pages book))
34 (landscape? (eq? (ly:output-def-lookup paper 'landscape) #t))
35 (page-number (1- (ly:output-def-lookup paper 'firstpagenumber)))
36 (page-count (length pages))
37 (hsize (ly:output-def-lookup paper 'hsize))
38 (vsize (ly:output-def-lookup paper 'vsize))
39 (page-width (inexact->exact (ceiling (* output-scale hsize))))
40 (page-height (inexact->exact (ceiling (* output-scale vsize))))
41 (page-set? (or (> page-count 1) landscape?)))
43 (ly:outputter-output-scheme outputter
44 `(begin (set! lily-unit-length ,unit-length) ""))
46 '(xmlns . "http://www.w3.org/2000/svg")
49 ;; Argggghhhh: SVG takes the px <-> mm mapping from the windowing system
50 `(width . ,(format #f "~s" page-width))
51 `(height . ,(format #f "~s" page-height))))
53 (dump (dump-fonts outputter paper))
56 ;; FIXME: only use pages if there are more than one, pageSet is
57 ;; not supported by all SVG applications yet.
58 (if page-set? (eo 'pageSet) "")
59 (eo 'g `(transform . ,(format "scale(~a,~a)" output-scale output-scale)))))
63 (set! page-number (1+ page-number))
64 (dump-page outputter page page-number page-count landscape? page-set?))
67 (if page-set? (eo 'pageSet) "")
71 (if page-set? (ec 'pageSet) "")
74 (define (dump-page outputter page page-number page-count landscape? page-set?)
75 (define (dump str) (display str (ly:outputter-port outputter)))
77 (dump (comment (format #f "Page: ~S/~S" page-number page-count)))
78 (if (or landscape? page-set?)
81 (eo 'page '(page-orientation . "270"))
84 (dump (string-append (eo 'g)))
85 (ly:outputter-dump-stencil outputter page)
86 (dump (string-append (ec 'g)))
87 (if (or landscape? page-set?)
90 (define (embed-font string)
91 (let ((start (string-contains string "<defs>"))
92 (end (string-contains string "</defs>")))
93 (substring string (+ start 7) (- end 1))))
95 (define (dump-fonts outputter paper)
96 (let* ((fonts (ly:paper-fonts paper))
97 (font-names (uniq-list (sort
99 (map ly:font-file-name fonts)) string<?)))
102 (let ((file-name (ly:find-file (string-append x ".svg"))))
103 (if file-name (embed-font (cached-file-contents file-name))
104 (begin (ly:warn "cannot find SVG font ~S" x) ""))))
105 (filter string? font-names))))
106 (entity 'defs (string-join svgs "\n"))))