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)
18 (define-public (output-framework basename book scopes fields)
19 (let* ((filename (format "~a.svg" basename))
20 (outputter (ly:make-paper-outputter filename
22 (dump (lambda (str) (display str (ly:outputter-port outputter))))
23 (paper (ly:paper-book-paper book))
24 (unit-length (ly:output-def-lookup paper 'outputscale))
25 (output-scale (* lily-unit->mm-factor
27 (pages (ly:paper-book-pages book))
28 (landscape? (eq? (ly:output-def-lookup paper 'landscape) #t))
29 (page-number (1- (ly:output-def-lookup paper 'firstpagenumber)))
30 (page-count (length pages))
31 (hsize (ly:output-def-lookup paper 'hsize))
32 (vsize (ly:output-def-lookup paper 'vsize))
33 (page-width (inexact->exact (ceiling (* output-scale hsize))))
34 (page-height (inexact->exact (ceiling (* output-scale vsize))))
35 (page-set? (or (> page-count 1) landscape?)))
37 (ly:outputter-output-scheme outputter
38 `(begin (set! lily-unit-length ,unit-length) ""))
40 '(xmlns . "http://www.w3.org/2000/svg")
41 '(xmlns:xlink . "http://www.w3.org/1999/xlink")
44 ;; Argggghhhh: SVG takes the px <-> mm mapping from the windowing system
45 `(width . ,(format #f "~s" page-width))
46 `(height . ,(format #f "~s" page-height))))
48 ; (dump (dump-fonts outputter paper))
51 ;; FIXME: only use pages if there are more than one, pageSet is
52 ;; not supported by all SVG applications yet.
53 (if page-set? (eo 'pageSet) "")
54 (eo 'g `(transform . ,(format "scale(~a, ~a) "
55 output-scale output-scale)))))
59 (set! page-number (1+ page-number))
60 (dump-page outputter page page-number page-count landscape? page-set?))
63 (if page-set? (eo 'pageSet) "")
67 (if page-set? (ec 'pageSet) "")
70 (define (dump-page outputter page page-number page-count landscape? page-set?)
71 (define (dump str) (display str (ly:outputter-port outputter)))
73 (dump (comment (format #f "Page: ~S/~S" page-number page-count)))
74 (if (or landscape? page-set?)
77 (eo 'page '(page-orientation . "270"))
80 (dump (string-append (eo 'g )))
81 (ly:outputter-dump-stencil outputter page)
82 (dump (string-append (ec 'g)))
83 (if (or landscape? page-set?)
86 (define (embed-font string)
87 (let ((start (string-contains string "<defs>"))
88 (end (string-contains string "</defs>")))
89 (substring string (+ start 7) (- end 1))))
91 (define (dump-fonts outputter paper)
92 (let* ((fonts (ly:paper-fonts paper))
93 (font-names (uniq-list (sort
95 (map ly:font-file-name fonts)) string<?)))
98 (let ((file-name (ly:find-file (string-append x ".svg"))))
99 (if file-name (embed-font (cached-file-contents file-name))
100 (begin (ly:warning "cannot find SVG font ~S" x) ""))))
101 (filter string? font-names))))
102 (entity 'defs (string-join svgs "\n"))))