2 ;; framework-svg.scm -- structure for SVG output
4 ;;;; source file of the GNU LilyPond music typesetter
6 ;;;; (c) 2004--2006 Jan Nieuwenhuizen <janneke@gnu.org>
8 (define-module (scm framework-svg))
14 (use-modules (srfi srfi-1)
19 (define-public (output-framework basename book scopes fields)
20 (let* ((filename (format "~a.svg" basename))
21 (outputter (ly:make-paper-outputter (open-file filename "wb")
23 (dump (lambda (str) (display str (ly:outputter-port outputter))))
24 (paper (ly:paper-book-paper book))
25 (unit-length (ly:output-def-lookup paper 'outputscale))
26 (output-scale (* lily-unit->mm-factor
28 (pages (ly:paper-book-pages book))
29 (landscape? (eq? (ly:output-def-lookup paper 'landscape) #t))
30 (page-number (1- (ly:output-def-lookup paper 'firstpagenumber)))
31 (page-count (length pages))
32 (hsize (ly:output-def-lookup paper 'hsize))
33 (vsize (ly:output-def-lookup paper 'vsize))
34 (page-width (inexact->exact (ceiling (* output-scale hsize))))
35 (page-height (inexact->exact (ceiling (* output-scale vsize))))
36 (page-set? (or (> page-count 1) landscape?)))
38 (ly:outputter-output-scheme outputter
39 `(begin (set! lily-unit-length ,unit-length) ""))
41 '(xmlns . "http://www.w3.org/2000/svg")
42 '(xmlns:xlink . "http://www.w3.org/1999/xlink")
45 ;; Argggghhhh: SVG takes the px <-> mm mapping from the windowing system
46 `(width . ,(format #f "~s" page-width))
47 `(height . ,(format #f "~s" page-height))))
49 (dump (dump-fonts outputter paper))
52 ;; FIXME: only use pages if there are more than one, pageSet is
53 ;; not supported by all SVG applications yet.
54 (if page-set? (eo 'pageSet) "")
55 (eo 'g `(transform . ,(format "scale(~a, ~a) "
56 output-scale output-scale)))))
60 (set! page-number (1+ page-number))
61 (dump-page outputter page page-number page-count landscape? page-set?))
64 (if page-set? (eo 'pageSet) "")
68 (if page-set? (ec 'pageSet) "")
71 (define (dump-page outputter page page-number page-count landscape? page-set?)
72 (define (dump str) (display str (ly:outputter-port outputter)))
74 (dump (comment (format #f "Page: ~S/~S" page-number page-count)))
75 (if (or landscape? page-set?)
78 (eo 'page '(page-orientation . "270"))
81 (dump (string-append (eo 'g )))
82 (ly:outputter-dump-stencil outputter page)
83 (dump (string-append (ec 'g)))
84 (if (or landscape? page-set?)
87 (define (embed-font string)
88 (let ((start (string-contains string "<defs>"))
89 (end (string-contains string "</defs>")))
90 (substring string (+ start 7) (- end 1))))
92 (define (dump-fonts outputter paper)
93 (let* ((fonts (ly:paper-fonts paper))
94 (font-names (uniq-list (sort
96 (map ly:font-file-name fonts)) string<?)))
99 (let ((file-name (ly:find-file (string-append x ".svg"))))
100 (if file-name (embed-font (cached-file-contents file-name))
101 (begin (ly:warning "cannot find SVG font ~S" x) ""))))
102 (filter string? font-names))))
103 (entity 'defs (string-join svgs "\n"))))