- ;; Argggghhhh: SVG takes the px <-> mm mapping from the windowing system
- `(width . ,(format "~s" page-width))
- `(height . ,(format "~s" page-height))))
-
- (dump (dump-fonts outputter paper))
- (dump
- (string-append
- ;; FIXME: only use pages if there are more than one, pageSet is
- ;; not supported by all SVG applications yet.
- (if page-set? (eo 'pageSet) "")
- (eo 'g `(transform . ,(format "scale(~a, ~a) "
- output-scale output-scale)))))
-
- (for-each
- (lambda (page)
- (set! page-number (1+ page-number))
- (dump-page outputter page page-number page-count landscape? page-set?))
- page-stencils)
-
- (if page-set? (eo 'pageSet) "")
- (dump
- (string-append
- (ec 'g)
- (if page-set? (ec 'pageSet) "")
- (ec 'svg)))
-
- (ly:outputter-close outputter)
- ))
+(define (dump-preview paper stencil filename)
+ (let* ((outputter (ly:make-paper-outputter (open-file filename "wb") 'svg))
+ (dump (lambda (str) (display str (ly:outputter-port outputter))))
+ (lookup (lambda (x) (ly:output-def-lookup paper x)))
+ (unit-length (lookup 'output-scale))
+ (x-extent (ly:stencil-extent stencil X))
+ (y-extent (ly:stencil-extent stencil Y))
+ (left-x (car x-extent))
+ (top-y (cdr y-extent))
+ (device-width (interval-length x-extent))
+ (device-height (interval-length y-extent))
+ (output-scale (* lily-unit->mm-factor unit-length))
+ (svg-width (* output-scale device-width))
+ (svg-height (* output-scale device-height)))