X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Foutput-svg.scm;fp=scm%2Foutput-svg.scm;h=3132175414123ef86d6f360eccbe8f6296cc99f5;hb=e90f0536f9be39ada0bef0aeb0d275dec3b2fb5b;hp=716f0f13559aa794d6e96da97f93ca4c98dc3d57;hpb=a8c9e8a7ca320ab0df5fd32e717fd62cd7635ce6;p=lilypond.git

diff --git a/scm/output-svg.scm b/scm/output-svg.scm
index 716f0f1355..3132175414 100644
--- a/scm/output-svg.scm
+++ b/scm/output-svg.scm
@@ -1,54 +1,61 @@
-;;;; output-svg.scm -- implement Scheme output routines for SVG1
+;;;; This file is part of LilyPond, the GNU music typesetter.
 ;;;;
-;;;;  source file of the GNU LilyPond music typesetter
+;;;; Copyright (C) 2002--2011 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;;                Patrick McCarty <pnorcks@gmail.com>
 ;;;;
-;;;; (c) 2002--2009 Jan Nieuwenhuizen <janneke@gnu.org>
-
-;;;; http://www.w3.org/TR/SVG11
-;;;; http://www.w3.org/TR/SVG12/ -- page, pageSet in draft
-
-;;;; TODO:
-;;;;  * .cff MUST NOT be in fc's fontpath.
-;;;;    - workaround: remove mf/out from ~/.fonts.conf,
-;;;;      instead add ~/.fonts and symlink all /mf/out/*otf there.
-;;;;    - bug in fontconfig/freetype/pango?
-
-;;;;  * inkscape page/pageSet support
-;;;;  * inkscape SVG-font support
-;;;;    - use fontconfig/fc-cache for now, see output-gnome.scm
+;;;; LilyPond is free software: you can redistribute it and/or modify
+;;;; it under the terms of the GNU General Public License as published by
+;;;; the Free Software Foundation, either version 3 of the License, or
+;;;; (at your option) any later version.
+;;;;
+;;;; LilyPond is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;;; GNU General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (scm output-svg))
 (define this-module (current-module))
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; globals
+
+;;; set by framework-gnome.scm
+(define paper #f)
+  
 (use-modules
- (guile)
- (ice-9 regex)
- (ice-9 format)
- (lily)
- (srfi srfi-1)
- (srfi srfi-13))
+  (guile)
+  (ice-9 regex)
+  (ice-9 format)
+  (ice-9 optargs)
+  (lily)
+  (srfi srfi-1)
+  (srfi srfi-13))
 
 (define fancy-format format)
 (define format ergonomic-simple-format)
 
-(define lily-unit-length 1.75)
+(define lily-unit-length 1.7573)
 
 (define (dispatch expr)
   (let ((keyword (car expr)))
-    (cond
-     ((eq? keyword 'some-func) "")
-     ;;((eq? keyword 'placebox) (dispatch (cadddr expr)))
-     (else
-      (if (module-defined? this-module keyword)
-	  (apply (eval keyword this-module) (cdr expr))
-	  (begin
-	    (ly:warning (_ "undefined: ~S") keyword)
-	    ""))))))
+    (cond ((eq? keyword 'some-func) "")
+	  (else (if (module-defined? this-module keyword)
+		    (apply (eval keyword this-module) (cdr expr))
+		    (begin (ly:warning (_ "undefined: ~S") keyword)
+			   ""))))))
 
 ;; Helper functions
 (define-public (attributes attributes-alist)
   (apply string-append
-	 (map (lambda (x) (format " ~s=\"~a\"" (car x) (cdr x)))
+	 (map (lambda (x)
+		(let ((attr (car x))
+		      (value (cdr x)))
+		  (if (number? value)
+		      (set! value (ly:format "~4f" value)))
+		  (format " ~s=\"~a\"" attr value)))
 	      attributes-alist)))
 
 (define-public (eo entity . attributes-alist)
@@ -56,43 +63,43 @@
   (format "<~S~a>\n" entity (attributes attributes-alist)))
 
 (define-public (eoc entity . attributes-alist)
-  " oc = open/close"
+  "oc = open/close"
   (format "<~S~a/>\n" entity (attributes attributes-alist)))
 
 (define-public (ec entity)
   "c = close"
   (format "</~S>\n" entity))
 
-
+(define-public (comment s)
+  (string-append "<!-- " s " -->\n"))
 
 (define-public (entity entity string . attributes-alist)
   (if (equal? string "")
       (apply eoc entity attributes-alist)
       (string-append
-       (apply eo (cons entity attributes-alist)) string (ec entity))))
+	(apply eo (cons entity attributes-alist)) string (ec entity))))
 
 (define (offset->point o)
-  (format " ~S,~S" (car o)  (- (cdr o))))
+  (ly:format "~4f ~4f" (car o) (- (cdr o))))
 
 (define (number-list->point lst)
   (define (helper lst)
     (if (null? lst)
 	'()
-	(cons (format "~S,~S" (car lst) (cadr lst))
+	(cons (format "~S ~S" (car lst) (- (cadr lst)))
 	      (helper (cddr lst)))))
 
-  (string-join (helper lst) " "))  
+  (string-join (helper lst) " "))
 
 
 (define (svg-bezier lst close)
   (let* ((c0 (car (list-tail lst 3)))
 	 (c123 (list-head lst 3)))
     (string-append
-     (if (not close) "M " "L ")
-     (offset->point c0)
-     "C " (apply string-append (map offset->point c123))
-     (if (not close) "" (string-append
-			 "L " (offset->point close))))))
+      (if (not close) "M" "L")
+      (offset->point c0)
+      "C" (string-join (map offset->point c123) " ")
+      (if (not close) "" "z"))))
 
 (define (sqr x)
   (* x x))
@@ -107,102 +114,217 @@
   (apply string-append
 	 (map (lambda (x) (char->entity x)) (string->list string))))
 
+(define svg-element-regexp
+  (make-regexp "^(<[a-z]+) ?(.*>)"))
+
+(define scaled-element-regexp
+  (make-regexp "^(<[a-z]+ transform=\")(scale.[-0-9. ]+,[-0-9. ]+.\" .*>)"))
+
 (define pango-description-regexp-comma
-  (make-regexp "([^,]+), ?([-a-zA-Z_]*) ([0-9.]+)$"))
+  (make-regexp ",( Bold)?( Italic)?( Small-Caps)?[ -]([0-9.]+)$"))
 
 (define pango-description-regexp-nocomma
-  (make-regexp "([^ ]+) ([-a-zA-Z_]*) ?([0-9.]+)$"))
+  (make-regexp "( Bold)?( Italic)?( Small-Caps)?[ -]([0-9.]+)$"))
 
-(define (pango-description-to-svg-font str)
-  (let*
-      ((size 4.0)
-       (family "Helvetica")
-       (style #f)
-       (match-1 (regexp-exec pango-description-regexp-comma str))
-       (match-2 (regexp-exec pango-description-regexp-nocomma str))
-       (match (if match-1
-		  match-1
-		  match-2)))
+(define (pango-description-to-text str expr)
+  (define alist '())
+  (define (set-attribute attr val)
+    (set! alist (assoc-set! alist attr val)))
+  (let* ((match-1 (regexp-exec pango-description-regexp-comma str))
+	 (match-2 (regexp-exec pango-description-regexp-nocomma str))
+	 (match (if match-1 match-1 match-2)))
 
     (if (regexp-match? match)
 	(begin
-	  (set! family (match:substring match 1))
-	  (if (< 0 (string-length (match:substring match 2)))
-	      (set! style (match:substring match 2)))
-	  (set! size
-		(string->number (match:substring match 3))))
-
+	  (set-attribute 'font-family (match:prefix match))
+	  (if (string? (match:substring match 1))
+	      (set-attribute 'font-weight "bold"))
+	  (if (string? (match:substring match 2))
+	      (set-attribute 'font-style "italic"))
+	  (if (string? (match:substring match 3))
+	      (set-attribute 'font-variant "small-caps"))
+	  (set-attribute 'font-size
+			 (/ (string->number (match:substring match 4))
+			    lily-unit-length))
+	  (set-attribute 'text-anchor "start")
+	  (set-attribute 'fill "currentColor"))
 	(ly:warning (_ "cannot decypher Pango description: ~a") str))
 
-    (set! style
-	  (if (string? style)
-	      (format "font-style:~a;" style)
-	      ""))
-    
-    (format "font-family:~a;~afont-size:~a;text-anchor:west"
-	    family
-	    style
-	    (/ size lily-unit-length))
-    ))
-
-;;; FONT may be font smob, or pango font string
-(define (svg-font font)
-  (if (string? font)
-      (pango-description-to-svg-font font)
-      (let ((name-style (font-name-style font))
-	    (size (modified-font-metric-font-scaling font))
-	    (anchor "west"))
-
-	(format "font-family:~a;font-style:~a;font-size:~a;text-anchor:~a;"
-		(car name-style) (cadr name-style)
-		size anchor))))
+    (apply entity 'text expr (reverse! alist))))
+
+(define (dump-path path scale . rest)
+  (define alist '())
+  (define (set-attribute attr val)
+    (set! alist (assoc-set! alist attr val)))
+  (if (not (null? rest))
+      (let* ((dx (car rest))
+	     (dy (cadr rest))
+	     (total-x (+ dx next-horiz-adv)))
+	(if (or (not (zero? total-x))
+		(not (zero? dy)))
+	    (let ((x (ly:format "~4f" total-x))
+		  (y (ly:format "~4f" dy)))
+	      (set-attribute 'transform
+			     (string-append
+			       "translate(" x ", " y ") "
+			       "scale(" scale ", -" scale ")")))
+	    (set-attribute 'transform
+			   (string-append
+			     "scale(" scale ", -" scale ")"))))
+      (set-attribute 'transform (string-append
+				  "scale(" scale ", -" scale ")")))
+
+  (set-attribute 'd path)
+  (set-attribute 'fill "currentColor")
+  (apply entity 'path "" (reverse alist)))
+
+
+;; A global variable for keeping track of the *cumulative*
+;; horizontal advance for glyph strings, but only if there
+;; is more than one glyph.
+(define next-horiz-adv 0.0)
+
+;; Matches the required "unicode" attribute from <glyph>
+(define glyph-unicode-value-regexp
+  (make-regexp "unicode=\"([^\"]+)\""))
+
+;; Matches the optional path data from <glyph>
+(define glyph-path-regexp
+  (make-regexp "d=\"([-MmZzLlHhVvCcSsQqTt0-9.\n ]*)\""))
+
+;; Matches a complete <glyph> element with the glyph-name
+;; attribute value of NAME.  For example:
+;;
+;; <glyph glyph-name="period" unicode="." horiz-adv-x="110"
+;; d="M0 55c0 30 25 55 55 55s55 -25 55
+;; -55s-25 -55 -55 -55s-55 25 -55 55z" />
+;;
+;; TODO: it would be better to use an XML library to extract
+;; the glyphs instead, and store them in a hash table.  --pmccarty
+;;
+(define (glyph-element-regexp name)
+  (make-regexp (string-append "<glyph"
+			      "(([[:space:]]+[-a-z]+=\"[^\"]*\")+)?"
+			      "[[:space:]]+glyph-name=\"("
+			      name
+			      ")\""
+			      "(([[:space:]]+[-a-z]+=\"[^\"]*\")+)?"
+			      "([[:space:]]+)?"
+			      "/>")))
+
+(define (extract-glyph all-glyphs name size . rest)
+  (let* ((new-name (regexp-quote name))
+	 (regexp (regexp-exec (glyph-element-regexp new-name) all-glyphs))
+	 (glyph (match:substring regexp))
+	 (unicode-attr (regexp-exec glyph-unicode-value-regexp glyph))
+	 (unicode-attr-value (match:substring unicode-attr 1))
+	 (unicode-attr? (regexp-match? unicode-attr))
+	 (d-attr (regexp-exec glyph-path-regexp glyph))
+	 (d-attr-value "")
+	 (d-attr? (regexp-match? d-attr))
+	 ;; TODO: not urgent, but do not hardcode this value
+	 (units-per-em 1000)
+	 (font-scale (ly:format "~4f" (/ size units-per-em)))
+	 (path ""))
+
+    (if (and unicode-attr? (not unicode-attr-value))
+	(ly:warning (_ "Glyph must have a unicode value")))
+
+    (if d-attr? (set! d-attr-value (match:substring d-attr 1)))
+
+    (cond (
+	   ;; Glyph-strings with path data
+	   (and d-attr? (not (null? rest)))
+	   (begin
+	     (set! path (apply dump-path d-attr-value
+					 font-scale
+					 (list (cadr rest) (caddr rest))))
+	     (set! next-horiz-adv (+ next-horiz-adv
+				     (car rest)))
+	     path))
+	  ;; Glyph-strings without path data ("space")
+	  ((and (not d-attr?) (not (null? rest)))
+	   (begin
+	     (set! next-horiz-adv (+ next-horiz-adv
+				     (car rest)))
+	     ""))
+	  ;; Font smobs with path data
+	  ((and d-attr? (null? rest))
+	    (set! path (dump-path d-attr-value font-scale))
+	    path)
+	  ;; Font smobs without path data ("space")
+	  (else
+	    ""))))
+
+(define (extract-glyph-info all-glyphs glyph size)
+  (let* ((offsets (list-head glyph 3))
+	 (glyph-name (car (reverse glyph))))
+    (apply extract-glyph all-glyphs glyph-name size offsets)))
+
+(define (svg-defs svg-font)
+  (let ((start (string-contains svg-font "<defs>"))
+	(end (string-contains svg-font "</defs>")))
+    (substring svg-font (+ start 7) (- end 1))))
+
+(define (cache-font svg-font size glyph)
+  (let ((all-glyphs (svg-defs (cached-file-contents svg-font))))
+    (if (list? glyph)
+	(extract-glyph-info all-glyphs glyph size)
+	(extract-glyph all-glyphs glyph size))))
+
+
+(define (music-string-to-path font size glyph)
+  (let* ((name-style (font-name-style font))
+	 (scaled-size (/ size lily-unit-length))
+	 (font-file (ly:find-file (string-append name-style ".svg"))))
+
+    (if font-file
+	(cache-font font-file scaled-size glyph)
+	(ly:warning (_ "cannot find SVG font ~S") font-file))))
+
+
+(define (font-smob-to-path font glyph)
+  (let* ((name-style (font-name-style font))
+	 (scaled-size (modified-font-metric-font-scaling font))
+	 (font-file (ly:find-file (string-append name-style ".svg"))))
+
+    (if font-file
+	(cache-font font-file scaled-size glyph)
+	(ly:warning (_ "cannot find SVG font ~S") font-file))))
+
+(define (woff-font-smob-to-text font expr)
+  (let* ((name-style (font-name-style font))
+	 (scaled-size (modified-font-metric-font-scaling font))
+	 (font-file (ly:find-file (string-append name-style ".woff")))
+	 (charcode (ly:font-glyph-name-to-charcode font expr))
+	 (char-lookup (format #f "&#~S;" charcode))
+	 (glyph-by-name (eoc 'altglyph `(glyphname . ,expr)))
+	 (apparently-broken
+	  (comment "FIXME: how to select glyph by name, altglyph is broken?"))
+	 (text (string-regexp-substitute "\n" ""
+		(string-append glyph-by-name apparently-broken char-lookup))))
+  (define alist '())
+  (define (set-attribute attr val)
+    (set! alist (assoc-set! alist attr val)))
+  (set-attribute 'font-family name-style)
+  (set-attribute 'font-size scaled-size)
+  (apply entity 'text text (reverse! alist))))
+  
+(define font-smob-to-text
+  (if (not (ly:get-option 'svg-woff))
+      font-smob-to-path woff-font-smob-to-text))
 
 (define (fontify font expr)
-  (entity 'text expr
-	  `(style . ,(svg-font font))
-	  '(fill . "currentColor")
-	  ))
+  (if (string? font)
+      (pango-description-to-text font expr)
+      (font-smob-to-text font expr)))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;; stencil outputters
 ;;;
 
-;;; catch-all for missing stuff
-;;; comment this out to see find out what functions you miss :-)
-
-(if #f
-    (begin
-      (define (dummy . foo) "")
-      (map (lambda (x) (module-define! this-module x dummy))
-	   (append
-	    (ly:all-stencil-expressions)
-	    (ly:all-output-backend-commands)))
-      ))
-
-(define (url-link url x y)
-  (string-append
-   (eo 'a `(xlink:href . ,url))
-   (eoc 'rect
-	`(x . ,(car x))
-	`(y . ,(car y))
-	`(width . ,(- (cdr x) (car x)))
-	`(height . ,(- (cdr y) (car y)))
-	'(fill . "none")
-	'(stroke . "none")
-	'(stroke-width . "0.0"))
-   (ec 'a)))
-
-(define (grob-cause offset grob)
-  "")
-
-(define (no-origin)
-  "")
-
-
-
 (define (bezier-sandwich lst thick)
   (let* ((first (list-tail lst 4))
-	 (first-c0 (car (list-tail first 3)))
 	 (second (list-head lst 4)))
     (entity 'path ""
 	    '(stroke-linejoin . "round")
@@ -211,174 +333,341 @@
 	    '(fill . "currentColor")
 	    `(stroke-width . ,thick)
 	    `(d . ,(string-append (svg-bezier first #f)
-				  (svg-bezier second first-c0)))
-	    )))
+				  (svg-bezier second #t))))))
 
-(define (path thick commands)
-  (define (convert-path-exps exps)
-    (if (pair? exps)
-	(let*
-	    ((head (car exps))
-	     (rest (cdr exps))
-	     (arity 
-	      (cond
-	       ((memq head '(rmoveto rlineto lineto moveto)) 2)
-	       ((memq head '(rcurveto curveto)) 6)
-	       (else 1)))
-	     (args (take rest arity))
-	     (svg-head (assoc-get head '((rmoveto . m)
-					 (rcurveto . c)
-					 (curveto . C)
-					 (moveto . M)
-					 (lineto . L)
-					 (rlineto . l))
-				  ""))
-	     )
-
-	  (cons (format "~a~a "
-			svg-head (number-list->point args)
-			)
-		(convert-path-exps (drop rest arity))))
-	'()))
-  
-  (entity 'path ""
-	  `(stroke-width . ,thick)
-	  '(stroke-linejoin . "round")
-	  '(stroke-linecap . "round")
-	  '(stroke . "currentColor")
-	  '(fill . "none")
-	  `(d . ,(string-join (convert-path-exps commands) " "))))
-  
 (define (char font i)
   (dispatch
    `(fontify ,font ,(entity 'tspan (char->entity (integer->char i))))))
 
-(define-public (comment s)
-  (string-append "<!-- " s " !-->\n"))
+(define (circle radius thick is-filled)
+  (entity
+    'circle ""
+    '(stroke-linejoin . "round")
+    '(stroke-linecap . "round")
+    `(fill . ,(if is-filled "currentColor" "none"))
+    `(stroke . "currentColor")
+    `(stroke-width . ,thick)
+    `(r . ,radius)))
+
+(define (dashed-line thick on off dx dy phase)
+  (draw-line thick 0 0 dx dy
+	     `(stroke-dasharray . ,(format "~a,~a" on off))))
 
 (define (draw-line thick x1 y1 x2 y2 . alist)
-  
   (apply entity 'line ""
 	 (append
-	  `((stroke-linejoin . "round")
-	    (stroke-linecap . "round")
-	    (stroke-width . ,thick)
-	    (stroke . "currentColor")
-	    (x1 . ,x1)
-	    (y1 . ,(- y1))
-	    (x2 . ,x2)
-	    (y2 . ,(- y2)))
-	  alist)))
+	   `((stroke-linejoin . "round")
+	     (stroke-linecap . "round")
+	     (stroke-width . ,thick)
+	     (stroke . "currentColor")
+	     (x1 . ,x1)
+	     (y1 . ,(- y1))
+	     (x2 . ,x2)
+	     (y2 . ,(- y2)))
+	   alist)))
 
-(define (dashed-line thick on off dx dy phase)
-  (draw-line thick 0 0 dx dy `(style . ,(format "stroke-dasharray:~a,~a;" on off))))
+(define (ellipse x-radius y-radius thick is-filled)
+  (entity
+    'ellipse ""
+    '(stroke-linejoin . "round")
+    '(stroke-linecap . "round")
+    `(fill . ,(if is-filled "currentColor" "none"))
+    `(stroke . "currentColor")
+    `(stroke-width . ,thick)
+    `(rx . ,x-radius)
+    `(ry . ,y-radius)))
+
+(define (partial-ellipse x-radius y-radius start-angle end-angle thick connect fill)
+  (define (make-ellipse-radius x-radius y-radius angle)
+    (/ (* x-radius y-radius)
+       (sqrt (+ (* (* y-radius y-radius)
+                   (* (cos angle) (cos angle)))
+                (* (* x-radius x-radius)
+                   (* (sin angle) (sin angle)))))))
+  (let*
+    ((new-start-angle (* PI-OVER-180 (angle-0-360 start-angle)))
+     (start-radius (make-ellipse-radius x-radius y-radius new-start-angle))
+     (new-end-angle (* PI-OVER-180 (angle-0-360 end-angle)))
+     (end-radius (make-ellipse-radius x-radius y-radius new-end-angle))
+     (epsilon 1.5e-3)
+     (x-end (- (* end-radius (cos new-end-angle))
+               (* start-radius (cos new-start-angle))))
+     (y-end (- (* end-radius (sin new-end-angle))
+               (* start-radius (sin new-start-angle)))))
+   (if (and (< (abs x-end) epsilon) (< (abs y-end) epsilon))
+    (entity
+      'ellipse ""
+      `(fill . ,(if fill "currentColor" "none"))
+      `(stroke . "currentColor")
+      `(stroke-width . ,thick)
+      '(stroke-linejoin . "round")
+      '(stroke-linecap . "round")
+      '(cx . 0)
+      '(cy . 0)
+      `(rx . ,x-radius)
+      `(ry . ,y-radius))
+    (entity
+      'path ""
+      `(fill . ,(if fill "currentColor" "none"))
+      `(stroke . "currentColor")
+      `(stroke-width . ,thick)
+      '(stroke-linejoin . "round")
+      '(stroke-linecap . "round")
+      (cons
+        'd
+        (string-append
+          (ly:format
+            "M~4f ~4fA~4f ~4f 0 ~4f 0 ~4f ~4f"
+            (* start-radius (cos new-start-angle))
+            (- (* start-radius (sin new-start-angle)))
+            x-radius
+            y-radius
+            (if (> 0 (- new-start-angle new-end-angle)) 0 1)
+            (* end-radius (cos new-end-angle))
+            (- (* end-radius (sin new-end-angle))))
+            (if connect
+                (ly:format "L~4f,~4f"
+                           (* start-radius (cos new-start-angle))
+                           (- (* start-radius (sin new-start-angle))))
+                "")))))))
+
+(define (embedded-svg string)
+  string)
+
+(define (embedded-glyph-string font size cid glyphs)
+  (define path "")
+  (if (= 1 (length glyphs))
+      (set! path (music-string-to-path font size (car glyphs)))
+      (begin
+	(set! path
+	      (string-append (eo 'g)
+			     (string-join
+			       (map (lambda (x)
+				      (music-string-to-path font size x))
+				    glyphs)
+			       "\n")
+			     (ec 'g)))))
+  (set! next-horiz-adv 0.0)
+  path)
+
+(define (woff-glyph-string font-name size cid? w-x-y-named-glyphs)
+  (let* ((name-style (font-name-style font-name))
+	 (family-designsize (regexp-exec (make-regexp "(.*)-([0-9]*)")
+					 font-name))
+	 (family (if (regexp-match? family-designsize)
+		     (match:substring family-designsize 1)
+		     font-name))
+	 (design-size (if (regexp-match? family-designsize)
+			  (match:substring family-designsize 2)
+			  #f))
+	 (scaled-size (/ size lily-unit-length))
+	 (font (ly:paper-get-font paper `(((font-family . ,family)
+					   ,(if design-size
+						`(design-size . design-size)))))))
+    (define (glyph-spec w x y g)
+      (let* ((charcode (ly:font-glyph-name-to-charcode font g))
+	     (char-lookup (format #f "&#~S;" charcode))
+	     (glyph-by-name (eoc 'altglyph `(glyphname . ,g)))
+	     (apparently-broken
+	      (comment "XFIXME: how to select glyph by name, altglyph is broken?")))
+	;; what is W?
+	(ly:format
+	 "<text~a font-family=\"~a\" font-size=\"~a\">~a</text>"
+	 (if (or (> (abs x) 0.00001)
+		 (> (abs y) 0.00001))
+	     (ly:format " transform=\"translate(~4f,~4f)\"" x y)
+	     " ")
+	 name-style scaled-size
+	 (string-regexp-substitute
+	  "\n" ""
+	  (string-append glyph-by-name apparently-broken char-lookup)))))
+
+    (string-join (map (lambda (x) (apply glyph-spec x))
+		      (reverse w-x-y-named-glyphs)) "\n")))
+
+(define glyph-string
+  (if (not (ly:get-option 'svg-woff)) embedded-glyph-string woff-glyph-string))
+
+(define (grob-cause offset grob)
+  "")
 
 (define (named-glyph font name)
-  (dispatch
-   `(fontify ,font ,(entity 'tspan
-			    (integer->entity
-			     (ly:font-glyph-name-to-charcode font name))))))
+  (dispatch `(fontify ,font ,name)))
+
+(define (no-origin)
+  "")
+
+(define (oval x-radius y-radius thick is-filled)
+  (let ((x-max x-radius)
+	(x-min (- x-radius))
+	(y-max y-radius)
+	(y-min (- y-radius)))
+    (entity
+      'path ""
+      '(stroke-linejoin . "round")
+      '(stroke-linecap . "round")
+      `(fill . ,(if is-filled "currentColor" "none"))
+      `(stroke . "currentColor")
+      `(stroke-width . ,thick)
+      `(d . ,(ly:format "M~4f ~4fC~4f ~4f ~4f ~4f ~4f ~4fS~4f ~4f ~4f ~4fz"
+			x-max 0
+			x-max y-max
+			x-min y-max
+			x-min 0
+			x-max y-min
+			x-max 0)))))
+
+(define* (path thick commands #:optional (cap 'round) (join 'round) (fill? #f))
+  (define (convert-path-exps exps)
+    (if (pair? exps)
+	(let*
+	  ((head (car exps))
+	   (rest (cdr exps))
+	   (arity
+	     (cond ((memq head '(rmoveto rlineto lineto moveto)) 2)
+		   ((memq head '(rcurveto curveto)) 6)
+		   ((eq? head 'closepath) 0)
+		   (else 1)))
+	   (args (take rest arity))
+	   (svg-head (assoc-get head
+				'((rmoveto . m)
+				  (rcurveto . c)
+				  (curveto . C)
+				  (moveto . M)
+				  (lineto . L)
+				  (rlineto . l)
+				  (closepath . z))
+				"")))
+
+	  (cons (format "~a~a" svg-head (number-list->point args))
+		(convert-path-exps (drop rest arity))))
+	'()))
+
+  (let* ((line-cap-styles '(butt round square))
+	 (line-join-styles '(miter round bevel))
+	 (cap-style (if (not (memv cap line-cap-styles))
+			(begin
+			  (ly:warning (_ "unknown line-cap-style: ~S")
+				      (symbol->string cap))
+			  'round)
+			cap))
+	 (join-style (if (not (memv join line-join-styles))
+			 (begin
+			   (ly:warning (_ "unknown line-join-style: ~S")
+				       (symbol->string join))
+			   'round)
+			 join)))
+    (entity 'path ""
+	    `(stroke-width . ,thick)
+	    `(stroke-linejoin . ,(symbol->string join-style))
+	    `(stroke-linecap . ,(symbol->string cap-style))
+	    '(stroke . "currentColor")
+	    `(fill . ,(if fill? "currentColor" "none"))
+	    `(d . ,(apply string-append (convert-path-exps commands))))))
 
 (define (placebox x y expr)
-  (entity 'g
-	  expr
-	  ;; FIXME: Not using GNU coding standards [translate ()] here
-	  ;; to work around a bug in Microsoft Internet Explorer 6.0
-	  `(transform . ,(ly:format "translate(~f, ~f)"
-				 x (- y)))))
+  (if (string-null? expr)
+      ""
+      (let*
+	((normal-element (regexp-exec svg-element-regexp expr))
+	 (scaled-element (regexp-exec scaled-element-regexp expr))
+	 (scaled? (if scaled-element #t #f))
+	 (match (if scaled? scaled-element normal-element))
+	 (string1 (match:substring match 1))
+	 (string2 (match:substring match 2)))
+
+	(if scaled?
+	    (string-append string1
+			   (ly:format "translate(~4f, ~4f) " x (- y))
+			   string2
+			   "\n")
+	    (string-append string1
+			   (ly:format " transform=\"translate(~4f, ~4f)\" "
+				      x (- y))
+			   string2
+			   "\n")))))
 
 (define (polygon coords blot-diameter is-filled)
   (entity
-   'polygon ""
-   '(stroke-linejoin . "round")
-   '(stroke-linecap . "round")
-   `(stroke-width . ,blot-diameter)
-   `(fill . ,(if is-filled "currentColor" "none"))
-   '(stroke . "currentColor")
-   `(points . ,(string-join
-		(map offset->point (ly:list->offsets '() coords))))
-   ))
+    'polygon ""
+    '(stroke-linejoin . "round")
+    '(stroke-linecap . "round")
+    `(stroke-width . ,blot-diameter)
+    `(fill . ,(if is-filled "currentColor" "none"))
+    '(stroke . "currentColor")
+    `(points . ,(string-join
+		  (map offset->point (ly:list->offsets '() coords))))))
+
+(define (repeat-slash width slope thickness)
+  (define (euclidean-length x y)
+    (sqrt (+ (* x x) (* y y))))
+  (let* ((x-width (euclidean-length thickness (/ thickness slope)))
+	 (height (* width slope)))
+    (entity
+      'path ""
+      '(fill . "currentColor")
+      `(d . ,(ly:format "M0 0l~4f 0 ~4f ~4f ~4f 0z"
+			x-width width (- height) (- x-width))))))
 
-;; rotate around given point
-(define (setrotation ang x y)
-  (format "<g transform=\"rotate(~a,~a,~a)\">"
-    (number->string (* -1 ang))
-    (number->string x)
-    (number->string (* -1 y))))
+(define (resetcolor)
+  "</g>\n")
 
 (define (resetrotation ang x y)
-  "</g>")
+  "</g>\n")
 
-(define (round-filled-box breapth width depth height blot-diameter)
-  (entity 'rect ""
-	  ;; The stroke will stick out.  To use stroke,
-	  ;; the stroke-width must be subtracted from all other dimensions.
-	  ;;'(stroke-linejoin . "round")
-	  ;;'(stroke-linecap . "round")
-	  ;;`(stroke-width . ,blot)
-	  ;;'(stroke . "red")
-	  ;;'(fill . "orange")
-
-	  `(x . ,(- breapth))
-	  `(y . ,(- height))
-	  `(width . ,(+ breapth width))
-	  `(height . ,(+ depth height))
-	  `(ry . ,(/ blot-diameter 2))
-	  ))
+(define (resetscale)
+  "</g>\n")
 
-(define (circle radius thick is-filled)
+(define (round-filled-box breapth width depth height blot-diameter)
   (entity
-   'circle ""
-   '(stroke-linejoin . "round")
-   '(stroke-linecap . "round")
-   `(fill . ,(if is-filled "currentColor" "none"))
-   `(stroke . "currentColor")
-   `(stroke-width . ,thick)
-   `(r . ,radius)))
+    'rect ""
+    ;; The stroke will stick out.  To use stroke,
+    ;; the stroke-width must be subtracted from all other dimensions.
+    ;;'(stroke-linejoin . "round")
+    ;;'(stroke-linecap . "round")
+    ;;`(stroke-width . ,blot)
+    ;;'(stroke . "red")
+    ;;'(fill . "orange")
+
+    `(x . ,(- breapth))
+    `(y . ,(- height))
+    `(width . ,(+ breapth width))
+    `(height . ,(+ depth height))
+    `(ry . ,(/ blot-diameter 2))
+    '(fill . "currentColor")))
 
-(define (ellipse x-radius y-radius thick is-filled)
-  (entity
-   'ellipse ""
-   '(stroke-linejoin . "round")
-   '(stroke-linecap . "round")
-   `(fill . ,(if is-filled "currentColor" "none"))
-   `(stroke . "currentColor")
-   `(stroke-width . ,thick)
-   `(rx . ,x-radius)
-   `(ry . ,y-radius)))
+(define (setcolor r g b)
+  (format "<g color=\"rgb(~a%, ~a%, ~a%)\">\n"
+	  (* 100 r) (* 100 g) (* 100 b)))
 
-(define (oval x-radius y-radius thick is-filled)
-  (let ((x-max x-radius)
-        (x-min (- x-radius))
-        (y-max y-radius)
-        (y-min (- y-radius)))
-    (entity
-     'path ""
-     '(stroke-linejoin . "round")
-     '(stroke-linecap . "round")
-     `(fill . ,(if is-filled "currentColor" "none"))
-     `(stroke . "currentColor")
-     `(stroke-width . ,thick)
-     `(d . ,(ly:format "M~4f,~4f C~4f,~4f  ~4f,~4f ~4f,~4f S~4f,~4f ~4f,~4f" 
-               x-max 0
-               x-max y-max
-               x-min y-max
-               x-min 0
-               x-max y-min
-               x-max 0)))))
+;; rotate around given point
+(define (setrotation ang x y)
+  (ly:format "<g transform=\"rotate(~4f, ~4f, ~4f)\">\n"
+	     (- ang) x (- y)))
+
+(define (setscale x y)
+  (ly:format "<g transform=\"scale(~4f, ~4f)\">\n"
+	     x y))
 
 (define (text font string)
   (dispatch `(fontify ,font ,(entity 'tspan (string->entities string)))))
 
-(define (utf-8-string pango-font-description string)
-  (dispatch `(fontify ,pango-font-description ,(entity 'tspan string))))
-
-
-
-(define (setcolor r g b)
-  (format "<g color=\"rgb(~a%,~a%,~a%)\">"
-	  (* 100 r) (* 100 g) (* 100 b)
-	  ))
+(define (url-link url x y)
+  (string-append
+   (eo 'a `(xlink:href . ,url))
+   (eoc 'rect
+	`(x . ,(car x))
+	`(y . ,(car y))
+	`(width . ,(- (cdr x) (car x)))
+	`(height . ,(- (cdr y) (car y)))
+	'(fill . "none")
+	'(stroke . "none")
+	'(stroke-width . "0.0"))
+   (ec 'a)))
 
-(define (resetcolor)
-  "</g>")
+(define (utf-8-string pango-font-description string)
+  (let ((escaped-string (string-regexp-substitute
+			  "<" "&lt;"
+			  (string-regexp-substitute "&" "&amp;" string))))
+    (dispatch `(fontify ,pango-font-description
+			,(entity 'tspan escaped-string)))))