+(define-class <Font-tree-leaf> (<Font-tree-element>)
+ (default-size #:init-keyword #:default-size)
+ (size-vector #:init-keyword #:size-vector))
+
+(define-class <Font-tree-node> (<Font-tree-element>)
+ (qualifier #:init-keyword #:qualifier #:accessor font-qualifier)
+ (default #:init-keyword #:default #:accessor font-default)
+ (children #:init-keyword #:children #:accessor font-children))
+
+(define (make-font-tree-leaf size size-font-vector)
+ (make <Font-tree-leaf> #:default-size size #:size-vector size-font-vector))
+
+(define (make-font-tree-node
+ qualifier default)
+ (make <Font-tree-node>
+ #:qualifier qualifier
+ #:default default
+ #:children (make-hash-table 11)))
+
+(define-method (display (leaf <Font-tree-leaf>) port)
+ (map (lambda (x) (display x port))
+ (list
+ "Font-size-family: \n"
+ (slot-ref leaf 'default-size)
+ (slot-ref leaf 'size-vector) )))
+
+(define-method (display (node <Font-tree-node>) port)
+
+ (map
+ (lambda (x)
+ (display x port))
+
+ (list
+ "Font_node { \nqual: "
+ (font-qualifier node)
+ "(def: "
+ (font-default node)
+ ") {\n"))
+ (for-each
+ (lambda (x)
+ (display "\n")
+ (display (car x) port)
+ (display "=" port)
+ (display (cdr x) port))
+ (hash-table->alist (font-children node)))
+ (display "} } \n"))
+
+
+(define default-qualifier-order
+ '(font-encoding font-family font-shape font-series))
+
+(define-method (add-font (node <Font-tree-node>) fprops size-family)
+ (define (assoc-delete key alist)
+ (assoc-remove! (list-copy alist) key))
+ (define (make-node fprops size-family)
+ (if (null? fprops)
+ (make-font-tree-leaf (car size-family) (cdr size-family))
+ (let*
+ ((qual (next-qualifier default-qualifier-order fprops)))
+ (make-font-tree-node qual
+ (assoc-get qual fprops)))
+ ))
+ (define (next-qualifier order props)
+ (cond
+ ((and (null? props) (null? order))
+ #f)
+ ((null? props) (car order))
+ ((null? order) (caar props))
+ (else
+ (if (assoc-get (car order) props)
+ (car order)
+ (next-qualifier (cdr order) props))
+ )))
+
+ (let*
+ ((q (font-qualifier node))
+ (d (font-default node))
+ (v (assoc-get q fprops d))
+ (new-fprops (assoc-delete q fprops))
+ (child (hashq-ref (slot-ref node 'children)
+ v #f)))
+
+
+ (if (not child)
+ (begin
+ (set! child (make-node new-fprops size-family))
+ (hashq-set! (slot-ref node 'children) v child)))
+ (if (pair? new-fprops)
+ (add-font child new-fprops size-family))))
+
+
+(define-method (add-font (node <Font-tree-leaf>) fprops size-family)
+ (throw "must add to node, not leaf"))
+
+
+(define-method (g-lookup-font (node <Font-tree-node>) alist-chain)
+ (let*
+ ((qual (font-qualifier node))
+ (def (font-default node))
+ (val (chain-assoc-get qual alist-chain def))
+ (desired-child (hashq-ref (font-children node) val)))
+
+ (if desired-child
+ (g-lookup-font desired-child alist-chain)
+ (g-lookup-font (hashq-ref (font-children node) def) alist-chain)
+ )))
+
+(define-method (g-lookup-font (node <Font-tree-leaf>) alist-chain)
+ node)
+
+;; two step call is handy for debugging.
+(define (lookup-font node alist-chain)
+ (g-lookup-font node alist-chain))
+
+;
+; Each size family is a vector of fonts, loaded with a delay.
+; The vector should be sorted according to ascending design size.
+;
+
+(define-public (add-music-fonts node factor)
+ (for-each
+ (lambda (x)
+ (add-font node
+ (list (cons 'font-encoding (car x)))
+ (cons (* factor (cadr x))
+ (caddr x))))
+ `((fetaNumber 10
+ #(,(delay (ly:font-load "feta-nummer4"))
+ ,(delay (ly:font-load "feta-nummer6"))
+ ,(delay (ly:font-load "feta-nummer8"))
+ ,(delay (ly:font-load "feta-nummer10"))
+ ,(delay (ly:font-load "feta-nummer12"))
+ ,(delay (ly:font-load "feta-nummer16"))))
+ (fetaDynamic 14.0 #(,(delay (ly:font-load "feta-din6"))
+ ,(delay (ly:font-load "feta-din8"))
+ ,(delay (ly:font-load "feta-din10"))
+ ,(delay (ly:font-load "feta-din12"))
+ ,(delay (ly:font-load "feta-din14"))
+ ,(delay (ly:font-load "feta-din17"))
+ ))
+ (fetaMusic 20.0
+ #(,(delay (ly:make-virtual-font
+ (ly:font-load "feta11")
+ (ly:font-load "parmesan11")))
+ ,(delay (ly:make-virtual-font
+ (ly:font-load "feta13")
+ (ly:font-load "parmesan13")))
+ ,(delay (ly:make-virtual-font
+ (ly:font-load "feta14")
+ (ly:font-load "parmesan14")))
+ ,(delay (ly:make-virtual-font
+ (ly:font-load "feta16")
+ (ly:font-load "parmesan16")))
+ ,(delay (ly:make-virtual-font
+ (ly:font-load "feta18")
+ (ly:font-load "parmesan18")))
+ ,(delay (ly:make-virtual-font
+ (ly:font-load "feta20")
+ (ly:font-load "parmesan20")))
+ ,(delay (ly:make-virtual-font
+ (ly:font-load "feta23")
+ (ly:font-load "parmesan23")))
+ ,(delay (ly:make-virtual-font
+ (ly:font-load "feta26")
+ (ly:font-load "parmesan26")))
+ ))
+
+ (fetaBraces 15 #(,(delay
+ (ly:make-virtual-font
+ (ly:font-load "feta-braces-a")
+ (ly:font-load "feta-braces-b")
+ (ly:font-load "feta-braces-c")
+ (ly:font-load "feta-braces-d")
+ (ly:font-load "feta-braces-e")
+ (ly:font-load "feta-braces-f")
+ (ly:font-load "feta-braces-g")
+ (ly:font-load "feta-braces-h")
+ (ly:font-load "feta-braces-i"))
+ ))))))
+
+
+(define-public (add-cmr-fonts node factor)
+ (add-font
+ node
+ '((font-encoding . TeX-math))
+ `(,(* factor 10) . #(,(delay (ly:font-load "msam10")))))
+
+ (for-each
+ (lambda (x)
+ (add-font
+ node
+ `((font-encoding . TeX-text)
+ (font-series . ,(vector-ref (car x) 2))
+ (font-shape . ,(vector-ref (car x) 1))
+ (font-family . ,(vector-ref (car x) 0)))
+ (cons (* factor (cadr x))
+ (cddr x))
+ ))
+ `((#(roman upright medium) .
+ (10.0 . #(,(delay (ly:font-load "cmr6"))
+ ,(delay (ly:font-load "cmr8"))
+ ,(delay (ly:font-load "cmr10"))
+ ,(delay (ly:font-load "cmr17"))
+ )))
+
+ (#(roman upright bold) .
+ (10.0 . #(,(delay (ly:font-load "cmbx6"))
+ ,(delay (ly:font-load "cmbx8"))
+ ,(delay (ly:font-load "cmbx10"))
+ ,(delay (ly:font-load "cmbx12"))
+ )))
+
+ (#(roman italic medium) .
+ (10.0 . #(,(delay (ly:font-load "cmti7"))
+ ,(delay (ly:font-load "cmti10"))
+ ,(delay (ly:font-load "cmti12"))
+ )))
+ (#(roman italic bold) .
+ (10.0 . #(,(delay (ly:font-load "cmbxti8"))
+ ,(delay (ly:font-load "cmbxti10"))
+ ,(delay (ly:font-load "cmbxti14"))
+ )))
+
+ (#(roman caps medium) .
+ (10.0 . #(,(delay (ly:font-load "cmcsc10")))))
+
+ (#(roman upright bold-narrow ) .
+ (10.0 . #(,(delay (ly:font-load "cmb10"))
+ )))
+
+ (#(sans upright medium) .
+ (10.0 . #(,(delay (ly:font-load "cmss8"))
+ ,(delay (ly:font-load "cmss10"))
+ ,(delay (ly:font-load "cmss12"))
+ ,(delay (ly:font-load "cmss17"))
+ )))
+ (#(typewriter upright medium) .
+ (10.0 . #(,(delay (ly:font-load "cmtt8"))
+ ,(delay (ly:font-load "cmtt10"))
+ ,(delay (ly:font-load "cmtt12"))
+ )))))
+
+ ;; lmodern: super-cm using metapost
+ ;; lm.map: Reencoding, at fontlevel for TeX ?:
+ ;; cork-lmb10 LMRomanDemi10-Regular "enccorklm ReEncodeFont" <cork-lm.enc <lmb10.pf
+
+ (for-each
+ (lambda (x)
+ (add-font
+ node
+ `((font-encoding . ec)
+ (font-series . ,(vector-ref (car x) 2))
+ (font-shape . ,(vector-ref (car x) 1))
+ (font-family . ,(vector-ref (car x) 0)))
+ (cons (* factor (cadr x))
+ (cddr x))
+ ))