-;;;
-;;; font.scm -- implement Font stuff
-;;;
-;;; source file of the GNU LilyPond music typesetter
-;;;
-;;; (c) 2000--2003 Jan Nieuwenhuizen <janneke@gnu.org>
-;;;
-
-(define (font-field name font-descr)
- (list-ref
- font-descr
- (cond
- ((eq? name 'font-relative-size) 0)
- ((eq? name 'font-series) 1)
- ((eq? name 'font-shape) 2)
- ((eq? name 'font-family) 3)
- ((eq? name 'font-design-size) 4)
- (else (ly:warning "unknown font field name"))
- )
- ))
-
-
-(define size-independent-fonts
- `(
- ((* * * braces *) . ("feta-braces00"
- "feta-braces10"
- "feta-braces20"
- "feta-braces30"
- "feta-braces40"
- "feta-braces50"
- "feta-braces60"
- "feta-braces70"
- "feta-braces80") )))
-
-;; FIXME: what about this comment?:
-
-;; font-lookup seems a little inefficient -- walking this entire list
-;; for a single font.
-;;
-;; should really have name/pt size at the front of the list.
-;; (also tried to vary the order of this list, with little effect)
-;;
-;; (font-relative-size font-series font-shape font-family
-;; font-design-size)
-
-(define paper20-style-sheet-alist
- '(
- ;; why are font file names strings, not symbols?
- ((3 medium upright number 13) . "feta-nummer13")
- ((2 medium upright number 13) . "feta-nummer13")
- ((1 medium upright number 11) . "feta-nummer11")
- ((0 medium upright number 10) . "feta-nummer10")
- ((-1 medium upright number 8) . "feta-nummer8")
- ((-2 medium upright number 7) . "feta-nummer7")
- ((-3 medium upright number 6) . "feta-nummer6")
- ((-4 medium upright number 5) . "feta-nummer5")
- ((-5 medium upright number 4) . "feta-nummer4")
-
- ((4 medium upright roman 17) . "cmr17")
- ((3 medium upright roman 17) . "cmr17")
- ((2 medium upright roman 12) . "cmr12")
- ((1 medium upright roman 12) . "cmr12")
- ((0 medium upright roman 10) . "cmr10")
- ((-1 medium upright roman 8) . "cmr8" )
- ((-2 medium upright roman 7) . "cmr7" )
- ((-3 medium upright roman 6) . "cmr6" )
- ((-4 medium upright roman 5) . "cmr5" )
- ((-5 medium upright roman 5) . "cmr5" )
-
- ((4 medium upright sans 17) . "cmss17")
- ((3 medium upright sans 17) . "cmss17")
- ((2 medium upright sans 14) . "cmss14")
- ((1 medium upright sans 12) . "cmss12")
- ((0 medium upright sans 10) . "cmss10")
- ((-1 medium upright sans 9) . "cmss9" )
- ((-2 medium upright sans 8) . "cmss8" )
- ((-3 medium upright sans 7) . "cmss7" )
- ((-3 medium upright sans 6) . "cmss6" )
- ((-4 medium upright sans 5) . "cmss5" )
-
- ((3 medium italic roman 12) . "cmti12")
- ((2 medium italic roman 12) . "cmti12")
- ((1 medium italic roman 12) . "cmti12") ;;; ugh. Should add magnification here!
- ((0 medium italic roman 10) . "cmti10")
- ((-1 medium italic roman 8) . "cmti8")
- ((-2 medium italic roman 7) . "cmti7")
- ((-3 medium italic roman 6) . "cmti6")
- ((-4 medium italic roman 5) . "cmti5")
- ((-5 medium italic roman 5) . "cmti5")
-
- ;;; cmbx17 is sauter, not commonly available as Type1.
- ((4 bold upright roman 17) . "cmbx17")
- ((3 bold upright roman 17) . "cmbx17")
-
- ((2 bold upright roman 14) . "cmbx14")
- ((1 bold upright roman 12) . "cmbx12")
- ((0 bold upright roman 10) . "cmbx10")
- ((-1 bold upright roman 8) . "cmbx8")
- ((-2 bold upright roman 7) . "cmbx7")
- ((-3 bold upright roman 6) . "cmbx6")
- ((-4 bold upright roman 5) . "cmbx5")
- ((-5 bold upright roman 5) . "cmbx5")
-
-
- ((2 bold italic roman 12) . "cmbxti12")
- ((1 bold italic roman 12) . "cmbxti12")
- ((0 bold italic roman 10) . "cmbxti10")
-
- ((-1 bold italic roman 8) . "cmbxti8")
- ((-2 bold italic roman 7) . "cmbxti7")
- ((-3 bold italic roman 6) . "cmbxti6")
- ((-4 bold italic roman 5) . "cmbxti5")
- ((-5 bold italic roman 5) . "cmbxti5")
-
- ((4 medium upright typewriter 17) . "cmtt17")
- ((3 medium upright typewriter 17) . "cmtt17")
- ((2 medium upright typewriter 12) . "cmtt12")
- ((1 medium upright typewriter 12) . "cmtt12")
- ((0 medium upright typewriter 10) . "cmtt10")
- ((-1 medium upright typewriter 8) . "cmtt8" )
- ((-2 medium upright typewriter 7) . "cmtt7" )
- ((-3 medium upright typewriter 6) . "cmtt6" )
- ((-4 medium upright typewriter 5) . "cmtt5" )
- ((-5 medium upright typewriter 5) . "cmtt5" )
-
- ((3 medium caps roman 12) . "cmcsc12")
- ((2 medium caps roman 12) . "cmcsc12")
- ((1 medium caps roman 12) . "cmcsc12")
- ((0 medium caps roman 10) . "cmcsc10")
- ((-1 medium caps roman 8) . "cmcsc8")
- ((-2 medium caps roman 7) . "cmcsc7")
- ((-3 medium caps roman 7) . "cmcsc7")
-
- ((3 * * dynamic 19) . "feta-din19")
- ((2 * * dynamic 19) . "feta-din19")
- ((1 * * dynamic 17) . "feta-din17")
- ((0 * * dynamic 14) . "feta-din14")
- ((-1 * * dynamic 12) . "feta-din12")
- ((-2 * * dynamic 9) . "feta-din9")
- ((-3 * * dynamic 8) . "feta-din8")
- ((-4 * * dynamic 7) . "feta-din7")
- ((-5 * * dynamic 6) . "feta-din6")
-
- ((2 * * music 26) . ("feta26" "parmesan26"))
- ((1 * * music 23) . ("feta23" "parmesan23"))
- ((0 * * music 20) . ("feta20" "parmesan20"))
- ((-1 * * music 16) . ("feta16" "parmesan16"))
- ((-2 * * music 13) . ("feta13" "parmesan13"))
- ((-3 * * music 11) . ("feta11" "parmesan11"))
- ((-4 * * music 11) . ("feta11" "parmesan11"))
-
- ((2 * * ancient 26) . ("feta26" "parmesan26"))
- ((1 * * ancient 23) . ("feta23" "parmesan23"))
- ((0 * * ancient 20) . ("feta20" "parmesan20"))
- ((-1 * * ancient 16) . ("feta16" "parmesan16"))
- ((-2 * * ancient 13) . ("feta13" "parmesan13"))
- ((-3 * * ancient 11) . ("feta11" "parmesan11"))
- ((-4 * * ancient 11) . ("feta11" "parmesan11"))
-
- ((0 * * math 10) . "msam10")
- ((-1 * * math 10) . "msam10")
- ((-2 * * math 10) . "msam10")
- ((-3 * * math 10) . "msam10")
- ))
-
-;;
-(define (change-relative-size font-desc decrement)
- "return a FONT-DESCR with relative size decremented by DECREMENT"
-
- (if (number? (car font-desc))
- (cons (- (car font-desc) decrement) (cdr font-desc))
- font-desc)
- )
-
-(define (change-rhs-size font-desc from to )
- (cons (car font-desc)
- (regexp-substitute/global #f from (cdr font-desc) 'pre to 'post)))
-
-
-(define (change-style-sheet-relative-size sheet x)
- (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
-
-
-;; make style sheet for each paper version.
-(define font-list-alist
- (map-alist-vals (lambda (x) (change-style-sheet-relative-size
- paper20-style-sheet-alist x))
- '((paper11 . -3)
- (paper13 . -2)
- (paper16 . -1)
- (paper20 . 0)
- (paper23 . 1)
- (paper26 . 2)
- )))
+;;;; font.scm -- construct font trees
+;;;;
+;;;; source file of the GNU LilyPond music typesetter
+;;;;
+;;;; (c) 2004--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;; TODO:
;;
-;; make a kludged up paper-19 style sheet. Broken by virtual fonts.
+;; lookup-font should be written in C.
;;
-(if #f
- (set! font-list-alist
- (cons
- (cons
- 'paper19
- (map (lambda (x) (change-rhs-size x "20" "19"))
- paper20-style-sheet-alist))
- font-list-alist)))
-
-(define-public (make-font-list sym)
- (append size-independent-fonts
- (cdr (assoc sym font-list-alist))))
-
-
-;;; ascii-script font init
-(define as-font-sheet-alist
- '((as5 . (((* * * braces *) . ("as-braces9"))
- ((* * * number *) . "as-number1")
- ((0 * * music *) . ("as5"))
- ((0 * * roman *) . "as-dummy")))
- (as9 . (((* * * braces *) . ("as-braces9"))
- ((0 medium upright number 10) . "as-number4")
- ((* * * number 5) . "as-number1")
- ((0 * * music *) . ("as9"))
- ((0 * * roman *) . "as-dummy")))))
-
-(define-public (as-make-font-list sym)
- (set! font-list-alist
- (append font-list-alist as-font-sheet-alist))
- (make-font-list sym))
-
-
-
+(define-class <Font-tree-element>
+ ())
+
+(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))
+
+
+;; Ugh. Currently, we load the PFB Feta fonts for `fetaDynamic' with
+;; Pango. This should be changed to load the Emmentaler fonts instead
+;; (with Pango too), but then we need support for a `font-style'
+;; property which isn't implemented yet.
+(define feta-alphabet-size-vector
+ (list->vector
+ (map (lambda (tup)
+ (cons (ly:pt (cdr tup))
+ (format "feta-alphabet~a ~a"
+ (car tup)
+ (ly:pt (cdr tup)))))
+ '((11 . 11.22)
+ (13 . 12.60)
+ (14 . 14.14)
+ (16 . 15.87)
+ (18 . 17.82)
+ (20 . 20)
+ (23 . 22.45)
+ (26 . 25.20)))))
+
+;; 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))))
+ `((fetaDynamic ,(ly:pt 20.0) ,feta-alphabet-size-vector)
+ (fetaNumber ,(ly:pt 20.0) ,feta-alphabet-size-vector)
+ (fetaMusic ,(ly:pt 20.0)
+ #(,(delay (ly:system-font-load "emmentaler-11"))
+ ,(delay (ly:system-font-load "emmentaler-13"))
+ ,(delay (ly:system-font-load "emmentaler-14"))
+ ,(delay (ly:system-font-load "emmentaler-16"))
+ ,(delay (ly:system-font-load "emmentaler-18"))
+ ,(delay (ly:system-font-load "emmentaler-20"))
+ ,(delay (ly:system-font-load "emmentaler-23"))
+ ,(delay (ly:system-font-load "emmentaler-26"))))
+ (fetaBraces ,(ly:pt 20.0)
+ #(,(delay (ly:system-font-load "aybabtu")))))))
+
+(define-public (add-pango-fonts node lily-family family factor)
+ (define (add-node shape series)
+ (add-font node
+ `((font-family . ,lily-family)
+ (font-shape . ,shape)
+ (font-series . ,series)
+ (font-encoding . latin1) ;; ugh.
+ )
+ `(,(ly:pt (* factor 11.0))
+ . #(,(cons
+ (ly:pt 12)
+ (ly:make-pango-description-string
+ `(((font-family . ,family)
+ (font-series . ,series)
+ (font-shape . ,shape)))
+ (ly:pt 12)))))))
+
+ (add-node 'upright 'normal)
+ (add-node 'caps 'normal)
+ (add-node 'upright 'bold)
+ (add-node 'italic 'normal)
+ (add-node 'italic 'bold))
+
+(define-public (make-pango-font-tree roman-str sans-str typewrite-str factor)
+ (let ((n (make-font-tree-node 'font-encoding 'fetaMusic)))
+ (add-music-fonts n factor)
+ (add-pango-fonts n 'roman roman-str factor)
+ (add-pango-fonts n 'sans sans-str factor)
+ (add-pango-fonts n 'typewriter typewrite-str factor)
+ n))
+
+(define-public (make-century-schoolbook-tree factor)
+ (make-pango-font-tree
+ "Century Schoolbook L"
+ "Sans" "Mono" factor))
+
+(define-public (magstep s)
+ (exp (* (/ s 6) (log 2))))
+
+(define-public (magnification->font-size m)
+ (* 6 (/ (log m) (log 2))))
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