-;;;
-;;; font.scm -- implement Font stuff
-;;;
-;;; source file of the GNU LilyPond music typesetter
-;;;
-;;; (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
-;;;
-
-(define style-to-font-alist
- `(
- (finger . ((font-family . number) (font-relative-size . -3)))
- (volta . ((font-family . number) (font-relative-size . -2)))
- (timesig . ((font-family . number) (font-relative-size . 0)))
- (mmrest . ((font-family . number) (font-relative-size . -1)))
- (mark . ((font-family . number) (font-relative-size . 1)))
- (script . ((font-family . roman) (font-relative-size . -1)))
- (large . ((font-family . roman) (font-relative-size . 1)))
- (Large . ((font-series . bold) (font-family . roman) (font-relative-size . 2)))
- (dynamic . ((font-series . bold) (font-family . dynamic) (font-relative-size . 0)))
-))
-
-(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-name) 4)
- ((eq? name 'font-point-size-size) 5)
- )
- ))
-
-;; return that part of LIST for which PRED is true.
-(define (filter-list pred? list)
- (if (null? list) '()
- (let* (
- (rest (filter-list pred? (cdr list)))
- )
- (if (pred? (car list))
- (cons (car list) rest)
- rest
- )
- )
- )
- )
-
-;;;;;;;;; TODO TODO . (should not use filtering?)
-;; this is bad, since we generate garbage every font-lookup.
-;; otoh, if the qualifiers is narrow enough , we don't generate much garbage.
-
-
-;; return those descriptions from FONT-DESCR-LIST whose FIELD-NAME matches VALUE
-(define (filter-field field-name value font-descr-alist)
- (filter-list
- (lambda (x) (eq? value (font-field field-name (car x))))
- font-descr-alist)
- )
-
-(define paper20-style-sheet-alist
- '(
- ((0 medium upright music feta 20) . "feta20")
- ((-1 medium upright music feta 16) . "feta16")
- ((-2 medium upright music feta 13) . "feta13")
- ((-3 medium upright music feta 13) . "feta11")
- ((-4 medium upright music feta 13) . "feta11")
- ((1 medium upright music feta 23) . "feta23")
- ((2 medium upright music feta 26) . "feta26")
- ((0 medium upright braces feta-braces 20) . "feta-braces20")
- ((0 medium italic roman cmti 10) . "cmti10")
- ((1 medium italic roman cmti 12) . "cmti12")
- ((3 bold italic dynamic feta 10) . "feta-din13")
- ((2 bold italic dynamic feta 10) . "feta-din13")
- ((1 bold italic dynamic feta 10) . "feta-din12")
- ((0 bold italic dynamic feta 10) . "feta-din10")
- ((-1 bold italic dynamic feta 10) . "feta-din8")
- ((-2 bold italic dynamic feta 10) . "feta-din7")
- ((-3 bold italic dynamic feta 10) . "feta-din6")
- ((-4 bold italic dynamic feta 10) . "feta-din5")
- ((-5 bold italic dynamic feta 10) . "feta-din4")
- ((3 medium upright number feta-nummer 13) . "feta-nummer13")
- ((2 medium upright number feta-nummer 13) . "feta-nummer13")
- ((1 medium upright number feta-nummer 12) . "feta-nummer12")
- ((0 medium upright number feta-nummer 10) . "feta-nummer10")
- ((-1 medium upright number feta-nummer 8) . "feta-nummer8")
- ((-2 medium upright number feta-nummer 6) . "feta-nummer6")
- ((-3 medium upright number feta-nummer 5) . "feta-nummer5")
- ((-4 medium upright number feta-nummer 4) . "feta-nummer4")
- ((0 medium upright roman cmr 10) . "cmr10")
- ((1 medium upright roman cmr 12) . "cmr12")
- ((-1 medium upright roman cmr 8) . "cmr8" )
- ((-2 medium upright roman cmr 7) . "cmr7" )
- ((-3 medium upright roman cmr 6) . "cmr6" )
- ((-4 medium upright roman cmr 5) . "cmr5" )
- ((-5 medium upright roman cmr 4) . "cmr4" )
- ((2 bold upright roman cmbx 10) . "cmbx10")
- ((1 bold upright roman cmbx 12) . "cmbx12")
- ((-3 medium upright math msam 10) . "msam10")
- ((-2 medium upright math msam 10) . "msam10")
- ((-1 medium upright math msam 10) . "msam10")
- ((0 medium upright math msam 10) . "msam10")
- ))
-
-
-;; return a FONT-DESCR with relative size incremented by INCREMENT
-(define (change-relative-size font-desc increment)
- (cons (+ increment (car font-desc)) (cdr font-desc))
- )
-
-;; map a function FUNC over the keys of an alist LIST, leaving the vals.
-(define (map-alist-keys func list)
- (if (null? list)
- '()
- (cons (cons (func (caar list)) (cdar list))
- (map-alist-keys func (cdr list)))
- ))
-
-;; map a function FUNC over the vals of LIST, leaving the keys.
-(define (map-alist-vals func list)
- (if (null? list)
- '()
- (cons (cons (caar list) (func (cdar list)))
- (map-alist-vals func (cdr list)))
- ))
-
-(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 style-sheet-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)
- ))
- )
-
-
-(define (font-regexp-to-font-name paper regexp)
- (let ((style-sheet (cdr (assoc paper style-sheet-alist))))
- (let loop ((fonts style-sheet))
- (if (string-match regexp (caar fonts))
- (cdar fonts)
- (if (pair? (cdr fonts))
- (loop (cdr fonts))
- '())))))
-
-;; reduce the font list by successively applying a font-qualifier.
-(define (qualifiers-to-fontname qualifiers font-descr-alist)
- (if (null? qualifiers)
- (if (null? font-descr-alist)
- ""
- (cdar font-descr-alist)) ; return the topmost.
-
- (qualifiers-to-fontname
- (cdr qualifiers)
- (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
- )
- ))
-
-(define (properties-to-font-name paper properties-alist)
- (let* (
- (fonts (cdr (assoc paper style-sheet-alist)))
-
- ;; change order to change priorities of qualifiers.
- (q-order '(font-name font-family font-series font-shape font-point-size font-relative-size))
- (rawqualifiers (map (lambda (x) (assoc x properties-alist))
- q-order))
-
- (qualifiers (filter-list pair? rawqualifiers))
- (fontnm (qualifiers-to-fontname qualifiers fonts))
- (err (current-error-port))
- )
-
- (if (eq? fontnm "")
- (begin
- (display "\ncouldn't find font satisfying " err)
- (write qualifiers err)
- (display "\n" err)
- "cmr10"
- )
- fontnm)
-
-
- ))
-
-
-(define markup-abbrev-to-properties-alist
- (append
- '(
- (rows . ((align . 0)))
- (lines . ((align . 1)))
- (roman . ((font-family . roman)))
- (music . ((font-family . music)))
- (finger . ((font-style . finger)))
- (bold . ((font-series . bold)))
- (italic . ((font-shape . italic)))
- (named . ((lookup . name)))
- (super . ((raise . 1) (font-relative-size . -1)))
- (sub . ((raise . -1) (font-relative-size . -1)))
- (text . ((lookup . value)))
- )
- (map (lambda (x) (cons (car x) (cons 'font-style (car x))))
- style-to-font-alist)))
-
-(define (markup-to-properties markup)
- ;;(display "markup: `")
- ;;(display markup)
- ;;(display "'\n")
- (if (pair? markup)
- (list markup)
- (let ((entry (assoc markup markup-abbrev-to-properties-alist)))
- (if entry (cdr entry)
- (list (cons markup #t))))))
-
-; fixme, how's this supposed to work?
-; and why don't we import font-setting from elt?
-(define (style-to-font-name paper style)
- (let* ((entry (assoc style style-to-font-alist))
- (qs (if entry (cdr entry) '()))
- (sheet (cdr (assoc paper style-sheet-alist)))
- (fontnm (qualifiers-to-fontname qs sheet))
- (err (current-error-port)))
- (if (eq? fontnm "")
- (begin
- (display "\ncouldn't find font satisfying " err)
- (display qs err)
- (display "\n" err)
- "cmr10")
- fontnm)))
-
-
-
-
-; (define (test-module)
-; (display (filter-list pair? '(1 2 (1 2) (1 .2)))
-;(display (filter-field 'font-name 'cmbx paper20-style-sheet-alist))
-
-; (display (qualifiers-to-fontname '((font-name . cmbx)) paper20-style-sheet-alist))
-; (display (style-to-font-name 'paper20 'large))
-; )
+;;;; This file is part of LilyPond, the GNU music typesetter.
+;;;;
+;;;; Copyright (C) 2004--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;;
+;;;; 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/>.
+;; TODO:
+;;
+;; lookup-font should be written in C.
+;;
+;; We have a tree, where each level of the tree is a qualifier
+;; (eg. encoding, family, shape, series etc.) this defines the levels
+;; in the tree. The first one is encoding, so we can directly select
+;; between text or music in the first step of the selection.
+(define default-qualifier-order
+ '(font-encoding font-family font-shape font-series))
+
+(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)
+ (for-each (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)
+ (for-each
+ (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-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))
+
+;; TODO - we could actually construct this by loading all OTFs and
+;; inspecting their design size fields.
+(define-public feta-design-size-mapping
+ '((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 family name brace design-size-alist factor)
+ "Set up music fonts.
+
+Arguments:
+@itemize
+@item
+@var{node} is the font tree to modify.
+
+@item
+@var{family} is the family name of the music font.
+
+@item
+@var{name} is the basename for the music font.
+@file{@var{name}-<designsize>.otf} should be the music font,
+
+@item
+@var{brace} is the basename for the brace font.
+@file{@var{brace}-brace.otf} should have piano braces.
+
+@item
+@var{design-size-alist} is a list of @code{(rounded . designsize)}.
+@code{rounded} is a suffix for font filenames, while @code{designsize}
+should be the actual design size. The latter is used for text fonts
+loaded through pango/@/fontconfig.
+
+@item
+@var{factor} is a size factor relative to the default size that is being
+used. This is used to select the proper design size for the text fonts.
+@end itemize"
+ (for-each
+ (lambda (x)
+ (add-font node
+ (list (cons 'font-encoding (car x))
+ (cons 'font-family family))
+ (cons (* factor (cadr x))
+ (caddr x))))
+
+ `((fetaText ,(ly:pt 20.0)
+ ,(list->vector
+ (map (lambda (tup)
+ (cons (ly:pt (cdr tup))
+ (format #f "~a-~a ~a"
+ name
+ (car tup)
+ (ly:pt (cdr tup)))))
+ design-size-alist)))
+ (fetaMusic ,(ly:pt 20.0)
+ ,(list->vector
+ (map (lambda (size-tup)
+ (delay (ly:system-font-load
+ (format #f "~a-~a" name (car size-tup)))))
+ design-size-alist
+ )))
+ (fetaBraces ,(ly:pt 20.0)
+ #(,(delay (ly:system-font-load
+ (format #f "~a-brace" brace)))))
+ )))
+
+(define-public (add-pango-fonts node lily-family family factor)
+ ;; Synchronized with the `text-font-size' variable in
+ ;; layout-set-absolute-staff-size-in-module (see paper.scm).
+ (define text-font-size (ly:pt (* factor 11.0)))
+
+ (define (add-node shape series)
+ (add-font node
+ `((font-family . ,lily-family)
+ (font-shape . ,shape)
+ (font-series . ,series)
+ (font-encoding . latin1) ;; ugh.
+ )
+ `(,text-font-size
+ . #(,(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))
+
+; This function allows the user to change the specific fonts, leaving others
+; to the default values. This way, "make-pango-font-tree"'s syntax doesn't
+; have to change from the user's perspective.
+;
+; Usage:
+; \paper {
+; #(define fonts
+; (set-global-fonts
+; #:music "gonville" ; (the main notation font)
+; #:roman "FreeSerif" ; (the main/serif text font)
+; ))
+; }
+;
+; Leaving out "#:brace", "#:sans", and "#:typewriter" leave them at
+; "emmentaler", "sans-serif", and "monospace", respectively. All fonts are
+; still accesible through the usual scheme symbols: 'feta, 'roman, 'sans, and
+; 'typewriter.
+;
+; Note that 'LilyPond Serif', 'LilyPond Sans Serif' and 'Lilypond Monospace'
+; are aliases that are defined in mf/00-lilypond-fonts.conf.in (source file)
+; or fonts/00-lilypond-fonts.conf (installed file).
+
+(define*-public (set-global-fonts #:key
+ (music "emmentaler")
+ (brace "emmentaler")
+ (roman (if (eq? (ly:get-option 'backend) 'svg)
+ "serif" "LilyPond Serif"))
+ (sans (if (eq? (ly:get-option 'backend) 'svg)
+ "sans-serif" "LilyPond Sans Serif"))
+ (typewriter (if (eq? (ly:get-option 'backend) 'svg)
+ "monospace" "LilyPond Monospace"))
+ (factor 1))
+ (let ((n (make-font-tree-node 'font-encoding 'fetaMusic)))
+ (add-music-fonts n 'feta music brace feta-design-size-mapping factor)
+ (add-pango-fonts n 'roman roman factor)
+ (add-pango-fonts n 'sans sans factor)
+ (add-pango-fonts n 'typewriter typewriter factor)
+ n))
+
+(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 'feta "emmentaler" "emmentaler" feta-design-size-mapping 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-default-fonts-tree factor)
+ (make-pango-font-tree
+ (if (eq? (ly:get-option 'backend) 'svg) "serif" "LilyPond Serif")
+ (if (eq? (ly:get-option 'backend) 'svg) "sans-serif" "LilyPond Sans Serif")
+ (if (eq? (ly:get-option 'backend) 'svg) "monospace" "LilyPond Monospace")
+ factor))
+
+(define-public all-text-font-encodings
+ '(latin1))
+
+(define-public all-music-font-encodings
+ '(fetaBraces
+ fetaMusic
+ fetaText))
+
+(define-public (magstep s)
+ (exp (* (/ s 6) (log 2))))
+
+(define-public (magnification->font-size m)
+ (* 6 (/ (log m) (log 2))))
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