2 ;;; font.scm -- implement Font stuff
4 ;;; source file of the GNU LilyPond music typesetter
6 ;;; (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
9 (define style-to-font-alist
13 (define (font-field name font-descr)
17 ((eq? name 'font-relative-size) 0)
18 ((eq? name 'font-series) 1)
19 ((eq? name 'font-shape) 2)
20 ((eq? name 'font-family) 3)
21 ((eq? name 'font-name) 4)
22 ((eq? name 'font-point-size) 5)
23 (else (ly-warning "unknown font field name"))
27 ;; return that part of LIST for which PRED is true.
28 (define (filter-list pred? list)
31 (rest (filter-list pred? (cdr list)))
33 (if (pred? (car list))
34 (cons (car list) rest)
41 ;;;;;;;;; TODO TODO . (should not use filtering?)
42 ;; this is bad, since we generate garbage every font-lookup.
43 ;; otoh, if the qualifiers is narrow enough , we don't generate much garbage.
46 ;; return those descriptions from FONT-DESCR-LIST whose FIELD-NAME matches VALUE
47 (define (filter-field field-name value font-descr-alist)
49 (lambda (x) (eq? value (font-field field-name (car x))))
53 (define paper20-style-sheet-alist
55 ((3 medium upright number feta-nummer 13) . "feta-nummer13")
56 ((2 medium upright number feta-nummer 13) . "feta-nummer13")
57 ((1 medium upright number feta-nummer 11) . "feta-nummer11")
58 ((0 medium upright number feta-nummer 10) . "feta-nummer10")
59 ((-1 medium upright number feta-nummer 8) . "feta-nummer8")
60 ((-2 medium upright number feta-nummer 6) . "feta-nummer6")
61 ((-3 medium upright number feta-nummer 5) . "feta-nummer5")
62 ((-4 medium upright number feta-nummer 4) . "feta-nummer4")
63 ((0 medium upright roman cmr 10) . "cmr10")
64 ((1 medium upright roman cmr 12) . "cmr12")
65 ((-1 medium upright roman cmr 8) . "cmr8" )
66 ((-2 medium upright roman cmr 7) . "cmr7" )
67 ((-3 medium upright roman cmr 6) . "cmr6" )
68 ((-4 medium upright roman cmr 5) . "cmr5" )
69 ((-5 medium upright roman cmr 4) . "cmr4" )
70 ((-3 medium italic roman cmti 5) . "cmti6")
71 ((-2 medium italic roman cmti 6) . "cmti7")
72 ((-1 medium italic roman cmti 8) . "cmti8")
73 ((0 medium italic roman cmti 10) . "cmti10")
74 ((1 medium italic roman cmti 12) . "cmti12")
75 ((2 bold upright roman cmbx 14) . "cmbx14")
76 ((1 bold upright roman cmbx 12) . "cmbx12")
77 ((0 bold upright roman cmbx 10) . "cmbx10")
78 ((-1 bold upright roman cmbx 8) . "cmbx8")
79 ((-2 bold upright roman cmbx 7) . "cmbx7")
80 ((-3 medium upright math msam 10) . "msam10")
81 ((-2 medium upright math msam 10) . "msam10")
82 ((-1 medium upright math msam 10) . "msam10")
83 ((0 medium upright math msam 10) . "msam10")
84 ;; should use the same brace font every where and fix C++ code.
85 ((0 medium upright braces feta-braces 20) . "feta-braces20")
86 ((2 medium upright braces feta-braces 26) . "feta-braces26")
87 ((1 medium upright braces feta-braces 23) . "feta-braces23")
88 ((3 bold italic dynamic feta 16) . "feta-din16")
89 ((2 bold italic dynamic feta 16) . "feta-din16")
90 ((3 bold italic dynamic feta 10) . "feta-din13")
91 ((2 bold italic dynamic feta 10) . "feta-din13")
92 ((1 bold italic dynamic feta 10) . "feta-din12")
93 ((0 bold italic dynamic feta 10) . "feta-din10")
94 ((-1 bold italic dynamic feta 10) . "feta-din8")
95 ((-2 bold italic dynamic feta 10) . "feta-din7")
96 ((-3 bold italic dynamic feta 10) . "feta-din6")
97 ((-4 bold italic dynamic feta 10) . "feta-din5")
98 ((-5 bold italic dynamic feta 10) . "feta-din4")
99 ((2 medium upright music feta 26) . "feta26")
100 ((1 medium upright music feta 23) . "feta23")
101 ((0 medium upright music feta 20) . "feta20")
102 ((-0.5 medium upright music feta 20) . "feta19")
103 ((-1 medium upright music feta 16) . "feta16")
104 ((-2 medium upright music feta 13) . "feta13")
105 ((-3 medium upright music feta 13) . "feta11")
106 ((-4 medium upright music feta 13) . "feta11")
107 ((-1 medium upright math msam 10) . "msam10")
108 ((-2 medium upright math msam 10) . "msam10")
109 ((-3 medium upright math msam 10) . "msam10")
112 ;; return a FONT-DESCR with relative size decremented by DECREMENT
113 (define (change-relative-size font-desc decrement)
114 (cons (- (car font-desc) decrement) (cdr font-desc))
117 ;; map a function FUNC over the keys of an alist LIST, leaving the vals.
118 (define (map-alist-keys func list)
121 (cons (cons (func (caar list)) (cdar list))
122 (map-alist-keys func (cdr list)))
125 ;; map a function FUNC over the vals of LIST, leaving the keys.
126 (define (map-alist-vals func list)
129 (cons (cons (caar list) (func (cdar list)))
130 (map-alist-vals func (cdr list)))
133 (define (change-style-sheet-relative-size sheet x)
134 (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
137 ;; make style sheet for each paper version.
138 (define font-list-alist
139 (map-alist-vals (lambda (x) (change-style-sheet-relative-size
140 paper20-style-sheet-alist x))
152 (define (make-style-sheet sym)
153 `((fonts . ,(cdr (assoc sym font-list-alist)))
155 . ((font-family . music)
156 (font-relative-size . 0)
157 (font-shape . upright)
158 (font-series . medium)
161 . ((finger . ((font-family . number) (font-relative-size . -3)))
162 (volta . ((font-family . number) (font-relative-size . -2)))
163 (tuplet . ((font-family . roman) (font-shape . italic) (font-relative-size . -1)))
164 (timesig . ((font-family . number) (font-relative-size . 0)))
165 (mmrest . ((font-family . number) (font-relative-size . 1)))
166 (mark . ((font-family . number) (font-relative-size . 1)))
167 (script . ((font-family . roman) (font-relative-size . -1)))
168 (large . ((font-family . roman) (font-relative-size . 1)))
169 (Large . ((font-series . bold) (font-family . roman) (font-relative-size . 2)))
170 (dynamic . ((font-series . bold) (font-family . dynamic) (font-relative-size . 0)))
172 (properties-to-font . ,properties-to-font-name)
174 ;; FIXME: this is a not-so-cool idea to use ALIGN
175 ;; RAISE, LOOKUP, since they are not proper elt-properties,
176 ;; and might interfere with them.
177 (markup-to-properties . ,markup-to-properties)
179 . ((rows . ((align . 0)))
180 (lines . ((align . 1)))
181 (roman . ((font-family . roman)))
182 (music . ((font-family . music) (font-shape . upright)))
183 (finger . ((font-style . finger)))
184 (bold . ((font-series . bold)))
185 (italic . ((font-shape . italic)))
186 (named . ((lookup . name)))
187 (super . ((raise . 1) (font-relative-size . -1)))
188 (sub . ((raise . -1) (font-relative-size . -1)))
189 (text . ((lookup . value)))
196 ;; reduce the font list by successively applying a font-qualifier.
197 (define (qualifiers-to-fontnames qualifiers font-descr-alist)
198 (if (null? qualifiers)
201 (qualifiers-to-fontnames
203 (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
208 ;; does FONT-DESC satisfy QUALIFIERS?
209 (define (font-qualifies? qualifiers font-desc)
210 (if (null? qualifiers) #t
211 (if (eq? (font-field (caar qualifiers) font-desc) (cdar qualifiers))
212 (font-qualifies? (cdr qualifiers) font-desc)
218 (define (find-first-font qualifiers fonts)
221 (if (font-qualifies? qualifiers (caar fonts))
223 (find-first-font qualifiers (cdr fonts))
228 ;; return a single font from FONTS (or a default, if none found)
229 ;; and warn if the selected font is not unique.
230 (define (select-unique-font qualifiers fonts)
232 (err (current-error-port))
236 (if (not (= (length fonts) 1))
238 (display "\ncouldn't find unique font satisfying " err)
239 (write qualifiers err)
240 (display " found " err)
243 (write (map cdr fonts) err))
248 (cdar fonts)) ; return the topmost.
253 (define (chain-assoc x alist-list)
254 (if (null? alist-list)
257 (handle (assoc x (car alist-list)))
261 (chain-assoc x (cdr alist-list))
268 ;; add support for override by font-name
269 ;; very often-used; hard-code in C++, and use SCM glue code.
271 (define (properties-to-font-name fonts properties-alist-list)
273 ;; change order to change priorities of qualifiers.
274 (q-order '(font-name font-family font-series font-shape font-point-size font-relative-size))
275 (rawqualifiers (map (lambda (x) (chain-assoc x properties-alist-list))
277 (qualifiers (filter-list pair? rawqualifiers))
278 (selected (find-first-font qualifiers fonts))
279 (err (current-error-port))
282 (if (equal? selected "")
284 (display "\ncouldn't find any font satisfying " err)
285 (write qualifiers err)
288 selected) ; return the topmost.
291 (define (markup-to-properties sheet markup)
292 ;;(display "markup: `")
297 (let ((entry (assoc markup
299 (append (cdr (assoc 'abbreviation-alist sheet))
300 (cdr (assoc 'style-alist sheet))))))
303 (list (cons markup #t))))))
305 ; fixme, how's this supposed to work?
306 ; and why don't we import font-setting from elt?
307 (define (style-to-font-name sheet style)
308 (let* ((entry (assoc style style-to-font-alist))
309 (qualifiers (if entry (cdr entry) '()))
310 (font (find-first-font qualifiers sheet))
311 (err (current-error-port))
316 (display "\ncouldn't find any font satisfying " err)
317 (write qualifiers err)
320 font) ; return the topmost.
326 ; (define (test-module)
327 ; (display (filter-list pair? '(1 2 (1 2) (1 .2)))
328 ;(display (filter-field 'font-name 'cmbx paper20-style-sheet-alist))
330 ; (display (qualifiers-to-fontname '((font-name . cmbx)) paper20-style-sheet-alist))
331 ; (display (style-to-font-name 'paper20 'large))