2 ;;; font.scm -- implement Font stuff
4 ;;; source file of the GNU LilyPond music typesetter
6 ;;; (c) 2000--2001 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-design-size) 5)
23 (else (ly-warning "unknown font field name"))
27 ;;;;;;;;; TODO TODO . (should not use filtering?)
28 ;; this is bad, since we generate garbage every font-lookup.
29 ;; otoh, if the qualifiers is narrow enough , we don't generate much garbage.
31 (define (filter-field field-name value font-descr-alist)
32 "return those descriptions from FONT-DESCR-LIST whose FIELD-NAME matches VALUE"
34 (lambda (x) (let* (field-value (font-field field-name (car x)))
35 (or (eq? field-value '*) (eq? value field-value))))
39 ;; should really have name/pt size at the front of the list.
41 ;; (also tried to vary the order of this list, with little effect)
42 (define paper20-style-sheet-alist
44 ;; why are font-names strings, not symbols?
45 ((3 medium upright number feta-nummer 13) . "feta-nummer13")
46 ((2 medium upright number feta-nummer 13) . "feta-nummer13")
47 ((1 medium upright number feta-nummer 11) . "feta-nummer11")
48 ((0 medium upright number feta-nummer 10) . "feta-nummer10")
49 ((-1 medium upright number feta-nummer 8) . "feta-nummer8")
50 ((-2 medium upright number feta-nummer 7) . "feta-nummer7")
51 ((-3 medium upright number feta-nummer 6) . "feta-nummer6")
52 ((-4 medium upright number feta-nummer 5) . "feta-nummer5")
53 ((-5 medium upright number feta-nummer 4) . "feta-nummer4")
55 ((4 medium upright roman cmr 17) . "cmr17")
56 ((3 medium upright roman cmr 17) . "cmr17")
57 ((2 medium upright roman cmr 12) . "cmr12")
58 ((1 medium upright roman cmr 12) . "cmr12")
59 ((0 medium upright roman cmr 10) . "cmr10")
60 ((-1 medium upright roman cmr 8) . "cmr8" )
61 ((-2 medium upright roman cmr 7) . "cmr7" )
62 ((-3 medium upright roman cmr 6) . "cmr6" )
63 ((-4 medium upright roman cmr 5) . "cmr5" )
64 ((-5 medium upright roman cmr 5) . "cmr5" )
66 ((3 medium italic roman cmti 12) . "cmti12")
67 ((2 medium italic roman cmti 12) . "cmti12")
68 ((1 medium italic roman cmti 12) . "cmti12")
69 ((0 medium italic roman cmti 10) . "cmti10")
70 ((-1 medium italic roman cmti 8) . "cmti8")
71 ((-2 medium italic roman cmti 7) . "cmti7")
72 ((-3 medium italic roman cmti 7) . "cmti7")
74 ((2 bold upright roman cmbx 12) . "cmbx12")
75 ((1 bold upright roman cmbx 12) . "cmbx12")
76 ((0 bold upright roman cmbx 10) . "cmbx10")
77 ((-1 bold upright roman cmbx 8) . "cmbx8")
78 ((-2 bold upright roman cmbx 7) . "cmbx7")
80 ((2 bold italic roman cmbxti 12) . "cmbxti12")
81 ((1 bold italic roman cmbxti 12) . "cmbxti12")
82 ((0 bold italic roman cmbxti 10) . "cmbxti10")
83 ((-1 bold italic roman cmbxti 8) . "cmbxti8")
84 ((-2 bold italic roman cmbxti 7) . "cmbxti7")
86 ((4 medium upright typewriter cmtt 17) . "cmtt17")
87 ((3 medium upright typewriter cmtt 17) . "cmtt17")
88 ((2 medium upright typewriter cmtt 12) . "cmtt12")
89 ((1 medium upright typewriter cmtt 12) . "cmtt12")
90 ((0 medium upright typewriter cmtt 10) . "cmtt10")
91 ((-1 medium upright typewriter cmtt 8) . "cmtt8" )
92 ((-2 medium upright typewriter cmtt 7) . "cmtt7" )
93 ((-3 medium upright typewriter cmtt 6) . "cmtt6" )
94 ((-4 medium upright typewriter cmtt 5) . "cmtt5" )
95 ((-5 medium upright typewriter cmtt 5) . "cmtt5" )
97 ((3 medium caps roman cmcsc 12) . "cmcsc12")
98 ((2 medium caps roman cmcsc 12) . "cmcsc12")
99 ((1 medium caps roman cmcsc 12) . "cmcsc12")
100 ((0 medium caps roman cmcsc 10) . "cmcsc10")
101 ((-1 medium caps roman cmcsc 8) . "cmcsc8")
102 ((-2 medium caps roman cmcsc 7) . "cmcsc7")
103 ((-3 medium caps roman cmcsc 7) . "cmcsc7")
105 ;; smallest needs 8 steps: -3 to +5, so
106 ;; biggest also needs 8 available steps: +2 to + 10
107 ((10 * * braces feta-braces 3) . "feta-braces3")
108 ((9 * * braces feta-braces 3) . "feta-braces3")
109 ((8 * * braces feta-braces 3) . "feta-braces3")
110 ((7 * * braces feta-braces 3) . "feta-braces3")
111 ((6 * * braces feta-braces 3) . "feta-braces3")
112 ((5 * * braces feta-braces 3) . "feta-braces3")
113 ((4 * * braces feta-braces 2) . "feta-braces2")
114 ((3 * * braces feta-braces 1) . "feta-braces1")
115 ((2 * * braces feta-braces 0) . "feta-braces0")
116 ((1 * * braces feta-braces 0) . "feta-braces0")
117 ((0 * * braces feta-braces 0) . "feta-braces0")
118 ((-1 * * braces feta-braces 0) . "feta-braces0")
119 ((-2 * * braces feta-braces 0) . "feta-braces0")
120 ((-3 * * braces feta-braces 0) . "feta-braces0")
122 ((3 * * dynamic feta-din 19) . "feta-din19")
123 ((2 * * dynamic feta-din 19) . "feta-din19")
124 ((1 * * dynamic feta-din 17) . "feta-din17")
125 ((0 * * dynamic feta-din 14) . "feta-din14")
126 ((-1 * * dynamic feta-din 12) . "feta-din12")
127 ((-2 * * dynamic feta-din 9) . "feta-din9")
128 ((-3 * * dynamic feta-din 8) . "feta-din8")
129 ((-4 * * dynamic feta-din 7) . "feta-din7")
130 ((-5 * * dynamic feta-din 6) . "feta-din6")
132 ((2 * * music feta 26) . "feta26")
133 ((1 * * music feta 23) . "feta23")
134 ((0 * * music feta 20) . "feta20")
135 ((-0.5 * * music feta 20) . "feta19")
136 ((-1 * * music feta 16) . "feta16")
137 ((-2 * * music feta 13) . "feta13")
138 ((-3 * * music feta 11) . "feta11")
139 ((-4 * * music feta 11) . "feta11")
141 ((0 * * math msam 10) . "msam10")
142 ((-1 * * math msam 10) . "msam10")
143 ((-2 * * math msam 10) . "msam10")
144 ((-3 * * math msam 10) . "msam10")
148 (define (change-relative-size font-desc decrement)
149 "return a FONT-DESCR with relative size decremented by DECREMENT"
150 (cons (- (car font-desc) decrement) (cdr font-desc))
154 (define (map-alist-keys func list)
155 "map a function FUNC over the keys of an alist LIST, leaving the vals. "
158 (cons (cons (func (caar list)) (cdar list))
159 (map-alist-keys func (cdr list)))
163 (define (map-alist-vals func list)
164 "map a function FUNC over the vals of LIST, leaving the keys."
167 (cons (cons (caar list) (func (cdar list)))
168 (map-alist-vals func (cdr list)))
171 (define (change-style-sheet-relative-size sheet x)
172 (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
175 ;; make style sheet for each paper version.
176 (define font-list-alist
177 (map-alist-vals (lambda (x) (change-style-sheet-relative-size
178 paper20-style-sheet-alist x))
190 (define (make-style-sheet sym)
191 `((fonts . ,(cdr (assoc sym font-list-alist)))
193 . ((font-family . music)
194 (font-relative-size . 0)
195 (font-shape . upright)
196 (font-series . medium)
199 . ((finger . ((font-family . number) (font-relative-size . -3)))
200 (volta . ((font-family . number) (font-relative-size . -2)))
201 (tuplet . ((font-family . roman) (font-shape . italic) (font-relative-size . -1)))
203 (timesig . ((font-family . number) (font-relative-size . 0)))
204 (timesig-symbol . ((font-family . music) (font-relative-size . 0)))
206 (mmrest . ((font-family . number) (font-relative-size . 1)))
207 (mmrest-symbol . ((font-family . music) (font-relative-size . 0)))
209 (mark . ((font-family . number) (font-relative-size . 1)))
210 (script . ((font-family . roman) (font-relative-size . -1)))
211 (large . ((font-family . roman) (font-relative-size . 1)))
212 (Large . ((font-series . bold) (font-family . roman)
213 (font-relative-size . 2)))
214 (dynamic . ((font-family . dynamic) (font-relative-size . 0)))
216 (properties-to-font .
217 ,Font_interface::properties_to_font_name)
219 (markup-to-properties . ,markup-to-properties)
221 . ((columns . ((axis . 0)))
222 (lines . ((axis . 1)))
223 (roman . ((font-family . roman)))
224 (music . ((font-family . music) (lookup . name)))
225 (finger . ((font-style . finger)))
226 (bold . ((font-series . bold)))
227 (upright . ((font-shape . upright)))
228 (italic . ((font-shape . italic)))
229 (named . ((lookup . name)))
230 (overstrike . ((extent . (0 . 0))))
231 (super . ((raise . 1) (font-relative-size . -1) (extent . (0 . 0))))
232 (sub . ((raise . -1) (font-relative-size . -1) (extent . (0 . 0))))
233 (text . ((lookup . value)))
240 (define (qualifiers-to-fontnames qualifiers font-descr-alist)
241 " reduce the font list by successively applying a font-qualifier."
242 (if (null? qualifiers)
245 (qualifiers-to-fontnames
247 (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
251 (define (wild-eq? x y)
256 (define (font-qualifies? qualifiers font-desc)
257 "does FONT-DESC satisfy QUALIFIERS?"
258 (if (null? qualifiers) #t
259 (if (wild-eq? (font-field (caar qualifiers) font-desc) (cdar qualifiers))
260 (font-qualifies? (cdr qualifiers) font-desc)
263 (define (find-first-font qualifiers fonts)
266 (if (font-qualifies? qualifiers (caar fonts))
268 (find-first-font qualifiers (cdr fonts))
273 (define (select-unique-font qualifiers fonts)
274 "return a single font from FONTS (or a default, if none found)
275 and warn if the selected font is not unique.
278 (err (current-error-port))
282 (if (not (= (length fonts) 1))
284 (display "\ncouldn't find unique font satisfying " err)
285 (write qualifiers err)
286 (display " found " err)
289 (write (map cdr fonts) err))
294 (cdar fonts)) ; return the topmost.
299 (define (chain-assoc x alist-list)
300 (if (null? alist-list)
302 (let* ((handle (assoc x (car alist-list))))
305 (chain-assoc x (cdr alist-list))))))
308 ;; the C++ version in font-interface.cc is usually used.
310 ;; FIXME: this has silently been broken by the introduction
311 ;; of wildcards in the font list.
312 (define (properties-to-font-name fonts properties-alist-list)
314 ;; change order to change priorities of qualifiers.
315 (q-order '(font-name font-family font-series font-shape
316 font-design-size font-relative-size))
317 (rawqualifiers (map (lambda (x)
318 (chain-assoc x properties-alist-list))
320 (qualifiers (filter-list pair? rawqualifiers))
321 (selected (find-first-font qualifiers fonts))
322 (err (current-error-port)))
324 (if (equal? selected "")
326 (display "\ncouldn't find any font satisfying " err)
327 (write qualifiers err)
330 selected) ; return the topmost.
333 (define (markup-to-properties sheet markup)
334 ;; (display "markup: `")
339 ;; This is hairy. We want to allow:
340 ;; ((foo bar) "text")
341 ;; ((foo (bar . 1)) "text")
344 (if (and (symbol? (car markup))
345 (or (not (pair? (cdr markup)))
346 (number? (cadr markup))))
347 (if (equal? '() (cdr markup))
348 (markup-to-properties sheet (car markup))
351 (if (equal? '() (cdr markup))
352 (markup-to-properties sheet (car markup))
353 (append (markup-to-properties sheet (car markup))
354 (markup-to-properties sheet (cdr markup)))))
356 ;; markup is single abbreviation
357 (let ((entry (assoc markup
359 (append (cdr (assoc 'abbreviation-alist sheet))
360 (cdr (assoc 'style-alist sheet))))))
363 (list (cons markup #t))))))
366 ; fixme, how's this supposed to work?
367 ; and why don't we import font-setting from elt?
368 (define (style-to-font-name sheet style)
369 (let* ((entry (assoc style style-to-font-alist))
370 (qualifiers (if entry (cdr entry) '()))
371 (font (find-first-font qualifiers sheet))
372 (err (current-error-port))
377 (display "\ncouldn't find any font satisfying " err)
378 (write qualifiers err)
381 font) ; return the topmost.
385 (define (test-module)
386 (display (filter-list pair? '(1 2 (1 2) (1 .2)))
387 (display (filter-field 'font-name 'cmbx paper20-style-sheet-alist))
389 (display (qualifiers-to-fontname '((font-name . cmbx)) paper20-style-sheet-alist))
390 (display (style-to-font-name 'paper20 'large))