2 ;;; font.scm -- implement Font stuff
4 ;;; source file of the GNU LilyPond music typesetter
6 ;;; (c) 2000--2002 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-design-size) 4)
22 (else (ly-warning "unknown font field name"))
28 ;; most of these routines have been reimplemented in C++
30 ;; TODO TODO . (should not use filtering?)
31 ;; this is bad, since we generate garbage every font-lookup.
32 ;; otoh, if the qualifiers is narrow enough , we don't generate much garbage.
34 (define (filter-field field-name value font-descr-alist)
35 "return those descriptions from FONT-DESCR-LIST whose FIELD-NAME matches VALUE"
37 (lambda (x) (let* (field-value (font-field field-name (car x)))
38 (or (eq? field-value '*) (eq? value field-value))))
42 (define paper-style-sheet-alist
44 ((* * * braces *) . ("feta-braces0"
54 ;; FIXME: what about this comment?:
56 ;; font-lookup seems a little inefficient -- walking this entire list
59 ;; should really have name/pt size at the front of the list.
60 ;; (also tried to vary the order of this list, with little effect)
62 ;; (font-relative-size font-series font-shape font-family
65 (define paper20-style-sheet-alist
67 ;; why are font file names strings, not symbols?
68 ((3 medium upright number 13) . "feta-nummer13")
69 ((2 medium upright number 13) . "feta-nummer13")
70 ((1 medium upright number 11) . "feta-nummer11")
71 ((0 medium upright number 10) . "feta-nummer10")
72 ((-1 medium upright number 8) . "feta-nummer8")
73 ((-2 medium upright number 7) . "feta-nummer7")
74 ((-3 medium upright number 6) . "feta-nummer6")
75 ((-4 medium upright number 5) . "feta-nummer5")
76 ((-5 medium upright number 4) . "feta-nummer4")
78 ((4 medium upright roman 17) . "cmr17")
79 ((3 medium upright roman 17) . "cmr17")
80 ((2 medium upright roman 12) . "cmr12")
81 ((1 medium upright roman 12) . "cmr12")
82 ((0 medium upright roman 10) . "cmr10")
83 ((-1 medium upright roman 8) . "cmr8" )
84 ((-2 medium upright roman 7) . "cmr7" )
85 ((-3 medium upright roman 6) . "cmr6" )
86 ((-4 medium upright roman 5) . "cmr5" )
87 ((-5 medium upright roman 5) . "cmr5" )
89 ((3 medium italic roman 12) . "cmti12")
90 ((2 medium italic roman 12) . "cmti12")
91 ((1 medium italic roman 12) . "cmti12") ;;; ugh. Should add magnification here!
92 ((0 medium italic roman 10) . "cmti12")
93 ((-1 medium italic roman 8) . "cmti10")
94 ((-2 medium italic roman 7) . "cmti8")
95 ((-3 medium italic roman 7) . "cmti7")
97 ;;; cmbx17 is sauter, not commonly available as Type1.
98 ((4 bold upright roman 17) . "cmr17")
99 ((3 bold upright roman 17) . "cmr17")
101 ((2 bold upright roman 14) . "cmbx14")
102 ((1 bold upright roman 12) . "cmbx12")
103 ((0 bold upright roman 10) . "cmbx10")
104 ((-1 bold upright roman 8) . "cmbx8")
105 ((-2 bold upright roman 7) . "cmbx7")
107 ((2 bold italic roman 12) . "cmbxti12")
108 ((1 bold italic roman 12) . "cmbxti12")
109 ((0 bold italic roman 10) . "cmbxti10")
111 ((-1 bold italic roman 8) . "cmbxti8")
112 ((-2 bold italic roman 7) . "cmbxti7")
114 ((4 medium upright typewriter 17) . "cmtt17")
115 ((3 medium upright typewriter 17) . "cmtt17")
116 ((2 medium upright typewriter 12) . "cmtt12")
117 ((1 medium upright typewriter 12) . "cmtt12")
118 ((0 medium upright typewriter 10) . "cmtt10")
119 ((-1 medium upright typewriter 8) . "cmtt8" )
120 ((-2 medium upright typewriter 7) . "cmtt7" )
121 ((-3 medium upright typewriter 6) . "cmtt6" )
122 ((-4 medium upright typewriter 5) . "cmtt5" )
123 ((-5 medium upright typewriter 5) . "cmtt5" )
125 ((3 medium caps roman 12) . "cmcsc12")
126 ((2 medium caps roman 12) . "cmcsc12")
127 ((1 medium caps roman 12) . "cmcsc12")
128 ((0 medium caps roman 10) . "cmcsc10")
129 ((-1 medium caps roman 8) . "cmcsc8")
130 ((-2 medium caps roman 7) . "cmcsc7")
131 ((-3 medium caps roman 7) . "cmcsc7")
133 ((3 * * dynamic 19) . "feta-din19")
134 ((2 * * dynamic 19) . "feta-din19")
135 ((1 * * dynamic 17) . "feta-din17")
136 ((0 * * dynamic 14) . "feta-din14")
137 ((-1 * * dynamic 12) . "feta-din12")
138 ((-2 * * dynamic 9) . "feta-din9")
139 ((-3 * * dynamic 8) . "feta-din8")
140 ((-4 * * dynamic 7) . "feta-din7")
141 ((-5 * * dynamic 6) . "feta-din6")
143 ((2 * * music 26) . ("feta26" "parmesan26"))
144 ((1 * * music 23) . ("feta23" "parmesan23"))
145 ((0 * * music 20) . ("feta20" "parmesan20"))
146 ((-1 * * music 16) . ("feta16" "parmesan16"))
147 ((-2 * * music 13) . ("feta13" "parmesan13"))
148 ((-3 * * music 11) . ("feta11" "parmesan11"))
149 ((-4 * * music 11) . ("feta11" "parmesan11"))
151 ((2 * * ancient 26) . ("feta26" "parmesan26"))
152 ((1 * * ancient 23) . ("feta23" "parmesan23"))
153 ((0 * * ancient 20) . ("feta20" "parmesan20"))
154 ((-1 * * ancient 16) . ("feta16" "parmesan16"))
155 ((-2 * * ancient 13) . ("feta13" "parmesan13"))
156 ((-3 * * ancient 11) . ("feta11" "parmesan11"))
157 ((-4 * * ancient 11) . ("feta11" "parmesan11"))
159 ((0 * * math 10) . "msam10")
160 ((-1 * * math 10) . "msam10")
161 ((-2 * * math 10) . "msam10")
162 ((-3 * * math 10) . "msam10")
166 (define (change-relative-size font-desc decrement)
167 "return a FONT-DESCR with relative size decremented by DECREMENT"
169 (if (number? (car font-desc))
170 (cons (- (car font-desc) decrement) (cdr font-desc))
174 (define (change-rhs-size font-desc from to )
175 (cons (car font-desc)
176 (regexp-substitute/global #f from (cdr font-desc) 'pre to 'post))
181 (define (map-alist-keys func list)
182 "map a function FUNC over the keys of an alist LIST, leaving the vals. "
185 (cons (cons (func (caar list)) (cdar list))
186 (map-alist-keys func (cdr list)))
191 (define (map-alist-vals func list)
192 "map a function FUNC over the vals of LIST, leaving the keys."
195 (cons (cons (caar list) (func (cdar list)))
196 (map-alist-vals func (cdr list)))
199 (define (change-style-sheet-relative-size sheet x)
200 (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
203 ;; make style sheet for each paper version.
204 (define font-list-alist
205 (map-alist-vals (lambda (x) (change-style-sheet-relative-size
206 paper20-style-sheet-alist x))
217 ;; make a kludged up paper-19 style sheet. Broken by virtual fonts.
220 (set! font-list-alist
224 (map (lambda (x) (change-rhs-size x "20" "19"))
225 paper20-style-sheet-alist))
228 (define-public (make-style-sheet sym)
229 `((fonts . ,(append paper-style-sheet-alist
230 (cdr (assoc sym font-list-alist))))
232 . ((font-family . music)
233 (font-relative-size . 0)
234 (font-shape . upright)
235 (font-series . medium)
238 . ((finger . ((font-family . number) (font-relative-size . -3)))
239 (volta . ((font-family . number) (font-relative-size . -2)))
240 (tuplet . ((font-family . roman) (font-shape . italic) (font-relative-size . -1)))
242 (timesig . ((font-family . number) ))
243 (timesig-symbol . ((font-family . music) ))
245 (mmrest . ((font-family . number) ))
246 (mmrest-symbol . ((font-family . music) ))
248 (mark-number . ((font-family . number) (font-relative-size . 1)))
249 (mark-letter . ((font-family . roman)
251 (font-shape . upright)
252 (font-relative-size . 2)))
254 (script . ((font-family . roman) (font-relative-size . -1)))
255 (large . ((font-family . roman) (font-relative-size . 1)))
256 (Large . ((font-series . bold) (font-family . roman)
257 (font-relative-size . 2)))
258 (dynamic . ((font-family . dynamic) (font-relative-size . 0)))
260 (properties-to-font .
261 ,Font_interface::properties_to_font_name)
263 (markup-to-properties . ,markup-to-properties)
265 . ((columns . ((axis . 0)))
266 (lines . ((axis . 1)))
267 (roman . ((font-family . roman)))
268 (music . ((font-family . music) (lookup . name)))
269 (finger . ((font-style . finger)))
270 (bold . ((font-series . bold)))
271 (upright . ((font-shape . upright)))
272 (italic . ((font-shape . italic)))
273 (named . ((lookup . name)))
274 (overstrike . ((extent . (0 . 0))))
275 (super . ((raise . 1) (font-relative-size . -1) (extent . (0 . 0))))
276 (sub . ((raise . -1) (font-relative-size . -1) (extent . (0 . 0))))
277 (text . ((lookup . value)))
284 (define (qualifiers-to-fontnames qualifiers font-descr-alist)
285 " reduce the font list by successively applying a font-qualifier."
286 (if (null? qualifiers)
289 (qualifiers-to-fontnames
291 (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
295 (define (wild-eq? x y)
300 (define (font-qualifies? qualifiers font-desc)
301 "does FONT-DESC satisfy QUALIFIERS?"
302 (if (null? qualifiers) #t
303 (if (wild-eq? (font-field (caar qualifiers) font-desc) (cdar qualifiers))
304 (font-qualifies? (cdr qualifiers) font-desc)
307 (define (find-first-font qualifiers fonts)
310 (if (font-qualifies? qualifiers (caar fonts))
312 (find-first-font qualifiers (cdr fonts))
317 (define (select-unique-font qualifiers fonts)
318 "return a single font from FONTS (or a default, if none found)
319 and warn if the selected font is not unique.
322 (err (current-error-port))
326 (if (not (= (length fonts) 1))
328 (display "\ncouldn't find unique font satisfying " err)
329 (write qualifiers err)
330 (display " found " err)
333 (write (map cdr fonts) err))
338 (cdar fonts)) ; return the topmost.
343 (define (chain-assoc x alist-list)
344 (if (null? alist-list)
346 (let* ((handle (assoc x (car alist-list))))
349 (chain-assoc x (cdr alist-list))))))
352 ;; the C++ version in font-interface.cc is usually used.
354 ;; FIXME: this has silently been broken by the introduction
355 ;; of wildcards in the font list.
356 (define (properties-to-font-name fonts properties-alist-list)
358 ;; change order to change priorities of qualifiers.
359 (q-order '(font-family font-series font-shape
360 font-design-size font-relative-size))
361 (rawqualifiers (map (lambda (x)
362 (chain-assoc x properties-alist-list))
364 (qualifiers (filter-list pair? rawqualifiers))
365 (selected (find-first-font qualifiers fonts))
366 (err (current-error-port)))
368 (if (equal? selected "")
370 (display "\ncouldn't find any font satisfying " err)
371 (write qualifiers err)
374 selected) ; return the topmost.
377 (define (markup-to-properties sheet markup)
378 ;; (display "markup: `")
383 ;; This is hairy. We want to allow:
384 ;; ((foo bar) "text")
385 ;; ((foo (bar . 1)) "text")
388 (if (and (symbol? (car markup))
389 (or (not (pair? (cdr markup)))
390 (number? (cadr markup))))
391 (if (equal? '() (cdr markup))
392 (markup-to-properties sheet (car markup))
395 (if (equal? '() (cdr markup))
396 (markup-to-properties sheet (car markup))
397 (append (markup-to-properties sheet (car markup))
398 (markup-to-properties sheet (cdr markup)))))
400 ;; markup is single abbreviation
401 (let ((entry (assoc markup
403 (append (cdr (assoc 'abbreviation-alist sheet))
404 (cdr (assoc 'style-alist sheet))))))
407 (list (cons markup #t))))))
410 ; fixme, how's this supposed to work?
411 ; and why don't we import font-setting from elt?
412 (define (style-to-font-name sheet style)
413 (let* ((entry (assoc style style-to-font-alist))
414 (qualifiers (if entry (cdr entry) '()))
415 (font (find-first-font qualifiers sheet))
416 (err (current-error-port))
421 (display "\ncouldn't find any font satisfying " err)
422 (write qualifiers err)
425 font) ; return the topmost.
429 (define (test-module)
430 (display (filter-list pair? '(1 2 (1 2) (1 .2)))
431 (display (filter-field 'font-name 'cmbx paper20-style-sheet-alist))
433 (display (qualifiers-to-fontname '((font-name . cmbx)) paper20-style-sheet-alist))
434 (display (style-to-font-name 'paper20 'large))