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 (define (filter-list pred? list)
28 "return that part of LIST for which PRED is true."
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.
45 (define (filter-field field-name value font-descr-alist)
46 "return those descriptions from FONT-DESCR-LIST whose FIELD-NAME matches VALUE"
48 (lambda (x) (eq? value (font-field field-name (car x))))
52 ;; should really have name/pt size at the front of the list.
54 ;; (also tried to vary the order of this list, with little effect)
55 (define paper20-style-sheet-alist
57 ((3 medium upright number feta-nummer 13) . "feta-nummer13")
58 ((2 medium upright number feta-nummer 13) . "feta-nummer13")
59 ((1 medium upright number feta-nummer 11) . "feta-nummer11")
60 ((0 medium upright number feta-nummer 10) . "feta-nummer10")
61 ((-1 medium upright number feta-nummer 8) . "feta-nummer8")
62 ((-2 medium upright number feta-nummer 7) . "feta-nummer7")
63 ((-3 medium upright number feta-nummer 6) . "feta-nummer6")
64 ((-4 medium upright number feta-nummer 5) . "feta-nummer5")
65 ((-5 medium upright number feta-nummer 4) . "feta-nummer4")
67 ((4 medium upright roman cmr 20) . "cmr20")
68 ((3 medium upright roman cmr 16) . "cmr16")
69 ((2 medium upright roman cmr 14) . "cmr14")
70 ((1 medium upright roman cmr 12) . "cmr12")
71 ((0 medium upright roman cmr 10) . "cmr10")
72 ((-1 medium upright roman cmr 8) . "cmr8" )
73 ((-2 medium upright roman cmr 7) . "cmr7" )
74 ((-3 medium upright roman cmr 6) . "cmr6" )
75 ((-4 medium upright roman cmr 5) . "cmr5" )
76 ((-5 medium upright roman cmr 4) . "cmr4" )
78 ((3 medium italic roman cmti 16) . "cmti16")
79 ((2 medium italic roman cmti 14) . "cmti14")
80 ((1 medium italic roman cmti 12) . "cmti12")
81 ((0 medium italic roman cmti 10) . "cmti10")
82 ((-1 medium italic roman cmti 8) . "cmti8")
83 ((-2 medium italic roman cmti 7) . "cmti7")
84 ((-3 medium italic roman cmti 6) . "cmti6")
86 ((2 bold upright roman cmbx 14) . "cmbx14")
87 ((1 bold upright roman cmbx 12) . "cmbx12")
88 ((0 bold upright roman cmbx 10) . "cmbx10")
89 ((-1 bold upright roman cmbx 8) . "cmbx8")
90 ((-2 bold upright roman cmbx 7) . "cmbx7")
92 ;; should use the same brace font every where and fix C++ code.
93 ((2 medium upright braces feta-braces 26) . "feta-braces26")
94 ((1 medium upright braces feta-braces 23) . "feta-braces23")
95 ((0 medium upright braces feta-braces 20) . "feta-braces20")
96 ((-1 medium upright braces feta-braces 16) . "feta-braces16")
97 ((-2 medium upright braces feta-braces 13) . "feta-braces13")
98 ((-3 medium upright braces feta-braces 11) . "feta-braces11")
100 ((3 bold italic dynamic feta-din 13) . "feta-din13")
101 ((2 bold italic dynamic feta-din 13) . "feta-din13")
102 ((1 bold italic dynamic feta-din 11) . "feta-din11")
103 ((0 bold italic dynamic feta-din 10) . "feta-din10")
104 ((-1 bold italic dynamic feta-din 8) . "feta-din8")
105 ((-2 bold italic dynamic feta-din 7) . "feta-din7")
106 ((-3 bold italic dynamic feta-din 6) . "feta-din6")
107 ((-4 bold italic dynamic feta-din 5) . "feta-din5")
108 ((-5 bold italic dynamic feta-din 4) . "feta-din4")
110 ((2 medium upright music feta 26) . "feta26")
111 ((1 medium upright music feta 23) . "feta23")
112 ((0 medium upright music feta 20) . "feta20")
113 ((-0.5 medium upright music feta 20) . "feta19")
114 ((-1 medium upright music feta 16) . "feta16")
115 ((-2 medium upright music feta 13) . "feta13")
116 ((-3 medium upright music feta 11) . "feta11")
117 ((-4 medium upright music feta 11) . "feta11")
119 ((0 medium upright math msam 10) . "msam10")
120 ((-1 medium upright math msam 10) . "msam10")
121 ((-2 medium upright math msam 10) . "msam10")
122 ((-3 medium upright math msam 10) . "msam10")
126 (define (change-relative-size font-desc decrement)
127 "return a FONT-DESCR with relative size decremented by DECREMENT"
128 (cons (- (car font-desc) decrement) (cdr font-desc))
132 (define (map-alist-keys func list)
133 "map a function FUNC over the keys of an alist LIST, leaving the vals. "
136 (cons (cons (func (caar list)) (cdar list))
137 (map-alist-keys func (cdr list)))
141 (define (map-alist-vals func list)
142 "map a function FUNC over the vals of LIST, leaving the keys."
145 (cons (cons (caar list) (func (cdar list)))
146 (map-alist-vals func (cdr list)))
149 (define (change-style-sheet-relative-size sheet x)
150 (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
153 ;; make style sheet for each paper version.
154 (define font-list-alist
155 (map-alist-vals (lambda (x) (change-style-sheet-relative-size
156 paper20-style-sheet-alist x))
168 (define (make-style-sheet sym)
169 `((fonts . ,(cdr (assoc sym font-list-alist)))
171 . ((font-family . music)
172 (font-relative-size . 0)
173 (font-shape . upright)
174 (font-series . medium)
177 . ((finger . ((font-family . number) (font-relative-size . -3)))
178 (volta . ((font-family . number) (font-relative-size . -2)))
179 (tuplet . ((font-family . roman) (font-shape . italic) (font-relative-size . -1)))
181 (timesig . ((font-family . number) (font-relative-size . 0)))
182 (timesig-symbol . ((font-family . music) (font-relative-size . 0)))
184 (mmrest . ((font-family . number) (font-relative-size . 1)))
185 (mmrest-symbol . ((font-family . music) (font-relative-size . 0)))
187 (mark . ((font-family . number) (font-relative-size . 1)))
188 (script . ((font-family . roman) (font-relative-size . -1)))
189 (large . ((font-family . roman) (font-relative-size . 1)))
190 (Large . ((font-series . bold) (font-family . roman) (font-relative-size . 2)))
191 (dynamic . ((font-series . bold) (font-family . dynamic) (font-relative-size . 0)))
193 (properties-to-font .
194 ,Font_interface::properties_to_font_name)
196 ;; FIXME: this is a not-so-cool idea to use ALIGN
197 ;; RAISE, LOOKUP, since they are not proper elt-properties,
198 ;; and might interfere with them.
199 (markup-to-properties . ,markup-to-properties)
201 . ((rows . ((align . 0)))
202 (lines . ((align . 1)))
203 (roman . ((font-family . roman)))
204 (music . ((font-family . music) (font-shape . upright)))
205 (finger . ((font-style . finger)))
206 (bold . ((font-series . bold)))
207 (italic . ((font-shape . italic)))
208 (named . ((lookup . name)))
209 (super . ((raise . 1) (font-relative-size . -1)))
210 (sub . ((raise . -1) (font-relative-size . -1)))
211 (text . ((lookup . value)))
218 (define (qualifiers-to-fontnames qualifiers font-descr-alist)
219 " reduce the font list by successively applying a font-qualifier."
220 (if (null? qualifiers)
223 (qualifiers-to-fontnames
225 (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
229 (define (font-qualifies? qualifiers font-desc)
230 "does FONT-DESC satisfy QUALIFIERS?"
231 (if (null? qualifiers) #t
232 (if (eq? (font-field (caar qualifiers) font-desc) (cdar qualifiers))
233 (font-qualifies? (cdr qualifiers) font-desc)
239 (define (find-first-font qualifiers fonts)
242 (if (font-qualifies? qualifiers (caar fonts))
244 (find-first-font qualifiers (cdr fonts))
249 (define (select-unique-font qualifiers fonts)
250 "return a single font from FONTS (or a default, if none found)
251 and warn if the selected font is not unique.
254 (err (current-error-port))
258 (if (not (= (length fonts) 1))
260 (display "\ncouldn't find unique font satisfying " err)
261 (write qualifiers err)
262 (display " found " err)
265 (write (map cdr fonts) err))
270 (cdar fonts)) ; return the topmost.
275 (define (chain-assoc x alist-list)
276 (if (null? alist-list)
279 (handle (assoc x (car alist-list)))
283 (chain-assoc x (cdr alist-list))
290 ;; the C++ version in font-interface.cc is usually used.
291 (define (properties-to-font-name fonts properties-alist-list)
293 ;; change order to change priorities of qualifiers.
294 (q-order '(font-name font-family font-series font-shape font-point-size font-relative-size))
295 (rawqualifiers (map (lambda (x) (chain-assoc x properties-alist-list))
297 (qualifiers (filter-list pair? rawqualifiers))
298 (selected (find-first-font qualifiers fonts))
299 (err (current-error-port))
302 (if (equal? selected "")
304 (display "\ncouldn't find any font satisfying " err)
305 (write qualifiers err)
308 selected) ; return the topmost.
311 (define (markup-to-properties sheet markup)
312 ;;(display "markup: `")
317 (let ((entry (assoc markup
319 (append (cdr (assoc 'abbreviation-alist sheet))
320 (cdr (assoc 'style-alist sheet))))))
323 (list (cons markup #t))))))
325 ; fixme, how's this supposed to work?
326 ; and why don't we import font-setting from elt?
327 (define (style-to-font-name sheet style)
328 (let* ((entry (assoc style style-to-font-alist))
329 (qualifiers (if entry (cdr entry) '()))
330 (font (find-first-font qualifiers sheet))
331 (err (current-error-port))
336 (display "\ncouldn't find any font satisfying " err)
337 (write qualifiers err)
340 font) ; return the topmost.
344 (define (test-module)
345 (display (filter-list pair? '(1 2 (1 2) (1 .2)))
346 (display (filter-field 'font-name 'cmbx paper20-style-sheet-alist))
348 (display (qualifiers-to-fontname '((font-name . cmbx)) paper20-style-sheet-alist))
349 (display (style-to-font-name 'paper20 'large))