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 7) . "feta-nummer7")
61 ((-3 medium upright number feta-nummer 6) . "feta-nummer6")
62 ((-4 medium upright number feta-nummer 5) . "feta-nummer5")
63 ((-5 medium upright number feta-nummer 4) . "feta-nummer4")
65 ((4 medium upright roman cmr 20) . "cmr20")
66 ((3 medium upright roman cmr 16) . "cmr16")
67 ((2 medium upright roman cmr 14) . "cmr14")
68 ((1 medium upright roman cmr 12) . "cmr12")
69 ((0 medium upright roman cmr 10) . "cmr10")
70 ((-1 medium upright roman cmr 8) . "cmr8" )
71 ((-2 medium upright roman cmr 7) . "cmr7" )
72 ((-3 medium upright roman cmr 6) . "cmr6" )
73 ((-4 medium upright roman cmr 5) . "cmr5" )
74 ((-5 medium upright roman cmr 4) . "cmr4" )
76 ((3 medium italic roman cmti 16) . "cmti16")
77 ((2 medium italic roman cmti 14) . "cmti14")
78 ((1 medium italic roman cmti 12) . "cmti12")
79 ((0 medium italic roman cmti 10) . "cmti10")
80 ((-1 medium italic roman cmti 8) . "cmti8")
81 ((-2 medium italic roman cmti 7) . "cmti7")
82 ((-3 medium italic roman cmti 6) . "cmti6")
84 ((2 bold upright roman cmbx 14) . "cmbx14")
85 ((1 bold upright roman cmbx 12) . "cmbx12")
86 ((0 bold upright roman cmbx 10) . "cmbx10")
87 ((-1 bold upright roman cmbx 8) . "cmbx8")
88 ((-2 bold upright roman cmbx 7) . "cmbx7")
90 ;; should use the same brace font every where and fix C++ code.
91 ((2 medium upright braces feta-braces 26) . "feta-braces26")
92 ((1 medium upright braces feta-braces 23) . "feta-braces23")
93 ((0 medium upright braces feta-braces 20) . "feta-braces20")
94 ((-1 medium upright braces feta-braces 16) . "feta-braces16")
95 ((-2 medium upright braces feta-braces 13) . "feta-braces13")
96 ((-3 medium upright braces feta-braces 11) . "feta-braces11")
98 ((3 bold italic dynamic feta-din 13) . "feta-din13")
99 ((2 bold italic dynamic feta-din 13) . "feta-din13")
100 ((1 bold italic dynamic feta-din 11) . "feta-din11")
101 ((0 bold italic dynamic feta-din 10) . "feta-din10")
102 ((-1 bold italic dynamic feta-din 8) . "feta-din8")
103 ((-2 bold italic dynamic feta-din 7) . "feta-din7")
104 ((-3 bold italic dynamic feta-din 6) . "feta-din6")
105 ((-4 bold italic dynamic feta-din 5) . "feta-din5")
106 ((-5 bold italic dynamic feta-din 4) . "feta-din4")
108 ((2 medium upright music feta 26) . "feta26")
109 ((1 medium upright music feta 23) . "feta23")
110 ((0 medium upright music feta 20) . "feta20")
111 ((-0.5 medium upright music feta 20) . "feta19")
112 ((-1 medium upright music feta 16) . "feta16")
113 ((-2 medium upright music feta 13) . "feta13")
114 ((-3 medium upright music feta 11) . "feta11")
115 ((-4 medium upright music feta 11) . "feta11")
117 ((0 medium upright math msam 10) . "msam10")
118 ((-1 medium upright math msam 10) . "msam10")
119 ((-2 medium upright math msam 10) . "msam10")
120 ((-3 medium upright math msam 10) . "msam10")
123 ;; return a FONT-DESCR with relative size decremented by DECREMENT
124 (define (change-relative-size font-desc decrement)
125 (cons (- (car font-desc) decrement) (cdr font-desc))
128 ;; map a function FUNC over the keys of an alist LIST, leaving the vals.
129 (define (map-alist-keys func list)
132 (cons (cons (func (caar list)) (cdar list))
133 (map-alist-keys func (cdr list)))
136 ;; map a function FUNC over the vals of LIST, leaving the keys.
137 (define (map-alist-vals func list)
140 (cons (cons (caar list) (func (cdar list)))
141 (map-alist-vals func (cdr list)))
144 (define (change-style-sheet-relative-size sheet x)
145 (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
148 ;; make style sheet for each paper version.
149 (define font-list-alist
150 (map-alist-vals (lambda (x) (change-style-sheet-relative-size
151 paper20-style-sheet-alist x))
163 (define (make-style-sheet sym)
164 `((fonts . ,(cdr (assoc sym font-list-alist)))
166 . ((font-family . music)
167 (font-relative-size . 0)
168 (font-shape . upright)
169 (font-series . medium)
172 . ((finger . ((font-family . number) (font-relative-size . -3)))
173 (volta . ((font-family . number) (font-relative-size . -2)))
174 (tuplet . ((font-family . roman) (font-shape . italic) (font-relative-size . -1)))
175 (timesig . ((font-family . number) (font-relative-size . 0)))
177 (mmrest . ((font-family . number) (font-relative-size . 1)))
178 (mmrest-symbol . ((font-family . music) (font-relative-size . 0)))
180 (mark . ((font-family . number) (font-relative-size . 1)))
181 (script . ((font-family . roman) (font-relative-size . -1)))
182 (large . ((font-family . roman) (font-relative-size . 1)))
183 (Large . ((font-series . bold) (font-family . roman) (font-relative-size . 2)))
184 (dynamic . ((font-series . bold) (font-family . dynamic) (font-relative-size . 0)))
186 (properties-to-font . ,properties-to-font-name)
188 ;; FIXME: this is a not-so-cool idea to use ALIGN
189 ;; RAISE, LOOKUP, since they are not proper elt-properties,
190 ;; and might interfere with them.
191 (markup-to-properties . ,markup-to-properties)
193 . ((rows . ((align . 0)))
194 (lines . ((align . 1)))
195 (roman . ((font-family . roman)))
196 (music . ((font-family . music) (font-shape . upright)))
197 (finger . ((font-style . finger)))
198 (bold . ((font-series . bold)))
199 (italic . ((font-shape . italic)))
200 (named . ((lookup . name)))
201 (super . ((raise . 1) (font-relative-size . -1)))
202 (sub . ((raise . -1) (font-relative-size . -1)))
203 (text . ((lookup . value)))
210 ;; reduce the font list by successively applying a font-qualifier.
211 (define (qualifiers-to-fontnames qualifiers font-descr-alist)
212 (if (null? qualifiers)
215 (qualifiers-to-fontnames
217 (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
222 ;; does FONT-DESC satisfy QUALIFIERS?
223 (define (font-qualifies? qualifiers font-desc)
224 (if (null? qualifiers) #t
225 (if (eq? (font-field (caar qualifiers) font-desc) (cdar qualifiers))
226 (font-qualifies? (cdr qualifiers) font-desc)
232 (define (find-first-font qualifiers fonts)
235 (if (font-qualifies? qualifiers (caar fonts))
237 (find-first-font qualifiers (cdr fonts))
242 ;; return a single font from FONTS (or a default, if none found)
243 ;; and warn if the selected font is not unique.
244 (define (select-unique-font qualifiers fonts)
246 (err (current-error-port))
250 (if (not (= (length fonts) 1))
252 (display "\ncouldn't find unique font satisfying " err)
253 (write qualifiers err)
254 (display " found " err)
257 (write (map cdr fonts) err))
262 (cdar fonts)) ; return the topmost.
267 (define (chain-assoc x alist-list)
268 (if (null? alist-list)
271 (handle (assoc x (car alist-list)))
275 (chain-assoc x (cdr alist-list))
282 ;; add support for override by font-name
283 ;; very often-used; hard-code in C++, and use SCM glue code.
285 (define (properties-to-font-name fonts properties-alist-list)
287 ;; change order to change priorities of qualifiers.
288 (q-order '(font-name font-family font-series font-shape font-point-size font-relative-size))
289 (rawqualifiers (map (lambda (x) (chain-assoc x properties-alist-list))
291 (qualifiers (filter-list pair? rawqualifiers))
292 (selected (find-first-font qualifiers fonts))
293 (err (current-error-port))
296 (if (equal? selected "")
298 (display "\ncouldn't find any font satisfying " err)
299 (write qualifiers err)
302 selected) ; return the topmost.
305 (define (markup-to-properties sheet markup)
306 ;;(display "markup: `")
311 (let ((entry (assoc markup
313 (append (cdr (assoc 'abbreviation-alist sheet))
314 (cdr (assoc 'style-alist sheet))))))
317 (list (cons markup #t))))))
319 ; fixme, how's this supposed to work?
320 ; and why don't we import font-setting from elt?
321 (define (style-to-font-name sheet style)
322 (let* ((entry (assoc style style-to-font-alist))
323 (qualifiers (if entry (cdr entry) '()))
324 (font (find-first-font qualifiers sheet))
325 (err (current-error-port))
330 (display "\ncouldn't find any font satisfying " err)
331 (write qualifiers err)
334 font) ; return the topmost.
340 ; (define (test-module)
341 ; (display (filter-list pair? '(1 2 (1 2) (1 .2)))
342 ;(display (filter-field 'font-name 'cmbx paper20-style-sheet-alist))
344 ; (display (qualifiers-to-fontname '((font-name . cmbx)) paper20-style-sheet-alist))
345 ; (display (style-to-font-name 'paper20 'large))