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 ((-1 medium italic roman cmti 8) . "cmti8")
71 ((0 medium italic roman cmti 10) . "cmti10")
72 ((1 medium italic roman cmti 12) . "cmti12")
73 ((2 bold upright roman cmbx 10) . "cmbx10")
74 ((1 bold upright roman cmbx 12) . "cmbx12")
75 ((2 bold upright roman cmbx 14) . "cmbx14")
76 ((-3 medium upright math msam 10) . "msam10")
77 ((-2 medium upright math msam 10) . "msam10")
78 ((-1 medium upright math msam 10) . "msam10")
79 ((0 medium upright math msam 10) . "msam10")
80 ;; should use the same brace font every where and fix C++ code.
81 ((0 medium upright braces feta-braces 20) . "feta-braces20")
82 ((2 medium upright braces feta-braces 26) . "feta-braces26")
83 ((1 medium upright braces feta-braces 23) . "feta-braces23")
84 ((3 bold italic dynamic feta 16) . "feta-din16")
85 ((2 bold italic dynamic feta 16) . "feta-din16")
86 ((3 bold italic dynamic feta 10) . "feta-din13")
87 ((2 bold italic dynamic feta 10) . "feta-din13")
88 ((1 bold italic dynamic feta 10) . "feta-din12")
89 ((0 bold italic dynamic feta 10) . "feta-din10")
90 ((-1 bold italic dynamic feta 10) . "feta-din8")
91 ((-2 bold italic dynamic feta 10) . "feta-din7")
92 ((-3 bold italic dynamic feta 10) . "feta-din6")
93 ((-4 bold italic dynamic feta 10) . "feta-din5")
94 ((-5 bold italic dynamic feta 10) . "feta-din4")
95 ((0 medium upright music feta 20) . "feta20")
96 ((-1 medium upright music feta 16) . "feta16")
97 ((-2 medium upright music feta 13) . "feta13")
98 ((-3 medium upright music feta 13) . "feta11")
99 ((-4 medium upright music feta 13) . "feta11")
100 ((1 medium upright music feta 23) . "feta23")
101 ((2 medium upright music feta 26) . "feta26")
102 ((-1 medium upright math msam 10) . "msam10")
103 ((-2 medium upright math msam 10) . "msam10")
104 ((-3 medium upright math msam 10) . "msam10")
107 ;; return a FONT-DESCR with relative size decremented by DECREMENT
108 (define (change-relative-size font-desc decrement)
109 (cons (- (car font-desc) decrement) (cdr font-desc))
112 ;; map a function FUNC over the keys of an alist LIST, leaving the vals.
113 (define (map-alist-keys func list)
116 (cons (cons (func (caar list)) (cdar list))
117 (map-alist-keys func (cdr list)))
120 ;; map a function FUNC over the vals of LIST, leaving the keys.
121 (define (map-alist-vals func list)
124 (cons (cons (caar list) (func (cdar list)))
125 (map-alist-vals func (cdr list)))
128 (define (change-style-sheet-relative-size sheet x)
129 (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
132 ;; make style sheet for each paper version.
133 (define font-list-alist
134 (map-alist-vals (lambda (x) (change-style-sheet-relative-size
135 paper20-style-sheet-alist x))
146 (define (make-style-sheet sym)
147 `((fonts . ,(cdr (assoc sym font-list-alist)))
149 . ((font-family . music)
150 (font-relative-size . 0)
151 (font-shape . upright)
152 (font-series . medium)
155 . ((finger . ((font-family . number) (font-relative-size . -3)))
156 (volta . ((font-family . number) (font-relative-size . -2)))
157 (tuplet . ((font-family . roman) (font-shape . italic) (font-relative-size . -1)))
158 (timesig . ((font-family . number) (font-relative-size . 0)))
159 (mmrest . ((font-family . number) (font-relative-size . 1)))
160 (mark . ((font-family . number) (font-relative-size . 1)))
161 (script . ((font-family . roman) (font-relative-size . -1)))
162 (large . ((font-family . roman) (font-relative-size . 1)))
163 (Large . ((font-series . bold) (font-family . roman) (font-relative-size . 2)))
164 (dynamic . ((font-series . bold) (font-family . dynamic) (font-relative-size . 0)))
166 (properties-to-font . ,properties-to-font-name)
168 ;; FIXME: this is a not-so-cool idea to use ALIGN
169 ;; RAISE, LOOKUP, since they are not proper elt-properties,
170 ;; and might interfere with them.
171 (markup-abbrev-to-properties-alist
172 . ((rows . ((align . 0)))
173 (lines . ((align . 1)))
174 (roman . ((font-family . roman)))
175 (music . ((font-family . music)))
176 (finger . ((font-style . finger)))
177 (bold . ((font-series . bold)))
178 (italic . ((font-shape . italic)))
179 (named . ((lookup . name)))
180 (super . ((raise . 1) (font-relative-size . -1)))
181 (sub . ((raise . -1) (font-relative-size . -1)))
182 (text . ((lookup . value)))
191 (define (font-regexp-to-font-name paper regexp)
192 (let ((style-sheet (cdr (assoc paper style-sheet-alist))))
193 (let loop ((fonts style-sheet))
194 (if (string-match regexp (caar fonts))
196 (if (pair? (cdr fonts))
200 ;; reduce the font list by successively applying a font-qualifier.
201 (define (qualifiers-to-fontnames qualifiers font-descr-alist)
202 (if (null? qualifiers)
205 (qualifiers-to-fontnames
207 (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
212 ;; does FONT-DESC satisfy QUALIFIERS?
213 (define (font-qualifies? qualifiers font-desc)
214 (if (null? qualifiers) #t
215 (if (eq? (font-field (caar qualifiers) font-desc) (cdar qualifiers))
216 (font-qualifies? (cdr qualifiers) font-desc)
222 (define (find-first-font qualifiers fonts)
225 (if (font-qualifies? qualifiers (caar fonts))
227 (find-first-font qualifiers (cdr fonts))
232 ;; return a single font from FONTS (or a default, if none found)
233 ;; and warn if the selected font is not unique.
234 (define (select-unique-font qualifiers fonts)
236 (err (current-error-port))
240 (if (not (= (length fonts) 1))
242 (display "\ncouldn't find unique font satisfying " err)
243 (write qualifiers err)
244 (display " found " err)
247 (write (map cdr fonts) err))
252 (cdar fonts)) ; return the topmost.
257 (define (chain-assoc x alist-list)
258 (if (null? alist-list)
261 (handle (assoc x (car alist-list)))
265 (chain-assoc x (cdr alist-list))
272 ;; add support for override by font-name
273 ;; very often-used; hard-code in C++, and use SCM glue code.
275 (define (properties-to-font-name fonts properties-alist-list)
277 ;; change order to change priorities of qualifiers.
278 (q-order '(font-name font-family font-series font-shape font-point-size font-relative-size))
279 (rawqualifiers (map (lambda (x) (chain-assoc x properties-alist-list))
281 (qualifiers (filter-list pair? rawqualifiers))
282 (selected (find-first-font qualifiers fonts))
283 (err (current-error-port))
286 (if (equal? selected "")
288 (display "\ncouldn't find any font satisfying " err)
289 (write qualifiers err)
292 selected) ; return the topmost.
295 (define markup-abbrev-to-properties-alist
297 (map (lambda (x) (cons (car x) (cons 'font-style (car x))))
298 style-to-font-alist)))
300 (define (markup-to-properties markup)
301 ;;(display "markup: `")
306 (let ((entry (assoc markup markup-abbrev-to-properties-alist)))
307 (if entry (cdr entry)
308 (list (cons markup #t))))))
310 ; fixme, how's this supposed to work?
311 ; and why don't we import font-setting from elt?
312 (define (style-to-font-name sheet style)
313 (let* ((entry (assoc style style-to-font-alist))
314 (qualifiers (if entry (cdr entry) '()))
315 (font (find-first-font qualifiers sheet))
316 (err (current-error-port))
321 (display "\ncouldn't find any font satisfying " err)
322 (write qualifiers err)
325 font) ; return the topmost.
331 ; (define (test-module)
332 ; (display (filter-list pair? '(1 2 (1 2) (1 .2)))
333 ;(display (filter-field 'font-name 'cmbx paper20-style-sheet-alist))
335 ; (display (qualifiers-to-fontname '((font-name . cmbx)) paper20-style-sheet-alist))
336 ; (display (style-to-font-name 'paper20 'large))