1 ;;;; font.scm -- construct font trees
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 ;; As an excercise, do it with records.
8 ;; Should use GOOPS, really.
12 ;; lookup-font should be written in C.
14 ;; should dump tree to .texi as internal documentation
16 ;; * should extract design sizes from fonts: fonts should
17 ;; be read off the disk, on demand, something like:
19 ;; cmr -> ((font-load "cmr6") (font-load "cmr8") .. )
22 (define-class <Font-tree-element>
26 (define-class <Font-tree-leaf> (<Font-tree-element>)
27 (default-size #:init-keyword #:default-size)
28 (size-vector #:init-keyword #:size-vector))
30 (define-class <Font-tree-node> (<Font-tree-element>)
31 (qualifier #:init-keyword #:qualifier #:accessor font-qualifier)
32 (default #:init-keyword #:default #:accessor font-default)
33 (children #:init-keyword #:children #:accessor font-children))
35 (define (make-font-tree-leaf size size-font-vector)
36 (make <Font-tree-leaf> #:default-size size #:size-vector size-font-vector))
38 (define (make-font-tree-node
40 (make <Font-tree-node>
43 #:children (make-hash-table 11)))
45 (define-method (display (leaf <Font-tree-leaf>) port)
46 (map (lambda (x) (display x port))
48 "Font-size-family: \n"
49 (slot-ref leaf 'default-size)
50 (slot-ref leaf 'size-vector))))
52 (define-method (display (node <Font-tree-node>) port)
59 "Font_node { \nqual: "
67 (display (car x) port)
69 (display (cdr x) port))
70 (hash-table->alist (font-children node)))
74 (define default-qualifier-order
75 '(font-encoding font-family font-shape font-series))
77 (define-method (add-font (node <Font-tree-node>) fprops size-family)
78 (define (assoc-delete key alist)
79 (assoc-remove! (list-copy alist) key))
80 (define (make-node fprops size-family)
82 (make-font-tree-leaf (car size-family) (cdr size-family))
83 (let* ((qual (next-qualifier default-qualifier-order fprops)))
84 (make-font-tree-node qual
85 (assoc-get qual fprops)))))
87 (define (next-qualifier order props)
89 ((and (null? props) (null? order))
91 ((null? props) (car order))
92 ((null? order) (caar props))
94 (if (assoc-get (car order) props)
96 (next-qualifier (cdr order) props)))))
98 (let* ((q (font-qualifier node))
99 (d (font-default node))
100 (v (assoc-get q fprops d))
101 (new-fprops (assoc-delete q fprops))
102 (child (hashq-ref (slot-ref node 'children)
108 (set! child (make-node new-fprops size-family))
109 (hashq-set! (slot-ref node 'children) v child)))
110 (if (pair? new-fprops)
111 (add-font child new-fprops size-family))))
114 (define-method (add-font (node <Font-tree-leaf>) fprops size-family)
115 (throw "must add to node, not leaf"))
118 (define-method (g-lookup-font (node <Font-tree-node>) alist-chain)
119 (let* ((qual (font-qualifier node))
120 (def (font-default node))
121 (val (chain-assoc-get qual alist-chain def))
122 (desired-child (hashq-ref (font-children node) val)))
125 (g-lookup-font desired-child alist-chain)
126 (g-lookup-font (hashq-ref (font-children node) def) alist-chain))))
129 (define-method (g-lookup-font (node <Font-tree-leaf>) alist-chain)
132 ;; two step call is handy for debugging.
133 (define (lookup-font node alist-chain)
134 (g-lookup-font node alist-chain))
137 ; Each size family is a vector of fonts, loaded with a delay.
138 ; The vector should be sorted according to ascending design size.
140 (define feta-alphabet-size-vector
143 (cons (ly:pt (cdr tup))
144 (format "feta-alphabet~a ~a"
156 (define-public (add-music-fonts node factor)
160 (list (cons 'font-encoding (car x)))
161 (cons (* factor (cadr x))
163 `((fetaDynamic ,(ly:pt 20.0) ,feta-alphabet-size-vector)
164 (fetaNumber ,(ly:pt 20.0) ,feta-alphabet-size-vector)
165 (fetaMusic ,(ly:pt 20.0)
166 #(,(delay (ly:font-load "emmentaler-11"))
167 ,(delay (ly:font-load "emmentaler-13"))
168 ,(delay (ly:font-load "emmentaler-14"))
169 ,(delay (ly:font-load "emmentaler-16"))
170 ,(delay (ly:font-load "emmentaler-18"))
171 ,(delay (ly:font-load "emmentaler-20"))
172 ,(delay (ly:font-load "emmentaler-23"))
173 ,(delay (ly:font-load "emmentaler-26"))))
175 (fetaBraces ,(ly:pt 20.0) #(,(delay
176 (ly:font-load "aybabtu")))))))
178 (define-public (add-cmr-fonts node factor)
179 (add-font node '((font-encoding . TeX-math))
180 `(,(* factor 10) . #(,(delay (ly:font-load "msam10")))))
183 (add-font node `((font-encoding . TeX-text)
184 (font-series . ,(vector-ref (car x) 2))
185 (font-shape . ,(vector-ref (car x) 1))
186 (font-family . ,(vector-ref (car x) 0)))
187 (cons (* factor (cadr x))
189 `((#(roman upright medium)
190 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmr6"))
191 ,(delay (ly:font-load "cmr8"))
192 ,(delay (ly:font-load "cmr10"))
193 ,(delay (ly:font-load "cmr17")))))
194 (#(roman upright bold)
195 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmbx6"))
196 ,(delay (ly:font-load "cmbx8"))
197 ,(delay (ly:font-load "cmbx10"))
198 ,(delay (ly:font-load "cmbx12")))))
199 (#(roman italic medium)
200 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmti7"))
201 ,(delay (ly:font-load "cmti10"))
202 ,(delay (ly:font-load "cmti12")))))
203 (#(roman italic bold)
204 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmbxti8"))
205 ,(delay (ly:font-load "cmbxti10"))
206 ,(delay (ly:font-load "cmbxti14")))))
207 (#(roman caps medium)
208 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmcsc10")))))
209 (#(roman upright bold-narrow )
210 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmb10")))))
211 (#(sans upright medium)
212 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmss8"))
213 ,(delay (ly:font-load "cmss10"))
214 ,(delay (ly:font-load "cmss12"))
215 ,(delay (ly:font-load "cmss17")))))
216 (#(typewriter upright medium)
217 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "cmtt8"))
218 ,(delay (ly:font-load "cmtt10"))
219 ,(delay (ly:font-load "cmtt12"))))))))
221 ;; Debian lmodern font support.
222 (define-public (add-cork-lm-fonts node factor)
225 (add-font node `((font-encoding . cork-lm)
226 (font-series . ,(vector-ref (car x) 2))
227 (font-shape . ,(vector-ref (car x) 1))
228 (font-family . ,(vector-ref (car x) 0)))
229 (cons (* factor (cadr x)) (cddr x))))
230 `((#(roman upright medium)
231 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmr6"))
232 ,(delay (ly:font-load "lmr8"))
233 ,(delay (ly:font-load "lmr10"))
234 ,(delay (ly:font-load "lmr17")))))
235 (#(roman upright bold)
236 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmbx6"))
237 ,(delay (ly:font-load "lmbx8"))
238 ,(delay (ly:font-load "lmbx10"))
239 ,(delay (ly:font-load "lmbx12")))))
240 (#(roman italic medium)
241 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmri7"))
242 ,(delay (ly:font-load "lmri10"))
243 ,(delay (ly:font-load "lmri12")))))
244 (#(roman italic bold)
245 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmbxi10")))))
246 (#(roman caps medium)
247 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmcsc10")))))
248 (#(roman upright bold-narrow )
249 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmb10")))))
250 (#(sans upright medium)
251 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmss8"))
252 ,(delay (ly:font-load "lmss10"))
253 ,(delay (ly:font-load "lmss12"))
254 ,(delay (ly:font-load "lmss17")))))
255 (#(sans upright bold)
256 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmssbx10")))))
258 (#(typewriter upright medium)
259 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "lmtt8"))
260 ,(delay (ly:font-load "lmtt10"))
261 ,(delay (ly:font-load "lmtt12"))))))))
263 ;; ec-fonts-mftraced font support.
264 (define-public (add-ec-fonts node factor)
266 (lambda (x) (add-font node
267 `((font-encoding . Extended-TeX-Font-Encoding---Latin)
268 (font-series . ,(vector-ref (car x) 2))
269 (font-shape . ,(vector-ref (car x) 1))
270 (font-family . ,(vector-ref (car x) 0)))
271 (cons (* factor (cadr x)) (cddr x))))
273 `((#(roman upright medium)
274 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ecrm6"))
275 ,(delay (ly:font-load "ecrm8"))
276 ,(delay (ly:font-load "ecrm10"))
277 ,(delay (ly:font-load "ecrm17")))))
278 (#(roman upright bold)
279 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ecbx6"))
280 ,(delay (ly:font-load "ecbx8"))
281 ,(delay (ly:font-load "ecbx10"))
282 ,(delay (ly:font-load "ecbx12")))))
283 (#(roman italic medium)
284 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ecti7"))
285 ,(delay (ly:font-load "ecti10"))
286 ,(delay (ly:font-load "ecti12")))))
287 (#(roman italic bold)
288 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ecbi8"))
289 ,(delay (ly:font-load "ecbi10"))
290 ,(delay (ly:font-load "ecbi14")))))
291 (#(roman caps medium)
292 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "eccc10")))))
293 (#(roman slanted-caps medium)
294 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ecsc10")))))
295 (#(roman upright bold-narrow )
296 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ecrb10")))))
297 (#(sans upright medium)
298 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ecss8"))
299 ,(delay (ly:font-load "ecss10"))
300 ,(delay (ly:font-load "ecss12"))
301 ,(delay (ly:font-load "ecss17")))))
302 (#(typewriter upright medium)
303 . (,(ly:pt 10.0) . #(,(delay (ly:font-load "ectt8"))
304 ,(delay (ly:font-load "ectt10"))
305 ,(delay (ly:font-load "ectt12"))))))))
307 (define-public (add-pango-fonts node lily-family family factor)
308 (define (add-node shape series)
310 `((font-family . ,lily-family)
311 (font-shape . ,shape)
312 (font-series . ,series)
313 (font-encoding . latin1) ;; ugh.
316 `(,(ly:pt (* factor 12.0))
319 (ly:make-pango-description-string
320 `(((font-family . ,family)
321 (font-series . ,series)
322 (font-shape . ,shape)))
325 (add-node 'upright 'normal)
326 (add-node 'upright 'bold)
327 (add-node 'italic 'normal)
328 (add-node 'italic 'bold)
331 (define-public (make-cmr-tree factor)
332 (let ((n (make-font-tree-node 'font-encoding 'fetaMusic)))
333 (add-music-fonts n factor)
334 (add-cmr-fonts n factor)
335 (if (ly:kpathsea-find-file "lmr10.pfb")
336 (add-cork-lm-fonts n factor))
337 (if (ly:kpathsea-find-file "ecrm10.pfa")
338 (add-ec-fonts n factor))
341 (define-public (make-century-schoolbook-tree factor)
342 (let ((n (make-font-tree-node 'font-encoding 'fetaMusic)))
343 (add-music-fonts n factor)
344 (add-pango-fonts n 'roman "Century Schoolbook L" factor)
345 (add-pango-fonts n 'sans "Luxi Sans" factor)
348 (define-public (magstep x)
349 (exp (* (/ x 6) (log 2))))