1 ;;;; output-ps.scm -- implement Scheme output routines for PostScript
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 ;;;; Note: currently misused as testbed for titles with markup, see
9 ;;;; input/test/title-markup.ly
12 ;;;; * special characters, encoding.
13 ;;;; + implement encoding switch (switches? input/output??),
14 ;;;; + move encoding definitions to ENCODING.ps files, or
15 ;;;; + find out which program's PS(?) encoding code we can use?
16 ;;;; * text setting, kerning.
17 ;;;; * document output-interface
19 ;;(if (not safe-mode?)
20 ;; (debug-enable 'backtrace))
21 (debug-enable 'backtrace)
23 (define-module (scm output-ps))
24 (define this-module (current-module))
32 (define (expression->string expr)
33 (eval expr this-module))
35 ;;; Output interface entry
36 (define (output-expression expr port)
37 (display (expression->string expr) port))
41 ;; alist containing fontname -> fontcommand assoc (both strings)
43 (define page-number 0)
44 (define font-name-alist '())
46 ;; /lilypondpaperoutputscale 1.75729901757299 def
47 ;;/lily-output-units 2.83464 def %% milimeter
48 ;;/output-scale lilypondpaperoutputscale lily-output-units mul def
50 ;; output-scale = 1.75729901757299 * 2.83464 = 4.9813100871731003736
52 (define OUTPUT-SCALE 4.98)
55 ;;; helper functions, not part of output interface
56 (define (escape-parentheses s)
57 (regexp-substitute/global #f "(^|[^\\])([\\(\\)])" s 'pre 1 "\\" 2 'post))
59 (define (offset-add a b)
60 (cons (+ (car a) (car b))
64 (define font-encoding-alist
65 '(("ecrm12" . "ISOLatin1Encoding")
66 ("ecmb12" . "ISOLatin1Encoding")))
68 (define (ps-encoding text)
69 (escape-parentheses text))
72 (define (ps-string-def prefix key val)
73 (string-append "/" prefix (symbol->string key) " ("
74 (escape-parentheses val)
77 (define (ps-number-def prefix key val)
78 (let ((s (if (integer? val)
80 (number->string (exact->inexact val)))))
81 (string-append "/" prefix (symbol->string key) " " s " def\n")))
83 (define (tex-font? fontname)
84 (equal? (substring fontname 0 2) "cm"))
88 ;;; Lily output interface, PostScript implementation --- cleanup and docme
91 ;;; Output-interface functions
92 (define (beam width slope thick blot)
94 (numbers->string (list slope width thick blot)) " draw_beam" ))
97 (define (bezier-sandwich l thick)
99 (apply string-append (map number-pair->string l))
100 (ly:number->string thick)
101 " draw_bezier_sandwich "))
103 (define (bracket arch_angle arch_width arch_height height arch_thick thick)
106 (list arch_angle arch_width arch_height height arch_thick thick))
111 "(\\" (inexact->string i 8) ") show " ))
114 (string-append "% " s "\n"))
116 (define (dashed-line thick on off dx dy)
118 (ly:number->string dx)
120 (ly:number->string dy)
122 (ly:number->string thick)
124 (ly:number->string on)
126 (ly:number->string off)
127 " ] 0 draw_dashed_line"))
129 ;; what the heck is this interface ?
130 (define (dashed-slur thick dash l)
132 (apply string-append (map number-pair->string l))
133 (ly:number->string thick)
135 (ly:number->string dash)
138 (ly:number->string (* 10 thick))
139 " ] 0 draw_dashed_slur"))
141 (define (define-fonts internal-external-name-mag-pairs)
143 (define (fontname->designsize fontname)
144 (let ((i (string-index fontname char-numeric?)))
145 (string->number (substring fontname i))))
147 (define (define-font command fontname scaling)
149 "/" command " { /" fontname " findfont "
150 (ly:number->string scaling) " output-scale div scalefont } bind def\n"))
152 (define (reencode-font raw encoding command)
154 raw " " encoding " /" command " reencode-font\n"
155 "/" command "{ /" command " findfont 1 scalefont } bind def\n"))
157 ;; frobnicate NAME to jibe with external definitions.
158 (define (possibly-mangle-fontname fontname)
160 ((tex-font? fontname)
161 ;; FIXME: we need proper Fontmap for CM fonts, like so:
162 ;; /CMR10 (cmr10.pfb);
163 ;; (string-upcase fontname)
164 (string-append fontname ".pfb"))
165 ((or (equal? (substring fontname 0 4) "feta")
166 (equal? (substring fontname 0 4) "parm"))
167 (regexp-substitute/global
168 #f "(feta|parmesan)([a-z-]*)([0-9]+)"
169 fontname 'pre "GNU-LilyPond-" 1 2 "-" 3 'post))
172 ;; (define (font-load-command name-mag command)
173 (define (font-load-command lst)
174 (let* ((key-name-size (car lst))
176 (value-name-size (car value))
177 (command (cdr value))
178 (fontname (car value-name-size))
179 (mangled (possibly-mangle-fontname fontname))
180 (encoding (assoc-get fontname font-encoding-alist))
181 (designsize (if (tex-font? fontname)
182 (/ 12 (fontname->designsize fontname))
183 ;; This is about 12/20 :-)
184 (cdr key-name-size)))
185 (fontsize (cdr value-name-size))
186 (scaling (* 12 (/ fontsize designsize)))
187 (scaling (/ fontsize (/ designsize 12))))
193 (format (current-error-port) "key-name-size ~S\n" key-name-size)
194 (format (current-error-port) "value ~S\n" value)
195 (format (current-error-port) "value-name-size ~S\n" value-name-size)
196 (format (current-error-port) "command ~S\n" command)
197 (format (current-error-port) "designsize ~S\n" designsize)
198 (format (current-error-port) "fontname ~S\n" fontname)
199 (format (current-error-port) "mangled ~S\n" mangled)
200 (format (current-error-port) "fontsize ~S\n" fontsize)
201 (format (current-error-port) "scaling ~S\n" scaling)))
204 ;; FIXME: should rather tag encoded font
205 (let ((raw (string-append command "-raw")))
207 (define-font raw mangled scaling)
208 (reencode-font raw encoding command)))
209 (define-font command mangled scaling))))
211 (define (ps-encoded-fontswitch name-mag-pair)
212 (let* ((key (car name-mag-pair))
213 (value (cdr name-mag-pair))
214 (fontname (car value))
215 (scaling (cdr value)))
216 (cons key (cons value
218 "lilyfont" fontname "-" (number->string scaling))))))
220 (set! font-name-alist
221 (map ps-encoded-fontswitch internal-external-name-mag-pairs))
222 (apply string-append (map font-load-command font-name-alist)))
224 (define (define-origin file line col) "")
226 (define (dot x y radius)
230 (list x y radius)) " draw_dot"))
232 (define (draw-line thick x1 y1 x2 y2)
236 (ly:number->string thick)
238 (ly:number->string x1)
240 (ly:number->string y1)
242 (ly:number->string x2)
244 (ly:number->string y2)
248 "\nend-lilypond-output\n")
250 (define (ez-ball ch letter-col ball-col)
253 (numbers->string (list letter-col ball-col))
254 " /Helvetica-Bold " ;; ugh
257 (define (filledbox breapth width depth height)
258 (string-append (numbers->string (list breapth width depth height))
261 (define (fontify name-mag-pair exp)
263 (define (select-font name-mag-pair)
264 (let ((c (assoc name-mag-pair font-name-alist)))
267 (string-append " " (cddr c) " setfont ")
270 (format "Programming error: No such font: ~S" name-mag-pair))
273 (string-append (select-font name-mag-pair) exp))
275 (define (header creator time-stamp page-count-)
276 (set! page-count page-count-)
280 "%%Creator: " creator " " time-stamp "\n"
281 "%%Pages: " (number->string page-count) "\n"
282 "%%PageOrder: Ascend\n"
283 ;;(string-append "GNU LilyPond (" (lilypond-version) "), ")
284 ;; (strftime "%c" (localtime (current-time))))
285 ;; FIXME: duplicated in every backend
288 (string-append "Engraved by LilyPond (version " (lilypond-version) ")"))))
292 (ly:gulp-file "lilyponddefs.ps")
293 (ly:gulp-file "music-drawing-routines.ps")))
295 (define (horizontal-line x1 x2 th)
296 (draw-line th x1 0 x2 0))
298 (define (lily-def key val)
299 (let ((prefix "lilypondpaper"))
301 (substring key 0 (min (string-length prefix) (string-length key)))
303 (string-append "/" key " {" val "} bind def\n")
304 (string-append "/" key " (" val ") def\n"))))
306 (define (no-origin) "")
308 ;; FIXME: duplictates output-scopes, duplicated in other backends
309 ;; FIXME: silly interface name
310 (define (output-paper-def pd)
311 (let ((prefix "lilypondpaper"))
313 (define (scope-entry->string key var)
314 (let ((val (variable-ref var)))
316 ((string? val) (ps-string-def prefix key val))
317 ((number? val) (ps-number-def prefix key val))
322 (module-map scope-entry->string (ly:output-def-scope pd)))))
324 ;; FIXME: duplicated in other output backends
325 ;; FIXME: silly interface name
326 (define (output-scopes paper scopes fields basename)
327 (let ((prefix "lilypond"))
329 ;; FIXME: duplicates output-paper's scope-entry->string, mostly
330 (define (scope-entry->string key var)
331 (if (variable-bound? var)
332 (let ((val (variable-ref var)))
333 (if (and (memq key fields) (string? val))
334 (header-to-file basename key val))
336 ((string? val) (ps-string-def prefix key val))
337 ((number? val) (ps-number-def prefix key val))
341 (define (output-scope scope)
342 (apply string-append (module-map scope-entry->string scope)))
344 (string-append (apply string-append (map output-scope scopes)))))
346 ;; hmm, looks like recursing call is always last statement, does guile
348 (define (output-stencil port expr offset)
350 (let ((head (car expr)))
352 ((ly:input-location? head)
353 (display (apply define-origin (ly:input-location head)) port)
354 (output-stencil port (cadr expr) offset))
355 ((eq? head 'no-origin)
356 (display (expression->string head) port)
357 (output-stencil port (cadr expr) offset))
358 ((eq? head 'translate-stencil)
359 (output-stencil port (caddr expr) (offset-add offset (cadr expr))))
360 ((eq? head 'combine-stencil)
361 (output-stencil port (cadr expr) offset)
362 (output-stencil port (caddr expr) offset))
364 (display (placebox (car offset) (cdr offset)
365 (expression->string expr)) port))))))
367 (define (placebox x y s)
369 (ly:number->string x) " " (ly:number->string y) " {" s "} place-box\n"))
371 (define (polygon points blotdiameter)
374 (numbers->string points)
375 (ly:number->string (/ (length points) 2))
376 (ly:number->string blotdiameter)
379 (define (repeat-slash wid slope thick)
381 (numbers->string (list wid slope thick))
382 " draw_repeat_slash"))
384 (define (round-filled-box x y width height blotdiam)
388 (list x y width height blotdiam)) " draw_round_box"))
390 (define (new-start-system origin dim)
392 "\n" (number-pair->string origin) " start-system\n"
394 "set-ps-scale-to-lily-scale\n"))
396 (define (stem breapth width depth height)
398 (numbers->string (list breapth width depth height))
401 (define (stop-system)
404 (define stop-last-system stop-system)
406 (define (symmetric-x-triangle thick w h)
408 (numbers->string (list h w thick))
409 " draw_symmetric_x_triangle"))
412 ;; (string-append "(" (escape-parentheses s) ") show "))
413 (string-append "(" (ps-encoding s) ") show "))
418 (define (zigzag-line centre? zzw zzh thick dx dy)
420 (if centre? "true" "false")
422 (ly:number->string zzw)
424 (ly:number->string zzh)
426 (ly:number->string thick)
428 (ly:number->string dx)
430 (ly:number->string dy)
431 " draw_zigzag_line "))
434 (set! page-number (+ page-number 1))
436 "%%Page: " (number->string page-number) " " (number->string page-count) "\n"
439 (define (stop-page last?)