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 ;;;; * papersize in header
13 ;;;; * special characters, encoding.
14 ;;;; + implement encoding switch (switches? input/output??),
15 ;;;; + move encoding definitions to ENCODING.ps files, or
16 ;;;; + find out which program's PS(?) encoding code we can use?
17 ;;;; * text setting, kerning.
18 ;;;; * document output-interface
20 (debug-enable 'backtrace)
22 (define-module (scm output-ps)
24 #:export (define-fonts
70 ;; alist containing fontname -> fontcommand assoc (both strings)
72 (define page-number 0)
73 (define font-name-alist '())
75 ;; /lilypondpaperoutputscale 1.75729901757299 def
76 ;;/lily-output-units 2.83464 def %% milimeter
77 ;;/output-scale lilypondpaperoutputscale lily-output-units mul def
79 ;; output-scale = 1.75729901757299 * 2.83464 = 4.9813100871731003736
81 (define OUTPUT-SCALE 4.98)
84 ;;; helper functions, not part of output interface
85 (define (escape-parentheses s)
86 (regexp-substitute/global #f "(^|[^\\])([\\(\\)])" s 'pre 1 "\\" 2 'post))
88 (define (offset-add a b)
89 (cons (+ (car a) (car b))
93 (define font-encoding-alist
94 '(("ecrm12" . "ISOLatin1Encoding")
95 ("ecmb12" . "ISOLatin1Encoding")))
97 (define (ps-encoding text)
98 (escape-parentheses text))
101 (define (ps-string-def prefix key val)
102 (string-append "/" prefix (symbol->string key) " ("
103 (escape-parentheses val)
106 (define (ps-number-def prefix key val)
107 (let ((s (if (integer? val)
109 (number->string (exact->inexact val)))))
110 (string-append "/" prefix (symbol->string key) " " s " def\n")))
112 (define (tex-font? fontname)
113 (equal? (substring fontname 0 2) "cm"))
117 ;;; Lily output interface, PostScript implementation --- cleanup and docme
120 ;;; Output-interface functions
121 (define (beam width slope thick blot)
123 (numbers->string (list slope width thick blot)) " draw_beam" ))
126 (define (bezier-sandwich l thick)
128 (apply string-append (map number-pair->string l))
129 (ly:number->string thick)
130 " draw_bezier_sandwich "))
132 (define (bracket arch_angle arch_width arch_height height arch_thick thick)
135 (list arch_angle arch_width arch_height height arch_thick thick))
140 "(\\" (inexact->string i 8) ") show " ))
143 (string-append "% " s "\n"))
145 (define (dashed-line thick on off dx dy)
147 (ly:number->string dx)
149 (ly:number->string dy)
151 (ly:number->string thick)
153 (ly:number->string on)
155 (ly:number->string off)
156 " ] 0 draw_dashed_line"))
158 ;; what the heck is this interface ?
159 (define (dashed-slur thick dash l)
161 (apply string-append (map number-pair->string l))
162 (ly:number->string thick)
164 (ly:number->string dash)
167 (ly:number->string (* 10 thick))
168 " ] 0 draw_dashed_slur"))
170 (define (define-fonts internal-external-name-mag-pairs)
172 (define (fontname->designsize fontname)
173 (let ((i (string-index fontname char-numeric?)))
174 (string->number (substring fontname i))))
176 (define (define-font command fontname scaling)
178 "/" command " { /" fontname " findfont "
179 (ly:number->string scaling) " output-scale div scalefont } bind def\n"))
181 (define (reencode-font raw encoding command)
183 raw " " encoding " /" command " reencode-font\n"
184 "/" command "{ /" command " findfont 1 scalefont } bind def\n"))
186 ;; frobnicate NAME to jibe with external definitions.
187 (define (possibly-mangle-fontname fontname)
189 ((tex-font? fontname)
190 ;; FIXME: we need proper Fontmap for CM fonts, like so:
191 ;; /CMR10 (cmr10.pfb);
192 ;; (string-upcase fontname)
193 (string-append fontname ".pfb"))
194 ((or (equal? (substring fontname 0 4) "feta")
195 (equal? (substring fontname 0 4) "parm"))
196 (regexp-substitute/global
197 #f "(feta|parmesan)([a-z-]*)([0-9]+)"
198 fontname 'pre "GNU-LilyPond-" 1 2 "-" 3 'post))
201 ;; (define (font-load-command name-mag command)
202 (define (font-load-command lst)
203 (let* ((key-name-size (car lst))
205 (value-name-size (car value))
206 (command (cdr value))
207 (fontname (car value-name-size))
208 (mangled (possibly-mangle-fontname fontname))
209 (encoding (assoc-get fontname font-encoding-alist))
210 (designsize (fontname->designsize fontname))
211 (fontsize (cdr value-name-size))
212 (scaling (* fontsize designsize)))
218 (format (current-error-port) "key-name-size ~S\n" key-name-size)
219 (format (current-error-port) "value ~S\n" value)
220 (format (current-error-port) "value-name-size ~S\n" value-name-size)
221 (format (current-error-port) "command ~S\n" command)
222 (format (current-error-port) "designsize ~S\n" designsize)
223 (format (current-error-port) "fontname ~S\n" fontname)
224 (format (current-error-port) "mangled ~S\n" mangled)
225 (format (current-error-port) "fontsize ~S\n" fontsize)
226 (format (current-error-port) "scaling ~S\n" scaling)))
229 ;; FIXME: should rather tag encoded font
230 (let ((raw (string-append command "-raw")))
232 (define-font raw mangled scaling)
233 (reencode-font raw encoding command)))
234 (define-font command mangled scaling))))
236 (define (ps-encoded-fontswitch name-mag-pair)
237 (let* ((key (car name-mag-pair))
238 (value (cdr name-mag-pair))
239 (fontname (car value))
240 (scaling (cdr value)))
241 (cons key (cons value
243 "lilyfont" fontname "-" (number->string scaling))))))
245 (set! font-name-alist
246 (map ps-encoded-fontswitch internal-external-name-mag-pairs))
247 (apply string-append (map font-load-command font-name-alist)))
249 (define (define-origin file line col) "")
251 (define (dot x y radius)
255 (list x y radius)) " draw_dot"))
257 (define (draw-line thick x1 y1 x2 y2)
261 (ly:number->string thick)
263 (ly:number->string x1)
265 (ly:number->string y1)
267 (ly:number->string x2)
269 (ly:number->string y2)
273 "\nend-lilypond-output\n")
275 (define (ez-ball ch letter-col ball-col)
278 (numbers->string (list letter-col ball-col))
279 " /Helvetica-Bold " ;; ugh
282 (define (filledbox breapth width depth height)
283 (string-append (numbers->string (list breapth width depth height))
286 (define (fontify name-mag-pair exp)
288 (define (select-font name-mag-pair)
289 (let ((c (assoc name-mag-pair font-name-alist)))
292 (string-append " " (cddr c) " setfont ")
295 (format "Programming error: No such font: ~S" name-mag-pair))
298 (string-append (select-font name-mag-pair) exp))
300 (define (header creator time-stamp page-count-)
301 (set! page-count page-count-)
305 "%%Creator: " creator " " time-stamp "\n"
306 "%%Pages: " (number->string page-count) "\n"
307 "%%PageOrder: Ascend\n"
308 ;; FIXME: TODO get from paper
309 ;; "%%DocumentPaperSizes: a6\n"
310 ;;(string-append "GNU LilyPond (" (lilypond-version) "), ")
311 ;; (strftime "%c" (localtime (current-time))))
312 ;; FIXME: duplicated in every backend
315 (string-append "Engraved by LilyPond (version " (lilypond-version) ")"))))
319 (ly:gulp-file "lilyponddefs.ps")
320 (ly:gulp-file "music-drawing-routines.ps")))
322 (define (horizontal-line x1 x2 th)
323 (draw-line th x1 0 x2 0))
325 (define (lily-def key val)
326 (let ((prefix "lilypondpaper"))
328 (substring key 0 (min (string-length prefix) (string-length key)))
330 (string-append "/" key " {" val "} bind def\n")
331 (string-append "/" key " (" val ") def\n"))))
333 (define (no-origin) "")
335 ;; FIXME: duplictates output-scopes, duplicated in other backends
336 ;; FIXME: silly interface name
337 (define (output-paper-def pd)
338 (let ((prefix "lilypondpaper"))
340 (define (scope-entry->string key var)
341 (let ((val (variable-ref var)))
343 ((string? val) (ps-string-def prefix key val))
344 ((number? val) (ps-number-def prefix key val))
349 (module-map scope-entry->string (ly:output-def-scope pd)))))
351 ;; FIXME: duplicated in other output backends
352 ;; FIXME: silly interface name
353 (define (output-scopes paper scopes fields basename)
354 (let ((prefix "lilypond"))
356 ;; FIXME: duplicates output-paper's scope-entry->string, mostly
357 (define (scope-entry->string key var)
358 (if (variable-bound? var)
359 (let ((val (variable-ref var)))
360 (if (and (memq key fields) (string? val))
361 (header-to-file basename key val))
363 ((string? val) (ps-string-def prefix key val))
364 ((number? val) (ps-number-def prefix key val))
368 (define (output-scope scope)
369 (apply string-append (module-map scope-entry->string scope)))
371 (string-append (apply string-append (map output-scope scopes)))))
373 ;; hmm, looks like recursing call is always last statement, does guile
375 (define (output-stencil port expr offset)
377 (let ((head (car expr)))
379 ((ly:input-location? head)
380 (display (apply define-origin (ly:input-location head)) port)
381 (output-stencil port (cadr expr) offset))
382 ((eq? head 'no-origin)
383 (display (expression->string head) port)
384 (output-stencil port (cadr expr) offset))
385 ((eq? head 'translate-stencil)
386 (output-stencil port (caddr expr) (offset-add offset (cadr expr))))
387 ((eq? head 'combine-stencil)
388 (output-stencil port (cadr expr) offset)
389 (output-stencil port (caddr expr) offset))
391 (display (placebox (car offset) (cdr offset)
392 (expression->string expr)) port))))))
394 (define (placebox x y s)
396 (ly:number->string x) " " (ly:number->string y) " {" s "} place-box\n"))
398 (define (polygon points blotdiameter)
401 (numbers->string points)
402 (ly:number->string (/ (length points) 2))
403 (ly:number->string blotdiameter)
406 (define (repeat-slash wid slope thick)
408 (numbers->string (list wid slope thick))
409 " draw_repeat_slash"))
411 (define (round-filled-box x y width height blotdiam)
415 (list x y width height blotdiam)) " draw_round_box"))
417 (define (new-start-system origin dim)
419 "\n" (number-pair->string origin) " start-system\n"
421 "set-ps-scale-to-lily-scale\n"))
423 (define (stem breapth width depth height)
425 (numbers->string (list breapth width depth height))
428 (define (stop-system)
431 (define stop-last-system stop-system)
433 (define (symmetric-x-triangle thick w h)
435 (numbers->string (list h w thick))
436 " draw_symmetric_x_triangle"))
439 ;; (string-append "(" (escape-parentheses s) ") show "))
440 (string-append "(" (ps-encoding s) ") show "))
445 (define (zigzag-line centre? zzw zzh thick dx dy)
447 (if centre? "true" "false")
449 (ly:number->string zzw)
451 (ly:number->string zzh)
453 (ly:number->string thick)
455 (ly:number->string dx)
457 (ly:number->string dy)
458 " draw_zigzag_line "))
461 (set! page-number (+ page-number 1))
463 "%%Page: " (number->string page-number) " " (number->string page-count) "\n"
466 (define (stop-page last?)