1 ;;;; output-ps.scm -- implement Scheme output interface 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 ;;;; * text setting, kerning.
14 ;;;; * document output-interface
16 (debug-enable 'backtrace)
18 (define-module (scm output-ps)
20 #:export (define-fonts
67 (define page-number 0)
69 ;;; helper functions, not part of output interface
70 (define (escape-parentheses s)
71 (regexp-substitute/global #f "(^|[^\\])([\\(\\)])" s 'pre 1 "\\" 2 'post))
73 (define (offset-add a b)
74 (cons (+ (car a) (car b))
77 (define (ps-encoding text)
78 (escape-parentheses text))
81 (define (ps-string-def prefix key val)
82 (string-append "/" prefix (symbol->string key) " ("
83 (escape-parentheses val)
86 (define (ps-number-def prefix key val)
87 (let ((s (if (integer? val)
88 (ly:number->string val)
89 (ly:number->string (exact->inexact val)))))
90 (string-append "/" prefix (symbol->string key) " " s " def\n")))
92 (define (tex-font? fontname)
93 (equal? (substring fontname 0 2) "cm"))
97 ;;; Lily output interface, PostScript implementation --- cleanup and docme
100 ;;; Output-interface functions
101 (define (beam width slope thick blot)
103 (ly:numbers->string (list slope width thick blot)) " draw_beam" ))
106 (define (bezier-sandwich l thick)
108 (string-join (map ly:number-pair->string l) " ")
110 (ly:number->string thick)
111 " draw_bezier_sandwich"))
113 (define (bracket arch_angle arch_width arch_height height arch_thick thick)
116 (list arch_angle arch_width arch_height height arch_thick thick))
119 (define (char font i)
121 (font-command font) " setfont "
122 "(\\" (ly:inexact->string i 8) ") show" ))
125 (string-append "% " s "\n"))
127 (define (dashed-line thick on off dx dy)
129 (ly:number->string dx) " "
130 (ly:number->string dy) " "
131 (ly:number->string thick)
133 (ly:number->string on) " "
134 (ly:number->string off)
135 " ] 0 draw_dashed_line"))
137 ;; what the heck is this interface ?
138 (define (dashed-slur thick dash l)
140 (string-join (map ly:number-pair->string l) " ")
142 (ly:number->string thick)
144 (ly:number->string dash)
147 (ly:number->string (* 10 thick))
148 " ] 0 draw_dashed_slur"))
150 (define (font-command font . override-coding-command)
151 (let* ((name (ly:font-filename font))
152 (magnify (ly:font-magnification font))
153 (coding-alist (ly:font-encoding-alist font))
154 (input-encoding (assoc-get 'input-name coding-alist))
155 (font-encoding (assoc-get 'output-name coding-alist))
156 (coding-command (if (not (null? override-coding-command))
157 (car override-coding-command)
158 (get-coding-command font-encoding))))
161 "magfont" (string-encode-integer (hashq name 1000000))
162 "m" (string-encode-integer (inexact->exact (round (* 1000 magnify))))
163 (if (equal? input-encoding font-encoding) ""
164 (string-append "e" coding-command)))))
166 (define (define-fonts paper font-list)
168 (define (define-font command fontname scaling)
170 "/" command " { /" fontname " findfont "
171 (ly:number->string scaling) " output-scale div scalefont } bind def\n"))
173 (define (reencode-font plain encoding command)
174 (let ((coding-vector (get-coding-command encoding)))
176 plain " " coding-vector " /" command " reencode-font\n"
177 "/" command "{ /" command " findfont 1 scalefont } bind def\n")))
179 (define (guess-ps-fontname basename)
180 "We do not have the FontName, try to guess is from basename."
182 ((tex-font? basename)
183 ;; FIXME: we need proper Fontmap for the bluesky CM*, EC* fonts.
184 ;; Only the fonts that we trace in mf/ are in our own FontMap.
185 (string-append basename ".pfb"))
186 (else (string-append basename ".pfa"))
189 (define (font-load-command paper font)
190 (let* ((specced-font-name (ly:font-name font))
191 (fontname (if specced-font-name
193 (guess-ps-fontname (ly:font-filename font))))
195 (coding-alist (ly:font-encoding-alist font))
196 (input-encoding (assoc-get 'input-name coding-alist))
197 (font-encoding (assoc-get 'output-name coding-alist))
198 (plain (font-command font (get-coding-command font-encoding)))
199 (command (font-command font))
200 (designsize (ly:font-design-size font))
201 (magnification (* (ly:font-magnification font)))
202 (ops (ly:paper-lookup paper 'outputscale))
203 (scaling (* ops magnification designsize)))
206 (define-font plain fontname scaling)
207 (if (or (equal? input-encoding font-encoding)
209 (equal? font-encoding "fetaBraces")
210 (equal? font-encoding "fetaNumber")
211 (equal? font-encoding "fetaMusic")
212 (equal? font-encoding "parmesanMusic"))
214 (reencode-font plain input-encoding command)))))
216 (define (font-load-encoding encoding)
217 (let ((filename (get-coding-filename encoding)))
218 (ly:kpathsea-gulp-file filename)))
220 (let* ((encoding-list (map (lambda (x)
221 (assoc-get 'input-name
222 (ly:font-encoding-alist x)))
224 ;;(encodings (uniq-list (sort-list encoding-list string<?))))
225 (encodings (uniq-list (sort-list
227 (filter (lambda (x) (string? x)) encoding-list)
231 (apply string-append (map font-load-encoding encodings))
233 (map (lambda (x) (font-load-command paper x)) font-list)))))
235 (define (define-origin file line col) "")
237 (define (dot x y radius)
241 (list x y radius)) " draw_dot"))
243 (define (draw-line thick x1 y1 x2 y2)
245 "1 setlinecap 1 setlinejoin "
246 (ly:number->string thick) " setlinewidth "
247 (ly:number->string x1) " "
248 (ly:number->string y1) " moveto "
249 (ly:number->string x2) " "
250 (ly:number->string y2) " lineto stroke"))
253 "\nend-lilypond-output\n")
255 (define (ez-ball ch letter-col ball-col)
258 (ly:numbers->string (list letter-col ball-col))
259 " /Helvetica-Bold " ;; ugh
262 (define (filledbox breapth width depth height)
263 (string-append (ly:numbers->string (list breapth width depth height))
266 (define (header creator time-stamp page-count-)
267 (set! page-count page-count-)
271 "%%Creator: " creator " " time-stamp "\n"
272 "%%Pages: " (number->string page-count) "\n"
273 "%%PageOrder: Ascend\n"
274 ;; FIXME: TODO get from paper
275 ;; "%%DocumentPaperSizes: a6\n"
276 ;;(string-append "GNU LilyPond (" (lilypond-version) "), ")
277 ;; (strftime "%c" (localtime (current-time))))
278 ;; FIXME: duplicated in every backend
281 (string-append "Engraved by LilyPond (version " (lilypond-version) ")"))))
285 (ly:gulp-file "lilyponddefs.ps")
286 (ly:gulp-file "music-drawing-routines.ps")))
288 (define (horizontal-line x1 x2 th)
289 (draw-line th x1 0 x2 0))
291 (define (lily-def key val)
292 (let ((prefix "lilypondpaper"))
294 (substring key 0 (min (string-length prefix) (string-length key)))
296 (string-append "/" key " {" val "} bind def\n")
297 (string-append "/" key " (" val ") def\n"))))
299 (define (no-origin) "")
301 ;; FIXME: duplictates output-scopes, duplicated in other backends
302 ;; FIXME: silly interface name
303 (define (output-paper-def pd)
304 (let ((prefix "lilypondpaper"))
306 (define (scope-entry->string key var)
307 (if (variable-bound? var)
308 (let ((val (variable-ref var)))
310 ((string? val) (ps-string-def prefix key val))
311 ((number? val) (ps-number-def prefix key val))
317 (module-map scope-entry->string (ly:output-def-scope pd)))))
319 ;; FIXME: duplicated in other output backends
320 ;; FIXME: silly interface name
321 (define (output-scopes paper scopes fields basename)
322 (let ((prefix "lilypond"))
324 ;; FIXME: duplicates output-paper's scope-entry->string, mostly
325 (define (scope-entry->string key var)
326 (if (variable-bound? var)
327 (let ((val (variable-ref var)))
328 (if (and (memq key fields) (string? val))
329 (header-to-file basename key val))
331 ((string? val) (ps-string-def prefix key val))
332 ((number? val) (ps-number-def prefix key val))
336 (define (output-scope scope)
337 (apply string-append (module-map scope-entry->string scope)))
339 (string-append (apply string-append (map output-scope scopes)))))
341 ;; hmm, looks like recursing call is always last statement, does guile
343 (define (output-stencil port expr offset)
345 (let ((head (car expr)))
347 ((ly:input-location? head)
348 (display (apply define-origin (ly:input-location head)) port)
349 (output-stencil port (cadr expr) offset))
350 ((eq? head 'no-origin)
351 (display (expression->string head) port)
352 (output-stencil port (cadr expr) offset))
353 ((eq? head 'translate-stencil)
354 (output-stencil port (caddr expr) (offset-add offset (cadr expr))))
355 ((eq? head 'combine-stencil)
356 (output-stencil port (cadr expr) offset)
357 (output-stencil port (caddr expr) offset))
359 (display (placebox (car offset) (cdr offset)
360 (expression->string expr)) port))))))
362 (define (placebox x y s)
364 (ly:number->string x) " " (ly:number->string y) " { " s " } place-box\n"))
366 (define (polygon points blotdiameter)
368 (ly:numbers->string points) " "
369 (ly:number->string (/ (length points) 2)) " "
370 (ly:number->string blotdiameter)
373 (define (repeat-slash wid slope thick)
375 (ly:numbers->string (list wid slope thick))
376 " draw_repeat_slash"))
378 (define (round-filled-box x y width height blotdiam)
381 (list x y width height blotdiam)) " draw_round_box"))
383 (define (new-start-system origin dim)
385 "\n" (ly:number-pair->string origin) " start-system\n"
387 "set-ps-scale-to-lily-scale\n"))
389 (define (stem breapth width depth height)
391 (ly:numbers->string (list breapth width depth height))
394 (define (stop-system)
397 (define stop-last-system stop-system)
399 (define (symmetric-x-triangle thick w h)
401 (ly:numbers->string (list h w thick))
402 " draw_symmetric_x_triangle"))
404 (define (text font s)
405 (string-append (font-command font) " setfont "
406 "(" (ps-encoding s) ") show"))
411 (define (zigzag-line centre? zzw zzh thick dx dy)
413 (if centre? "true" "false") " "
414 (ly:number->string zzw) " "
415 (ly:number->string zzh) " "
416 (ly:number->string thick) " "
418 (ly:number->string dx) " "
419 (ly:number->string dy)
420 " draw_zigzag_line"))
423 (set! page-number (+ page-number 1))
425 "%%Page: " (number->string page-number) " " (number->string page-count) "\n"
428 (define (stop-page last?)