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)
21 ;; JUNK this -- see lily.scm: ly:all-output-backend-commands
58 ;; (append (ly:all-stencil-expressions) (ly:all-output-backend-commands)))
61 ;;(write (ly:all-output-backend-commands))
62 ;;(write (ly:all-stencil-expressions))
65 ;;; helper functions, not part of output interface
66 (define (escape-parentheses s)
67 (regexp-substitute/global #f "(^|[^\\])([\\(\\)])" s 'pre 1 "\\" 2 'post))
69 (define (offset-add a b)
70 (cons (+ (car a) (car b))
73 (define (ps-encoding text)
74 (escape-parentheses text))
77 (define-public (ps-string-def prefix key val)
78 (string-append "/" prefix (symbol->string key) " ("
79 (escape-parentheses val)
83 (define (ps-number-def prefix key val)
84 (let ((s (if (integer? val)
85 (ly:number->string val)
86 (ly:number->string (exact->inexact val)))))
87 (string-append "/" prefix (symbol->string key) " " s " def\n")))
91 ;;; Lily output interface, PostScript implementation --- cleanup and docme
94 ;;; Output-interface functions
95 (define (beam width slope thick blot)
97 (ly:numbers->string (list slope width thick blot)) " draw_beam" ))
100 (define (bezier-sandwich lst thick)
102 (string-join (map ly:number-pair->string lst) " ")
104 (ly:number->string thick)
105 " draw_bezier_sandwich"))
107 (define (bracket arch_angle arch_width arch_height height arch_thick thick)
110 (list arch_angle arch_width arch_height height arch_thick thick))
113 (define (char font i)
115 (ps-font-command font) " setfont "
116 "(\\" (ly:inexact->string i 8) ") show" ))
118 (define (named-glyph font glyph)
120 (ps-font-command font) " setfont "
121 "/" glyph " glyphshow "))
123 (define (dashed-line thick on off dx dy)
125 (ly:number->string dx) " "
126 (ly:number->string dy) " "
127 (ly:number->string thick)
129 (ly:number->string on) " "
130 (ly:number->string off)
131 " ] 0 draw_dashed_line"))
133 ;; what the heck is this interface ?
134 (define (dashed-slur thick dash l)
136 (string-join (map ly:number-pair->string l) " ")
138 (ly:number->string thick)
140 (ly:number->string dash)
143 (ly:number->string (* 10 thick))
144 " ] 0 draw_dashed_slur"))
146 ; todo: merge with tex-font-command?
148 (define (embedded-ps string)
151 (define (dot x y radius)
155 (list x y radius)) " draw_dot"))
157 (define (white-dot x y radius)
161 (list x y radius)) " draw_white_dot"))
163 (define (draw-line thick x1 y1 x2 y2)
165 "1 setlinecap 1 setlinejoin "
166 (ly:number->string thick) " setlinewidth "
167 (ly:number->string x1) " "
168 (ly:number->string y1) " moveto "
169 (ly:number->string x2) " "
170 (ly:number->string y2) " lineto stroke"))
172 (define (ez-ball ch letter-col ball-col)
175 (ly:numbers->string (list letter-col ball-col))
176 " /Helvetica-Bold " ;; ugh
179 (define (filledbox breapth width depth height) ; FIXME : use draw_round_box
180 (string-append (ly:numbers->string (list breapth width depth height))
183 ;; WTF is this in every backend?
184 (define (horizontal-line x1 x2 th)
185 (draw-line th x1 0 x2 0))
187 (define (lily-def key val)
188 (let ((prefix "lilypondlayout"))
190 (substring key 0 (min (string-length prefix) (string-length key)))
192 (string-append "/" key " {" val "} bind def\n")
193 (string-append "/" key " (" val ") def\n"))))
196 (define (placebox x y s)
198 (ly:number->string x) " " (ly:number->string y) " { " s " } place-box\n"))
200 (define (polygon points blotdiameter)
202 (ly:numbers->string points) " "
203 (ly:number->string (/ (length points) 2)) " "
204 (ly:number->string blotdiameter)
207 (define (repeat-slash wid slope thick)
209 (ly:numbers->string (list wid slope thick))
210 " draw_repeat_slash"))
212 (define (round-filled-box x y width height blotdiam)
215 (list x y width height blotdiam)) " draw_round_box"))
217 (define (old-text font s)
218 ;; ugh, we should find a better way to
219 ;; extract the hsbw for /space from the font.
220 (let* ((space-length (cdar (ly:text-dimension font " ")))
222 (add-command (lambda (x) (set! commands (cons x commands)))) )
226 "Translate space as into moveto, group the rest in words."
227 (if (and (< 0 (string-length word))
228 (equal? #\space chr))
230 (string-append "(" (ps-encoding word) ") show\n")))
232 (if (equal? #\space chr)
233 (add-command (string-append (number->string space-length) " 0.0 rmoveto ")) )
235 (if (equal? #\space chr)
237 (string-append word (make-string 1 chr))))
239 (string-append s " "))
242 (ps-font-command font) " setfont "
243 (string-join (reverse commands)))))
245 (define (new-text font s)
246 (let* ((space-length (cdar (ly:text-dimension font " ")))
247 (space-move (string-append (number->string space-length) " 0.0 rmoveto "))
249 (input-enc (assoc-get 'input-name
250 (ly:font-encoding-alist font)
252 (out-vec (decode-byte-string input-enc s)))
256 (ps-font-command font) " setfont "
264 (string-append "/" (symbol->string sym) " glyphshow")))
267 ;(define text old-text)
268 (define text new-text)
270 (define (white-text scale s)
271 (let ((mystring (string-append "(" s ") " (number->string scale) " /Helvetica-Bold "
272 " draw_white_text")))
278 (define (zigzag-line centre? zzw zzh thick dx dy)
280 (if centre? "true" "false") " "
281 (ly:number->string zzw) " "
282 (ly:number->string zzh) " "
283 (ly:number->string thick) " "
285 (ly:number->string dx) " "
286 (ly:number->string dy)
287 " draw_zigzag_line"))
290 (define (grob-cause grob)
296 (define-public (glyph-string psname items)
300 (format " /~a findfont setfont " psname)
302 (format " ~a ~a rmoveto /~a glyphshow "