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 (dashed-line thick on off dx dy)
120 (ly:number->string dx) " "
121 (ly:number->string dy) " "
122 (ly:number->string thick)
124 (ly:number->string on) " "
125 (ly:number->string off)
126 " ] 0 draw_dashed_line"))
128 ;; what the heck is this interface ?
129 (define (dashed-slur thick dash l)
131 (string-join (map ly: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 ; todo: merge with tex-font-command?
143 (define (embedded-ps string)
146 (define (dot x y radius)
150 (list x y radius)) " draw_dot"))
152 (define (white-dot x y radius)
156 (list x y radius)) " draw_white_dot"))
158 (define (draw-line thick x1 y1 x2 y2)
160 "1 setlinecap 1 setlinejoin "
161 (ly:number->string thick) " setlinewidth "
162 (ly:number->string x1) " "
163 (ly:number->string y1) " moveto "
164 (ly:number->string x2) " "
165 (ly:number->string y2) " lineto stroke"))
167 (define (ez-ball ch letter-col ball-col)
170 (ly:numbers->string (list letter-col ball-col))
171 " /Helvetica-Bold " ;; ugh
174 (define (filledbox breapth width depth height) ; FIXME : use draw_round_box
175 (string-append (ly:numbers->string (list breapth width depth height))
178 ;; WTF is this in every backend?
179 (define (horizontal-line x1 x2 th)
180 (draw-line th x1 0 x2 0))
182 (define (lily-def key val)
183 (let ((prefix "lilypondlayout"))
185 (substring key 0 (min (string-length prefix) (string-length key)))
187 (string-append "/" key " {" val "} bind def\n")
188 (string-append "/" key " (" val ") def\n"))))
191 (define (placebox x y s)
193 (ly:number->string x) " " (ly:number->string y) " { " s " } place-box\n"))
195 (define (polygon points blotdiameter)
197 (ly:numbers->string points) " "
198 (ly:number->string (/ (length points) 2)) " "
199 (ly:number->string blotdiameter)
202 (define (repeat-slash wid slope thick)
204 (ly:numbers->string (list wid slope thick))
205 " draw_repeat_slash"))
207 (define (round-filled-box x y width height blotdiam)
210 (list x y width height blotdiam)) " draw_round_box"))
213 (define (stem breapth width depth height) ; FIXME: use draw_round_box.
215 (ly:numbers->string (list breapth width depth height))
219 (define (text font s)
222 ;; ugh, we should find a better way to
223 ;; extract the hsbw for /space from the font.
225 ((space-length (cdar (ly:text-dimension font "t")))
227 (add-command (lambda (x) (set! commands (cons x commands)))) )
231 "Translate space as into moveto, group the rest in words."
232 (if (and (< 0 (string-length word))
233 (equal? #\space chr))
235 (string-append "(" (ps-encoding word) ") show\n")))
237 (if (equal? #\space chr)
238 (add-command (string-append (number->string space-length) " 0.0 rmoveto ")) )
240 (if (equal? #\space chr)
242 (string-append word (make-string 1 chr))))
244 (string-append s " "))
247 (ps-font-command font) " setfont "
248 (string-join (reverse commands)))
252 (define (white-text scale s)
253 (let ((mystring (string-append "(" s ") " (number->string scale) " /Helvetica-bold "
254 " draw_white_text")))
260 (define (zigzag-line centre? zzw zzh thick dx dy)
262 (if centre? "true" "false") " "
263 (ly:number->string zzw) " "
264 (ly:number->string zzh) " "
265 (ly:number->string thick) " "
267 (ly:number->string dx) " "
268 (ly:number->string dy)
269 " draw_zigzag_line"))
272 (define (grob-cause grob)