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)
82 (define (ps-number-def prefix key val)
83 (let ((s (if (integer? val)
84 (ly:number->string val)
85 (ly:number->string (exact->inexact val)))))
86 (string-append "/" prefix (symbol->string key) " " s " def\n")))
90 ;;; Lily output interface, PostScript implementation --- cleanup and docme
93 ;;; Output-interface functions
94 (define (beam width slope thick blot)
96 (ly:numbers->string (list slope width thick blot)) " draw_beam" ))
99 (define (bezier-sandwich l thick)
101 (string-join (map ly:number-pair->string l) " ")
103 (ly:number->string thick)
104 " draw_bezier_sandwich"))
106 (define (bracket arch_angle arch_width arch_height height arch_thick thick)
109 (list arch_angle arch_width arch_height height arch_thick thick))
112 (define (char font i)
114 (ps-font-command font) " setfont "
115 "(\\" (ly:inexact->string i 8) ") show" ))
117 (define (dashed-line thick on off dx dy)
119 (ly:number->string dx) " "
120 (ly:number->string dy) " "
121 (ly:number->string thick)
123 (ly:number->string on) " "
124 (ly:number->string off)
125 " ] 0 draw_dashed_line"))
127 ;; what the heck is this interface ?
128 (define (dashed-slur thick dash l)
130 (string-join (map ly:number-pair->string l) " ")
132 (ly:number->string thick)
134 (ly:number->string dash)
137 (ly:number->string (* 10 thick))
138 " ] 0 draw_dashed_slur"))
140 ; todo: merge with tex-font-command?
144 (define (dot x y radius)
148 (list x y radius)) " draw_dot"))
150 (define (white-dot x y radius)
154 (list x y radius)) " draw_white_dot"))
156 (define (draw-line thick x1 y1 x2 y2)
158 "1 setlinecap 1 setlinejoin "
159 (ly:number->string thick) " setlinewidth "
160 (ly:number->string x1) " "
161 (ly:number->string y1) " moveto "
162 (ly:number->string x2) " "
163 (ly:number->string y2) " lineto stroke"))
165 (define (ez-ball ch letter-col ball-col)
168 (ly:numbers->string (list letter-col ball-col))
169 " /Helvetica-Bold " ;; ugh
172 (define (filledbox breapth width depth height) ; FIXME : use draw_round_box
173 (string-append (ly:numbers->string (list breapth width depth height))
176 ;; WTF is this in every backend?
177 (define (horizontal-line x1 x2 th)
178 (draw-line th x1 0 x2 0))
180 (define (lily-def key val)
181 (let ((prefix "lilypondpaper"))
183 (substring key 0 (min (string-length prefix) (string-length key)))
185 (string-append "/" key " {" val "} bind def\n")
186 (string-append "/" key " (" val ") def\n"))))
189 (define (placebox x y s)
191 (ly:number->string x) " " (ly:number->string y) " { " s " } place-box\n"))
193 (define (polygon points blotdiameter)
195 (ly:numbers->string points) " "
196 (ly:number->string (/ (length points) 2)) " "
197 (ly:number->string blotdiameter)
200 (define (repeat-slash wid slope thick)
202 (ly:numbers->string (list wid slope thick))
203 " draw_repeat_slash"))
205 (define (round-filled-box x y width height blotdiam)
208 (list x y width height blotdiam)) " draw_round_box"))
211 (define (stem breapth width depth height) ; FIXME: use draw_round_box.
213 (ly:numbers->string (list breapth width depth height))
216 (define (symmetric-x-triangle thick w h)
218 (ly:numbers->string (list h w thick))
219 " draw_symmetric_x_triangle"))
221 (define (text font s)
225 ;; ugh, we should find a better way to
226 ;; extract the hsbw for /space from the font.
228 (space-length (cdar (ly:text-dimension font "t")))
230 (add-command (lambda (x) (set! commands (cons x commands)))) )
234 "Translate space as into moveto, group the rest in words."
235 (if (and (< 0 (string-length word))
236 (equal? #\space chr))
238 (string-append "(" (ps-encoding word) ") show\n")))
240 (if (equal? #\space chr)
241 (add-command (string-append (number->string space-length) " 0.0 rmoveto ")) )
243 (if (equal? #\space chr)
245 (string-append word (make-string 1 chr))))
247 (string-append s " "))
250 (ps-font-command font) " setfont "
251 (string-join (reverse commands)))
257 (define (zigzag-line centre? zzw zzh thick dx dy)
259 (if centre? "true" "false") " "
260 (ly:number->string zzw) " "
261 (ly:number->string zzh) " "
262 (ly:number->string thick) " "
264 (ly:number->string dx) " "
265 (ly:number->string dy)
266 " draw_zigzag_line"))
269 (define (grob-cause grob)