1 ;;;; output-ps.scm -- implement Scheme output interface for PostScript
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2005 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
61 ;; (append (ly:all-stencil-expressions) (ly:all-output-backend-commands)))
64 ;;(write (ly:all-output-backend-commands))
65 ;;(write (ly:all-stencil-expressions))
68 ;;; helper functions, not part of output interface
69 (define (escape-parentheses s)
70 (regexp-substitute/global #f "(^|[^\\])([\\(\\)])" s 'pre 1 "\\" 2 'post))
72 (define (ps-encoding text)
73 (escape-parentheses text))
76 (define-public (ps-string-def prefix key val)
77 (string-append "/" prefix (symbol->string key) " ("
78 (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 lst thick)
101 (string-join (map ly:number-pair->string lst) " ")
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 (circle radius thick)
114 "~a ~a draw_circle" radius thick))
116 (define (char font i)
118 (ps-font-command font) " setfont "
119 "(\\" (ly:inexact->string i 8) ") show"))
121 (define (dashed-line thick on off dx dy)
123 (ly:number->string dx) " "
124 (ly:number->string dy) " "
125 (ly:number->string thick)
127 (ly:number->string on) " "
128 (ly:number->string off)
129 " ] 0 draw_dashed_line"))
131 ;; what the heck is this interface ?
132 (define (dashed-slur thick on off l)
134 (string-join (map ly:number-pair->string l) " ")
136 (ly:number->string thick)
138 (ly:number->string on)
140 (ly:number->string off)
141 " ] 0 draw_dashed_slur"))
143 (define (dot x y radius)
147 (list x y radius)) " draw_dot"))
149 (define (draw-line thick x1 y1 x2 y2)
151 "1 setlinecap 1 setlinejoin "
152 (ly:number->string thick) " setlinewidth "
153 (ly:number->string x1) " "
154 (ly:number->string y1) " moveto "
155 (ly:number->string x2) " "
156 (ly:number->string y2) " lineto stroke"))
158 (define (embedded-ps string)
162 (define (ez-ball ch letter-col ball-col)
165 (ly:numbers->string (list letter-col ball-col))
170 ;; FIXME: use draw_round_box
171 (define (filledbox breapth width depth height)
172 (string-append (ly:numbers->string (list breapth width depth height))
175 (define (glyph-string
179 (format #f "gsave 1 output-scale div 1 output-scale div scale
180 /~a findfont ~a scalefont setfont\n~a grestore" postscript-font-name size
191 (format #f " /~a glyphshow " g)
192 (format #f " ~a ~a rmoveto /~a glyphshow "
197 (define (grob-cause offset grob)
198 (let* ((cause (ly:grob-property grob 'cause))
199 (music-origin (if (ly:music? cause)
200 (ly:music-property cause 'origin)))
201 (location (if (ly:input-location? music-origin)
202 (ly:input-file-line-column music-origin)
205 (file (if location (string-append (getcwd) "/" (car location))
207 (x-ext (ly:grob-extent grob grob X))
208 (y-ext (ly:grob-extent grob grob Y))
212 (< 0 (interval-length x-ext))
213 (< 0 (interval-length y-ext)))
215 (format "~a ~a ~a ~a (textedit://~a:~a:~a) mark_URI\n"
216 (+ (car offset) (car x-ext))
217 (+ (cdr offset) (car y-ext))
218 (+ (car offset) (cdr x-ext))
219 (+ (cdr offset) (cdr y-ext))
225 ;; WTF is this in every backend?
226 (define (horizontal-line x1 x2 th)
227 (draw-line th x1 0 x2 0))
229 (define (lily-def key val)
230 (let ((prefix "lilypondlayout"))
232 (substring key 0 (min (string-length prefix) (string-length key)))
234 (string-append "/" key " {" val "} bind def\n")
235 (string-append "/" key " (" val ") def\n"))))
237 (define (named-glyph font glyph)
239 (ps-font-command font) " setfont "
240 "/" glyph " glyphshow "))
245 (define (placebox x y s)
247 (ly:number->string x) " " (ly:number->string y) " { " s " } place-box\n"))
249 (define (polygon points blotdiameter)
251 (ly:numbers->string points) " "
252 (ly:number->string (/ (length points) 2)) " "
253 (ly:number->string blotdiameter)
256 (define (repeat-slash wid slope thick)
258 (ly:numbers->string (list wid slope thick))
259 " draw_repeat_slash"))
261 ;; restore color from stack
263 (string-append "setrgbcolor\n"))
265 (define (round-filled-box x y width height blotdiam)
268 (list x y width height blotdiam)) " draw_round_box"))
270 ;; save current color on stack and set new color
271 (define (setcolor r g b)
272 (string-append "currentrgbcolor "
273 (ly:numbers->string (list r g b))
276 (define (text font s)
277 ; (ly:warn "TEXT backend-command encountered in Pango backend\nargs: ~a ~a" font str)
279 (let* ((space-length (cdar (ly:text-dimension font " ")))
280 (space-move (string-append (number->string space-length)
282 (out-vec (decode-byte-string s)))
285 (ps-font-command font) " setfont "
293 (string-append "/" (symbol->string sym) " glyphshow")))
299 (define (url-link url x y)
300 (format "~a ~a ~a ~a (~a) mark_URI"
307 (define (utf8-string pango-font-description string)
308 (ly:warn "utf8-string encountered in PS backend"))
310 (define (white-dot x y radius)
314 (list x y radius)) " draw_white_dot"))
316 (define (white-text scale s)
317 (let ((mystring (string-append
318 "(" s ") " (number->string scale)
320 " draw_white_text")))
324 (define (zigzag-line centre? zzw zzh thick dx dy)
326 (if centre? "true" "false") " "
327 (ly:number->string zzw) " "
328 (ly:number->string zzh) " "
329 (ly:number->string thick) " "
331 (ly:number->string dx) " "
332 (ly:number->string dy)
333 " draw_zigzag_line"))