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 (char font i)
114 (ps-font-command font) " setfont "
115 "(\\" (ly:inexact->string i 8) ") show"))
117 ;; save current color on stack and set new color
118 (define (setcolor r g b)
119 (string-append "currentrgbcolor "
120 (ly:numbers->string (list r g b))
123 ;; restore color from stack
125 (string-append "setrgbcolor\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 on off l)
140 (string-join (map ly:number-pair->string l) " ")
142 (ly:number->string thick)
144 (ly:number->string on)
146 (ly:number->string off)
147 " ] 0 draw_dashed_slur"))
149 (define (circle radius thick)
151 "~a ~a draw_circle" radius thick))
154 (define (dot x y radius)
158 (list x y radius)) " draw_dot"))
160 (define (draw-line thick x1 y1 x2 y2)
162 "1 setlinecap 1 setlinejoin "
163 (ly:number->string thick) " setlinewidth "
164 (ly:number->string x1) " "
165 (ly:number->string y1) " moveto "
166 (ly:number->string x2) " "
167 (ly:number->string y2) " lineto stroke"))
169 (define (embedded-ps string)
173 (define (ez-ball ch letter-col ball-col)
176 (ly:numbers->string (list letter-col ball-col))
181 ;; FIXME: use draw_round_box
182 (define (filledbox breapth width depth height)
183 (string-append (ly:numbers->string (list breapth width depth height))
187 (define (utf8-string pango-font-description string)
188 (ly:warn "utf8-string encountered in PS backend"))
190 (define (glyph-string
194 (format #f "gsave 1 output-scale div 1 output-scale div scale
195 /~a findfont ~a scalefont setfont\n~a grestore" postscript-font-name size
206 (format #f " /~a glyphshow " g)
207 (format #f " ~a ~a rmoveto /~a glyphshow "
212 (define (grob-cause offset grob)
213 (let* ((cause (ly:grob-property grob 'cause))
214 (music-origin (if (ly:music? cause)
215 (ly:music-property cause 'origin)))
216 (location (if (ly:input-location? music-origin)
217 (ly:input-file-line-column music-origin)
220 (file (if location (string-append (getcwd) "/" (car location))
222 (x-ext (ly:grob-extent grob grob X))
223 (y-ext (ly:grob-extent grob grob Y))
227 (< 0 (interval-length x-ext))
228 (< 0 (interval-length y-ext)))
230 (format "~a ~a ~a ~a (textedit://~a:~a:~a) mark_URI\n"
231 (+ (car offset) (car x-ext))
232 (+ (cdr offset) (car y-ext))
233 (+ (car offset) (cdr x-ext))
234 (+ (cdr offset) (cdr y-ext))
240 ;; WTF is this in every backend?
241 (define (horizontal-line x1 x2 th)
242 (draw-line th x1 0 x2 0))
244 (define (lily-def key val)
245 (let ((prefix "lilypondlayout"))
247 (substring key 0 (min (string-length prefix) (string-length key)))
249 (string-append "/" key " {" val "} bind def\n")
250 (string-append "/" key " (" val ") def\n"))))
252 (define (named-glyph font glyph)
254 (ps-font-command font) " setfont "
255 "/" glyph " glyphshow "))
260 (define (placebox x y s)
262 (ly:number->string x) " " (ly:number->string y) " { " s " } place-box\n"))
264 (define (polygon points blotdiameter)
266 (ly:numbers->string points) " "
267 (ly:number->string (/ (length points) 2)) " "
268 (ly:number->string blotdiameter)
271 (define (repeat-slash wid slope thick)
273 (ly:numbers->string (list wid slope thick))
274 " draw_repeat_slash"))
276 (define (round-filled-box x y width height blotdiam)
279 (list x y width height blotdiam)) " draw_round_box"))
281 (define (text font s)
282 ; (ly:warn "TEXT backend-command encountered in Pango backend\nargs: ~a ~a" font str)
284 (let* ((space-length (cdar (ly:text-dimension font " ")))
285 (space-move (string-append (number->string space-length)
287 (out-vec (decode-byte-string s)))
290 (ps-font-command font) " setfont "
298 (string-append "/" (symbol->string sym) " glyphshow")))
304 (define (url-link url x y)
305 (format "~a ~a ~a ~a (~a) mark_URI"
312 (define (white-dot x y radius)
316 (list x y radius)) " draw_white_dot"))
318 (define (white-text scale s)
319 (let ((mystring (string-append
320 "(" s ") " (number->string scale)
322 " draw_white_text")))
326 (define (zigzag-line centre? zzw zzh thick dx dy)
328 (if centre? "true" "false") " "
329 (ly:number->string zzw) " "
330 (ly:number->string zzh) " "
331 (ly:number->string thick) " "
333 (ly:number->string dx) " "
334 (ly:number->string dy)
335 " draw_zigzag_line"))