1 ;;;; This file is part of LilyPond, the GNU music typesetter.
3 ;;;; Copyright (C) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
4 ;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
6 ;;;; LilyPond is free software: you can redistribute it and/or modify
7 ;;;; it under the terms of the GNU General Public License as published by
8 ;;;; the Free Software Foundation, either version 3 of the License, or
9 ;;;; (at your option) any later version.
11 ;;;; LilyPond is distributed in the hope that it will be useful,
12 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ;;;; GNU General Public License for more details.
16 ;;;; You should have received a copy of the GNU General Public License
17 ;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
19 ;;;; Note: currently misused as testbed for titles with markup, see
20 ;;;; input/test/title-markup.ly
23 ;;;; * %% Papersize in (header ...)
24 ;;;; * text setting, kerning.
25 ;;;; * document output-interface
27 (define-module (scm output-ps)
37 ;;; helper functions, not part of output interface
41 ;; ice-9 format uses a lot of memory
42 ;; using simple-format almost halves lilypond cell usage
45 (if (or (nan? num) (inf? num))
47 (ly:warning (_ "Found infinity or nan in output. Substituting 0.0"))
48 (if (ly:get-option 'strict-infinity-checking)
51 (ly:number->string num)))
53 (define (number-pair->string4 numpair)
54 (ly:format "~4l" numpair))
57 ;;; Lily output interface, PostScript implementation --- cleanup and docme
61 (define (bezier-sandwich lst thick)
62 (ly:format "~l ~4f draw_bezier_sandwich"
63 (map number-pair->string4 lst)
67 (ly:format "~a (\\~a) show"
68 (ps-font-command font)
69 (ly:inexact->string i 8)))
71 (define (circle radius thick fill)
73 "~a ~4f ~4f draw_circle"
79 (define (dashed-line thick on off dx dy phase)
80 (ly:format "~4f ~4f ~4f [ ~4f ~4f ] ~4f draw_dashed_line"
88 ;; what the heck is this interface ?
89 (define (dashed-slur thick on off l)
90 (ly:format "~l ~4f [ ~4f ~4f ] 0 draw_dashed_slur"
91 (let ((control-points (append (cddr l) (list (car l) (cadr l)))))
92 (map number-pair->string4 control-points))
97 (define (dot x y radius)
98 (ly:format " ~4l draw_dot" (list radius x y)))
100 (define (draw-line thick x1 y1 x2 y2)
101 (ly:format "~4f ~4f ~4f ~4f ~4f draw_line"
105 (define (ellipse x-radius y-radius thick fill)
107 "~a ~4f ~4f ~4f draw_ellipse"
111 x-radius y-radius thick))
113 (define (embedded-ps string)
116 (define (glyph-string postscript-font-name
121 (define (glyph-spec w x y g)
122 (let ((prefix (if (string? g) "/" "")))
123 (ly:format "~4f ~4f ~4f ~a~a"
129 "/~a /CIDFont findresource ~a output-scale div scalefont setfont
133 "/~a ~a output-scale div selectfont
138 (string-join (map (lambda (x) (apply glyph-spec x))
139 (reverse w-x-y-named-glyphs)) "\n")
140 (length w-x-y-named-glyphs)))
143 (define (grob-cause offset grob)
144 (if (ly:get-option 'point-and-click)
145 (let* ((cause (ly:grob-property grob 'cause))
146 (music-origin (if (ly:stream-event? cause)
147 (ly:event-property cause 'origin))))
148 (if (ly:input-location? music-origin)
149 (let* ((location (ly:input-file-line-char-column music-origin))
150 (raw-file (car location))
151 (file (if (is-absolute? raw-file)
153 (string-append (ly-getcwd) "/" raw-file)))
154 (x-ext (ly:grob-extent grob grob X))
155 (y-ext (ly:grob-extent grob grob Y)))
157 (if (and (< 0 (interval-length x-ext))
158 (< 0 (interval-length y-ext)))
159 (ly:format "~4f ~4f ~4f ~4f (textedit://~a:~a:~a:~a) mark_URI\n"
160 (+ (car offset) (car x-ext))
161 (+ (cdr offset) (car y-ext))
162 (+ (car offset) (cdr x-ext))
163 (+ (cdr offset) (cdr y-ext))
168 ;; backslash is interpreted by GS.
169 (ly:string-substitute "\\" "/"
170 (ly:string-substitute " " "%20" file))
178 (define (named-glyph font glyph)
179 (ly:format "~a /~a glyphshow " ;;Why is there a space at the end?
180 (ps-font-command font)
186 (define (oval x-radius y-radius thick fill)
188 "~a ~4f ~4f ~4f draw_oval"
192 x-radius y-radius thick))
194 (define (placebox x y s)
195 (if (not (string-null? s))
196 (ly:format "~4f ~4f moveto ~a\n" x y s)
199 (define (polygon points blot-diameter filled?)
200 (ly:format "~a ~4l ~a ~4f draw_polygon"
201 (if filled? "true" "false")
203 (- (/ (length points) 2) 1)
206 (define (repeat-slash width slope beam-thickness)
207 (define (euclidean-length x y)
208 (sqrt (+ (* x x) (* y y))))
210 (let ((x-width (euclidean-length beam-thickness (/ beam-thickness slope)))
211 (height (* width slope)))
212 (ly:format "~4l draw_repeat_slash"
213 (list x-width width height))))
216 (define (round-filled-box left right bottom top blotdiam)
217 (let* ((halfblot (/ blotdiam 2))
218 (x (- halfblot left))
219 (width (- right (+ halfblot x)))
220 (y (- halfblot bottom))
221 (height (- top (+ halfblot y))))
222 (ly:format "~4l draw_round_box"
223 (list width height x y blotdiam))))
225 ;; save current color on stack and set new color
226 (define (setcolor r g b)
227 (ly:format "gsave ~4l setrgbcolor\n"
230 ;; restore color from stack
231 (define (resetcolor) "grestore\n")
233 ;; rotation around given point
234 (define (setrotation ang x y)
235 (ly:format "gsave ~4l translate ~a rotate ~4l translate\n"
238 (list (* -1 x) (* -1 y))))
240 (define (resetrotation ang x y)
244 (define (text font s)
245 ;; (ly:warning (_ "TEXT backend-command encountered in Pango backend"))
246 ;; (ly:warning (_ "Arguments: ~a ~a"" font str))
248 (let* ((space-length (cdar (ly:text-dimension font " ")))
249 (space-move (string-append (number->string space-length)
250 ;; how much precision do we need here?
252 (out-vec (decode-byte-string s)))
255 (ps-font-command font) " "
263 (string-append "/" (symbol->string sym) " glyphshow")))
269 (define (url-link url x y)
270 (ly:format "~a ~a currentpoint vector_add ~a ~a currentpoint vector_add (~a) mark_URI"
277 (define (path thickness exps)
278 (define (convert-path-exps exps)
285 ((memq head '(rmoveto rlineto lineto moveto)) 2)
286 ((memq head '(rcurveto curveto)) 6)
287 ((eq? head 'closepath) 0)
289 (args (take rest arity))
292 ;; WARNING: this is a vulnerability: a user can output arbitrary PS code here.
297 (convert-path-exps (drop rest arity))))
302 "gsave currentpoint translate 1 setlinecap ~a setlinewidth\n~l stroke grestore"
304 (convert-path-exps exps)))