3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 2003--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 (define-public (stack-stencils axis dir padding stils)
8 "Stack stencils STILS in direction AXIS, DIR, using PADDING."
10 ((null? stils) empty-stencil)
11 ((null? (cdr stils)) (car stils))
12 (else (ly:stencil-combine-at-edge
13 (car stils) axis dir (stack-stencils axis dir padding (cdr stils))
16 (define-public (stack-stencils-padding-list axis dir padding stils)
17 "Stack stencils STILS in direction AXIS, DIR, using a list of PADDING."
19 ((null? stils) empty-stencil)
20 ((null? (cdr stils)) (car stils))
21 (else (ly:stencil-combine-at-edge
24 (stack-stencils-padding-list axis dir (cdr padding) (cdr stils))
27 (define-public (centered-stencil stencil)
28 "Center stencil @var{stencil} in both the X and Y directions"
29 (ly:stencil-aligned-to (ly:stencil-aligned-to stencil X CENTER) Y CENTER))
31 (define-public (stack-lines dir padding baseline stils)
32 "Stack vertically with a baseline-skip."
35 (if (null? (cdr stils))
37 (ly:stencil-combine-at-edge
39 (stack-lines dir padding baseline (cdr stils))
42 (define-public (bracketify-stencil stil axis thick protusion padding)
43 "Add brackets around STIL, producing a new stencil."
45 (let* ((ext (ly:stencil-extent stil axis))
46 (lb (ly:bracket axis ext thick (- protusion)))
47 (rb (ly:bracket axis ext thick protusion)))
49 (ly:stencil-combine-at-edge stil (other-axis axis) 1 lb padding))
51 (ly:stencil-combine-at-edge stil (other-axis axis) -1 rb padding))
54 (define-public (make-filled-box-stencil xext yext)
58 (list 'round-filled-box (- (car xext)) (cdr xext)
59 (- (car yext)) (cdr yext) 0.0)
62 (define-public (make-circle-stencil radius thickness fill)
63 "Make a circle of radius @var{radius} and thickness @var{thickness}"
65 (list 'circle radius thickness fill)
66 (cons (- radius) radius)
67 (cons (- radius) radius)))
69 (define-public (box-grob-stencil grob)
70 "Make a box of exactly the extents of the grob. The box precisely
71 encloses the contents.
73 (let* ((xext (ly:grob-extent grob grob 0))
74 (yext (ly:grob-extent grob grob 1))
78 (make-filled-box-stencil xext (cons (- (car yext) thick) (car yext)))
79 (make-filled-box-stencil xext (cons (cdr yext) (+ (cdr yext) thick)))
80 (make-filled-box-stencil (cons (cdr xext) (+ (cdr xext) thick)) yext)
81 (make-filled-box-stencil (cons (- (car xext) thick) (car xext)) yext))))
83 ;; TODO merge this and prev function.
84 (define-public (box-stencil stencil thickness padding)
85 "Add a box around STENCIL, producing a new stencil."
86 (let* ((x-ext (interval-widen (ly:stencil-extent stencil 0) padding))
87 (y-ext (interval-widen (ly:stencil-extent stencil 1) padding))
88 (y-rule (make-filled-box-stencil (cons 0 thickness) y-ext))
89 (x-rule (make-filled-box-stencil
90 (interval-widen x-ext thickness) (cons 0 thickness))))
91 (set! stencil (ly:stencil-combine-at-edge stencil X 1 y-rule padding))
92 (set! stencil (ly:stencil-combine-at-edge stencil X -1 y-rule padding))
93 (set! stencil (ly:stencil-combine-at-edge stencil Y 1 x-rule 0.0))
94 (set! stencil (ly:stencil-combine-at-edge stencil Y -1 x-rule 0.0))
97 (define-public (circle-stencil stencil thickness padding)
98 "Add a circle around STENCIL, producing a new stencil."
99 (let* ((x-ext (ly:stencil-extent stencil 0))
100 (y-ext (ly:stencil-extent stencil 1))
101 (diameter (max (- (cdr x-ext) (car x-ext))
102 (- (cdr y-ext) (car y-ext))))
103 (radius (+ (/ diameter 2) padding thickness))
104 (circle (make-circle-stencil radius thickness #f)))
108 (ly:stencil-translate circle
110 (interval-center x-ext)
111 (interval-center y-ext))))))
114 (define-public (fontify-text font-metric text)
115 "Set TEXT with font FONT-METRIC, returning a stencil."
116 (let* ((b (ly:text-dimension font-metric text)))
118 `(text ,font-metric ,text) (car b) (cdr b))))
120 (define-public (fontify-text-white scale font-metric text)
121 "Set TEXT with scale factor s"
122 (let* ((b (ly:text-dimension font-metric text))
123 ;;urg -- workaround for using ps font
124 (c `(white-text ,(* 2 scale) ,text)))
125 ;;urg -- extent is not from ps font, but we hope it's close
126 (ly:make-stencil c (car b) (cdr b))))
128 (define-public (dimension-arrows destination)
129 "Draw twosided arrow from here to @var{destination}"
134 (rotate (lambda (z ang)
135 (* (make-polar 1 ang)
137 (complex-to-offset (lambda (z)
138 (list (real-part z) (imag-part z))))
140 (z-dest (+ (* e_x (car destination)) (* e_y (cdr destination))))
141 (e_z (/ z-dest (magnitude z-dest)))
142 (triangle-points '(-1+0.25i
145 (p1s (map (lambda (z)
146 (+ z-dest (rotate z (angle z-dest))))
148 (p2s (map (lambda (z)
149 (rotate z (angle (- z-dest))))
154 `(polygon (quote ,(concatenate (map complex-to-offset p1s)))
159 `(polygon (quote ,(concatenate (map complex-to-offset p2s)))
164 (start (complex-to-offset (/ (* e_z shorten-line) 2)))
165 (end (complex-to-offset (- z-dest (/ (* e_z shorten-line) 2))))
167 (line (ly:make-stencil
168 `(draw-line ,thickness
169 ,(car start) ,(cadr start)
170 ,(car end) ,(cadr end)
172 (cons (min 0 (car destination))
173 (min 0 (cdr destination)))
174 (cons (max 0 (car destination))
175 (max 0 (cdr destination)))))
177 (result (ly:stencil-add arrow-2 arrow-1 line)))
182 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
185 ;; annotations are arrows indicating the numerical value of
187 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
189 (define*-public (annotate-y-interval layout name extent is-length
190 #:key (color darkblue))
191 (let ((text-props (cons '((font-size . -3)
192 (font-family . typewriter))
193 (layout-extract-page-properties layout)))
195 (define (center-stencil-on-extent stil)
196 (ly:stencil-translate (ly:stencil-aligned-to stil Y CENTER)
197 (cons 0 (interval-center extent))))
198 ;; do something sensible for 0,0 intervals.
199 (set! extent (interval-widen extent 0.001))
200 (if (not (interval-sane? extent))
201 (set! annotation (interpret-markup
203 (make-simple-markup (format "~a: NaN/inf" name))))
204 (let ((text-stencil (interpret-markup
206 (markup #:whiteout #:simple name)))
207 (dim-stencil (interpret-markup
211 ((interval-empty? extent)
214 (format "~$" (interval-length extent)))
217 (car extent) (cdr extent)))))))
218 (arrows (ly:stencil-translate-axis
219 (dimension-arrows (cons 0 (interval-length extent)))
220 (interval-start extent) Y)))
222 (center-stencil-on-extent text-stencil))
224 (ly:stencil-combine-at-edge arrows X RIGHT annotation 0.5 0))
226 (ly:stencil-combine-at-edge annotation X LEFT
227 (center-stencil-on-extent dim-stencil)
230 (ly:make-stencil (list 'color color (ly:stencil-expr annotation))
231 (ly:stencil-extent annotation X)
232 (cons 10000 -10000)))))
236 (define-public (eps-file->stencil axis size file-name)
238 ((contents (ly:gulp-file file-name))
239 (bbox (get-postscript-bbox contents))
240 (bbox-size (if (= axis X)
241 (- (list-ref bbox 2) (list-ref bbox 0))
242 (- (list-ref bbox 3) (list-ref bbox 1))
244 (factor (exact->inexact (/ size bbox-size)))
246 (map (lambda (x) (* factor x)) bbox)))
256 currentpoint translate
269 (cons (list-ref scaled-bbox 0) (list-ref scaled-bbox 2))
270 (cons (list-ref scaled-bbox 1) (list-ref scaled-bbox 3)))
272 (ly:make-stencil "" '(0 . 0) '(0 . 0)))
275 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
276 ;; output signatures.
278 (define-public (write-system-signatures basename paper-systems count)
279 (if (pair? paper-systems)
282 ((outname (format "~a-~a.signature" basename count)) )
284 (ly:message "Writing ~a" outname)
285 (write-system-signature outname (car paper-systems))
286 (write-system-signatures basename (cdr paper-systems) (1+ count))))))
289 (use-modules (scm paper-system))
290 (define-public (write-system-signature filename paper-system)
292 (and (number? x) (inexact? x)))
295 (paper-system-system-grob paper-system))
297 (define output (open-output-file filename))
299 (define (strip-floats expr)
300 "Replace floats by #f"
303 ((ly:font-metric? expr) (ly:font-name expr))
304 ((pair? expr) (cons (strip-floats (car expr))
305 (strip-floats (cdr expr))))
308 (define (fold-false-pairs expr)
309 "Try to remove lists of #f as much as possible."
313 (rest (fold-false-pairs (cdr expr))))
316 (cons (fold-false-pairs first) rest)
321 (define (pythonic-string expr)
322 "escape quotes and slashes for python consumption"
323 (regexp-substitute/global #f "([\n\\\\'\"])" (format "~a" expr) 'pre "\\" 1 'post))
325 (define (pythonic-pair expr)
327 (car expr) (cdr expr)))
330 (define (raw-string expr)
331 "escape quotes and slashes for python consumption"
332 (regexp-substitute/global #f "[@\n]" (format "~a" expr) 'pre " " 'post))
334 (define (raw-pair expr)
336 (car expr) (cdr expr)))
338 (define (found-grob expr)
343 (cause (event-cause grob))
344 (input (if (ly:stream-event? cause) (ly:event-property cause 'origin) #f))
345 (location (if (ly:input-location? input) (ly:input-file-line-char-column input) '()))
347 (x-ext (ly:grob-extent grob system-grob X))
348 (y-ext (ly:grob-extent grob system-grob Y))
351 (interpret-for-signature #f (lambda (e)
352 (set! collected (cons e collected)))
357 (cdr (assq 'name (ly:grob-property grob 'meta) ))
358 (raw-string location)
359 (raw-pair (if (interval-empty? x-ext) '(1 . -1) x-ext))
360 (raw-pair (if (interval-empty? y-ext) '(1 . -1) y-ext))
361 (raw-string collected))
364 (define (interpret-for-signature escape collect expr)
365 (define (interpret expr)
367 ((head (if (pair? expr)
372 ((eq? head 'grob-cause) (escape (cdr expr)))
373 ((eq? head 'color) (interpret (caddr expr)))
374 ((eq? head 'rotate-stencil) (interpret (caddr expr)))
375 ((eq? head 'translate-stencil) (interpret (caddr expr)))
376 ((eq? head 'combine-stencil)
377 (for-each (lambda (e) (interpret e)) (cdr expr)))
379 (collect (fold-false-pairs (strip-floats expr))))
385 (if (ly:grob? system-grob)
387 (display (format "# Output signature\n# Generated by LilyPond ~a\n" (lilypond-version))
389 (interpret-for-signature found-grob (lambda (x) #f)
391 (paper-system-stencil paper-system)))))
393 ;; should be superfluous, but leaking "too many open files"?