+;;;; This file is part of LilyPond, the GNU music typesetter.
+;;;;
+;;;; Copyright (C) 2003--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;;
+;;;; LilyPond is free software: you can redistribute it and/or modify
+;;;; it under the terms of the GNU General Public License as published by
+;;;; the Free Software Foundation, either version 3 of the License, or
+;;;; (at your option) any later version.
+;;;;
+;;;; LilyPond is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;;; GNU General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
-(define-public (stack-stencils axis dir padding mols)
- "Stack stencils MOLS in direction AXIS,DIR, using PADDING."
- (if (null? mols)
- '()
- (if (pair? mols)
- (ly:stencil-combine-at-edge (car mols) axis dir
- (stack-stencils axis dir padding (cdr mols))
- padding
- )
- )
- ))
-
-
-(define-public (stack-lines dir padding baseline mols)
- "Stack vertically with a baseline-skip."
- (if (null? mols)
- '()
- (if (null? (cdr mols))
- (car mols)
- (ly:stencil-combine-at-edge (car mols) Y dir
- (stack-lines dir padding baseline (cdr mols))
- padding baseline
- )
- )))
-
-(define-public (fontify-text font-metric text)
- "Set TEXT with font FONT-METRIC, returning a stencil."
- (let* ((b (ly:text-dimension font-metric text)))
- (ly:make-stencil
- (ly:fontify-atom font-metric `(text ,text)) (car b) (cdr b))
- ))
+(define (make-bezier-sandwich-stencil coords thick xext yext)
+ (let* ((command-list `(moveto
+ ,(car (list-ref coords 3))
+ ,(cdr (list-ref coords 3))
+ curveto
+ ,(car (list-ref coords 0))
+ ,(cdr (list-ref coords 0))
+ ,(car (list-ref coords 1))
+ ,(cdr (list-ref coords 1))
+ ,(car (list-ref coords 2))
+ ,(cdr (list-ref coords 2))
+ curveto
+ ,(car (list-ref coords 4))
+ ,(cdr (list-ref coords 4))
+ ,(car (list-ref coords 5))
+ ,(cdr (list-ref coords 5))
+ ,(car (list-ref coords 6))
+ ,(cdr (list-ref coords 6))
+ closepath)))
+ (ly:make-stencil
+ `(path ,thick `(,@' ,command-list) 'round 'round #t)
+ xext
+ yext)))
+
+(define-public (stack-stencils axis dir padding stils)
+ "Stack stencils @var{stils} in direction @var{axis}, @var{dir}, using
+@var{padding}."
+ (cond
+ ((null? stils) empty-stencil)
+ ((null? (cdr stils)) (car stils))
+ (else (ly:stencil-combine-at-edge
+ (car stils) axis dir (stack-stencils axis dir padding (cdr stils))
+ padding))))
+
+(define-public (stack-stencils-padding-list axis dir padding stils)
+ "Stack stencils @var{stils} in direction @var{axis}, @var{dir}, using
+a list of @var{padding}."
+ (cond
+ ((null? stils) empty-stencil)
+ ((null? (cdr stils)) (car stils))
+ (else (ly:stencil-combine-at-edge
+ (car stils)
+ axis dir
+ (stack-stencils-padding-list axis dir (cdr padding) (cdr stils))
+ (car padding)))))
+
+(define-public (centered-stencil stencil)
+ "Center stencil @var{stencil} in both the X and Y directions."
+ (ly:stencil-aligned-to (ly:stencil-aligned-to stencil X CENTER) Y CENTER))
+
+(define-public (stack-lines dir padding baseline stils)
+ "Stack vertically with a baseline skip."
+ (define result empty-stencil)
+ (define last-y #f)
+ (do
+ ((last-stencil #f (car p))
+ (p stils (cdr p)))
+
+ ((null? p))
+
+ (if (number? last-y)
+ (begin
+ (let* ((dy (max (+ (* dir (interval-bound (ly:stencil-extent last-stencil Y) dir))
+ padding
+ (* (- dir) (interval-bound (ly:stencil-extent (car p) Y) (- dir))))
+ baseline))
+ (y (+ last-y (* dir dy))))
+
+
+
+ (set! result
+ (ly:stencil-add result (ly:stencil-translate-axis (car p) y Y)))
+ (set! last-y y)))
+ (begin
+ (set! last-y 0)
+ (set! result (car p)))))
+
+ result)
-(define-public (bracketify-stencil mol axis thick protusion padding)
- "Add brackets around MOL, producing a new stencil."
- (let* ((ext (ly:stencil-get-extent mol axis))
- (lb (ly:bracket axis ext thick (- protusion)))
- (rb (ly:bracket axis ext thick protusion)))
- (set! mol (ly:stencil-combine-at-edge mol (other-axis axis) 1 lb padding))
- (set! mol (ly:stencil-combine-at-edge mol (other-axis axis) -1 rb padding))
- mol
- ))
+(define-public (bracketify-stencil stil axis thick protrusion padding)
+ "Add brackets around @var{stil}, producing a new stencil."
+
+ (let* ((ext (ly:stencil-extent stil axis))
+ (lb (ly:bracket axis ext thick protrusion))
+ (rb (ly:bracket axis ext thick (- protrusion))))
+ (set! stil
+ (ly:stencil-combine-at-edge stil (other-axis axis) 1 rb padding))
+ (set! stil
+ (ly:stencil-combine-at-edge lb (other-axis axis) 1 stil padding))
+ stil))
+
+(define (make-parenthesis-stencil
+ y-extent half-thickness width angularity)
+ "Create a parenthesis stencil.
+@var{y-extent} is the Y extent of the markup inside the parenthesis.
+@var{half-thickness} is the half thickness of the parenthesis.
+@var{width} is the width of a parenthesis.
+The higher the value of number @var{angularity},
+the more angular the shape of the parenthesis."
+ (let* ((line-width 0.1)
+ ;; Horizontal position of baseline that end points run through.
+ (base-x
+ (if (< width 0)
+ (- width)
+ 0))
+ ;; X value farthest from baseline on outside of curve
+ (outer-x (+ base-x width))
+ ;; X extent of bezier sandwich centerline curves
+ (x-extent (ordered-cons base-x outer-x))
+ (bottom-y (interval-start y-extent))
+ (top-y (interval-end y-extent))
+
+ (lower-end-point (cons base-x bottom-y))
+ (upper-end-point (cons base-x top-y))
+
+ (outer-control-x (+ base-x (* 4/3 width)))
+ (inner-control-x (+ outer-control-x
+ (if (< width 0)
+ half-thickness
+ (- half-thickness))))
+
+ ;; Vertical distance between a control point
+ ;; and the end point it connects to.
+ (offset-index (- (* 0.6 angularity) 0.8))
+ (lower-control-y (interval-index y-extent offset-index))
+ (upper-control-y (interval-index y-extent (- offset-index)))
+
+ (lower-outer-control-point
+ (cons outer-control-x lower-control-y))
+ (upper-outer-control-point
+ (cons outer-control-x upper-control-y))
+ (upper-inner-control-point
+ (cons inner-control-x upper-control-y))
+ (lower-inner-control-point
+ (cons inner-control-x lower-control-y)))
+
+ (make-bezier-sandwich-stencil
+ (list
+ ;; Step 4: curve through inner control points
+ ;; to lower end point.
+ upper-inner-control-point
+ lower-inner-control-point
+ lower-end-point
+ ;; Step 3: move to upper end point.
+ upper-end-point
+ ;; Step 2: curve through outer control points
+ ;; to upper end point.
+ lower-outer-control-point
+ upper-outer-control-point
+ upper-end-point
+ ;; Step 1: move to lower end point.
+ lower-end-point)
+ line-width
+ (interval-widen x-extent (/ line-width 2))
+ (interval-widen y-extent (/ line-width 2)))))
+
+(define-public (parenthesize-stencil
+ stencil half-thickness width angularity padding)
+ "Add parentheses around @var{stencil}, returning a new stencil."
+ (let* ((y-extent (ly:stencil-extent stencil Y))
+ (lp (make-parenthesis-stencil
+ y-extent half-thickness (- width) angularity))
+ (rp (make-parenthesis-stencil
+ y-extent half-thickness width angularity)))
+ (set! stencil (ly:stencil-combine-at-edge lp X RIGHT stencil padding))
+ (set! stencil (ly:stencil-combine-at-edge stencil X RIGHT rp padding))
+ stencil))
+
+(define-public (make-line-stencil width startx starty endx endy)
+ "Make a line stencil of given linewidth and set its extents accordingly."
+ (let ((xext (cons (min startx endx) (max startx endx)))
+ (yext (cons (min starty endy) (max starty endy))))
+ (ly:make-stencil
+ (list 'draw-line width startx starty endx endy)
+ ; Since the line has rounded edges, we have to / can safely add half the
+ ; width to all coordinates!
+ (interval-widen xext (/ width 2))
+ (interval-widen yext (/ width 2)))))
+
(define-public (make-filled-box-stencil xext yext)
"Make a filled box."
-
+
+ (ly:make-stencil
+ (list 'round-filled-box (- (car xext)) (cdr xext)
+ (- (car yext)) (cdr yext) 0.0)
+ xext yext))
+
+(define-public (make-circle-stencil radius thickness fill)
+ "Make a circle of radius @var{radius} and thickness @var{thickness}."
+ (let*
+ ((out-radius (+ radius (/ thickness 2.0))))
+
+ (ly:make-stencil
+ (list 'circle radius thickness fill)
+ (cons (- out-radius) out-radius)
+ (cons (- out-radius) out-radius))))
+
+(define-public (make-oval-stencil x-radius y-radius thickness fill)
+ "Make an oval from two Bezier curves, of x@tie{}radius @var{x-radius},
+y@tie{}radius @code{y-radius}, and thickness @var{thickness} with fill
+defined by @code{fill}."
+ (let*
+ ((x-out-radius (+ x-radius (/ thickness 2.0)))
+ (y-out-radius (+ y-radius (/ thickness 2.0)))
+ (x-max x-radius)
+ (x-min (- x-radius))
+ (y-max y-radius)
+ (y-min (- y-radius))
+ (commands `(,(list 'moveto x-max 0)
+ ,(list 'curveto x-max y-max x-min y-max x-min 0)
+ ,(list 'curveto x-min y-min x-max y-min x-max 0)
+ ,(list 'closepath)))
+ (command-list (fold-right append '() commands)))
+ (ly:make-stencil
+ `(path ,thickness `(,@',command-list) 'round 'round ,fill)
+ (cons (- x-out-radius) x-out-radius)
+ (cons (- y-out-radius) y-out-radius))))
+
+(define-public
+ (make-partial-ellipse-stencil
+ x-radius y-radius start-angle end-angle thick connect fill)
+
+ (define (make-radius-list x-radius y-radius)
+ (apply append
+ (map (lambda (adder)
+ (map (lambda (quadrant)
+ (cons (+ adder (car quadrant))
+ (cdr quadrant)))
+ `((0.0 . (,x-radius . 0.0))
+ (,PI-OVER-TWO . (0.0 . ,y-radius))
+ (,PI . (,(- x-radius) . 0.0))
+ (,THREE-PI-OVER-TWO . (0.0 . ,(- y-radius))))))
+ `(0.0 ,TWO-PI))))
+
+ (define
+ (insert-in-ordered-list ordering-function value inlist cutl? cutr?)
+ (define
+ (helper ordering-function value left-list right-list cutl? cutr?)
+ (if (null? right-list)
+ (append
+ (if cutl? '() left-list)
+ (list value)
+ (if cutr? '() right-list))
+ (if (ordering-function value (car right-list))
+ (append
+ (if cutl? '() left-list)
+ (list value)
+ (if cutr? '() right-list))
+ (helper
+ ordering-function
+ value
+ (append left-list (list (car right-list)))
+ (cdr right-list)
+ cutl?
+ cutr?))))
+ (helper ordering-function value '() inlist cutl? cutr?))
+
+ (define (ordering-function-1 a b) (car< a b))
+
+ (define (ordering-function-2 a b) (car<= a b))
+
+ (define (min-max-crawler min-max side l)
+ (reduce min-max
+ (if (eq? min-max min) 100000 -100000)
+ (map (lambda (x) (side x)) l)))
+
+ (let*
+ ((x-out-radius (+ x-radius (/ thick 2.0)))
+ (y-out-radius (+ y-radius (/ thick 2.0)))
+ (new-end-angle (angle-0-2pi (degrees->radians end-angle)))
+ (end-radius (ellipse-radius x-out-radius y-out-radius new-end-angle))
+ (new-start-angle (angle-0-2pi (degrees->radians start-angle)))
+ (start-radius (ellipse-radius x-out-radius y-out-radius new-start-angle))
+ (radius-list (make-radius-list x-out-radius y-out-radius))
+ (rectangular-end-radius (polar->rectangular end-radius end-angle))
+ (rectangular-start-radius (polar->rectangular start-radius start-angle))
+ (new-end-angle
+ (if (<= new-end-angle new-start-angle)
+ (+ TWO-PI new-end-angle)
+ new-end-angle))
+ (possible-extrema
+ (insert-in-ordered-list
+ ordering-function-2
+ (cons new-end-angle rectangular-end-radius)
+ (insert-in-ordered-list
+ ordering-function-1
+ (cons new-start-angle rectangular-start-radius)
+ radius-list
+ #t
+ #f)
+ #f
+ #t)))
+ (ly:make-stencil
+ (list
+ 'partial-ellipse
+ x-radius
+ y-radius
+ start-angle
+ end-angle
+ thick
+ connect
+ fill)
+ (cons (min-max-crawler min cadr possible-extrema)
+ (min-max-crawler max cadr possible-extrema))
+ (cons (min-max-crawler min cddr possible-extrema)
+ (min-max-crawler max cddr possible-extrema)))))
+
+(define (path-min-max origin pointlist)
+
+ (define (line-part-min-max x1 x2)
+ (list (min x1 x2) (max x1 x2)))
+
+ (define (bezier-part-min-max x1 x2 x3 x4)
+ ((lambda (x) (list (reduce min 10000 x) (reduce max -10000 x)))
+ (map
+ (lambda (x)
+ (+ (* x1 (expt (- 1 x) 3))
+ (+ (* 3 (* x2 (* (expt (- 1 x) 2) x)))
+ (+ (* 3 (* x3 (* (- 1 x) (expt x 2))))
+ (* x4 (expt x 3))))))
+ (if (< (+ (expt x2 2) (+ (expt x3 2) (* x1 x4)))
+ (+ (* x1 x3) (+ (* x2 x4) (* x2 x3))))
+ (list 0.0 1.0)
+ (filter
+ (lambda (x) (and (>= x 0) (<= x 1)))
+ (append
+ (list 0.0 1.0)
+ (map (lambda (op)
+ (if (not (eqv? 0.0
+ (- (+ x1 (* 3 x3)) (+ x4 (* 3 x2)))))
+ ;; Zeros of the bezier curve
+ (/ (+ (- x1 (* 2 x2))
+ (op x3
+ (sqrt (- (+ (expt x2 2)
+ (+ (expt x3 2) (* x1 x4)))
+ (+ (* x1 x3)
+ (+ (* x2 x4) (* x2 x3)))))))
+ (- (+ x1 (* 3 x3)) (+ x4 (* 3 x2))))
+ ;; Apply L'hopital's rule to get the zeros if 0/0
+ (* (op 0 1)
+ (/ (/ (- x4 x3) 2)
+ (sqrt (- (+ (* x2 x2)
+ (+ (* x3 x3) (* x1 x4)))
+ (+ (* x1 x3)
+ (+ (* x2 x4) (* x2 x3)))))))))
+ (list + -))))))))
+
+ (define (bezier-min-max x1 y1 x2 y2 x3 y3 x4 y4)
+ (map (lambda (x)
+ (apply bezier-part-min-max x))
+ `((,x1 ,x2 ,x3 ,x4) (,y1 ,y2 ,y3 ,y4))))
+
+ (define (line-min-max x1 y1 x2 y2)
+ (map (lambda (x)
+ (apply line-part-min-max x))
+ `((,x1 ,x2) (,y1 ,y2))))
+
+ ((lambda (x)
+ (list
+ (reduce min +inf.0 (map caar x))
+ (reduce max -inf.0 (map cadar x))
+ (reduce min +inf.0 (map caadr x))
+ (reduce max -inf.0 (map cadadr x))))
+ (map (lambda (x)
+ (if (eq? (length x) 8)
+ (apply bezier-min-max x)
+ (apply line-min-max x)))
+ (map (lambda (x y)
+ (append (list (cadr (reverse x)) (car (reverse x))) y))
+ (append (list origin)
+ (reverse (cdr (reverse pointlist)))) pointlist))))
+
+(define-public (make-connected-path-stencil pointlist thickness
+ x-scale y-scale connect fill)
+ "Make a connected path described by the list @var{pointlist}, with
+thickness @var{thickness}, and scaled by @var{x-scale} in the X direction
+and @var{y-scale} in the Y direction. @var{connect} and @var{fill} are
+boolean arguments that specify if the path should be connected or filled,
+respectively."
+
+ ;; paths using this routine are designed to begin at point '(0 . 0)
+ (let* ((origin (list 0 0))
+ (boundlist (path-min-max origin pointlist))
+ ;; modify pointlist to scale the coordinates
+ (path (map (lambda (x)
+ (apply
+ (if (eq? 6 (length x))
+ (lambda (x1 x2 x3 x4 x5 x6)
+ (list 'curveto
+ (* x1 x-scale)
+ (* x2 y-scale)
+ (* x3 x-scale)
+ (* x4 y-scale)
+ (* x5 x-scale)
+ (* x6 y-scale)))
+ (lambda (x1 x2)
+ (list 'lineto
+ (* x1 x-scale)
+ (* x2 y-scale))))
+ x))
+ pointlist))
+ ;; a path must begin with a `moveto'
+ (prepend-origin (apply list (cons 'moveto origin) path))
+ ;; if this path is connected, add closepath to the end
+ (final-path (if connect
+ (append prepend-origin (list 'closepath))
+ prepend-origin))
+ (command-list (fold-right append '() final-path)))
(ly:make-stencil
- (list 'filledbox (- (car xext)) (cdr xext)
- (- (car yext)) (cdr yext))
- xext yext)
-)
+ `(path ,thickness
+ `(,@',command-list)
+ 'round
+ 'round
+ ,(if fill #t #f))
+ (coord-translate
+ ((if (< x-scale 0) reverse-interval identity)
+ (cons (* x-scale (list-ref boundlist 0))
+ (* x-scale (list-ref boundlist 1))))
+ `(,(/ thickness -2) . ,(/ thickness 2)))
+ (coord-translate
+ ((if (< y-scale 0) reverse-interval identity)
+ (cons (* y-scale (list-ref boundlist 2))
+ (* y-scale (list-ref boundlist 3))))
+ `(,(/ thickness -2) . ,(/ thickness 2))))))
+
+(define-public (make-ellipse-stencil x-radius y-radius thickness fill)
+ "Make an ellipse of x@tie{}radius @var{x-radius}, y@tie{}radius
+@code{y-radius}, and thickness @var{thickness} with fill defined by
+@code{fill}."
+ (let*
+ ((x-out-radius (+ x-radius (/ thickness 2.0)))
+ (y-out-radius (+ y-radius (/ thickness 2.0))) )
+ (ly:make-stencil
+ (list 'ellipse x-radius y-radius thickness fill)
+ (cons (- x-out-radius) x-out-radius)
+ (cons (- y-out-radius) y-out-radius))))
(define-public (box-grob-stencil grob)
"Make a box of exactly the extents of the grob. The box precisely
-encloses the contents.
-"
+encloses the contents."
(let* ((xext (ly:grob-extent grob grob 0))
(yext (ly:grob-extent grob grob 1))
- (thick 0.1))
-
- (ly:stencil-add (make-filled-box-stencil xext (cons (- (car yext) thick) (car yext) ))
- (make-filled-box-stencil xext (cons (cdr yext) (+ (cdr yext) thick) ))
- (make-filled-box-stencil (cons (cdr xext) (+ (cdr xext) thick)) yext)
- (make-filled-box-stencil (cons (- (car xext) thick) (car xext)) yext))))
-
-
-;; TODO merge this and prev function.
-(define-public (box-stencil mol thick padding)
- "Add a box around MOL, producing a new stencil."
- (let* (
- (x-ext (interval-widen (ly:stencil-get-extent mol 0) padding))
- (y-ext (interval-widen (ly:stencil-get-extent mol 1) padding))
- (y-rule (make-filled-box-stencil (cons 0 thick) y-ext))
- (x-rule (make-filled-box-stencil (interval-widen x-ext thick)
- (cons 0 thick)))
- )
- (set! mol (ly:stencil-combine-at-edge mol X 1 y-rule padding))
- (set! mol (ly:stencil-combine-at-edge mol X -1 y-rule padding))
- (set! mol (ly:stencil-combine-at-edge mol Y 1 x-rule 0.0))
- (set! mol (ly:stencil-combine-at-edge mol Y -1 x-rule 0.0))
-
- mol))
+ (thick 0.01))
+
+ (ly:stencil-add
+ (make-filled-box-stencil xext (cons (- (car yext) thick) (car yext)))
+ (make-filled-box-stencil xext (cons (cdr yext) (+ (cdr yext) thick)))
+ (make-filled-box-stencil (cons (cdr xext) (+ (cdr xext) thick)) yext)
+ (make-filled-box-stencil (cons (- (car xext) thick) (car xext)) yext))))
+
+;; TODO merge this and prev function.
+(define-public (box-stencil stencil thickness padding)
+ "Add a box around @var{stencil}, producing a new stencil."
+ (let* ((x-ext (interval-widen (ly:stencil-extent stencil 0) padding))
+ (y-ext (interval-widen (ly:stencil-extent stencil 1) padding))
+ (y-rule (make-filled-box-stencil (cons 0 thickness) y-ext))
+ (x-rule (make-filled-box-stencil
+ (interval-widen x-ext thickness) (cons 0 thickness))))
+ (set! stencil (ly:stencil-combine-at-edge stencil X 1 y-rule padding))
+ (set! stencil (ly:stencil-combine-at-edge stencil X -1 y-rule padding))
+ (set! stencil (ly:stencil-combine-at-edge stencil Y 1 x-rule 0.0))
+ (set! stencil (ly:stencil-combine-at-edge stencil Y -1 x-rule 0.0))
+ stencil))
+
+(define-public (circle-stencil stencil thickness padding)
+ "Add a circle around @var{stencil}, producing a new stencil."
+ (let* ((x-ext (ly:stencil-extent stencil X))
+ (y-ext (ly:stencil-extent stencil Y))
+ (diameter (max (interval-length x-ext)
+ (interval-length y-ext)))
+ (radius (+ (/ diameter 2) padding thickness))
+ (circle (make-circle-stencil radius thickness #f)))
+
+ (ly:stencil-add
+ stencil
+ (ly:stencil-translate circle
+ (cons
+ (interval-center x-ext)
+ (interval-center y-ext))))))
+
+(define-public (oval-stencil stencil thickness x-padding y-padding)
+ "Add an oval around @code{stencil}, padded by the padding pair,
+producing a new stencil."
+ (let* ((x-ext (ly:stencil-extent stencil X))
+ (y-ext (ly:stencil-extent stencil Y))
+ (x-length (+ (interval-length x-ext) x-padding thickness))
+ (y-length (+ (interval-length y-ext) y-padding thickness))
+ (x-radius (* 0.707 x-length) )
+ (y-radius (* 0.707 y-length) )
+ (oval (make-oval-stencil x-radius y-radius thickness #f)))
+
+ (ly:stencil-add
+ stencil
+ (ly:stencil-translate oval
+ (cons
+ (interval-center x-ext)
+ (interval-center y-ext))))))
+
+(define-public (ellipse-stencil stencil thickness x-padding y-padding)
+ "Add an ellipse around @var{stencil}, padded by the padding pair,
+producing a new stencil."
+ (let* ((x-ext (ly:stencil-extent stencil X))
+ (y-ext (ly:stencil-extent stencil Y))
+ (x-length (+ (interval-length x-ext) x-padding thickness))
+ (y-length (+ (interval-length y-ext) y-padding thickness))
+ ;(aspect-ratio (/ x-length y-length))
+ (x-radius (* 0.707 x-length) )
+ (y-radius (* 0.707 y-length) )
+ ;(diameter (max (- (cdr x-ext) (car x-ext))
+ ; (- (cdr y-ext) (car y-ext))))
+ ;(radius (+ (/ diameter 2) padding thickness))
+ (ellipse (make-ellipse-stencil x-radius y-radius thickness #f)))
+
+ (ly:stencil-add
+ stencil
+ (ly:stencil-translate ellipse
+ (cons
+ (interval-center x-ext)
+ (interval-center y-ext))))))
+
+(define-public (rounded-box-stencil stencil thickness padding blot)
+ "Add a rounded box around @var{stencil}, producing a new stencil."
+
+ (let* ((xext (interval-widen (ly:stencil-extent stencil 0) padding))
+ (yext (interval-widen (ly:stencil-extent stencil 1) padding))
+ (min-ext (min (-(cdr xext) (car xext)) (-(cdr yext) (car yext))))
+ (ideal-blot (min blot (/ min-ext 2)))
+ (ideal-thickness (min thickness (/ min-ext 2)))
+ (outer (ly:round-filled-box
+ (interval-widen xext ideal-thickness)
+ (interval-widen yext ideal-thickness)
+ ideal-blot))
+ (inner (ly:make-stencil (list 'color (x11-color 'white)
+ (ly:stencil-expr (ly:round-filled-box
+ xext yext (- ideal-blot ideal-thickness)))))))
+ (set! stencil (ly:stencil-add outer inner))
+ stencil))
+
+(define-public (stencil-with-color stencil color)
+ (ly:make-stencil
+ (list 'color color (ly:stencil-expr stencil))
+ (ly:stencil-extent stencil X)
+ (ly:stencil-extent stencil Y)))
+
+(define-public (stencil-whiteout stencil)
+ (let*
+ ((x-ext (ly:stencil-extent stencil X))
+ (y-ext (ly:stencil-extent stencil Y))
+
+ )
+
+ (ly:stencil-add
+ (stencil-with-color (ly:round-filled-box x-ext y-ext 0.0)
+ white)
+ stencil)
+ ))
+
+(define-public (arrow-stencil-maker start? end?)
+ "Return a function drawing a line from current point to @code{destination},
+with optional arrows of @code{max-size} on start and end controlled by
+@var{start?} and @var{end?}."
+ (lambda (destination max-size)
+ (let*
+ ((e_x 1+0i)
+ (e_y 0+1i)
+ (distance (sqrt (+ (* (car destination) (car destination))
+ (* (cdr destination) (cdr destination)))))
+ (size (min max-size (/ distance 3)))
+ (rotate (lambda (z ang)
+ (* (make-polar 1 ang)
+ z)))
+ (complex-to-offset (lambda (z)
+ (list (real-part z) (imag-part z))))
+
+ (z-dest (+ (* e_x (car destination)) (* e_y (cdr destination))))
+ (e_z (/ z-dest (magnitude z-dest)))
+ (triangle-points (list
+ (* size -1+0.25i)
+ 0
+ (* size -1-0.25i)))
+ (p1s (map (lambda (z)
+ (+ z-dest (rotate z (angle z-dest))))
+ triangle-points))
+ (p2s (map (lambda (z)
+ (rotate z (angle (- z-dest))))
+ triangle-points))
+ (null (cons 0 0))
+ (arrow-1
+ (ly:make-stencil
+ `(polygon (quote ,(concatenate (map complex-to-offset p1s)))
+ 0.0
+ #t) null null))
+ (arrow-2
+ (ly:make-stencil
+ `(polygon (quote ,(concatenate (map complex-to-offset p2s)))
+ 0.0
+ #t) null null ) )
+ (thickness (min (/ distance 12) 0.1))
+ (shorten-line (min (/ distance 3) 0.5))
+ (start (complex-to-offset (/ (* e_z shorten-line) 2)))
+ (end (complex-to-offset (- z-dest (/ (* e_z shorten-line) 2))))
+
+ (line (ly:make-stencil
+ `(draw-line ,thickness
+ ,(car start) ,(cadr start)
+ ,(car end) ,(cadr end)
+ )
+ (cons (min 0 (car destination))
+ (min 0 (cdr destination)))
+ (cons (max 0 (car destination))
+ (max 0 (cdr destination)))))
+
+ (result
+ (ly:stencil-add
+ (if start? arrow-2 empty-stencil)
+ (if end? arrow-1 empty-stencil)
+ line)))
+
+ result)))
+
+(define-public dimension-arrows (arrow-stencil-maker #t #t))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; ANNOTATIONS
+;;
+;; annotations are arrows indicating the numerical value of
+;; spacing variables
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define*-public (annotate-y-interval layout name extent is-length
+ #:key (color darkblue))
+ (let ((text-props (cons '((font-size . -3)
+ (font-family . typewriter))
+ (layout-extract-page-properties layout)))
+ (annotation #f))
+ (define (center-stencil-on-extent stil)
+ (ly:stencil-translate (ly:stencil-aligned-to stil Y CENTER)
+ (cons 0 (interval-center extent))))
+ ;; do something sensible for 0,0 intervals.
+ (set! extent (interval-widen extent 0.001))
+ (if (not (interval-sane? extent))
+ (set! annotation (interpret-markup
+ layout text-props
+ (make-simple-markup (simple-format #f "~a: NaN/inf" name))))
+ (let ((text-stencil (interpret-markup
+ layout text-props
+ (markup #:whiteout #:simple name)))
+ (dim-stencil (interpret-markup
+ layout text-props
+ (markup #:whiteout
+ #:simple (cond
+ ((interval-empty? extent)
+ "empty")
+ (is-length
+ (ly:format "~$" (interval-length extent)))
+ (else
+ (ly:format "(~$,~$)"
+ (car extent) (cdr extent)))))))
+ (arrows (ly:stencil-translate-axis
+ (dimension-arrows (cons 0 (interval-length extent)) 1.0)
+ (interval-start extent) Y)))
+ (set! annotation
+ (center-stencil-on-extent text-stencil))
+ (set! annotation
+ (ly:stencil-combine-at-edge arrows X RIGHT annotation 0.5))
+ (set! annotation
+ (ly:stencil-combine-at-edge annotation X LEFT
+ (center-stencil-on-extent dim-stencil)
+ 0.5))
+ (set! annotation
+ (stencil-with-color annotation color))))
+ annotation))
+
+
+;; TODO: figure out how to annotate padding nicely
+;; TODO: emphasize either padding or min-dist depending on which constraint was active
+(define*-public (annotate-spacing-spec layout spacing-spec start-Y-offset next-staff-Y
+ #:key (base-color blue))
+ (let* ((get-spacing-var (lambda (sym) (assoc-get sym spacing-spec 0.0)))
+ (space (get-spacing-var 'basic-distance))
+ (padding (get-spacing-var 'padding))
+ (min-dist (get-spacing-var 'minimum-distance))
+ (contrast-color (append (cdr base-color) (list (car base-color))))
+ (min-dist-blocks (<= (- start-Y-offset min-dist) next-staff-Y))
+ (min-dist-color (if min-dist-blocks contrast-color base-color))
+ (basic-annotation (annotate-y-interval layout
+ "basic-dist"
+ (cons (- start-Y-offset space) start-Y-offset)
+ #t
+ #:color (map (lambda (x) (* x 0.25)) base-color)))
+ (min-annotation (annotate-y-interval layout
+ "min-dist"
+ (cons (- start-Y-offset min-dist) start-Y-offset)
+ #t
+ #:color min-dist-color))
+ (extra-annotation (annotate-y-interval layout
+ "extra dist"
+ (cons next-staff-Y (- start-Y-offset min-dist))
+ #t
+ #:color (map (lambda (x) (* x 0.5)) min-dist-color))))
+
+ (stack-stencils X RIGHT 0.0
+ (list
+ basic-annotation
+ (if min-dist-blocks
+ min-annotation
+ (ly:stencil-add min-annotation extra-annotation))))))
+
+(define-public (eps-file->stencil axis size file-name)
+ (let*
+ ((contents (ly:gulp-file file-name))
+ (bbox (get-postscript-bbox (car (string-split contents #\nul))))
+ (bbox-size (if (= axis X)
+ (- (list-ref bbox 2) (list-ref bbox 0))
+ (- (list-ref bbox 3) (list-ref bbox 1))
+ ))
+ (factor (if (< 0 bbox-size)
+ (exact->inexact (/ size bbox-size))
+ 0))
+ (scaled-bbox
+ (map (lambda (x) (* factor x)) bbox))
+ ; We need to shift the whole eps to (0,0), otherwise it will appear
+ ; displaced in lilypond (displacement will depend on the scaling!)
+ (translate-string (ly:format "~a ~a translate" (- (list-ref bbox 0)) (- (list-ref bbox 1))))
+ (clip-rect-string (ly:format
+ "~a ~a ~a ~a rectclip"
+ (list-ref bbox 0)
+ (list-ref bbox 1)
+ (- (list-ref bbox 2) (list-ref bbox 0))
+ (- (list-ref bbox 3) (list-ref bbox 1)))))
+
+
+ (if bbox
+ (ly:make-stencil
+ (list
+ 'embedded-ps
+ (string-append
+ (ly:format
+ "
+gsave
+currentpoint translate
+BeginEPSF
+~a dup scale
+~a
+~a
+%%BeginDocument: ~a
+" factor translate-string clip-rect-string
+
+ file-name
+ )
+ contents
+ "%%EndDocument
+EndEPSF
+grestore
+"))
+ ; Stencil starts at (0,0), since we have shifted the eps, and its
+ ; size is exactly the size of the scaled bounding box
+ (cons 0 (- (list-ref scaled-bbox 2) (list-ref scaled-bbox 0)))
+ (cons 0 (- (list-ref scaled-bbox 3) (list-ref scaled-bbox 1))))
+
+ (ly:make-stencil "" '(0 . 0) '(0 . 0)))
+ ))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; output signatures.
+
+(define-public (write-system-signatures basename paper-systems count)
+ (if (pair? paper-systems)
+ (begin
+ (let*
+ ((outname (simple-format #f "~a-~a.signature" basename count)) )
+
+ (ly:message "Writing ~a" outname)
+ (write-system-signature outname (car paper-systems))
+ (write-system-signatures basename (cdr paper-systems) (1+ count))))))
+
+(use-modules (scm paper-system))
+(define-public (write-system-signature filename paper-system)
+ (define (float? x)
+ (and (number? x) (inexact? x)))
+
+ (define system-grob
+ (paper-system-system-grob paper-system))
+
+ (define output (open-output-file filename))
+
+ ;; todo: optionally use a command line flag? Or just junk this?
+ (define compare-expressions #f)
+ (define (strip-floats expr)
+ "Replace floats by #f"
+ (cond
+ ((float? expr) #f)
+ ((ly:font-metric? expr) (ly:font-name expr))
+ ((pair? expr) (cons (strip-floats (car expr))
+ (strip-floats (cdr expr))))
+ (else expr)))
+
+ (define (fold-false-pairs expr)
+ "Try to remove lists of #f as much as possible."
+ (if (pair? expr)
+ (let*
+ ((first (car expr))
+ (rest (fold-false-pairs (cdr expr))))
+
+ (if first
+ (cons (fold-false-pairs first) rest)
+ rest))
+ expr))
+
+ (define (raw-string expr)
+ "escape quotes and slashes for python consumption"
+ (regexp-substitute/global #f "[@\n]" (simple-format #f "~a" expr) 'pre " " 'post))
+
+ (define (raw-pair expr)
+ (simple-format #f "~a ~a"
+ (car expr) (cdr expr)))
+
+ (define (found-grob expr)
+ (let*
+ ((grob (car expr))
+ (rest (cdr expr))
+ (collected '())
+ (cause (event-cause grob))
+ (input (if (ly:stream-event? cause) (ly:event-property cause 'origin) #f))
+ (location (if (ly:input-location? input) (ly:input-file-line-char-column input) '()))
+
+ ;; todo: use stencil extent if available.
+ (x-ext (ly:grob-extent grob system-grob X))
+ (y-ext (ly:grob-extent grob system-grob Y))
+ (expression-skeleton
+ (if compare-expressions
+ (interpret-for-signature
+ #f (lambda (e)
+ (set! collected (cons e collected)))
+ rest)
+ "")))
+
+ (simple-format output
+ "~a@~a@~a@~a@~a\n"
+ (cdr (assq 'name (ly:grob-property grob 'meta) ))
+ (raw-string location)
+ (raw-pair (if (interval-empty? x-ext) '(1 . -1) x-ext))
+ (raw-pair (if (interval-empty? y-ext) '(1 . -1) y-ext))
+ (raw-string collected))
+ ))
+
+ (define (interpret-for-signature escape collect expr)
+ (define (interpret expr)
+ (let*
+ ((head (if (pair? expr)
+ (car expr)
+ #f)))
+
+ (cond
+ ((eq? head 'grob-cause) (escape (cdr expr)))
+ ((eq? head 'color) (interpret (caddr expr)))
+ ((eq? head 'rotate-stencil) (interpret (caddr expr)))
+ ((eq? head 'translate-stencil) (interpret (caddr expr)))
+ ((eq? head 'combine-stencil)
+ (for-each (lambda (e) (interpret e)) (cdr expr)))
+ (else
+ (collect (fold-false-pairs (strip-floats expr))))
+
+ )))
+
+ (interpret expr))
+
+ (if (ly:grob? system-grob)
+ (begin
+ (display (simple-format #f "# Output signature\n# Generated by LilyPond ~a\n" (lilypond-version))
+ output)
+ (interpret-for-signature found-grob (lambda (x) #f)
+ (ly:stencil-expr
+ (paper-system-stencil paper-system)))))
+
+ ;; should be superfluous, but leaking "too many open files"?
+ (close-port output))
+
projects / lilypond.git / blobdiff