;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; Copyright (C) 2003--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;; 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
;;;; You should have received a copy of the GNU General Public License
;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+(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 STILS in direction AXIS, DIR, using 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 STILS in direction AXIS, DIR, using a list of 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)))))
+ "Stack stencils @var{stils} in direction @var{axis}, @var{dir}, using
+@var{padding}."
+ (reduce
+ (lambda (next front)
+ (ly:stencil-stack front axis dir next padding))
+ empty-stencil
+ stils))
+
+(define-public (stack-stencils-padding-list axis dir paddings stils)
+ "Stack stencils @var{stils} in direction @var{axis}, @var{dir}, using
+a list of @var{paddings}."
+ (if (null? stils)
+ empty-stencil
+ (fold
+ (lambda (next padding front)
+ (ly:stencil-stack front axis dir next padding))
+ (car stils)
+ (cdr stils)
+ paddings)))
(define-public (centered-stencil stencil)
- "Center stencil @var{stencil} in both the X and Y directions"
+ "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)
-
+ "Stack vertically with a baseline skip."
+ (reduce-right
+ (lambda (next back) (ly:stencil-stack next Y dir back padding baseline))
+ empty-stencil
+ (map
+ (lambda (s)
+ ;; X-empty stencils may add vertical space. A stencil that is
+ ;; merely Y-empty counts as horizontal spacing. Since we want
+ ;; those to register as lines of their own (is this a good
+ ;; idea?), we make them a separately visible line.
+ (if (and (ly:stencil-empty? s Y)
+ (not (ly:stencil-empty? s X)))
+ (ly:make-stencil (ly:stencil-expr s) (ly:stencil-extent s X) '(0 . 0))
+ s))
+ stils)))
(define-public (bracketify-stencil stil axis thick protrusion padding)
- "Add brackets around STIL, producing a new stencil."
+ "Add brackets around @var{stil}, producing a new stencil."
(let* ((ext (ly:stencil-extent stil axis))
(lb (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))
+ (ly:stencil-combine-at-edge stil (other-axis axis) -1 lb padding))
stil))
(define (make-parenthesis-stencil
(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))
(if (< width 0)
half-thickness
(- half-thickness))))
- (x-extent (ordered-cons base-x outer-control-x))
;; Vertical distance between a control point
;; and the end point it connects to.
(lower-inner-control-point
(cons inner-control-x lower-control-y)))
- (ly:make-stencil
- (list 'bezier-sandwich
- `(quote ,(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)))))
+ (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)
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 LEFT lp 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"
+ "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!
+ ;; 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)))))
xext yext))
(define-public (make-circle-stencil radius thickness fill)
- "Make a circle of radius @var{radius} and thickness @var{thickness}"
+ "Make a circle of radius @var{radius} and thickness @var{thickness}."
(let*
((out-radius (+ radius (/ thickness 2.0))))
(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 radius @var{x-radius},
- y radius @code{y-radius},
- and thickness @var{thickness} with fill defined by @code{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))) )
+ (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)
+ "Create an elliptical arc
+@var{x-radius} is the X radius of the arc.
+@var{y-radius} is the Y radius of the arc.
+@var{start-angle} is the starting angle of the arc in degrees.
+@var{end-angle} is the ending angle of the arc in degrees.
+@var{thick} is the thickness of the line.
+@var{connect} is a boolean flag indicating if the end should
+be connected to the start by a line.
+@var{fill} is a boolean flag indicating if the shape should be filled."
+ (define (make-radius-list x-radius y-radius)
+ "Makes a list of angle/radius pairs at intervals of PI/2 for
+the partial ellipse until 7*PI/2. For example, in pseudo-code:
+> (make-radius-list 2 3)
+((0.0 . 2) (PI/2 . 3) (PI . -2) (3*PI/2 . -3)
+(2*PI . 2) (5*PI/2 . 3) (3*PI . -2) (7*PI/2 . -3))
+"
+ (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?)
+ "Insert @var{value} in ordered list @var{inlist}. If @var{cutl?}, we
+cut away any parts of @var{inlist} before @var{value}. @var{cutr?} works
+the same way but for the right side. For example:
+> (insert-in-ordered-list < 4 '(1 2 3 6 7) #f #f)
+'(1 2 3 4 6 7)
+> (insert-in-ordered-list < 4 '(1 2 3 6 7) #t #f)
+'(4 6 7)
+> (insert-in-ordered-list < 4 '(1 2 3 6 7) #f #t)
+'(1 2 3 4)
+"
+ (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)
+ "Apply function @var{side} to each member of list and
+then reduce using @var{min-max}:
+> (min-max-crawler min car '((0 . 3) (-1 . 4) (1 . 2)))
+-1
+> (min-max-crawler min cdr '((0 . 3) (-1 . 4) (1 . 2)))
+2
+"
+ (reduce min-max
+ (if (eq? min-max min) 100000 -100000)
+ (map (lambda (x) (side x)) l)))
+ (let*
+ (;; the outside limit of the x-radius
+ (x-out-radius (+ x-radius (/ thick 2.0)))
+ ;; the outside limit of the y-radius
+ (y-out-radius (+ y-radius (/ thick 2.0)))
+ ;; end angle to radians
+ (new-end-angle (angle-0-2pi (degrees->radians end-angle)))
+ ;; length of the radius at the end angle
+ (end-radius (ellipse-radius x-out-radius y-out-radius new-end-angle))
+ ;; start angle to radians
+ (new-start-angle (angle-0-2pi (degrees->radians start-angle)))
+ ;; length of the radius at the start angle
+ (start-radius (ellipse-radius x-out-radius y-out-radius new-start-angle))
+ ;; points that the arc passes through at 90 degree intervals
+ (radius-list (make-radius-list x-out-radius y-out-radius))
+ ;; rectangular coordinates of arc endpoint
+ (rectangular-end-radius (polar->rectangular end-radius end-angle))
+ ;; rectangular coordinates of arc begin point
+ (rectangular-start-radius (polar->rectangular start-radius start-angle))
+ ;; we want the end angle to always be bigger than the start angle
+ ;; so we redefine it here just in case it is less
+ (new-end-angle
+ (if (<= new-end-angle new-start-angle)
+ (+ TWO-PI new-end-angle)
+ new-end-angle))
+ ;; all the points that may be extrema of the arc
+ ;; this is the 90 degree points plus the beginning and end points
+ ;; we use this to calculate extents
+ (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)
+ ;; we know the extrema points by crawling through the
+ ;; list of possible extrema and finding the min and max
+ ;; for x and y
+ (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 (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
+ (exact->inexact (- (+ 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))))
+
+(define (path-min-max origin pointlist)
+
+ ((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 (= (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 (= 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 'oval x-radius y-radius thickness fill)
- (cons (- x-out-radius) x-out-radius)
- (cons (- y-out-radius) y-out-radius))))
+ `(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 radius @var{x-radius}, y radius @code{y-radius},
- and thickness @var{thickness} with fill defined by @code{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))) )
(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 0.01))
;; TODO merge this and prev function.
(define-public (box-stencil stencil thickness padding)
- "Add a box around STENCIL, producing a new stencil."
+ "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))
stencil))
(define-public (circle-stencil stencil thickness padding)
- "Add a circle around STENCIL, producing a new stencil."
+ "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)
(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."
+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))
(interval-center y-ext))))))
(define-public (ellipse-stencil stencil thickness x-padding y-padding)
- "Add an ellipse around STENCIL, padded by the padding pair,
- producing a new stencil."
+ "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))
+ ;; (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))
+ ;; (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
(interval-center y-ext))))))
(define-public (rounded-box-stencil stencil thickness padding blot)
- "Add a rounded box around STENCIL, producing a new stencil."
+ "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))
(set! stencil (ly:stencil-add outer inner))
stencil))
-
-(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
- `(text ,font-metric ,text) (car b) (cdr b))))
-
-(define-public (fontify-text-white scale font-metric text)
- "Set TEXT with scale factor SCALE"
- (let* ((b (ly:text-dimension font-metric text))
- ;;urg -- workaround for using ps font
- (c `(white-text ,(* 2 scale) ,text)))
- ;;urg -- extent is not from ps font, but we hope it's close
- (ly:make-stencil c (car b) (cdr b))))
-
(define-public (stencil-with-color stencil color)
(ly:make-stencil
(list 'color color (ly:stencil-expr stencil))
stencil)
))
-(define-public (dimension-arrows destination max-size)
- "Draw twosided arrow from here to @var{destination}"
-
+(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)
(cons (max 0 (car destination))
(max 0 (cdr destination)))))
- (result (ly:stencil-add arrow-2 arrow-1 line)))
+ (result
+ (ly:stencil-add
+ (if start? arrow-2 empty-stencil)
+ (if end? arrow-1 empty-stencil)
+ line)))
+ result)))
- result))
+(define-public dimension-arrows (arrow-stencil-maker #t #t))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ANNOTATIONS
(markup #:whiteout
#:simple (cond
((interval-empty? extent)
- (format "empty"))
+ "empty")
(is-length
(ly:format "~$" (interval-length extent)))
(else
(center-stencil-on-extent dim-stencil)
0.5))
(set! annotation
- (ly:make-stencil (list 'color color (ly:stencil-expr annotation))
- (ly:stencil-extent annotation X)
- (cons 10000 -10000)))))
+ (stencil-with-color annotation color))))
annotation))
-(define*-public (annotate-spacing-spec layout spacing-spec start-Y-offset prev-system-end
+;; 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 'space))
+ (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)))))
+ (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
- (annotate-y-interval layout
- "space"
- (cons (- start-Y-offset space) start-Y-offset)
- #t
- #:color (map (lambda (x) (* x 0.25)) base-color))
- (annotate-y-interval layout
- "min-dist"
- (cons (- start-Y-offset min-dist) start-Y-offset)
- #t
- #:color (map (lambda (x) (* x 0.5)) base-color))
- (ly:stencil-add
- (annotate-y-interval layout
- "bottom-of-extent"
- (cons prev-system-end start-Y-offset)
- #t
- #:color base-color)
- (annotate-y-interval layout
- "padding"
- (cons (- prev-system-end padding) prev-system-end)
- #t
- #:color contrast-color))))))
-
+ 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*
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!)
+ ;; 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"
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
+ ;; 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))))
projects / lilypond.git / blobdiff