-@var{size}. Orientation is given by @var{orientation}."
- (let* ((fret-count (+ (- (cadr fret-range) (car fret-range)) 1))
- (fret-length (* (- string-count 1) size))
- (half-thickness (* th 0.5))
- (base-fret (car fret-range))
- (fret-zero (draw-fret-line string-count th size orientation)))
- (if (eq? orientation 'normal)
- (ly:stencil-combine-at-edge
- (draw-fret-lines fret-count string-count th size orientation)
- Y UP
- fret-zero
- (- size th))
- (ly:stencil-combine-at-edge
- fret-zero X RIGHT
- (draw-fret-lines fret-count string-count th size orientation)
- (- size th)))))
-
-(define (draw-dots layout props string-count fret-count
- size finger-code
- dot-position dot-radius dot-thickness dot-list orientation)
- "Make dots for fret diagram."
-
- (let* ((details (chain-assoc-get 'fret-diagram-details props '()))
- (scale-dot-radius (* size dot-radius))
- (scale-dot-thick (* size dot-thickness))
- (dot-color (assoc-get 'dot-color details 'black))
- (finger-xoffset -0.25)
- (finger-yoffset (* -0.5 size ))
- (dot-label-font-mag
- (* scale-dot-radius (assoc-get 'dot-label-font-mag details 1.0)))
- (string-label-font-mag
- (* size (assoc-get 'string-label-font-mag details 0.6)))
- (mypair (car dot-list))
- (restlist (cdr dot-list))
- (string (car mypair))
- (fret (cadr mypair))
- (xpos (* size (if (eq? orientation 'normal)
- (- string-count string)
- (+ (- fret 1 ) dot-position))))
- (ypos (* size (if (eq? orientation 'normal)
- (+ 2 (- fret-count fret dot-position ))
- (- string-count string))))
- (extent (cons (- scale-dot-radius) scale-dot-radius))
- (finger (caddr mypair))
- (finger (if (number? finger) (number->string finger) finger))
- (dotstencil (if (eq? dot-color 'white)
- (ly:stencil-add
- (make-circle-stencil
- scale-dot-radius scale-dot-thick #t)
- (ly:stencil-in-color
- (make-circle-stencil
- (- scale-dot-radius (* 0.5 scale-dot-thick))
- 0 #t)
- 1 1 1))
- (make-circle-stencil
- scale-dot-radius scale-dot-thick #t)))
- (positioned-dot (begin
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis dotstencil xpos X)
- ypos Y)))
- (labeled-dot-stencil
- (if (or (eq? finger '())(eq? finger-code 'none))
- positioned-dot
- (if (eq? finger-code 'in-dot)
- (let* ((finger-label
- (centered-stencil
- (sans-serif-stencil
- layout props dot-label-font-mag finger))))
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (ly:stencil-add
- dotstencil
- (if (eq? dot-color 'white)
- finger-label
- (ly:stencil-in-color finger-label 1 1 1)))
- xpos X)
- ypos Y))
- (if (eq? finger-code 'below-string)
- (ly:stencil-add
- positioned-dot
- (if (eq? orientation 'normal)
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (centered-stencil
- (sans-serif-stencil
- layout props string-label-font-mag finger))
- xpos X)
- (* size finger-yoffset) Y)
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (centered-stencil
- (sans-serif-stencil
- layout props string-label-font-mag finger))
- (* size (+ 2 fret-count finger-yoffset)) X)
- ypos Y)))
- ;unknown finger-code
- positioned-dot)))))
- (if (null? restlist)
- labeled-dot-stencil
- (ly:stencil-add
- (draw-dots
- layout props string-count fret-count size finger-code
- dot-position dot-radius dot-thickness restlist orientation)
- labeled-dot-stencil))))
-
-(define (draw-xo layout props string-count fret-range size xo-list orientation)
- "Put open and mute string indications on diagram, as contained in
+@var{size}. Orientation is given by @var{orientation}."
+ (define (helper x)
+ (if (null? (cdr x))
+ (fret-stencil (car x))
+ (ly:stencil-add
+ (fret-stencil (car x))
+ (helper (cdr x)))))
+
+ (let ((fret-list (iota (1+ my-fret-count))))
+ (helper fret-list)))
+
+ (define (fret-stencil fret)
+ "Make a stencil for @code{fret}, given the
+fret-diagram overall parameters."
+ (let* ((low-string-half-thickness
+ (* 0.5
+ size
+ th
+ (string-thickness string-count thickness-factor)))
+ (fret-half-thickness (* 0.5 size th))
+ (start-coordinates
+ (stencil-coordinates
+ (* size fret)
+ (- fret-half-thickness low-string-half-thickness)))
+ (end-coordinates
+ (stencil-coordinates
+ (* size fret)
+ (* size (1- string-count)))))
+ (make-line-stencil
+ (* size th)
+ (car start-coordinates) (cdr start-coordinates)
+ (car end-coordinates) (cdr end-coordinates))))
+
+ (define (draw-barre barre-list)
+ "Create barre indications for a fret diagram"
+ (if (not (null? barre-list))
+ (let* ((string1 (caar barre-list))
+ (string2 (cadar barre-list))
+ (barre-fret (caddar barre-list))
+ (top-fret (cdr fret-range))
+ (low-fret (car fret-range))
+ (fret (1+ (- barre-fret low-fret)))
+ (barre-vertical-offset 0.5)
+ (dot-center-fret-coordinate (+ (1- fret) dot-position))
+ (barre-fret-coordinate
+ (+ dot-center-fret-coordinate
+ (* (- barre-vertical-offset 0.5) dot-radius)))
+ (barre-start-string-coordinate (- string-count string1))
+ (barre-end-string-coordinate (- string-count string2))
+ (scale-dot-radius (* size dot-radius))
+ (barre-type (assoc-get 'barre-type details 'curved))
+ (barre-stencil
+ (cond
+ ((eq? barre-type 'straight)
+ (make-straight-barre-stencil
+ barre-fret-coordinate
+ barre-start-string-coordinate
+ barre-end-string-coordinate
+ scale-dot-radius))
+ ((eq? barre-type 'curved)
+ (make-curved-barre-stencil
+ barre-fret-coordinate
+ barre-start-string-coordinate
+ barre-end-string-coordinate
+ scale-dot-radius)))))
+ (if (not (null? (cdr barre-list)))
+ (ly:stencil-add
+ barre-stencil
+ (draw-barre (cdr barre-list)))
+ barre-stencil ))))
+
+ (define (make-straight-barre-stencil
+ fret-coordinate
+ start-string-coordinate
+ end-string-coordinate
+ half-thickness)
+ "Create a straight barre stencil."
+ (let ((start-point
+ (stencil-coordinates
+ (* size fret-coordinate)
+ (* size start-string-coordinate)))
+ (end-point
+ (stencil-coordinates
+ (* size fret-coordinate)
+ (* size end-string-coordinate))))
+ (make-line-stencil
+ half-thickness
+ (car start-point)
+ (cdr start-point)
+ (car end-point)
+ (cdr end-point))))
+
+ (define (make-curved-barre-stencil
+ fret-coordinate
+ start-string-coordinate
+ end-string-coordinate
+ half-thickness)
+ "Create a curved barre stencil."
+ (let* ((bezier-thick 0.1)
+ (bezier-height 0.5)
+ (bezier-list
+ (make-bezier-sandwich-list
+ (* size start-string-coordinate)
+ (* size end-string-coordinate)
+ (* size fret-coordinate)
+ (* size bezier-height)
+ (* size bezier-thick)))
+ (box-lower-left
+ (stencil-coordinates
+ (+ (* size fret-coordinate) half-thickness)
+ (- (* size start-string-coordinate) half-thickness)))
+ (box-upper-right
+ (stencil-coordinates
+ (- (* size fret-coordinate)
+ (* size bezier-height)
+ half-thickness)
+ (+ (* size end-string-coordinate) half-thickness)))
+ (x-extent (cons (car box-lower-left) (car box-upper-right)))
+ (y-extent (cons (cdr box-lower-left) (cdr box-upper-right))))
+ (make-bezier-sandwich-stencil
+ bezier-list
+ (* size bezier-thick)
+ x-extent
+ y-extent)))
+
+ (define (draw-dots dot-list)
+ "Make dots for fret diagram."
+
+ (let* ( (scale-dot-radius (* size dot-radius))
+ (scale-dot-thick (* size th))
+ (default-dot-color (assoc-get 'dot-color details 'black))
+ (finger-label-padding 0.3)
+ (dot-label-font-mag
+ (* scale-dot-radius
+ (assoc-get 'dot-label-font-mag details 1.0)))
+ (string-label-font-mag
+ (* size
+ (assoc-get
+ 'string-label-font-mag details
+ (cond ((or (eq? orientation 'landscape)
+ (eq? orientation 'opposing-landscape))
+ 0.5)
+ (else 0.6)))))
+ (mypair (car dot-list))
+ (restlist (cdr dot-list))
+ (string (car mypair))
+ (fret (cadr mypair))
+ (fret-coordinate (* size (+ (1- fret) dot-position)))
+ (string-coordinate (* size (- string-count string)))
+ (dot-coordinates
+ (stencil-coordinates fret-coordinate string-coordinate))
+ (extent (cons (- scale-dot-radius) scale-dot-radius))
+ (finger (caddr mypair))
+ (finger (if (number? finger) (number->string finger) finger))
+ (inverted-color (eq? 'inverted (cadddr mypair)))
+ (dot-color (if (or (and (eq? default-dot-color 'black) inverted-color)
+ (and (eq? default-dot-color 'white) (not inverted-color)))
+ 'white
+ 'black))
+ (dot-stencil (if (eq? dot-color 'white)
+ (ly:stencil-add
+ (make-circle-stencil
+ scale-dot-radius scale-dot-thick #t)
+ (ly:stencil-in-color
+ (make-circle-stencil
+ (- scale-dot-radius (* 0.5 scale-dot-thick))
+ 0 #t)
+ 1 1 1))
+ (make-circle-stencil
+ scale-dot-radius scale-dot-thick #t)))
+ (positioned-dot
+ (ly:stencil-translate dot-stencil dot-coordinates))
+ (labeled-dot-stencil
+ (cond
+ ((or (eq? finger '())(eq? finger-code 'none))
+ positioned-dot)
+ ((eq? finger-code 'in-dot)
+ (let ((finger-label
+ (centered-stencil
+ (sans-serif-stencil
+ layout props dot-label-font-mag finger))))
+ (ly:stencil-translate
+ (ly:stencil-add
+ dot-stencil
+ (if (eq? dot-color 'white)
+ finger-label
+ (ly:stencil-in-color finger-label 1 1 1)))
+ dot-coordinates)))
+ ((eq? finger-code 'below-string)
+ (let* ((label-stencil
+ (centered-stencil
+ (sans-serif-stencil
+ layout props string-label-font-mag
+ finger)))
+ (label-fret-offset
+ (stencil-fretboard-offset
+ label-stencil 'fret orientation))
+ (label-fret-coordinate
+ (+ (* size
+ (+ 1 my-fret-count finger-label-padding))
+ label-fret-offset))
+ (label-string-coordinate string-coordinate)
+ (label-translation
+ (stencil-coordinates
+ label-fret-coordinate
+ label-string-coordinate)))
+ (ly:stencil-add
+ positioned-dot
+ (ly:stencil-translate
+ label-stencil
+ label-translation))))
+ (else ;unknown finger-code
+ positioned-dot))))
+ (if (null? restlist)
+ labeled-dot-stencil
+ (ly:stencil-add
+ (draw-dots restlist)
+ labeled-dot-stencil))))
+
+ (define (draw-thick-zero-fret)
+ "Draw a thick zeroth fret for a fret diagram whose base fret is 1."
+ (let* ((half-lowest-string-thickness
+ (* 0.5 th (string-thickness string-count thickness-factor)))
+ (half-thick (* 0.5 sth))
+ (top-fret-thick
+ (* sth (assoc-get 'top-fret-thickness details 3.0)))
+ (start-string-coordinate (- half-lowest-string-thickness))
+ (end-string-coordinate (+ (* size (1- string-count)) half-thick))
+ (start-fret-coordinate half-thick)
+ (end-fret-coordinate (- half-thick top-fret-thick))
+ (lower-left
+ (stencil-coordinates
+ start-fret-coordinate start-string-coordinate))
+ (upper-right
+ (stencil-coordinates
+ end-fret-coordinate end-string-coordinate)))
+ (ly:round-filled-box
+ ;; Put limits in order, or else the intervals are considered empty
+ (ordered-cons (car lower-left) (car upper-right))
+ (ordered-cons (cdr lower-left) (cdr upper-right))
+ sth)))
+
+ (define (draw-xo xo-list)
+ "Put open and mute string indications on diagram, as contained in