;;;;
;;;; source file of the GNU LilyPond music typesetter
;;;;
-;;;; (c) 2003--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;; (c) 2003--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+(define-public (translate-stencil stencil coordinate-pair)
+ "Translate @code{stencil} by the distances specified in
+@code{coordinate-pair}."
+ (ly:stencil-translate-axis
+ (ly:stencil-translate-axis stencil (cdr coordinate-pair) Y)
+ (car coordinate-pair) X))
(define-public (stack-stencils axis dir padding stils)
"Stack stencils STILS in direction AXIS, DIR, using PADDING."
(ly:stencil-combine-at-edge stil (other-axis axis) -1 rb padding))
stil))
+(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-round-filled-box-stencil xext yext blot-diameter)
+ "Make a filled rounded box."
+
+ (ly:make-stencil
+ (list 'round-filled-box (- (car xext)) (cdr xext)
+ (- (car yext)) (cdr yext) blot-diameter)
+ xext yext))
+
(define-public (make-filled-box-stencil xext yext)
"Make a filled box."
(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 (- radius) radius)
- (cons (- radius) radius)))
+ (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 radius @var{x-radius},
+ y 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 'oval x-radius y-radius thickness fill)
+ (cons (- x-out-radius) x-out-radius)
+ (cons (- y-out-radius) y-out-radius))))
+
+(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}."
+ (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
"
(let* ((xext (ly:grob-extent grob grob 0))
(yext (ly:grob-extent grob grob 1))
- (thick 0.1))
-
+ (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)))
(define-public (circle-stencil stencil thickness padding)
"Add a circle around STENCIL, producing a new stencil."
- (let* ((x-ext (ly:stencil-extent stencil 0))
- (y-ext (ly:stencil-extent stencil 1))
- (diameter (max (- (cdr x-ext) (car x-ext))
- (- (cdr y-ext) (car y-ext))))
+ (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)))
(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 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 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 (fontify-text font-metric text)
"Set TEXT with font FONT-METRIC, returning a stencil."
projects / lilypond.git / blobdiff