Hi Paolo,
But the alpha channel is ignored...
Is there a way to fix this?
AFAIK LilyPond cannot deal with alpha transparency at all. The
impression of transparency is only achieved by placing the boxes in a
layer behind the staff.
I therefore replaced (see the attached file):
(if filled
(ly:make-stencil (list 'color fill-color
(list 'round-filled-box
(- (- (car xext) thick)) (+ (cdr xext)
thick)
(- (car yext)) (cdr yext)
0.0)
xext yext))
empty-stencil)
with:
(if filled
(stencil-with-color
(ly:round-filled-box xext yext 0)
fill-color)
empty-stencil)
At least, "xext" should be widened by "thick":
%%%%%%
(if filled
(stencil-with-color
(ly:round-filled-box (cons (- (car xext) thick) (+ (cdr
xext) thick)) yext 0)
fill-color)
empty-stencil)
%%%%%%
This fixes the boundaries of boxes separated by a line break, see bar 8
in the example.
Cheers,
Klaus
