Re: [Lilypond-auto] Issue 2658 in lilypond: wrong stem rendering (inconsistent thickness)

[lilypond]

Comment #104 on issue 2658 by address@hidden: wrong stem rendering  
(inconsistent thickness)
http://code.google.com/p/lilypond/issues/detail?id=2658

> What about actually changing the stems from rounded rectangles to lines?

Janek, you can easily try that, and didn't we try that a few months ago?

I asked someone with the affected PDF previewer to try replacing  
round-filled-box in output-ps.scm with something that draws a single line  
for boxes where the lines along the sides overlap.  You don't need to  
recompile to try this.
Maybe I should have put in a fudge factor, since stems are near-exactly two  
linewidths thick, by default.

(define (round-filled-box left right bottom top blotdiam)
  (let* ((halfblot (/ blotdiam 2))
         (y (- halfblot bottom))
         (height (- top (+ halfblot y)))
         ;; If the lines along the sides of the box (nearly) overlap
         ;;  then use one line of the width of the box
         (linewidth (if (>= (* 2.2 blotdiam) ;; fudge 2 to 2.2
                            (+ left right))
                      (+ left right)
                      blotdiam))
         (halfwidth (/ linewidth 2))
         (x (- halfwidth left))
         (width (- right (+ halfwidth x))))
    (ly:format  "~4l draw_round_box"
                (list width height x y linewidth))))


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