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

[lilypond]

Comment #88 on issue 2658 by address@hidden: wrong stem rendering  
(inconsistent thickness)
http://code.google.com/p/lilypond/issues/detail?id=2658

I've exchanged the arc operators (which don't have an exact representation  
in PDF) with the "standard" one-bezier quartercircle approximation where  
the points and control points are
   (0,r)..controls (4/3 r*(sqrt 2 - 1),r) and (r, 4/3 r *(sqrt 2 - 1)) ..  
(r,0)
and, compared to the previous version, this changes the size of the PDF  
from a stem-intensive file with about 700kB of file size (as opposed to  
about 90kB previously) approximately 10 bytes.

I am not bothering to check that one in.  I think I'll try one additional  
approach using a circular pen just to stroke top and bottom of a pen  
horizontally, then strike down with a vertical line.  I'll do the whole  
thing without stroke adjustment: if strokeadjustment is _on_, I am assuming  
direct bitmap output and valid one-per-pixel device space coordinates and  
doing my own version of strokeadjustment on the whole stem construct  
including the rounded ends.  In either case, a stem will be one top and  
bottom horizontal stroke with rounded ends and one vertical stroke with  
flat ends.  This should keep the file size down and the stem width  
consistent, at the cost of some fattening of the ends in cairo-based  
previewers.  And of course, I can make the direct bitmap output pretty good.

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