[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] Re: #5346 Fix

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[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] Re: #5346 Fix GC issue in skyline rotations

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Sat, 16 Jun 2018 21:00:53 -0000

No problem with "fuming off", but what bothers me a bit is that these positioning differences actually do not show up in the standard regtests. I didn't expect that at all.

But when using the png comparison regtests (make-regtest-png.sh), the differences will become visible - even the slight shift in the much older stencil-color-rotation.
Please find a PNG file containing all six (old, new, diff) as an attachment.

[issues:#5346] Fix GC issue in skyline rotations

Status: Started
Created: Fri Jun 15, 2018 03:32 PM UTC by David Kastrup
Last Updated: Sat Jun 16, 2018 12:27 PM UTC
Owner: David Kastrup

Fix GC issue in skyline rotations

This was issue 5341 initially and is a fix for a problem introduced
during issue 5319. The problem basically is that a rotated Stencil is
created and its stencil _expression_ is getting stored on the heap
without retaining any pointer to it in areas scanned during garbage
collections.

This fix is a minimal one that merely avoids creating a stencil and
instead simulates the effect on the transform matrix to be expected
from using a rotated stencil.

http://codereview.appspot.com/344960043

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