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[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] Re: Ticket 377


From: Auto mailings of changes to Lily Issues via Testlilyissues-auto
Subject: [Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] Re: Ticket 3778 discussion
Date: Wed, 29 Apr 2020 08:15:05 -0000

This is due to the regression test, which uses the SVG backend. It looks like there isn't currently a way to do regression tests on the SVG backend (there is only one other regression test that does, and it was disabled in 2008). I will remove the regression test.


[issues:#3778] SVG backend: Use bounding box as skylines for markup

Status: Started
Created: Sun Jan 05, 2014 05:39 AM UTC by Anonymous
Last Updated: Wed Apr 29, 2020 07:55 AM UTC
Owner: Kevin Barry
Attachments:

https://codereview.appspot.com/582010043

Use bounding box as skylines for markup in svg backend

As there is no routine for determining skylines for utf-8-string
stencils, they normally fall back to the grob's bounding box, which is
fine. However, when there is a mixture of utf-8-string and other types
of stencil (which have associated skyline functions) in a single grob,
the entire grob gets a skyline determined only from the non-utf-8-string
stencils. This sometimes causes the text portion of such mixed grobs
(e.g. metronome marks) to collide with other grobs.

While looping over the stencils, check for utf-8-string and if found,
clear the skylines and break out of the loop. Empty skylines forces a
fallback to the grob's bounding box, which restores the behaviour from
before the patch to improve skyline approximations (issue 2148). This
does not fix the issue that there is no routine for determining skylines
for utf-8-strings when the backend is svg, but it does at least remove
the collisions without changing the behaviour in non-broken situations.

Add a suitable (svg backend) regression test.


Originally reported here.

the tempo marking in the SVG output is both lower, so that it collides with the stem of the A, and also has insufficient space between the equals sign and the preceding quarter note:

\version "2.18.0"

\relative c'' {
  \tempo 4=76
  a4
}

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