ZMOG test wiki (master branch)
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2022-12-15T02:41:33Z
Johnno
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This is a MediaWiki instance running 1.39 LTS, mainly for testing the [https://www.mediawiki.org/wiki/Extension:Score Score extension] and anything else I might be working on.
Using the excellent skin from the [https://starcitizen.tools/ Star Citizen] wiki.
== Score Extension ==
'''''See also:''''' ''for more SVG music output testing, see testing pages: [[score examples]], [[Tim paste]].''
Using a patched version of the Score extension to render music as SVG; see [https://phabricator.wikimedia.org/T49578 T49578] and the [https://gitlab.com/doctorlard/mediawiki-extension-score/-/merge_requests/2/diffs patch] mirrored on GitLab. LilyPond version [https://gitlab.com/lilypond/lilypond/-/releases/v2.23.82 2.23.82] (a release candidate for the 2.24 release, scheduled for December 2022) includes libcairo support for producing SVG and PNG directly, rather than via PS, GhostScript, and ImageMagick.
;Note: To yoink Lilypond snippets from Wikipedia articles, see [https://en.wikipedia.org/wiki/Special:PagesWithProp?propname=score&namespace=0 Special:PagesWithProp] and search for the "score" property in Article space.
Here's a Wagner excerpt for [https://en.wikipedia.org/wiki/Contrabass_trombone contrabass trombone], from Wikipedia.
First, the score block looks like this:
<syntaxhighlight lang="Tex">
<score lang="lilypond">
\layout { ragged-right = ##t \context { \Score \omit BarNumber } }
\relative g {
\override DynamicTextSpanner.style = #'none
\override Hairpin.minimum-length = #5
\clef bass \key c \major
g2~ \ff g8 f8 e8. d16
c4 b a g f e d c4 \break
b a g f e1~ \dim\! << e1~ { s2 s4 s4 \> } >> e4 \! \p r4 r2
}
</score>
</syntaxhighlight>
Which normally generates a PNG image:
[[File:Score.png|none|Standard PNG output, using PostScript from Lilypond 2.22 --ps rendered by GhostScript|class=mw-ext-score]]
The patch produces good SVG output:
<score lang="lilypond">
\layout { ragged-right = ##t \context { \Score \omit BarNumber } }
\relative g {
\override DynamicTextSpanner.style = #'none
\override Hairpin.minimum-length = #5
\clef bass \key c \major
g2~ \ff g8 f8 e8. d16
c4 b a g f e d c4 \break
b a g f e1~ \dim\! << e1~ { s2 s4 s4 \> } >> e4 \! \p r4 r2
}
</score>
With a PNG fall-back generated using Lilypond's built-in libcairo support. As you can see, it almost identical; I think it is slightly clearer and more fine-grained than the GhostScript output:
[[File:nku68xzt.png|none|New PNG output, directly using Lilypond 2.24 directly with --png and libcairo|class=mw-ext-score]]
Cropping is done with the new LilyPond ''-dno-use-paper-size-for-page'' option ([https://lilypond.org/doc/v2.23/Documentation/usage/command_002dline-usage#advanced-command-line-options-for-lilypond docs]), which precludes having to do it the old way with an extra ImageMagick ''convert'' shell command, and achieves the same result.
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