https://bugzilla.wikimedia.org/show_bug.cgi?id=32694
Web browser: ---
Bug #: 32694
Summary: Use baseline shift when positioning inline math PNGs
Product: MediaWiki extensions
Version: any
Platform: All
URL: https://www.mediawiki.org/wiki/Requests_for_comment/Re
duce_math_rendering_preferences#Issues_5706
OS/Version: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Math (texvc)
AssignedTo: wikibugs-l@lists.wikimedia.org
ReportedBy: br...@wikimedia.org
Classification: Unclassified
This is a feature that blahtex has which is very nice, and was suggested from
<https://www.mediawiki.org/wiki/Requests_for_comment/Reduce_math_rendering_preferences>
as something that should help make 'always render' a more acceptable default.
dvipng has --height and --depth options which can be used to figure out where
the text baseline in the image is. This can then be used in inline CSS to
position the image relative to the actual text baseline, and should make things
match up inline more often.
This should not be terribly hard to adapt, though will require some tweaks:
* drop dvips support, use dvipng exclusively
* include the parameters when texvc calls dvipng -- OR -- move dvipng call to
PHP side
* capture the data and record it
* make use of it in rendering
Existing items should be invalidated so they won't conflict.
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