https://bugzilla.wikimedia.org/show_bug.cgi?id=68922
Bug ID: 68922
Summary: Many non-latin fonts don't cover the latin character
set
Product: MediaWiki extensions
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Collection
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Web browser: ---
Mobile Platform: ---
The XeLaTeX backend for the new OCG PDF renderer does not fallback if the font
selected for a given language does not contain a given codepoint. For many
possible fonts for a given language, the latin code pages are not included.
This makes page numbers, dates, citation numbers, and even bullets in lists
render as tofu (blank square boxes).
The latex renderer should keep track of which code pages are present in a font,
and add explicit font-switch commands to the output when needed. (Including
redefining the command used for bullets in lists to ensure it is rendered in a
latin font.)
Ideally we could automatically generate coverage tables from a font. But at
*least* we should treat the Latin codepoints as a special case, and fall back
to the default latin font when latin codepoints are used in a font without
latin codepage coverage.
(This has been an issue for Russian, Indic languages, the google noto fonts,
etc, and accounts for most of the present difficultly in choosing an
appropriate font for a particular wiki language.)
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