https://bugzilla.wikimedia.org/show_bug.cgi?id=40140
Web browser: ---
Bug #: 40140
Summary: High-density (HiDPI/Retina) toolbar icons don't
display if window opened on low-res screen, then moved
to high-res
Product: VisualEditor
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: User Interface
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected],
[email protected]
Classification: Unclassified
Mobile Platform: ---
Broken out from bug 37849: window.devicePixelRatio is checked when loading
stuff, and then either a stylesheet for 1.0x PNGs or one using scalable SVGs
gets loaded depending on the ratio.
This leads to being stuck with the 1.0x PNGs if you started editing on a
low-resolution screen, then moved the window (or detached an external monitor)
and moved it to a high-resolution screen.
Per bug 37849 comment 9 there are probably two ways to fix this:
1) Detect resolution changes (window.onresize?) and switch the stylesheet based
on the updated window.devicePixelRatio
or
2) Always use SVG icon set if SVG is supported in the browser.
Note that Firefox doesn't yet support window.devicePixelRatio, but it's about
to come in in nightlies, before actual HiDPI support for Mac OS X :) --
https://bugzilla.mozilla.org/show_bug.cgi?id=564815
IE 10 doesn't support window.devicePixelRatio at all, which is a bit annoying
although it does support SVG and high-resolution screens eg on Windows 8. We
can leave that as a corner case for the moment, though use of SVG at all
resolutions would conveniently work around it.
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