Last modified: 2013-05-17 17:23:58 UTC
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.
Keywords spam: High-density HiDPI Retina toolbar icons don't display if window opened on low-res screen, then moved to high-res.
Mark as enhancement; this is nothing like a priority ahead of December. :-)
This is now invalid, as we actually provide the SVGs by default to every browser that doesn't fail on them (yay).
