On Mon, May 19, 2014 at 2:48 PM, Teo Mrnjavac <t...@kde.org> wrote: > On Monday, May 19, 2014 14:40:59 David Edmundson wrote: >> Read this before doing anything: >> http://blog.qt.digia.com/blog/2013/04/25/retina-display-support-for-mac-os-i >> os-and-x11/ >> >> There are branches being merged in for 5.4. They affect QWidgets too. >> >> Everything is based around a devicePixelRatio. >> As I understand it, you write code as though you have pixels on a >> normal 96dpi screen; but then there's a scaling factor for high DPI >> skills which converts to screen pixels. >> >> This can be overridden by an env variable. >> >> It's always better to work closer with upstream than to roll your own thing. >> _______________________________________________ >> Plasma-devel mailing list >> Plasma-devel@kde.org >> https://mail.kde.org/mailman/listinfo/plasma-devel > > Working with upstream would of course be best. Could you please point me to > those branches? The blog post you linked is quite old now. > It still won't be easy to compute a good scaling ratio, but heuristics in Qt > or a QPA > our own thing. > For most platforms it's merged together See http://qt-project.org/doc/qt-5/qwindow.html#devicePixelRatio
and the base class for the QPA. qtbase/src/gui/kernel/qplatformscreen.cpp devicePixelRatio It seems the X Platform backend doesn't implement it yet. Probably for the reasons you've talked about already. I don't know where any patches on that are. I could search for it, but you can Google as well as me. David _______________________________________________ Plasma-devel mailing list Plasma-devel@kde.org https://mail.kde.org/mailman/listinfo/plasma-devel
