High DPI issues

[Teo Mrnjavac]

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.
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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.

Cheers,
-- 
Teo Mrnjavac
http://teom.org | teo at kde.org