[Digikam-devel] [digikam] [Bug 337231] use high resolution pixmaps on retina displays [patch]

[Axel]

https://bugs.kde.org/show_bug.cgi?id=337231

--- Comment #28 from Axel <arnolda747 at gmail.com> ---
Yes, indeed, see
http://blog.qt.digia.com/blog/2013/04/25/retina-display-support-for-mac-os-ios-and-x11/
. Basically, MacOSX reports only have of the physical resolution on retina
displays, so that applications that were not build for high resolution screens
work. At the same time, the system's renderer accepts higher resolution bitmaps
and draws them at full resolution.

There is something to that approach, since e.g. Chrome under Linux is hardly
usable on a HiDPI monitor, as the menu font pixel sizes are fixed. Most KDE
applications work fairly well, but even there I encounter pixel-based layout
from time to time. Often, menus are too small to display all text, and so on.

The problem is that you are depending on the backend scaling. Apple's
implementation does a pretty good job, but it seems some Linux backends don't.

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