[Interest] Qt5 and (lack of!) font rendering quality (Linux/X11)

[René J.V. Bertin]

On Tuesday October 21 2014 10:37:20 Allan Sandfeld Jensen wrote:

> We can also synthesis non-default stretch.

Any affine transformation should be possible ...

> In Qt 5.4 the font system has been improved to also read autohint and 
> lcdfilter settings from fontconfig which we were lacking, and read more 
> settings from XSettings. I was under the impression that those that reported 

That sounds promising.

> wrong font rendering in Qt 5 were non-KDE users, and the issue was Qt picking 
> up non-KDE font settings.

As an aside: the problem with Qt5 (< 5.4 in any case) is that there's no longer a way to specify global defaults, as it used to be possible with QtConfig.


> I would recommend trying a Qt 5.3.2 package again. Or apply this patch to your 

AFAIK Kubuntu has 5.3.2 in Project Neon 5. I'll see if I can find a moment while still on my current trip to fetch the source and see what patches it has, but building anything as huge as Qt5 will have to wait until I get home ...

> Qt: https://codereview.qt-project.org/#/c/92167 . This is what fixes selecting 
> fonts based on stylename which is easier than using weight, and happens to be 
> how the font-selector widget does it, which made it broken before.

Hmmm, is that also how Qt4/OS X determines what font file to load for a given font, by any chance?

René