[Development] Fonts in QtWidgets and QtQuick

Tor Arne Vestbø Tor.arne.Vestbo at qt.io
Sun Nov 25 23:45:47 CET 2018

Have you set renderType to Text.NativeRendering ?

Tor Arne 

> On 25 Nov 2018, at 22:46, Alberto Mardegan <mardy at users.sourceforge.net> wrote:
> Hi all!
>  I'm working on a desktop style for the QtQuick Controls 2 API [1], and
> as I'm trying to achieve a pixel-by-pixel equivalence with QtWidgets,
> I'm writing unit tests which graphically compare the output generated by
> my controls versus that generated by QtWidgets.
> I'm getting some issues with the fonts, for example in the buttons'
> label: they just don't match, despite the fact that the QFont set on the
> QPainter is exactly the same. For some reason, the lower levels of the
> graphical stack (FontConfig, I presume) select a different font in
> QtQuick, compared to the one used in QtWidgets.
> The issue seems to go away if I run the tests under xvfb and specify a
> different configuration file for FontConfig [2]. While this does the
> trick, I'm left wondering whether (and where) QtWidgets somehow
> initializes FontConfig differently from QtQuick. I guess I could get rid
> of some hacks and truly achieve a pixel perfect replacement if I found
> the way to replicate QtWidgets' font configuration in my QtQuick module.
> Any ideas?
> Ciao,
>  Alberto
> [1]: https://gitlab.com/mardy/qqc2-desktop
> [2]:
> https://gitlab.com/mardy/qqc2-desktop/commit/caba6e67ce745d0653a10ccf8d801ad799129668
> -- 
> http://blog.mardy.it - Geek in un lingua international
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