[Development] OpenGL drivers

Ziller Eike Eike.Ziller at digia.com
Mon Dec 2 12:11:12 CET 2013

On Nov 30, 2013, at 10:29 PM, Mark Gaiser <markg85 at gmail.com> wrote:

> On Fri, Nov 29, 2013 at 7:01 PM, Thiago Macieira
> <thiago.macieira at intel.com> wrote:
>> On sexta-feira, 29 de novembro de 2013 12:27:44, Sletta Gunnar wrote:
>>> So, I'm asking that if you encounter issues with flickering, crashes, bad
>>> rendering and similar, help us track which things are problematic by filing
>>> a bugreport on bugreports.qt-project.org and use the label "driverissue" in
>>> the task. Please  include OS, windowing system, graphics hardware and
>>> driver version. And since most of the workarounds have been applied to Qt
>>> 5.2, do test against the 5.2 RC1 or later.
>> Do you consider fonts looking the wrong size to be bad rendering and a driver
>> issue? Fonts in the Creator welcome screen look to be of a different size than
>> the rest of Creator.
>> I'd consider it a font issue only, not a driver issue.
> What you refer to are probably the fonts rendered through QML. By
> default QML renders fonts with the "distance field" stuff [1]. It
> looks awesome on mobile, but looks horrible on the desktop. This has
> been known for a while [2] but apparently there is no effort ongoing
> to improve the situation for the desktop users.
> Globally setting the "QML_DISABLE_DISTANCEFIELD" variable makes it use
> the native font system again and makes it look nice:)

We are already using native text rendering in Qt Creator’s welcome screen, so that won’t change anything for it.

Br, Eike

> [1] http://blog.qt.digia.com/blog/2011/07/15/text-rendering-in-the-qml-scene-graph/
> [2] https://bugreports.qt-project.org/browse/QTBUG-28993
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Eike Ziller, Senior Software Engineer - Digia, Qt
Digia Germany GmbH, Rudower Chaussee 13, D-12489 Berlin
Geschäftsführer: Mika Pälsi, Juha Varelius, Tuula Haataja
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