[Development] [Interest] Qt 5 worries - A plea for software rendering fallbacks

lars.knoll at nokia.com lars.knoll at nokia.com
Thu Oct 27 12:22:45 CEST 2011

On 10/27/11 11:48 AM, "ext Frans Klaver" <fransklaver at gmail.com> wrote:

>On Thu, Oct 27, 2011 at 11:37 AM, Schimkowitsch Robert
><Robert.Schimkowitsch at andritz.com> wrote:
>> I see there's no Qt5-Feedback list up and running, so I'll post here in
>> meantime.
>AFAIK all qt5 feedback can go onto the development mailing list now.
>It's probably best to continue the discussion there.

Yes. development at qt-project.org is the place for these discussions and is
(so far) completely about Qt 5 :)
>> I have really big issues with the "OpenGL ES" decision. I have
>>developed a
>> 2D-graphic engine for Windows (kinda similar to GraphicsView in its
>> abilities), based on OpenGL.
>> Over the years, I had tons of trouble with
>> -) Memory or resource leaks in graphic card drivers
>> -) Crashes when using Remote Desktop
>> -) Drivers only working in single monitor mode
>> -) Issues where the graphic output would look different on a certain
>> card (an absolute no-go for a technical application that people depend
>> After battling those issues for several years, I had to drop back to the
>> Microsoft OpenGL 1.1 software driver. Fortunately, it is  quite fast
>> for what I need. It does have it's flaws, but at least I know them and
>> work around them.
>> Please, take it from someone who has been trough the fires: Provide a
>> software rendering fallback, at least for QWidget and
>> applications!

To repeat it once again: QWidgets (and that includes QGraphicsView) do NOT
require any OpenGL in Qt 5.


>> Allow the developer to choose this fallback!
>> It makes all the difference between testing the resulting application
>> or on every graphic card with every driver version a customer might use.
>> Which is obviously impossible.
>> Kind regards
>> Robert Schimkowitsch
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