[Interest] Qt5/OMAP4/EGLFS: Strange animation behaviour
stylon at gmx.de
Mon Nov 19 22:43:12 CET 2012
as promised some feedback on this matter...
On 11/16/2012 07:37 AM, Stephan Kanthak wrote:
>> Are you doing "export QML_FORCE_THREADED_RENDERER=1"? Because afaik
>> without that you won't get the threaded renderer. Most issues I've seen
>> with animations have been due to not using the threaded renderer.
Just "export QML_FORCE_THREADED_RENDERER=1" subjectively works best for
me so far. I still do see tearing all over, so there's definitely no
waiting for VSYNC, either in Qt5/EGLFS or the TI driver, but animations
>> You might also want to try the customcontext renderer from
>> After building and doing make install there you should be able to use it
>> by doing "export QMLSCENE_DEVICE=customcontext" or running with
I tried this code, too, although I had some problems adding Animators
objects at the right spot in my QML files. It finally seems to work for
me once Animations + animated objects are both from Animators. However,
the result is not much better than with just "export
QML_FORCE_THREADED_RENDERER=1". Tearing is even more obvious as the
buffer swapping then seems to happen right in the middle of an animated
texture covering the lower 50% of the display.
>> If it's a timing issue you might also try
After setting this, animations are a bit quicker, but smoothness also
wasn't better than with just "export QML_FORCE_THREADED_RENDERER=1".
So, overall my remaining problem seems to be that buffers are not
swapped with VSYNC. Any idea wether this is due to Qt5/EGLFS or rather
the TI driver?
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