have you tried QOpenGlWidget ?
otherwise you dont have other options: plain QWidget's does not HW
accelerated
or, you can extend QtCharts to be more QtQuicker and more featured.
everyone will be happy :)
On 8/29/18 11:39 AM, Denis Shienkov wrote:
Hi all.
I have an Apalis iMX6 board with the Yocto's image with the working
'eglfs' and 'linuxfb' backends (without of X11 support).
I need to create a 'pure' QtWidgets application, where I need to use a
real-time plotting with the Qwt library (using the Qt Quick is not an
option, as there the QtCharts is not ready for usage) .
But, I'm sadly surprised that a 2D painting takes ~100% CPU loading as
with the 'eglfs' and as with 'linuxfb' backends. It is not an
acceptable, because, e.g. on Desktop Linux/Windows it takes ~4-5% CPU
loading.
Is any workarounds for this? Maybe I need to re-build the Yocto's
image to enable the X11 'xcb' support?
BR,
Denis
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