[Interest] Recommendation for fast drawing for QtQuick?

[Samuel Stirtzel]

Hi,

there is also qnanopainter, an opengl / nanovg based painting library
for qt, it is available under the zlib license at
https://github.com/QUItCoding/qnanopainter
However, I only used this on an i.MX6Q with entaviv on qt 5.15 years
ago, the performance was very good though.

Am Mi., 8. Mai 2024 um 22:19 Uhr schrieb Stan Morris <pixelgrease at gmail.com>:
>
> I need to draw a lot of lines with low CPU utilization in a QtQuick app on ARM i.MX8. Neither QML Shapes nor QNanoPainter are fast enough.
>
> What do you recommend?
>
> Drawing with QSGGeometry is fast enough, but I need to draw lines with widths greater than one pixel and there's an annoying notch on line joins. My first attempt at rounded end caps ends up as single pixels. I see there are ways to draw circles... but I feel like QSGGeometry is the wrong direction. This is Qt 6.7 on Linux (could be Qt 6.8 in a few months).  Surely there is something better?
>
> QSGRenderNode and QRhi look promising, but I want to get an opinion before I spend the next few weeks exploring QSGRenderNode. Also, it would be nice to draw text from C++ to keep the interface simple.
>
> Thanks, Stan
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-- 
Regards
Samuel