[Interest] WebEngineView Redraw / Performance Issues on Windows

[Dominik Rau]

Hi all,

I'm facing terrible issues with WebEngineView on various machines and 
hope that maybe someone here can help:

I'm supposed to display a website inside of my Qt application (don't 
want to share customer site it here but can be sent off list). It's a 
rather easy (from a functional perspective) but fancy React App, blurred 
background, a list with checkboxes, hover, email field. The site works 
perfectly fine in every browser I tested (edge, ff, ...) on every 
hardware mentioned below.

However, it seems that as soon as I put it in a (QML) WebEngineView, the 
redraw mechanism fails:

While the background remains visible, the list in the forground 
disappears, is redrawn partially, with artifacts, very unperforming or 
all at once. Sometimes the blur of the background image disappears (but 
disabling the blur doesn't help either)

  I tried with Qt 6.4.1 on OpenGL, 6.5.2 OpenGL and Direct3d and with 
current 6.6 beta, I tried various black magic chrome environment 
variables like --enable-gpu-rasterization etc. but nothing seems to 
help. Best I can get is 6.4.1 with OpenGL but that comes with horrible 
performance issues on the intended target hardware (MS Surface 8/9 with 
Intel Iris XE).

While OpenGL / Qt 6.4.1 seems to work fine on my (Nvidia) dev machine, 
most other issues I just mentioned appear on Intel and on my 1060 Nvidia 
machine when using direct3d11 backend.

Unfortunately, I know next to nothing about web development, but is 
there anything I can tell the web developers to do / don't do to get rid 
of this? Are there any log settings I can enable to shed some light on 
this? Would chrome://gpu be of help for you guys?

Deadline is approaching (fast) so any input would be highly appreciated!

Thanks and kind regards
Dominik