Qt Widgets Rendering Pipeline

I know QT is a very successful graphics library that works incredibly well, so clearly they’re on their game.<p>However.<p>I’m puzzled that a software rasteriser can possibly be performant enough for modern UI applications.<p>If you compare it with other sophisticated UI stacks for example, WPF or chrome (1), you can see a detailed and well considered use of GPU acceleration.<p>Does qt not do this too? I’m very surprised.<p>[1] - <a href="https:&#x2F;&#x2F;www.chromium.org&#x2F;developers&#x2F;design-documents&#x2F;gpu-accelerated-compositing-in-chrome&#x2F;" rel="nofollow noreferrer">https:&#x2F;&#x2F;www.chromium.org&#x2F;developers&#x2F;design-documents&#x2F;gpu-acc...</a>

Cahier looks interesting! A research and note gathering tool.<p><a href="https:&#x2F;&#x2F;getcahier.com&#x2F;" rel="nofollow noreferrer">https:&#x2F;&#x2F;getcahier.com&#x2F;</a>

I didn’t know AGG library this article is referring to. It seems to have a big legacy yet not much is known about the author.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Anti-Grain_Geometry" rel="nofollow noreferrer">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Anti-Grain_Geometry</a>

Qt Widgets was a pleasure to work with. It&#x27;s very well documented, well structured, and easy to extend with your own Widget classes.

Thanks for the interesting read. Your app Cahier looks cool! I&#x27;m developing a note-taking app[1] using Qt C++ and QML and love that combo. Creating complex UIs with animation is much more straightforward with QML and since the model is still on the C++ side and most Qt Quick components are compiled to C++ the performance is close to Qt Widgets.<p>[1] <a href="https:&#x2F;&#x2F;www.get-plume.com" rel="nofollow noreferrer">https:&#x2F;&#x2F;www.get-plume.com</a>

&gt; Widgets draw different types of graphical elements one after the other, changing states rapidly. Since OpenGL excels in rendering lots of data of the same type, but is slow when changing states, this created a performance penalty for Qt Widgets applications.<p>Why does this not hinder QML to be GPU-accelerated? (Or any other GPU-accelerated UI such as WPF, Flutter)

I wish there was a multiplatform MIT alternative or ... Qt change its license prices... it is so expensive!

At a glance, the rendering pipeline doesn’t seem too different than rendering on the web.