QtWidgets uses software rendering. It’s completely fine on my 4K display except for a single application, KOrganizer, where it actually takes a while to redraw the UI. You can implement hardware rendering badly too (see QtQuick which is noticeably less responsive than QtWidgets)
Wait, UI toolkits need a render backend? Old FLTK too?
Need? No. But hardware acceleration makes things faster and more efficient.
Sometimes. Most of the times. Not always.
hardware deceleration?
Truat me, you ro not want to experience CPU based rendering on high resolution displays
QtWidgets uses software rendering. It’s completely fine on my 4K display except for a single application, KOrganizer, where it actually takes a while to redraw the UI. You can implement hardware rendering badly too (see QtQuick which is noticeably less responsive than QtWidgets)