[Interest] Quick2 OpenGL inefficiency?

[Giuseppe D'Angelo]

Il 07/03/2016 15:04, Jani Tykka ha scritto:
> It seems that computers with separate GPU there is a decent amount of
> CPU utilised. We are running into problems if the machine lacks GPU,
> then with large images the CPU usage grows drastically. Any suggestions
> how to improve large image painting on QQuickItem? With Quick1 and
> painting directly on HWND/CocoaWindow we didn't experience this high CPU
> usage.

Have you run your application into a CPU/GPU profiler (vTune, NSight, 
...) to better understand what's going on? Note that the current code 
path may trigger an unwanted conversion to ARGB32_Premultiplied.

Cheers,
-- 
Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (UK) Ltd., a KDAB Group company | Tel: UK +44-1625-809908
KDAB - The Qt Experts

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