[yocto] Renderring image using QT + eglfs and OpenGL

Ambika ambika at iwavesystems.com
Fri Nov 25 02:00:33 PST 2016


I'm running the application (yocto dizzy release) to display the sequence of the image using QT + eglfs as well as OpenGL, below are the observations.

When using QT5 + eglfs:
i. Frame rate is around 56fps with 800*480 resolution display.
ii.Frame rate is around 23fps with 1280 *720 resolution display.
iii.Frame rate is around 11fps with 1920*1080 resolution display.
iv.CPU usage for above three cases is 99%.

When using OpenGL:
i. Frame rate is around 56fps with 800480 1280720 and 1920*1080 resolutions.
ii.CPU usage slightly increases with resolution from around 10% to 18%.

Whats affecting Frame rate in QT5 and how can I increase the frame rate and improve CPU performance.

I'm new to QT as well as image processing. Kindly let me know your thoughts on this to solve.
Thanks in advance.

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