[yocto] Renderring image using QT + eglfs and OpenGL

Ambika ambika at iwavesystems.com
Fri Nov 25 21:05:47 PST 2016

Thanks for the guide and response.

Can you let know about how can I enable hardware acceleration in my application in yocto dizzy?


From: Khem Raj 
Sent: Saturday, November 26, 2016 9:39 AM
To: Ambika 
Cc: yocto at yoctoproject.org 
Subject: Re: [yocto] Renderring image using QT + eglfs and OpenGL

  On Nov 25, 2016, at 2:00 AM, Ambika <ambika at iwavesystems.com> wrote:

  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%.

it seems there is no h/w acceleration enabled here. You need to figure out why 

  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.

Its a question better suited for qt mailing lists. There are several optimizations that can affect this but you have to know
your load.

  Thanks in advance.
  yocto mailing list
  yocto at yoctoproject.org

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