Display image pattern using Qt + eglfs and OpenGL

  • Hii,

    I'm running the application 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 800 * 480 1280 * 720 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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