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.

    Regards,
    Ambika


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