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Qt Quick 2 : Scene Graph Drawing

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  • M Offline
    M Offline
    MAnand
    wrote on last edited by
    #1

    I have existing C++ application for linux platform which is directly writing on framebuffer fb1 to generate waveform.
    Because of framebuffer fb0 and fb1 content overlapping issue we thought to move this application part to another Qt process.

    And, I have started with Scene Graph option to go ahead. I know the Geometry and GeometryNode concept but not able to relate with pixel drawing.

    Please help me on this as I need to put data as collection of pixel and need to consider CPU usage as well.

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    • Cleiton BuenoC Offline
      Cleiton BuenoC Offline
      Cleiton Bueno
      wrote on last edited by Cleiton Bueno
      #2

      Hi,
      Are you using Wayland, X11, EGLFS?

      If I understand your question well, you can draw it using:

      QQuickItem
      QQuickFrameBufferObject
      QPainter

      I would not use QProcess(), since it is in C++, using Qt can run on more than one display.

      Qt Graphics With Multiple Displays On Embedded LInux


      Cleiton Bueno

      Blog | Linkedin | B2Open

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