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Qt Quick WebGL Streaming is a technology by which any Qt Quick ("QML") application can display its user interface to a user connecting via a web browser. It is provided as a Qt platform plugin in a library called libqwebgl.so. However, the Ubuntu 19.10 distribution does not contain it, and seemingly Ubuntu 20.04 does also not contain it.

How can I install it myself?

tanius
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1 Answers1

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  1. Install the dependencies:

    sudo apt install qtbase5-private-dev libqt5websockets5-dev

  2. Download the source code of the Qt WebGL Streaming plugin. Here we choose Qt 5.12.4, as suitable for Ubuntu 19.10. Choose a different version from the Qt downloads page if your distribution comes with a different version of Qt.

    wget https://download.qt.io/official_releases/qt/5.12/5.12.4/submodules/qtwebglplugin-everywhere-src-5.12.4.zip

    Alternatively, you can also clone the repository:

    git clone https://github.com/qt/qtwebglplugin

  3. The usual build process: unpack the archive, run qmake, then run make.

  4. Copy the resulting libqwebgl.so library to where Qt processes look for the platform plugins:

    sudo cp build/plugins/platforms/libqwebgl.so /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/
tanius
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  • Looks like on Ubuntu 22.04 they have a lot of link errors, for example: /usr/bin/ld: /usr/lib/x86_64-linux-gnu/libQt5ThemeSupport.a(qdbusmenuadaptor.o): in functionQDBusMenuAdaptor::QDBusMenuAdaptor(QDBusPlatformMenu)': (.text+0x11): undefined reference to `QDBusAbstractAdaptor::QDBusAbstractAdaptor(QObject)'` – Dmitry Mikushin Dec 10 '22 at 00:24