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Offscreen rendering does not work with Qt 5.13 / 5.14

  • Hi,
    I'm working on an application which captures the contents of a QWebEngine and renderes it to a texture.
    The original window of the QWebEngineView is hidden with setAttribute(Qt::WA_DontShowOnScreen).

    We use this to map web content to 3D objects. This used to work fine with Qt 5.12. Starting with 5.13 it does not work anymore. I've tried to build now with several versions up to 5.14.1.

    As soon as the window is hidden, the webengine does not receive any updates. I can also reproduce this by not setting the WA_DontShowOnScreen flag and then just minimize the window at runtime. This also breaks update.
    So far I've not been able to find any workaround to get the updates back.

    Thanks for any help!

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