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List:       pykde
Subject:    Re: [PyQt] QSvgRenderer().render() blocking main thread
From:       Phil Thompson <phil () riverbankcomputing ! com>
Date:       2016-05-20 13:13:24
Message-ID: 5B136090-B61A-4353-96B8-7192E0657C15 () riverbankcomputing ! com
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On 20 May 2016, at 12:55 pm, Wilbert Berendsen <wb@xs4all.nl> wrote:
> 
> Dear friends,
> 
> I am QSvgRenderer to render a SVG file to a QImage in a background
> thread.  All code in the background thread works properly, but during
> the call to QSvgRenderer::render(...) the main (Gui) thread blocks.
> 
> It seems that this is due to the GIL not being released during render()?
> 
> Is there a way to get around this? (without requiring the user to
> patch+recompile qsvgrenderer.sip)
> 
> The render() method takes a noticable time, esp. on larger resolutions.
> 
> It would be very nice to be able to render in a background thread.

I've added the annotations. However there isn't a workaround.

Phil
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