QglWidget: get depth buffer allowed values

There is a possibility to gather depth buffer possible values so that I know, prior calling QGLFormat::setDepthBufferSize, if the system supports 24 or 32bit depth buffer size?

Maybe using QDesktopWidget::depth() will help?

Code:

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int depth = qApp->desktop()->depth();

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But it will return the current depth really, not all supported.

Thank you very much Oleg. It doesn't really matter if I can't get all the depth buffer sizes supported; setting the Qt application to use the actual desktop depth is OK!