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Replace old virtual declarations by Q_DECL_OVERRIDE where
applicable.
Errors discovered: QWindowsScreen::primaryOrientation() did not
overwrite any method, changed to orientation().
Task-number: QTBUG-38858
Task-number: QTBUG-38993
Change-Id: Ie85d5235f3cd35c7a24cac3c1c7693c6508b1009
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
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Remove the intermediate pixmap in the backing store and draw directly to
the window swap chain. This is faster and reduces memory pressure on the
graphics card.
In case of native child widgets we need to read back the back buffer,
which incurs an extra copy in this case.
In an artificial benchmark drawing animated full screen
gradients as fast as possible this patch increases performance by 42% on
my current machine from 480fps to around 680fps, i.e. the time for
actually getting the pixels to the screen is now lower.
Change-Id: Ifbeda0e199afec03cecfe76337679a9e9d082bdd
Reviewed-by: Risto Avila <risto.avila@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Andrew Knight <andrew.knight@digia.com>
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This is an alternative plugin for the windows platform. It shares most
code with the current windows plugin, but substitutes a direct2d-based
paint engine for window backing stores and pixmaps.
Change-Id: I78fafd9c5871fa090b49436f5b40ec80f8789f8b
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
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