qt/qtbase.git - Qt Base (Core, Gui, Widgets, Network, ...)

	Commit message (Collapse)	Author	Age	Files	Lines
*	Direct2D QPA: Draw directly to swap chain	Louai Al-Khanji	2014-05-05	1	-1/+6
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	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>
*	Improve direct2d backing store implementation	Louai Al-Khanji	2014-01-27	1	-0/+74
	Add a per-window swap chain to a QPlatformWindow subclass instead of tying it to the backing store. This is needed to support native widgets (as opposed to alien widgets). Change the backing store to draw to an intermediate pixmap and flush to the requested window by using the per-window swap chain. This also opens the door for faster window presentation later on by using the swap chain more intelligently. Also add a changelog entry for the direct2d plugin, which was omitted earlier. [ChangeLog][QtGui][Windows] Introduce experimental direct2d platform plugin for Windows. This plugin shares most code with the current windows plugin, but substitutes a direct2d-based paint engine for window backing stores and pixmaps. Change-Id: I5f54e7e4c1fb15b1639bd26b712fb40ac141e4ac Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>