How underlying WPF concepts and technology are being used in the DWM

re: How underlying WPF concepts and technology are being used in the DWM

JoeW — Fri, 09 Jun 2006 17:58:05 GMT

Thanks Greg,
You mention 2D/3D integration. How high-level are these MIL data structures? I always thought these structures were very basic 2D primitives (Rectangle, Ellipse etc). Surely it's overkill to have an unmanaged class for every managed compisition class in the WPF world.

milcore.dll — общее ядро WPF и DWM [Грег Сшетчер]

Олег Михайлик — Fri, 09 Jun 2006 17:59:20 GMT

Напоминаю: WPF — Windows Presentation Foundation или Avalon. DWM — Desktop Windo

Occlusion

Koro — Fri, 09 Jun 2006 19:31:44 GMT

"Occlusion culling support"...

Is that why all is black behind a maximized window's frame? It seems to treat them as opaque even with Aero disabled, and it's pretty ugly.

re: How underlying WPF concepts and technology are being used in the DWM

Koro — Fri, 09 Jun 2006 19:50:30 GMT

I meant Aero ENABLED, sorry.

re: How underlying WPF concepts and technology are being used in the DWM

Martin — Fri, 09 Jun 2006 23:01:06 GMT

Thanks for the great info Greg! One area of casual concern for me is support for high resolution monitors. Support for that isnt perfect (eg the mouse moves really slowly, dialogs appear offscrene), but its coming along. I hope its good for the release.

I must say im pretty impressed with Vista, though it is a bit on the slow side...

re: How underlying WPF concepts and technology are being used in the DWM

n4cer — Sat, 10 Jun 2006 10:56:41 GMT

"Is that why all is black behind a maximized window's frame? It seems to treat them as opaque even with Aero [enabled], and it's pretty ugly."

That's a visual design choice, not a limitation of the DWM. They blacked out underlying content because the user usually wants to only deal with the content of that window if it's maximized and not have underlying content as a distraction.

It's discussed in this C9 video:
http://channel9.msdn.com/ShowPost.aspx?PostID=161254

and in this post:
http://channel9.msdn.com/ShowPost.aspx?PostID=161389#161389

"for max'd windows, [Dark UI elements] puts the focus on the content of the windows. (aka "swelling force") + more obvious difference between max and restored windows"

re: How underlying WPF concepts and technology are being used in the DWM

Andrew — Wed, 21 Jun 2006 04:58:57 GMT

"Is that why all is black behind a maximized window's frame? It seems to treat them as opaque even with Aero [enabled], and it's pretty ugly."

When a Window is maximized there is no need to show content behind the window, unless the window is not totally opaque. Occlusion filters elements to prevent unseen elements from passing through the graphics pipeline. This increases performance dramatically.

In the case you speak of, with Aero on and the black visible, I believe that is a bug. I have seen it show up when turning Aero on and off in the December CTP.

---------

“That's a visual design choice, not a limitation of the DWM. They blacked out underlying content because the user usually wants to only deal with the content of that window if it's maximized and not have underlying content as a distraction.”

What you are referring to is something totally different. I think you misunderstood the question. He was not referring to the dark styling or the darkening of the desktop when the user’s attention is needed (like Flip 3D). He was referring to how the DWM blacks out everything behind the window, the elements are culled out.

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