GPU-accelerated custom effects for WPF

re: GPU-accelerated custom effects for WPF

bp — Tue, 13 May 2008 02:06:02 GMT

A quick one: I just installed .NET 3.5 SP1 and I've noticed that my WPF application no longer seems to be rendered as resolution independent. When I zoom in using Magnifier the text and lines are pixelated instead of looking like vectors.

What could be causing this?

re: GPU-accelerated custom effects for WPF

Joseph Cooney — Tue, 13 May 2008 14:40:06 GMT

That's happening for me too. On vista SP1 "normal" WPF zooming looks great, but with the the magnifier it looks pixelated and blocky. Has something changed in the way the rendering happens?

re: GPU-accelerated custom effects for WPF

Greg Schechter — Wed, 14 May 2008 01:08:15 GMT

Both 'bp' and 'Joseph Cooney' have noticed that magnification of WPF content using the built in OS Magnifier no longer does resolution independent zoom of content.

That observation is correct.

As a result of a series of changes that are too numerous to describe here, the OS magnifier is no longer "WPF-aware", and does bitmap scaling just like it does of other content. Although we do lose this feature, we believe that without the dependencies that enabled Magnifier to work in a WPF-specific way, we can be more agile in what we provide to WPF customers moving forward.

Note that the above is *only* about out-of-process magnification. When you do zooming (via scaling) within your own WPF application, the rendering continues to be re-rasterized at the higher scale, so everything remains smooth in that most common scenario. This change is strictly about using the external magnifier.

re: GPU-accelerated custom effects for WPF

bp — Wed, 14 May 2008 03:59:11 GMT

Cheers for the explanation. Bit of a shame for the poor Magnifier :)

re: GPU-accelerated custom effects for WPF

Scott Gurvey — Wed, 14 May 2008 19:08:55 GMT

Is the code for that "film strip" scrolling example available someplace? Thanks.

re: GPU-accelerated custom effects for WPF

Shadders — Sat, 31 May 2008 02:41:54 GMT

Hi, are these features available in XP or are they Vista only?

re: GPU-accelerated custom effects for WPF

Yassir — Sun, 01 Jun 2008 20:51:29 GMT

What are the graphic card requirement ?

re: GPU-accelerated custom effects for WPF

Greg Schechter — Mon, 02 Jun 2008 03:44:03 GMT

Scott: film strip scrolling example isn't currently available, but I'll ask around and see if we can get it out there.

Shadders: Yes, these are available for XP also, when you have .NET 3.5 SP1.

Yassir: there really isn't a graphics card requirement here, since these run in software if you don't have a sufficiently powerful graphics card. To run them in hardware, really the only requirement is that you have a PixelShader 2.0 or above level card.

GPU based effects

Lester's WPF blog — Mon, 02 Jun 2008 19:26:19 GMT

A hot new feature in 3.5 SP1 is GPU based effect. Greg Schechter has has a series of posts on this topic.

re: GPU-accelerated custom effects for WPF

Riccardo — Sun, 08 Jun 2008 16:34:51 GMT

These features are available also in W2k3 server, obviously with .NET 3.5 SP1 installed?

Thx

A Series on GPU-based Effects for WPF

Greg Schechter's Blog — Tue, 12 Aug 2008 07:51:58 GMT

GPU-based Effects are a hot new feature in WPF for .NET 3.5 SP1.  I'm going to be blogging a series

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