Microsoft.DwayneNeed

New Post: Thank you

DwayneNeed — Tue, 21 May 2013 16:51:09 GMT

Awesome, sounds like a great use of this technique.

New Post: Thank you

cwford — Tue, 21 May 2013 16:38:40 GMT

Dwayne,

I know the original post on multi UI threads is six years old, but it really saved me some headaches when I needed to show a busy indicator while a third-party control had the main UI thread tied-up in a way I couldn't offload to a background worker.

Just wanted to say thanks for a very useful piece of code.

New Post: Running background video

DwayneNeed — Thu, 04 Apr 2013 19:43:52 GMT

AVI is just a container format. The video stream inside of it can be in virtually any format, including Full Frame (Uncompressed), Intel Real Time (Indeo), Cinepak, Motion JPEG, Editable MPEG, VDOWave, ClearVideo / RealVideo, QPEG, and MPEG-4 Video.

I'm not certain the codec is the problem. It might simply be that the video is too large, or that the WPF app is using software rendering for some reason.

New Post: Running background video

icube — Thu, 04 Apr 2013 06:39:34 GMT

Hi thanks for the reply.

The video I am running is at HD 1920 by 1080 resolution, in Avi format and it's 12.2MB. I will try different codecs. But how do i know what codec is it running in wpf?

Thanks!

New Post: Running background video

DwayneNeed — Wed, 03 Apr 2013 19:19:58 GMT

WPF already decodes video on separate threads, so that is why you did not see any advantage.

Is the video running at full resolution? That might be pretty heavy regardless. Try using a lower-resolution video if it is just for background effects.

Try different codecs. The degree of GPU acceleration differs depending on the codec.

Is your app using layered windows (semi-transparent)? If so, we have to read the video memory into system memory which is pretty expensive.

Are you using software rendering? That can be very expensive. WPF can render in hardware (GPU assist) and it also supports in rendering on the CPU. The CPU us much more expensive. Perhaps your app is rendering in software? You can force software rendering, but you cannot force hardware rendering. WPF uses hardware rendering if it thinks the GPU is supported (and it has not been forced to use software).

Good luck!

New Post: Running background video

icube — Wed, 03 Apr 2013 04:54:16 GMT

Hi, I've a touch screen application built using WPF running at HD resolution (1920 x 1080) and i have a looping background video that is also in HD. The background video runs as long as the lifetime of the app. The UI is placed "above" (in z order). However the UI's rendering seems jerky and laggy and I want to improve this performance. I tried using the VisualWrapper in my app to run the video in the wish to run the video in another thread however, the result is still the same, i still face jerkiness and lagging. When i run the app without the video running, my UI runs smoother as expected. Can you suggest a way to improve my UI responsiveness?

THANKS!

Updated Wiki: Home

DwayneNeed — Thu, 28 Feb 2013 05:24:06 GMT

This project contains samples and reusable code for accomplishing interesting scenarios in WPF. All of the samples will (eventually) be included in the single DemoApp click-once download.

Currently, this project demonstrates

Rendering UI on multiple threads.
Snapping bitmaps to the pixel grid.
Writing a customize bitmap source.
Decoding IEEE floating point numbers.
Mitigating "airspace" issues in WPF applications.

In depth discussions of these topics can be found on my blog, at http://blogs.msdn.com/DwayneNeed.

Updated Release: DemoApp (Feb 27, 2013)

DwayneNeed — Thu, 28 Feb 2013 05:20:09 GMT

The DemoApp is a single application that contains multiple demonstrations based on blogs posted to http://blogs.msdn.com/DwayneNeed. Currently, it contains demos for:

Airspace Mitigations

Released: DemoApp (Feb 27, 2013)

Thu, 28 Feb 2013 05:20:09 GMT

The DemoApp is a single application that contains multiple demonstrations based on blogs posted to http://blogs.msdn.com/DwayneNeed. Currently, it contains demos for:

Airspace Mitigations

Source code checked in, #72052

DwayneNeed — Thu, 28 Feb 2013 05:17:22 GMT

updates to match blog

Source code checked in, #72051

DwayneNeed — Thu, 28 Feb 2013 05:10:46 GMT

click once publishing

Created Release: DemoApp (Feb 27, 2013)

DwayneNeed — Thu, 28 Feb 2013 04:58:49 GMT

The DemoApp is a single application that contains multiple demonstrations based on blogs posted to http://blogs.msdn.com/DwayneNeed. Currently, it contains demos for:

Airspace Mitigations

Updated Release: DemoApp 1.0.0.2 (Feb 27, 2013)

DwayneNeed — Thu, 28 Feb 2013 04:54:43 GMT

This version of the DemoApp brings improvements to the airspace demo. I have fleshed out the options configuration for the various settings related to MdiView, MdiWindow, WebBrowserEx, and DWM.

Source code checked in, #72049

DwayneNeed — Thu, 28 Feb 2013 04:29:55 GMT

misc GDI

Updated Wiki: Home

DwayneNeed — Wed, 27 Feb 2013 03:50:49 GMT

XNA Game Studio 4.0

Currently, this project demonstrates

Rendering UI on multiple threads.
Snapping bitmaps to the pixel grid.
Writing a customize bitmap source.
Decoding IEEE floating point numbers.
Mitigating "airspace" issues in WPF applications.

In depth discussions of these topics can be found on my blog, at http://blogs.msdn.com/DwayneNeed.

Source code checked in, #71678

DwayneNeed — Wed, 23 Jan 2013 05:53:08 GMT

Win32: checkpoint

Source code checked in, #71593

DwayneNeed — Thu, 17 Jan 2013 07:42:02 GMT

Win32 restructuring

Source code checked in, #71581

DwayneNeed — Wed, 16 Jan 2013 07:28:42 GMT

Win32: checkpoint

Source code checked in, #71557

DwayneNeed — Mon, 14 Jan 2013 06:33:44 GMT

changed my mind on how to organize the win32 interop code... more to come.

Source code checked in, #71551

DwayneNeed — Sat, 12 Jan 2013 01:49:30 GMT

more GDI stuff