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**Jeffrey S. Sparks**

Much better than my simple definition!

Jeff

"MICHAEL" wrote in message
...

"Adam Albright" wrote in message
...
On Tue, 6 Mar 2007 22:47:55 -0800, "Justin" wrote:

wrote in message
...
You had that one pegged right, not once have I ever noticed a screen
tearing
issue in XP. Can you give me an example of where this would be
noticable
(web
browsing, video playback, ???). Give me a simple test and I will try it
on
my
XP box and then on my Vista box and see if there is a difference.

It's not black and white. It depends on the machine. Open a large VS
project, open Photoshop, have outlook open and browse the web, now open a
large movie. While you're waiting for the movie to start start dragging
IE
around.
Everyone experiences tearing for their own reasons. Usually when
explorer.exe starts using too much CPU.

Wow, I finally discovered what Justin is very good at: Backpedaling.

What's so damn funny is there isn't a technical term called "tearing".
Did you make it up or did some other dope? You keep getting confused
over marketing hype. Too bad.

http://www.microsoft.com/windows/pro...nces/aero.mspx
When using Windows Aero, open windows glide smoothly on your screen when
you move or resize them. There are no redraw artifacts, latency, or
"tearing" effects that you sometimes see, particularly in windows that
display dynamic content such as video. Using Aero will even reduce legacy
graphics driver-related problems on your system, giving you an even more
confident and stable Windows desktop experience.

http://msdn2.microsoft.com/en-us/library/aa480220.aspx

In Windows XP, applications update their windows directly when the OS
requests them to. These requests could be executed asynchronously with
respect to the refresh rate of the monitor or to any updates that may be
currently running. The effect of these requests is that the user sees
windows tearing and re-drawing incorrectly or slowly. The DWM style of
window presentation eliminates the tearing artifacts, providing a high
quality desktop experience. The benefit to the end user is that the system
appears to be more responsive and the experience is cleaner.

http://en.wikipedia.org/wiki/Page_tearing
Page tearing is a phenomenon in computer and video games where a
previously rendered frame overlaps a newly rendered frame, creating a torn
look as two parts of an object - a wall, for example - don't line up.

In vertical synchronization (V-sync), the previous frame is held before
rendering the next frame, creating a smoother look.

The faster the monitor's response time, the less page tearing, the higher
the monitor's refresh rate, and the higher the frame rate.

http://www.virtualdub.org/blog/pivot/entry.php?id=74

Tearing is a display artifact that occurs when images are presented to the
screen without regard for the current status of the output circuitry. It
occurs because pixels are sent to the screen gradually in book order
rather than instantaneously. What happens is that the output DAC reads
across the same area of the screen that is bring written to, so the
monitor ends up showing a half-updated image. The result is a momentary
frame that has half of an old frame and half of a new one, with a clean
horizontal split across (the tear). Because the location of the tear
varies according to timing, it usually jumps all over the place, which can
be distracting.

http://www.2seetv.co.uk/acatalog/Glossary_of_Terms.html

Tearing - A lateral displacement of the video lines due to sync
instability. It appears as though parts of the images have been torn away.