Re: [orca-list] Video interceptor

[Christopher Chaltain <chaltain gmail com>]

Window Eyes definitely uses, or at least use to use video interception. 
Here's a knowledge base article from GW Micro explaining it's use of 
video interception 
http://www.gwmicro.com/Support/Knowledge_Base/?kbnumber=GWKB1073

Note that Freedom Scientific, GW Micro, Microsoft and others worked on a 
driver chaining protocol used when multiple access technologies all 
wanted to tap into the video chain and insert their device drivers into 
the device driver stack. This allowed users to have both JAWS, Window 
Eyes and other magnification programs using video interception to 
coexist on the same machine. As above, this is also easy enough to find 
with Google if you want more information.

On 11/18/2013 09:08 AM, Alex Midence wrote:
> As far as I know, Video Intercepter is only found in Jaws.  I don't think
> Window Eyes and NVDA use it.  I also don't think it's used in Linux since
> Linux has at-spi which is far more comprehensive than MSAA.  MSAA is
> Microsoft Accessibility so, you will not find it in Linux at all and, even
> in Windows it is being replaced by UIA because it is so out dated.
>
> HTH,
> Alex M
>
>
> -----Original Message-----
> From: orca-list [mailto:orca-list-bounces gnome org] On Behalf Of MENGUAL
> Jean-Philippe
> Sent: Saturday, November 16, 2013 4:30 PM
> To: orca-list gnome org
> Subject: [orca-list] Video interceptor
>
>
>
> Hi,
>
> I have to do a talk soon about the screen readers, and I'll talk about ORCA,
> of course. I wonder if someone can help me about a technical
> point: video interceptor.
> I'd like to know what's this and how it works (in the guidelines), to
> compare with commercial screen readers such as Jaws for Windows. If I
> understand, it's an utility which enables a screen reader to understand the
> widgets that are not connected to the MSAA. Am I right? Could I be more
> precise or more exact technically  ? On Linux, could an equivalent exist or
> is it excluded?
>
> Thanks for your help.
>
> Regards,

--
Christopher (CJ)
chaltain at Gmail