Re: [orca-list] Video interceptor

[Alex Midence <alex midence gmail com>]

Interesting.  I thought they used some other technology called DCM which was
supposed to be different from Video Intercept.  It's why Window Eyes can
read Powerpoint slide shows but Jaws cannot.  Oh, well.  This is getting off
topic.  You have my thanks as well for the link.  

Alex M


-----Original Message-----
From: orca-list [mailto:orca-list-bounces gnome org] On Behalf Of
Christopher Chaltain
Sent: Monday, November 18, 2013 12:11 PM
To: orca-list gnome org
Subject: Re: [orca-list] Video interceptor

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

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