Re: [orca-list] Video interceptor

[MENGUAL Jean-Philippe <texou actux eu org>]

Hi,

Thanks very much! Your URL to the article is absolutely what I was 
searching for. I have there exactly what I wanted: not so much 
technical, but enough to have a precise technical idea of the situation.

Thanks again!

Le 18/11/2013 19:10, Christopher Chaltain a écrit :
> 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,