[gui-talk] ScreenReader Theory Question

[Jude DaShiell]

Most screen readers build an on screen model data base and then provide 
information from that data base.  The nvda project has a different 
approach though.  Depending on the screen reader in use, it may or may 
not have scripting support capability and may or may not have support 
scripts pre-installed or available for later installation from the 
internet.  Also, screen readers may or may not have heavy dependencies 
on video drivers.  When video drivers develop a conflict because a 
screen reader grabs a video intercept that the software package was 
expecting to use, you got a problem situation.  Some screen readers have 
add-ons and plug-ins that can be downloaded and used and this may go 
well beyond basic script support whether or not those scripts get 
compiled.  That may help to explain some of the variability you have 
noticed.

On Tue, 7 May 2013, Dave Marthouse wrote:

> I've noticed over the years that there are apps that work in some
> screenreaders out of the box and don't work in others.  Naturally there are
> some other apps that aren't accessible at all no matter what screenreader
> you use.  
> 
> My question is based on the premise that all screenreaders tap into hooks in
> the operating system.  If that's so why is there the disparity between
> screenreaders that I've outlined above?  One would think that all the
> screenreaders tap into the same underlying hooks in the os.  Or am I too
> simplistic about this?
> 
> Any information would be appreciated to help scratch this itch.
> 
> 
> 
> 
> Dave Marthouse
> dmarthouse at gmail.com
>  
> 
> 
> _______________________________________________
> gui-talk mailing list
> gui-talk at nfbnet.org
> http://nfbnet.org/mailman/listinfo/gui-talk_nfbnet.org
> To unsubscribe, change your list options or get your account info for gui-talk:
> http://nfbnet.org/mailman/options/gui-talk_nfbnet.org/jdashiel%40shellworld.net
> 
> 

---------------------------------------------------------------------------
jude <jdashiel at shellworld.net>
About to block another web browser version?  Ask yourself what Tim
Berners-lee would do.