Re: Accessibility issues of GUI interface in Linux

[Whistler <whistler blinksoft com>]

166.70.136.7
It neither sends graphics or sends text.  It sends commands to your client
to display something.  These commands can be acted on however you like as
long as you stay within the X protocal.

I think that this is something that would need to be researched off group
because while this is about access  the information will be better found
in researching X on the internet.

Ken

On Wed, 18 Aug 1999, Martin McCormick wrote:

> 	The question I have always had about X Windows is what kind of
> traffic goes through the Ethernet or serial cable during a session?  If
> the screen displays a menu or some other text, did the server send it
> as text with font and formatting information such as is done in a
> well-designed html document or does it send a video raster with pixels
> turned on in the shapes of the text like a facsimile transmission.
> 
> 	If it is a bit map or raster, we have exactly the same mess as
> in Windows.  If it sends most text as ASCII with VT100-style codes to
> give it color and place it in the correct part of the screen, then
> there is reason to hope.
> 
> 	I would expect that there should be a combination of modes to
> allow for free-form graphics such as pictures as well as methods for
> handling text.  Being able to send text as text helps far more than
> those who are blind.  There is about a 10 to 1 reduction in traffic
> when sending a 4,000-char block of text compared with sending a
> picture of a page.  This also effects storage and the ability to
> retrieve data based on key words.  
> 
> 	Knowing how X works will tell us where the real trouble is
> because text that turns in to pictures makes the decoding process much
> less accurate and more computationally intensive than just sending the
> text.
> 
> 	What, then, do the raw data look like when a UNIX system is
> speaking X with a remote system or servicing a X login on the local
> system?
> 
> Martin McCormick
> 
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